Borexino is a 280-ton liquid scintillator detector that took data from May 2007 to October 2021 at Laboratori Nazionali del Gran Sasso in Italy. Thanks to the unprecedented radio-purity of the detector, the real time spectroscopic measurement of solar neutrinos from both the pp chain and CNO fusion cycle of the Sun has been performed. Borexino also reported the first directional measurement of...
We investigate the discovery potential for long-lived particles produced in association with a top-antitop quark pair at the (High-Luminosity) LHC. Compared to inclusive searches for a displaced vertex, top-associated signals offer new trigger options and an extra handle to suppress background. We propose a search strategy for a displaced di-muon vertex decaying in the tracking chambers,...
Communicating science through mobile smartphone and tablet applications is one of the most efficient ways to reach general public of diverse background and age coverage. The Higgsy project was created to celebrate the 10th anniversary of the discovery of the Higgs boson at CERN in 2022. This project introduces a mobile game to search for the Higgs boson production in a generic particle physics...
The elastic scattering of protons at 13 TeV is measured in the range of the protons??? transverse momenta allowing the access to the Coulomb-Nuclear-Interference region. The data were collected thanks to dedicated special LHC beta* = 2.5km optics. The total cross section as well as rho-parameter, the ratio of the real to imaginary part of the forward elastic scattering amplitude, are measured...
The Mu2e experiment, currently under construction at Fermilab, will search for neutrinoless mu->e conversion in the field of an aluminum atom. A clear signature of this charged lepton flavor violating two-body process is given by the monoenergetic conversion electron of 104.97 MeV produced in the final state.
An 8 GeV/c pulsed proton beam interacting on a tungsten target will produce the...
NUSES is a new space mission project aiming to test innovative observational and technological approaches related to the study of low energy cosmic and gamma rays, high energy astrophysical neutrinos, Sun-Earth environment, Space weather and Magnetosphere-Ionosphere-Lithosphere Coupling (MILC). The satellite will host two experiments, named Terzina and Zirè. While Terzina will focus on space...
The Pierre Auger Observatory was built to study ultra-high-energy cosmic rays. It has a hybrid design that allows one to observe the main features of extensive air showers with unprecedented precision. However, these discoveries have opened new questions about the nature of cosmic rays. One of the most intriguing is the discrepancy between the observed number of muons and the expected value...
Axionlike particles (ALPs) are predicted in many extensions of the Standard Model and are viable dark matter candidates. These particles could mix with photons in the presence of a magnetic field. Searching for the effects of ALP-photon mixing in gamma-ray observations of blazars has provided some of the strongest constraints on ALP parameter space so far. For the first time, we perform a...
The Higgs boson mass, and its decay width, are fundamental properties of this particle. Here, we discuss the latest measurements of these properties, as well as their future prospects, with the CMS experiment.
Novel quantum phenomena have been recently discussed [1] in association to a peculiar time correlation between entangled neutral kaons produced at a φ-factory: the past state of the first decayed kaon, when it was still entangled before its decay, is post-tagged by the result and the time of the future observation on the other kaon decay. This surprising “from future to past” effect is fully...
Some say SUSY is dead, because LHC has not discovered it yet. But is this
really true? It turns out that the story is more subtle. SUSY can be 'just
around the corner', even if no signs of it has been found and a closer
look is needed to quantify the impact of LHC limits and their implications
for future colliders. In this contribution, a study of prospects for SUSY
based on scanning...
Exclusive and diffractive physics measurements are important for better understanding of the non-perturbative regime of QCD. Recent results from the CMS and TOTEM experiments using pp collisions at a center-of-mass energy of 13 TeV are presented in this talk.
The physics of ultraperipheral ultrarelativistic heavy-ion collisions
gives an excellent opportunity to study photon-photon interaction.
Vast moving charged particles (nuclei) 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...
KATRIN is probing the effective electron anti-neutrino mass by a precise measurement of the tritium beta-decay spectrum near its kinematic endpoint. Based on the first two measurement campaigns a world-leading upper limit of 0.8 eV (90% CL) was placed. New operational conditions for an improved signal-to-background ratio, the steady reduction of systematic uncertainties and a substantial...
We present an estimation of the noise induced by scattered light inside the main arms of the Einstein Telescope (ET) gravitational wave detector. Both ET configurations for high- and low-frequency interferometers are considered. As it is already the case in the existing experiments, like LIGO and Virgo, optically coated baffles are used to mitigate and suppress the noise inside the vacuum...
This talk describes an outreach exposition centered around a replica of the Alpha Magnetic Spectrometer Payload Operation Control Room (AMS POCC) as a means to help people comprehend the continuous monitoring and control of space mission payloads by various control rooms on Earth. The exposition's added value stems from the AMS collaboration's monitoring software development, enabling...
While the Standard Model predicts that the Higgs boson is a CP-even scalar, CP-odd contributions to the Higgs boson interactions with vector bosons and fermions are presently not strongly constrained. A variety of Higgs boson production processes and decays can be used to study the CP nature of the Higgs boson interactions. This talk presents the most recent results of such analyses by the...
The NA62 experiment at CERN collected the world's largest dataset of charged kaon decays in 2016-2018, leading to the first measurement of the branching ratio of the ultra-rare $K^+ \rightarrow \pi^+ \nu \bar\nu$ decay, based on 20 candidates. In this talk the NA62 experiment reports recent results from analyses of $K^+ \rightarrow \pi^0 e^+ \nu \gamma$, $K^+ \rightarrow \pi^+ \mu^+ \mu^-$ and...
The High Energy cosmic-Radiation Detection (HERD) facility, planned for launch in 2027 and is one of the scientific payloads on board of the Chiniese Space Station. HERD's primary scientific objectives covers several high energy astrophysics topics, including the search for dark matter annihilation products, precise measurements of the cosmic electron (and positron) spectrum beyond 10 TeV,...
The Any Light Particle Search II (ALPS II) is a Light-Shining-through-a-Wall experiment operating at DESY, Hamburg. Its goal is to probe the existence of Axions and Axion Like Particles (ALPs), possible candidates for dark matter. In the ALPS II region of interest, a rate of photons reconverting from Axions/ALPs on the order of $10^{-5}$ cps is expected. A first science run at lower...
We will gain unprecedented, high accuracy insights into internal structure of the atomic nucleus thanks to lepton-hadron collision studies in the coming years at the Electron-Ion-Collider (EIC) in the United States. A good control of radiative corrections is necessary for the EIC to be fully exploited and to extract valuable information from various measurements. However, there is a...
Measurements of direct photons provide valuable information on the properties of the quark-gluon plasma because they are colour-neutral and created during all phases of the collision. Sources of photons include initial hard scatterings, Bremsstrahlung and the fragmentation process, jet-medium interactions, and radiation from the medium. Direct thermal photons, produced by the plasma, are...
The smallness of neutrino masses is one of the most intriguing puzzles in the context of particle physics. One of the most natural ways to introduce naturally suppressed masses is the construction of dimension-5 effective operators, called Weinberg operators. In the presence of only the standard Higgs scalar doublet, these kinds of operators arise in the three usual seesaw models. In this...
Charged lepton flavor violation (CLFV) is an unambiguous signature of new physics. In the Belle experiment, we study various CLFV signatures, which include $\tau$ leptons in the final state. In this presentation, we report searches for CLFV in $\Upsilon(1S) \to \ell^{\pm}\ell^{\prime\mp}$ and $\chi_{bJ}(1P)\to \ell^{\pm}\ell^{\prime\mp}$ decays, where $\ell,\ell^\prime =e, \mu, \tau$ using ...
Supersymmetric models with low electroweak fine-tuning are more prevalent on the string landscape than fine-tuned models. We assume a fertile patch of landscape vacua containing the minimal supersymmetric standard model (MSSM) as a low-energy EFT. Such models are characterized by light higgsinos in the mass range of a few hundred GeV whilst top squarks are in the 1-2.5 TeV range. Other...
ScienzaPerTutti(*), literally ScienceForAll, is the web portal dedicated to Physics education and popularization of science curated by INFN Italian National Institute for Nuclear Physics’ researchers. The contents are mainly addressed to High School students and teachers and are designed to engage the audience with the main topics of modern research in particle and nuclear physics, theoretical...
We discuss recent results of Higgs boson measurements with the CMS experiment, where the Higgs boson has high transverse momentum and its decay products are merged. Several production modes and final state channels are presented.
The IceCube Neutrino Observatory has detected neutrinos from various astrophysical sources with its 1km3 detector volume in Antarctic ice. IceTop, the cosmic-ray detector on the surface of IceCube, consists of 81 pairs of ice-Cherenkov tanks. The rise in threshold of measurements due to accumulating snow inspired the next generation of South Pole detectors comprising of elevated...
We discuss a TeV scale extension of the Standard Model in which a dark sector seeds neutrino mass generation radiatively within the linear seesaw mechanism. Since symmetry prevents tree-level contributions, tiny neutrino masses are generated at one-loop from spontaneous lepton number violation by the small vacuum expectation value of a Higgs triplet. The model can have sizeable rates for...
Photonuclear reactions are induced by the strong electromagnetic field generated by ultrarelativistic heavy-ion collisions. These processes have been extensively studied in ultraperipheral collisions, in which the impact parameter is larger than twice the nuclear radius. In recent years, the observation of coherent J/$\psi$ photoproduction has been claimed in nucleus--nucleus (A--A) collisions...
We evaluate the cross section for diffractive bremsstrahlung of a single photon in the $pp \to pp \gamma$ reaction at high energies and at forward photon rapidities. Several differential distributions, for instance, in ${\rm y}$, $k_{\perp}$ and $\omega$, the rapidity, the absolute value of the transverse momentum, and the energy of the photon, respectively, are presented. We compare the...
The existence of the magnetic monopole has eluded physicists for centuries. The NOvA Far Detector (FD), used for neutrino oscillation searches, also has the ability to identify magnetic monopoles. With a surface area of 4,100 m$^2$ and a location near the earth’s surface, the 14 kt FD provides us with the unique opportunity to be sensitive to potential low-mass monopoles unable to penetrate...
Electric dipole moments (EDMs) of elementary particles are powerful probes of CP-violating New Physics (NP). In the context of a general two-Higgs doublet model (2HDM) which due to lack of any ad hoc discrete symmetry possesses complex extra Yukawa couplings that can help explain baryon asymmetry of the Universe (BAU), we discuss their NP contribution to EDMs of lepton and quarks. In...
Neutron spectroscopy is an invaluable tool for many scientific and industrial applications, including searches for dark matter. In deep underground dark matter experiments, neutron induced background produced by cosmic ray muons and natural radioactivity, may mimic a signal. However, neutron detection techniques are complex and, thus, measurements remain elusive. Use of $^3$He based detectors...
The graphical program FeynGame is introduced, which allows didactic access to Feynman diagrams in a playful way. It offers didactic approaches for different levels of experience: from games involving simple clicking and drawing, to practicing the theory of fundamental interactions, to the mathematical representation of scattering amplitudes.
For the specialist, FeynGame may also represent a...
I will present some of the results obtained regarding the emergence of decoherence in neutrino oscillations. In our model all the particles, including the source and detector, are treated dynamically and evolved consistently with Quantum Field Theory; decoherence can emerge naturally given the time evolution of the initial state and the final state considered.
We have shown that some of...
The Baikal-GVD is a large neutrino telescope being under construction in Lake Baikal. Recently it is the largest neutrino telescope operating in Northern Hemisphere. The result of the winter expedition of 2023 is the three-dimensional array of 3 456 photo-sensitive units (optical modules). The data collection is allowed by the design of the experiment while being in a construction phase. In...
We give a general prescription for the transformation between four-fermion effective operator bases via corrected Fierz identities at the one-loop level. The procedure has the major advantage of only relating physical operators between bases, eliminating the necessity for Fierz-evanescent operators, thereby reducing the number of operators which enter in higher-order EFT computations....
We report progress on the inclusive hadroproduction of a Higgs+jet system at LHC and FCC collision energies. Kinematic sectors explored fall into the so-called semi-hard regime, where both the fixed-order and the high-energy dynamics come into play. We propose a novel version of a matching procedure aimed at combining NLO fixed-order computations, as obtained from POWHEG, with the NLL...
One of the main challenges in nuclear physics is studying the structure of the atomic nucleus. Recently, it has been shown that high-energy heavy-ion collisions at RHIC and the LHC can complement low-energy experiments. Heavy-ion collisions provide a snapshot of the nuclear distribution at the time of collisions, offering a unique and precise probe of the nuclear structure.
This talk...
LaBr3:Ce crystals have been introduced for radiation imaging in medical
physics, with photomultiplier or single SiPM readout. An R & D was pursued
using 1” LaBr3:Ce to realize compact large area detectors with SiPM array readout, aiming at high light yields, good energy resolution, good detector linearity and fast time response for low-energy X-rays. A natural application was found inside...
We discuss production of far-forward $D$ mesons/antimesons and neutrinos/antineutrinos from their semileptonic decays in proton-proton collisions at the LHC energies. We include the gluon-gluon fusion $gg \to c\bar{c}$, the intrinsic charm (IC) $gc \to gc$ as well as the recombination $gq \to Dc$ partonic mechanisms. The calculations are performed within the $k_T$-factorization approach and...
The 2023 Giuseppe and Vanna Cocconi Prize is awarded to the SDSS/BOSS/eBOSS collaborations for their outstanding contributions to observational cosmology, including the development of the baryon acoustic oscillation measurement into a prime cosmological tool, using it to robustly probe the history of the expansion rate of the Universe back to 1/5th of its age providing crucial information on...
The 2023 Gribov Medal is awarded to Netta Engelhardt for her groundbreaking contributions to the understanding of quantum information in gravity and black hole physics.
The 2023 Young Experimental Physicist Prize of the High Energy and Particle Physics Division of the EPS is awarded to Valentina M. M. Cairo for her outstanding contributions to the ATLAS experiment: from the construction of the inner tracker, to the development of novel track and vertex reconstruction algorithms and to the searches for di-Higgs boson production.
“The modeling of the soft radiation in MC approaches and the inclusion of the intrinsic kT effect in a consistent and “simple” way is one of the successes of the Parton Branching TMD approach. In this approach, a consistent treatment of the Parton Shower evolution and the TMD evolution is carried out by the PB-TMD initial state shower. In this talk, the azimuthal correlation, φ12, of high...
We consider threshold effects of thermal dark matter (DM) pairs (fermions and antifermions) interacting with a thermal bath of dark gauge fields in the early expanding universe. Such threshold effects include the processes of DM pairs annihilating into the dark gauge fields (light d.o.f.) as well as electric transitions between pairs forming a bound state or being unbound but still feeling...
In this talk, the latest results from the CMS experiment on inclusive and simplified template cross section measurements of the Higgs boson are discussed. We cover the latest measurements for the fermionic decay channels in this presentation. Measurements of the Higgs boson couplings in the fermionic Higgs boson decay channels are also presented.
Light-flavour hadrons represent the bulk of particles produced in high-energy hadronic collisions at the LHC.
Measuring their pseudorapidity dependence provides information on the partonic structure of the colliding hadrons. It is, in particular at LHC energies sensitive to non-linear QCD evolution in the initial state.
In addition, measurements of light-flavour hadron production in small...
With the restart of the proton-proton collision program in 2022 (Run-3) at the Large Hadron Collider (LHC), the ATLAS detector aims to double the integrated luminosity accumulated during the ten previous years of operation. After this data-taking period the LHC will undergo an ambitious upgrade program to be able to deliver an instantaneous luminosity of $7.5\times 10^{34}$ cm$^{-2}$ s$^{-1}$,...
We study the impact of three different BSM models in the charge asymmetry defined for the 2SS$\ell$ (with $\ell= e, \mu$) with jets ($n_j\geq2$) final state at the LHC, at $\sqrt{s}=13$ TeV, where the main SM contribution is the $t\bar{t}W$ production. We consider the impact of a heavy neutral scalar/pseudoscalar arising from a 2HDM model; a simplified RPV MSSM model with electrowikino...
The KM3NeT Collaboration is incrementally building a network of water-Cherenkov neutrino observatory in the Mediterranean Sea, consisting of two telescopes, named ARCA (Astroparticle Research with Cosmics in the Abyss) and ORCA (Oscillation Research with Cosmics in the Abyss), sharing the same detection technology. ARCA, located off the shores of Sicily, in its completed shape will be a...
Since 1983 the Italian groups collaborating with Fermilab (US) have been running a 2-month summer training program for Master students. While in the first year the program involved only 4 physics students, in the following years it was extended to engineering students. Many students have extended their collaboration with Fermilab with their Master Thesis and PhD.
The program has involved...
The study of strange particle production in heavy-ion collisions plays an important role in understanding the dynamics of the strongly interacting system created in the collision. The enhanced production of strange hadrons in heavy-ion collisions relative to that in pp collisions is historically one of the signatures of the formation of the quark-gluon plasma. The study of strangeness...
Multi-jet events at various kinematic regimes are subject of wide scaled studies in the LHC program and future colliders. Merging of TMDs, parton showers and matrix elements is a delicate matter that is sensitive to the process and observable of interest. We present studies of the merging scale in the TMD merging framework, using the Cascade3 Monte Carlo generator. The merging scale separates...
The REINFORCE EU (Research Infrastructures FOR Citizens in Europe) was a three- year long SwafS project which engaged citizens in active collaboration with the scientists working in large research infrastructures across Europe. The overall aim was to bridge the gap between them and reinforce society’s science capital. The citizen scientists had at their disposal data from four different...
