Conveners
T08: Flavour Physics and CP Violation: Part 1
- Jorge Martin Camalich (Instituto de Astrofisica de Canarias)
- Shikma Bressler (Weizmann Institute of Science)
T08: Flavour Physics and CP Violation: Part 2
- Trabelsi Karim (BELLE (BELLE II Experiment))
- Francesco Dettori (Università degli Studi di Cagliari)
T08: Flavour Physics and CP Violation: Part 3
- Alexander Glazov (BELLE (BELLE II Experiment))
- Jorge Martin Camalich (Instituto de Astrofisica de Canarias)
T08: Flavour Physics and CP Violation: Part 4
- Shikma Bressler (Weizmann Institute of Science)
- Jorge Martin Camalich (Instituto de Astrofisica de Canarias)
T08: Flavour Physics and CP Violation: Part 5
- Nuno Leonardo (LIP & IST)
- Francesco Dettori (Università degli Studi di Cagliari)
T08: Flavour Physics and CP Violation: Part 6
- Trabelsi Karim (BELLE (BELLE II Experiment))
- Alexander Glazov (BELLE (BELLE II Experiment))
T08: Flavour Physics and CP Violation: Part 7
- Nuno Leonardo (LIP & IST)
- Shikma Bressler (Weizmann Institute of Science)
T08: Flavour Physics and CP Violation: Part 8
- Nuno Leonardo (LIP & IST)
- Francesco Dettori (Università degli Studi di Cagliari)
We report new results of the branching fractions $\mathcal{B}(\bar{B}^0\to D^{*+}\pi^{-})$ and $\mathcal{B}(\bar{B}^0\to D^{*+}K^{-})$ measured using $772\times 10^{6}$ $B$-meson pairs recorded by the Belle experiment. The ratio of the branching fractions is measured in a way that allows for the cancellation of systematic uncertainties arising from the $D$-meson reconstruction. Furthermore, we...
Inclusive semi-leptonic decays of $B$ mesons are an excellent avenue for the study of B\bar{B} mixing, given their large branching fraction. In this talk, we present the measurement of the time integrated mixing parameter, $\chi_d$, using data collected by the Belle II detector. The Belle II experiment is located at the SuperKEKB laboratory in Tsukuba, Japan where electron-positron collisions...
In the Standard Model, CP violation in the Electroweak sector is parametrized by the Jarlskog Invariant. This is the flavor invariant sensitive to CP violation with the least number of Yukawa matrices that can be built. When higher dimensional operators are allowed, and the Standard Model Effective Field Theory is constructed, numerous new sources for CP violation can appear. However, the...
Flavour physics represents a unique test bench for the Standard Model (SM). New analyses performed at the LHC experiments are now providing unprecedented insights into CKM metrology and new results for rare decays. The CKM picture can provide very precise SM predictions through global analyses.
We present here the results of the latest global SM analysis performed by the UTfit collaboration...
While the axion was originally introduced to "wash out" CP violation from strong interactions, new sources of CP violation beyond QCD (needed e.g. for the matter-antimatter asymmetry) might manifest themselves via a tiny scalar axion-nucleon component. The latter can be experimentally probed in axion-mediated force experiments, as suggested long ago by J.E. Moody and F. Wilczek. In the present...
BESIII has collected 2.9 of e+e- collision data sample at 3.773 GeV. We report recent measurements of strong phase differences in D0 and D0-bar decays of KSpi+pi-, KSK+K-, K-pi+pi+pi- and K-pi+pi0. The obtained parameters are important to reduce the systematic uncertainty in the gamma/phi_3 measurement at LHCb and Belle II.
The tree-level determination of the CKM angle gamma is a standard candle measurement of CP violation in the Standard Model. The latest LHCb results from time-integrated measurements of CP violation using beauty to open charm decays are presented. A new combination of all LHCb measurements is also performed. A precision of four degrees is obtained, which dominates the world average.
