Conveners
Flavour
- Martin Sevior
Flavour: Clarendon Auditorium
- Yuehong Xie (Central China Normal University CCNU (CN))
Flavour: Clarendon Auditorium
- German Valencia (Monash University (AU))
Flavour: Clarendon Auditorium
- Jake Lane (Monash University (AU))
Flavour
- Anjan Giri
Flavour
- Anjan Giri
This talk will provide an overview of recent results on the hadrons with heavy quarks, especially the candidates of exotic states observed at the BESIII, Belle, Belle II, and the LHC experiments.
We shall review some salient features of the data in rare B-meson hadron decays. We shall then discuss fits of various effective field theories which can explain current data.
The NA62 experiment at CERN collected the worldโs 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, and presented in 2021.
In this talk the NA62 experiment reports new results from analyses of $K^+ \rightarrow \pi^+ \mu^+ \mu^-$ and $K^+\rightarrow...
Lepton flavour triality is motivated by flavour symmetry models. Reference ([ https://doi.org/10.1103/PhysRevD.107.055001]) constructed theories based on a low-energy limit featuring lepton flavour triality that has flavour-violating tau decays as the main phenomenological signatures of physics beyond the standard model. These theories have doubly charged scalars as mediators. In this work, we...
BESIII has taken 2.93, 7.33, and 4.5 $fb^{-1}$ of $e^+e^-$ collision data at energies of 3.773, 4.128-4.226, and 4.6-4.7 GeV, collecting the world largest dataset of of $D\bar{D}$, $D_sD_s$, and $\Lambda_c^+\Lambda_c^-$ pairs. On the subject of charmed meson, we will report the updated measurements of $|V_{cs}|$ in $D_s^+ \to \tau^+ \nu$ and the form factor studies in $D_s^+ \to K^+K^- e^+...
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. New measurements from several decay modes are presented, as well as prospects for future sensitivities.
LHCb is playing a crucial role in the study of rare and forbidden decays of charm hadrons, which might reveal effects beyond the Standard Model. We present the latest searches for, and measurements using, rare charm decay processes with two leptons in the final state.
Time-dependent measurements of CP violation are chief goals of the Belle II physics program. Comparison between penguin-dominated $b \to q\bar qs$ and tree-dominated $b \to c \bar cs$ results allows for stringent tests of CKM unitarity that are sensitive to non-SM physics.
This program requires excellent vertexing capabilities. After presenting recent world-leading results on charm-hadron...
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 and to probe the excess rate of semitauonic $B$ decays, which has been consistently above expectations in recent years. Belle II analyses use both exclusive decays such as $B \to D^*\ell \nu$ and $B \to \pi \ell \nu$, or...
Employing the full $BABAR$ dataset, the first two-dimensional unbinned angular analysis of the semileptonic decay $\overline{B}\to D\ell^- \overline{\nu_\ell}$ is performed in both $q^2$ and lepton helicity angle, making use of the hadronic reconstruction of the tag-side $B$ meson. Here $\ell$ stands for an electron or a muon. A novel data-driven signal-background separation procedure with...
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, measurements using new decay channels, and the latest...
Running coupling of QCD results in totally different behavior of the strong interaction in high- and low-energy regions. Experimental measurements in both regions are important test on knowledge of the strong process, and help to understand the QCD backgrounds in New Physics searches using electro-weak processes. The large heavy flavor cross section in proton-proton collisions at the LHC and...
This talk will discuss recent results from the proton-proton collision data taken by the ATLAS experiment on the production of charm andย Bย hadrons and their properties. Measurements ofย J/ฯ, ฯ(2S),ย Ds, andย B+ย differential production cross sections at 13 TeV will be reported. Results on the associated production of theย J/ฯย with other particles will be shown. Measurements of theย B0ย lifetime and...
Recent searches for exotic resonances performed with the Run 2 proton-proton collision data taken by the ATLAS experiment will be presented. This will include studies ofย Zcย andย Zcsย states inย B-meson decays and searches for exotic resonances in 4 muon final states.
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...
Belle II offers unique possibilities for the discovery and interpretation of exotic multiquark states to probe the fundamentals of QCD. This talk presents recent results on searches for the hidden bottom transition between $\Upsilon(10750)$ and $\chi_{bJ}$, and measurements of the energy dependence of the $e^+e^- \to B^{(*)} \bar B ^{(*)}$ cross section.
New physics can manifest itself via lepton-flavour-violating processes in LHC proton-proton collisions. This talk summaries the most recent searches for lepton-flavour-violating processes and tests of lepton flavour universality with the CMS detector, using proton-proton collisions at a centre-of-mass energy of 13 TeV.
Continued attempts to find new physics beyond the standard model remains elusive. In this context, we focus on long standing discrepancies between the theory and experiments, mediated by FCNC $b\to s ll$ quark level transitions. In particular, we consider discrepancies observed by LHCb experiment in BR ($B_s \to \phi ll$), which has deviations at the level of 3.6 $\sigma$. Additionally,...
The Lb --> pK-l+l- decays are governed by the b --> sl+l- quark level transitions. Such decays received significant attention in past decade and over time showed some discrepancies with the Standard model. While analogous meson decays are well studied, Lb baryons received significantly less attention. Phenomenology of Lb FCNC decays is well explored for decays with ground state Lambda baryon...
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,...
Flavour-Changing Neutral-Current processes, such as decays mediated by $b\to s\mu^+\mu^-$ transitions, are forbidden at the lowest perturbative order in the Standard Model (SM) and hence might receive comparatively large corrections from new particles in SM extensions. These corrections may affect different observables related to these decays such as branching fractions or angular...
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...
This talk will cover the most recent results of semileptonic b-hadron decays from the Belle II and LHCb experiments and their implications to potential new physics beyond the standard model.
The recent highlights in charge-parity violation in heavy flavour decays from the LHCb, Belle II and BESIII experiments will be presented. These include updated measurements of sin2beta, Bs meson mixing phase phi_s, CP violation in Bs-->phi phi, CKM angle gamma by LHCb using Run 2 data, combined Belle and Belle II measurement of gamma, new results on sin2beta, Vub and Vcb by Belle II, and...
This talk will provide an overview of recent results related to the production of heavy flavour hadrons at the LHC experiments.
