The target sensitivity of Advanced Virgo for O4 is about 90-120 Mpc for the BNS range. To achieve this, several hardware upgrades are under process. One of the most relevant concerns installation of the Signal Recycling Mirror, which forms an additional marginally stable cavity along with the power recycling cavity already present in Advanced Virgo. Therefore, to compensate for these (cold)...
Exclusive photoproduction of $\rho^0(770)$ mesons is studied using the H1 detector at the $ep$ collider HERA. A sample of about 900000 events is used to measure single- and double-differential cross sections for the reaction $\gamma{}p\to \pi^{+}\pi^{-}Y$. Reactions where the proton stays intact ($m_Y=m_p$) are statistically separated from those where the proton dissociates to a low-mass...
Precision measurements of the production cross-sections of W/Z boson at LHC provide important tests of perturbative QCD and information about the parton distribution functions for quarks within the proton. We present measurements of the transverse momentum distribution of the vector boson at 13 TeV. If available differential measurements in the side band of the Z-mass peak are also presented. ...
We report new results of the branching fractions $\mathcal{B}(\bar{B}^0\to D^{*+}\pi^{-})$ and $\mathcal{B}(\bar{B}^0\to D^{*+}K^{-})$ measured using $772\times 10^{6}$ $B$-meson pairs recorded by the Belle experiment. The ratio of the branching fractions is measured in a way that allows for the cancellation of systematic uncertainties arising from the $D$-meson reconstruction. Furthermore, we...
We consider the generation of neutrino masses via a singly-charged scalar singlet. Under general assumptions we identify two distinct structures for the neutrino mass matrix. This yields a constraint for the antisymmetric Yukawa coupling of the singly-charged scalar singlet to two left-handed lepton doublets, irrespective of how the breaking of lepton-number conservation is achieved. The...
The ATLAS experiment at the LHC can record about 1 kHz of physics collisions, out of an LHC design bunch crossing rate of 40 MHz. To achieve a high selection efficiency for rare physics events while reducing the significant background rate, a two-level trigger system is used.
The event selection is based on physics signatures, such as the presence of energetic leptons, photons, jets or...
The Higgs boson decay to two W bosons has the largest bosonic branching fraction and can be used to perform some of the most precise measurements of the Higgs boson production cross sections. This talk will present cross section measurements using pp collision data collected at 13 TeV, including those for the different Higgs boson production processes in the Simplified Template Cross Section framework.
Abstract attached as pdf file.
Recent inclusive W,Z measurements and differential results on DY dilepton productions in a wide range of invariant masses are presented, making use of CMS proton collision data at 13 TeV.
The inner tracking system of the CMS experiment, which comprise of Silicon Pixel and Silicon Strip detectors, is designed to provide a precise measurement of the momentum of charged particles and to reconstruct the primary and secondary vertices. The movements of the different substructures of the tracker detectors driven by the operating conditions during data taking, require to regularly...
Inclusive semi-leptonic decays of $B$ mesons are an excellent avenue for the study of B\bar{B} mixing, given their large branching fraction. In this talk, we present the measurement of the time integrated mixing parameter, $\chi_d$, using data collected by the Belle II detector. The Belle II experiment is located at the SuperKEKB laboratory in Tsukuba, Japan where electron-positron collisions...
In a relativistic heavy ion collision, heavy flavor (charm and bottom) quarks are mostly created via hard processes at the early stage of collisions. We present the latest results of the azimuthal anisotropy coefficients v_n for prompt and non-prompt D0 mesons in PbPb, pPb, and pp collisions from the CMS experiment. The studies are about collectivity phenomena in smaller systems (pp and pPb),...
Several searches for supersymmetric partners of the top quark and tau lepton have been performed by the CMS Collaboration using the full dataset of proton-proton collisions collected during the Run 2 of the LHC at a center-of-mass energy of 13 TeV. The main features and results of these analyses will be presented.
Primordial black holes (PBHs) lighter than $10^9\,$g are at present mostly unconstrained, because they evaporate before Big Bang Nucleosynthesis (BBN). Hence, they can not represent a fraction of dark matter (DM). However, their evaporation products can leave an imprint on the early universe observables. In this talk, we will decribe how the public code BlackHawk has been adapted to compute...
We will discuss the approach to the flavour problem
based on modular invariance.
In modular-invariant models of flavour,
hierarchical fermion mass matrices may arise
solely due to the proximity of the modulus $\tau$
to a point of residual symmetry.
This mechanism does not require flavon fields, and modular
weights are not analogous to Froggatt-Nielsen charges.
We show that hierarchies...
The Observation Run 3 (O3) is the longest data-taking period to-date for the LIGO-Virgo global network of ground-based interferometric gravitational-wave (GW) detectors. The GWTC catalog of transient GW events has already been updated for the first six months of the run (O3a: 2019/04/01 -> 2019/19/01) while the analysis of the last five months (O3b: 2019/11/01 -> 2020/03/27, after a one-month...
In the Standard Model, CP violation in the Electroweak sector is parametrized by the Jarlskog Invariant. This is the flavor invariant sensitive to CP violation with the least number of Yukawa matrices that can be built. When higher dimensional operators are allowed, and the Standard Model Effective Field Theory is constructed, numerous new sources for CP violation can appear. However, the...
The LHCb experiment covers the forward region of proton-proton collisions, and it can improve the current electroweak landscape by studying the production of W and Z boson in this phase space complementary to ATLAS and CMS. Several preliminary studies have shown the potential of the LHCb experiment to measure the W boson mass with a muon pT based technique, which could yield a statistical...
We discuss mechanisms of dilepton production in proton-proton collisions with rapidity gap in the main detector and one forward proton in the forward proton detectors. This is relevant for LHC measurements by ATLAS+AFP and CMS+PPS. Transverse momenta of the intermediate photons are included and photon fluxes are expressed in terms of proton electromagnetic form factors and structure...
The latest results obtained with CMS data collected at a centre-of-mass energy of 13 TeV targeting Higgs boson decays into gammagamma, WW, ZZ final states at CMS will be discussed.
We propose a model-independent framework to classify and study neutrino mass models and their phenomenology. The idea is to introduce one particle beyond the Standard Model which couples to leptons and carries lepton number together with an operator which violates lepton number by two units and contains this particle. This allows to study processes which do not violate lepton number, while...
The Einstein Telescope (ET) is a planned third-generation gravitational wave observatory in Europe. The ET observatory is composed of three detectors that together form an equilateral triangle. Each detector consists of two interferometers, one optimised for low frequencies from 3 Hz to 30 Hz and another optimised for high frequencies from 30 Hz to 10 kHz. In order to reach its ambitious...
Liquid argon (LAr) sampling calorimeters are employed by ATLAS for all electromagnetic calorimetry in the pseudo-rapidity region |η| < 3.2, and for hadronic and forward calorimetry in the region from |η| = 1.5 to |η| = 4.9. After detector consolidation during a long shutdown, Run-2 started in 2015 and about 150 fb$^{-1}$ of data at a center-of-mass energy of 13 TeV was recorded. Phase-I...
In this work, we present a new technique to measure the longitudinal and transverse polarization fractions of hadronic decays of boosted $W$ bosons. We introduce a new jet substructure observable denoted as $p_\theta$, which is a proxy for the parton level decay polar angle of the $W$ boson in its rest frame. We show that the distribution of this observable is sensitive to the polarization of...
Several searches for supersymmetry produced through electroweak processes have been performed by the CMS Collaboration using the full dataset of proton-proton collisions collected during the Run 2 of the LHC at a center-of-mass energy of 13 TeV. The main features and results of analyses that select events with leptonic and hadronic final states will be presented.
Flavour physics represents a unique test bench for the Standard Model (SM). New analyses performed at the LHC experiments are now providing unprecedented insights into CKM metrology and new results for rare decays. The CKM picture can provide very precise SM predictions through global analyses.
We present here the results of the latest global SM analysis performed by the UTfit collaboration...
We present a systematic investigation of parton-shower and matching uncertainties of perturbative origin for Higgs-boson production via vector-boson fusion. To this end we employ different generators at next-to-leading order QCD accuracy matched with shower Monte Carlo programs, $\texttt{PYTHIA8}$, and $\texttt{HERWIG7}$, and a next-to-next-to-leading order QCD calculation.
We thoroughly...
Supersymmetric models are characterized by a strong diversity of experimental signatures. Since general-purpose searches have not yet given any clear indication of new physics, dedicated methodologies and tools have been developed to target the regions of the parameter space where the analysis is most challenging and SUSY might still lie undetected. This presentation will describe relevant...
The European Strategy for Particle Physics ESPP has recommended a financial and technical feasibility of the FCC colliders and their infrastructure to be carried out for its next upgrade around 2025/6. The integral FCC program combines in the same 100km infrastructure a high luminosity Higgs and Electroweak factory e+e- collider, FCC-ee, followed by a 100 TeV hadron collider. With its high...
The KATRIN experiment is designed to measure the effective electron anti-neutrino mass $m_\nu$ with a sensitivity close to 0.2 eV by investigating the energy spectrum of tritium $\beta$-decay. After a brief introduction of the experiment, we will focus on the results from our second data taking phase which took place in autumn 2019. For this period, the source activity was increased by a...
Gravitational waves excite quadrupolar vibrations of elastic bodies. Monitoring these vibrations was one of the first concepts proposed for the detection of gravitational waves by Joseph Weber. At laboratory scale, these experiments became known as resonant-bar detectors, which form an important part of the history of GW detection. Due to the dimensions of these bars, the targeted signal...
Measurements of jet suppression and modification in heavy-ion collisions provide powerful and broad information on the dynamics of the hot, dense plasma formed in relativistic nucleus-nucleus collisions. In this talk we present measurements of jet energy loss and modification which are performed using the high-statistics Pb+Pb collision data at 5.02 TeV recorded during 2018 with the ATLAS...
While the axion was originally introduced to "wash out" CP violation from strong interactions, new sources of CP violation beyond QCD (needed e.g. for the matter-antimatter asymmetry) might manifest themselves via a tiny scalar axion-nucleon component. The latter can be experimentally probed in axion-mediated force experiments, as suggested long ago by J.E. Moody and F. Wilczek. In the present...
Supersymmetry models in which R-parity violation occurs predict a wide range of experimental signatures at the LHC, including many high-multiplicity final states without large missing transverse momentum. These models are motivated by the hierarchy problem and for some parameters naturally explain the lightness of the standard model neutrinos. Searches for RPV SUSY signatures require dedicated...
Heavy ion collisions at high energies can be used as an interesting way to recreate and study the medium of the quark-gluon plasma (QGP).
We particularly investigate how jets produced in hard binary collisions evolve within a tentative medium and in particular how the jet-particle momentum components $k_T$ orthogonal to the jet
axis are affected.
We evolved the jets within a medium that...
In this talk we present our theoretical results for the single-diffractive production of open heavy flavor mesons and non-prompt charmonia in pp and pA collisions. Using the color dipole framework, we found that this mechanism constitutes 0.5-2 per cent of the inclusive production of the same mesons. In Tevatron kinematics our theoretical results are in reasonable agreement with the available...
Studies of the CP properties of the Higgs boson in various production modes and decay channels are presented. Limits on the mixing of CP-even and CP-odd Higgs states are set by exploiting the properties of diverse final states.
Searches for dark matter at colliders are a powerful complementary probe to elucidate the nature of this hitherto unobserved form of matter. We present CMS searches for dark matter candidate particles and new mediators interacting with them. Various final states, topologies, and kinematic variables are explored utilizing the full Run-II data-set collected at the LHC. Furthermore, we interpret...
We continue our discussions [1-4] on neutrino electromagnetic properties. In the present talk we start with a short introduction to the derivation of the general structure of the electromagnetic form factors of Dirac and Majorana neutrinos.
Then we consider experimental constraints on neutrino magnetic and electric dipole moments, electric millicharge, charge radii and anapole moments...
BESIII has collected 2.9 of e+e- collision data sample at 3.773 GeV. We report recent measurements of strong phase differences in D0 and D0-bar decays of KSpi+pi-, KSK+K-, K-pi+pi+pi- and K-pi+pi0. The obtained parameters are important to reduce the systematic uncertainty in the gamma/phi_3 measurement at LHCb and Belle II.
First experimental upper limits for stochastic ultra-high-frequency gravitational waves are obtained using data from existing facilities that have been constructed and operated to detect WISPs (Weakly Interacting Slim Particles). Using the graviton to photon conversion in the presence of their magnetic field, we exclude gravitational waves in the frequency bands from $\left(2.7 -...
We present an update on the constraints on general MSSM scenarios with non-minimal sources of flavour violation (NMFV), including all theoretical constraints and the most recent experimental bounds.
Using an MCMC algorithm and the public code SuperIso, we compute various flavour observables and the muon $(g-2)$ and impose the LHC direct search limits.
We present an up-to-date...
We discuss the possibility to use the exclusive $pp \to pp \phi$ and $pp \to pp \phi \phi$ reactions in identifying the odderon exchange, the charge conjugation C = -1 counterpart of the C = +1 pomeron. The odderon was introduced on theoretical grounds in [1]. Results of the TOTEM collaboration suggest that the odderon exchange can be responsible for a disagreement of theoretical calculations...
The upgrade of the Large Hadron Collider (LHC), with an increase of its luminosity up to 5-7 × 10^34cm^−2s^−1, will cause a huge growth of the background rates expected by the experiments. For this reason, the Compact Muon Solenoid (CMS) experiment is going through an upgrade project, which includes the installation of a new station, called GE1/1, consisting of 144 Triple-Gas Electron...
The tree-level determination of the CKM angle gamma is a standard candle measurement of CP violation in the Standard Model. The latest LHCb results from time-integrated measurements of CP violation using beauty to open charm decays are presented. A new combination of all LHCb measurements is also performed. A precision of four degrees is obtained, which dominates the world average.
The JHUGenerator framework includes an event generator of all anomalous Higgs boson interactions in both production and decay and the MELA library for matrix element analyses. The framework also allows using dimension-six operators of an EFT in on-shell and off-shell production together with triple and quartic gauge boson interactions. One new feature is the JHUGenLexicon interface for...
Coherent Elastic Neutrino Nucleus Scattering (CE$\nu$NS) provide a novel window to probe new physics connected with the well established non-vanishing neutrino masses. In this talk we will discuss how in the presence of a transition magnetic moment of neutrinos the CE$\nu$NS experiments have the potential to shed light on the nature of neutrinos: Dirac vs Majorana. In particular, we will take...
We report results from a search for ultralight dark photon dark matter using data from the third observing run of Advanced LIGO and Virgo. This type of dark matter could directly couple to the interferometers and cause a time-dependent quasi-sinusoidal force on the mirrors proportional to the total proton plus neutron number, or just neutron number. We describe two methods to search for this...
We describe an analysis comparing the $p\bar{p}$ elastic cross section as measured by the D0 Collaboration at a center-of-mass energy of 1.96~TeV to that in $pp$ collisions as measured by the TOTEM Collaboration at 2.76, 7, 8, and 13 TeV using a model-independent approach. The TOTEM cross sections, extrapolated to a center-of-mass energy of $\sqrt{s} =$ 1.96 TeV, are compared with the D0...
We introduce a new approach to set limits on long-lived charged particles using neutrino telescopes and apply it to data. Towards the horizon, we expect a suppression of low-energy muons and electrons, due to the amount of material they must traverse, to reach the detector. Should the new long-lived charged particle possess a larger mass than the muon, then its energy loss will be suppressed...
During the second Long Shutdown (LS2) of the LHC, ALICE is installing three new detectors and implementing continuous data readout with online reconstruction and data compression. The changes are needed to benefit from the increased luminosity of the LHC during Run 3 and 4. The ALICE interaction rate will increase by two orders of magnitude, reaching 50 kHz for Pb-Pb and up to 1 MHz for pp...
I will present an analytic computation of the two-loop QCD corrections to ud->Wbb process for an on-shell W-boson using the leading colour and massless bottom quark approximations. The computation involves integration-by-parts reduction of the unpolarised squared matrix element using finite field reconstruction techniques and identifying an independent basis of special functions that allows an...
I will discuss the geometric formulation of the SMEFT and its applications.
The LISA telescope will provide the first opportunity to probe the scenario of a first-order phase transition happening close to the electroweak scale. In thermal transitions, the main contribution to the GW spectrum comes from the sound waves propagating through the plasma. Current estimates of the GW spectrum are based on numerical simulations of a scalar field interacting with the plasma or...
Measurements of CP asymmetries in charmless two-body B-meson decays can be a powerful way to provide stringent tests of the Standard Model. In particular a longstanding anomaly in the CP asymmetries of B decays to a kaon and a pion, known as the K$\pi$ puzzle, can be a hint of physics beyond the Standard Model. We present new results from the analyses of charmless 2-body B decays with kaons...
The LHCb detector is a full spectrometer at forward rapidity covering a pseudorapidity range of 2<eta<5. With its excellent vertex resolution, particle identification and tracking capability, the LHCb is able to perform precision measurements down to very low transverse momentum. We present first LHCb results on heavy flavor in lead-lead collisions at 5.02 TeV, including photoproduction of...
We investigate the inclusive hadroproduction of a Higgs boson in association with a jet, featuring large transverse momenta and separated by a large rapidity distance. We propose this reaction, that can be studied at the LHC as well as at new-generation colliding machines, as a novel probe channel for the manifestation of the Balitsky-Fadin-Kuraev-Lipatov (BFKL) dynamics. We bring evidence...
STEREO and PROSPECT are very short baseline experiments studying antineutrinos produced by highly-enriched nuclear fuel at the research facilities of Institut Laue-Langevin (Grenoble, France) and Oak Ridge National Laboratory (U.S.A.), respectively. Located at about 10 meters from the reactor cores, they investigate the data-to-prediction deficit called the « Reactor Antineutrino Anomaly » by...
The CRESST (Cryogenic Rare Event Search with Superconducting Thermometers) experiment explores with high sensitivity the parameter space of low mass DM candidates, being the pathfinder in the sub-GeV/c^2 mass range. CRESST employs different high-purity crystals and operate them at mK temperature as cryogenic calorimeters The flexibility in employing detectors made of different materials...
BESIII has collected 448.2 M $\psi(3686)$ data set and 10 B $J/\psi$ data set. The huge clean data sample provide an excellent chance to search for new physics. We report the search for decay $J/\psi\to\gamma + invisible$, which is predicted by next-to-minimal supersymmetric model. Without significant signal found, we gave around 6.2 times better upper limits than previous CLEO-c’s results. In...
Latest CMS measurements of top quark pair production, inclusive and/or differential is presented. Boosted regime is included in this talk.
The flavor mixing parameter $\Delta \Gamma_{12}^s$ that governs the lifetime differences of neutral $B_s$ mesons suffers from large uncertainties related to the uncalculated perturbative corrections. In this talk I will present new results on the previously unknown NNLO QCD corrections to the $B_s - \bar{B}_s$ mixing process that lead to a reduction of theoretical errors on $\Delta...
Measurements of heavy baryon production in $pp$, $pA$ and $AA$ collisions from RHIC to top LHC energies have recently attracted more and more attention, currently representing a challenge for the heavy-quark hadronization theoretical understanding.
The $\Lambda_c/D^0$ ratio observed in $AA$ collision at RHIC and LHC energies has a value of the order of the unity. The recent experimental...
Measurement of inclusive jet cross sections in proton collisions at 5 and 13 TeV with the CMS experiment are presented. Measurements are performed as a function of the jet transverse momentum pT and jet rapidity. Jets are reconstructed using the anti-kT clustering algorithm with different size parameters in a wide phase space region in jet pT and jet rapidity. The measured jet cross sections...
Recent searches for BSM Higgses (both neutral and charged) performed by the CMS experiment at a center of mass of 13 TeV will be presented.
The ESS Neutrino Super-Beam (ESSnuSB) is a proposed long-baseline neutrino oscillation experiment, performed with a high-intensity neutrino beam, to be developed as an extension to the European Spallation Source proton linac currently under construction in Lund, Sweden. The neutrinos would be detected with the near and far detectors of the experiment, the former within several hundred meters...
The mass of the discovered Higgs boson is one of its most precisely measured properties with an experimental accuracy at the sub-percent level. Besides its coupling behaviour, which conforms so far with the prediction of the Standard Model, the measured Higgs mass value can place strong constraints on extensions of the Standard Model, in particular supersymmetric ones. To fully exploit this...
This talk will present the latest neutrino oscillation results from the Daya Bay experiment, which consists of eight functionally identical detectors in three experimental sites at different baselines from six 2.9 GW$_{\mathrm{th}}$ nuclear reactor cores. In 1958 days of operation, Daya Bay has collected the largest sample of inverse beta decay events to date, with close to 4 million candidate...
I will discuss a new formulation of the Einstein equations and scalar tensor theories of gravity--the modified generalized harmonic (MGH) formulation--that allows for the stable, well-posed evolution of black holes in a wide variety of scalar-tensor theories. I will discuss recent progress in numerically modeling binary black hole evolution, and scalar+gravitational wave emission, in the...
The latest studies of beauty meson decays to open charm final states from LHCb are presented. Several first observations and branching fraction measurements using Run 1 and Run 2 data samples are shown. These decay modes will provide important inputs to other analyses, and may be used for future measurements of CP violation.
We present predictions of the distribution of groomed heavy jet mass in electron-positron collisions at the next-to-next-to-leading order accuracy matched with the resummation of large logarithms to next-to-next-to-next-to-leading logarithmic accuracy. Resummation at this accuracy is possible through extraction of necessary two-loop constants and three-loop anomalous dimensions from...
The discovery of the Higgs boson with the mass of about 125 GeV completed the particle content predicted by the Standard Model. Even though this model is well established and consistent with many measurements, it is not capable to solely explain some observations. Many extensions addressing such shortcomings introduce additional Higgs-like bosons which can be either neutral, singly-charged or...
The Deep Underground Neutrino Experiment (DUNE) is an upcoming long-baseline neutrino experiment which will study neutrino oscillations. Neutrino oscillations will detected at the DUNE far detector 1300 km away from the start of the beam at Fermilab. The DUNE near detector (ND) will be located on-site at Fermilab, and will be used to provide an initial characterization of the neutrino beam, as...
Testing the couplings of the Higgs boson to quarks is important to understand the origin of quark masses. The talk presents Simplified Template Cross Section measurements for Higgs boson production in association with a vector boson using decays to two b quarks using pp collision data collected at 13 TeV, along with an interpretation in an Effective Field Theory framework. A search for...
The passage of gravitational waves (GWs) through a binary perturbs the trajectories of the two bodies, potentially causing observable changes to their orbital parameters. In the presence of a stochastic GW background (SGWB) these changes accumulate over time, causing the binary orbit to execute a random walk through parameter space. In this talk I will present a powerful new formalism for...