The null results of dark matter at experiments motivate us to look beyond the usual freeze-out mechanisms, and work out the upper bound on the dark matter masses which could be probed at experiments. In this talk, we shall briefly overview different production mechanisms, and correspondingly upper bounds of dark matter in those scenarios. In addition, we shall focus on the exponential...
The ANTARES neutrino telescope was operational in the Mediterranean Sea from 2006 to 2022. The detector array, consisting of 12 lines with a total of 885 optical modules, was designed to detect high-energy neutrinos covering energies from a few tens of GeV up to the PeV range. Despite the relatively small size of the detector, the results obtained are relevant in the field of neutrino...
Detailed measurements of Higgs boson properties and its interactions can be performed using its decays into fermions, providing a key window into the nature of the Yukawa interactions. This talk presents the latest measurements of the Higgs boson properties in various leptonic (ττ, μμ) and quark (bb,cc) decay channels by the ATLAS experiment, using the full Run 2 pp collision dataset collected...
Charmonia have long been recognized as a valuable probe of the nuclear matter in extreme conditions, such as the strongly interacting medium created in heavy-ion collisions and known as quark-gluon plasma (QGP). At LHC energies, the regeneration process due to the abundantly produced charm quarks, was found to considerably affect measured charmonium observables. Comprehensive production...
At leading order in positron-proton collisions, a lepton scatters off a quark through virtual photon exchange, producing a quark jet and scattered lepton in the final state. The total transverse momentum of the system is typically small, however deviations from zero can be attributed to perturbative initial and final state radiations in the form of soft gluon radiation when the transverse...
Models of feebly-interacting Dark Matter (DM), potentially detectable in long-lived particle searches, have gained popularity due to the non-observation of DM in direct detection experiments. Unlike DM freeze-out, which occurs when the dark sector particles are non-relativistic, feebly-interacting DM is primarily produced at temperatures corresponding to the heaviest mass scale involved in the...
The IceCube Neutrino Observatory is a cubic-kilometer scale neutrino detector at the South Pole. IceCube consists of over 5000 photosensors deployed on cables deep in the Antarctic ice. The sensors detect neutrinos via the Cherenkov light emitted by secondary particles produced in neutrino interactions.
With the measurement of the isotropic astrophysical neutrino flux in the TeV-PeV energy...
The study of Higgs boson production in association with one or two top quarks provides a key window into the properties of the two heaviest fundamental particles in the Standard Model, and in particular into their couplings. This talk presents measurements of tH and ttH production in pp collisions collected at 13 TeV with the ATLAS detector using the full Run 2 dataset of the LHC.
The inner detector of the present ATLAS experiment has been designed and developed to function in the environment of the present Large Hadron Collider (LHC). At the ATLAS Phase-II Upgrade, the particle densities and radiation levels will exceed current levels by a factor of ten. The instantaneous luminosity is expected to reach unprecedented values, resulting in up to 200 proton-proton...
Electromagnetic probes such as photons and dielectrons (e$^{+}$e$^{-}$ pairs) are a unique tool to study the space-time evolution of the hot and dense matter created in ultra-relativistic heavy-ion collisions. They are produced at all stages of the collision with negligible final-state interactions. At intermediate dielectron invariant mass ($m_{\rm ee} > 1$ GeV/$c^{2}$), thermal radiation...
The war on Ukraine has affected significantly scientific cooperation and communication in particle physics and also in many other fields of scientific, cultural and educational exchange. Immediately after the war in Feb 2022, many scientific institutions paused or banned scientific cooperation and exchange with Russian and Belorusian institutes and their scientists. Publications were out on...
During the last 15 years the "Radio MontecarLow (“Radiative Corrections and Monte Carlo Generators for Low Energies”) Working Group, see www.lnf.infn.it/wg/sighad/, has been providing valuable support to the development of radiative corrections and Monte Carlo (MC) generators for low energy e+e- data and tau-lepton decays. Its operation which started in 2006 proceeded until the last few years...
Although the Standard Model is very successful, there are still open
problems which it cannot explain, one of it being dark matter (DM).
This has led to various Beyond Standard Model theories, of which Two
Higgs Doublet models are very popular, as they are one of the simplest
extensions and lead to a rich phenomenology. Further extensions with
a complex singlet lead to a natural DM...
Astrophysical hypotheses suggest the existence of neutrinos beyond the energy range currently reached by optical detectors (> 10 PeV). The observation of such particles by capturing the coher- ent emission of their interaction in ice, i.e. Askaryan radiation, is the aim of the Radio Neutrino Observatory in Greenland (RNO-G). Located at Summit Station, RNO-G represents the first neu- trino...
We present novel analyses on accessing the 3D gluon content of the proton via spin-dependent TMD gluon densities, calculated through the spectator-model approach. Our formalism embodies a fit-based spectator-mass modulation function, suited to catch longitudinal-momentum effects in a wide kinematic range. Particular attention is paid to the time-reversal even Boer-Mulders and the time-reversal...
In this talk, the latest results from the CMS experiment on inclusive and simplified template cross section measurements of the Higgs boson are discussed. We cover the latest measurements for the bosonic decay channels in this presentation. Measurements of the Higgs boson couplings in the bosonic Higgs boson decay channels are also presented.
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. These environments are key to improve accessibility and inclusion for students and researchers in developing...
Hypernuclei are bound states of nucleons and hyperons. The study of their properties, such as their lifetimes and binding energies, provide information on the hadronic interaction between hyperons and nucleons which are complementary to those obtained from correlation measurements. Precise modeling of this interaction is a fundamental input for the calculation of the equation of state of...
In the Standard Model, one doublet of complex scalar fields is the minimal content of the Higgs sector in order to achieve spontaneous electroweak symmetry breaking. However, several theories beyond the Standard Model predict a non-minimal Higgs sector and introduce charged scalar fields that do not exist in the Standard Model. As a result, singly- and doubly-charged Higgs bosons would be a...
Systematic Operator Product Expansions can be applied to the hadronic light-by-light tensor in those kinematic regimes where there is any large external Euclidean momentum. In this talk it is reviewed how this can be applied to the different kinematic regimes entering into the muon g-2 integral, shedding some light on the interplay of short-distance and long-distance contributions in the...
Continuous gravitational waves are long-duration gravitational-wave signals
that still remain to be detected.
These signals are expected to be produced by rapidly-spinning
non-axisymmetric neutron stars, and would provide valuable information on the
physics of such compact objects; additionally, they would allow us to probe the
galactic population of EM-dark neutron stars, whose...
We investigate ways of identifying two kinds of dark matter component particles at high-energy colliders. The strategy is to notice and
distinguish double-peaks(humps) in some final state observable. We
carried out our analysis in various popular event topologies for dark
matter search, such as mono-X and n-leptons+n-jets final state along
with missing energy/transverse momenta. It turns...
We present a novel method of extraction of the Collins-Soper kernel directly from the comparison of differential cross-sections measured at different energies. Using this method, we analyze the simulated data from the CASCADE event generator and extract the Collins-Soper kernel predicted by the Parton Pranching method in the wide range of transverse distances. Using the method, we also solve a...
The ATLAS Collaboration has developed a number of highly successful programmes featuring educational content for schools and universities, as well as communication strategies to engage the broader public. The ATLAS Open Data project has successfully delivered open-access data, simulations, documentation and related resources for education and outreach use in High Energy Physics and related...
The investigation of the quark content of hadrons has been a major goal of non-perturbative strong interaction physics. In the last decade, several resonances in the mass range 1000-2000 MeV/$c^2$ have emerged that cannot be explained by the quark model. The internal structure of exotic resonances such as $\rm f_0$, $\rm f_1$, and $\rm f_2$ is currently unknown. Different scenarios are...
With the emergence of advanced Si sensor technologies such as LGADs, it is now possible to achieve exceptional time measurement precision below 50 ps. As a result, the implementation of time-of-flight (TOF) particle identification for charged hadrons at future $e^{+}e^{-}$ Higgs factory detectors has gained an increasing attention. Other particle identification techniques require a gaseous...
The 5n-vector ensemble method is a statistical multiple test for the targeted search of continuous gravitational waves from an ensemble of known pulsars. This method can improve the detection probability combining the results from individually undetectable pulsars if few signals are near the detection threshold. In this presentation, I show the results of the 5n-vector ensemble method...
The cold dark matter (CDM) candidate with weakly interacting massive
particles can successfully explain the observed dark matter relic
density in cosmic scale and the large-scale structure of the Universe.
However, a number of observations at the satellite galaxy scale seem
to be inconsistent with CDM simulation.
This is known as the small-scale problem of CDM.
In recent years, it has...
Short-lived hadronic resonances are unique tools for studying the hadron-gas phase that is created in the late stages of relativistic heavy-ion collisions. Measurements of the yield ratios between resonances and the corresponding stable particles are sensitive to the competing rescattering and regeneration effects. These measurements in small collision systems, such as pp and p-Pb, are a...
The Transverse Momentum Dependent (TMD) Parton Branching (PB) method is a Monte Carlo (MC) framework to obtain QCD high energy collider predictions grounded in ideas originating from the TMD factorization. It provides an evolution equation for the TMD parton distribution functions and allows to use those within TMD MC generators.
In this work, we analyze the structure of the TMD PB Sudakov...
We present an overview of the most recent differential and fiducial Higgs boson cross section measurements from CMS. A variety of Higgs boson final states are covered.
The increase of the particle flux (pile-up) at the HL-LHC with instantaneous luminosities up to L ≃ 7.5 × 1034 cm−2s −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. A High...
Following the potential discovery of new heavy particles at the LHC or a future collider, it will be crucial to determine their properties and the nature of the underlying Physics. Of particular interest is the possibility of Beyond-the-Standard-Model (BSM) scalar trilinear couplings.
In this talk, I will consider as a specific example the scalar top (stop) trilinear coupling parameter,...
INFN Kids (*) is a science education project of the Italian National Institute for Nuclear Physics addressed to young people of Primary and Middle schools age. The initiative aims at raising children’s curiosity towards science with a focus on Physics, inspiring them with science by illustrating the different research fields that INFN is pursuing, the development in technologies along with the...
We present a selection of very recent results by the CMS collaboration on heavy-ion physics at the LHC (CERN).
Axion-like particles (ALPs) are leading candidates to explain the dark matter in the universe. Their production via the misalignment mechanism has been extensively studied for cosine potentials characteristic of pseudo-Nambu-Goldstone bosons. In this work we investigate ALPs with non-periodic potentials, which allow for large misalignment of the field from the minimum. As a result, the ALP can...
The Parton-Branching method (PB) allows the determination of Transverse Momentum Dependent (TMD) parton densities, which cover the region from very small to $k_T$. In the very small $k_T$ region, the contribution from the intrinsic motion of partons (intrinsic $k_T$) plays a role, but also contributions of very soft gluons, which are resummed in the evolution equation. A detailed study shows...
The CPT symmetry is one of the most fundamental symmetries in physics. Any violation of this symmetry would have profound implications for our understanding of the universe [1]. In this study, we report the CPT symmetry tests in 3$\gamma$ decays of polarised $^3$S$_{1}$ positronium using the Jagiellonian Positron Emission Tomography device. The J-PET experiment allows sensitive and precise...
Axion-like particles (ALPs) are gauge-singlet under the Standard Model (SM) and appear in many well-motivated extensions of the SM. Since they arise as pseudo-Nambu-Goldstone bosons of an approximate axion shift-symmetry, the masses of ALPs can naturally be much smaller than the energy scale of the underlying UV model, making them an attractive target for the Large Hadron Colloder (LHC) and...
The Higgs boson decay to two W bosons provides the largest branching fraction among bosonic decays, and can be used to perform some of the most precise measurements of the Higgs boson production cross sections. This talk presents Higgs boson fiducial and differential cross section measurements by the ATLAS experiment in the WW decay channel, targeting both the gluon-gluon fusion and...
The LHCb experiment has been upgraded during the second long shutdown of the Large Hadron Collider at CERN, and the new detector is currently operating at the LHC. The Vertex Locator (VELO) is the detector surrounding the interaction region of the LHCb experiment and is responsible of reconstructing the proton-proton collision (primary vertices) as well as the decay vertices of long-lived...
The center-of-mass energies available at modern accelerators, such as the Large Hadron Collider (LHC), and at future generation accelerators, such as the Electron-Ion Collider (EIC) and Future Circular Collider (FCC), offer us a unique opportunity to investigate hadronic matter under the most extreme conditions ever reached. One of the most intriguing phenomena of strong interaction is the...
The first observation of gravitational waves (GWs) with laser interferometers of the LIGO collaboration in 2015 was about 100 years after their prediction within general relativity. In this talk we focus on the detection of gravitational waves in a higher frequency regime with superconducting radio frequency (SCRF) cavities. This approach has already been considered as probes for GWs before...
QCD calculations for collider physics make use of perturbative solutions of renormalisation group equations (RGEs). RGE solutions can contribute significantly to systematic uncertainties of theoretical predictions for physical observables. We propose a method to express these systematic effects in terms of resummation scales, using techniques borrowed from soft-gluon resummation approaches. We...
he MEG II experiment, which focuses on investigating Charged Lepton Flavour Violation in muon decays, completed the commissioning of all subdetectors in time for the 2021 run. Recently, it concluded the second year of data collection at the Paul Scherrer Institut (CH).
The experimental apparatus has been specifically designed to search for $\mu^+ \rightarrow e^+ \gamma$ decays, aiming for a...
The high-luminosity upgrade of the LHC (HL-LHC) brings unprecedented requirements for real-time and precision bunch-by-bunch online luminosity measurement and beam-induced background monitoring. A key component of the CMS Beam Radiation Instrumentation and Luminosity (BRIL) system is a stand-alone luminometer, the Fast Beam Condition Monitor (FBCM), which is fully independent from the CMS...
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. These include updates to previous Run 1 measurements using the full LHCb Run 1+2 data sample and the latest LHCb gamma & charm mixing combination.
Simplified template cross-sections provide a detailed description of the properties of Higgs boson production at the LHC. They are most precisely determined in the combination of the measurements performed in the different Higgs boson decay channels. This talk presents these combined measurements, as well as their interpretations in the context of specific scenarios of physics beyond the...
The HERAPDF2.0 ensemble of parton distribution functions (PDFs) was introduced in 2015. The final stage is presented, a next-to-next-to-leading-order (NNLO) analysis of the HERA data on inclusive deep inelastic ep scattering together with jet data as published by the H1 and ZEUS collaborations. A perturbative QCD fit, simultaneously of αS(M2Z) and and the PDFs, was performed with the result...
DarkSide-50 is an experiment for direct dark matter detection at Laboratori Nazionali del
Gran Sasso. It uses a dual-phase time projection chamber filled with low-radioactivity argon extracted from underground. Thanks to single electron sensitivity and with an analysis based on the sole ionization signal, Darkside-50 set the most stringent exclusion limit on WIMPs with a mass of few...
The IceCube Neutrino Observatory has measured the high-energy astrophysical neutrino flux but has not yet detected prompt atmospheric neutrinos originating from charmed meson decays. Understanding the prompt neutrino flux is crucial for improving models of high-energy hadronic interactions and advancing astrophysical neutrino measurements. We present a combined analysis of cascades and...
T2K is a long baseline neutrino experiment which exploits a neutrino and antineutrino beam produced at the Japan Particle Accelerator Research Centre (J-PARC) to provide world-leading measurements of the parameters governing neutrino oscillation. Neutrino oscillations are measured by comparing neutrino rates and spectra at a near detector complex, located at J-PARC, and at the water-Cherenkov...
This talk will summarize the latest results on branching fractions and CP violation in the B->DX family of decays.
In the decade since the discovery of the Higgs boson, its properties have been measured in detail, and appear to be consistent with the expectation of the Higgs boson in the SM. However, anomalous contributions to the Higgs boson couplings are not excluded. In this talk we review the most recent results from the CMS experiment on anomalous Higgs boson couplings. Interpretations of such...
XENONnT is the follow-up to the XENON1T experiment aiming for the direct detection of dark matter in the form of weakly interacting massive particles (WIMPs) using a liquid xenon (LXe) time projection chamber (TPC). The detector, operated at Laboratori Nazionali del Gran Sasso (LNGS) in Italy, features a total LXe mass of 8.5 tonnes of which 5.9 tonnes are active. XENONnT has completed its...
The NOνA experiment is a long-baseline, off-axis neutrino experiment that aims to study the mixing behavior of neutrinos and antineutrinos using the Fermilab NuMI neutrino beam near Chicago, IL. The experiment collects data at two functionally identical detectors, the Near Detector is near the neutrino production target at Fermilab; the 14 kt Far Detector is 810 km away in Ash River, MN. Both...
We investigate the kinematical regions that are important for producing prompt neutrinos in the atmosphere and in the forward region of the LHC, as probed by different experiments. We illustrate the results in terms of the center-of-mass nucleon-nucleon collision energies and rapidities of neutrinos and of the parent heavy-flavoured hadrons. We find overlap in only part of the kinematic space...
The International Large Detector (ILD) is a detector designed primarily for the International Linear Collider (ILC), a high-luminosity linear electron-positron collider with an initial center-of-mass energy of 250 GeV, extendable to 1 TeV.
The ILD concept is based on particle flow for overall event reconstruction, which requires outstanding detector capabilities including superb tracking,...