Measurements of CP asymmetries in charmless two-body B-meson decays can be a powerful way to provide stringent tests of the Standard Model. In particular a longstanding anomaly in the CP asymmetries of B decays to a kaon and a pion, known as the K$\pi$ puzzle, can be a hint of physics beyond the Standard Model. We present new results from the analyses of charmless 2-body B decays with kaons...
The flavor mixing parameter $\Delta \Gamma_{12}^s$ that governs the lifetime differences of neutral $B_s$ mesons suffers from large uncertainties related to the uncalculated perturbative corrections. In this talk I will present new results on the previously unknown NNLO QCD corrections to the $B_s - \bar{B}_s$ mixing process that lead to a reduction of theoretical errors on $\Delta...
The latest studies of beauty meson decays to open charm final states from LHCb are presented. Several first observations and branching fraction measurements using Run 1 and Run 2 data samples are shown. These decay modes will provide important inputs to other analyses, and may be used for future measurements of CP violation.
The Standard Model Effective Field Theory (SMEFT) is a universal way of probing New Physics (NP) manifesting as new, heavy particle interactions with the Standard Model degrees of freedom, that respect the SM gauged symmetries. Higher order terms in the NP interactions possibly lead to large effects, mandatory for meaningful phenomenological studies, such as contributions to neutral...
he CKM angle $\gamma$ ($\phi_3$) of the unitarity triangle is the only one that is accessible with tree-level decays in a theoretically clean way. The key method to measure $\gamma$ is through the interference between $B^+\to D^0 K^+$ and $B^+ \to \bar D^0 K^+$ decays that occurs if the final state of the charm-meson decay is accessible to both the $D^0$ and $\bar D^0$ mesons. The Belle II...
The ATLAS experiment has performed measurements of mixing and CP violation in the neutral B meson systems.
This talk will focus on the latest results from the ATLAS collaboration on CP violation in the B_s^0 —> J/psi phi decays.
Standard Model predicts the CP violating mixing phase, phi_s, to be very small and its SM value is very well constrained,
while in many new physics models large...
Short and long-distance dynamics along with a sizeable effective weak phase caused by the interference between tree and penguin amplitudes in charmless 3-body B decays leads to a rich structure of CP violation as a function of the phase space. We present the latest studies with charmless $B \to 3h$ decays at LHCb, including CP asymmetries and branching fractions
The BESIII experiment at the electron positron collider BEPCII in Beijing is successfully operating since 2008 and has collected large data samples in the tau-mass region, including the world’s largest data samples at the J/ψandψ(2S) resonances. The recent observations of hyperon polarizations at BESIII, which opens a new window for searching new physics beyond the SM, also attracts both...
We report the result of a search for $\tau \to \ell \gamma$ ($\ell = e, \mu$) using the full data sample at Belle. Since the observation of neutrino oscillations has unambiguously shown that the lepton flavor is no longer conserved, we can expect lepton flavor violation (LFV) in the charged lepton sector. Though the standard model (SM) does not predict charged LFV decays at an observable rate,...
The NA62 experiment at CERN collected a large sample of charged kaon decays into final states with multiple charged particles in 2016-2018. This sample provides sensitivities to rare decays with branching ratios as low as 10^{-11}. Results from searches for lepton flavour/number violating decays of the charged kaon and the neutral pion to final states containing a lepton pair based on this...
The first row of the Cabibbo-Cobayashi-Maskawa (CKM) matrix shows a discrepancy of $\sim 3\sigma$ with unitarity, known as the ”Cabibbo Angle Anomaly” (CAA). After reviewing the origin and status of the anomaly, I investigate the various possibilities to explain it in the context of physics beyond Standard Model (BSM) which can be broadly grouped into three categories: modifications of...
