-
Prof. Alexander Lenz (Siegen University)17/07/2023, 10:45
-
Svjetlana Fajfer (University of Ljubljana and J.Stefan Institute)17/07/2023, 11:00invited plenary talk
We consider theoretical frameworks used in charm physics.
Go to contribution page
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. -
Tara Nanut Petric (CERN)17/07/2023, 11:45invited plenary talk
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,...
Go to contribution page -
Roberto Di Palma (Roma Tre University)17/07/2023, 14:00
In the last few years, $D^0 - \overline{D^0}$ mixing has become a true benchmark for the Standard Model thanks to the precision reached by modern experiments. Charm mixing may reveal signals of heavy New Physics since it happens through Flavour Changing Neutral Currents, which are absent at the tree level and GIM-suppressed at the loop level in the Standard Model.
Go to contribution page
The most promising... -
Dominik Suelmann (TU Dortmund)17/07/2023, 14:00
We study rare charm decays with missing energy to probe light degrees of freedom.
Go to contribution page
Specifically, we investigate axion-like particles and light $Z^\prime$ bosons with dark fermions.
We also consider EFT models with light neutrinos of both chiralities.
Observables of both charm mesons and baryons are examined to assess their sensitivity and potential to probe NP.
We find that the missing... -
Felix Erben (University of Edinburgh)17/07/2023, 14:20
The mixing of neutral $D$ mesons is the least understood of all neutral meson mixing processes. Both in experiment and theory, the mixing of $K, B, B_s$ mesons is known to a much higher precision. In this talk I will present results of a lattice calculation on the short-distance contribution to $D$-meson mixing, whose matrix elements are important inputs for various models beyond the Standard...
Go to contribution page -
Saskia Plura (Johannes Gutenberg-Universität Mainz, Institut für Kernphysik)17/07/2023, 14:20
The BESIII experiment is a symmetric e+e- collider operating at c.m. energy from 2.0 to 4.95 GeV. With the world’s largest data set of J/psi (10 Billion), psi(2S) (2.6 Billion), and about 25 fb-1 scan data from 3.77 to 4.95 GeV, we are able to search various dark sectors produced in e+e- annihilation and meson decay processes. In this talk, we report the search for dark photon candidate in...
Go to contribution page -
Hai Yang Cheng (Academia Sinica)17/07/2023, 14:40
We study the inclusive decay widths of the singly heavy baryon using the improved bag model in which the unwanted center-of-mass motion is removed. We discuss the running of the baryon matrix elements and compare the results with the non-relativistic quark model (NRQM). We find that while the numerical values of two-quark operator elements are compatible with the literature, those of the...
Go to contribution page -
Marco Gersabeck17/07/2023, 14:40
Currently, it is not clear whether the observed level of CP violation in the charm system can be accommodated within the SM, and further measurements are needed. Multi-body charm decays are powerful tools to search for CP violation through interference of intermediate resonances which may lead to local asymmetries in the phase space. LHCb is successfully exploring model-independent approaches...
Go to contribution page -
TIANZI SONG (Sun Yat-sen University)17/07/2023, 15:00
The BESIII experiment has collected 2.6B psi(2S) events and 10B J/psi events. The huge data sample provide an excellent chance to search for rare processes in charmonium and charm meson decays. In this talk, we report the recent search for J/psi->D^-e+nu_e, psi(2S)->Lambda_c anti-Sigma^-. In addition, LFV process J/psi->e tau/e mu & BNV/LNV process D^0->p e/n e, and the FCNC process D^0 ->...
Go to contribution page -
Longke Li (Univ. of Cincinnati)17/07/2023, 15:00
$CP$ violation in charm decays is predicted to be very small, only $\sim\!10^{-3}$ or less. Thus, observing significant $CP$ violation could indicate new physics beyond the Standard Model. The Belle experiment has searched for $CP$ violation in charm decays by measuring an asymmetry about zero for the $T$-odd triple product $\vec{p}^{}_1\cdot (\vec{p}^{}_2\times \vec{p}^{}_3)$, where...
Go to contribution page -
Arman Korajac (Jožef Stefan Institute)17/07/2023, 15:20
We present constraints on the left-handed dimension-6 interactions that contribute to semileptonic and leptonic decays of $K$, $D$, pions and to nuclear beta decay. We employ the flavour covariant description of the effective couplings, identify universal CP phases of New Physics and derive constraints from decay rates and CP-odd quantities. As a result, we can predict the maximal effects of...