The recent results of DAMA/LIBRA–phase2 experiment deep underground at Gran Sasso are presented. The improved experimental configuration with respect to the phase1 allowed a lower software energy threshold. The DAMA/LIBRA–phase2 data confirm the evidence of a signal that meets all the requirements of the model independent Dark Matter annual modulation signature, at high C.L. The model...
Many extensions to the Standard Model predicts new particles decaying into two bosons (W, Z, photon, or Higgs bosons) making these important signatures in the search for new physics. Searches for such diboson resonances have been performed in final states with different numbers of leptons, photons, as well as jets and b-jets where new jet substructure techniques are used to disentangle the...
Gaseous Time Projection Chambers (TPC) with optical readout are an innovative and very promising detection technique to enhance the the sensitivity for light dark matter candidates.
The Cygno experiment is pursuing this technique by developing a TPC operated with gas mixtures at atmospheric pressure equipped with a Gas Electron Multipliers (GEM) amplification stage that produces visible...
I discuss recent theoretical results with soft-gluon corrections for various top-quark production processes through approximate N3LO, including soft anomalous dimensions through three loops. I present numerical results for total cross sections as well as single- and double-differential distributions for top-pair and various single-top processes, including three-particle final states, and I...
Searches for Higgs boson decays to two second-generation quarks or leptons, based on 13 TeV pp collision data, are presented, as well as indirect constraint of the Yukawa coupling of the Higgs boson to the charm quark.
DAMA/LIBRA observation of an annual modulation in the detection rate compatible with that expected for dark matter particles from the galactic halo has accumulated evidence for more than twenty years. It is the only hint about a positive identification of the dark matter, but it is in strong tension with the negative results of other very sensitive experiments. However, this comparison is...
The LEGEND collaboration is developing an experimental search for the neutrinoless double-beta ( $0\nu\beta\beta$) decay of the $^{76}$Ge isotope.
Its first phase, LEGEND-200, uses 200 kg of $^{76}$Ge-enriched high-purity germanium (HPGe) detectors in an active liquid argon shield and is currently under construction at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy.
Inverted coaxial...
Various measurements related to the study of hadronic jets substructure in proton collisions at 13 TeV with the CMS experiment are presented. The differential jet production cross section as a function of the jet mass and transverse momentum is shown in events with a Z boson plus jet topology, with and without the soft radiation within a jet removed by a jet grooming algorithm. Measurement of...
The Jiangmen Underground Neutrino Observatory (JUNO) is a next-generation liquid scintillator experiment being built in Guangdong province in China. JUNO's target mass of 20 kton will be contained in a 35.4 m acrylic vessel, itself submerged in a water pool, under about 650 m of granite overburden. Surrounding the acrylic vessel are 17612 20'' PMTs and 25600 3'' PMTs. The main goal of JUNO,...
he CKM angle $\gamma$ ($\phi_3$) of the unitarity triangle is the only one that is accessible with tree-level decays in a theoretically clean way. The key method to measure $\gamma$ is through the interference between $B^+\to D^0 K^+$ and $B^+ \to \bar D^0 K^+$ decays that occurs if the final state of the charm-meson decay is accessible to both the $D^0$ and $\bar D^0$ mesons. The Belle II...
Black holes of astrophysical and primordial origin can compress their dark matter environments to extreme densities as they form and grow. This "dark dress" inevitably affects the dynamical evolution of binaries, and imprints a characteristic dephasing onto their gravitational waveforms that could be probed with upcoming interferometers. In this work, we study the prospects for detecting and...
Going beyond the simplified gluonic cascades, we have introduced both gluon and quark degrees of freedom for partonic cascades inside the medium. We then solve the set of coupled evolution equations numerically with splitting kernels calculated for exponential and Bjorken expanding media to arrive at medium-modified parton spectra for quark and gluon initiated jets respectively. Firstly, we...
Measurements in boosted top quark production test the Standard Model in a previously unexplored regime with a strongly enhanced sensitivity to high-scale new phenomena. Dedicated techniques have been developed to reconstruct and identify boosted top quarks. In this contribution measurements of the ATLAS experiment are presented of the differential cross section and asymmetries in this extreme...
The latests CMS results collected at a centre-of-mass energy of 13 TeV and focusing on Higgs boson production and decay in final states involving quarks (ttH, tH, VH Hbb, VH Hcc) will be discussed.
The strong suppression of high-pT jets in heavy-ion collisions is a result of elastic and inelastic energy loss, suffered by the jet multi-prong collection of color charges that are resolved by medium interactions. We develop a novel analytic framework to study the quenched jet spectrum in which we include many energy-loss-related effects, such as resummation of soft and hard medium induced...
Exotic decays of the Higgs boson provide a unique window for the discovery of new physics, as the Higgs boson may couple to hidden-sector states that do not interact under the Standard Model gauge transformations. Models predicting exotic Higgs boson decays to pseudoscalars can explain the galactic centre gamma-ray excess, if the additional pseudoscalar acts as the dark matter mediator. In...
The Any Light Particle Search II (ALPS II) is a light-shining-through-a-wall (LSW) experiment at DESY, Hamburg, attempting to detect axions and axion-like-particles (ALPs), which can comprise dark matter and solve long-standing problems in physics. ALPS II can convert photons into axions/ALPs in the presence of a magnetic field, in an optical cavity. After passing through an opaque,...
There is a guaranteed background of stochastic gravitational waves produced in the thermal plasma in the early universe. Its energy density per logarithmic frequency interval scales with the maximum temperature Tmax which the primordial plasma attained at the beginning of the standard hot big bang era. It peaks in the microwave range, at around 80 GHz [106.75/gs(Tmax)]^(1/3), where gs(Tmax)...
Geoneutrinos, which are anti-neutrinos emitted from the decays of long-lived radioactive elements inside the Earth, are unique messengers of internal regions of our planet. The Borexino detector, located at Laboratori Nazionali del Gran Sasso in Italy, is able to detect the geoneutrinos through inverse beta decay reaction. This measurement is feasible thanks to the large scintillator target...
We study the Higgs boson decays h -> c cbar, b bbar, b sbar, photon photon
and gluon gluon in the Minimal Supersymmetric Standard Model (MSSM) with
general quark flavor violation (QFV), identifying the h with the Higgs boson
with a mass of 125 GeV. We compute the widths of the h decays to c cbar,
b bbar, b sbar (s bbar) at full one-loop level in the MSSM with QFV.
For the h decays to...
Short and long-distance dynamics along with a sizeable effective weak phase caused by the interference between tree and penguin amplitudes in charmless 3-body B decays leads to a rich structure of CP violation as a function of the phase space. We present the latest studies with charmless $B \to 3h$ decays at LHCb, including CP asymmetries and branching fractions
Latest CMS measurements of single top quark, inclusive and/or differential is presented. The talk also covers single top production in association with additional bosons.
A first measurement of the 1-jettiness event shape observable in neutral-current deep-inelastic electron-proton scattering is presented. The 1-jettiness observable $\tau^1_b$ is defined such that it is equivalent to the thrust observable in the Breit frame, following momentum conservation. The data were taken with the H1 detector at the HERA $ep$ collider at a center-of-mass energy of 319 GeV...
The Silicon Vertex Detector (SVD) consists of four layers of double-sided silicon strip sensors. The SVD is one of the two vertex subdetectors within Belle II.
Since the start of data taking in 2019 at the Super-KEKB collider (KEK, Japan), which has the highest peak-luminosity ever recorded, the SVD is operated reliably and with high efficiency, despite exposure to harsh beam...
Recent CMS searches for additional scalars (pp->a, Maaa) will be presented.
The proton-proton (pp) chain and the carbon-nitrogen-oxygen (CNO) fusion cycle process are two processes understood theoretically how stars converted hydrogen to helium. Neutrinos emitted in such processes are the only direct probe of the deep interior of the Sun. Borexino is a liquid scintillator detector targeted at measuring solar neutrinos. It is hosted by the underground INFN Laboratori...
Gravitational-wave (GW) detections are rapidly increasing in number, enabling precise statistical analyses of the population of compact binaries. In this talk I will show how these population analyses cannot only serve to constrain the astrophysical formation channels, but also to learn about cosmology. The three key observables are the number of events as a function of luminosity distance,...
Jet interactions in a hot QCD medium created in heavy-ion collisions are conventionally assessed by measuring the modification of the distributions of jet observables with respect to the proton-proton baseline. However, the steeply falling production spectrum introduces a strong bias toward small energy losses that obfuscates a direct interpretation of the impact of medium effects in the...
The BESIII experiment at the electron positron collider BEPCII in Beijing is successfully operating since 2008 and has collected large data samples in the tau-mass region, including the world’s largest data samples at the J/ψandψ(2S) resonances. The recent observations of hyperon polarizations at BESIII, which opens a new window for searching new physics beyond the SM, also attracts both...
After the triumph of discovering the Higgs boson at the CERN Large Hadron Collider, people are getting increasingly interested in studying the Higgs properties in detail and searching for the physics beyond the Standard Model (SM). A multi-TeV lepton collider provides a clean experimental environment for both the Higgs precision measurements and the discovery of new particles. In high-energy...
Processes involving the Higgs boson and the top quark are of high interest in searches for BSM physics because they allow to directly measure the top Yukawa coupling. Although it has a relatively small cross section, the single top and Higgs production process pp → Htj is particularly sensitive to new physics, calling for precise theoretical predictions. For many processes at the LHC, a...
The presence of charged Higgs bosons is a generic prediction of multiplet extensions of the Standard Model (SM) Higgs sector. Focusing on the Two-Higgs-Doublet-Model (2HDM), we discuss the charged Higgs boson collider phenomenology in the theoretically and experimentally viable parameter space. While almost all existing experimental searches at the LHC target the fermionic decays of charged...
The SuperKEKB/Belle II experiment, the successor of the former KEKB/Belle experiment at KEK, has started its physics data taking with the full detector system since March 2019. The Time-of-Propagation (TOP) detector was designed and integrated into the Belle II detector for particle identification in the barrel region. The TOP detector consists of quartz radiators and photodetectors,...
Recent advances in development of gaseous Time Projection Chambers (TPCs) with ability to reconstruct the direction of ionisation tracks at low energy, opens the possibility of building a nuclear recoil observatory capable of detecting directional signals from WIMP dark matter and coherent elastic neutrino-nucleus scattering (CEvNS) events from solar neutrinos. CYGNUS aims to achieve this...
Hbb associated production is often advocated as an ideal proxy to measure the bottom-quark Yukawa coupling yb. However, large irreducible background exists, which make the extraction of yb very challenging, if not impossible. I will discuss some recent calculations which showed how gluon-fusion, VH and VBF production conspire to kill our sensitivity on yb from Hbb at the LHC.
The LUXE experiment (LASER Und XFEL Experiment) is a new experiment in planning at DESY Hamburg using the electron beam of the European XFEL. LUXE is intended to study collisions between a high-intensity optical LASER and 16.5 GeV electrons from the XFEL electron beam, as well as collisions between the optical LASER and high-energy secondary photons. The physics objective of LUXE are processes...
Multi-particle cumulants of azimuthal angle correlations are compelling tools to constrain the initial conditions and probe the properties of the quark-gluon plasma created in the ultrarelativistic heavy-ion collisions at the LHC. However, only very few of them have been measured experimentally and supplemented with corresponding theoretical calculations.
Using a newly developed...
We report the result of a search for $\tau \to \ell \gamma$ ($\ell = e, \mu$) using the full data sample at Belle. Since the observation of neutrino oscillations has unambiguously shown that the lepton flavor is no longer conserved, we can expect lepton flavor violation (LFV) in the charged lepton sector. Though the standard model (SM) does not predict charged LFV decays at an observable rate,...
Recent developments of the xFitter PDF analysis package and studies based on it are summarised. The emphasis is given to the PDF analysis of the Z boson polarisation data which provide additional constraint to the gluon distribution for Bjorken x below 0.1. Studies using pseudo data samples corresponding to an integrated luminosity of the LHC Run 3 and high-luminosity HL-LHC show that the PDF...
In several searches for additional Higgs bosons at the LHC, in particular the CMS search in the $pp \to \phi \to t \bar t$ channel and the ATLAS search in the $pp \to \phi \to \tau^+\tau^-$ channel, a local excess at the level of $3\,\sigma$ or above has been observed at a mass scale of $m_\phi \approx 400$~GeV. We investigate to what extent a possible signal in those channels could be...
The Southern Wide Field Gamma-ray Observatory (SWGO) is an international R&D project aiming to design and prototype a wide field-of-view gamma-ray facility to monitor the Southern Hemisphere sky in gamma-rays.
SWGO will be placed at a high altitude (above 4.4 km) in South America and aims to provide a good sensitivity for observations from the low energies (~100 GeV) up to the PeV region....
We discuss a ∼ 3 σ signal (local) in the light Higgs-boson search in the diphoton decay
mode at ∼ 96 GeV as reported by CMS, together with a ∼ 2 σ excess (local) in the bb̄
final state at LEP in the same mass range. We interpret this possible signal as a Higgs
boson in the 2 Higgs Doublet Model with an additional complex Higgs singlet (2HDMS).
We find that the lightest CP-even Higgs boson...
Future circular and linear colliders as well as the Large Hadron Collider in the High-Luminosity era have been imposing unprecedented challenges on the radiation hardness of particle detectors that will be used for specific purposes e.g. forward calorimeters, beam and luminosity monitors.
We performed research on the radiation-hard active media for such detectors, particularly calorimeters,...
Collective behaviour of final-state hadrons is studied in ep scattering using the H1 and ZEUS detectors at HERA. Measurements of two- and four-particle azimuthal correlations in both DIS and photoproduction are presented. Ridge yields are extracted from fits to two-particle correlations with H1 data. Comparisons of the magnitudes and signs of the first- and second-harmonic of two-particle...
The measurement of exclusive $e^+e^-$ to hadrons processes is a significant part of the physics program of BABAR experiment, aimed to improve the calculation of the hadronic contribution to the muon $g−2$ and to study the intermediate dynamics of the processes. We present the most recent studies performed on the full data set of about 470 fb$^{−1}$ collected at the PEP-II e+e− collider at a...
Testing the couplings of the Higgs boson to leptons is important to understand the origin of lepton masses. This talk presents measurements of Higgs boson production in Higgs boson decays to two tau leptons based on pp collision data collected at 13 TeV.
NOvA is a long-baseline neutrino oscillation experiment. Its large tracking calorimeters can detect and identify muon and electron neutrino interactions with high efficiency. Neutrinos produced by the NuMI beam are detected by a Near Detector, located at Fermilab, and a much larger Far Detector, located 810km away in Ash River, Minnesota. NOvA can measure the electron neutrino and antineutrino...
The detection of ultra-rare events as the interaction of galactic dark matter (DM) candidate particles or of neutrinos originated from the Sun requires the development of innovative detection techniques. In particular future experiments for direct DM detection requires to extend their sensitivity to masses well below 10 GeV.
The Cygno collaboration plans to build and operate at LNGS a cubic...
The Pierre Auger Observatory (PAO) has recently detected significant correlations between the arrival directions of ultra-high-energy cosmic rays (UHECRs) and positions in the sky of local star-forming galaxies. We interpret these results in terms of the local density of sources and the magnetic fields governing the UHECR propagation [1]. We determine the level of UHECR deflections for an...
The first row of the Cabibbo-Cobayashi-Maskawa (CKM) matrix shows a discrepancy of $\sim 3\sigma$ with unitarity, known as the ”Cabibbo Angle Anomaly” (CAA). After reviewing the origin and status of the anomaly, I investigate the various possibilities to explain it in the context of physics beyond Standard Model (BSM) which can be broadly grouped into three categories: modifications of...
The spectacular progress in the improvement of scintillation properties of Ce doped Gd-based crystalline compounds was demonstrated in the last decade. That makes possible use of these materials for neutron detection, similarly to Li-based inorganic scintillators. Particularly, the materials of interest are compositionally disordered Gd3Al2Ga3O12 (GAGG) garnets, which are tolerant to a...
We present a new release of the NNPDF family of global analyses of the proton's parton distribution functions: NNPDF4.0. It includes a wealth of new experimental data from HERA and the LHC, from dijet cross-sections and isolated photons to single-top and top-quark pair differential distributions. The NNPDF4.0 methodology benefits from improved machine learning algorithms, in particular...
Many new-physics signatures at the LHC produce highly boosted particles, leading to close-by objects in the detector and necessitating jet substructure techniques to disentangle the hadronic decay products. This talk presents the latest ATLAS results for searches for heavy W’ and Z’ resonances in top-bottom, di-top and 4-top final states using 13 TeV data. It will explain the techniques...
The latest results obtained with CMS data collected at a centre-of-mass energy of 13 TeV targeting Higgs boson decays in leptonic final states at CMS will be discussed.
Supermassive black hole (SMBH) coalescences are ubiquitous in the history of the Universe and often exhibit strong accretion activities and powerful jets. These SMBH mergers are also promising candidates for future gravitational wave detectors such as Laser Space Inteferometric Antenna (LISA). In this work, we investigate the neutrino and electromagnetic counterpart emissions originating from...
By virtue of their high temperatures, supernovae can produce large fluxes of MeV-scale dark matter even at couplings stronger than those constrained by cooling. In this region of parameter space, the dark matter can become diffusively trapped by scatterings within the protoneutron star, ultimately escaping with semirelativistic velocity. I will show that this can lead to the formation of a...
We study $Z^{\prime}$ phenomenology at hadron colliders in an $U(1)^{\prime}$ extended MSSM. We choose a $U(1)^{\prime}$ model with a secluded sector, where the tension between the electroweak scale and developing a large enough mass for $Z^{\prime}$ is resolved by incorporating three additional singlet fields into the model. We perform a detailed analysis of the production, followed by...
Measurements of anisotropic flow ($v_n$) provide valuable information on the properties of the quark-gluon plasma.
Along with studies of standard flow observables, one can use strong fluctuations of the anisotropic flow for an efficient selection of the events corresponding to a specific initial geometry. Another quantity with unique sensitivity to physical processes in the initial state ...
The Belle II experiment is a substantial upgrade of the Belle detector and will operate
at the SuperKEKB energy-asymmetric e+e− collider. The design luminosity of the machine
is 8 × 1035 cm−2s−1 and the Belle II experiment aims to record 50 ab−1 of data, a factor
of 50 more than its predecessor. From February to July 2018, the machine has completed a
commissioning run and main operation of...
Gamma-ray bursts (GRBs) are transient events releasing a large amount of energy in a short amount of time as electromagnetic radiation. In the past decades, both observational and theoretical efforts were made to understand their inner workings, both in the prompt and afterglow phase. The origin of the GeV emission detected by Fermi-LAT in several GRBs is one of the aspects of GRB physics...
The Standard Model predicts several rare Higgs boson decay channels, among which are decays to a Z boson and a photon, H→Zγ, and to a low-mass lepton pair and a photon H→ℓℓγ. The observation of these decays could open the possibility of studying the CP and coupling properties of the Higgs boson in a complementary way to other analyses. Results based on 139 fb−1 of pp collision data collected...
A fraction of the dark matter in the solar neighborhood might be composed of non-galactic particles with speeds larger than the escape velocity of the Milky Way. The non-galactic dark matter flux would enhance the sensitivity of direct detection experiments, due to the larger momentum transfer to the target.
In this note, we calculate the impact of the dark matter flux from the Local Group...
Heavy quarks are excellent probes to study the initial stages of heavy ion collisions since they are generated in the early times around 0.1 fm/c together with a thermalization time that is comparable to the lifetime of the QGP phase. Ultra-relativistic heavy ion collisions are expected to generate a huge electromagnetic (e.m.) field that is expected to generate a splitting of the directed...
The Belle experiment has accumulated close to $1\,{\rm ab}^{-1}$ of data in electron-positron collisions at center-of-mass energies around various $\Upsilon(nS)$ resonances. These data can be used to perform a number of new physics searches in the context of dark sector with an unprecedented precision. We present for the first time the results of a search of the dark photon in $B$-meson...
A double-phase argon Time Projection Chamber (TPC), with an active volume of $5\times 5 \times 5$ cm$^3$, has been designed and constructed for the Recoil Directionality (ReD) experiment, within the DarkSide collaboration. The aim of the ReD project is to investigate the directional sensitivity of argon-based TPCs via columnar recombination to nuclear recoils in the energy range of interest...
We will discuss the sensitivity to quartic anomalous couplings between photons and W/Z bosons at the LHC using intact protons in the final state. This allows obtaining a negligible background for 300 fb−1 of data and improves the sensitivities to anomalous couplings by two or three orders of magnitude compared to standard methods. We will also discuss the sensitivity to axion-like particles...
Recent measurements of Higgs boson properties and couplings will be presented.
Simulations of peripheral Au+Au collisions at NICA energies was performed in the PHSD transport model. The properties of velocity and vorticity fields, hydrodynamic helicity was studied at different impact parameters and energies. The general structure of velocity field follows the "little bang" pattern which may be quantified by the velocity dependence allowing to extract the "Hubble"...
We present a systematic interpretation of vector boson scattering (VBS) and diboson measurements from the LHC in the framework of the dimension-six Standard Model Effective Field Theory (SMEFT), based on our results available at https://arxiv.org/abs/2101.03180.
We try to understand what is the interplay between VBS and diboson measurements in order to constrain 16 independent directions in...
The Parton Branching (PB) approach provides a way to obtain transverse momentum dependent (TMD) parton densities. Its equations are written in terms of splitting functions and Sudakov form factors and can be solved with Monte Carlo methods. Even though the transverse momentum is known in every branching, the PB method currently uses the DGLAP splitting functions, which assume that the parton...
Over the last decade, significant advancements in semiconductor charge detectors have enabled single-electron resolution and threshold for the first time. These low thresholds significantly enhance detector resolution to well-motivated, but unconstrained, sub-GeV dark matter models. Following an overview of these experimental techniques in silicon and germanium detectors, I will focus on one...
Recent measurements of rare SM Higgs boson decays will be presented.
Recently, jet measurements in DIS events close to Born kinematics have been proposed as a new probe to study transverse-momentum-dependent (TMD) PDFs, TMD fragmentation functions, and TMD evolution. We report measurements of lepton-jet momentum imbalance and hadron-in-jet correlations in high-$Q^2$ DIS events collected with the H1 detector at HERA. The jets are reconstructed with the kT...
The electric dipole moment (EDM) of the neutron is a strong probe of CP violation beyond the Standard Model.
In particular, its value could reveal information on baryogenesis.
We report the latest result from the nEDM collaboration, which operates an experiment to measure the neutron EDM at the Paul Scherrer Institute
using Ramsey’s method of separated oscillating magnetic fields with...
Measurements of multiple electroweak bosons production at the LHC constitute an important test of the Standard Model. They are sensitive to the properties of electroweak-boson self-interactions and provide a test of the electroweak theory and of the perturbative quantum chromodynamics. In this talk, we present recent results from the ATLAS experiment for multi-boson production in...