The production of jets and prompt isolated photons at hadron colliders provides stringent tests of perturbative QCD. The latest measurements by the ATLAS experiment, using proton-proton collision data at $\sqrt{s}$ =13 TeV, are presented. Prompt inclusive photon production is measured for two distinct photon isolation cones, R=0.2 and 0.4, as well as for their ratio. The measurement is...
The role of the Parton Distribution Functions (PDF) is crucial not only in the precise determination of the SM parameters, but also in the interpretation of new physics searches at the LHC. In this talk we show the potential of global PDF analyses to inadvertently ‘fit away’ signs of new physics, by identifying specific scenarios in which the PDFs may completely absorb signs of new physics,...
The Circular Electron Positron Collider (CEPC) was been proposed as a Higgs and high luminosity Z factory in last few years. The detector conceptual design of a updated detector consists of a tracking system, which is a high precision (about 100μm) spatial resolution Time Projection Chamber (TPC) detector as the main track device in very large 3D volume. The tracking system required the high...
Novel technologies emerging from the second quantum revolution enable us to identify, control and manipulate individual quanta with unprecedented precision. One important area is the rapidly evolving new paradigm of quantum computing, which has the potential to revolutionize computing by operating on completely different principles. Expectations are high, as quantum computers have already...
We analyse the sensitivity to beyond-the-Standard-Model effects of hadron collider processes involving the interaction of two electroweak and two Higgs bosons, VVHH, with V being either a W or a Z boson.
We examine current experimental results by the CMS collaboration in the context of a dimension-8 extension of the Standard Model in an effective-field-theory formalism. We show that...
LUX-ZEPLIN (LZ) is a direct detection dark matter experiment hosted in the Davis Campus of the Sanford Underground Research Facility in Lead, South Dakota. LZ's central detector is a dual-phase time projection chamber utilizing 7 active tonnes of liquid xenon (LXe) and is aided by a LXe "skin" detector and liquid scintillator-based outer detector to veto events inconsistent with dark matter...
Duration" 15'+5'
A large fraction of the top quarks produced at the LHC emerges from electroweak interactions, via the so-called t-channel single-top production.
Predictions for this process can be used, for instance, to constrain
the CKM matrix element, and probe possible anomalous couplings
in the tWb vertex. QCD corrections to t-channel single-top production
are known up to NNLO...
In recent years, the IceCube Neutrino Observatory has started to unravel the high-energy neutrino sky. The discoveries of TXS0506+056 and NGC1068 as neutrino emitters and neutrino emission from the galactic plane hint at a zoo of possible neutrino sources. However, open questions regarding the production mechanisms remain that require a new generation of neutrino telescopes to answer.
The...
In the current epoch of neutrino physics, many experiments are aiming for precision measurements of oscillation parameters. Thus, various new physics scenarios which alter the neutrino oscillation probabilities in matter deserve careful investigation. Recent results from NOvA and T2K show a slight tension on their reported values of the CP violating phase $\delta_{CP}$. Since the baseline of...
The study of CP violation in charmless B decays is of great interest as penguin and tree-level topologies contribute to the decay amplitudes with comparable strengths. The former topologies may be sensible to new particles appearing in the loops as virtual contributions. However the interpretation of physics quantities in terms of CKM parameters is not trivial due to strong-interaction effects...
Singular elements associated with the QCD factorization in the collinear limit are key ingredients for high-precision calculations in particle physics. They govern the collinear behaviour of scattering amplitudes, as well as the perturbative energy evolution of PDFs and FFs. In this talk, we explain the computation of multiple collinear and higher-order QCD splittings with massive partons. Our...
Dark compact objects, like primordial black holes, can span a large range of masses depending on their time and mechanism of formation. In particular, they can have subsolar masses and form binary systems with an inspiral phase that can last for long periods of time. Additionally, these signals have a slow increase of frequency, and, therefore, are well suited to be searched with continuous...
Duration: 15'+5'
We compare double-differential normalized production cross-sections for top-antitop + X hadroproduction at NNLO QCD accuracy, as obtained through a customized version of the MATRIX framework interfaced to PineAPPL, with recent data by the ATLAS and the CMS collaborations.
We take into account theory uncertainties due to scale variation and we see how predictions vary as a...
Precision measurements of diboson production at the LHC is an important probe of the limits of the Standard Model. The gluon-fusion channel of this process offers a connection between the Higgs and top sectors. We study in a systematic way gluon-induced diboson production in the Standard Model Effective Field Theory. We compute the helicity amplitudes of double Higgs, double $Z/W$ and...
Cryogenic Rare Event Search with Superconducting Thermometers (CRESST) is a direct detection dark matter (DM) search experiment located at Laboratori Nazionali del Gran Sasso (LNGS) in Italy. The experiment employs cryogenic and scintillating crystals to search for nuclear recoils from DM particles, and has repeatedly achieved thresholds below 100 eV in its third phase (CRESST III) for a wide...
This work introduces a comprehensive framework and discussion on the measurement of scientific understanding in agents, encompassing both humans and machine learning models. The focus is on artificial understanding, particularly investigating the extent to which machines, such as Large Language Models (LLMs), can exhibit scientific understanding. The presentation centers around fundamental...
We report on the latest measurement of atmospheric neutrino oscillation parameters using data from the IceCube Neutrino Observatory. The DeepCore array in the central region of IceCube enables the detection and reconstruction of atmospheric neutrinos at energies as low as $\sim5$ GeV. This energy threshold allows the measurement of muon neutrino disappearance over a wide range of baselines...
A large, worldwide community of physicists is working to realize
an exceptional physics program of energy-frontier, electron-positron
collisions with the International Linear Collider (ILC)
and other collider projects (summarized and evaluated in
https://arXiv.org/abs/2208.06030). The International Large Detector (ILD) is one of the proposed detector concepts at the next \ee collider. The...
The investigation of $B$-meson decays into charmed and charmless hadronic final states is a keystone of the Belle II program. It offers theoretically reliable and experimentally precise constraints on CKM unitarity, it is sensitive to effects from non-SM physics, and it furthers knowledge about uncharted $b \to c$ hadronic transitions. Recent results on branching ratios and direct CP-violating...
One of the main obstacles to the calculation of next-to-next-to-leading order (NNLO) corrections in QCD is the presence of infrared singularities. Together with Raoul Röntsch, Kirill Melnikov and other collaborators, I am developing a more general approach to the nested soft-collinear subtraction method to address this problem for the production of an arbitrary final state at hadron colliders....
While simulation plays a crucial role in high energy physics, it also consumes a significant fraction of the available computational resources, with these computing pressures being set to increase drastically for the upcoming high luminosity phase of the LHC and for future colliders. At the same time, the significantly higher granularity present in future detectors increases the physical...
We discuss rare Higgs boson production and decay channel searches with the CMS experiment. A particular focus of this talk are searches for very rare Higgs boson decays to a neutral light meson or quarkonium and a photon or Z boson, whose standard model branching fraction predictions are in the range 10^{-4}-10^{-9}. Such searches can help constrain Yukawa couplings to light and charm quarks....
The current and upcoming generations of gravitational wave experiments represent an exciting step forward in terms of detector sensitivity and performance. Key upgrades at the LIGO, Virgo and KAGRA facilities will see the next observing run (O4) probe a spatial volume around four times larger than the previous run (O3), and design implementations for e.g. the Einstein Telescope, Cosmic...
The Super-Kamiokande experiment (Super-K) is a water Cherenkov detector in Japan. It has been collecting atmospheric neutrino events in ultrapure water from 1996 to 2020, after which it was upgraded with the addition of Gadolinium sulfate in the water. Tau neutrinos are not expected in the atmospheric neutrino flux below 10 GeV unless they appear from the oscillation of atmospheric muon...
With its increasing statistical significance, the DAMA/LIBRA annual modulation signal is a cause for tension in the field of dark matter direct detection. A possible standard dark matter explanation for this signal is highly incompatible with the null results of numerous other experiments. The COSINUS experiment aims at a model-independent cross-check of the DAMA/Libra signal claim.
For such...
A precise measurement of the luminosity is a crucial input for many ATLAS physics analyses, and represents
the leading uncertainty for W, Z and top cross-section measurements. The first ATLAS luminosity determination in Run-3 of the LHC, for the dataset recorded in 2022, at center-of-mass energy of 13.6TeV follows the procedure developed in Run-2 of the LHC. It is based on van der Meer scans...
Duration: 15+5'
The comparison of theory predictions and experimental measurements is one of the main roads for discovering physics beyond the Standard Model. The tremendous amount of data that has been and will be further collected at the LHC already demands a high level of precision from the theory predictions.
In this talk I will focus on ttZ production, whose phenomenological interest is...
Deep learning methods are becoming key in the data analysis of particle physics experiments. One clear example is the improvement of neutrino detection using neural networks. Current neutrino experiments are leveraging these techniques, which, in combination, have exhibited to outperform standard tools in several domains, such as identifying neutrino interactions or reconstructing the...
The Daya Bay reactor neutrino experiment is the first experiment that measured a non-zero value for the neutrino mixing angle $\theta_{13}$ in 2012. Antineutrinos from six 2.9 GW$_{\text{th}}$ reactors were detected in eight identically designed detectors deployed in two near and one far underground experimental halls. The near-far arrangement in km-scale baselines of anti-neutrino detectors...
The NEWS-G collaboration is searching for light dark matter candidates using a novel gaseous detector concept, the spherical proportional counter. Access to the mass range from 0.05 to 10 GeV is enabled by the combination of low energy threshold, light gaseous targets (H, He, Ne), and highly radio-pure detector construction. Initial NEWS-G results obtained with SEDINE, a 60 cm in diameter...
A key focus of the physics program at the LHC is the study of head-on proton-proton collisions. However, an important class of physics can be studied for cases where the protons narrowly miss one another and remain intact. In such cases, the electromagnetic fields surrounding the protons can interact producing high-energy photon-photon collisions. Alternatively, interactions mediated by the...
Dust particles (diameter ≳0.5um) present inside the clean environments of the ground based interferometric detectors of gravitational waves can contribute to scatter light significantly, adding to the residual scattering originated by imperfections of high quality optical components. Stray light, i.e. light that leaves the main optical beam, picks up phase noise by reflecting off of...
The ALICE Collaboration proposes a completely new apparatus, ALICE 3, for the LHC Runs 5 and 6 (arXiv:2211.02491). The detector consists of a large pixel-based tracking system covering eight units of pseudorapidity, complemented by multiple systems for particle identification, including silicon time-of-flight layers, a ring-imaging Cherenkov detector, a muon identification system, and an...
The near detector of T2K (ND280) is undergoing a major upgrade. A new scintillator tracker, named superFGD, with fine granularity and 3D-reconstruction capabilities has been assembled at J-PARC. The new Time Projection Chambers are under construction, based on the innovative resistive Micromegas technology and a field cage made of extremely thin composite walls. New scintillator panels with...
I will summarise recent progress in the formulation of flavour mixing and oscillations in pseudo-Hermitian quantum theories with non-Hermitian mass mixing matrices [arXiv: 2302.11666]. Such non-Hermitian quantum theories are made viable by the existence of a discrete anti-linear symmetry of the Hamiltonian, which ensures that single-particle states have real energies. I will describe the...
This talk presents the latest ATLAS measurements of collective phenomena in various collision systems, including pp collisions at 13 TeV, Xe+Xe collisions at 5.44 TeV, and Pb+Pb collisions at 5.02 TeV. These include measurement of vn-[pT] correlations in pp, Xe+Xe, and Pb+Pb, which carry important information about the initial-state geometry of the Quark-Gluon Plasma, provide an insight as to...
Rare Higgs boson production and decay modes provide a crucial probe of Higgs boson properties if potential deviations from the predictions of the Standard Model. In this presentation, the latest results of measurements of rare Higgs boson production and decay modes by the ATLAS experiment are shown using the large data samples collected in pp collisions at 13 TeV during Run 2 of the LHC.
15'+5'
Measuring the mixing phases of the B0 and Bs mesons is very important to validate the CP violation paradigm of the Standard Model and to search for new physics beyond it. Golden modes to measure these quantities are those governed by tree-level $b\to c\bar{c}q$ transitions, that allow precise and theoretically clean determinations to be performed. Besides, measuring the mixing phases with...
FASER, the ForwArd Search ExpeRiment, is an LHC experiment located 480 m downstream of the ATLAS interaction point, along the beam collision axis. FASER was designed, constructed, installed, and commissioned during 2019-2022 and has been taking physics data since the start of LHC Run 3 in July 2022. This talk will present the status of the experiment, including detector design, detector...
The proposed Circular Electron Positron Collider (CEPC) imposes new challenges for the vertex detector in terms of pixel size and material budget. A Monolithic Active Pixel Sensor (MAPS) prototype, TaichuPix, based on a data-driven structure and a column drain readout architecture, has been implemented to achieve high spatial resolution and fast readout. In December 2022, a beam test system of...
The Deep Underground Neutrino Experiment (DUNE) is a next generation long baseline neutrino experiment for oscillation physics and proton decay studies. The primary physics goals of the DUNE experiment are to perform neutrino oscillation physics studies, search for proton decay, detect supernova burst neutrinos, make solar neutrino measurements and BSM searches. The liquid argon prototype...
Studies have yielded strong evidence that a deconfined state of quarks and gluons, the quark--gluon plasma, is created in heavy-ion collisions. This hot and dense matter exhibits almost zero friction and a strong collective behavior. An unexpected collective behavior has also been observed in small collision systems. In this talk, the origin of collectivity in small collision systems is...
The radiation pattern within high energy quark and gluon jets (jet substructure) is used extensively as a precision probe of the strong force as well as an environment for optimizing event generators for nearly all tasks in high energy particle and nuclear physics. While there has been major advances in studying jet substructure at hadron colliders, the precision achievable by collisions...
15'+5'
We present searches for exotic decays of the Higgs boson with the CMS experiment. Searches where the 125 GeV Higgs boson decays into two low-mass scalars are discussed. We also present searches for the 125 GeV Higgs boson decaying to a Z boson and a low-mass scalar. Searches for invisibly decaying Higgs bosons are also covered.
One of the most severe bottlenecks to reach high-precision predictions in QFT is the calculation of multiloop multileg Feynman integrals. Several new strategies have been proposed in the last years, allowing impressive results with deep implications in particle physics. Still, the efficiency of such techniques starts to drastically decrease when including many loops and legs. In this talk, we...
Many extensions of the Standard Model with Dark Matter candidates predict new long-lived particles (LLP). The LHC provides an unprecedented possibility to search for such LLP produced at the electroweak scale and above. The ANUBIS concept foresees instrumenting the ceiling and service shafts above the ATLAS experiment with tracking stations in order to search for LLPs with decay lengths of...
We investigate the impact of the recently released FNAL-E906 (SeaQuest) data concerning the ratio of proton-deuteron and proton-proton DY production cross-sections on the sea quark PDFs. We find that they have constraining power on the light-quark sea isospin asymmetry (dbar-ubar)(x) and on the (dbar/ubar)(x) ratio at large longitudinal momentum fraction x values, that they are particularly...
Event classifiers based either on the charged-particle multiplicity or on event topologies, such as spherocity and Underlying Event, have been extensively used in proton-proton (pp) collisions by the ALICE Collaboration at the LHC. These event classifiers became very useful tools since the observation of fluid-like behavior in high multiplicity pp collisions, for example radial and anisotropic...
The ALICE collaboration is planning to install the next upgrade of the Inner Tracking System (ITS3) during the LHC Long Shutdown 3 (2026-2028). The aim of this upgrade is to reduce material budget of the three innermost layers from 0.3% of a radiation length $X_0$ to 0.05% $X_0$ per layer, essentially reducing it to the silicon contribution only. In order to achieve this, the layers of the...
Searches for additional Higgs bosons at masses above 60 GeV with the CMS experiment are presented. A variety of final states, such as decays into pairs of photons or pairs of tau leptons, are discussed. We also cover searches for additional Higgs bosons which decay into pairs of 125 GeV Higgs bosons, or a 125 GeV Higgs boson and another particle.
Recently there has been a huge research activity on the interplay between symmetries and entanglement, exploiting the block-diagonal structure of the reduced density matrix (RDM) in each charge sector. The goal of this talk is to study how the presence of a global U(1) charge affects the modular flow, a central object in the algebraic description of quantum field theory. Roughly speaking, the...
The usual unitarity triangles of either the $3\times 3$ CKM quark flavor mixing matrix or the $3\times 3$ PMNS lepton flavor mixing matrix are not fully rephasing-invariant, although their areas are all equal to a half of the corresponding Jarlskog invariant of CP violation. Here we propose the novel "rescaled unitarity triangles" (RUTs), whose sides are completely rephasing-invariant and...
We will present the operational status of the milliQan Run 3 detector, which was installed during the 2022-3 YETS and is presently being commissioned. We will available initial results from data obtained with Run 3 LHC Collisions.
Recent measurements of high multiplicity pp collisions at LHC energies have revealed that these systems exhibit features similar to quark-gluon plasma, such as presence of radial and elliptic flow, and strangeness enhancement, traditionally believed to be only achievable in heavy nucleus-nucleus collisions at high energy. To pinpoint the origin of these phenomena and to bring all collision...
We present recent updates in the xFitter software framework for global fits of parton distribution functions (PDFs) in high-energy physics. Our focus is on investigating the sensitivity to Z boson couplings using the forward-backward asymmetry in Drell-Yan production. By utilizing an effective approach and simulated data, we assess the accuracy of these couplings, specifically considering the...