Go to contribution page -
Luiz Vale Silva (IFIC, UV-CSIC)17/07/2023, 15:20
The Kobayashi-Maskawa (KM) mechanism predicts that a single parameter must be responsible for CP-violating phenomena in different quark flavour sectors of the Standard Model (SM). Despite this minimal picture, challenged by non-SM physics, the KM mechanism has been so far verified in the bottom and strange sectors, but lacks tests in the complementary charm sector. For the sake of this, urgent...
Go to contribution page -
Yasemin Schelhaas (JGU Mainz)17/07/2023, 15:40
At BESIII, the R value is measured with a total of 14 data points with the corresponding c.m. energy going from 2.2324 to 3.6710 GeV.
Go to contribution page
The statistical uncertainty of the measured R is less than 0.6%. Two different simulation models, the LUARLW and a new Hybrid generated, are used and give consistent detection efficiencies and initial-state-radiation corrections. An accuracy of better than 2.6%... -
Prof. Blazenka Melic (Rudjer Boskovic Institute Zagreb)17/07/2023, 16:30invited plenary talk
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.
Go to contribution page -
Alan Schwartz (University of Cincinnati)17/07/2023, 17:00invited plenary talk
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...
Go to contribution page -
Adam Davis17/07/2023, 17:30invited plenary talk
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.
Go to contribution page -
Antonio Polosa18/07/2023, 09:00invited plenary talk
-
Chunhua Li18/07/2023, 09:45invited plenary talk
-
Dr Sara Collins (University of Regensburg)18/07/2023, 11:00invited plenary talk
Spectroscopy studies on the lattice can provide valuable
Go to contribution page
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... -
Patrick Spradlin18/07/2023, 11:45invited plenary talk
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.
Go to contribution page -
Han Gao18/07/2023, 14:00
BESIII has collected 2.93 and 7.33 fb$^{-1}$ of $e^+e^-$ collision data samples at 3.773 and 4.128-4.226 GeV, which provide the largest dataset of $DD^-$ and $D_s D_s$ pairs in the world, respectively.
Go to contribution page
In this talk, we will report the updated measurements of $|V_{cs}|$ in $D^+_s\to \tau^+\nu$ and the form factor studies in $D^+_s\to K^+K^- e^+\nu$ and $\pi^+\pi^-e^+\nu$. In addition, we will... -
Juan Andres Urrea Nino (Bergische Universität Wuppertal)18/07/2023, 14:00
A recently proposed modification to the widely used distillation framework yields a substantial improvement in the calculation of the spectrum of charmonium with different $J^{PC}$ at almost no additional computational cost compared to the standard distillation framework. This improved variant is now used to calculate the charmonium spectrum in an $N_f = 3 + 1$ ensemble at the SU(3) light...
Go to contribution page -
Hang Zhou (Shandong University)18/07/2023, 14:20
In recent years, BESIII has accumulated tens of 1/fb electron-positron colliding data samples at cms energies from 4 to 5 GeV. Cross-section measurements are performed with specific final states to search for vector charmonium(-like) states. I shall present three corresponding recent results in this talk. It includes: 1) cross-sections of e+ e- -> Ks Ks J/psi from 4.13 to 4.95 GeV, in which...
Go to contribution page -
Brian Colquhoun (University of Glasgow)18/07/2023, 14:20
We present results from our calculation of decays rates for $\eta_c\to\gamma\gamma$, $J/\psi\to\gamma\eta_c$ and $J/\psi\to\eta_c e^+e^-$ in lattice QCD with the effect of u, d, s and c quarks in the sea for the first time. We use the Highly Improved Staggered Quark formulism, four values of the lattice spacing and sea u/d quarks down to their physical values. Our results are accurate at the...
Go to contribution page -
Eleftheria Solomonidi (IFIC-University of Valencia/CSIC)18/07/2023, 14:40
Rare charmed meson decays are a promising canvas for New Physics signatures to appear, being by definition very suppressed in the SM and since previous studies have identified observables that are free from SM contributions. In light of the extended amount of recently released LHCb data, a better control over the SM dynamics is imperative for a comparison to the experimental observables and...
Go to contribution page -
Andrzej Kupsc (Uppsala University)18/07/2023, 14:40
A baryon-antibaryon pair from electron-positron annihilation is a simple spin entangled system that can be used for studies of time-like electromagnetic form factors, baryon decays and test of discrete symmetries.
Go to contribution page
A modular approach [Phys.Rev.D 99 (2019) 056008] where the complete angular distributions in such processes are conveniently obtained using products of real-valued matrices... -
Sungtae Cho (Kangwon National University)18/07/2023, 15:00
We study charmonia in heavy ion collisions by focusing on the production of charmonium states from charm and anti-charm quarks in a quark-gluon plasma by recombination. Starting from the investigation on the internal structure, or the wave function of charmonium states we discuss the yield and transverse momentum distributions of charmonium states produced in heavy ion collisions. We argue...