Water Cherenkov detectors play a crucial role in the study of neutrinos, providing an affordable way to instrument enormous target masses. As neutrino experiments transition from discovery to precision measurement understanding the performance of these detectors becomes more and more important – in the latest T2K oscillation result the Super-Kamiokande detector uncertainty is the largest...
γ-ray bursts (GRBs) are transient cataclysmic events, whose role became central in the new multi-messenger era. In the present work I propose a novel investigation of the GRB emission mechanism, via time-resolved spectral analysis of the X-ray tails of bright GRB pulses observed with the XRT instrument onboard the Neil Gehrels Swift Observatory, discovering a unique relation between the...
The phenomenon of Neutrino Oscillation has been very well confirmed by a plethora of data; we are now entering a precision era in which the mixing angles and mass differences are going to be measured with unprecedented precision by ongoing and planned experiments. However, the new measurements could reveal that the standard three flavor scenario is not enough for a complete description of...
Recent CMS searches for Higgs Invisible decays will be presented.
The Calorimetric Electron Telescope (CALET) was launched on the International Space Station in 2015 and since then has collected a large sample of cosmic-ray charged particles over a wide energy. Thanks to a couple of layers of segmented plastic scintillators placed on top of the detector, the instrument is able to identify the charge of individual elements from proton to iron (and...
This talk reviews recent measurements of multiboson production using CMS data. Inclusive and differential cross sections are measured using several kinematic observables.
Plastic scintillator detectors are widely used in high-energy physics. Often they are used as active neutrino target, both in long and short baseline neutrino oscillation experiments. They can provide 3D tracking with 4$\pi$ coverage and calorimetry of the neutrino interaction final state combined with a very good particle identification, sub-nanosecond time resolution. Moreover, the large...
The $U_1$ leptoquark is the popular candidate to explain the persistent 𝐵-anomalies. In this talk, I will discuss the bounds which can be imposed on a $U_1$ leptoquark model using the latest LHC data. The current LHC data is quite sensitive towards the mass of $U_1$ and its couplings with the Standard Model second and third-generation fermions. I will discuss some simple scenarios with...
In this talk we present exploratory studies of the 3D gluon content of the proton, as a result of analyses on leading-twist transverse-momentum-dependent (TMD) gluon distribution functions, calculated in a spectator model for the parent proton. Our formalism embodies a fit-based parameterization for the spectator-mass density, suited to describe both the small and the moderate-x regime....
Studies of collisions of light systems, like O–O, are planned at the LHC [1]. In particular, the translation of initial collision geometry with alpha-clustering in O-16 to triangular modulation of elliptic flow is discussed [2,3]. To date there were no measurements, even at lower collision energies, which demonstrated such fine effects of radial flow. However, numerous measurements of...
The primary goal of the ultrarelativistic heavy-ion collision program at the LHC is to study the properties of the quark-gluon plasma (QGP), a state of strongly interacting matter that exists at high temperatures and energy densities. Anisotropic flow, studied using the anisotropy of the momentum distribution of final state particles, is sensitive to the transport properties (i.e., specific...
WIMPs at the TeV mass region or above experience long-range force effects, such as the existence of meta-stable bound state pairs (WIMPonium). These bound states contribute to the depletion of the relic abundance and therefore allow for even larger WIMP masses to compensate for the effect. In this talk, I present new next-to-leading order (NLO) zero and finite temperature corrections for...
I will give an overview of the relevant physics and the challenges of Galactic cosmic-ray transport. In particular, I will address recent developments in numerical modelling and physical developments on this field. Corresponding numerical models aim at reproducing cosmic-ray spectra and also diffuse gamma-ray emission from the Galaxy from high to very-high energies. For these numerical models...
Though the Belle experiment has stopped data taking more than a decade ago, new results on semileptonic $B$ meson decays are still being obtained. This is in part due to new experimental tools elaborated for Belle II applied to the Belle data set, such as the FEI (Full Event Interpretation) hadronic and semileptonic tag which enables new measurements of $B \to D^{*}\ell\nu$, $B \to...
The latest results on the production of Higgs boson pairs (HH) in the ATLAS experiment are reported, with emphasis on searches based on the full LHC Run 2 dataset at 13 TeV. In the case of non-resonant HH searches, results are interpreted both in terms of sensitivity to the Standard Model and as limits on kappa_lambda, i.e. a modifier of the Higgs boson self-coupling strength. Searches for new...
In the RHIC Beam Energy Scan program, gold nuclei are collided with different collision energies in the range from few to 62.4 GeV. The goals of the program are to explore the onset of QGP creation, locate the critical point of QCD and study dense baryon matter.
In this talk, we report on the first application of 3D Monte Carlo Glauber (GLISSANDO2) and TrENTO p=0 initial states for 3D...
Many new physics models, e.g., compositeness, extra dimensions, extended Higgs sectors, supersymmetric theories, and dark sector extensions, are expected to manifest themselves in the final states with leptons and photons. This talk presents searches in CMS for new phenomena in the final states that include leptons and photons, focusing on the recent results obtained using the full Run-II...
Recent CMS results on spectroscopy of heavy mesons and baryons are reported.
Precision determinations of $V_{ub}$ and $V_{cb}$ play a central role in precision tests of the CKM sector of the Standard Model and complement direct measurements of CP violation of B meson decays. In this talk, we present first studies towards measurements of $|V_{ub}|$ and $V_{cb}$, with semileptonic decays using collision events recorded at the $\Upsilon(4S)$ resonance by the Belle II...
Recent CMS results on HH, X->HH and X->HY production will be presented.
The propagation of extragalactic cosmic rays (EGCRs) in the Galactic magnetic field (GMF) plays a crucial role in understanding the CR signal measured at Earth. Particularly in understanding the transition region from Galactic cosmic rays (GCRs) to EGCRs ($ \approx 10^{15.5} \, {\rm eV} – 10^{18.5} \, {\rm eV}$), the GMF is expected to exhibit a range of effects on CRs as this energy range...
The Short-Baseline Near Detector (SBND) will be one of three liquid Argon Time Projection Chamber (LArTPC) neutrino detectors positioned along the axis of the Booster Neutrino Beam (BNB) at Fermilab, as part of the Short-Baseline Neutrino (SBN) Program. The detector is currently in the construction phase and is anticipated to begin operation in the second half of 2022. SBND is characterised...
A strongly-coupled sector can feature a supercooled confinement transition in the early universe. When fundamental quanta of the strong sector are swept into expanding bubbles of the confined phase, the distance between them is large compared to the confinement scale. The flux linking the fundamental quanta then deforms and stretches towards the wall, producing an enhanced number of composite...
The Higgs trilinear coupling provides a unique opportunity to probe the structure of the Higgs sector and the nature of the electroweak phase transition, and to search for indirect signs of New Physics. Classical scale invariance (CSI) is an attractive concept for BSM model building, explaining the apparent alignment of the Higgs sector and potentially relating to the hierarchy problem. A...
Extragalactic sources are thought to be the origin of the highest energy cosmic rays detected at Earth. In this work, we explore energy-dependent mass compositions of these sources taking a subset of the VCV catalog for distances shorter than z=0.6. We use a power-law spectrum with an exponential cutoff to model individual sources above 10$^{18}$ eV. To be more realistic we use the individual...
The ICARUS collaboration employed the 760-ton T600 detector in a successful three-year physics run at the underground LNGS laboratories studying neutrino oscillations with the CNGS neutrino beam from CERN, and searching for atmospheric neutrino interactions. ICARUS performed a sensitive search for LSND-like anomalous νe appearance in the CNGS beam, which contributed to the constraints on the...
A Higgs factory is considered the highest-priority next collider in the EPPSU 2020 strategy update. Two linear colliders projects, the International Linear Collider (ILC) and the Compact Linear Collider (CLIC), currently under study are among the candidates being considered. Although the linacs accelerating the particles use different RF technologies they share similar challenges, for example...
The nature and origin of dark matter are among the most compelling mysteries of contemporary science. For over three decades, physicists have been trying to detect dark matter particles via collisions on target nuclei. Noble gases, in particular Xenon, have demonstrated leading sensitivities to WIMP-type dark matter due to their excellent radiopurity, chemical inertness, self-shielding, and...
The increase of the particle flux (pile-up) at the HL-LHC with instantaneous luminosities up to L ~ 7.5 × 10$^{34}$ cm$^{-2}s^{-1}$ will have a severe impact on the ATLAS detector reconstruction and trigger performance.
The end-cap and forward region where the liquid Argon calorimeter has coarser granularity and the inner tracker has poorer momentum resolution will be particularly affected....
In this contribution, we present the latest measurements of $\Lambda^{+}_{\rm c}$, $\Xi^{+,0}_{\rm c}$, $\Sigma^{0,++}_{\rm c}$, and the first measurement of $\Omega^{0}_{\rm c}$ baryons performed with the ALICE detector at midrapidity in pp collisions at $\sqrt{s}$ = 5.02 and 13 TeV. Recent measurements of charm-baryon production at midrapidity by the ALICE Collaboration in small systems show...
New physics may have gone unseen so far due to it being hidden in a dark sector. This may result in a rich phenomenology which we can access through portal interactions. In this talk, we present recent results from dark-sector searches in CMS using the full Run-II data-set of the LHC.
Determinations of the CKM matrix elements $|V_{ub}|$ and $|V_{cb}|$ or predictions for $R$-ratios testing lepton flavor universality can be obtained from form factors describing exclusive semileptonic $B_{(s)}$ decays. Using the framework of lattice quantum chromodynamics, we report on our form factor calculations for $B_s\to D_s \ell\nu$, $B_s\to K \ell\nu$, and $B\to \pi\ell \nu$ decays....
We propose a new model for a homogeneous description of hadron-hadron and hadron-nucleus collisions, the Gluon Exchange Model (GEM). While technically our model can be regarded as a generalization of the Dual Parton Model by Capella and Tran Thanh Van, it is fundamentally based on the number of exchanged color octets (gluons) and significantly extends the Fock space of states available for the...
The propagtion of cosmic rays can be described by diffusive motion in most galactic enviroments. Therfore, a detailed knowlege of the diffusion tensor is necessary. Recent analyses of the energy dependence of the diffusion tensor show a function of the turbulence level $b/B$, i.e. $\kappa_i \propto E^{\gamma_i}$ with $\gamma_i = \gamma_i(b/B)$, where $i\in \{\parallel, \perp\}$. (Reichherzer...
In this talk I will discuss computations of NLO virtual corrections to
four-point gluon-fusion processes; in particular the production of HH,
ZH and ZZ. Recently these processes have been computed numerically, but
they are not known analytically. I will discuss how one can perform an
expansion of these amplitudes in the high-energy limit, and improve the
resulting series through the use...
Scenarios of strongly interacting dark matter, where confinement in a new non-abelian dark sector leads to composite dark matter candidate are increasingly at the focus of LHC searches. These scenarios where bound state masses are low compared to the LHC scale lead to exotic darkjet signatures such as semi-visible, emerging jets. With the example of an SU(Nd) gauge group, we present the impact...
Although the charmonium spectrum seems to be well investigated, charmonia can still be used as benchmarks to test our QCD predictions, as these states lay in the transition region between perturbative and non-perturbative QCD.Despite the need for experimental confirmations, setbacks arise from limited statistics because of the production processes of all non-vector states. The
properties and...
The MIP Timing Detector (MTD) of the Compact Muon Solenoid (CMS) will provide precision timestamps with 40 ps resolution for all charged particles up to a pseudo-rapidity of |η|=3. This upgrade will mitigate the effects of pile-up expected under the High-Luminosity LHC running conditions and bring new and unique capabilities to the CMS detector. The endcap region of the MTD, called the Endcap...
The SuperKEKB electron-positron collider is being commissioned at KEK to study a new physics in the B-meson decays. In order to accomplish the target, the luminosity of 8 x 10$^{35}$ cm$^{-2}$s$^{-1}$ is necessary. We have applied a novel “nano-beam scheme” to squeeze the beta function at the interaction point (IP) down to 1 mm in the vertical, 60 mm in the HER and 80 mm in the LER in the...
In Heavy Quark Effective Theory (HQET), measured $B \to D^{(*)} \ell \bar \nu_\ell$ decay rates for light leptons constrain all $B \to D^{(*)}$ semileptonic form factors, both in and beyond the Standard Model (SM). We update our prior HQET-based analysis, carrying out a global fit including newly available measurements of $B \to D^{(*)} \ell \bar \nu_\ell$ decay distributions to predict: the...
The production of Higgs pairs is one of the most anticipated channels to access at the High-Luminosity LHC. It allows for a measurement of the Higgs trilinear self-interaction. In this work we investigate the possibility to probe the Higgs trilinear coupling through the decomposition of the Higgs pair production into channels based on their topologies. We use interpretable machine learning...
Precision hadron spectroscopy helps in understanding how the matter is made around us. The large data sample accumulated by the Belle experiment at the KEKB asymmetric-energy $e^{+}e^{-}$ collider provides us a unique opportunity to perform these studies. We report recent results on charmed baryon spectroscopy from Belle, which include a study on the spin and parity of $\Xi_{c}(2970)$ and...
The semileptonic b-hadron decays with a heavy lepton are sensitive to new couplings like those generated by charged Higgses or Leptoquarks. The B-Factories and LHCb have previously performed various measurements of these decays, using different approaches and techniques. A global average of these measurements shows a discrepancy with the Standard Model expectations, which is above 3 standard...
The next generation of high energy physics colliders call for major advances in tracking detector technology. In order to cope with the increasingly demanding specifications of HEP experiments an extensive R&D program has been underway within the RD50 Collaboration to develop timing silicon sensors with sufficient radiation tolerance for HL-LHC trackers and beyond. The critical areas of...
Pseudo-Nambu-Goldstone bosons (pNGBs) are attractive dark matter (DM) candidates since they are coupled to the Standard Model (SM) predominantly through derivative interactions. Thereby, they naturally evade the strong existing limits inferred from DM direct detection experiments. Working in an effective field theory that includes both derivative and non-derivative DM-SM operators, we perform...
The KM3NeT international collaboration has started to build two underwater neutrino telescopes, located in two deep sites of the Mediterranean Sea. ARCA (Astroparticle Research with Cosmics in the Abyss) in its final configuration will instrument 1 Gton of seawater, using more than 100,000 PMTs with a 3” diameter. ARCA is optimised to detect cosmic neutrinos within an energy range of 1 TeV –...
The latest results from DEAP-3600 will be presented. DEAP-3600 is a single-phase liquid argon (LAr) dark matter detector operating 2 km underground at SNOLAB in Sudbury, Canada. The detector consists of 3.3 tonnes of LAr in a spherical acrylic vessel viewed by an array of 255 photomultiplier tubes. DEAP-3600 has been taking data stably since November 2016. Background events that...
Searches for pairs of Higgs bosons will be, in all likelihood, the best tools to precisely measure the Higgs boson self-coupling $\lambda_{hhh}$ in future colliders. We study various strategies for the $hh\to b \bar{b} b \bar{b}$ search in the HL-LHC era with focus on constraining $\lambda_{hhh}$. We implement a machine-learning-based approach to separate signal and background and apply...
We derive limits on millicharged dark states, as well as particles with electric or magnetic dipole moments, from the number of observed forward electron scattering events at the Big European Bubble Chamber in the 1982 CERN-WA-066 beam dump experiment. The dark states are produced by the 400 GeV proton beam primarily through the decays of mesons produced in the beam dump, and the lack of...
Ultra-luminous infrared galaxies (ULIRGs) have total infrared luminosities that exceed $10^{12}$ solar luminosities, making them the most luminous objects in the infrared sky. They are mainly powered by starbursts with star-formation rates exceeding 100 solar masses per year, with a possible secondary contribution from an active galactic nucleus (AGN). Both starburst regions and AGN are...
One of the great challenges in the next generation of experiments at the future high-luminosity particle colliders will be the event reconstruction, as the large number of interactions occurring at each bunch crossing will create very large occupancies in the innermost detectors. In many of the studies performed for their upgrades, LHC experiments have showed that the addition of track timing...
An important task at future colliders is the investigation of the Higgs-boson sector. Within the framework of the $CP$ conserving Two Higgs Doublet Models (2HDM) type I and II we investigate the allowed ranges for all triple Higgs couplings involving at least one light, SM-like Higgs boson. We will define and explore some benchmark planes that show large values of triple Higgs couplings, still...
The Belle II experiment at the SuperKEKB energy-asymmetric $e^+ e^-$ collider is an upgrade of the B factory facility at KEK in Tsukuba, Japan. The experiment began operation in 2019 and aims to record a factor of 50 times more data than its predecessor. Belle II is uniquely capable of studying the so-called "XYZ" particles: heavy exotic hadrons consisting of more than three quarks. First...
The long standing discrepancy between determinations of the CKM matrix element Vub obtained from exclusive and inclusive semileptonic B decays are at the level of 2-3 standard deviations. This discrepancy continues to challenge our understanding of the semileptonic decays on both the theoretical and experimental sides. Exclusive semileptonic Bs decays are in principle under good theoretical...
Searches for heavy neutral lepton production in K+ --> e+N and K+ --> mu+N decays using the data set collected by the NA62 experiment at CERN in 2016-18 are presented. Upper limits on the elements of the extended neutrino mixing matrix $|U_{e4}|^2$ and $|U_{\mu4}|^2$ are established at the levels of $10^{-9}$ and $10^{-8}$, respectively, improving on the earlier searches for heavy neutral...
Installed at about 2500 m under the Mediterranean Sea, in front of the southern French coast, the ANTARES detector is the first undersea neutrino telescope and has been collecting data since 13 years in its final configuration. Its main scientific goal is the search for astrophysical high energy neutrinos, either coming from resolved sources, or as a diffuse excess of very high energy events,...
Neutrino oscillations in matter provide a unique probe of new physics. Leveraging the advent of neutrino appearance data from NOvA and T2K in recent years, we investigate the presence of CP-violating neutrino non-standard interactions in the oscillation data. We first show how to very simply approximate the expected NSI parameters to resolve differences between two long-baseline...
We formulate Positivity Bounds for scattering amplitudes including exchange of gravitons in four dimensions. We generalize the standard construction through dispersion relations to include the presence of a branch cut along the real axis in the complex plane for the Maldestam variable s. In general, validity of these bounds require the cancellation of divergences in the forward limit of the...
The measurement of Higgs boson production in association with one or two top quarks is essential to understand the top-quark couplings to the Higgs boson. This talk presents the analyses using Higgs boson into several final states, using pp collision data collected at 13 TeV.
LHCb is a spectrometer that covers the forward region of proton-proton collisions, corresponding to the pseudo-rapidity range 2<eta<5. In this unique phase space, LHCb can perform tests of perturbative and non-perturbative QCD models, by studying the production of heavy flavor quarks, like charm and top quarks. In this context the production of a Z boson in association with a c-jet can be...
Heavy QCD axion models are motivated by the so-called "quality problem", the sensitivity of the QCD axion to misaligned contributions to its potential.
In this talk I will show that despite the absence of axion relics today, these models can generically produce a large amount of gravitational waves, a non-vanishing theta angle and, in some cases, both signals simultaneously.
Therefore, I...
Calculations of Drell-Yan production at next-to-leading (NLO) order have been combined with transverse Momentum Dependent (TMD) distributions obtained with the Parton Branching (PB). For the first time, the predictions show a remarkable agreement with DY measurements across a wide range of DY mass and center of mass energies, from experiments like NuSea, R209, Phenix, CMS and ATLAS....
NA61/SHINE is a multipurpose fixed-target facility at the CERN Super Proton Synchrotron. The main goals of the NA61/SHINE strong-interactions program are to discover the critical point of strongly interacting matter as well as to study the properties of produced particles relevant for the study of the onset of deconfinement - the transition between the state of hadronic matter and the...
The Pixel Luminosity Telescope is a silicon pixel detector dedicated to luminosity measurement at the CMS experiment. It consists of 48 silicon sensor planes arranged into 16 "telescopes" of three planes each, with eight telescopes arranged around the beam pipe at either end of the CMS detector, outside the pixel endcap at a distance of approximately 1.75 m from the interaction point. The...
The question whether the Higgs boson is connected to additional CP violation is one of the driving forces behind precision studies at the Large Hadron Collider. In this work, we investigate the CP structure of the top quark Yukawa interaction---one of the most prominent places for searching for New Physics---through Higgs boson loops in top quark pair production. We calculate the electroweak...
In this talk, after reviewing the concept of quantum breaking, and its relation to scrambling, concepts which proved fundamental for our understanding of composite systems such as condensates, black holes and De Sitter, I will show how to study them within the context of 2PI effective action. To do so I will focus on a simple model of a one dimensional condensate in which a logarithmic...
The high-luminosity upgrade of the LHC (HL-LHC) is foreseen to reach an instantaneous luminosity a factor of five to seven times the nominal LHC design value. The resulting, unprecedented requirements for background monitoring and luminosity measurement create the need for new high-precision instrumentation at CMS, using radiation-hard detector technologies. This contribution presents the...
Flavor-dependent long-range leptonic force mediated by an ultralight and neutral
gauge boson $Z'$ associated with $L_\mu -L_\tau$ symmetry constitutes a minimal
extension of the Standard Model. We study the physical consequences of such
long-range force in the oscillation of terrestrial neutrinos, particularly in $\nu_\mu$ survival channel. We show that the proposed atmospheric neutrino...
The CP structure of the Higgs boson in its coupling to the particles of the Standard Model is amongst the most important Higgs boson properties which have not yet been constrained with high precision. In this study, all relevant inclusive and differential Higgs boson measurements from the ATLAS and CMS experiments are used to constrain the CP-nature of the top-Yukawa interaction. The model...
One of the key ingredients to do good science is the embrace of diversity in all its facets. The LGBTQ+ community faces extra burdens in our daily lives as scientists, making us less likely to stay in academia and achieve visible positions within large experiments.
The LGBTQ CERN group is a CERN-recognized Informal Network seeking to provide a welcoming space for lesbian, gay, bisexual,...
We explore the ability of future cosmological surveys to put constraints on string theory, through the Swampland program. String theory is sometimes thought to be unfalsifiable due to the incredibly large amount of low energy effective versions that can be derived in its framework. However, it is well known that constructing consistent solutions in a de-Sitter background is tremendously...
Long-lived particles have become a new frontier in the exploration of physics beyond the Standard Model. In this paper, we present the implementation of four types of long-lived particle searches, viz. displaced leptons, disappearing track, displaced vertex (together with muons or with missing energy), and heavy charged tracks. These four categories cover the signatures of a large range of...
Heavy-flavored emissions have been always considered as an excellent channel to test properties of Quantum chromodynamics (QCD) at present and future colliders. Among different regimes, in which heavy-flavor production can be investigated, we focus our attention on the semi-hard one, where $s>>Q^2>>\Lambda_{QCD}$ (s is the squared center-of-mass energy, $\{Q^2\}$ a (set of) hard scale(s)...