The Belle II experiment is a substantial upgrade of the Belle detector and will operate
at the SuperKEKB energy-asymmetric e+e− collider. The design luminosity of the machine
is 8 × 1035 cm−2s−1 and the Belle II experiment aims to record 50 ab−1 of data, a factor
of 50 more than its predecessor. From February to July 2018, the machine has completed a
commissioning run and main operation of...
The Belle experiment has accumulated close to $1\,{\rm ab}^{-1}$ of data in electron-positron collisions at center-of-mass energies around various $\Upsilon(nS)$ resonances. These data can be used to perform a number of new physics searches in the context of dark sector with an unprecedented precision. We present for the first time the results of a search of the dark photon in $B$-meson...
Z-pole operation at FCC-ee offers a unique laboratory for flavor physics, with the anticipated production of 10^12 b-quarks and the opportunity for triggerless data-taking in a clean e+e- collision environment. Using new simulation and analysis tools developed for FCC-ee physics and performance studies, theoretically compelling beauty, charm, and tau decay modes are studied in order to...
The electric dipole moment (EDM) of the neutron is a strong probe of CP violation beyond the Standard Model.
In particular, its value could reveal information on baryogenesis.
We report the latest result from the nEDM collaboration, which operates an experiment to measure the neutron EDM at the Paul Scherrer Institute
using Ramsey’s method of separated oscillating magnetic fields with...
We report the first search for the penguin-dominated process $B_{s} \to \eta^{\prime} X_{s\bar{s}}$ using a semi-inclusive method. In absence of a statistically significant signal, we set a 90\% confidence-level upper limit $1.4 \times 10^{-3}$ on the partial branching fraction where $M(X_{s\bar{s}}) \leq 2.4\,{\rm GeV}$. We also report final results for the $B^{0}_{s} \to D_{s} X$ and...
Though the Belle experiment has stopped data taking more than a decade ago, new results on semileptonic $B$ meson decays are still being obtained. This is in part due to new experimental tools elaborated for Belle II applied to the Belle data set, such as the FEI (Full Event Interpretation) hadronic and semileptonic tag which enables new measurements of $B \to D^{*}\ell\nu$, $B \to...
Precision determinations of $V_{ub}$ and $V_{cb}$ play a central role in precision tests of the CKM sector of the Standard Model and complement direct measurements of CP violation of B meson decays. In this talk, we present first studies towards measurements of $|V_{ub}|$ and $V_{cb}$, with semileptonic decays using collision events recorded at the $\Upsilon(4S)$ resonance by the Belle II...
We present comparisons between the results obtained in the BaBar B ->D*lnu amplitude analysis (PRL 123, 091801 (2019)) in the light of new non-zero recoil lattice data from MILC. We also discuss prospects for probing right-handed currents from a joint lattice + BaBar fit, in a manner independent of the |Vcb| normalization issue.
Determinations of the CKM matrix elements $|V_{ub}|$ and $|V_{cb}|$ or predictions for $R$-ratios testing lepton flavor universality can be obtained from form factors describing exclusive semileptonic $B_{(s)}$ decays. Using the framework of lattice quantum chromodynamics, we report on our form factor calculations for $B_s\to D_s \ell\nu$, $B_s\to K \ell\nu$, and $B\to \pi\ell \nu$ decays....
In Heavy Quark Effective Theory (HQET), measured $B \to D^{(*)} \ell \bar \nu_\ell$ decay rates for light leptons constrain all $B \to D^{(*)}$ semileptonic form factors, both in and beyond the Standard Model (SM). We update our prior HQET-based analysis, carrying out a global fit including newly available measurements of $B \to D^{(*)} \ell \bar \nu_\ell$ decay distributions to predict: the...
The semileptonic b-hadron decays with a heavy lepton are sensitive to new couplings like those generated by charged Higgses or Leptoquarks. The B-Factories and LHCb have previously performed various measurements of these decays, using different approaches and techniques. A global average of these measurements shows a discrepancy with the Standard Model expectations, which is above 3 standard...