The Jiangmen Underground Neutrino Observatory (JUNO) is a 20-kiloton multi-purpose liquid scintillator detector under construction in a 700-meter underground laboratory in China. With its excellent energy resolution, sizeable fiducial volume, and remarkable background control, JUNO presents unique prospects to explore many important topics in neutrino and astroparticle physics.
By measuring...
Duration: 15'+5'
The precise measurement of the properties of the top quark are among the most important goals of the LHC. The signature of top quarks can only be measured through their decay products, which are almost exclusively a W-boson and a b-quark, and unbiased measurements of the top-quark pair production process are therefore performed in the final state of two W-bosons and two...
New narrow resonances are a generic signature of models of new phenomena beyond the Standard Model. The clean signatures of the final states composed of two photons or a Z boson and a photon provide sensitivity to a wide class of such signals, in particular axion-like particles (ALPs) and Higgs-like scalar particles. The results of several such searches by the ATLAS experiment are presented...
The LHCb detector is set to undergo a significant upgrade during the
upcoming long shutdown 4 of the LHC. This upgrade will result in
a nearly tenfold increase in instantaneous luminosity, reaching $1.5
\times 10^{34} c m^{-2} s^{-1}$, with an integrated luminosity expected
to rise from $50 f b^{-1}$ to $300 f b^{-1}$. To effectively handle
the elevated track densities, the downstream...
Entropy is the most innovative concept in thermodynamics. However, it seems that entropy has been defined and computed conveniently in each context, and that a unified definition of entropy for general relativistic field theory has not been established.
Recently, the author and collaborators have proposed a unified method to construct entropy current and entropy density as a conserved current...
Charm physics, involving a heavy up-type quark, offers a pathway to search for new particles and couplings beyond the Standard Model complementary to that of B physics. A program based on precision measurements of charm lifetimes is now underway at Belle II, and benefits from the detector's outstanding vertexing performance and low-background environment. Recent results from measurements of...
The production of dijet events containing at least two jets is among the largest cross sections at the LHC, with QCD predictions directly sensitive to the strong coupling constant. Dijet cross section measurements from ATLAS and CMS, at center-of-mass energies of 7, 8 and 13 TeV are exploited for the determination of the strong coupling constant, using state-of-the-art next-to-next-to-leading...
A systematic treatment of electromagnetic and strong corrections to the semi-leptonic decays is needed in order to have a precise determination of phenomenological parameters of the Standard Model (SM), such as CKM matrix elements. Under the presence of QED, the matrix element associated to the effective semi-leptonic operator on the lattice has to be renormalised, thus requiring a matching to...
The Jiangmen Underground Neutrino Observatory (JUNO) is a multi-purpose experiment, which is under construction in South China. Thanks to the 20 ktons of ultra-pure liquid scintillator (LS), JUNO will be able to perform innovative and groundbreaking measurements like the determination of neutrino mass ordering (NMO). Beyond NMO, JUNO will measure the three neutrino oscillation parameters with...
Signal reduction is the most important radiation damage effect on performance of silicon tracking detectors in ATLAS. Adjusting sensor bias voltage and detection threshold can help in mitigating the effects but it is important to have simulated data that reproduce the evolution of performance with the accumulation of luminosity, hence fluence. ATLAS collaboration developed and implemented an...
Duration: 15'+5'
The simulation of processes involving heavy unstable particles, like the top quark, holds significant importance in LHC physics. In this contribution, we address the exclusive simulation of top-quark pair production with dileptonic decays, including the non-resonant diagrams, interferences, and off-shell effects arising from the finite top-quark width. Our simulations,...
The trilinear Higgs coupling $\lambda_{hhh}$ is a crucial tool to probe the structure of the Higgs potential and to search for possible effects of physics beyond the Standard Model (SM). Focusing on the Two-Higgs-Doublet Model as a concrete example, I will discuss the calculation of the leading two-loop corrections to $\lambda_{hhh}$, and show that this coupling can be significantly enhanced...
The parameters space for Weakly-Interacting-Massive-Particles as possible explanation for Dark Matter, is shrinking more and more. This triggered new attempts to create dark matter at accelerators. This alternative approach represents an innovative and open-minded way to broaden this research field in a wider range of energies with high-sensitivity detectors [1].
In this panorama is inserted...
Hard probes as heavy quarks (charm and beauty) and jets are valuable tools for investigating the properties of the quark-gluon plasma (QGP) formed in ultra-relativistic heavy-ion collisions. In particular, measurements of the nuclear modification factor $R_{\rm AA}$ of these probes allow us to characterise the in-medium energy loss of heavy quarks, light quarks and gluons while traversing the...
Traditionally, scalar ϕ4 theory in four dimensions is thought to be quantum trivial in the continuum. This tradition is apparently well grounded both in physics arguments and mathematical proofs. Digging into the proofs one finds that they do not actually cover all physically meaningful situations, in particular the case of multi-component fields and non-polynomial action. In this work, I...
We present updated predictions of $R(D^{(*)})$ using a modified power-counting within the heavy quark effective theory that results in a highly constrained set of second-order power corrections in the heavy quark expansion, compared to the nominal expansion. We analyze new experimental data to determine all $B \to D^{(*)}$ form factors within and beyond the Standard Model at...
The new CMS MIP Timing Detector (MTD) will provide precision timing information for charged particles, with hermetic coverage up to a pseudo-rapidity of |η|=3. This upgrade will mitigate the effects of pile-up expected at the High-Luminosity LHC, while bringing new and unique capabilities to the CMS detector. The endcap regions of CMS will be instrumented with two disks of silicon devices with...
Most of the current experimental searches for charged Higgs bosons at the Large Hadron Collider (LHC) concentrate upon the $tb$ and $\tau\nu$ decay channels. In this study, we analyze the feasibility of the bosonic decay channel $W^{\pm (*)} h$ instead, with the charged gauge boson being either on-shell or off-shell and $h$ being a neutral light Higgs boson. Focusing on the Two-Higgs Doublet...
Jets are excellent probes for studying the deconfined matter formed in heavy ion collisions. This talk presents the new observables to study how jets interact with the QGP. First, we introduce a new infrared and collinear safe measurement of the jet energy flow within jets reconstructed with different resolution parameters $R$. Changing the jet $R$ varies the relative contribution of competing...
The anomalous (odd intrinsic parity) Lagrangian in mesonic Chiral Perturbation Theory is determined to next-to-next-to-leading order ($p^8$) thereby completing the order $p^8$ Lagrangian [1810.06834]. The number of independent operators and the operator basis will be discussed for a general number $N_f$ of light quark flavours as well as for the physical cases $N_f=2,3$. The explicit...
Semileptonic $B$-meson decays allow for determining the magnitudes of the CKM matrix parameters $|V_{cb}|$ and $|V_{ub}|$, two fundamental parameters of the SM flavor sector. Belle II analyses use both exclusive decays such as $B \to D^*\ell \nu$ and $B \to \pi \ell \nu$, or inclusive $X_c \ell \nu$ or $X_u \ell \nu$ final states restricted in phase space. The low-background collision...
Duration: 15'+5'
With the help of the pole approximation, observables with polarised intermediate resonances can be calculated. Gauge-boson-pair production represents a particularly interesting class of processes to study polarisation. The definition of polarised signals at amplitudue level has enabled successful phenomenological studies of leptonically decaying vector bosons. The natural...
The new version of SusHi is introduced. It features a unified input for SM and BSM parameters for higher-order total cross sections for Higgs production in gluon fusion, heavy-quark annihilation, as well as Higgs-Strahlung. Like previous versions of SusHi, it provides links to codes like 2HDMC and FeynHiggs, but can also process standard SLHA output of spectrum generators like SoftSusy and SPheno.
Supernova (SN) explosions provide a perfect environment to produce and therefore test hypothetical particles. SN1987a gave a possibility to set a number of constraints on FIPs parameters using the energy-loss argument and further development of neutrino detectors extends those possibilities. I will discuss, how SN-produced FIPs may create detectable signatures that can significantly improve...
For the High Luminosity era of the LHC, the accelerator will undergo a major upgrade to significantly increase the deliverable luminosity with respect to the current one. To withstand the harsh experimental conditions in terms of pileup and radiation at the HL-LHC and maintain the current excellent performance, substantial upgrades of the experiments are ongoing. In particular, the CMS upgrade...
In a class of theories, dark matter is explained by postulating the existence of a 'dark sector',
which interacts gravitationally with ordinary matter. If this dark sector contains a U(1) symmetry,
and a corresponding 'dark' photon ($A_{D}$) , it is natural to expect that this particle with kineticly mix
with the ordinary photon, and hence become a 'portal' through which the dark sector can...
Measurements of jet production in proton-proton collisions at the LHC are crucial for precise tests of QCD, improving the understanding of the proton structure and are important tools for searches for physics beyond the standard model. We present the most recent set of jet measurements performed using CMS data, from which measurements of the the strong coupling constant and PDF constraints are...
The AdS/CFT correspondence is a powerful tool for studying quantum gravity and strongly coupled quantum field theories. One of its simplest predictions is that the on-shell action of type IIB supergravity on $AdS_5 \times S^5$ is a non-zero number fixed by the boundary data, despite being zero in the standard formulation of supergravity. This apparent paradox was recently resolved by Kurlyand...
ATLAS innermost detector layer will undergo a broad range of upgrades for the HL-LHC phase. To be able to cope with the new detector design and a large set of modules to be integrated on the ITk, a demonstrator-based project at SR1 facility in CERN is conducted, to test and integrate a large number of Pixel modules equipped with RD53a electronics.
To mimic the ITk detector, a demonstrator...
Supersymmetric models with radiatively-driven naturalness (RNS) enjoy low electroweak fine-tuning whilst respecting LHC search limits on gluinos and top squarks and allowing for $m_h\simeq 125$ GeV. While the heavier Higgs bosons $H,\ A$ may have TeV-scale masses, the SUSY conserving $\mu$ parameter must lie in the few hundred GeV range. Thus, in natural SUSY models there should occur large...
We have all heard the story; classical physics supposedly predicts that the intensity of emitted radiation from a blackbody diverges in the ultraviolet and that is why Planck introduced the quanta of light.
This story, however, is a myth fabricated long after the historical events. The ultraviolet catastrophe was not coined until 1911 and its origin dates back to 1905; five years after...
The LIGO-Virgo detections made so far have neglected the realistic astrophysical environment where the compact binaries live. Gravitational wave emission will be affected by the source surroundings and the environment imprints should be observable in a dephasing of the emitted signal with respect to the vacuum scenario.
We present a first investigation on environmental effects for the events...
$J/\psi-$pair production at the LHC is currently the best tool available to probe gluon transverse momentum distributions (TMDs) which are very poorly known today. Data from LHCb at low transverse momentum are already available and more are expected soon from CMS and LHCb. Such data in the collider mode will allow one to probe the evolution of the unpolarised-gluon TMDs and to measure, for the...
We report the measurement of the partial branching fraction of $B \to X_u \ell \bar \nu_\ell$ over $B \to X_c \ell \bar \nu_\ell$ using the complete Belle data set of 711 fb${}^{-1}$. We reconstruct collision events where one B meson is fully reconstructed in hadronic modes using the full-event-interpretation algorithm, developed for Belle II. This allows for the reconstruction of the hadronic...
Recently, a concept for a Hybrid Asymmetric Linear Higgs Factory (HALHF) has been proposed, where a center-of-mass energy of 250 GeV is reached by colliding a plasma-wakefield accelerated electron beam of 500 GeV with a conventionally accelerated positron beam of about 30 GeV. While clearly facing R&D challenges, this concept bears the potential to be significantly cheaper than any other...
The investigation of the trilinear self-coupling of the discovered Higgs boson is one of the main goals of particle physics in the near future.
We provide predictions for this coupling, expressed in terms of the coupling modifier $\kappa_\lambda$, incorporating one-loop corrections within arbitrary renormalizable QFTs.
The presented framework (implemented in the public code ${\tt anyH3}$)...
CMS searches for dark matter including those with dark portal interactions are presented. Various topologies and kinematic variables are explored. In this talk, we focus on the recent results obtained using the full Run-II dataset collected at the LHC.
We present a method to verify Mikheyev-Smirnov-Wolfenstein effect during the propagation of SN neutrinos from the SN core to the Earth. The non-MSW scenario to be distinguished from the MSW one is the
incoherent flavor transition probability for neutrino propagation in the vacuum. Our approach involves studying time evolution of neutrino event rates in liquid Argon, liquid scintillation and...
Semileptonic $b$-hadron decays proceed via charged-current interactions and provide powerful probes for testing the Standard Model and for searching for New Physics effects. The advantages of studying such decays include the large branching fractions and reliable calculations of the hadron matrix elements. In this contribution, LHCb measurements on CKM paramenters and test of new physics will...
The current catalog of gravitational waves (GWs) from binary black hole (BBH) mergers allows to conduct refined tests to probe the validity of the general relativity (GR) theory against alternative predictions. It has been proposed that black holes (BHs) may have exotic characteristics making them different from GR BH. Such exotic compact objects (ECOs) would radiate repeated GW pulses of...
The uncertainties affecting the integrated absolute luminosity recorded by the experimental detectors in pp collisions during LHC Run 2 lie in the 1-2% range. They typically fall into three categories: van-der-Meer (vdM) calibration biases, instrumental non-linearities that affect the transfer of the vdM calibration to the high-luminosity physics regime, and long-term stability of the...
FASER, the ForwArd Search ExpeRiment, is an LHC experiment located 480 m downstream of the ATLAS interaction point, along the beam collision axis. One main physics goal of FASER and its sub-detector FASERnu is to detect and study TeV-energy neutrinos, the most energetic neutrinos ever detected from a human-made source. FASER is taking data since the start of LHC Run 3 in July 2022. This talk...
In this talk, I will discuss the impact of one-loop QCD corrections[1] to the differential distributions of $J/\psi$ and $\Upsilon$ mesons produced in inclusive $\gamma \gamma$ collisions for the kinematical conditions of LEP and future high-energy $e^+e^-$ facilities. Firstly, I will focus on the pure QED processes $\gamma + \gamma \to Q\bar{Q}(^3S^{[1]}_1) +\gamma$, which only receive...
Monopoles are inevitable predictions of GUT theories. They are produced during phase transitions in the early universe, but also mechanisms like Schwinger effect in strong magnetic fields could give relevant contributions to the monopole number density. I will show that from the detection of intergalactic magnetic fields of primordial origin we can infer additional bounds on the magnetic...
The Forward Calorimeter (FoCal) in ALICE, which is planned to take data in Run 4, covers a pseudorapidity interval of 3.4 < $\eta$ < 5.8 for probing non-linear QCD dynamics in an unexplored kinematic region at the LHC. In its electromagnetic section, layers of high granularity Monolithic Si pixels are alternated to Si pads for sampling the longitudinal development of the electromagnetic...
We consider the next-to-leading order electroweak corrections to the Higgs boson pair production in gluon fusion. This requires the computation of two-loop four-point amplitudes with massive internal particles such as top quarks, Higgs and gauge bosons. We perform analytic calculations both in the high-energy and large top-quark mass limits. In particular, we show that our high energy...
The beam–beam interaction between the two circulating beams has been studied since the era of particle colliders started. This electromagnetic interaction occurs during collisions and can result in a significant bias on the measured luminosity. Numerical models have been developed to study the beam-beam induced bias on the Large Hadron Collider (LHC) luminosity measurements during van der Meer...
We calculate the total cross section and transverse momentum distributions for the production of the enigmatic $\chi_{c1}(3872)$ (or X(3872)) (see [1]) assuming different scenarios: $c \bar c$ state and $D^{0*} {\bar D}^0 + D^0 {\bar D}^{0*}$ molecule.
The derivative of the $c \bar c$ wave function needed in the first scenario is taken from a potential $c \bar c$ model calculations. Compared...
SND@LHC is a compact and stand-alone experiment to perform measurements with neutrinos produced at the LHC in a hitherto unexplored pseudo-rapidity region of 7.2 < 𝜂 < 8.6, complementary to all the other experiments at the LHC. The experiment is located 480 m downstream of IP1 in the unused TI18 tunnel. The detector is composed of a hybrid system based on a 800 kg target mass of tungsten...
Duration: 15'+5'
This paper presents a comprehensive study of currently available measurements of the mass of the W boson. The study uses results from the hadron colliders Tevatron and LHC, performed by the CDF, D0, ATLAS and LHCb experiments, and includes the combined result from LEP-2. As the measurements were performed at different moments in time, different assumptions for the modelling...
Star clusters are the dynamical formation channel for binary black holes (BBHs). In these dense systems, BBH mergers are driven by gravitational wave emission and binary-single encounters with other objects in the environment. The talk will focus on the gravitational wave (GW) signals generated by close encounters between a BBH and a third black hole, highlighting the various outcomes that can...
Gaining information about the shape of the Higgs potential is one of the main goals of particle physics for the coming years. The trilinear Higgs self-interactions can directly be probed via Higgs pair production, which at the LHC happens dominantly through gluon fusion. In models with extended Higgs sectors the trilinear self-coupling of the detected Higgs boson can largely deviate from the...
We consider an axion-like particle decaying invisibly at Belle II proposing a nearly background-free search in the $e^+e^-+\text{invisible}$ channel. This search leverages dedicated kinematic variables, whose behaviour and performance we test under a simplified, yet realistic, treatment of detector effects. We find that at the Belle II experiment the $e^+e^-+\text{invisible}$ channel has the...