In this work we study long-lived light mediators which are well-motivated for connecting the dark sector with standard model particles. Experiments like ATLAS and CMS have placed strong bounds on heavy mediators with prompt decay, however the landscape of light long-lived mediators needs attention. Current experimental constraints have pushed the allowed mixing with the SM Higgs boson for...
The Belle II experiment at the asymmetric $e^+e^-$ collider, SuperKEKB, aims to record 50 ab$^{-1}$ of data over the next decade, a factor of 50 more than Belle. During the first 1.5 years of operations, around 90 fb$^{-1}$ of data were collected. This dataset is used to measure the lifetimes of a few charm hadrons, confirming the expected performance of the Belle II detector, in particular...
In the usual approach to the determination of the dark matter thermal relic abundance an assumption of local thermal equilibrium is made. In this talk I will discuss how to go beyond this assumption and introduce DRAKE — a numerical precision tool that can trace not only the DM relic density, but also its velocity dispersion and full phase space distribution function. I will review the general...
We present results on the encounter of two black holes that are initially on a hyperbolic-like orbit simulated with the numerical relativity code SpEC.
The two black holes either become bound due to the emission of gravitational waves or they escape to infinity. We present trajectories and waveforms for both cases and extract the scattering angle for the latter.
The muon campus program at Fermilab includes the Mu2e experiment that will search for a charged-lepton flavor violating processes where a negative muon converts into an electron in the field of an aluminum nucleus, improving by four orders of magnitude the search sensitivity reached so far.
Mu2e’s Trigger and Data Acquisition System (TDAQ) uses {\it otsdaq} as its solution. Developed at...
Thanks to its high luminosity and center of mass energy, the future FCC-hh collider will allow us to probe processes with clean but rare final states that are unaccessible at the LHC. The study of diboson production processes poses a promising way of indirectly constraining New Physics in the context of the Higgs Boson. Specifically, the diphoton leptonic decay channels of the Wh and Zh...
MicroBooNE is an 85-ton active mass liquid argon time projection chamber (LArTPC) at Fermilab. Its excellent calorimetry and resolution, along with its exposure to two neutrino beam lines (BNB and NuMI) make it a powerful detector not just for neutrino physics, but also for Beyond the Standard Model (BSM) physics and astroparticle physics. The experiment has competitive sensitivity to heavy...
The creation of scientific knowledge has transitioned from largely solitary work to collective efforts embedded in large collaborations, placing a new emphasis on social networks as the mechanism linking interdependent scientists across departments and universities. Professional networks have proven to be a key contributor in the career success and their presence becomes even more important...
The large data sample of high-multiplicity pp collisions collected by ALICE allows for the precise measurement of the size of the source producing primary hadrons, opening the door to the study of the interaction of different hadron species using femtoscopy techniques. The momentum correlation between (anti)protons and (anti)deuterons measured in pp collisions at $\sqrt{s}=$ 13 TeV with ALICE...
The high-energy tails of charged- and neutral-current Drell-Yan (DY) processes provide important constraints on the light quark and anti-quark parton distribution functions (PDFs) in the large-x region. On the other hand, a hypothetical short-distance new physics would smoothly distort the high-energy tails as described by the Standard Model Effective Field Theory (SMEFT). In this work, we...
$K_L \to \pi \nu \nu $ is one of the attractive processes to test new physics beyond the Standard Model (SM). It is drawing attention, thanks to the effort of the KOTO collaboration. In this talk, we briefly study the $K_L$ decay and other relevant flavor violating processes in a class of type-II two Higgs doublet models with extra gauged $U(1)_H$ symmetry. We sort few examples where the...
We study axion effective field theories (EFTs), with a focus on axion couplings to massive chiral gauge fields. We investigate the EFT interactions that participate in processes with an axion and two gauge bosons, and we show that, when massive chiral gauge fields are present, such interactions do not entirely originate from the usual anomalous EFT terms. When applied to the case of the...
The Belle II collaboration has over 1000 people from institutions in 26 countries working together to achieve its physics goals. The collaboration is committed to fostering an open, diverse, and inclusive environment, and created a diversity office to raise awareness of diversity and inclusion issues, promote an inclusive atmosphere within the collaboration, provide a safe and confidential...
The Universe is homogeneous and isotropic on large scales, so on those scales it is usually modelled as a Friedmann-Lemaître-Robertson-Walker (FLRW) space-time. The non-linearity of the Einstein field equations raises concern over averaging over small-scale deviations form homogeneity and isotropy, with possible implications on the applicability of the FLRW metric to the Universe, even on...
Models of Lorentz-violating gravity can provide a solution to the puzzle of quantum gravity. By abandoning boost invariance, we can formulate theories which are renormalizable and even asymptotically free in certain cases. At low energies, certain amount of Lorentz violation persists and can percolate onto physical observables, such as the emission rate of gravitational waves from a bounded...
Non-thermalized dark matter is a cosmologically valid alternative to the paradigm of weakly interacting massive particles. For dark matter belonging to a $Z_2$-odd sector that also contains a thermalized mediator particle, dark-matter production proceeds via both the freeze-in and super-WIMP mechanism. We highlight their interplay and study the evolution of the resulting dark-matter...
The FASER$\nu$ detector at the LHC has been designed to study neutrinos at the highest man-made energies. The detector will be located 480 m downstream of the ATLAS interaction point, and will take data starting in 2022. With FASER$\nu$, the three-flavor neutrino cross-sections will be measured in the currently unexplored energy range between 360 GeV and 5 TeV. In particular, tau-neutrino and...
After the current LHC shutdown (2019-2022), the ATLAS experiment will be required to operate in an increasingly harsh collision environment. To maintain physics performance, the ATLAS experiment is undergoing a series of upgrades. A key goal of this upgrade is to improve the capacity and flexibility of the detector readout system. To this end, the Front-End Link eXchange (FELIX) system has...
The existence of a mass gap between the Standard Model (SM) and possible new states encourages us to use effective field theories. Here we consider the non-linear realization of the electroweak symmetry breaking: the electroweak effective theory (EWET), also known as Higgs effective field theory (HEFT) or electroweak chiral Lagrangian (EWChL). At short distances a resonance Lagrangian which...
The energy densities reached in high-energy hadronic collisions at the LHC allow significant production of light (anti)nuclei. Their production yields have been measured as a function of $p_{\mathrm{T}}$ and charged-particle multiplicity in different collision systems and at different center-of-mass energies by ALICE. One of the most interesting results obtained from such a large variety of...
We report the observation of the rare charm decay $D^0 \to K^-\pi^+e^+e^-$, a search for nine lepton-number-violating and three lepton-flavor-violating neutral charm decays of the type $D^0 \rightarrow h^- h^{'-} \ell^+ \ell^{'+}$, and $D^0 \rightarrow h^- h^{'+} \ell^+ \ell^{'-}$, and a search for seven lepton-number-violating decays of the type $D^{0}\rightarrow X^{0} e^{\pm} \mu^{\mp}$,...
We confront the Minimal Supersymmetric Standard Model (MSSM) with the recent measurement of (g-2)_mu, the Dark Matter (DM) relic density, DM direct detection limits and electroweak SUSY searches at the LHC. We demonstrate that various distinct regions of the parameter space can fulfill all experimental constraints. We present predictions for future pp and e+e- colliders to explore these regions.
The ATLAS Open Data project aims to deliver open-access resources for education and outreach in High Energy Physics and related computer sciences. Because the resources -data, software and documentation-target students and instructors, they must be tested by students and instructors before being released. One of the most effective production ways we have found is to promote on-site and remote...
The nature of the GeV gamma-ray Galactic center excess (GCE) in the data of Fermi-LAT is still under investigation. Different techniques, such as template fitting and photon-count statistical methods, have been applied in the past few years in order to disentangle between a GCE coming from sub-threshold point sources or rather from diffuse emissions, such as the dark matter annihilation in the...
Galaxy formation in the first billion years mark a time of great upheaval in the history of the Universe: as the first sources of light, these galaxies ended the 'cosmic dark ages' and produced the first photons that could break apart the hydrogen atoms suffusing all of space starting the process of cosmic reionization. As the earliest building blocks, the galaxies that formed in the first...
The gravitational-wave ringdown from black holes gives us direct access to the nature of space-time around them. Thus ringdown signals have the potential to shed some light on the quantum nature of black hole space-times. We present an observational investigation of the hypothesis that the black hole area is quantised in multiples of the Planck area. This hypothesis relies on a...
To maximize the physics reach, the LHC plans to increase its instantaneous luminosity to $7.5\times10^{34}$cm$^{-2}$s$^{-1}$, delivering from 3 to 4 ab$^{-1}$ of data at $\sqrt{s}=$14TeV. In order to cope with this operation condition, the ATLAS detector will require new sets of both front-end and back-end electronics. A new trigger and DAQ system will also be implemented with a single-level...
We calculate fermion-loop corrections to high energy $W^+W^-$ scattering in the context of a Strongly Interacting Electroweak Symmetry Breaking Sector (EWSBS) using Higgs Effective Field Theory(HEFT). We test the assumption that these corrections are negligible when compared to the boson-loop ones, as it is commonly taken for granted in the literature. While this is correct in most cases, we...
The Fermilab Muon $g-2$ experiment reported the results of its Run-1 measurement of the anomalous magnetic moment $a_\mu^{\textrm{FNAL}}$, which is in full agreement with the previous BNL measurement and pushes the world average deviation $\Delta a_\mu^{\text{2021}}$ from the Standard Model to a significance of $4.2\sigma$. In this talk I will present an extensive survey of its impact on...
LHCb is a collaboration of over 1300 members from 83 institutions based in 19 countries, and representing many more nationalities. We aim to work together on experimental high energy physics, and to do so in the best and most collaborative conditions. The Early Career, Gender & Diversity (ECGD) office exists to support this goal, and in particular has a mandate to support early-career (EC)...
Dark Matter (DM) constitutes most of the matter in the presently accepted cosmological model for our Universe. However, despite the increased sensitivity of direct and indirect DM searches, and the latest LHC run at 13 TeV centre of mass energy, no signal from DM particles has been detected so far, leading to exclusion limits on the parameter space of DM models. Conventional indirect searches...
The possibility of new physics in terms of lepton number violating (LNV) interactions is intriguing out of various reasons: LNV could be tightly linked to the generation of neutrino masses of Majorana nature while at the same time having direct implications for the generation of the baryon asymmetry of our Universe. The $K \rightarrow \pi \nu \bar{\nu}$ decay is one of the most promising modes...
Due to the quantum origin of primordial perturbations, the early universe is an ideal setup for the interplay between gravity, quantum physics and thermodynamics. In this talk I will discuss results and ongoing work on the role that mutual information between distant regions play in cosmology.
In September 2020, Advanced LIGO-Virgo reported a short gravitational-wave signal (GW190521) interpreted as a quasi-circular merger of black holes, one at least populating the pair-instability supernova gap. In this talk I will show that GW190521 is consistent with numerically simulated signals from head-on collisions of two (equal mass and spin) horizonless vector boson stars (aka Proca...
Recent precise determination of the electron anomalous magnetic moment (AMM) adds to the longstanding tension of the muon AMM and together strongly point towards physics beyond the Standard Model. Here we present a solution to both anomalies via a light scalar that emerges from a second Higgs doublet and resides in the $\mathcal{O}(10)$-MeV to $\mathcal{O}(1)$-GeV mass range. A scalar of...
The decay K^+→π^+ νν ̅, with a very precisely predicted branching ratio of less than 〖10〗^(-10), is among the best processes to reveal indirect effects of new physics. The NA62 experiment at CERN SPS is designed to study the K^+→π^+ νν ̅ decay and to measure its branching ratio using a decay-in-flight technique. NA62 took data in 2016, 2017 and 2018, reaching the sensitivity of the Standard...
"In this talk I’ll talk about truncation errors in the Stadard Model Efftective Field Theory (SMEFT) paradigm — meaning errors from higher terms in the EFT expansion. The main tool I’ll use to tackle this type of uncertainty is special operator basis called the “Geometric SMEFT”, or geoSMEFT. I will explain the benefits of the geoSMEFT basis and go through some preliminary studies of the...
With a unique geometry covering the forward rapidity region, the LHCb detector provides unprecedented kinematic coverage at low x for charged particles in hadron collisions. The excellent momentum resolution, vertex reconstruction, and particle identification allows precision measurements down to very low pT. This talk will present recent LHCb measurements of prompt charged hadron production...
In my talk I will present a model-independent analysis of the magnetic and electric dipole moments of the muon and electron. The expressions for the dipole moments are given in terms of operator coefficients of the low-energy effective field theory (LEFT) and the Standard Model effective field theory (SMEFT). One-loop renormalization group improved perturbation theory, including the one-loop...
KLOE-2 experiment at the upgraded e+e- DAΦNE collider of the INFN Laboratori Nazionali di Frascati collected about 5 fb$^{-1}$ at the center of mass energy of the $\phi$-meson. Together with the data set of its predecessor (KLOE) the total acquired data sample of 8 fb$^{-1}$ corresponds to 2.4$\times$10$^{10}$ $\phi$-meson produced, which is the largest sample ever collected at the...
Information about the mass spectrum of compact stars can be used to infer cosmological parameters from gravitational waves (GW) in the absence of redshift measurements obtained from electromagnetic (EM) observations. This method will be fundamental in measuring and testing cosmology with GWs for current and future ground-based GW detectors where the majority part of sources are detected...
Neutrino telescopes perform an indirect search for dark matter (DM) through its annihilation into standard model channels yielding neutrinos, for a broad range of WIMP masses. The ANTARES telescope, anchored to the Mediterranean seabed at a depth of about 2500 m, looks for a DM signal from two promising sources with high WIMP density: the Galactic Center and the Sun. We present the latest...
Self-interaction among the neutrinos in the early Universe has been proposed as a solution to the Hubble tension, a discrepancy between the measured values of the Hubble constant from CMB and low-redshift data. However, flavor-universal neutrino self-interaction is highly constrained by BBN and several laboratory experiments such as, tau and K-meson decay, double-neutrino beta decay etc. In...
The best camera is the one you have on you.
In this tutorial, I will discuss how to use a smart phone to communicate your work with a remote audience using the inbuilt camera to produce still images and video content. This can then be edited, if needed, and shared on various social media platforms. Alternatively you can use your phone to directly live-stream and interact with your audience...
We present two works which study global properties of EFT descriptions of physics beyond the Standard Model (BSM).
The first, based on arXiv:2008.08597, considers what BSM physics is amenable to a decoupling SMEFT description. The four scalar degrees of freedom of the Standard Model, the Higgs and the longitudinal components of the Ws and Z, can be viewed one of two ways: "SMEFT" wraps them...
The LHCb experiment collected the world's largest sample of charmed hadrons during LHC Run 1 and Run 2. With this data set, LHCb is currently providing the world's most precise measurements of properties and production of known charmed baryons, as well as discovering many previously unobserved states. The latest results from the LHCb Collaboration on charmed baryons are presented.
Second stage of high-level trigger at the LHCb, deployed on a CPU server farm, not only selects events but performs an offline-quality alignment and calibration of the detector and uses this information to allow physics analysts to deploy essentially their full offline analysis level selections (including computing isolation, flavour tagging, etc) at the trigger level. This “real time...
The existence of dark matter (DM) has been well-established by repeated experiments probing various length scales. Even though DM is expected to make up 85% of the current matter content of the Universe, its nature remains unknown. Numerous methods have been developed to search for DM—both directly by looking for excess energy created in DM interaction with normal matter and indirectly by...
The detection of gravitational waves from extreme-mass-ratio inspirals (EMRIs) with upcoming space-borne detectors will allow for unprecedented tests of general relativity in the strong-field regime. Aside from assessing whether black holes are unequivocally described by the Kerr metric, they may place constraints on the degree of spacetime symmetry. Depending on exactly how a hypothetical...
In this talk, we present a reconstruction of the neutrino mass as a function of redshift, $z$, from current cosmological data using both standard binned priors and linear spline priors with variable knots. Using Planck 2018 cosmic microwave background temperature, polarization and lensing data, in combination with distance measurements from baryonic acoustic oscillations and supernovae, we...
Early in 2020, as the Covid-19 pandemic started to hit Europe, scientific outreach and education had to face a new challenge: finding rapidly new ways to engage general public and students. Social media were found to be a useful tool to achieve this goal: thousands of people could be reached directly at home with a few clicks by using a laptop or a mobile phone.
In this talk, it will be...
We present an extensive global interpretation of Higgs, diboson, and top quark production and decay measurements from the LHC in the framework of the Standard Model Effective Field Theory (SMEFT) at dimension six. We constrain simultaneously 36 independent directions in its parameter space, and compare the outcome of the global analysis with that from individual and two-parameter fits. Our...
In this work, we provide a simple model in order to compute the probability to obtain a given hierarchy between two scales. In particular, we work in a model with a given gauge symmetry and two scalar doublets. By the Coleman-Weinberg mechanism, the gauge bosons and scalars obtain different masses, corresponding to the light and heavy sectors. We analyze the mass ratio of these sectors in...
LHCb has collected the world's largest sample of charmed hadrons. This sample is used to measure $D^0 -\overline{D}^0$ mixing and to search for $C\!P$ violation in mixing and interference. New measurements from several decay modes are presented, as well as prospects for future sensitivities.
Recently studies of the heavy J/ψ and D-mesons by ALICE and STAR collaborations revealed a pronounced dependence of the cross-section on multiplicity of co-produced charged particles, and one of the possible explanations of this phenomenon is the enhanced contribution of multipomeron configurations. In this talk we present our theoretical results for the production of P-wave quarkonia (χ_c...
With the onset of the COVID pandemic in 2020 all outreach and educational activities with in-person participation had to stop. The ALICE Collaboration adapted to the new situation and continued reaching out to the public using the multitude of online tools and platforms available. We will focus here on two of our main outreach activities, virtual visits and masterclasses.
With the...
Recent results from the proton-proton collision data taken by the ATLAS experiment on the charmonium production and on the B_c production and decays will be presented. The measurement of J/psi and psi(2S) differential cross sections will be reported as measured on the whole Run 2 dataset. The measurement of the differential ratios of the B_c+ and B+ production cross sections at 8 TeV will also...
Hawking's calculation of particle production by a black hole is based on the semi-classical approximation, in which back-reaction on the metric is not taken into account. This leaves open the question of how the black hole evolves as a result of evaporation. In an attempt to answer it, we construct a simple analogue system, which shares the information storage properties of a black hole such...
Thanks to the large amount of data that is being and will be collected at Run-III and High Luminosity (HL) stage, precision measurements at the LHC are reaching an unprecedented level of statistical accuracy, whilst PDF uncertainties prevail. We study the impact of future measurements of lepton-charge and forward-backward asymmetries on PDF determination. The numerical results have been...
The GERDA (GERmanium Detector Array) collaboration operated high-purity Ge detectors enriched in $^{76}$Ge at LNGS to search for neutrinoless double beta decay ($0\nu\beta\beta$). An observation would imply both the Majorana nature of neutrinos and the violation of lepton number conservation, with important consequences for the neutrino mass scale, and the matter-antimatter asymmetry in the...
Third Observation (O3) run of Advanced LIGO and Advanced Virgo started in April 2019 and ended in March 2020; reaching sensitivities significantly better than those in the previous observing run. During this period, 56 gravitational-wave candidates were publicly released within hours of detection.
This talk will overview the published science results achieved during the O3 run, focusing on...
Jet identification tools are crucial for new physics searches at the LHC and at future colliders. We introduce the concept of Mass Unspecific Supervised Tagging (MUST) which relies on considering both jet mass and transverse momentum varying over wide ranges as input variables — together with jet substructure observables — of a multivariate tool. This approach not only provides a single...
The International Linear Collider (ILC) is a superconducting $e^+e^-$ collider with a centre-of-mass energy of 250GeV, upgradeable in in energy to 500GeV and beyond, and in luminosity by factors of 2 to 4. At 250GeV, it will run as a Higgs factory, the worldwide top priority in future HEP projects. It will be located in the Kitakami mountains in Japan’s Tohoku (northwest) region.
In 2020,...
The μ-RWELL is a Micro Pattern Gas Detector (MPGD) that inherits some of the best characteristics of existing MPGDs, like GEMs and MicroMegas, while simplifying the detector construction. It also significantly improves the spark protection by incorporating in the design a resistive layer on the anode board. The μ-RWELL [1] is composed of only two elements: the cathode, a simple FR4 PCB with a...
We report the results of a meta-analysis conducted to examine possible biases in the uncertainty values published in papers by the LHC experiments. Due to limited availability of computer readable data, we perform this analysis using custom developed python code that extracts the information from the vector graphics source files of the plots in the papers. The aim is to compute the percentages...
Recent results from the ATLAS experiment on searches and measurements on exotic heavy hadrons will be presented.
Studies of the pentaquarks with hidden charm in the Lambda_b decays in proton-proton collisions at 7 - 8 TeV will be discussed.
New results on the heavy tetraquarks in the Run 2 data at 13 TeV will also be reported.
Drell-Yan lepton pair production is a benchmark process at hadron colliders.
From the theoretical side, the inclusion of higher-order radiative corrections is mandatory
in order to match the experimental accuracy attainable at the LHC.
QCD radiative corrections are known up to order $\alpha^3_s$ for inclusive cross
sections and up to order $\alpha^2_s$ for differential observables; EW...
The observation of neutrinoless double-beta ($0\nu\beta\beta$) decay would unequivocally demonstrate that lepton number conservation is violated and that neutrinos are Majorana particles. Such a discovery would have profound consequences for particle physics and cosmology.
The Large Enriched Germanium Experiment for Neutrinoless $\beta\beta$ Decay (LEGEND) collaboration has been formed to...
A large, worldwide community of physicists is working to realise an exceptional physics program of energy-frontier, electron-positron collisions with the International Linear Collider (ILC). The International Large Detector (ILD) is one of the proposed detector concepts at the ILC. The ILD tracking system consists of a Si vertex detector, forward tracking disks and a large volume Time...
The CMS Collaboration is one of the largest scientific organizations ever assembled, with over 5000 active members from 229 institutes in 51 countries and regions. The goal of the CMS Diversity Office is to foster a working environment where all members of the Collaboration can thrive; ensuring the collaboration’s diverse and inclusive environment is essential for its continued success. In...
Core-collapse supernovae are fascinating astrophysical objects for multimessenger studies. Gravitational waves (GWs) are expected to play a role in the supernova explosion mechanism, but their modelling is also challenging due to the stochastic nature of the dynamics and the vast possible progenitors, and moreover, the GW detection from these objects is still elusive with the already advanced...