Precision determination of the CKM matrix element $|V_{cb}|$ are important to test the unitarity of the CKM matrix and to search for loop-level new physics effects. In this talk, we present a new determination of $|V_{cb}|$ using measured $q^2$ moments from $B \to X_c \ell \bar \nu_\ell$ decays provided by the Belle and Belle II collaborations. This new experimental input is the key ingredient...
The long standing discrepancy between determinations of the CKM matrix element Vub obtained from exclusive and inclusive semileptonic B decays are at the level of 2-3 standard deviations. This discrepancy continues to challenge our understanding of the semileptonic decays on both the theoretical and experimental sides. Exclusive semileptonic Bs decays are in principle under good theoretical...
The Belle II experiment at the asymmetric $e^+e^-$ collider, SuperKEKB, aims to record 50 ab$^{-1}$ of data over the next decade, a factor of 50 more than Belle. During the first 1.5 years of operations, around 90 fb$^{-1}$ of data were collected. This dataset is used to measure the lifetimes of a few charm hadrons, confirming the expected performance of the Belle II detector, in particular...
$K_L \to \pi \nu \nu $ is one of the attractive processes to test new physics beyond the Standard Model (SM). It is drawing attention, thanks to the effort of the KOTO collaboration. In this talk, we briefly study the $K_L$ decay and other relevant flavor violating processes in a class of type-II two Higgs doublet models with extra gauged $U(1)_H$ symmetry. We sort few examples where the...
We report the observation of the rare charm decay $D^0 \to K^-\pi^+e^+e^-$, a search for nine lepton-number-violating and three lepton-flavor-violating neutral charm decays of the type $D^0 \rightarrow h^- h^{'-} \ell^+ \ell^{'+}$, and $D^0 \rightarrow h^- h^{'+} \ell^+ \ell^{'-}$, and a search for seven lepton-number-violating decays of the type $D^{0}\rightarrow X^{0} e^{\pm} \mu^{\mp}$,...
BESIII has collected 2.9 and 6.3 fb-1 of e+e- collision data samples at 3.773 and 4.178-4.226 GeV, respectively. We report recent measurements of the (semi)leptonic decays D(s) -> l+nu (l=mu, tau) and D(s) -> X l+nu [X=K(*), rho, eta('), a_0, K_1, and l=e, mu]. The decay constants f_D(s), the semileptonic form factors f(0) and the CKM matrix elements |V_cs(d)| are determined precisely. These...
The decay K^+→π^+ νν ̅, with a very precisely predicted branching ratio of less than 〖10〗^(-10), is among the best processes to reveal indirect effects of new physics. The NA62 experiment at CERN SPS is designed to study the K^+→π^+ νν ̅ decay and to measure its branching ratio using a decay-in-flight technique. NA62 took data in 2016, 2017 and 2018, reaching the sensitivity of the Standard...
KLOE-2 experiment at the upgraded e+e- DAΦNE collider of the INFN Laboratori Nazionali di Frascati collected about 5 fb$^{-1}$ at the center of mass energy of the $\phi$-meson. Together with the data set of its predecessor (KLOE) the total acquired data sample of 8 fb$^{-1}$ corresponds to 2.4$\times$10$^{10}$ $\phi$-meson produced, which is the largest sample ever collected at the...
The LHCb experiment collected the world's largest sample of charmed hadrons during LHC Run 1 and Run 2. With this data set, LHCb is currently providing the world's most precise measurements of properties and production of known charmed baryons, as well as discovering many previously unobserved states. The latest results from the LHCb Collaboration on charmed baryons are presented.
LHCb has collected the world's largest sample of charmed hadrons. This sample is used to measure $D^0 -\overline{D}^0$ mixing and to search for $C\!P$ violation in mixing and interference. New measurements from several decay modes are presented, as well as prospects for future sensitivities.