We investigate the imprints of new long-range forces mediated by a new light scalar acting solely on dark matter. Dark fifth forces in general will modify the background evolution as well as the growth of density fluctuations. At the linear level, constraints are derived from CMB together with a full-shape analysis of the power spectrum as measured by BOSS. At the non-linear level, the...
We present a new measurement of the lepton-flavor-universality ratios $R(D^{(*)})$ utilizing the entire Belle data set, which corresponds to an integrated luminosity of 711 fb${}^{-1}$. The analysis employs hadronic tag-side reconstruction, leveraging the capabilities of the full-event-interpretation algorithm developed for Belle II. This results in a significant efficiency improvement of...
Recent CMS results on production of open heavy flavor hadrons and quarkonia in pp collisions are discussed. The measurements are performed with data collected in pp collisions at sqrt(s)=13 TeV between 2016 and 2018.
A new era of hadron collisions will start around 2029 with the High-Luminosity LHC which will allow to collect ten times more data than what has been collected during 10 years of operation at LHC. This will be achieved by higher instantaneous luminosity at the price of a higher number of collisions per bunch crossing. In order to withstand the high expected radiation doses and the harsher data...
Measurements of Numu Charged Current Pion Production on different nuclei in the delta(1232) resonance region are an important interaction process for accelerator-based neutrino oscillation experiments. Here we present new high statistics differential cross section measurements of pi plus and pi zero production on scintillator, carbon, water, iron, and lead targets recorded by the MINERvA...
In the Standard Model, the ground state of the Higgs field is not found at zero but instead corresponds to one of the degenerate solutions minimising the Higgs potential. In turn, this spontaneous electroweak symmetry breaking provides a mechanism for the mass generation of nearly all fundamental particles. The Standard Model makes a definite prediction for the Higgs boson self-coupling and...
Duration: 15'+5'
Measurements of neutral current Drell-Yan production at large invariant dilepton masses can be used to test the energy scale dependence (running) of the electroweak mixing angle.
In this work, we make use of a novel implementation of the full next-to-leading order electroweak radiative corrections to the Drell-Yan process using the $\overline{\mathrm{MS}}$ renormalization...
Q-balls are non-topological solitons that coherently rotate in field space. We show that these coherent rotations can induce superradiance for scattering waves, thanks to the fact that the scattering involves two coupled modes. Despite the conservation of the particle number in the scattering, the mismatch between the frequencies of the two modes allows for the enhancement of the energy and...
Belle has unique reach for a broad class of models that postulate the existence of dark matter particles with MeV—GeV masses. This talk presents recent world-leading physics results from Belle II searches for dark $Z’$ decays as well as long-lived (pseudo) scalars in $B$ decays.
Gravitational-wave (GW) observations provide unique information about compact objects and, as detectors sensitivity increases, new astrophysical populations could emerge. Close hyperbolic encounters are one such example: black holes and neutron stars are expected to have unbound orbits in dense clusters, that manifest as GW burst signals in the frequency band of current detectors.
In this...
In the Standard Model, the introduction of a singlet complex scalar field that acquires vacuum expectation value may give rise to a cosmologically stable pseudo-Nambu-Goldstone boson (pNGB); a good dark matter (DM) candidate with novel features at the phenomenological level, such as the reduction of the direct detection signal. This work extends this scenario by including a second cosmological...
The Two-Higgs-Doublet-Standard Model-Axion-Seesaw-Higgs-Portal inflation (2hdSMASH) model consisting of Two Higgs doublets, a Standard Model (SM) singlet complex scalar and three SM singlet right-handed neutrinos can embed axion dark matter, neutrino masses and address inflation. We report on an investigation of the inflationary aspects of 2hdSMASH and its subsequent impact on low energy...
We derive limits on the intrinsic charm (IC) content of the proton,
considering various theoretical models for IC, using as a basis
the results on the upper limit of prompt neutrino fluxes from the IceCube
collaboration. We work under the hypothesis that both the standard
heavy-flavour production and decay mechanism, mainly driven by gluon-gluon partonic interactions in pQCD, and the one...
Precise knowledge of how neutrinos interact with matter is essential for measuring neutrino oscillations in long-baseline experiments. At the T2K experiment, the near detector complex measures neutrino interactions to constrain cross section models for oscillation studies and characterises the beam flux. In addition, the near detector complex provides a separate platform for performing...
The Mu2e experiment at Fermilab will search for the charged-lepton flavour violating conversion of negative muons into electrons in the coulomb field of an Al nucleus, planning to reach a single event sensitivity of about 3x10^{−17}, four orders of magnitude beyond the current best limit.
The conversion electron has a clear monoenergetic signature at 104.967 MeV, slightly below the muon...
Studying heavy-flavor mesons and baryons in hadronic collisions provides unique access to the properties of heavy-quark hadronisation in the presence of large partonic densities, where new mechanisms of hadron formation beyond in-vacuum fragmentation can emerge. It also tests calculations of perturbative QCD and explores the role of cold nuclear matter effects. Examining heavy-flavor...
Multi-TeV muon collisions are one of the most promising means to perform Standard Model high precision physics measurements and to search for new physics. The design of the interaction region and therefore of the Machine-Detector Interface, depends on the center of mass energy, therefore dedicated studies and optimizations are needed. In order to achieve the desired luminosity, high beam...
Progress in high-energy physics has been closely tied to the development of high-performance electromagnetic calorimeters. Recent experiments have demonstrated the possibility to significantly accelerate the electromagnetic shower development inside the scintillating crystals, typically used to build homogeneous calorimeters, when the incident beam is aligned with a crystallographic axis. In...
Experimental information on the trilinear Higgs boson self-coupling $\kappa_3$ and the quartic self-coupling $\kappa_4$ will be crucial for gaining insight into the shape of the Higgs potential and the nature of the electroweak phase transition. While Higgs pair production processes provide access to $\kappa_3$, triple Higgs production processes, despite their small cross sections, will...
The IceCube Neutrino Observatory is a cubic-kilometer ice Cherenkov detector located at the geographic South Pole. Thousands of photomultipliers embedded in the deep glacial ice have been used to successfully detect and reconstruct astrophysical neutrino interactions over the last decade. This rich data set has provided evidence for several astrophysical neutrino sources, demonstrating that...
The costs of operating big science facilities, for example accelerators, are very large, and depend critically on the price of primarily electricity, but also of water and other utilities. This means that facilities must be energy and resource efficient. Facilities should at the same time also be environmentally sustainable. Finally, in these times with very high energy prices, all efforts...
The exclusive photoproduction reactions γp→J/ψ(1S)p and γp→ψ(2S)p have been studied at an ep centre-of-mass energy of 318 GeV with the ZEUS detector at HERA using an integrated luminosity of 373 pb−1. The measurement has been made in the kinematic range 30 < W < 180 GeV, Q2 <1 GeV2, |t| <1 GeV2, where W is the photon--proton centre-of-mass energy, Q2 is the photon virtuality and t is the...
In several models of beyond Standard Model physics discrete symmetries play an important role. For instance, in order to avoid flavor changing neutral currents, a discrete Z2 symmetry is imposed on Two-Higgs-Doublet-Models (2HDM). This can lead to the formation of domain walls as the Z2 symmetry gets spontaneously broken during electroweak symmetry breaking in the early universe.
Due to...
Duration" 15'+5'
We present results from the global electroweak fit to precision measurements of the Standard Model (SM). The fit uses the latest experimental results as well as up-to-date theoretical calculations for observables on the Z pole and the W boson mass, yielding precise SM predictions for the effective weak mixing angle and the masses of the W and Higgs bosons, as well as the top...
Long-baseline (LBL) neutrino oscillation experiments search for Charge-Parity (CP) violation in the leptonic sector by precisely measuring the $\nu_\mu\to\nu_e$ and $\overline{\nu}_\mu\to\overline{\nu}_e$ appearance probabilities.
One of the dominant systematic uncertainties on the measurements of CP violation, comes from our modeling of the $\nu_e/\overline{\nu}_e$ cross-section ratio, which...
As members of the Virgo Collaboration – co-authoring observational results together with the LIGO Scientific Collaboration and the KAGRA Collaboration – we became aware of biased citation practices that exclude Virgo (and KAGRA) from achievements that collectively belong to the wider LIGO/Virgo/KAGRA Collaboration. Here we frame these practices in the context of Merton’s “Matthew effect”...
Weak gravitational lensing - small distortions of photon paths due to the large-scale structure of the Universe - is an emerging cosmological probe, also known as "cosmic shear". I will present recent results of today's main cosmic shear surveys, with a focus on the Kilo-Degree Survey (KiDS) in which I take part. I will in particular discuss the current status of the so-called "$S_8$ tension"....
The DEAP-3600 detector is a single-phase direct-detection Dark Matter (DM) experiment located 2 km underground at SNOLAB in Sudbury, Canada. The detector consists of 3279 kg of LAr contained in a spherical acrylic vessel. It was specifically designed to search for direct detection of dark matter candidates known as Weakly-Interacting Massive Particles (WIMPs). Radioisotope surface activity is...
The physics program of the Higgs factory will focus on measurements of the 125 GeV Higgs boson, with the Higgs-strahlung process being the dominant production channel at 250 GeV. However, production of extra light scalars is still not excluded by the existing experimental data, provided their coupling to the gauge bosons is sufficiently suppressed. Fermion couplings of such a scalar could also...
A Muon Collider is being proposed as a next generation facility. This collider would have unique advantages, since clean events as in electron-positron colliders are possible, and high collisions energy as in hadron colliders could be reached due to negligible beam radiation losses. The beam-induced background, produced by the muon decays in the beams and subsequent interactions, reaches the...
In this study, we investigate the constraints imposed on the Doublet Left-Right Symmetric Model (DLRSM) by the latest experimental data on the Higgs boson. While most previous studies have assumed small values for the ratios $r=\kappa_2/\kappa_1$ and $w=v_L/\kappa_1$, we consider the most general scalar potential and explore the constraints on $r$ and $w$. Through our analysis, we calculate...
Engaging young children in physics research is particularly challenging but offers unique educational potential. Outreach and engagement at an early age has been demonstrated to be key to increasing awareness of physics and to increasing diversity in the field in later years. We present a variety of activities and resources developed by the ATLAS Collaboration targeting this demographic,...
Darkside-20k is a next-generation dual-phase Liquid Argon Time Projection Chamber (LAr TPC), currently under construction at the Gran Sasso National Laboratory (LNGS) in Italy. The 20t fiducial liquid Argon mass will probe WIMP-nucleon interactions, with sensitivity to cross sections equal to $10^{-48}$ cm$^2$ for a WIMP mass of 0.1 TeV/𝑐$^2$ considering the exposure goal of 200 tonne-years....
We revisit the framework of axion-like inflation, considering a warm inflation scenario in which the inflaton couples to the topological charge density of non-Abelian gauge bosons whose self-interactions result in a rapidly thermalizing heat bath. Including both dispersive (mass) and absorptive (friction) effects, we find that the system remains in a weak regime of warm inflation (thermal...
LhARA, the ‘Laser-hybrid Accelerator for Radiobiological Applications’, will be a novel, uniquely flexible, facility dedicated to the study of radiobiology. LhARA will use a high-power pulsed laser to generate a short burst of protons or light ions. These will be captured using strong-focusing electron-plasma (Gabor) lenses. Acceleration using a fixed-field alternating-gradient accelerator...
The CMS collaboration has recently reported the final Run 2 results of the low-mass Higgs-boson search in the di-photon channel. The new results show an excess of events at a mass of about 95 GeV with a local significance of $2.9\sigma$, confirming a previously reported excess at about the same mass and similar significance based on the first-year Run 2 plus Run 1 data. In this work, we...
Duration: 15'+5'
The ATLAS experiment has performed extensive searches for rare Standard Model processes involving top quarks. In this contribution two recent highlights of this programme are presented. The top-quark pair production in association with a W boson is a difficult process to calculate and model and is one of the leading sources of same-sign and multi-lepton events. To improve our...
The first observation of hypertriton and antihypertriton at the LHCb experiment is reported. The used dataset consists of pp collisions at √s = 13 TeV, collected between 2016 and 2018, and corresponds to an integrated luminosity of L = 5.5/fb. The hypertriton candidates are reconstructed via the 2-body decay into helium-3 and a charged pion. The corresponding helium nuclei are identified with...
The electromagnetic calorimeter (ECAL) of the CMS experiment at the CERN LHC, due to its excellent energy resolution, is crucial for many physics analyses, ranging from Higgs measurements to new physics searches involving very high mass resonances. A precise calibration of the detector and all its individual channels is essential to achieve the best possible resolution for electron and photon...
ProtoDUNE Single-Phase is a 700-ton liquid argon detector operated in the CERN Neutrino Platform from 2018 to 2020. It is part of the Deep Underground Neutrino Experiment (DUNE), a long-baseline neutrino oscillation experiment with a 40 kT liquid argon far detector to be built at the Sanford Underground Research Facility and a near detector, with both argon and non-argon detector technologies,...
Interest of youth in STEM, and especially physics and engineering studies, is declining,even though new generation of specialists is needed to ensure the continuation of cutting-edge research, primordial for innovation, economic progress and sustainable development. New
pathways are to be found to inspire more young talents to become physicists and STEM specialists. Putting these branches to...
The construction of an electron-positron collider "Higgs factory" has been stalled for a decade,not because of feasibility but because of the cost of conventional radio-frequency (RF) acceleration.
Plasma-wakefield acceleration promises to alleviate this problem via significant cost reduction based on its orders-of-magnitude higher accelerating gradients. However, plasma-based acceleration...
The idea of searching for gravitational waves using cavities in strong magnetic fields has recently received significant attention. In particular, cavities with rather small volumes that are currently used to search for axion-like particles are discussed in this context. We propose here a novel experimental scheme enabling the search for gravitational waves with MHz frequencies and above,...
Though the Standard Model (SM) provides a very elegant description of interactions among fundamental particles, there are ample evidences to believe that there exists physics beyond the Standard Model. In particular extending the scalar sector has enough motivation from vacuum stability, electroweak phase transition and various other sectors. Among different such extensions, two Higgs doublet...
Neutrinos are unique tools to probe new physics scenarios such as non-standard interactions (NSIs) of neutrinos with matter. The coupling of neutrinos to a scalar field gives rise to a new interaction known as Scalar NSI. Unlike the vector NSI case, which contributes to the usual matter potential, the scalar NSI appears as a correction to the neutrino mass term. In this work, we perform a...
The nature of dark matter is still a mystery in physics and the detection of particle dark matter has eluded experiments for decades. DARWIN is a next-generation liquid-xenon-based experiment that plans to reach a dark matter sensitivity limited by the cosmic neutrino background. With a proposed active target of 40 t of liquid xenon, ultra-low radioactive background, and keV-level threshold,...
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 SUSY...
Beam-driven plasma-wakefield acceleration (PWFA) is a promising technology for future accelerator facilities, where a high electric field gradient could shrink the size, reduce the cost or/and provide highest beam energies. Successful experimental results in recent decades have demonstrated the feasibility of high-gradient acceleration in plasma. However, to meet the demands of current...
The $p_T$-integrated cross section of inclusive hadro and photo-production of heavy quarkonia when computed up to NLO in Collinear Factorisation(CF) shows a perturbative instability at high hadronic or photon-hadron collision energies - the cross section could turn negative for reasonable factorisation/renormalisation scale-choices. We solve this problem by resummation of the subset of LLA...
As gravitational waves (GW) probe the strong field regime of gravity, they are an important tool for testing gravitational models. This requires an accurate description of the gravitational waveforms in modified gravity theories. In this work we focus on scalar Gauss Bonnet gravity (sGB), a promising extension of General Relativity (GR), to include finite size effects in the modelling of the...
With several thousand members from more than 200 institutes and over 50 countries, the CMS Collaboration is inherently a diverse and unique scientific environment. The CMS Diversity & Inclusion Office aims to foster further diversity among our collaboration, create an inclusive environment, and ensure equitable access to opportunities, resources, and recognition for all members. The goal,...
There is a compelling physics case for a large, xenon-based underground detector devoted to dark matter and other rare-event searches. A two-phase time projection chamber as inner detector allows for a good energy resolution, a three-dimensional position determination of the interaction site and particle discrimination. To study challenges related to the construction and operation of a...
15'+5'
The top quark is hypothesized in many BSM models to have enhanced, non-standard or rare interactions with other SM or BSM particles. This presentation covers the latest CMS direct results in this regard, including the tests of lepton flavor violations and baryon number violations, including FCNC searches.
The DsTau experiment at CERN-SPS has been proposed to measure an inclusive differential cross-section of a Ds production with a consecutive decay to tau lepton in p-A interactions. A precise measurement of the tau neutrino cross section would enable a search for new physics effects such as testing the Lepton Universality (LU) of Standard Model in neutrino interactions. The detector is...
Future e$^+$e$^-$ colliders, thanks to their clean environment and triggerless operation, offer a unique opportunity to search for long-lived particles (LLPs) at sub-TeV energies. Considered in this contribution are promissing prospects for LLP searches offered by the International Large Detector (ILD), with a Time Projection Chamber (TPC) as the core of its tracking systems, providing almost...
I briefly review the Benchmark Planes in the Two-Real-Singlet Model (TRSM), a model that enhances the Standard Model (SM) scalar sector by two real singlets that obey a Z2 x Z2' symmetry. In this model, all fields acquire a vacuum expectation value, such that the model contains in total 3 CP-even neutral scalars that can interact with each other. All interactions with SM-like particles are...