We find numerically static vortex solutions where the scalar and gauge fields have a non-singular profile under Einstein gravity in an AdS$_3$ background. Vortices with different winding numbers $n$, VEV $v$ and cosmological constant $\Lambda$ are obtained. These vortices have positive mass and are not BTZ black holes as they have no event horizon. The mass is determined in two ways: by...
Detector concepts are being developed for the foreseen electron-positron International Linear Collider (ILC) in Japan. The detectors are being optimized for precision physics in a range of energies between 90 GeV and 1 TeV. This talk will summarize the required performance of detectors, the proposed implementation and the readiness of different technologies needed for the deployment at ILC.
The latest results of time-dependent CP Violation in beauty meson decays to charmonia from LHCb are presented, including the CP violating mixing phase phis in Bs → JpsiPhi, using for the first time Jpsi → e+e- . Updates on the measurement of branching ratios are also reported.
We describe the outcome of a data challenge to detect signals of new physics at the LHC using unsupervised machine learning algorithms conducted as part of the Dark Machines Initiative and the Les Houches 2019 workshop on Physics at TeV colliders. We first define and describe a large benchmark dataset, consisting of $>1$ Billion simulated LHC events corresponding to 10 fb$^{-1}$ of...
The target precision for $W$-mass measurements at the LHC is around 0.1 permille, an extremely ambitious goal that requires exceptional theoretical control on vector boson production. I will present the results of a recent calculation of the mixed QCD $\times$ EW corrections to $W$ and $Z$ boson production. I will then discuss the impact of these corrections on the measurement of the $W$ boson...
Data analysis at the LHC has a very steep learning curve, which erects a formidable barrier between data and anyone who wants to analyze data, either to study an idea or to simply understand how data analysis is performed. To make analysis more accessible, we designed the so-called Analysis Description Language (ADL), a domain specific language capable of describing the contents of an LHC...
With the detection of binary black hole (BH) mergers from LIGO/Virgo we have opened up the field of gravitational wave astronomy and created a new window into the Universe. These discoveries bring new and independent information about how very massive stars end their life, and the final remnants they leave behind. In this talk I will discuss the stellar physics that goes into the formation of...
The problematic huge hierarchy between the usual 4-dimensional Planck mass scale of gravity and the ElectroWeak symmetry breaking scale can interestingly disappear at some point-like location along extra space-like dimensions where the effective gravity scale is reduced down to the TeV scale. Field theories with point-like particle locations (3-dimensional brane-worlds) or point-like...
We present the results of the recent study published in Phys.Rev.Lett. 126 (2021) 4, 041801, where the PDF uncertainty affecting the MW determination at the LHC is estimated keeping into account the full correlations information from the PDF at the level of the differential distribution used to extract $M_W$, namely $p_T^l$.
We find that keeping these correlations into account can reduce...
A muon collider has a great potential for particle physics giving the possibility to reach the high center-of-mass energy and luminosity of hadron colliders, with a greatly reduced pile up effect. However, a series of challenges arise mainly from the short muon lifetime and the Beam-induced Background. A complete simulation,based on CLIC’s ILCSoft software, is ongoing to understand the...
Im Universum muss es 6-mal mehr Materie geben, als die uns bekannte aus Atomen aufgebaute Materie, besagen einhellig alle astrophysikalischen und kosmologischen Messungen: Über 80% der Materie im Universum ist eine uns unbekannte neue Form von Materie, die wir "Dunke Materie" nennen. So ist unsere Galaxie, die Milchstraße, von einem Halo...
The most promising indirect search for the existence of axion dark matter uses radio telescopes to look for narrow spectral lines generated in the magnetospheres of neutron stars. Unfortunately, a large list of theoretical uncertainties has prevented this search strategy from being accepted as robust. In this talk I will present a novel end-to-end pipeline that traces individual photon...
A crucial challenge in perturbative Quantum Field Theory is the description of quantum fluctuations at high-energy scattering processes by the calculation of multi-loop scattering amplitudes. Aiming for improving the efficiency of these computations, we delve into a new technique based on the Loop-Tree Duality (LTD). We analyse the multiloop topologies that appear for the first time at four...
The Muon $g-2$ experiment at Fermilab has recently confirmed Brookhaven's earlier measurement of the muon anomalous magnetic moment $a_\mu$. This new result increases the discrepancy $\Delta a_\mu$ with the Standard Model (SM) prediction and strengthens its "new physics" interpretation as well as the quest for its underlying origin. Following the presentations of the new experimental result...
The progress in the construction and operation of the Baikal Gigaton Volume Detector in Lake Baikal is reported. The detector is designed for search for high energy neutrinos whose sources are not yet reliably identified. It currently includes over 2300 optical modules arranged on 64 strings, providing an effective volume of 0.4 km3 for cascades with energy above 100 TeV. We review the...
The Iron Calorimeter (ICAL) detector at the proposed India-based Neutrino Observatory (INO) aims to detect atmospheric neutrinos and antineutrinos separately in the multi-GeV range of energies and over a wide range of baselines. By utilizing its charge identification capability, ICAL can efficiently distinguish $\mu^-$ and $\mu^+$ events. Atmospheric neutrinos passing long distances through...
A direct measurement of the Higgs self coupling is very crucial to understand the nature of electroweak symmetry breaking. This requires an observation of production of Higgs boson pair, which suffers from very low event rate even at the current LHC run. In our work, we study the prospects of observing the non-resonant Higgs pair production at the high luminosity run of the 14 TeV LHC...
Many mesons with additional valence constituents with respect to the conventional quark-antiquark pair have been discovered in the last decades, leading to a renaissance of hadron spectroscopy. Interpretations of such states span from compact objects to hadronic molecules and searches for new exotic meson candidates provide important insights on the quarks binding mechanisms inside hadrons. In...
The unprecedented collision energy of the LHC has opened up a new discovery frontier. Unfortunately, signs of new physics have yet to be seen. The LHC's first dedicated search experiment, MoEDAL, started data taking for LHC's Run-2. MoEDAL is designed to search highly ionising particle avatars of new physics using p-p and heavy-ion collisions at the LHC. The planned upgrade for MoEDAL at...
The FASER experiment is a new small and inexpensive experiment that is being placed 480 meters downstream of the ATLAS experiment at the CERN LHC. The experiment will shed light on currently unexplored phenomena, having the potential to make a revolutionary discovery. FASER is designed to capture decays of exotic particles, produced in the very forward region, out of the ATLAS detector...
The observations of anomalies in exclusive decays of beauty mesons, with
hints toward possible violation of lepton flavour universality, require new analyses of related processes involving other heavy hadrons, to enlarge the set of observables suitable to test the Standard Model (SM) predictions.
I will present results obtained in the study of decay modes of several hadrons containing a heavy quark.
We explore whether the axion which solves the strong CP problem can naturally be much lighter than the canonical QCD axion. The Z_N symmetry proposed by Hook, with N mirror and degenerate worlds coexisting in Nature and linked by the axion field, is considered and the associated phenomenology is studied in detail.
On a second step, we show that dark matter can be accounted for by this...
KM3NeT is the Mediterranean distributed deep-sea research infrastructure, hosting the next-generation Cherenkov detectors for the observation and study of neutrinos in the energy range from few GeV up to few PeV. KM3NeT/ORCA (Oscillations Research with Cosmics in the Abyss), the detector aimed at the study of low energy neutrinos (> 1 GeV), is currently under construction off the coast of...
Since the rise of the AdS/CFT duality, integrability has proven to be an important tool to advance our understanding of massless QFT. In this talk we demonstrate that integrability is also present in massive QFT in D>2 spacetime dimensions. We show that large classes of massive Feynman integrals are highly constrained by an infinite dimensional Yangian symmetry. When translated to momentum...
High-energy astrophysical neutrinos, discovered by IceCube, are now regularly observed.
Due to their low flux the observation rate remains small, such that open questions about high-energy neutrino astrophysics and particle physics remain limited by statistics at best, or unanswered at worst. Fortunately, this situation will improve in the next years: new neutrino telescopes will come online,...
The NA62 experiment at CERN reports new results from studies of radiative kaon decays 𝐾+→𝑒+𝜈𝛾 (𝐾𝑒2𝛾) and 𝐾+→𝜋0𝑒+𝜈𝛾 (𝐾𝑒3𝛾), using a data sample recorded in 2017--2018. The sample comprises O(10k) 𝐾𝑒2𝛾 candidates and O(100k) 𝐾𝑒3𝛾 candidates with sub-percent background contaminations. Preliminary results with the most precise measurement of the 𝐾𝑒2𝛾 and 𝐾𝑒3𝛾 branching ratios, determination of...
We discuss the production mechanism of a new state, a fully charm tetraquark, discovered recently by the LHCb at M = 6.9 GeV in the $J/\psi J/\psi$ channel. Both single parton scattering (SPS) and double parton scattering (DPS) mechanisms are considered. We calculate the distribution in the invariant mass of the four-quark system $M_{4c}$ for SPS and DPS production of $c c \bar c \bar c$ in...
The operation of an e+e- collider at a CM energy of 250 GeV will yield a large sample of Higgs bosons that are tagged by recoil against an observed Z boson at a fixed laboratory energy. By selecting these Z bosons and looking on the other side of the event, e+e- colliders will be sensitive to essentially all possible rare and exotic Higgs boson decay channels, in most cases down to branching...
The remarkably large integrated luminosity collected by the ATLAS and CMS detectors at the highest proton-proton collision energy provided by LHC allows to use the large sample of top quark events to explore properties of the top quark production and decay and to probe the presence on new physics that might break well established symmetries. The angular properties are explored by illustrating...
We define a generalized entanglement measure in the context of AdS$_3$/CFT$_2$. Compared to the ordinary entanglement entropy between spatial degrees of freedom dual to the area of the Ryu-Takayanagi surface, we take into account both entanglement between spatial degrees of freedom as well as between different fields of the boundary CFT. We then calculate this generalized entanglement measure...
Since the discovery of high-energy neutrinos by the IceCube South Pole Neutrino Detector in 2013, the origin of their cosmic flux is still under debate. Every piece of the puzzle that helps to understand their acceleration sites is of great interest, because cosmic neutrinos are key messengers to explore the non-thermal universe where it is opaque to the cosmic rays and photons. IceCube...
The high-energy cosmic neutrinos seen by IceCube allow us to perform new, powerful tests of high-energy particle physics and astrophysics. In particular, there is vast potential to perform these tests using the high-energy flavor composition, i.e., the proportion of electron, muon, and tau neutrinos in the high-energy neutrino flux. However, presently, these tests are limited by...
The LHCb experiment reported the first observation of pentaquark candidates in 2015, opening a new era in hadron spectroscopy. Since then, other pentaquark candidates, either with hidden-charm or charm-strange quarks content, have been reported by the LHCb collaboration. This talk presents the recent results on pentaquark spectroscopy at LHCb.
In the recent years, several measurements of $B$-decays with flavor changing neutral currents (FCNC), i.e. $b\to s \ell \ell$ transitions, hint at deviations from the Standard Model (SM) predictions.
A search for the flavor-changing neutral current decay $B^{+}→K^{+}\nu\bar{\nu}$ is performed with data sample corresponding to $63~fb^{−1}$ collected at the Υ(4S) resonance by the Belle II...
The Large Hadron Collider (LHC) will be upgraded in several phases to significantly expand its physics program. After the current long shutdown from 2018-2021 (LS2) the accelerator luminosity will be increased to 2 − 3 * 10^34cm−2s−1 exceeding the design value of 1 * 10^34cm−2s−1 allowing the CMS experiment to collect approximately 100 fb−1/year. A subsequent upgrade in 2022-23 will increase...
We introduce here a new method to measure the Higgs decay branching ratios at future $e^+e^-$ Higgs factories, by directly exploiting class numeration. Given the clean environment at a lepton collider, we build an event sample highly enriched in Higgs bosons and essentially unbiased for any decay mode. The sample can be partitioned into categories using event properties linked to the expected...
Evidence for electron-muon universality violation that has been revealed in $b\to s \ell\ell$ transitions in the observables $R_{K,K^*}$ by the LHCb Collaboration can be explained with spin-1 leptoquarks in $SU(2)_L$ singlet $V_1$ or triplet $V_3$ representations in the ${\cal{O}}(1-10)$ TeV range. We explore the sensitivity of the high luminosity LHC (HL-LHC) and future proton-proton...
Non-Hermitian quantum theories have been applied in many other areas of physics. In this talk, I will review recent developments in the formulation of non-Hermitian quantum field theories, highlighting features that are unique compared to Hermitian theories. I will describe their crucial discrete symmetries and how continuous symmetry properties are borne out, including Noether's theorem...
We introduce the property of Planck safety as paradigm for model building. Extensions of the SM are constructed featuring vector-like fermions and a flavor matrix scalars. Yukawa interactions interlocking the SM and BSM sector act as flavor portals that allow to address experimental anomalies, while taming Landau poles and stabilizing the Higgs potential up to the Planck scale.
Next generation of neutrino telescopes currently under construction are drastically improving their ability to constrain the annihilation cross-section of dark matter. In this talk after introducing an angular power spectrum analysis method for future sensitivity of a KM3NeT-like neutrino telescope, we will discuss the implications of results on the various particle dark matter models....
In e+e- collisions between 2 and 3 GeV, excited states of rho, omega and phi can be produced directly. Especially the resonances around 2GeV like rho(2000), rho(2150) and \phi(2170) are not fully understood yet. Theorists describe the phi(2170) as a traditional s s-bar state, an s s-bar g hybrid, a tetraquark state, a Lambda Lambda-bar bound state, or a phi KK resonance. The predicted decay...
The High-Luminosity phase of LHC, delivering five times the LHC nominal instantaneous luminosity, is scheduled to begin in late 2027. The ATLAS Tile Hadronic Calorimeter (TileCal) will need new electronics to meet the requirements of a 1 MHz trigger, higher radiation dose, and to ensure sound performance under high pile-up conditions. Both the on- and off-detector TileCal electronics will be...
The Compact Linear Collider (CLIC) is a mature option for a future electron-positron collider operating at centre-of-mass energies of up to 3 TeV. CLIC would be built and operated in a staged approach with three centre-of-mass energy stages currently assumed to be 380 GeV, 1.5 TeV, and 3 TeV. This presentation provides a full overview of the CLIC Higgs physics potential in both the...
The Thin Gap Chambers (TGCs) of the LHC-ATLAS are responsible for triggering muons in the endcap region at the hardware trigger stage. The frontend system of TGC will be upgraded for HL-LHC to send binary hit-map at every bunch crossing (BC) to the backend system. Such an operation requires lots of unique challenges: high-performance hit BC Identification, fine-tuned clock distribution, and...
We will present our recent calculation of matching NLO QCD corrections
to the production of a top-quark pair in association with a W boson
using the POWHEG-BOX framework. We compare our results with other
Monte Carlo generators for the two same-sign lepton signature
commonly used by the experiments. Special focus will be put on the
assessment of the importance of subleading electroweak...
The LHCf experiment, at the Large Hadron Collider (LHC), consists of two small independent calorimeters placed 140 metres away, on opposite sides of the ATLAS interaction point (IP1). LHCf has the capability to measure zero-degree neutral particles, covering the pseudorapidity region above 8.4. By measuring the very-forward particle production rates at the highest energy possible at an...
The Belle II experiment has accumulated data corresponding to 89.99 fb-1 integrated luminosity in the past 2 years, and is performing very good. Waiting that the full planned data set will be recorded (50 ab-1), which will allow search for rare processes and will have a tremendous impact in the spectroscopy field, the Phase 3 data set allows to already perform analysis with high precision. We...
Triggering long-lived particles (LLPs) at the first stage of the trigger system is very crucial in LLP searches to ensure that we do not miss them at the very beginning. The future High Luminosity runs of the Large Hadron Collider will have an increased number of pile-up events per bunch crossing. There will be major upgrades in hardware, firmware and software sides, like tracking at level-1...
The search for renormalization group invariant relations among parameters to all orders in perturbation theory constitutes the basis of the reduction of couplings concept. Reduction of couplings can be achieved in certain N=1 supersymmetric grand unified theories and few of them can even become finite at all loops. The resulting theories in which successful reduction of couplings has been...
A new method is presented to extract the bottom quark mass from collider data on Higgs production and decay rates. We find a value for the bottom quark MSbar mass at the scale of the Higgs boson mass of mb(mh) = 2.6 +/- 0.3 GeV from recent measurements of Higgs coulings by the ATLAS and CMS experiments at the CERN LHC. This result is compatible with the prediction of mb(mh) from the evolution...
A comprehensive set of inclusive and differential measurements of top quark pair production in association with light, c- and b-jets is presented and results are compared to theory predictions. The status of the search for four top quark production, to which the LHC experiments are starting to be sensitive, and that has important BSM re-interpretations, is also reported.
In the near future all the space agencies are working to restart the human exploration of the space outside the Low Earth Orbit (LEO). Manned space missions in this and the next decade will see the presence of humans on the Moon and Mars surface. One of the main showstopper to be investigated for a safe exploration and colonization is the ionizing radiation biological effects that can...
The Mu2e experiment at Fermilab aims to measure the charged-lepton flavour violating (CLFV) neutrino-less conversion of a negative muon into an electron in the field of a nucleus. The conversion process results in a monochromatic electron with an energy slightly below the muon rest mass (104.97 MeV). The Goal of the experiment is to improve by four orders of magnitude the previous measurement...
Recent result on $e^+e^−$ annihilation to hadrons below 2 GeV obtained at the SND experiment at the VEPP-2000 collider are presented. In particular, we discuss measurements of the $e^+e^-\to\pi^+\pi^-$ and $e^+e^-\to n\bar{n}$ cross sections, and study of the radiative processes $e^+e^-\to \eta\gamma$, $e^+e^-\to \eta\pi^0\gamma$, and $e^+e^-\to \eta\eta\gamma$.
After 9 years of successful operation in proton-proton collisions reaching up to $\sqrt{s}$=13 TeV, the ATLAS detector started in 2018 the preparations for an ambitious physics program, aiming the exploration of very rare processes and extreme phase spaces, an endeavor that will require a substantial increase in the integrated luminosity. To accomplish this purpose, a comprehensive upgrade of...
While CP violation has never been observed in the strong interactions, the QCD Lagrangian admits a CP-odd topological interaction proportional to the so called theta angle, which weighs the contributions to the partition function from different topological sectors. The observational bounds are usually interpreted as demanding a severe tuning of theta against the phases of the quark masses,...
The version II of the Any Light Particle Search (ALPS) experiment is projected to be one of the most sensitive experiments for axion-like particles. Such particles are a solution to the strong CP problem in quantum chromodynamics (QCD) as well as potential dark matter candidates. Based on theory, the axion-like particles are weakly interacting with matter, making them invisible to regular...
Neutrino decay modifies neutrino propagation in a unique way; not only is there flavor changing as there is in neutrino oscillations, there is also energy transport from initial to final neutrinos. The most sensitive direct probe of neutrino decay is currently IceCube which can measure the energy and flavor of neutrinos traveling over extragalactic distances. For the first time, we calculate...
Precision measurements and searches for new phenomena in the Higgs sector are among the most important goals in particle physics. Experiments at the Future Circular Colliders (FCC) are ideal to study these questions. Electron-positron collisions (FCC-ee) up to an energy of 365 GeV provide the ultimate precision with studies of Higgs boson couplings, mass, total width, and CP parameters, as...
DArk Matter Particle Explorer (DAMPE) satellite mission is successfully operating and delivering data for more than 5 years since its launch in December 2015. The instrument is a thick calorimeter type detector, targeted at measuring gamma rays and cosmic-ray electrons up to about 10 TeV with excellent energy resolution and cosmic ray ions up to 100 TeV. Precise measurements of electron,...
Radiative b-hadron decays are sensitive probes of New Physics through the study of branching fractions, CP asymmetries and measurements of the polarisation of the photon emitted in the decay. In particular, these measurements help constraining the size of right-handed currents in extensions of the Standard Model. Large samples of radiative b-decays have been collected by the LHCb experiment...
The European Spallation Source ESS, presently under construction, in Lund, Sweden, is a multi-disciplinary international laboratory. It will operate the world's most powerful pulsed neutron source. Taking advantage of the unique potential of the ESS, the NNBAR collaboration proposed a two-stage program of experiments to perform high precision searches for neutron conversion in a range of...
Machine learning enjoys widespread success in High Energy Physics (HEP) analysis at LHC. However the ambitious HL-LHC program will require much more computing resources in the next two decades. Quantum computing may offer speed-up for HEP physics analysis at HL-LHC, and can be a new computational paradigm for big data analysis in High Energy Physics.
We have successfully employed...
In first-order cosmological phase transitions, the asymptotic velocity of expanding bubbles is of crucial relevance for predicting observables like the spectrum of stochastic gravitational waves, or for establishing the viability of mechanisms explaining fundamental properties of the universe such as the observed baryon asymmetry. In these dynamic phase transitions, it is generally accepted...
Measuring the electron Yukawa is impossible in Higgs boson decays, H -> e+e- , given the smallness of the electron mass that leads to a vanishingly small decay branching fraction. The only direct method to extract the Higgs-electron coupling is through resonant s-channel production in e+e- collisions running at the Higgs pole mass. Such a measurement is possible at the FCC-ee provided one can...
Future high-energy $e^{+}e^{-}$ colliders will provide some of the most precise tests of the Standard Model. Statistical uncertainties on electroweak precision observables and triple gauge couplings are expected to improve by orders of magnitude over current measurements.
This provides a new challenge in accurately assessing and minimising the impact of systematic uncertainties. Beam...
The communities of astrophysics, astronomers and high energy physicists have been pioneers in establishing Virtual Research and Learning Networks (VRLCs)[1] generating international productive consortiums in virtual research environments and forming the new generation of scientists. In this talk we will discuss one in particular: LA-CoNGA Physics (Latin American alliance for Capacity buildiNG...
In ultra-relativistic heavy-ion collisions, one expects copious rates of $\gamma+\gamma$ processes through the interaction of the large electromagnetic fields of the nuclei which can lead to light-by-light scattering via loop diagrams. This process was directly observed for the first time in UPCs at the LHC by ATLAS. Final measurements of light-by-light scattering with full run 2 dataset with...
Nucleons are one of the most fundamental building blocks of ordinary matter, yet their internal structure and dynamics are still not fully understood. Electromagnetic form factors allow to investigate fundamental properties of the nucleon. The BESIII collaboration has studied the time-like form factors of the proton using the energy scan and the ISR technique. The |GE/GM| ratio is obtained...
RES-NOVA is a new proposed experiment for the hunt of neutrinos from core-collapse supernovae (SN) via coherent elastic neutrino-nucleus scattering (CE$\nu$NS) using an array of archaeological lead (Pb) based cryogenic detectors. The high CE$\nu$NS cross-section on Pb and the ultra-high radiopurity of archaeological Pb enable the operation of a high statistics experiment equally sensitive to...