Recent results from the proton-proton collision data taken by the ATLAS experiment on the charmonium production and on the B_c production and decays will be presented. The measurement of J/psi and psi(2S) differential cross sections will be reported as measured on the whole Run 2 dataset. The measurement of the differential ratios of the B_c+ and B+ production cross sections at 8 TeV will also...
Recent results from the ATLAS experiment on searches and measurements on exotic heavy hadrons will be presented.
Studies of the pentaquarks with hidden charm in the Lambda_b decays in proton-proton collisions at 7 - 8 TeV will be discussed.
New results on the heavy tetraquarks in the Run 2 data at 13 TeV will also be reported.
The latest results of time-dependent CP Violation in beauty meson decays to charmonia from LHCb are presented, including the CP violating mixing phase phis in Bs → JpsiPhi, using for the first time Jpsi → e+e- . Updates on the measurement of branching ratios are also reported.
The Muon $g-2$ experiment at Fermilab has recently confirmed Brookhaven's earlier measurement of the muon anomalous magnetic moment $a_\mu$. This new result increases the discrepancy $\Delta a_\mu$ with the Standard Model (SM) prediction and strengthens its "new physics" interpretation as well as the quest for its underlying origin. Following the presentations of the new experimental result...
The observations of anomalies in exclusive decays of beauty mesons, with
hints toward possible violation of lepton flavour universality, require new analyses of related processes involving other heavy hadrons, to enlarge the set of observables suitable to test the Standard Model (SM) predictions.
I will present results obtained in the study of decay modes of several hadrons containing a heavy quark.
The NA62 experiment at CERN reports new results from studies of radiative kaon decays 𝐾+→𝑒+𝜈𝛾 (𝐾𝑒2𝛾) and 𝐾+→𝜋0𝑒+𝜈𝛾 (𝐾𝑒3𝛾), using a data sample recorded in 2017--2018. The sample comprises O(10k) 𝐾𝑒2𝛾 candidates and O(100k) 𝐾𝑒3𝛾 candidates with sub-percent background contaminations. Preliminary results with the most precise measurement of the 𝐾𝑒2𝛾 and 𝐾𝑒3𝛾 branching ratios, determination of...
In the recent years, several measurements of $B$-decays with flavor changing neutral currents (FCNC), i.e. $b\to s \ell \ell$ transitions, hint at deviations from the Standard Model (SM) predictions.
A search for the flavor-changing neutral current decay $B^{+}→K^{+}\nu\bar{\nu}$ is performed with data sample corresponding to $63~fb^{−1}$ collected at the Υ(4S) resonance by the Belle II...
We introduce the property of Planck safety as paradigm for model building. Extensions of the SM are constructed featuring vector-like fermions and a flavor matrix scalars. Yukawa interactions interlocking the SM and BSM sector act as flavor portals that allow to address experimental anomalies, while taming Landau poles and stabilizing the Higgs potential up to the Planck scale.
The $BABAR$ detector collected a sample of 122 million $\Upsilon(3S)$ mesons, corresponding to an integrated luminosity of 28 fb$^{-1}$, operating the PEP-II $e^+e^-$ collider at a center-of-mass energy of about 10.355 GeV. This sample is the largest ever collected at that energy and provides unique opportunities to test several aspects of the Standard Model.
We report on a precision...
The Mu2e experiment at Fermilab aims to measure the charged-lepton flavour violating (CLFV) neutrino-less conversion of a negative muon into an electron in the field of a nucleus. The conversion process results in a monochromatic electron with an energy slightly below the muon rest mass (104.97 MeV). The Goal of the experiment is to improve by four orders of magnitude the previous measurement...
Radiative b-hadron decays are sensitive probes of New Physics through the study of branching fractions, CP asymmetries and measurements of the polarisation of the photon emitted in the decay. In particular, these measurements help constraining the size of right-handed currents in extensions of the Standard Model. Large samples of radiative b-decays have been collected by the LHCb experiment...