A key ambition expressed in the European Strategy for Particle Physics has been that “the energy efficiency of present and future accelerators […] is and should remain an area requiring constant attention”. Accordingly, “a detailed plan for the [ …] saving and re-use of energy should be part of the approval process for any major project”. The Energy Recovery Linac (ERL) developments directly...
The latest CMS results on spectroscopy and properties of beauty mesons and baryons are presented. The results are obtained with the data collected by the CMS experiment in proton-proton collisions at sqrt(s)=13 TeV.
The ATLAS Collaboration consists of more than 5000 members, from over 100 different countries. Regional, age and gender demographics of the collaboration are presented, including the time evolution over the lifetime of the experiment. In particular, the relative fraction of women is discussed, including their share of contributions, recognition and positions of responsibility, including...
The MUonE experiment proposes a novel approach to determine the leading hadronic contribution to the muon g-2, from a precise measurement of the differential cross section of the $\mu e$ elastic scattering, achievable by using the CERN SPS muon beam onto atomic electrons of a light target.
The detector layout is modular, consisting of an array of identical tracking stations, each one made of...
Various extensions of the Standard Model predict the existence of additional Higgs bosons. If these additional Higgs bosons are sufficiently heavy, an important search channel is the di-top final state. In this channel interference contributions between the signal and the corresponding QCD background process are expected to be important. If more than one heavy Higgs boson is present, besides...
Models of freeze-in Dark Matter (DM) have emerged as a compelling explanation for the absence of a signal in direct detection experiments. In these models, DM is generated through the decay of a feebly coupled parent particle. If the parent carries a gauged charge, it can be potentially detected in long-lived particle searches (LLPs). Moreover, in this framework, DM production predominantly...
Despite decades of experimental efforts, the direct detection of a dark matter (DM) signal has remained elusive. Leading experiments typically have sensitivity to DM candidates in the mass range from 10 GeV to O(1 TeV), therefore a sensitive detection method to probe the sub-GeV mass range is highly motivated. The TESSERACT collaboration aims to use two fully defined sensor technologies (SPICE...
Muon colliders offer enormous potential for the exploration of the particle physics frontier, representing the unique possibility of combining the high centre-of-mass energy and luminosity of hadron colliders with very precise measurements of lepton machines. They provide an unprecedented physics reach from Standard Model (SM) processes to new physics beyond the SM. The contribution presented...
A rich cross-section and "beyond the Standard Model" (BSM) search programme will be served by the intense $\nu_e$ and $\nu_\mu$ beams that will be provided by the neutrinos from stored muons (nuSTORM) facility. Exceptional precision in cross section measurement and exquisite sensitivity in BSM searches are afforded at nuSTORM by the precise knowledge of the flavour composition and energy...
The B->DDX and other related final states provides a bountiful arena for performing spectroscopy studies. This talk covers the latest results in this area from amplitude analyses and direct searches.
In this presentation I plan to discuss potential offered by Energy-Recovery Linacs (ERLs) and particle recycling for boosting luminosity in high-energy electron-positions and lepton-hadron colliders. I will start from presenting several proposed ERL-based colliders and compare them with more traditional, but better developed concept of FCCee, ILC and CLIC. ERL-based colliders have promise not...
Searches for dark matter produced via scalar resonances in final states consisting of Standard Model (SM) particles and missing transverse momentum are of high relevance at the LHC. Motivated by dark-matter portal models, most existing searches are optimized for unbalanced decay topologies for which the missing momentum recoils against the visible SM particles. In this work, we show that...
Exotic beyond the Standard Model signatures, such as long-lived particles or high-mass resonances, are prime examples of the physics potential of a high-energy muon collider. These experimental signatures impose significant constraints on the detector design and requirements on the event reconstruction techniques employed to analyse the data.
For example: dedicated track reconstruction...
The DUNE experiment, currently under construction in the US, has a broad physics program that spans from oscillation physics at the GeV scale to the observation of solar neutrinos in few-MeV events. This program leverages the unprecedented resolution and imaging capability of the liquid argon TPC. LArTPCs are dense, fully-active detectors, that allow for a 3D real-time reconstruction of the...
Monitored neutrino beams represent a powerful and cost effective tool to suppress cross section related systematics for the full exploitation of data collected in long baseline oscillation projects like DUNE and Hyper-Kamiokande. In the last years the NP06/ENUBET project has demonstrated that the systematic uncertainties on the neutrino flux can be suppressed to 1% in an accelerator based...
15'+5'
Duration: 15'+5'
Effective Field Theories (EFTs) provide a framework for capturing the effects of yet unseen heavy degrees of freedom in a model-independent manner. However, constructing a complete and minimal set of operators, especially at higher mass dimensions, is challenging.
In this talk, we present $\texttt{AutoEFT}$, an implementation of an algorithm that systematically handles...
The quark model predicts exotic hadrons beyond the conventional quark-antiquark mesons and three quark baryons. Exotic candidates have since been observed in the early 2000's. Since then several exotic states have been discovered. LHCb has reported on tetraquark candidates such as the X(3872), the discovery of pentaquark resonances in 2015, and the first double charmed tetraquark. Many...
Quantum entanglement is one of the fundamental correlations between particles that has not yet been confirmed with high-energy photons. Quantum electrodynamics (QED) predicts that annihilation photons produced by the decay of the singlet state of positronium (Ps) atoms are entangled in their polarization [1]. Since these photons have an energy of 511 keV, there is no polarizer to measure the...
Higgs physics with ILC
speaker TBA
Technologically mature accelerator and detector design and well understood physics program makes ILC is a realistic option for realization of a future Higgs factory. Energy staged data collection, employment of beam polarization and capability to reach a TeV center-of-mass energy, enable unique sensitivity to New Physic's deviations from the Standard...
This talk presents the latest results of the reactor antineutrino flux and spectrum measurement at Daya Bay. The antineutrinos were generated by six 2.9 GWth nuclear reactors and detected by eight antineutrino detectors deployed in two near (560 m and 600 m flux-weighted baselines) and one far (1640 m flux-weighted baseline) underground experimental halls. From December 2011 to December 2020,...
The Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) features a sophisticated two-level triggering system composed of the Level 1 (L1), instrumented by custom-design hardware boards, and the High-Level Trigger (HLT), a software based trigger based on the complete event information and full detector resolution. The CMS L1 Trigger relies on separate calorimeter and muon...
The rare $B \to K^{(*)} \bar{\ell} \ell$ decays exhibit a long-standing tension with Standard Model (SM) predictions, which can be attributed to a lepton-universal short-distance $b \to s \bar{\ell} \ell$ interaction. We present two novel methods to disentangle this effect from long-distance dynamics: one based on the determination of the inclusive $b \to s \bar{\ell} \ell$ rate at high...
The HIBEAM/NNBAR program at the ESS will perform a high-sensitivity search for neutron oscillations with a potential to shed light on physics beyond the Standard Model. This program comprises two distinct phases: HIBEAM and NNBAR. HIBEAM will focus on the search for neutron-sterile neutron ($n$ - $n'$) oscillations, offering an opportunity to explore the physics of the dark sector, while the...
The Migdal in Galactic Dark mAtter expLoration (MIGDAL) experiment aims to make the first direct and unambiguous observation of the Migdal effect from fast neutron scattering using intense DT and DD generators, allowing the effect to be investigated over a wide range of nuclear recoil energies.
The experiment uses an Optical Time Projection Chamber equipped with a stack of two glass-GEMs...
The Higgs mechanism is a central part of the Standard Model which has not yet been fully established experimentally without the measurement of the Higgs self-coupling. Future linear $e^+e^-$ colliders are able to access center-of-mass energies of 500 GeV and beyond and can therefore probe the Higgs self-coupling directly through the measurement of double Higgs production. A new analysis of the...
Duration: 15'+5'
The top quark sector provides valuable constraints on SMEFT operators. This talk will focus on top quark measurements directly targeting constraints on EFT, as well as interpretations of differential or inclusive measurements in the EFT framework.
The KArlsruhe TRItium Neutrino (KATRIN) experiment is designed to determine the mass of the electron antineutrino by kinematic measurements of the tritium beta-decay with a target sensitivity of 0.2 eV$/c^2$ (90\% C.L.). In 2022, KATRIN reported the most stringent limit on the neutrino mass with $m_\nu < 0.8$ eV$/c^2$ (90$\%$ C.L) based on data acquired during the first two science runs of...
The Circular Electron Positron Collider (CEPC) was proposed by Chinese scientists in Sept. 2012, shortly after the discovery of the Higgs boson at LHC in July 2012. CEPC would enable the precision study of the Higgs boson and facilitate the search for new physics beyond the standard model. The accelerator design and the technology R&D of CEPC has been evolving since the launch of the project...
In the high luminosity phase of the LHC (HL-LHC) the collider will operate at an instantaneous luminosity of 1.5x10$^{34}$/cm/s. This poses stringent requirements on the capabilities of subdetectors due to the increased particle multiplicity and hit occupancy. The Upgrade II LHCb RICH (Ring-imaging Cherenkov) subsystem, in particular, will require improvements in spatial and time resolution to...
The proposed LUXE experiment (LASER Und XFEL Experiment) at DESY, Hamburg, using the electron beam from the European XFEL, aims to probe QED in the non-perturbative regime created in collisions between high-intensity laser pulses and high-energy electron or photon beams. This setup also provides a unique opportunity to probe physics beyond the standard model. In this talk we show that by...
The spectroscopy of charmonium-like states together with the spectroscopy of charmed and strange baryons is discussed. It is a good testing tool for the theories of strong interactions, including: QCD in both the perturbative and non-perturbative regimes, LQCD, potential models and phenomenological models [1, 2, 3]. An understanding of the baryon spectrum is one of the primary goals of...
e study possible CP-violation effect of the Higgs to Z boson coupling
at the future $e^+e^−$ collider. We find that the azimuthal angular distribution of the muon, produced by $e^+e^− \rightarrow HZ → H\mu^−\mu^+$, can be sensitive to such a CP-violation effect when we apply initial transversely polarized beams. Based on this angular
distribution, we construct a CP sensitive asymmetry, and...
Rare B-hadron decays mediated by b-> sll transitions provide a sensitive test of Lepton Flavour Universality (LFU), a symmetry of the Standard Model by which the coupling of the electroweak gauge bosons to leptons is flavour universal. Extensions of the SM do not necessarily preserve this symmetry and may give sizable contributions to these processes. Precise measurements of LFU ratios are,...
Duration: 15'+5'
The Standard Model effective field theory (SMEFT) provides a general framework to describe the Beyond standard model physics expected to be valid upto certain higher energy scale, say $\Lambda$. It is quite demanding and challenging too, to explore the signature of this kind of generalised theory. In order to explore it, we concentrate on the modifications of top quark...
Research in non-perturbative QED in strong-field backgrounds has gained interest in recent years, due to advances in high-intensity laser technologies that make extreme fields accessible in the laboratory. One key signature of strong-field QED is non-linear Compton scattering in collisions between a relativistic electron beam and a high-intensity laser pulse. In the vicinity of strong fields,...
The MicroBooNE experiment utilizes an 85-ton active volume liquid argon time projection chamber (LArTPC) neutrino detector. It can distinguish between photons and electron electromagnetic showers and can select charged current electron neutrino and muon neutrino events with exceptional performance. In this talk, we will presentresults on MicroBooNE's investigation of the MiniBooNE Low Energy...
The viable dark matter (DM) candidate mass range spans 90 orders of magnitude. The natural scenario where DM originates from thermal contact with familiar matter in the early Universe dramatically restricts this window to ~MeV to ~100 TeV. Considerable experimental efforts have sought Weakly Interacting Massive Particles in the upper end of this range (few GeV to several TeV), while the region...
Collisions of small systems show signatures suggestive of collective flow associated with QGP formation in heavy-ion collisions. Jet quenching is also a consequence of QGP formation, but no significant evidence of it in small systems has been found to date. Measuring or constraining the magnitude of jet quenching in small systems is essential to determine the limits of QGP formation. The ALICE...
Although the studies of tensor structure of the Higgs boson interactions with vector bosons and fermions at CMS and ATLAS experiments have established that the JPC quantum numbers of the Higgs boson should be 0++, small CP violation in the Higgs sector (i.e. less than 10% contribution of the CP-odd state) cannot be excluded with the current experimental precision. We review possibility to...
The goal of a next-generation e+e- collider is to carry out precision measurements to percent level of the Higgs boson properties that are not accessible at the LHC and HL-LHC. In this talk we will present the study of a new concept for a high gradient, high power accelerator with beam characteristics suitable to study the Higgs boson, the Cool Copper Collider (C3), with the goal of...
SiPMs are the baseline photodetector technology for the dual-radiator Ring-Imaging Cherenkov (dRICH) detector of the EPIC experiment at the future Electron-Ion Collider (EIC). SiPMs offer significant advantages being cheap devices, highly efficient and insensitive to the high magnetic field (~ 1.5 T) at the expected location of the sensors in the experiment. However, they are not radiation...
The elusive Dark Matter (DM), proposed due to its gravitational interaction with ordinary matter, supposedly makes up ∼ 25% of our universe. Various models aim to explain the origin and properties of dark matter, many of these proposing beyond standard model particles to make up most of the DM in our universe. The ALPS II (Any Light Particle Search II) light-shining-through-walls experiment...
There have been a lot of developments on identification of heavy objects decaying hadronically though large-size jets and tau leptons using machine learning techniques. These techniques have revolutionized searches for Supersymmetry at the LHC. In this talk, recent searches for Supersymmetry using heavy object tagging and tau leptons will be presented. The results are obtained from the...
In recent years, evidence of collective effects has been observed in small collision systems at the LHC; however, its precise origin remains unknown.
In this presentation, we will discuss new measurements of anisotropic flow observables (flow harmonic coefficients, flow vector correlation and decorrelation, nonlinear flow response) in pp and p--Pb collisions with ALICE. The highlights...
Recent CMS results on rare decays with FCNC transition b-->sll are reported. The analyses are based on proton-proton collision data collected in pp collisions at sqrt(s)=13 TeV.
he Any Light Particle Search II (ALPS II) is a Light Shining through a Wall experiment at DESY in Hamburg, which will hunt for axions and axion-like particles in the sub-meV mass range with an axion-photon-photon coupling $g_{\alpha \gamma \gamma} > 2 \times 10^{-11}\ \rm{GeV^{-1}}$, improving the sensitivity by a factor of $10^3$ compared to its predecessors. For this purpose, a high-power...
The International Linear Collider (ILC) and Compact Linear Collider (CLIC) are well-developed with mature designs as a next-generation high-energy electron-positron collider, for exploring the Higgs-boson, top-quark and beyond-Standard Model sectors. An overview and status of each collider project will be given, including the design, key technologies, accelerator systems, energy-staging...
Duration: 12'+3'
Recasting phenomenological Lagrangians in terms of SM effective field theory (SMEFT) provides a valuable means of connecting potential BSM physics at momenta well above the electroweak scale to experimental signatures at lower energies. In this work we jointly fit the Wilson coefficients of SMEFT operators as well as the PDFs using jet and top quark pair data, obtaining...
A high-performance muon detector system is crucial to realise physics goals of the CMS experiment at the LHC. The CMS muon spectrometer, consisting of different detector technologies across different pseudorapidity (η) regions, demonstrated efficient tracking and triggering of muons during Run1 and Run2 of the LHC operations. The legacy CMS muon detector system, consists of drift tube (DT)...
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 anticipated to begin operation later this year. SBND is characterized by superb imaging capabilities and will record over a...
SHADOWS (Search for Hidden And Dark Objects With the SPS) is a
proposed proton beam-dump experiment for the search of a large variety
of feeble-interacting particles (FIP) at the CERN SPS. It will exploit the
potential for searches and discoveries at the intensity frontier offered by
the upgrade of the ECN3 beam line.
SHADOWS, will be located off-axis, which allows the optimisation of...
The hadron collider phase of the Future Circular Collider (FCC-hh) is a proton-proton collider operating at a center-of-mass energy of 100 TeV. It is one of the most ambitious projects planned for the rest of this century and offers ample opportunities in the hunt for new physics, both through its direct detection reach as well as through indirect evidence from precision measurements....
The MAgnetized Disc And Mirror Axion eXperiment is designed to search for dark matter axions in the mass range around 100 µeV, which previously was inaccessible by other experiments. This mass range is favored by models in which the PQ symmetry is broken after inflation. The required sensitivity is reached in MADMAX by applying the dielectric haloscope approach, exploiting the axion to photon...
Decays of B mesons that proceed through radiative penguin amplitudes probe a large class of generic non-SM models for which Belle II has unique reach. We present recent results from an inclusive $b \to s \gamma$ analysis and a $B \to \rho \gamma$ analysis. In addition, we report results on $b \to s \ell^+ \ell^-$ decays of B mesons, which proceed through electroweak penguin amplitudes and...
Duration: 15'+5'
We present a global analysis of Beauty, Top, Z, and Drell-Yan measurements within the framework of the Standard Model effective field theory (SMEFT). We use the minimal flavor violation (MFV) assumption and perform a combined analysis of up to 14 Wilson coefficients. We demonstrate that the combination of measurements from different sectors yields stronger constraints on the...
Hidden sectors can help explain many important hints for new physics, but the large variety of viable models is a challenge for the model-independent interpretation of experimental light hidden particle searches. Standard techniques such as simplified models or effective field theories (EFTs) typically envision minimalist hidden sectors with only a single new particle, and it is not always...