The SHERPA (“Slow High-efficiency Extraction from Ring Positron Accelerator”) project aim is to develop an efficient technique to extract a positron beam from one of the accelerator rings composing the DAΦNE accelerator complex at the Frascati National Laboratory of INFN, setting up a new beam line able to deliver positron spills of O(ms) length, excellent beam energy spread and emittance....
Ultrarelativistic Heavy Ions of large charge Z are accompanied by a large flux of Weizsacker–Williams photons. This opens up the opportunity to study a variety of single photon induced nuclear processes, as well as photon-photon processes.
We would like to present a formalism which allows to calculate differential distributions of dileptons produced via photon-photon fusion in semi-central...
The measurements of inclusive deep-inelastic electron-proton scattering (DIS) cross sections at high center-or-mass energies offer a unique opportunity for precision tests of electroweak interactions. In this talk we revisit electroweak effects in DIS and discuss the combined determination of parameters of electroweak theory together with parton distribution functions of the proton [1,2]....
ROOT is renovating itself at a fast pace in order to allow physicists to address the unprecedented scale of LHC Run 3 datasets and beyond. Thanks to these recent developments, many HEP analyses could be made 5 to 20 times faster, providing turnaround times in the order of minutes rather than hours.
ROOT's RDataFrame, a high-level interface for data analysis and processing in C++ and Python,...
Higgs production cross sections at LHeC (FCC-he) energies are as large (larger than) those at future Z-H $e^+e^-$ colliders. This provides alternative and complementary ways to obtain very precise measurements of the Higgs couplings, primarily from luminous, charged current DIS. Recent results for LHeC and FCC-he [1] are shown and their combination is presented with pp (HL-LHC) cross sections...
The African Institute for Mathematical Sciences is a network of excellence centres
for innovative post-graduate training in mathematical sciences in Africa.
Established in 2003, today AIMS counts 6 institutes in 5 African countries
(Cameroon, Ghana, Rwanda, Senegal, South Africa) and focuses on academics,
research, and industry initiative. The students at AIMS follow different...
The current experimentally measured parameters of the Standard Model (SM) suggest that our Universe lies in a metastable electroweak vacuum, where the Higgs field is prone to vacuum decay to a lower state with catastrophic consequences. Our measurements dictate that such an event has not taken place yet, despite the many different mechanisms that could have triggered it in our past light-cone....
Cosmology is well suited to study the effects of long range interactions due to the large densities in the early Universe. In this talk, I will explore how the energy density and equation of state of a fermion system diverge from the commonly assumed ideal gas form under the presence of scalar long range interactions with a range much smaller than cosmological scales. In this scenario,...
The FNAL Muon g-2 collaboration has performed a measurement of the muon magnetic anomaly to 0.46 ppm, based on the ratio between the observed spin precession frequencies of orbiting positive muons to protons at rest in the same magnetic field. We describe how the muon precession frequency has been measured by fitting the modulation of the rate of high energy positrons detected by the...
Relativistic heavy ion beams are accompanied by a large flux of equivalent photons, giving rise to a set of photon-induced processes. These can lead to photon-photon interactions in both ultraperipheral collisions, where the nuclei do not overlap, as well as in hadronic processes accompanied by the production of hot, dense matter. The latter provides a potentially sensitive electromagnetic...
The Large Hadron-Electron Collider (LHeC) will operate at √s = 1.2 TeV and accumulate about 1/ab of integrated electron-proton luminosity [1]. We report here results of a novel study of high energy photon-photon interactions at the LHeC, at the 𝛾𝛾 center-of-mass energy of up to 1 TeV, opening new frontiers in the electroweak physics. Despite very high ep luminosity, the experimental...
Detector optimisation and physics performance studies are an integral part for the development of future collider experiments.
The Key4hep project aims at providing a common stack of easy to use software tools for future, or even present, High Energy Physics projects. Key4hep is to a large extent based on software tools that are already very actively used in the community like ROOT, Geant4...
Muon collisions at multi-TeV center of mass energies are ideal for studying Higgs boson properties. At these energies the production rates will allow precise measurements of its couplings to fermions and bosons. In addition the double Higgs boson production rate could be sufficiently high to directly measure the parameters of trilinear self-couplings, giving access to the determination of the...
The International Particle Physics Outreach Group (IPPOG) has been making concerted and systematic efforts to present and popularize particle physics across all audiences and age groups since almost 25 years. Today the scientific community has in IPPOG a strategic pillar in fostering long-term, sustainable support for fundamental research around the world. One of the main tools IPPOG has been...
Plasma accelerators can drastically shrink large-scale future accelerator facilities such as a linear collider. Maintaining high beam quality and accelerating with high energy efficiency is key to delivering high luminosity per wall-plug power. However, this is particularly challenging in a plasma accelerator due to their microscopic size—extreme precision and stability is required. We present...
A new class of inflationary attractors characterized by a strongly non-geodesic motion has been discovered in the past few years. I will describe how they naturally arise in negatively curved field space, allowing to inflate on potentials that are steep in Planck units. In these scenarios, primordial fluctuations often experience a transient tachyonic instability, akin to the one occurring in...
Prototypes of electromagnetic and hadronic imaging calorimeters developed and operated by the CALICE collaboration provide an unprecedented wealth of highly granular data of hadronic showers for a variety of active sensor elements and different absorber materials. In this presentation, we discuss detailed measurements of the spatial and the time structure of hadronic showers to characterise...
The KLOE-2 experiment, at the $e^+e^-$ DA$\Phi$NE collider in Frascati, acquired an integrated luminosity of about 5 fb$^{-1}$ with an upgraded KLOE apparatus. The whole KLOE/KLOE-2 data sample corresponds to 2.4 $\times 10^{10} \,\phi$ and $3.1 \times 10^8 \,\eta$ meson events allowing to develop a wide hadron physics program from rare meson decays to $\gamma\gamma$ fusion and dark...
Photon-photon fusion is a rare process at hadron and ion colliders. It is particularly interesting as a remarkably clean interaction with little (if any) remnant activity from the interacting particles. In this talk we present the status of photon-photon fusion measurements at the ATLAS detector. We present differential measurements of the light-by-light scattering process, γγ → γγ, in...
With the aim to highlight the impact of fundamental research on the broader society, the new Particle Therapy MasterClass (PTMC) package was developed and recently integrated into the International MasterClass 2021 (IMC) online programme, attracting some 37 institutes from 20 countries and more than 1500 students. The PTMC is focusing on the topic of cancer treatment, a particular sensitive...
The Extreme Energy Events Project (EEE) is an experiment devoted to the study of Extensive Atmospheric Showers (EAS) through an array of muon telescopes. It was directly born with the intent to involve high school students and teachers in its advanced physics research. Each EEE telescope was built by students and teachers at CERN and most of the telescopes are located inside Italian school...
In the light of the recent result of the Muon g-2 experiment and the update on the test of lepton flavour universality R_K published by the LHCb collaboration, we systematically build and discuss a set of models with minimal field content that can simultaneously give: (i) a thermal Dark Matter candidate; (ii) large loop contributions to b→sℓℓ processes able to address R_K and the other B...
Detections of black hole mergers from the LIGO-Virgo interferometers provide an unprecedented opportunity to glance into unexplored regimes of gravity, where spacetime curvature is several orders of magnitudes larger than the one probed by other experiments. First, the state of the art of black holes ringdown spectral observations will be reviewed. Next, we will show how requiring stringent,...
I would like to review recently introduced factorization called Improved Transverse Momentum Dependent factorization which applies in the regime of QCD when the saturation effects become relevant and when one has hard final state. Furthermore I would like to present an application of this formalism to phenomenological predictions of jet production in pA and eA.
The coupling of the electroweak gauge bosons of the Standard Model (SM) to leptons is independent of the lepton flavour. Extensions of the SM do not necessarily respect this lepton flavour universality. Semileptonic rare decays of heavy flavour, to which new particles can give sizeable contributions, allow for sensitive tests of lepton flavour universality, and constitute powerful indirect...
A comprehensive set of inclusive and differential measurements of top quark pair production in association with EWK bosons (W, Z or ɣ) , including searches for rare single top production processes (tZq) is presented.
The Belle II experiment at the asymmetric $e^+e^-$ collider, SuperKEKB, is a substantial upgrade of the Belle/KEKB experiment. Belle II aims to record 50 ab$^{-1}$ of data over the course of the project. During the first physics runs in 2018-2020, around 100 fb$^{-1}$ were collected. Large improvements in the instantaneous luminosity are expected in the coming years. The Belle II detector...
A summary will be given of the current status and the prospects for energy recovery linac (ERL) technology and its possible application for future ep and e+e- colliders, as well as for low energy particle and nuclear physics. The talk will give an overview of ERL development facilities, current and future, describe key technology challenges and also cover the aspect of sustainability of ERLs....
Theia is a proposed large-scale novel neutrino detector, designed with the ability to discriminate between Cherenkov and scintillation signals. The design consists of a cylindrical tank viewed by inward-looking PMTs and filled with a novel target, such as water based liquid scintillator (WbLS) or other scintillator, which would allow simultaneous reconstruction of particle direction from the...
Significant deviations from SM predictions have been observed in $ b \to s \mu^+ \mu^-$ decays and in the muon (g-2). Scalar leptoquark extensions of the SM are known to be able to address these anomalies, but generically give rise to lepton flavor violation (LFV) or even proton decay. We propose new muon flavored gauge symmetries as a guiding principle for leptoquark models that preserve the...
Although the LHC experiments have searched for and excluded many proposed new particles up to masses close to 1 TeV, there are many scenarios that are difficult to address at a hadron collider. This talk will review a number of these scenarios and present the expectations for searches at an electron-positron collider such as the International Linear Collider. The cases discussed include the...
The renormalization constant $Z_J$ of the flavor-singlet axial-vector current with a non-anticommuting $\gamma_5$ in dimensional regularization is determined to order $\alpha_s^3$ in QCD with massless quarks. The result is obtained by computing the matrix elements of the operators appearing in the axial-anomaly equation between the vacuum and a state of two (off-shell) gluons to 4-loop order....
The REINFORCE EU project ([link][1]) engages and supports citizens to cooperate with researchers and actively contribute to the development of new knowledge for the needs of science and society. After a brief description of the four demonstrators comprising REINFORCE, we will present in detail the demonstrator titled “Search for new particles at the LHC”, which will engage citizen-scientists...
The Belle II experiment at the asymmetric $e^+e^-$ collider, SuperKEKB, is a substantial upgrade of the Belle/KEKB experiment. Belle II aims to record 50 ab$^{-1}$ of data over the course of the project. During the first physics runs in 2018-2020, around 100 fb$^{-1}$ of data were collected. These early data include specifically-designed low-multiplicity triggers which allow a variety of...
Results are presented of searches in ATLAS for four-top-quark production. This rare process, with a predicted cross section of 12 fb in the Standard Model, has not been observed yet by experiment. The analysis is based on data from proton--proton collisions at a centre-of-mass energy of 13 TeV collected with the ATLAS detector during run 2 of the CERN Large Hadron Collider, and corresponding...
We show that the relaxion coupled to a dark photon can generate a stochastic gravitational wave background in the early Universe. When the electroweak symmetry is restored after reheating, the relaxion starts rolling again until the back-reaction potential wiggles reappear. Depending on the time of barrier-reappearance, Hubble friction alone is insufficient to trap the relaxion in a large...
ProtoDUNE-SP and ProtoDUNE-DP are large-scale single-phase and dual-phase prototypes of DUNEs far detector modules, operated at the CERN Neutrino Platform. ProtoDUNE-SP has finished its Phase-1 running in 2020 and has successfully collected test beam and cosmic ray data. In this talk, we will discuss the first results of ProtoDUNE-SP Phase-1's physics performance, ProtoDUNE-DPs design and...
We show how the polarized amplitudes of $b \bar{b} \rightarrow Z h$ associated with a non-vanishing $b$-quark Yukawa coupling and a scalar or pseudoscalar Higgs boson $h$ can be built up solely from vector form factors (FF) of properly grouped classes of diagrams, bypassing completely the need of explicitly manipulating $\gamma_5$ in dimensional regularization.
In addition, the FFs of a...
Rare b->sll decays are flavour-changing neutral-current processes that are forbidden at the lowest perturbative order in the Standard Model (SM). As a consequence, new particles in SM extensions can significantly affect the branching fractions of these decays and their angular distributions. The LHCb experiment is ideally suited for the analysis of these decays due to its high trigger...
The next generation of collider detectors will make full use of Particle Flow algorithms, requiring high precision tracking and full imaging calorimeters. The latter, thanks to granularity improvements by 2 to 3 orders of magnitude compared to existing devices, have been developed during the past 15 years by the CALICE collaboration and are now reaching maturity. The state-of-the-art status...
The Compact Linear Collider (CLIC) is a mature option for a future
electron-positron collider operating at centre-of-mass energies of up
to 3 TeV. CLIC would be built and operated in a staged approach with
three centre-of-mass energy stages currently assumed to be 380 GeV,
1.5 TeV, and 3 TeV. A selection of results from recent studies will be
presented showing that CLIC has excellent...
The current Gravitational Wave (GW) surveys of Binary Black Hole (BBH) mergers provide unprecedented probes of the dynamics in extreme gravitational fields and relativistic velocities. It has been proposed that these Compact Objects may have exotic characteristics making them be different from simpler Black Holes (BHs): they would produce repeated GW pulses of widely uncertain morphology...
Experiments demonstrated that plasma-based accelerators can produce high energy electrons (e.g., 8 and 42GeV) in short distances (20 and 85cm, respectively). They are very high gradient accelerators (i.e., 50GeV/m) and therefore hold the promise to be more compact and affordable than RF-based linear accelerators. An alternative path investigates the use of dielectric accelerators with high...
A new class of dark matter models introduces a dark sector with new Dirac fermions charged under an additional U(1) gauge group. The corresponding gauge boson, the dark photon $A'$, has a MeV-GeV mass and couples to the Standard Model photon (and Z) via kinetic mixing. Fermionic bound states ("darkonium" $\Upsilon_D$) could form if the dark sector coupling constant is strong enough. We present...
A new opportunity for a possible flagship experiment in Europe opens by exploiting a unique opportunity that has long been hidden in the Chooz site — Europe’s most famous site for reactor neutrino science. The “SuperChooz” project benefits by existence of 2 caverns, formerly hosting the Chooz-A nuclear reactor, built in the 60’s, that are becoming vacant upon its dismantling completion. They...
The FCAL Collaboration is presently designing and testing electromagnetic sampling calorimeters foreseen for the forward region of future detectors at electron-positron colliders. Two calorimeters, LumiCal and BeamCal, are foreseen for a precise and instant measurement of the luminosity, respectively. For the integrated luminosity, obtained from the rate of low angle Bhabha scattering events,...
Recent measurements of lepton-universality ratios and $B_s\to\mu^+ \mu^-$ decay point to possible new physics contribution to $b\to s \mu^+ \mu^-$ transitions. If new physics really is present, then it is possible that it could lie at a scale beyond the kinematical reach of the LHC or even that of a future, more energetic, proton-proton collider. In this instance, the relevant new physics is...
Over the last decade, the gradient flow formalism became an important tool for lattice simulations of Quantum Chromodynamics. Most prominently, scale setting strategies based on the gradient flow superseded previous strategies. Moreover, the gradient flow offers remarkable renormalization properties which pave the way for cross-fertilization between perturbative and lattice calculations.
In...
The THDMa is a new physics model that extends the scalar sector of the Standard Model by an additional doublet as well as a pseudoscalar singlet and allows for mixing between all possible scalar states. In the gauge eigenbasis, the additional pseudoscalar serves as a portal to the dark sector, with a priori any dark matter spin states. The Inert Doublet model is another intriguing new physics...
The Urknall Unterwegs module, a component of the outreach arm of the German science communication project KONTAKT, is a planned traveling indoor-outdoor exhibition on particle physics. Except it's intended for people who might not much care about physics. These are the people who skip the science centres, the open days at the local lab or institute, or who don't check into science...
Crystal calorimetry has a long history of pushing the frontier of high energy resolution measurements for EM particles. Recent technological developments in the fields of crystal manufacturing and photodetector developments (SiPMs) have opened new perspectives on how a segmented crystal calorimeter with dual-readout capabilities could be exploited for particle detectors at future collider...
$SU(2)_L$-invariance links charged dilepton $\bar{q}\,q^\prime\,\bar{\ell}\,\ell$ and dineutrino $\bar{q}\,q^\prime\,\bar{\nu}\,\nu$ couplings. This connection can be established using SMEFT and holds if only SM-like left-handed light neutrinos are present. It allows to perform complementary experimental tests of lepton universality and charged lepton flavor conservation with flavor-summed...
Multi-messenger astronomy is a vast and expanding field as electromagnetic (EM) observations are no longer the only way of exploring the Universe. This field had its dawn when new astronomical messengers of non-electromagnetic origin were observed: solar flare, neutrinos, and most recently the detection of gravitational waves (GWs) in 2015. Due to these new messengers, astrophysical triggers...
In the context of the PanScales parton shower project I will describe two advances in the development of final-state parton showers with controlled logarithmic accuracy. The first (arXiv:2011.10054) involves simple new algorithms to resolve the long-standing issue of incorrect subleading-colour contributions at leading logarithmic (LL) accuracy in dipole- and antenna-type showers, and also...
The LHeC and the FCC-he offer unique prospects for the measurement of top properties in energy frontier, luminous $ep$ scattering. An update of the 2012 Conceptual Design Report was produced last year [1]. In this talk we will revisit the determination of the top mass through inclusive measurements. In addition, we will address the possibilities for precise measurements of $Wtq$ and $\gamma...
We report on an ongoing project aimed to teach particle physics in primary schools, based on an original format developed by C.Lazzeroni and M.Pavlidou at the University of Birmingham (UK). The workshop allows young children (ages 8-11) to learn the world of particles, use creative design to make particle models and engage in creative writing to describe how particles interact with each...
We present a detailed comparison of predictions computed by four publicly available computer codes for Drell-Yan processes at the LHC and Tevatron colliders. We point out that while there is agreement among the predictions at the next-to-leading order accuracy, the predictions at the next-to-next-to-leading order (NNLO) differ, whose extent depends on the observable. The sizes of the...
Recently, LHCb has confirmed the evidence for lepton flavour universality violation in the $R_K$ ratio with 3.1$\sigma$ significance. We present new physics implications within a model-independent approach and make projections for future measurements that indicate that LHCb will be in the position to discover lepton non-universality with the Run 3 data in a single observable. We also present...
To address the challenges of providing high performance EM calorimetry in future experiments under high luminosity and difficult radiation and pileup conditions, R&D is being conducted on promising optical-based technologies that can inform the design of future detectors, with emphasis on ultra-compactness, excellent energy resolution and spatial resolution, and especially fast timing...
The Hyper-Kamiokande (HK) experiment will detect neutrinos produced at an upgraded 1.3 MW J-PARC 30 GeV accelerator with a new water Cherenkov detector that is 8 times larger than Super-Kamiokande. This will allow HK to accumulate neutrino events 20 times faster than the currently operating T2K experiment. To take advantage of the high statistics HK will collect, systematic uncertainties on...
In spite of the variety of attempts to create dark matter at accelerators, up-to-now, none of the conducted experiments has produced any evidence.
This elusiveness of dark-matter has then triggered innovative and open-minded approaches spanning a wide range of energies with high-sensitivity detectors [1].
In this scenario is inserted the Positron Annihilation into Dark Matter Experiment...
The Advanced LIGO and Advanced Virgo detectors are now observing large numbers of gravitational-wave signals from compact binary coalescences, with 50 entries in the latest transient catalogue GWTC-2. With this rapidly growing event rate, our chances become better to detect rare astrophysical effects on these novel cosmic messengers. One such rare effect with a long and productive history in...
As the heaviest particle of the model, with a mass close to the electroweak scale, the top quark is an interesting candidate to look for hints of new physics. The electroweak couplings of the top quarks are specially relevant in many extensions of the Standard Model. Indeed, as the top quark was not produced in the previous generation of electron-positron colliders most of its electro-weak...
Homogeneous electromagnetic calorimeters made of crystalline scintillation elements played a crucial role in the discoveries in high-energy physics experiments at colliders during the last three decades [1]. Nevertheless, their future application at high luminosity collider facilities (High Luminosity LHC, FCC in hh mode) might become limited by radiation damage effects under the charged and...
Experimental anomalies like the muon g-2 and the decay of the B meson $B\to K\mu\mu$ suggest the existence of interactions that predominantly talk to the muon. The muon philic nature of these hypothetical interactions is necessary to avoid experimental constraints on lepton flavor violating processes. Models that explain g-2 feature either light weakly coupled states or heavy strongly coupled...
Rare decays provide a sensitive laboratory to search for New Physics. Recent CMS results concerning rare decays are presented.
We place constraints on the normalised energy density in gravitational waves from first-order strong phase transitions and then from the formation of primordial black holes using data from Advanced LIGO and Virgo's first, second and third observing runs. First, adopting a broken power law model, we place 95 % confidence level upper limits simultaneously on the gravitational-wave energy density...
As neutrino physics marches towards its goal of percent-level determinations of oscillation parameters, the corresponding theory of neutrinos scattering off nuclei (detector material) must be improved and developed to a sub-percent level of precision. Large logarithms, e.g. $\log(E_\nu/m_e)$, and coherent enhancements, i.e. $Z\alpha/v$, can enhance QED corrections significantly. In this talk...
Communicating the science and achievements of the ATLAS Experiment is a core objective of the ATLAS Collaboration. This talk will explore the range of communication strategies adopted in ATLAS communications, with particular focus on how these have been impacted by the COVID-19 pandemic. In particular, an overview of ATLAS’ digital communication platforms will be given –with focus on social...
The loop-tree duality (LTD) has become a novelty
alternative to bootstrap the numerical evaluation of
multi-loop scattering amplitudes.
It has indeed been found that Feynman integrands,
after the application of LTD, displays a representation
containing only physical information, the so-called
causal representation.
In this talk, I discuss the all causal representation
of...
Nowadays, it is well known that the electromagnetic interaction between high-energy particles and matter experiences substantial modifications when the latter consists of a crystalline medium and its lattice axes are almost parallel to the input beam direction. In particular, strong boosts to both the Bremsstrahlung (by electrons and positrons) and the pair production (by photons) cross...
The proposed LUXE experiment at the DESY aims to probe QED at the nonperturbative regime in collisions between high-intensity laser pulses and high-energy electron or photon beams. This setup also provides a unique opportunity to search for physics beyond the standard model. In this talk we show that by leveraging the large photon flux generated at LUXE, one can probe axion-like-particles...
Decays of b-hadrons that are very suppressed in the Standard Model, such as fully leptonic flavour-changing neutral-current transitions or lepton flavour violating decays, are particularly clean probes for New Physics. The LHCb experiment is designed for the study of b-hadron decays and ideally suited for the analysis of very rare decays due to its high trigger efficiency, as well as excellent...