The coupling of the electroweak gauge bosons of the Standard Model (SM) to leptons is independent of the lepton flavour. Extensions of the SM do not necessarily respect this lepton flavour universality. Semileptonic rare decays of heavy flavour, to which new particles can give sizeable contributions, allow for sensitive tests of lepton flavour universality, and constitute powerful indirect...
Significant deviations from SM predictions have been observed in $ b \to s \mu^+ \mu^-$ decays and in the muon (g-2). Scalar leptoquark extensions of the SM are known to be able to address these anomalies, but generically give rise to lepton flavor violation (LFV) or even proton decay. We propose new muon flavored gauge symmetries as a guiding principle for leptoquark models that preserve the...
Rare b->sll decays are flavour-changing neutral-current processes that are forbidden at the lowest perturbative order in the Standard Model (SM). As a consequence, new particles in SM extensions can significantly affect the branching fractions of these decays and their angular distributions. The LHCb experiment is ideally suited for the analysis of these decays due to its high trigger...
Recent measurements of lepton-universality ratios and $B_s\to\mu^+ \mu^-$ decay point to possible new physics contribution to $b\to s \mu^+ \mu^-$ transitions. If new physics really is present, then it is possible that it could lie at a scale beyond the kinematical reach of the LHC or even that of a future, more energetic, proton-proton collider. In this instance, the relevant new physics is...
$SU(2)_L$-invariance links charged dilepton $\bar{q}\,q^\prime\,\bar{\ell}\,\ell$ and dineutrino $\bar{q}\,q^\prime\,\bar{\nu}\,\nu$ couplings. This connection can be established using SMEFT and holds if only SM-like left-handed light neutrinos are present. It allows to perform complementary experimental tests of lepton universality and charged lepton flavor conservation with flavor-summed...
Recently, LHCb has confirmed the evidence for lepton flavour universality violation in the $R_K$ ratio with 3.1$\sigma$ significance. We present new physics implications within a model-independent approach and make projections for future measurements that indicate that LHCb will be in the position to discover lepton non-universality with the Run 3 data in a single observable. We also present...
Rare decays provide a sensitive laboratory to search for New Physics. Recent CMS results concerning rare decays are presented.
Decays of b-hadrons that are very suppressed in the Standard Model, such as fully leptonic flavour-changing neutral-current transitions or lepton flavour violating decays, are particularly clean probes for New Physics. The LHCb experiment is designed for the study of b-hadron decays and ideally suited for the analysis of very rare decays due to its high trigger efficiency, as well as excellent...
We present a fully automated procedure providing an easy way to perform,
systematically, phenomenological analysis in flavour physics for general
BSM scenarios. This procedure is model independent and requires as input
only the Lagrangian of the theory. Once the Lagrangian has been defined,
all tree and loop-level Wilson coefficients are calculated symbolically
by MARTY, and from those...
We are presenting our ongoing Lattice QCD study on $B - \bar{B}$ mixing on several RBC/UKQCD and JLQCD ensembles with 2+1 dynamical-flavour domain wall fermions, with a range of inverse lattice spacings from 1.7 to 4.5 GeV and including physical-pion-mass ensembles. We compare various different fitting strategies to extract bag parameters $B_{B_d}$ and $B_{B_s}$ both for the standard-model...
Baryogenesis in the early universe requires a new source of CP violation beyond that in the CKM model. Perhaps the most promising place to look is in the Higgs sector. Though the Standard Model predicts that the couplings of the Higgs boson are exactly CP-conserving, more general models of the Higgs sector give many opportunities for CP violation. This talk will discuss the expectations for...
The experimental measurements on flavour physics, in tension with Standard Model predictions, exhibit large sources of Lepton Flavour Universality violation. We perform an analysis of the effects of the global fits to the Wilson coefficients assuming a model independent effective Hamiltonian approach, by including a proposal of different scenarios to include the New Physics contributions. A...
