We consider theoretical frameworks used in charm physics.
First, we briefly review the approaches and results of the Standard Model used in the
processes with the charm quark.
Then we discuss possibilities to search for a theory behind the Standard Model.
The talk will set the scene for the experimental reports of the programme. The various scientific topics will be mapped out with brief individual introductions touching on the respective main features. A zoomed-out view will (attempt to) arrange the pieces into an overall picture, spanning the past, present and future. Experimental methods will be examined through the lens of their advantages,...
We will review the latest theoretical predictions of charmed meson and baryon lifetimes and will summarize the status of D-Dbar mixing in the Standard Model.
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...
LHCb has collected the world's largest sample of charmed hadrons. This sample is used to measure $D^0 -\overline{D}^0$ mixing, search for $C\!P$ violation in mixing and interference and measurements of charm-baryon lifetimes. New measurements from several decay modes are presented, as well as prospects for future sensitivities.
Spectroscopy studies on the lattice can provide valuable
insights through the investigation of states that are not well established experimentally, through the prediction of new states and by testing theoretical descriptions. The internal structure of these states can, in principle, be probed by determining their decay constants, form factors and so on. Mesons and baryons containing heavy...
Charmed meson and baryon spectroscopy gives insight into QCD at low energies from a unique perspective. Recently, the discovery of many previously unobserved charmed states and precise measurements of their properties have been made. This talk reports the latest work on the spectroscopy of charmed hadrons at LHCb and other key experiments in the field.
Precise measurements of the lepton properties provide stringent tests of the Standard Model. The large mass of the tau makes also possible to perform accurate QCD studies and search for violations of lepton flavour in many kinematically-allowed decay modes. The present status of tau physics and the prospects for future improvements will be discussed.
The proposed STCF is a symmetric electron-positron beam collider designed to provide e+e− interactions at a centerof-mass energy from 2.0 to 7.0 GeV. The peaking luminosity is expected to be 0.5×10^35 cm−2s−1. STCF is expected to deliver more than 1 ab−1 of integrated luminosity per year. The huge samples could be used to make precision measurements of the properties of XYZ particles; search...
A nonperturbative charm production contribution, known as intrinsic charm, has been speculated since the 1980s. While it has yet to be satisfactorily proven, there have been recent tantalizing hints. Several experiments, either taking data or planned, could proivde definitive evidence in the next few years. Recent experiments that have taken $J/\psi$ and $D$ meson data include SeaQuest at...
The J\$\psi$ meson, discovered simultaneously in 1974 at Brookhaven National Laboratory and the Stanford Linear Accelerator, remains a focus of great interest today to physicists worldwide. J/$\psi$ analyses are published regularly in heavy-ion physics that range from elliptic flow in $p$A and AA collisions to ratios of J/$\psi$ and its excited state the $\psi$(2S), as well as...
The theoretical description for charm decays is notoriously challenging. In this respect, semi-leptonic decays are excellent probes as they are at least easier to describe than their nonleptonic counterparts. In this talk, I will focus on inclusive semi-leptonic charm decays. For these decays, one may hope that the heavy-quark expansion, a well-established tool in beauty decays, works to some...
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. This talk presents the latest searches for and measurements using rare charm decay processes with leptons in the final state.
In this review talk, I will present the status of lattice calculations of semileptonic decays of charmed hadrons. I will review results from different collaborations and discuss how they lead to quantities of phenomenological relevance, including decay rates, CKM matrix elements, and lepton flavor universality ratios.
In this report, I mainly overview the recent selected leptonic and semileptonic decays of charmed hadrons including D0, D+, Ds and L_c(L=Lambda), based on data samples collected by BESIII detector corresponding to luminosities of 2.93 fb-1, 7.33 fb-1 and 4.5 fb-1 above the threshold of DDbar, DsDs* and LcLcbar, respectively. By measuring the branching fractions , form factors and CKM matrix...
Direct CP violation in the charm sector
LHCb has collected the world's largest sample of charm hadrons. This sample is used to measure direct $C\!P$ violation in $D$ mesons and charm baryons. The latest measurements from several decay modes are presented, as well as prospects for future sensitivities.
For charmed mesons, this presentation will report the recent amplitude analyses of Cabibbo-favored and -suppressed Ds decays by BESIII, including the observation of a new a0-like state at 1.817 GeV, the branching fraction measurements of D meson doubly Cabibbo-suppressed decay and decays involving KL0. In addition, LHCb recently performed many measurements of CP violation/asymmetry and...
Everything, everywhere, all at once.