The ICARUS collaboration has employed the 760-ton T600 detector in a successful three-year physics run at the underground LNGS laboratory, performing a sensitive search for LSND-like anomalous $\nu_e$ appearance in the CNGS beam, contributing to the constraints on the allowed neutrino oscillation parameters to a narrow region around 1 eV$^2$. After a significant overhaul at CERN, the T600...
Given the High Luminosity phase of the Large Hadron Collider (HL-LHC), which is expected to deliver an instantaneous luminosity 5 times higher with respect to the present value, the muon spectrometer of the CMS experiment will undergo specific upgrades targeting both the electronics and detectors to cope with the new challenging data-taking conditions and to improve the present tracking and...
The BREAD Collaboration is establishing a program of broadband searches for terahertz axion dark matter. Its hallmark is a cylindrical metal barrel converting axions to photons, focused by a parabolic reflector to low-noise photosensors. Practically, this novel dish antenna geometry enables enclosure inside standard cryostats and high-field solenoidal magnets. BREAD plans to open multiple...
Baryon asymmetry of the Universe (BAU) provides unambiguous evidence for need of New Physics (NP). In this context, a general two Higgs doublet model (g2HDM) without $Z_2$ symmetry is appealing because it can solve BAU via electroweak baryogenesis (EWBG), while the scenario can be tested in direct searches as well as in low energy precision measurements of flavor observables. We discuss...
Duration: 15'+5'
Top quarks and in general heavy quarks are likely messengers to new physics. The scrutiny of these particles properties must be completed by the measurement of electroweak qqbar production at high energies, in particular for the top. Projects as the International Linear Collider will offer an the extremely favorable and low-background environment of e+e- annihilation and high...
Particle detectors made of plastic scintillator with three dimensional granularity and sub-ns time resolution are capable of simultaneous particle tracking and calorimetry. However, large-scale detectors with fine granularity require great efforts on the manufacturing and assembly processing, which can be prohibitive, time consuming, expensive and hard to control with the desired precision....
Positron sources are challenging for all high-energy lepton colliders due to the high luminosity, stability and polarization requirements imposed by phyiscs. In this talk an overview will be given on the different concepts of positron sources. The focus will be set on the currently most mature designs as, for instance, the undulator-based positron source, foreseen for the ILC baseline design,...
We report the first search for the Sagittarius tidal stream of axion dark matter around 4.55 µeV using CAPP-12TB haloscope data acquired in March of 2022.
Our result excluded the Sagittarius tidal stream of Dine-Fischler-Srednicki-Zhitnitskii and Kim-Shifman-Vainshtein-Zakharov axion dark matter densities of ρa >~ 0.184 and >~ 0.025 GeV/cm3 , respectively, over a mass range from 4.51 to 4.59...
The idea that new physics could take the form of feebly interacting particles (FIPs) - particles with a mass below the electroweak scale, but which may have evaded detection due to their tiny couplings or very long lifetime - has gained a lot of attraction in the last decade, and numerous experiments have been proposed to search for such particles. It is important, and now very timely, to...
We present an updated and improved global fit analysis of current flavor and electroweak precision observables to derive bounds on unitarity deviations of the leptonic mixing matrix and on the mixing of heavy neutrinos with the active flavours, which is motivated by the lastest experimental updates on key observables such as $V_{ud}$, the Z invisible width and the W mass.
Multi-TeV center of mass energies muon collisions are an ideal environment for studying Higgs boson properties. At these energies the high production rates will allow precise measurements of its couplings to fermions and bosons. Moreover, in such collisions it will be possible to study the Higgs potential by measuring the double Higgs production cross section and determining the trilinear...
We analyze the implications of current $b \to s \ell \ell$ ($\ell=e, \, \mu$) measurements on several $B \to K^* \tau^+ \tau^-$ observables under the assumption that the possible new physics can have both universal as well as nonuniversal couplings to leptons. For these new physics solutions, we intend to identify observables with large deviations from the Standard Model (SM) predictions as...
Duration: 15'+5'
As the heaviest particle of the Standard 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. Thanks to the data from the Large Hadron Collider, these couplings are currently being studied with...
Fragmentation Functions (FF) are universal non-perturbative objects that model hadronization in some general kind of processes. They are mainly extracted from experimental data, hence constraining the parameters of the corresponding fits is crucial for achieving reliable results. As expected, the production of lighter hadrons is favoured w.r.t. heavy ones, thus we would like to exploit the...
Plastic scintillators are widely used in particle physics experiments. Additive manufacturing techniques allow the production of parts with free shapes and, depending on the application, direct integration with other detector components. This opens up new possibilities for the development of, for example, trigger and veto systems or 3D-segmented detectors like high-granularity calorimeters...
We present the design, status and first results of a detector to search for axions and axion-like particles in the galactic halo using laser interferometry. The detector is sensitive to the polarisation rotation of linearly polarised light induced by an axion field in the mass range from $10^{−16}$ $eV$ up to $10^{−8}$ $eV$, and is likely to significantly surpass the CAST limit. Currently, we...
To ensure high luminosity for high energy physics experiments at the International Linear Collider (ILC), a source of sufficient amounts of positrons is required. One approach for this is to produce positrons by generating electron-positron pairs from high energy photons impinging on a high-Z target material and capturing these particles with a magnetic focusing device. This beam-optics...
Cosmic Neutrinos, Direct Neutrino Mass Measurement, and Neutrinoless Double Beta Decay.
The accretion of dark matter around the black hole could lead to the formation of surrounding halo. Such a dark matter dressed black hole can leave characteristic imprints in the observations of gamma-ray and gravitational waves, which can be used to explore the nature of dark matter.
The main goal of the GERmanium Detector Array (GERDA) experiment at the Laboratori Nazionali del Gran Sasso (LNGS, Italy) is the search for the lepton-number-violating neutrinoless double-beta ($0\nu\beta\beta$) decay of 76Ge. The potential discovery of such phenomenon would have significant implications in cosmology and particle physics, unrevealing the Majorana nature of neutrinos. The main...
The presence of dark matter can explain several observations in the universe. However, its nature is still unknown. Therefore, the study of dark matter is a rapidly evolving field. New techniques and methods are being applied all the time. The measurement of the direction of WIMP-induced nuclear recoils is a challenging strategy to extend dark matter searches beyond the neutrino floor...
The international Electron Proton Ion Collider (ePIC) experiment collaboration has formed to design and construct the first detector to be ready at the beginning of operation of the Electron-Ion Collider (EIC), a new collider to be built at the Brookhaven National Laboratory. This new facility aims to understand the properties of nuclear matter and its emergence from the underlying partonic...
Duration: 14'+4'
The Large Hadron-electron Collider and the Future Circular Collider in electron-hadron mode [1] will make possible the study of DIS in the TeV regime providing electron-proton collisions with instantaneous luminosities of $10^{34}$ cm$^{−2}$s$^{−1}$. In this talk we will review the opportunities for measuring standard and anomalous top quark couplings, both to lighter quarks...
A first measurement of the 1-jettiness event shape observable in neutral-current deep-inelastic electron-proton scattering is presented. The 1-jettiness observable $\tau_{1b}$ is defined such that it is equivalent to the thrust observable defined in the Breit frame. The data were taken in the years 2003 to 2007 with the H1 detector at the HERA ep collider at a center-of-mass energy of 319 GeV...
We update our analysis of D meson mixing including the combined analysis of B and D decays. We derive constraints on absorptive and dispersive CP violation by combining all available data. We also provide posterior distributions for observable parameters appearing in D physics, as well as for the CKM phase gamma.
The Large Hadron-electron Collider and the Future Circular Collider in electron-hadron mode [1] will make possible the study of DIS in the TeV regime providing electron-proton (nucleus) collisions with per nucleon instantaneous luminosities around $10^{34}$($10^{33}$) cm$^{−2}$s$^{−1}$ by colliding a 50-60 GeV electron beam from energy-recovery linac with the LHC/FCC hadron beams concurrently...
Non-linear memory is one of the most intriguing predictions of general relativity which is generated by the passage of gravitational waves leaving the spacetime permanently deformed. A GW signal from for example binary black hole can be thought of having two parts the oscillatory part which is known as the “chirp” and a much fainter non-oscillatory (DC like) part which is the non-linear...
The LUX-ZEPLIN (LZ) dark matter search experiment is a dual-phase xenon time projection chamber operating at the Sanford Underground Research Facility in Lead, South Dakota, USA. It is comprised of 10-tonnes of liquid xenon, outfitted with photomultiplier tubes in both the central and the self-shielding regions. This is then enclosed within an active gadolinium-loaded liquid scintillator veto...
The smallness of neutrino masses, together with neutrino oscillations could be pointing to physics beyond the standard model, can be naturally accommodated by the so-called "seesaw" mechanism, in which new Heavy Neutral Majorana Leptons (HNL) are postulated. Several models with HNLs exist that incorporate the seesaw mechanism, sometimes also providing a DM candidate or giving a possible...
We present new soliton solutions in a class of four-dimensional supergravity theories. For special values of the parameters, the solutions can be embedded in the gauged maximal N=8 theory and uplifted in the higher-dimensional D=11 theory. We also find BPS soliton configurations, preserving a certain fraction of supersymmetry.
Solitons play a special role in classical physics as well as in...
Domain Walls (DW) are 2-dimensional topological defects predicted by several theories beyond the Standard Model. They are expected to arise from the breaking of a discrete symmetry in the early universe. The motion and the eventual annihilation of these objects are projected to generate a stochastic background of gravitational waves (GW), that could in principle be probed by ground-based GW...
The CMS experiment at CERN uses a two-stage trigger system to filter and store events of physics importance: a hardware-based Level 1 (L1) trigger that uses fast electronics (based on FPGA's and ASIC's) to process data in a pipeline fashion at 40 MHz with an output rate of around 100 kHz and a software-based High-Level Trigger (HLT) run on computer farms with an average output rate of around...
In this talk, we present two gauge models for light-dark matter: one with an exotic positive charged lepton and the other one is a variant with right-handed neutrinos. The scalar self-interacting dark matters are stable without imposing new symmetry and should be weak-interacting. We study the impact of the self-interacting light dark matter on the formation of the dark halo, the observation...
Neutrinos are the most elusive particles known. Heavier sterile neutrinos mixing with the Standard Model partners might solve the mystery of the baryon asymmetry of the universe and take part in the mass generation mechanism for the light neutrinos. Future lepton colliders, including e+e− Higgs factories, as well as multi-TeV electron and muon machines, will provide the farthest search reach...
The NEXT experiment searches for the neutrinoless double beta decay in Xe-136 using a series of detectors based on the high pressure xenon gas time projection chamber (HPXeTPC) technology. The previous stage of this family of detectors was NEXT-White, the first radiopure detector of the NEXT series, with 5kg of Xe. Its goals were a detailed assessment of the backgrounds for Xe-136 double beta...
High intensity beams provide a significant challenge to DAQ systems, in particular when reading out many sensors. The MUonE experiment has been conducting beam tests using the M2 muon beam at CERN, with in-spill intensity of $5 \times 10^7$ muons/s, using silicon strip sensors with a bandwidth of 5 Gb/s per module. A pilot run is scheduled for late summer, which will incorporate several such...
The Large Hadron-electron Collider and the Future Circular Collider in electron-hadron mode [1] will make possible the study of DIS in the TeV regime providing electron-proton (nucleus) collisions with per nucleon instantaneous luminosities around $10^{34}$ ($10^{33}$) cm$^{−2}$s$^{−1}$. In this talk we review the opportunities that these proposals offer for the determination of the partonic...
Duration: 14'+4'
Future Higgs Factories will allow the precise study of $e⁺e⁻\rightarrow q\bar{q}$ with $q=s,c,b,t$ interactions at different energies, from the Z-pole to high energies never reached before.
In this contribution, we will discuss the experimental prospects for the measurement of differential observables in $e⁺e⁻\rightarrow b\bar{b}$ and $e⁺e⁻\rightarrow c\bar{c}$ processes at...
We propose new methods to determine the $\Upsilon(4S)\to B^+B^-$ and $\Upsilon(4S)\to B^0\overline B^0$ decay rates. These rates and their ratio are some of the limiting uncertainties in absolute branching fraction measurements, and thereby for a variety of applications, such as flavor symmetry relations. The new methods we propose are based in one case on exploiting the $\Upsilon(5S)$ data...
Dark matter is believed to account for 85$\%$ of the matter of the Universe. The lead dark matter candidate is the WIMP (weakly interacting massive particles). Light dark matter refers to WIMP candidates with a mass of less than 1 GeV. The concept of light DM has been developed in order to explain the 511 keV $\gamma$-ray from the galactic bulge, as observed by the INTEGRAL satellite. There...
We present an analysis of neutrinoless double beta decay (DBD) mediated by non-interfering exchange of light and heavy neutrinos, in the context of current calculations of nuclear matrix elements (NME) in different nuclear models.
We derive joint upper bounds on the light and heavy contributions to the Majorana effective mass through an updated combination of the latest data from the...
The High-Luminosity LHC will open an unprecedented window on the weak-scale nature of the universe, providing high-precision measurements of the standard model as well as searches for new physics beyond the standard model. Such precision measurements and searches require information-rich datasets with a statistical power that matches the high-luminosity provided by the Phase-2 upgrade of the...
MicroBooNE is an 85-tonne active mass liquid argon time projection chamber (LArTPC) at Fermilab. With an excellent calorimetric, spatial and energy resolution, the detector was exposed to two neutrino beams between 2015 and 2020. These characteristics make MicroBooNE a powerful detector not just to explore neutrino physics, but also for Beyond the Standard Model (BSM) physics. Recently,...
LUXE (Laser Und XFEL Experiment) is a new experiment in planning in Hamburg, which will study Quantum Electrodynamics at the strong-field frontier. LUXE intends to measure the positron production rate in this unprecedented regime by using, among others, a silicon tracking detector. The large number of expected positrons traversing the sensitive detector layers results in an extremely...
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 $\text{fb}^{-1}$ collected at the PEP-II $e^+e^-$...
Gravitational wave detection is a powerful tool that provides us with new ways to understand the universe. However, certain parameters, such as inclination and distance, are degenerate. This limitation hinders our ability to accurately measure other important factors like precession. Breaking the degeneracy between inclination and distance can also give us new insights into formation channels...
Duration: 14'+4'
The LUXE experiment (Laser Und XFEL Experiment) is an 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 pulse and 16.5 GeV electrons from the XFEL electron beam, as well as collisions between the laser pulse and high-energy secondary photons. This will elucidate...
The Future Circular Collider (FCC) is a post-LHC project aiming at direct and indirect searches for physics beyond the SM in a new 91 km tunnel at CERN. The abundant production of beauty and charm hadrons in the $8\times 10^{12}$ Z boson decays expected in e+e- collisions at FCC-ee offers outstanding opportunities in flavour physics with b and c hadron samples that exceed those available at...
We present FMNLO, a framework to combine general-purpose Monte Carlo generators and fragmentation functions (FFs). It is based on a hybrid scheme of phase-space slicing method and local subtraction method, and is accurate to next-to-leading order (NLO) in QCD. The new framework has been interfaced to MG5_aMC@NLO and made publicly available in this work. We demonstrate its unique ability by...
The Short-Baseline Near Detector (SBND) is a 112-ton liquid argon time projection chamber (LArTPC) detector located 110-meters downstream the Booster Neutrino Beam target at Fermilab. As the near detector of the Short-Baseline Neutrino Program, SBND is especially sensitive to any new particles produced in the beam. In addition to the excellent spatial and energy resolution of the LArTPC...
Dark matter is a mysterious and elusive form of matter in our Universe of which we can only measure gravitational effects. According to the most accredited theoretical models, dark matter particles in our galaxy might annihilate and produce standard model particle-antiparticle pairs which, traveling through the galaxy, can reach the Earth and be detected by space-borne experiments such as...
Observation of the neutrinoless double-beta ($0\nu\beta\beta$) decay, a process forbidden in the Standard Model, would demonstrate lepton number violation and provide key insights into matter-antimatter asymmetry of the Universe and the Majorana nature of neutrino. It is a challenging quest that requires experimental conditions ensuring little to no background, superb energy resolution, and...
By means of the code HARM_COOL, which works for conservative relativistic magnetohydrodynamics, we developed a new scheme for the simulation of system formed after compact binary merger. Our code works with a tabulated equation of state of dense matter, accounts for the neutrino leakage, and follows the mass outflows via tracer particle method.
I will discuss the numerical scheme, and compare...
We study the one loop renormalisation of 4d SU(N) Yang-Mills theory with M adjoint representation scalar multiplets. We calculate the coupled one-loop renormalization group flows for this theory by developing an algebraic description, which we find to be characterised by a non-associative algebra of marginal couplings. The 4d one loop beta function of the gauge coupling $g^2$ vanishes for the...
The Quantum Angle Generator (QAG) is a new quantum machine learning model designed to produce precise images on current Noise Intermediate Scale (NISQ) Quantum devices. The QAG model uses variational quantum circuits as its core, and multiple circuit architectures are evaluated. With the addition of the MERA-up sampling architecture, the QAG model achieves exceptional results that are analyzed...
Duration: 12'+3'
One of the most intriguing indication of a theory beyond the Standard Model is the well-known discrepancy between the theoretical prediction of the muon anomalous magnetic moment $a_\mu = (g-2)_\mu/2$ and its experimental value. Another possible explanation for this inconsistency is the incorrect evaluation of the Hadronic Leading Order (HLO) contribution $a_\mu^{HLO}$, which...