In this poster we present the results of a lattice QCD comput-ation at $N_f = 2$ for the processes $B_{s} \rightarrow D_{s}^{(\star)}$, and their form factors parametrization in the heavy quark limit $\mathcal{G}$, $h_{A_{1}}$, $h_{A_{2}}$ and $h_{A_{3}}$. This study is in line with the research of new physics in the B sector, which is motivated by recent tensions reported in lepton flavor ...
The AdS/CFT correspondence allows to describe strongly-coupled quantum field theories in terms of weakly-coupled gravitational systems, offering an opportunity to investigate quantum systems at strong coupling far from thermal equilibrium. A simple non-equilibrium process is the quench, representing a system thermalization after the sudden injection of energy. In the case of localized...
The IDEA detector concept for a future e+e- collider adopts an ultra-low mass Drift Chamber as the central tracking system. It is a He based, 4 m long and 4 m diameter, fully stereo drift chamber with a total material budget of ~ 0.016 X0 in the barrel part and ~ 0.05 X0 in the end-caps. It will be instrumented with readout electronics implementing the Cluster Counting/Timing techniques,...
We show that one of the simplest extensions of the Standard Model, the addition of a second Higgs doublet, when combined with a dark sector singlet scalar, allows us to: i) explain the long-standing anomalies in the Liquid Scintillator Neutrino Detector (LSND) and MiniBooNE (MB) while maintaining compatibility with the null result from KARMEN, ii) obtain, in the process, a portal to the dark...
We propose a new experiment to search for axions in the $30\,\mu eV$ regime using superconductive cavities in a strong magnetic field. Axions are hypothetical particles that could solve the well known strong CP problem in the standard model of particle physics. Furthermore axions could explain the dark matter content of the universe. Axions are expected to convert to photons in the presence of...
Flavor violation in the top sector allows an extra few GeV contribution to the Higgs mass and thereby could reduce the SUSY breaking scale to remain within a few TeV. In this talk we discuss our findings of a detailed investigation on the CMSSM parameter scan particularly in the context of the LHC Higgs observation using the information-theoretic approach and will demonstrate its impact on...
It is anticipated that high brightness muon beams will be needed primarily in two types of accelerators, a muon collider and a neutrino factory. The primary challenge posed by using muons for the working particle of an accelerator complex, and the reason they have not been used extensively, is the muon's short life-time (2.2μs at rest) and the relatively long cooling periods required by...
The nanohertz gravitational wave background (GWB) is believed to be dominated by emission from supermassive black hole binaries (SMBHBs). This population's properties have commonly been investigated using major galaxy mergers as a proxy for SMBHB formation. However, the observation of several dual active galactic nuclei (AGN) strongly suggests a link between AGN and SMBHBs, given that these...
It was recently pointed out that very energetic subclasses of supernovae (SNe), like hypernovae and superluminous SNe, might host ultra-strong magnetic fields in their core. Such fields may catalyze the production of feebly interacting particles, changing the predicted emission rates. Here we consider the case of axion-like particles (ALPs) and show that the predicted large scale magnetic...
Differential cross section measurements are an important part of the efforts to precisely measure the Higgs boson properties, providing model-independent measurements of kinematic and event observables. This poster presents the H to yy differential cross section analysis using the full Run-2 data set taken between 2015 and 2018 at the ATLAS experiment. The analysis uses analytical functions to...
KAHVE Laboratory, a particle detector, accelerator, and instrumentation research laboratory located at Boğaziçi University Kandilli Campus area at Istanbul, is currently working on the design of a RFQ operating at 800 MHz that will accelerate proton beam up to 2 MeV. As a first part of this linear accelerator, a Microwave Discharge Ion Source operating at 2.45 GHz frequency including 20 keV...
The Muon g-2 experiment at Fermilab aims to measure the muon anomalous magnetic moment
($a_{\mu}$) with a final accuracy of 140 part per billions (ppb). The first result on Run-1 dataset
were unveiled on April 7, 2021, showing a very good agreement with the previous experimental
result at Brookhaven National Laboratory (BNL), improving the uncertainty by achieving a precision
of 460 ppb...
The electric (EDM) and magnetic (MDM) dipole moments of particles are powerful tools to explore fundamental laws of physics. EDM,strongly suppressed in the standard model, offers a perfect “smoking gun”sign of new physics. Baryons’ MDM provides insight of QCD models and might probe quark substructure. Study of EDM and MDM is usually carried out analyzing spin precession in a magnetic dipole,...
Ground-based gamma-ray telescopes are built to detect Cerenkov radiation generated by the interaction of the earth's atmosphere and gamma rays coming from different astronomical sources. Major Atmospheric Cerenkov Experiment (MACE) is a 21m diameter ground-based high energy gamma-ray telescope set up by BARC at Hanle (32.7◦ N, 78.9◦ E, 4270 m asl) in the Ladakh region of North India. The...
The kinematics of WIMP dark matter-nuclear scattering is drastically altered if the interaction is inelastic, i.e. dark matter is up-scattered to a heavier state with certain mass splitting. With $\mathcal{O}$(100) keV mass splitting inelastic dark matter will evade the search in most direct detection experiments, where the momentum transfer is limited either by the mass of target nuclei, or...
Neutrino scattering on liquid and solid targets at low energy transfer can serve both as a tool for searching the BSM physics, for example, such as neutrino electromagnetic interactions [1], and as a test of the Standard Model at low-energy scale [2]. At the same time, the theoretical apparatus for low-energy elastic neutrino scattering on electrons and nuclei bound in liquids and solids must...
Current limits for the tau-neutrino transition magnetic moment to a sterile
neutrino are far weaker than its electron and muon counterparts. This talk addresses
possible constraints on the transition magnetic moment between the tau neutrino and
an (\mathcal O(\si{MeV})) sterile neutrino at the far-detector of DUNE: the proposed
neutrino-beam experiment at FermiLab. We compare this with...
The local nonequilibrium neutrino distribution function in a core-collapse
supernova is considered and two variants of its analytical approximation are
suggested. The proposed analytical approximations are verified using the results
of a one-dimensional simulation of neutrino propagation, performed self-
consistently with hydrodynamics in Prometheus-Vertex code. It was shown that
the...
We have analyzed new contributions to the muon anomalous magnetic moment in a class of models that generates a naturally large transition magnetic moment for the neutrino (needed to explain the XENON1T electron recoil excess). These models are based on an approximate $SU(2)_H$ symmetry that suppresses the neutrino mass while allowing for a large neutrino transition magnetic moment. We have...
Baryogenesis in the early universe requires a new source of CP violation beyond that in the CKM model. Perhaps the most promising place to look is in the Higgs sector. Though the Standard Model predicts that the couplings of the Higgs boson are exactly CP-conserving, more general models of the Higgs sector give many opportunities for CP violation. This talk will discuss the expectations for...
We consider the top-pair production through pp annihilation, followed by the semileptonic decay of the top-quark. We study the new physics contributions to the Wtb vertex at the Large Hadron Collider. In particular, we estimate the limits on anomalous couplings for the pre-existing data of 13 TeV LHC energy with integrated luminosities of 36.1 fb^{-1} and 140 fb^{-1}. Prediction of limits on...
We present the results of a first cycle of the unique Cultural Collisions programme run entirely online over one school year 2020/2021 in the South East Europe region. Cultural Collisions is a novel cross-disciplinary science engagement, networking and education programme designed to stimulate the interest of high school students in science by introducing the methods and concepts of art and...
Fragmentation of the axion field may produce the observed DM abundance, which makes it possible for ALP DM to appear with lower values of the axion decay constant than those allowed by the conventional misalignment mechanism. Previously, kinetic misalignment has been proposed to open up this parameter space. We find that for a large range of parameters the field becomes fragmented before...
We fit galactic rotation curves obtained by SPARC from dark matter haloes that are not spherically symmetric, but allowed to become prolate or oblate with a higher-multipole density distribution. This is motivated by observing that the flattening of v(r)=constant is the natural Kepler law due to a filamentary rather than a spherical source, so that elongating the distribution could bring about...
In the context of simulation and reconstruction for the Muon Collider, muon reconstruction efficiency has been evaluated to explore the potential for the study of dark-SUSY channels. In dark-SUSY models, supersymmetric particles act as a portal between Standard Model particles and the dark sector. In this analysis, the lightest Minimal Supersymmetric Standard Model neutralino decays, on one...
This poster will present the measurement on antineutrino flux and the extracted 235U and 239Pu spectra at Daya Bay Reactor Neutrino Experiment. The eight identical detectors, allocated underground in two near sites and one far sites, has operated 1958 days to measure the most precise prompt energy spectrum from six commercial nuclear reactors, each with a thermal power of 2.9GW. The...
LaBr3:Ce crystals are used for radiation imaging in medical physics, with PMT or SIPM readout. An R&D was pursued with 1/2 and 1" crystals to realize compact large area detectors (up some cm$^2$ area) with SIPM array readout, aiming at high light yields, good energy resolution/linearity and fast time response for low-energy X-raysdetection. This study was triggered by the FAMU experiment at...
Recent results of the study of double parton scattering with the CMS experiment using states of a Z boson and jets, and of four jets will be presented.
The medium modification in energies of kaon and antikaon at zero momentum in strongly magnetized asymmetric nuclear matter are explored using a chiral $\text{SU(3)}$ model. The parameters used in this calculation are fitted to nuclear matter saturation properties and with vacuum masses of baryon. We have investigated the possibility of antikaon condensation in neutron star with charge...
The experimental study of the Higgs boson at the Large Hadron Collider is rapidly progressing over the past decade. The hunt for the elusive boson is now evolving to measure kinematics properties of the Higgs boson interacting with other particles. These detailed measurements provides an opportunity to study novel physical phenomena which occur at energies which are much large than those...
To enhance the Level-1 muon trigger selectivity and maintain good muon tracking capability under future HL-LHC runs with an instantaneous luminosity of 5-7ⅹ10$^{34}$cm$^{-2}s^{-1}$, the ATLAS experiment plans to replace the present innermost station of Muon Spectrometer in the forward region, Small Wheels, with the New Small Wheel (NSW) detector system during its Phase-Ⅰ upgrade. The NSW...
The accurate description of the internal structure of hadrons is a very challenging task. In order to compare the predictions with the highly-accurate experimental data, it is necessary to control any possible source of theoretical uncertainties. Thus, we can use the information extracted from final state measurement to constraint our knowledge about the internal structure of hadrons. In this...
This talk presents a model of the electron-like excess observed by the MiniBooNE experiment comprising of oscillations involving two new mass states: $\nu_4$, at $\mathcal{O}(1)$ eV, that participates in oscillations, and $\mathcal{N}$, at $\mathcal{O}(100)$ MeV, that decays to $\nu+\gamma$ via a dipole interaction.
Short-baseline oscillation data sets, omitting MiniBooNE appearance data, are...
The experimental measurements on flavour physics, in tension with Standard Model predictions, exhibit large sources of Lepton Flavour Universality violation. We perform an analysis of the effects of the global fits to the Wilson coefficients assuming a model independent effective Hamiltonian approach, by including a proposal of different scenarios to include the New Physics contributions. A...
A detailed understanding of Earth's Matter effect is inevitable to correctly analyze the data from the upcoming high-precision long-baseline experiments to resolve the remaining fundamental unknowns such as neutrino mass ordering, leptonic CP violation and precision measurements of the oscillation parameters. In this paper, for the first time, we explore in detail the capability of Deep...
We investigated the appearance of straight infinite Wilson lines lying on the self-dual plane in the context of the Self Dual sector of the Yang Mills theory and in connection to the Lagrangian implementing the MHV vertices (MHV Lagrangian) according to the Cachazo-SvrcekWitten (CSW) method. The plus helicity field in the MHV Lagrangian was already known to be a straight infinite Wilson line...
Heavy-quark symmetry (HQS), despite being approximate, allows to relate dynamically many hadron systems.In the HQS-limit doubly-heavy baryons, whose dynamics is determined by a light quark moving in a color field of a static pair of heavy quarks, are similar to heavy mesons with a heavy antiquark being a color source. Non-local interpolation currents are introduced and corresponding matrix...
Color Glass Condensate is a powerful theoretical tool that is able to describe the dynamical properties of partons in the QCD non-perturbative regime, characterized by strong color fields and high parton density.
A previous study, performed for a wide range of energies measured at the Relativistic Heavy Ion Collider (RHIC) and at the Large Hadron Collider (LHC), has shown that observables...
The reconstruction and calibration of hadronic final states is an extremely challenging experimental aspect of measurements and searches at the LHC. This talk summarizes the latest results from ATLAS for jet and missing energy reconstruction and calibration. New approaches to jet inputs better utilize relationships between calorimeter and tracking information to significantly improve the...
We predict that triangle singularities of hadron spectroscopy can be strongly affected in heavy ion collisions. To do it we examine various effects on the singularity-inducing triangle loop of finite temperature in the terminal hadron phase.
It appears that peaks seen in central heavy ion collisions are more likely to be hadrons than rescattering effects under two conditions. First, the...
The China’s Space Station, currently under construction, will host the next-generation detector for direct measurements of cosmic rays: HERD. The core of HERD is a thick (3 nuclear interaction lengths and 55 radiation lengths) 3D calorimeter made of about 7500 LYSO cubes. On the top and the four sensitive sides, from outside to the calorimeter, there are a silicon charge detector, a plastic...
We explore the implications of g-2 new result to five models based on the SU(3)C×SU(3)L×U(1)N gauge symmetry and put our conclusions into perspective with LHC bounds. We show that previous conclusions found in the context of such models change if there are more than one heavy particle running in the loop. Moreover, having in mind the projected precision aimed by the g-2 experiment at FERMILAB,...
An inclusive and normalised differential cross sections measurements are presented for the production of single top quarks in association with a W boson, in proton-proton collisions at a centre-of-mass energy of 13 TeV. Events containing one muon and one electron in the final state are analysed. For the inclusive measurement, a multivariate discriminant, exploiting the kinematic properties of...
We develop the approach to the problem of neutrino oscillations in a magnetic field introduced in [1] and extend it to the case of three neutrino generations. The theoretical framework suitable for computation of the Dirac neutrino spin, flavour and spin-flavour oscillations probabilities in a magnetic field is given. The closed analytic expressions for the probabilities of oscillations are...
The femtoscopic studies performed by the ALICE Collaboration in pp and p–Pb collisions provide results with unprecedented precision for the short-range strong interactions between several hadron pairs containing nucleons, kaons or hyperons. Three-particle femtoscopy goes one step further and aims to provide the first direct measurement of genuine three-body forces at short distances. The cases...
The poster presents a joint determination of the reactor antineutrino spectra resulting from the fission of $^{235}$U and $^{239}$Pu by combining the Daya Bay and PROSPECT experiments. In the Daya Bay experiment, the antineutrinos were generated by six low enriched uranium (LEU) nuclear commercial reactors with 2.9 GW thermal power each and detected by eight antineutrino detectors deployed in...
Many physics analyses in Higgs, top and electroweak physics improve the kinematic reconstruction of the final state by constrained fits. This is a particularly powerful tool at $e^+e^-$ colliders, where the initial state four-momentum is known and can be employed to constrain the final state. A crucial ingredient to kinematic fitting is an accurate estimate of the measurement uncertainties,...
Physics of ultraperipheral ultrarelativistic heavy-ion collisions gives an excellent opportunity to study photon-photon interaction. Vast moving charged particles are surrounded by an electromagnetic field that can be considered as a source of (almost real) photons. The photon flux scales as the square of the nuclear charge, so $^{208}$Pb has a considerable advantage over protons as far as the...
The next generation helioscopes babyIAXO and IAXO will search for evidence of axion and axion-like particles (ALPs) produced in the interior of the Sun. A very promising candidate for the focal plane detectors are low temperature metallic magnetic calorimeters (MMCs). Combining good energy resolution and high quantum efficiency, MMC-based detectors would allow to investigate the solar axion...
Within the Phase-II upgrade of the LHC, the readout electronics of the ATLAS LAr Calorimeters is prepared for high luminosity operation expecting a pile-up of up to 200 simultaneous pp interactions. Moreover, the calorimeter signals of up to 25 subsequent collisions are overlapping, which increases the difficulty of energy reconstruction. Real-time processing of digitized pulses sampled at 40...
Neutrinos play a significant and sometimes even dominant role in all phases of the supernova explosion. The dominant neutrino processes in a core-collapse supernova are beta-processes, which are responsible for the energy exchange between neutrinos and the matter and change a chemical composition of a matter. We investigate an influence of a magnetic field on beta-processes under conditions of...
Particle physics seems to be abstract and far away from high-school students’ daily life. However, research in particle physics is not only relevant for scientists. Technologies developed at CERN have numerous applications, e.g., contributions to cancer therapy in medicine, contributions to art authentication and restoring in cultural heritage, and many others. In short, the fundamental...
New results are presented corresponding to the measurement of several properties of WZ production in the CMS experiment. The measurements profit from the high purity of the three lepton final state and the whole luminosity of the Run II of the LHC to provide precisions never reached before on this diboson process.
Inclusive and differential cross section measurements are complemented with...
The CALorimetric Electron Telescope (CALET) is a space experiment installed aboard the International Space Station (ISS). The instrument has been accumulating data since October 2015, searching for nearby cosmic-ray sources and dark matter signatures with accurate measurements of the cosmic electron+positron spectrum up to the TeV region. The CALET main detector consists of a charge detector,...
A measurement of the Higgs boson production cross section in association with a top-quark pair (ttH) and the subsequent Higgs boson decay into a b-quark pair is presented. The events used for this analysis are characterised by one or two electrons or muons. Also in the single-lepton channel, the "boosted topology" was studied, targeting events with a Higgs boson and possibly a hadronically...
Measurements of cross sections for the production of pairs of oppositely charged -bosons (WW) provide an important test of the Standard Model (SM), in particular electroweak theory and perturbative quantum chromodynamics. WW production can additionally be a dominant background for measurements of Higgs boson production, and in searches for physics beyond the SM. In contrast to most previous...
The production of a top-quark-antiquark pair in association with a Z boson (ttZ) is a rare process that directly probes the neutral coupling of the top quark to the electroweak gauge bosons. A better understanding of this process also benefits precision measurements of other Standard Model processes and beyond the Standard Model searches where ttZ is an important background. The ttZ process...
Universal Extra Dimension (UED) is a well-motivated and well-studied scenario. One of the main motivations is the presence of a dark matter (DM) candidate namely, the lightest level-1 Kaluza-Klein (KK) particle (LKP), in the particle spectrum of UED. The minimal version of UED (mUED) scenario is highly predictive with only two parameters namely, the radius of compactification and cut-off...
A high-energy muon collider could be the most powerful and cost-effective collider approach in the multi-TeV regime, and a neutrino source based on decay of an intense muon beam would be ideal for measurement of neutrino oscillation parameters. Muon beams may be created through the decay of pions produced in the interaction of a proton beam with a target. The muons are subsequently accelerated...
The phenomenon of neutrino oscillations emerges due to coherent superposition of neutrino mass states. An external environment can modify a neutrino evolution in a way that the coherence will be violated. Such violation is called quantum decoherence of neutrino mass states and leads to the suppression of flavor oscillations. In our previous paper [1], we presented a new theoretical framework,...
The recent tension between local and early measurements of the Hubble constant can be explained in a particle physics context. A mechanism is presented where this tension is alleviated due to the presence of a Majoron, arising from the spontaneous breaking of Lepton Number. The lightness of the active neutrinos is consistently explained. Moreover, this mechanism is shown to be embeddable in...
The effect of neutrino quantum decoherence has attracted a growing interest during the last 15 years. The most of already performed studies deal with searches of neutrino quantum decoherence in the terrestrial reactor and solar neutrino experiments. The forthcoming large volume neutrino detectors (e.g., JUNO, Hyper-Kamiokande and DUNE) will provide a new frontier in high-statistics...
We present a detailed analysis of the neutrino spin oscillations in magnetized moving and polarized matter. New phenomena of the resonant amplification of neutrino spin oscillations induced by the transverse component of the matter polarization are considered. In this contribution, a generalization is made in respect to our previous studies [1,2] and the effects of the transversal magnetic...
We present new advances in the minimal SO(10) Higgs model where the $45\oplus126$ scalars determine spontaneous symmetry breaking down to the Standard model. The comprehensive analysis of all theoretical aspects was performed extending previous results. Computational tools, including full one-loop mass corrections and one-loop scalar beta functions, were developed and allowed us to construct...
The Precision Proton Spectrometer (PPS) is a new subdetector of CMS introduced for the LHC Run 2, which provides a powerful tool for advancement of BSM searches.The talk will present the new results on exclusive diphoton, Z+X, and diboson production explored with with PPS, illustrating the unique sensitivity which can be achieved using proton tagging. The upcoming Run 3 will bring new...
We study the perturbative structure of threshold enhanced logarithms in the coefficient functions of deep inelastic scattering (DIS) and semi-inclusive $e^+ e^−$ annihilation (SIA) processes and setup a framework to sum them up to all orders in perturbation theory. Threshold logarithms show up as the distributions $((1−z)^{−1} log^i(1−z))_{+}$ from the soft plus virtual (SV) and as logarithms...
The non-diagonal correlators of tensor fermionic current with scalar, pseudoscalar, vector and axial-vector ones are considered as examples of the two-point one-loop amplitudes modified by a constant homogeneous magnetic field. The crossed-field limit of this correlators are found. The tensor current is a fermionic part of the Pauli Lagrangian relevant for the electromagnetic interaction of...
A ten years extension of the data taking of BESIII experiment, recently approved, motivated an upgrade program both for the leptonic collider BEPCII and for some of the sub-detectors of the spectrometer.
In particular, the current inner drift chamber is suffering from aging and the proposal is to replace it with a detector based on cylindrical GEM technology.
The CGEM detector is made of...
The Jiangmen Underground Neutrino Observatory (JUNO) currently under construction in China, will be the first multi-kton liquid scintillator detector and has a vast potential for new insights into several fields of neutrino and astroparticle physics. To reach its design sensitivity for detecting reactor and solar neutrinos, a radiopure liquid scintillator is required. For IBD measurements, a...
The Resistive Plate Chambers (RPC) system will be upgraded to sustain the harsher HL-LHC conditions and to help maintain good trigger efficiency and performance of the CMS experiment. The present RPC chambers would continue to operate and a new link system will be installed improving the timing resolutions of the RPC system up to 1.5 ns to cope with the expected higher background. The...
Decoding the exact Lorentz structure of possible new physics in various $B$ decays involving $b\to\, c\, l\,\nu$ charged current and $b\, \to\, s\, l\,l$ neutral current is very crucial. There still exists a long standing discrepancy in the combined measurements of the ratio of branching ratio $R_{D^{(*)}}$ in $B \,\to\, D^{(*)}\, l\,\nu$ decays which stands $3\sigma$ away from the standard...