It is customary to apply the so-called narrow width approximation $\Gamma(B\to RP_3\to P_1P_2P_3)=\Gamma(B\to RP_3){\cal B}(R\to P_1P_2)$ to extract the branching fraction of the quasi-two-body decay $B\to RP_3$, with $R$ and $P_3$ being an intermediate resonant state and a pseudoscalar meson, respectively. However, the above factorization is valid only in the zero width limit. We consider a...
Measurements in the $b \to c {\tau}^- \overline{\nu}_{\tau}$ transitions suggest violation of lepton flavor universality. Assuming the flavor anomalies are due to new physics (NP) beyond the Standard Model (SM), we analyse the semileptonic decays of some heavy $b$-baryons to $c$-baryons, $B_b \to B_c {\tau}^- \overline{\nu}_{\tau}$, which are mediated by $b\rightarrow c \tau^-...
Measurements of various lepton flavor universal observables in $b \to\, s\,l^+ l^-$ transition decays continue to disagree with the standard model expectations. The recent update of $R_K$ measurement from LHCb still indicates $3.1\sigma$ deviation from the standard model. Similarly, the measurements of other observables such as $R_{K^*}$, $P_{5}^{\prime}$ and $\mathcal{B}(B_s\, \to\, \phi...
The one-loop contributions to Axion-like-particles (ALPs)-SM couplings stemming from effective ALP operators, including all finite one-loop corrections, are presented. This is the first such analysis for most ALP-SM couplings. The complete leading-order (dimension five) effective linear Lagrangian is considered for an off-shell ALP. The results are timely because the level of experimental...
Decoding the exact Lorentz structure of possible new physics in various $B$ decays involving $b\to\, c\, l\,\nu$ charged current and $b\, \to\, s\, l\,l$ neutral current is very crucial. There still exists a long standing discrepancy in the combined measurements of the ratio of branching ratio $R_{D^{(*)}}$ in $B \,\to\, D^{(*)}\, l\,\nu$ decays which stands $3\sigma$ away from the standard...
New CMS results on B hadron decays involving a charmonium resonance are presented
Based on the 225 million $J/\psi$ data set accumulated at the 3.097 GeV by the BESIII detector, we show searches for the extremely rare process of $J/\psi$ weak decays. We find no obvious signal event for the processes of $J/\psi\to \bar D^0\pi^0, \bar D^0 \eta, \bar D^0 \rho^0, D^-\pi^+$ and $J/\psi \to D^-\rho^+$ and present the most stringent constraints of $10^{-6}$ at 90\% confidence...
The electroweak penguin $B$ decays mediated by $b \to s \ell^{+} \ell^{-}$ transitions are flavour-changing neutral current processes, and are thus sensitive to new physics because of possible contributions of heavy particles in the quantum loop. We report measurements of lepton flavor universality violation observables $R_{K}$ and $R_{K^{*}}$, and other related decays, based on the full data...
I will present a recent application of the SN 1987A cooling bound to set a constraint on dark flavoured sectors. This is possible thanks to the fact that the protoneutron stars are hot and dense environments where hyperons can be efficiently produced. Therefore a decay of the form $Λ→nX^0$, where $X^0$ is a new bosonic dark particle, will be severely constrained. I will explain the ingredients...
In March 2018 the KLOE-2 experiment finished data taking at the upgraded e+e- DAΦNE collider of the INFN Laboratori Nazionali di Frascati. The combined data sample collected by KLOE and KLOE-2 amounts to almost 8 fb$^{-1}$ integrated luminosity and it is the largest existing data sample in the world collected at an e+e- collider at the ϕ meson peak, corresponding to ~2.4 $\times$ 10$^{10}$ ϕ...
Flavour physics represents a unique test bench for the Standard Model. New analyses performed at the LHC experiments are now providing unprecedented insights into CKM metrology and new results for rare decays. The CKM picture can provide very precise Standard Model predictions through global analyses.
The Unitarity Triangle (UT) analysis can also be used to constrain the parameter space in...