We analyze the implications of current $b \to s \ell \ell$ ($\ell=e, \, \mu$) measurements on several $B \to K^* \tau^+ \tau^-$ observables under the assumption that the possible new physics can have both universal as well as nonuniversal couplings to leptons. For these new physics solutions, we intend to identify observables with large deviations from the Standard Model (SM) predictions as...
The tracking performance of the ATLAS detector relies critically on its 4-layer Pixel Detector. As the closest detector component to the interaction point, this detector is subjected to a significant amount of radiation over its lifetime. At the start of the LHC proton-proton collision RUN3 in 2022, the innermost layer IBL, consisting of planar and 3D pixel sensors, had received an integrated...
Ultra-low mass primordial black holes (PBH) which may briefly dominate the energy density of the universe but completely evaporate before the big bang nucleosynthesis (BBN), may lead to interesting observable signatures. We propose a novel test of this scenario by detecting its characteristic doubly peaked gravitational wave (GW) spectrum in future GW observatories. Here the first-order...
Particle track reconstruction plays a crucial role in the exploration of new physical phenomena, particularly when rare signal tracks are obscured by a significant background. In muon colliders where beam muons interacting with the detector produce secondary and tertiary background particles, track reconstruction can be computationally intensive due to the large number of detector hits. The...
Duration: 12'+3'
The MUonE experiment aims to measure the differential cross section of the $\mu e$ elastic scattering using the CERN SPS muon beam with mean energy of 160 GeV onto atomic electrons of a low-Z target. Thanks to the intense M2 beam with in-spill intensity of $5 \times 10^7$ muons/s, a precise measurement of the scattering angles allows to extract the running QED coupling, and...
The Any Light Particle Search II (ALPS II) experiment searches for axions and axion-like particles (ALPs) in an important parameter space that is relevant in understanding anomalous astrophysical phenomena, including stellar evolution. ALPS II takes advantage of the axion coupling to photons using a resonantly enhanced Light-Shining-through-a-Wall (LSW) technique. Photons created using a...
The KATRIN experiment aims to measure the neutrino mass by precision spectroscopy of tritium β-decay. Recently, KATRIN has improved the upper bound on the effective electron-neutrino mass to 0.8 eV/c² at 90% confidence level [1] and is continuing to take data for a target sensitivity of 0.2 eV/c².
In addition to the search for the neutrino mass, the ultra-precise measurement of the β-spectrum...
A new type of radio frequency timer of keV energy electrons will be presented. It is based on a helical deflector, which performs circular or elliptical sweeps of keV electrons, by means of radio frequency fields in a frequency range of 500–1000 MHz. By converting a time distribution of incident electrons to a hit position distribution on a circle or ellipse, this device achieves extremely...
The strategies for and the performance of the CMS tracker alignment during the ongoing Run 3 data-taking period are described. The results of the very first tracker alignment for Run 3 data reprocessing performed with cosmic rays and collision tracks recorded at the unprecedented center of mass energy of 13.6 TeV are presented. Also, the performance after deployment of a more granular...
New pseudoscalar (A) and scalar (H) states are predicted by many models with an extended Higgs sector, such as two-Higgs Doublet Models (2HDMs), which add a second Higgs doublet to the SM. In 2HDMs of type II, these states decay predominantly to ttbar, provided that they are massive enough (m > 400 GeV) and that the ratio between the vacuum-expectation-values of the two Higgs doublets ($\tan...
The field emission effect is a serious problem that degrades the performance of superconducting cavities. Metallic contaminants, surface curvature, and insufficient surface cleaning can cause electron emission. Field emission typically occurs at the GeV-scale, but it can be also observed within the MeV-scale electric field of superconducting cavities. This is because metallic contaminants can...
The ATLAS Forward Proton Time-of-Flight detector: use and projected performance for LHC Run 3 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...
The LHC physics program requires a robust and efficient reconstruction of the trajectories of charged particles, as well as precise measurement of primary and secondary vertices and impact parameters. The radiation damage introduced by high particle fluxes at the interaction region is also to be considered, given its influence on the particle position measurements. In order to exploit the...
Measurements of two- and multi-particle azimuthal correlations provide valuable information on the properties of the system created in collisions of hadrons and nuclei at high energy. In particular, they revealed an unexpected collective behaviour in small collision systems similar to the one exhibited by the quark-gluon plasma in heavy-ion collisions. The origin of collectivity in small...
We present a new theory to predict dark matter (DM) particle mass, size, lifetime, and properties of possible dark radiation from DM particle decay. In the dynamics of self-gravitating collisionless dark matter, the existence of inverse mass and energy cascade from small to large scales facilitates the hierarchical structure formation. A scale-independent constant rate of energy cascade...
In recent times several signatures of beyond standard model (SM) physics have appeared in a number of observables related to the semi-leptonic decays of B mesons. Further, the magnetic moment of muon also shows deviation from SM at the level of 4 sigma. A number of proposed new physics models can accommodate these anomalies. A class of these models also contain dark matter (DM) candidates. We...
Utilising data from the direct detections of compact binary coalescences (CBCs) in the first three observing runs of the LIGO-Virgo-KAGRA Collaboration (LVK), we estimate the redshift dependence of the binary black hole (BBH) population. Specifically, we search for signs that the mass distribution of BBHs varies over cosmic history. The detection of such variation would allow us to gain more...
As prerequisite to any physics exploration excellent performances of physics object are essential ingredients to a successful scientific programme. Electrons and Photons play a crucial role at LHC in several fields. Several analyses such as SM precision measurements, measurements in the Higgs sector, and searches for processes beyond the SM, rely on excellent electron and photon...
In recent years, high-gradient, symmetric focusing with active plasma lenses has regained significant interest due to its potential advantages in compactness and beam dynamics compared to conventional focusing elements. A promising application could be optical matching of highly divergent positrons from the undulator-based ILC positron source into the downstream accelerating structures to...
The Cosmic Background (CB) is defined as the isotropic diffuse radiation field with extragalactic origin. Different astrophysical sources dominate the CB emission at different energies, such as stars in the optical or active galactic nuclei in X-rays. Assuming that dark matter consists of axions with masses on the order of electron volts or higher, we expect an additional contribution to the...
With the ambition to maintain competitiveness of European accelerator-based research infrastructures and to enable Europe’s Green Deal, it has been proposed to Innovate for Sustainable Accelerating Systems (iSAS) [1]. iSAS aims to broaden, expedite and amplify the development and impact of novel energy-saving technologies to accelerate particles with enhanced collaborations. Presently, the...
The multipurpose JUNO Experiment located in China, whose central detector uses 20 kt liquid scintillator, is on track to completion of construction in 2023. Its primary goal is to determine the Neutrino Mass Ordering by leveraging its large target mass and excellent energy resolution of 3% at 1 MeV. The unique properties of JUNO position it to have a large potential for real-time solar...
The JUNO-TAO detector is a satellite detector of the Jiangmen Underground Neutrino Observatory (JUNO) and it will be placed near the core of the Taishan nuclear power plant. It is a liquid based scintillator that will provide a precise measurement of the nuclear antineutrino spectra improving the sensitivity of JUNO on the correct mass ordering studies. Furthermore, JUNO-TAO will provide...
In particle physics, Monte Carlo (MC) event generators are needed to compare theory to the measured data. Many MC samples have to be generated to account for theoretical systematic uncertainties, at a significant computational cost. Therefore, the MC statistic becomes a limiting factor for most measurements and the significant computational cost of these programs a bottleneck in most physics...
We present a measurement of the jet mass distribution in fully hadronic decays of boosted top quarks with full Run 2 data. The measurement is performed in the lepton+jets channel of top quark pair production. The top quark decay products of the all-hadronic decay cascade are reconstructed with a single large-radius jet with transverse momentum greater than 400 GeV. The top quark mass is...
Relativistic heavy-ion beams at the LHC are accompanied by a large flux of equivalent photons, leading to photon-induced processes. Measurements of photon-induced production of tau lepton pairs can be used to constrain the tau lepton's anomalous magnetic dipole moment (g-2). This work presents a recent ATLAS measurement using muonic decays of tau leptons in association with electrons and...
Determining the number of collisions delivered by the LHC inside the ATLAS detector is a key part of the ATLAS luminosity program. Several sub-detectors and algorithms are used, among which is the track counting method. This method assumes that the number of charged particle tracks reconstructed from the ATLAS Inner Detector is proportional to the number of simultaneous collisions, thereby...
As the planning phases for a high-energy muon collider move into a new era, the issue of what new physics could be discovered becomes crucial. The discovery of neutrino oscillations has shown that neutrinos are massive and mixed, necessitating an extension of the Standard Model. In these extensions, neutrinos can acquire new interactions, namely neutrino non-standard interactions. On the other...
The NaNu experiment aims to study muon and tau neutrino interactions in the energy range of 10-60 GeV at the CERN SPS collider and consists of two detector components. The passive detector component of NaNu will utilise emulsion detector planes interleaved with tungsten absorber plates and MicroMegas detectors. The active detector will employ an array of MicroMegas detectors equipped with...
Non-minimal simplified extensions of the Standard Model have gained considerable currency in the context of dark matter searches at the LHC, since they predict
enhanced mono-Higgs and mono-W/Z signatures over large parts of the parameter space.
However, these non-minimal models obviously lack the simplicity and directness of the
original simplified models, and are more heavily dependent on...
The radio galaxy Messier 87 (M87) has an active galactic nucleus which enables us to observe it at very high energy gamma rays. Photons from M87 have been observed at up to a few 10s of TeV using the H.E.S.S. telescope array. During monitoring campaigns and target of opportunity observations, several high flux states could be identified, which allow us to probe the Extragalactic Background...
The flavor symmetry-breaking scale in the Froggatt-Nielsen (FN) mechanism is very weakly constrained by present experiments and can lie anywhere between a few TeVs and the Planck scale. We construct two ultraviolet-complete models that generate the FN mechanism, with a global $U(1)_{\rm{FN}}$ flavor symmetry and a single flavon field. Using the one-loop finite temperature effective potential,...
We investigate the potential of the ratios $R_{\tau \mu}$ in $B \to K \ell \ell$ and $B \to K^* \ell \ell$ decays ($\ell=\mu,\,\tau$) to probe new physics in the $\tau-\mu$ sector. We find that this ratio deviates from their SM prediction even for universal couplings. This implies that the bare deviation of these ratios from their SM predictions cannot confirm the nature of possible new...
The e+e- collisions at the Z-pole energy at the Future Circular Collider (FCC) present trillions of B-hadrons of all species in a clean experimental environment. The purely leptonic $B^+_c \to \tau^+ \nu_\tau$ and $B^+ \to \tau^+ \nu_\tau$ decays provide excellent probes of the $b \to q \tau \nu$ transition, complementary to the semileptonic decay modes. The prospects of precise measurements...
The Jiangmen Underground Neutrino Observatory (JUNO) is a next-generation large liquid-scintillator neutrino detector. Its primary goal is the determination of neutrino mass ordering (NMO). JUNO's main sensitivity to NMO comes from reactor neutrino measurements. However, high-energy (GeV level) atmospheric neutrino measurements can also independently probe NMO, potentially enhancing JUNO's...
The Phase-2 upgrade of the CMS detector for the high luminosity era of the LHC, will install a new tracking system to cope with the increased pileup and track multiplicity. The inner layers of the outer tracker will be equipped with pixel-strip (PS) modules that have a high segmentation to provide an accurate position measurement. A PS module contains two types of silicon sensors, namely,...
The Jiangmen Underground Neutrino Observatory (JUNO) is a neutrino experiment under construction with a broad physics program. The main goals of JUNO are the determination of the neutrino mass ordering and the high-precision measurement of neutrino oscillation properties with anti-neutrinos produced in commercial nuclear reactors. High-quality reconstruction of reactor neutrino energy is...
Vector boson scattering is a key production process to probe the electroweak symmetry breaking of the standard model, since it involves both self-couplings of vector bosons and coupling with the Higgs boson. If the Higgs mechanism is not the sole source of electroweak symmetry breaking, the scattering amplitude deviates from the standard model prediction at high scattering energy. Moreover,...
At the CMS experiment, a growing reliance on the fast Monte Carlo application (FastSim) will accompany the high luminosity and detector granularity expected in Phase 2. The FastSim chain is roughly 10 times faster than the application based on the GEANT4 detector simulation and full reconstruction referred to as FullSim. However, this advantage comes at the price of decreased accuracy in some...
A search is presented for Higgs boson pair production (HH) associated with a vector boson V (W or Z boson) with 138 fb^−1 of proton-proton (pp) collisions at a center-of- mass energy of 13 TeV with the CMS detector at the LHC at CERN. The processes in this search include ZHH and WHH production. All hadronic decays and leptonic decays of W and Z bosons involving electrons, muons, and neutrinos...
The Karlsruhe Tritium Neutrino (KATRIN) experiment is designed to determine the effective electron antineutrino mass with a nominal sensitivity of $0.2\,\mathrm{eV}c^{-2}$. This is achieved by a direct kinematic approach, where the mass square $m_\nu^2$ is inferred from the shape of the electron energy spectrum of molecular tritium beta decay. The unique experimental setup allows for...
Supersymmetry remains one of the most popular Beyond Standard Model theories proposing solutions to the limitations of the Standard Model, e.g. the naturalness problem and the lack of a viable dark matter candidate. However, the lack of signs for supersymmetric particles at the LHC imposes strong constraints on the simplest versions of supersymmetry. One natural solution is to abandon the...
This poster presents a search for lepton-flavor violating decays of the Higgs boson to an electron-muon pair using data from proton-proton collisions at √s = 13 TeV collected by the CMS experiment at the LHC. The dataset corresponds to an integrated luminosity of 138 fb−1. No significant excess of events is observed for the 125 GeV Higgs, leading to the most stringent upper limits so far on...
Till today, although the Standard Model (SM) is the most celebrated theory that explains nature almost completely, there are still some phenomena observed in nature that the SM cannot explain. That is why it is needed to look for theories beyond the Standard Model (BSM). While the ATLAS/CMS experiments discovered a Standard Model-like Higgs boson at the Large Hadron Collider (LHC), no...
The Mu2e experiment at the Fermilab will search for a coherent neutrinoless conversion of a muon into an electron in the field of an aluminum nucleus
with a sensitivity improvement by a factor of 10,000 over existing limits.
The Mu2e Trigger and Data Acquisition System (TDAQ) uses \emph{otsdaq} framework as the online Data Acquisition System (DAQ) solution.
Developed at Fermilab,...
The future electron-positron colliders offer excellent facilities for SUSY
searches. With respect to previous e+e- colliders, they increase the luminosity
and centre-of-mass energy and improve the technologies, while, with
respect to hadron colliders, they offer a cleaner environment, a known
initial state and a triggerless operation of the detectors.
Moreover, in contrast to hadron...
SUPAX is one of the first RF cavity based haloscope experiments in Germany to search for axions. Axions could solve the well known strong CP problem and may explain the dark matter content of the universe.
Axions are expected to convert to photons in the presence of a strong magnetic field, where the photon frequency depends on the axions mass. For wavelengths in the microwave regime...
Sustainability is an increasingly important topic in the public discourse, and has become a prioritized goal in the design, planning and implementation of future accelerators; approaches to improved sustainability range from overall system design, optimization of subsystems and key components, to operational concepts. A direct quantification of the ecological footprint, be it greenhouse gas...
The high-luminosity upgrade of the LHC will result in an increase of the typical instantaneous luminosity by a factor of about four. In order to cope with the new conditions, such as higher levels of radiation damage, larger pileup, and higher data load, the CMS detector will require substantial upgrades. As part of this upgrade program, the entire silicon tracking detector will be renewed....
We motivate and describe a method based on fits with polynomials to test the smoothness of differential distributions. As a demonstration, we apply the method to several measurements of inclusive jet double-differential cross section in the jet transverse momentum and rapidity at the Tevatron and LHC. This method opens new possibilities to test the quality of differential distributions used...
In view of the HL-LHC, the Phase-2 CMS upgrade will replace the entire trigger and data acquisition system. The detector readout electronics will be upgraded to allow a maximum L1 accept rate of 750 kHz, and a latency of 12.5 µs. The muon trigger is a multi-layer system that is designed to reconstruct muon stubs on each muon station and then to measure the momenta of the muon by correlating...
For the HL-LHC phase, the calorimeter endcap of the CMS detector will be upgraded with a High Granularity Calorimeter (HGCAL), a sampling calorimeter that will use silicon sensors as well as scintillator tiles read out by silicon photomultipliers (SiPMs) as active material (SiPM-on-tile). The design of the SiPM-on-tile section was inspired by the CALICE AHCAL. The complete HGCAL will be...
The effective electroweak mixing angle has been measured with high precision in hadron collider experiments at the Tevatron and the LHC. These measurements use different sets of parton distribution functions (PDFs) and theoretical frameworks. This fact, together with unknown correlations, makes a concise combination of these measurements impossible. We present a study of the dominant source of...
In relativistic heavy-ion collisions, the final state collectivity is characterized by the anisotropic flow, measured through flow vector estimations. Hydrodynamics calculations and experimental data show that the flow vector fluctuates as a function of particle transverse momenta event-by-event, indicating fluctuations in the initial energy density of the nuclear collisions. In heavy-ion...
In this study, we investigate the use of state-of-the-art classifiers, including graph networks and transformer-based architectures, for anomaly detection at the Large Hadron Collider (LHC). Traditionally, these classifiers have been used primarily for classification (signal or background) tasks. However, we investigate their potential as anomaly detection algorithms with the goal of...