During Run 2 (covering 2015–2018) the LHC achieved instantaneous luminosities as high as 2x10^34cm^2s^1 while delivering proton-proton collisions at \sqrt{s}=13 TeV. The challenge for the trigger system of the CMS experiment is to reduce the registered event rate from about 40 MHz to about 1 kHz. In this poster, muon reconstruction and identification algorithms used during Run 2 and their...
The final stage of a relativistic heavy-ion collision is a hadron gas. Final-state interactions therein distort the p_t spectrum of particles coming from the phase transition upon cooling the quark-gluon plasma.
Using recent state of the art parametrizations of pion interactions by Ruiz de Elvira and Peláez we provide theoretical computations of the pionic depth of the gas: how likely is it...
The positron source of the International Linear Collider (ILC) is based on a superconducting helical undulator passed by the high-energy electron beam to generate photons which hit a conversion target. Since the photons are circularly polarised the resulting positron beam is longitudinally polarised. The power deposition in the undulator walls should be below the acceptable limit of 1 W/m...
A fast-spinning axion can dominate the Universe at early times and generates the so-called kination era. The presence of kination imprints a smoking-gun spectral enhancement in the primordial gravitational-wave (GW) background. Current and future-planned GW observatories could constrain particle theories that generate the kination phase. Surprisingly, the viable parameter space allows for a...
Strong bounds from direct detection experiment put stringent limit on the dark matter mass which forces us to go beyond WIMP model of dark matter. In recent years the light mass dark matter particles gain lots of attention among the particle physicists. In this talk I will discuss about light gauge bosons motivated from U(1) extension of standard model and axions which can be a possible dark...
The production of the $f_{0}(980)$ meson at high energies is not well understood. We investigate two different potential mechanisms for inclusive scalar meson production in the $k_t$-factorization approach: color-singlet gluon-gluon fusion and color evaporation model. The $\gamma^* \gamma^* \to f_0(980)$ form factor(s) can be constraint from the $f_0(980)$ radiative decay width. The $g^ g^...
We consider the Higgs Triplet Model HTM not restricted by the custodial symmetry and the Minimal Left-Right Symmetric Model MLRSM. The models include scalar triplets with different complexity of scalar potentials and, due to experimental restrictions, completely different scales of non-standard triplet vacuum expectation values. In both models, a doubly charged Higgs boson $H^{\pm\pm}$ can...
Among the projects currently under study for the next generation of particle accelerators, the muon collider represents a unique machine, which has the capability to provide leptonic collisions at energies of several TeV. The multi-TeV energy regime is as yet unexplored and holds a huge physical potential that will enable a novel research programme ranging from high precision measurements of...
Photon fusion is a rare and interesting process at proton colliders, with a remarkably clean signature that has little (if any) remnant activity from the interacting particles. A particularly interesting photon-induced process, the production of W-boson pairs (yy->WW), was recently observed using the 139/fb of proton-proton collision data collected by ATLAS at √s=13TeV during LHC Run-2. In...
This poster presents a novel correlated background present in the antineutrino detection using the inverse beta decay reaction. Spontaneous fissions and (α, n) reactions in peripheral materials of the antineutrino detector, such as borosilicate glass of photomultipliers and electronics boards, produce fast neutrons and prompt gamma rays. If the shielding from the material to the detector...
New CMS results on B hadron decays involving a charmonium resonance are presented
We present recent results on the cross section measurement of the Higgs boson production using WW decays and the corresponding constraints on the Higgs boson couplings, as well as constraints on new physics models derived from high mass searches. The poster is focused on the recent measurements exploiting the full Run 2 proton-proton collision data collected by the CMS detector.
The full Run II CMS dataset (137.1 fb$^{-1}$) of proton-proton collisions at a center-of-mass energy of 13 TeV is analyzed, to search for the electroweak VBS production of an opposite sing pair of W bosons plus two jets in the fully leptonic channel. Events are selected requiring two leptons (electrons or muons) and two jets with large pseudorapidity separation and high invariant mass; they...
For its ability to systematically capture beyond the Standard Model (SM) effects, effective field theory (EFT) has received much attention in phenomenological analyses of e.g. LHC data. In EFT studies, it is essential to identify an operator basis and calculate the anomalous dimensions of the couplings, which encode their scale dependence. In this work, we renormalize the scalar EFT at high...
I will present precision predictions for scalar leptoquark pair production at hadron colliders. Apart from QCD contributions, included are the lepton t-channel exchange diagrams relevant in the light of the recent B-flavor anomalies. All contributions are evaluated at next-to-leading order in QCD and improved by resummation corrections, in the threshold regime, from soft-gluon radiation at...
The inclusive jet production cross sections and triple-differential cross sections of top quark-antiquark pair production at the LHC at a center of mass energy of 13 TeV are used together with data of inclusive deep inelastic scattering to extract the parton distributions of the proton and the strong coupling constant. In an additional analysis of the same data, the standard model cross...
Dark matter is one of the remaining puzzles of the Standard Model. This poster presents preliminary results of a search for dark matter candidates in invisible Higgs boson decays with the ATLAS experiment using 139 fb-1 of proton-proton collision data. The search targets vector boson fusion Higgs boson production, which is expected to be the most sensitive channel. This presentation highlights...
Abstract: Since the Higgs boson discovery in 2012, measuring its properties and couplings with high precision is a priority for ATLAS and CMS. The Higgs coupling to itself is providing a direct probe on the EWSB and is a precision test of the electroweak theory but has not been observed yet. Measuring the total and differential (mHH) cross-sections of two Higgs boson production is the current...
A direct search for the Standard Model Higgs boson decays to a pair of charm quarks is presented, probing the Higgs boson Yukawa couplings to the second generation of fermions. This analysis makes use of the full LHC Run 2 dataset collected with the ATLAS detector, corresponding to an integrated luminosity of 139 fb-1 of proton collisions at a centre-of-mass energy of 13 TeV. Higgs boson...
A search for the electroweak VBS production of a VW pair plus two jets, in the semi-leptonic channel, at a centre-of-mass energy of 13 TeV is reported. The data sample corresponds to the full Run-II CMS dataset of proton-proton collisions at 13 TeV including an integrated luminosity of 137.1 fb−1. Events are analyzed in two energy regimes: either the hadronically decaying W/Z boson is...
In 2034, within the rapidly changing landscape of gravitational-wave astronomy, the Laser interferometer Space Antenna will be the first space-based detector that will observe the gravitational spectra in the millihertz frequency band. It has recently been proposed that numerous LIGO/VIRGO sources will also be detectable by LISA. LISA will be able to detect binary black holes from our Milky...
Two highly segmented NOvA scintillation detectors, separated by 810 km and located in the path of the NuMI neutrino beam produced at Fermilab, are optimized to study the neutrino oscillation phenomenon. At the same time, the larger Far detector (FD) with its 4,000 m2 surface area is capable to search for the exotic low-mass magnetic monopoles, and to monitor flux of the specific...
The India-based Neutrino Observatory (INO) collaboration, a multi-institutional effort to build a
50 kton magnetised Iron Calorimeter (ICAL) for studying neutrino oscillations. The magnetic
field in the ICAL, induced by copper coils, will be a crucial input for the track fitting algorithms that reconstruct the four-momenta of atmospheric neutrinos. So far, the magnetic field map is obtained...
HYDJET++ is a Monte Carlo event generator merging parametrized soft part inspired by hydrodynamics with hard part containing jets. It has been successful to describe particle production in Pb+Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV energies. In this poster we present for the first time the particle spectra and collective flow for top LHC energy $\sqrt{s_{NN}}=5.02$ TeV Pb+Pb collisions....
High-energy physics on collider exploits large-scale instruments and infrastructures which are inaccessible for educational purpose. Possibly individual detection elements can be used to discover a given technology, but such simple setups do not illustrate properly the concept of combining various measurements to characterize particles. This is especially true for tracking devices, which...
We explore the parameter space of a U(1) extension of the standard model $-$ also called the super-weak model [1] $-$ from the point of view of explaining the observed dark matter energy density in the Universe. The new particle spectrum contains a complex scalar singlet and three right-handed neutrinos, among which the lightest one is the dark matter candidate. We explore both freeze-in and...
Along with other experiments, the Daya Bay Reactor Neutrino Experiment has searched for light sterile neutrino mixing, using electron antineutrino disappearance. Through comparing a 1230-day sample to prediction, assuming a 3+1 neutrino model, Daya Bay set the most stringent limits to date on the mixing of sterile neutrinos for $2\times 10^{-4}\, < \Delta m^2_{41} < 0.3$ eV$^2$. A joint...
One of the main goals of the relativistic nuclear collisions studies is to investigate the behavior of nuclear matter under extreme conditions of temperature and energy density. Strange and multi-strange hadrons can provide valuable information related to the properties of the created system and the onset of deconfinement. The energy and centrality dependence of the effective temperatures...
We discuss the expected luminosity performance of the Compact Linear Collider (CLIC), which is a future e+e- collider proposed for the CERN site. We will discuss parameter choices and their impact on the luminosity of this collider. Start-to-end tracking simulations of the CLIC beam will be presented. These simulations include a comprehensive set of imperfections, both static and dynamic. From...
The electroweak penguin $B$ decays mediated by $b \to s \ell^{+} \ell^{-}$ transitions are flavour-changing neutral current processes, and are thus sensitive to new physics because of possible contributions of heavy particles in the quantum loop. We report measurements of lepton flavor universality violation observables $R_{K}$ and $R_{K^{*}}$, and other related decays, based on the full data...
Cosmic-ray particles have longly been studied as a potential source of noise for interferometric Gravitational Wave detectors. These particles, mostly muons at sea level, can interact with the detector mirrors releasing charges or inducing thermal effects, which, at the detector output, could be observed as transient excesses of noise, namely glitches. For the Advanced Virgo detector, the rate...
This poster presents the search for CP-violation in the top Yukawa coupling using ttH and tH production modes in the diphoton decay channel (H → γγ). The analysis is based on the 139 fb−1 of proton-proton colli- sion data at center-of-mass energy √s = 13 TeV recorded with the ATLAS detector at the Large Hadron Collider. Two separate sets of selections are introduced to capture the full...
The quark-gluon plasma (QGP), produced in relativistic heavy-ion collisions, freeze-out through multi-partonic interactions to final state hadrons. The transverse momentum ($p_{\rm T}$) spectra study of the produced particles can ighten the thermodynamical properties of the QGP medium. In this work, a detailed study of the $p_{\rm T}$ spectra of the identified charged particles (pions, kaons,...
We report the first measurement of exclusive cross sections for $e^{+}e^{-} \to B\bar{B}$, $e^{+}e^{-} \to B\bar{B}^{*}$, and $e^{+}e^{-} \to B^{*}\bar{B}^{*}$ in the energy range from $10.63$ to $11.02\,{\rm GeV}$. The $B$ mesons are fully reconstructed in a large number of hadronic final states, and the three channels are distinguished using the beam-energy-constrained mass variable. For...
In the framework of PYTHIA8.2 program we considered p-Pb and p-Au heavy ion collisions at the energy of 5.02 TeV and 8 TeV. The advantage of this program is in the combining of several nucleon-nucleon collisions into one heavy ion collision, based on phenomenological treatment of a hadron as a vortex line in a colour superconducting medium, the consistent treatment of the central rapidity...
We investigate the potential of core-collapse supernovae (SNe) to constrain axion-like particles (ALPs) coupled to nucleons and electrons. ALPs coupled to nucleons can be efficiently produced in the SN core via nucleon-nucleon bremsstrahlung and, for a wide range of parameters, leave the SN producing a large ALP flux. For ALP masses exceeding 1 MeV, these ALPs would decay into...
I will present a recent application of the SN 1987A cooling bound to set a constraint on dark flavoured sectors. This is possible thanks to the fact that the protoneutron stars are hot and dense environments where hyperons can be efficiently produced. Therefore a decay of the form $Λ→nX^0$, where $X^0$ is a new bosonic dark particle, will be severely constrained. I will explain the ingredients...
Effective Field Theories such as HEFT, organized as momentum expansions, are a controllable approximation to strong dynamics only near threshold, as they miss exact elastic unitarity, reducing their predictive power at a higher scale if small separations from the Standard Model are found at the LHC orelsewhere. Unitarized chiral perturbation theory extends their reach to saturation of...
The ATLAS collaboration at LHC has chosen the resistive Micromegas technology, along with the small-strip Thin Gap Chambers (sTGC), for the high luminosity upgrade of the first muon station in the high-rapidity region, the New Small Wheel (NSW) project. Micromegas quadruplets have been constructed at the involved construction sites in France, Germany, Italy, Russia and Greece. At CERN, the...
In March 2018 the KLOE-2 experiment finished data taking at the upgraded e+e- DAΦNE collider of the INFN Laboratori Nazionali di Frascati. The combined data sample collected by KLOE and KLOE-2 amounts to almost 8 fb$^{-1}$ integrated luminosity and it is the largest existing data sample in the world collected at an e+e- collider at the ϕ meson peak, corresponding to ~2.4 $\times$ 10$^{10}$ ϕ...
The Time-of-Flight (ToF) detectors of the ATLAS Forward Proton (AFP) system are designed to measure the primary vertex z-position of the pp -> pXp processes by comparing the arrival times measured in the ToF of the two intact protons in the final state.
We present the results obtained from a performance study of the AFP ToF detector operation in 2017. A time resolutions of individual...
The capability to determine the FCC-ee centre-of-mass energies (ECM) at the ppm level using resonant depolarization (RD) of the beams is essential for the Z line shape measurements, the W mass and the possible observation of the Higgs boson s-channel production.
A first analysis (arXiv:1909.12245) demonstrated the feasibility of this programme for the runs at the Z pole and at the W pair...
At the Institute for Nuclear Physics in Mainz the new electron accelerator MESA will go into operation within the next years. In the extracted beam operation (150 MeV, 150 $\mu$A) the P2 experiment will measure the weak mixing angle in electron-proton scattering in 10,000 hours operation time. Therefore, the high-power beam dump of this experiment is ideally suited for a parasitic dark sector...
Innovative 3D metal printing technology has been recently improved and used widely in various fields for both basic science and high technology. The next generation methodology of the novel calorimeter, dual-readout calorimeter, is one of the candidates to achieve very high energy resolutions for both EM and hadronic particles in future e+e- colliders. Traditionally the module of the...
The Electron Capture in $^{163}$Ho experiment, ECHo, is a running experiment for the determination of the neutrino mass scale via the analysis of the end point region of the $^{163}$Ho electron capture spectrum. In the first phase, ECHo-1k, about 60 MMCs pixels enclosing $^{163}$Ho ions for an activity of about 1Bq per pixel have been operated for several months. The goal of this first phase...
The ENUBET experiment, included in the CERN Neutrino Platform effort as NP06/ENUBET, is developing a new neutrino beam based on conventional techniques in which the flux and the flavor composition are known with unprecedented precision ($\mathcal{O}$(1%)). Such a goal is accomplished monitoring the associated charged leptons produced in the decay region of the ENUBET facility. Positrons and...
The realisation of the LHeC and the FCC-he at CERN require the development of the energy recovering technique in multipass mode and for large currents $\cal{O}(10)$ mA in the SRF cavities. For this purpose, a technology development facility, PERLE, is under design to be built at IJCLab Orsay, which has the key LHeC ERL parameters, in terms of configuration, source, current, frequency and...
We present high-precision predictions for $\ell^-\ell^+$ production ($\ell=\mu,\tau$) at $\gamma\gamma$ collisions by considering a complete set of one-loop-level scattering amplitudes, i.e., full electroweak (EW) $\mathcal{O}(\alpha)$ corrections together with soft and hard QED radiation. We perform detailed numerical discussion of the one-loop EW radiative corrections, particularly the pure...
In this talk the current status and plans are presented on the LHeC, towards the new HEP strategy update in about 5 years time, on physics, with emphasis on the eh-hh relation, on the machine, especially the IR, and further detector developments. The talk also covers FCC-he and refers to a separate presentation of the ERL facility PERLE. It is based on the comprehensive CDR update which is...
The performance of ATLAS SemiConductor Tracker (SCT) in Run-2 at Large Hadron Collider (LHC) has been reviewed during the current long shutdown. The LHC successfully completed its Run-2 operation (2015-2018) with a total integrated delivered luminosity of 156 fb$^{−1}$ at the centre-of-mass pp collision energy of 13 TeV. The LHC high performance provide us a good opportunity for physics...
The ATLAS level-1 calorimeter trigger (L1Calo) is a hardware-based system that identifies events containing calorimeter-based physics objects, including electrons, photons, taus, jets, and missing transverse energy. In preparation for Run 3, when the LHC will run at higher energy and instantaneous luminosity, L1Calo is currently implementing a significant programme of planned upgrades. The...
The IDEA detector concept for future e+e- colliders proposes a tracking system composed by a Si based inner system, an ultra-low mass Drift Chamber central system with Particle Identification capabilities and a Si based outer layer surrounding the drift chamber. The designed tracking system allows to fulfill the high momentum and angular resolutions requirements for the whole momentum range,...
In the model of low-energy quantum gravity by the author the
cosmological redshift and additional dimming of remote objects may
be interpreted as results of scattering of photons on gravitons of
the background. A tentative detection of a diffuse cosmic optical
background by the New Horizons mission may be connected with
non-forehead collisions of photons with gravitons, too....
The study of the $Z$-boson decay was crucial for the success of the LEP experiment. In $e^+ e^-$ collisions, with the centre of mass energy matched to its mass, i.e. $\sim$ 91 GeV, a huge number of $Z$-bosons was produced ($\sim10^6$). Significant statistics allowed for precise measurements of its decay products along with the Standard Model (SM) parameters. The precision of LEP was so high...
We compute the top quark contribution to the two-loop amplitude for on-shell W/Z boson pair production in gluon fusion. Exact dependence on the top quark mass is retained. For each phase space point the integral reduction is performed numerically and the master integrals are evaluated using the auxiliary mass flow method, allowing fast computation of the amplitude with very high precision....
Computations of the trace anomaly of chiral fermions have raised a discussion regarding possible unitarity issues at one-loop in four-dimensional theories involving chiral fermions. This was manifested by the claimed existence of an imaginary CP-violating term in the trace of the energy momentum tensor – the Pontryagin density. We revisit this computation using dimensional regularization and...
Among the projects currently under study for the post-LHC generation of particle accelerators the muon collider represents a unique machine, which has the capability to provide very high energy leptonic collisions and to open the path to a vast and mostly unexplored Physics program.
However, on the experimental side, such a great Physics potential is accompanied by unprecedented technological...
The search for experimental signatures of the critical point (CP) of strongly interacting matter is one of the main objectives of the NA61/SHINE experiment at CERN SPS. In the course of the experiment, a beam momentum (13A – 150A GeV/$c$) and system size (p+p, p+Pb, Be+Be, Ar+Sc, Xe+La, Pb+Pb) scan is performed. Local proton density fluctuations in transverse momentum space represent an order...
Charged particle trajectory reconstruction at a Muon Collider detector
is more similar to the hadron collider environment than an electron
collider. The presence of the beam-induced background leaves a large
hit multiplicity in the tracking detector that complicates the pattern
recognition stage of track reconstruction. The BIB hits increase the
possible hit combinations that need to be...
This poster presents an update on the Analytical Method (AM) algorithm for trigger primitive (TP) generation in the CMS Drift Tube (DT) chambers during the High Luminosity LHC operation (HL-LHC or LHC Phase 2). The algorithm has been developed and validated both in software with an emulation approach, and through hardware implementation tests. The algorithm is mainly divided in the following...
In this talk we present the analytic evaluation of the two-loop QED correction
to the mu-e elastic scattering, retaining the full dependence on
the muon mass and considering the electron as a massless particle.
We discuss the generation of integrands from Feynman
diagrams as well as the evaluation of the latter by recalling
the analytic expressions of the two-loop master...
The data collected at the LHC does not indicate significant deviations from the predictions of the Standard Model (SM). Taking into account that precision observables can be predicted already at two and three loops, it is evident the necessity to develop stringent tests of self-consistency of the SM. We compute the two-loop $\beta$-function of pure Yang-Mills and quantum chromodynamics using...
The calculation of the solar axion flux has recently generated much attention due to the upcoming helioscope IAXO, studies of plasmon processes, and in context of the Xenon1T anomaly. It has been realised that axions can be powerful tools for studying solar metal abundances and magnetic fields.
However, the feasibility of such studies depends on our ability to accurately predict the solar...
Correlations between identified particles produced in high-energy nuclear collisions provide a wealth of information about hadronization mechanisms and the evolution of the system. New correlation measurements between long-lived particles (including $\pi$, K, p, $\Lambda$,$\Xi$) are used to investigate the particle production and the species dependence of (mini)jet fragmentation. The...
Time is an enigmatic property of the universe which confounded physicists for ages. This property is increasingly dark and cryptic when we deal with metric spaces of the microscopic scales in the universe. There are remarkable theories, in particular, the loop quantum gravity (LQT) which helps us in understanding the cosmology of these microscopic scales. However, the theory possesses...
Flavour physics represents a unique test bench for the Standard Model. New analyses performed at the LHC experiments are now providing unprecedented insights into CKM metrology and new results for rare decays. The CKM picture can provide very precise Standard Model predictions through global analyses.
The Unitarity Triangle (UT) analysis can also be used to constrain the parameter space in...
PEN is an industrial polyester plastic interesting for the physics community as a new type of wavelength shifting plastic scintillator. Recently, PEN structures with good radio-purity and attenuation length have been successfully produced using the injection compression molding technology. This opens the possibility for usage of PEN as optically active structural components in low-background...
The Large Hadron Collider (LHC) is the current highest energy collider, colliding bunches of protons at center-of-mass energy of 13 TeV. In order to further searches for new physics, even higher energies need to be reached. A $\mu^+ \mu^-$ collider is a viable alternative, allowing physicists to reach a high center-of-mass energy in a smaller ring than hadron colliders, and with smaller...
Dynamical symmetry breaking can happen through a Higgs mechanism but also spontaneously within a strongly-enough coupled theory.
We treat a field-theoretical quark model of QCD based on a linear+Coulomb Cornell potential (to account for the longitudinal interaction), together with a transverse interaction (to account for Coulomb gauge gluons) in BCS approximation.
After extracting the...
The success of any particle detector at a collider experiment depends on its ability to measure both the trajectories and energies of particles exiting the interaction point. Especially important and difficult is measuring the trajectories and energies of particles in the very forward region - particles that exit the detector with very shallow angles compared to the beam line. The difficulty...
Detector characterization and data quality studies (referred collectively as “DetChar” in the following) are key inputs to improve the sensitivity of a ground-based interferometric gravitational-wave (GW) detector like Virgo, to optimize the performance of the instrument during data taking periods and to vet GW candidate signals identified in low-latency or offline. DetChar is involved in the...