Go to contribution page -
Bachir Moussallam (IJCLab,Université Paris-Saclay)18/07/2023, 15:00
We discuss some applications of isospin symmetry in the
Go to contribution page
Cabibbo favoured $D\to\bar{K}\pi\pi$ decays. These processes are important for
precision testing of the Standard Model and for hadronic physics. Combining
isospin symmetry with a dispersive reconstruction theorem we derive a
representation in terms of one-variable functions which allows one to predict
all the $D\to\bar{K}\pi\pi$... -
Xiangpeng Wang (Technische Universität München)18/07/2023, 15:20
Under some assumptions on the hierarchy of relevant energy scales, we compute the nonrelativistic QCD (NRQCD) long-distance matrix elements (LDMEs) for inclusive production of J/ψ, ψ(2S), and Υ states based on the potential NRQCD (pNRQCD) effective field theory. Based on the pNRQCD formalism, we obtain expressions for the LDMEs in terms of the quarkonium wavefunctions at the origin and...
Go to contribution page -
Zhi-zhong Xing (Institute of High Energy Physics, and University of Chinese Academy of Sciences)18/07/2023, 15:20
We study the effects of $D^0$-$\bar{D}^0$ mixing and CP violation in $D^0 \to K^{*\pm} K^{\mp}$ decays and their CP-conjugated processes. We find that both the $D^0$-$\bar{D}^0$ mixing parameters and the strong-interaction phase difference between $\bar{D}^0 \to K^{*\pm}K^{\mp}$ and $D^0 \to K^{*\pm}K^{\mp}$ transitions can be determined from the time-dependent measurements of these decay...
Go to contribution page -
Jonas Rademacker (University of Bristol)18/07/2023, 15:40
We present a novel unbinned method to combine B --> DK and charm threshold data for the amplitude-model unbiased measurement of the CKM angle gamma in cases where the D meson decays to a three-body final state. The new unbinned approach avoids any kind of integration over the D Dalitz plot, to make optimal use the available information. We verify the method with simulated signal data where the...
Go to contribution page -
Antonio Pich (IFIC, Univ. Valencia - CSIC)19/07/2023, 09:00invited plenary talk
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.
Go to contribution page -
Prof. Yangheng Zheng (University of Chinese Academy of Science (UCAS))19/07/2023, 09:45
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...
Go to contribution page -
Ramona Vogt (LLNL and UC Davis)19/07/2023, 11:00invited plenary talk
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...
Go to contribution page -
Krista Smith (Los Alamos National Laboratory)19/07/2023, 11:45invited plenary talk
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...
Go to contribution page -
Keri Vos (Maastricht University)20/07/2023, 09:00invited plenary talk
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...
Go to contribution page -
Daniel Unverzagt20/07/2023, 09:45invited plenary talk
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.
Go to contribution page -
William Jay (MIT)20/07/2023, 11:00invited plenary talk
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.
Go to contribution page -
Dr Shulei Zhang (Hunan University)20/07/2023, 11:45invited plenary talk
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...
Go to contribution page -
Mr Dmytro Meleshko (Uni. Giessen)20/07/2023, 14:00
The analyses of states with double cs content and the search for exotics have recently gained much attention. The Belle experiment collected roughly 1 ab-1 integrated luminosity data. While Belle II data-taking is in progress, we have performed a new search for exotic states and cross-section measurements with the full Belle data sets. Here we review the recent analysis of:
Go to contribution page
a) ... -
Anshika Bansal (Physical Research Laboratory, Ahmedabad)20/07/2023, 14:00
The distribution amplitudes (DAs) are the universal non-perturbative elements that enter the description of processes involving strong interactions in frameworks like light cone sum rules (LCSR). For light quark systems, they are formulated using the properties of conformal symmetry. However, for heavy quark systems, one faces different challenges. The most important quantities of interest for...
Go to contribution page -
Hee Sok Chung (Korea University)20/07/2023, 14:20
We investigate the renormalization properties of the shape function formalism for inclusive production of $P$-wave heavy quarkonia, which arises from resumming a class of corrections coming from kinematical effects associated with the motion of the heavy quark and antiquark pair relative to the quarkonium. Such kinematical effects are encoded in the nonperturbative shape functions, which are...
Go to contribution page -
Zhiyong Wang20/07/2023, 14:20
n this talk, four recent measurements of chi_cJ or psi decays at BESIII will be presented. In contains: 1) Using 448 million psi(3686) events collected with the BESIII detector, the process psi(2S) -> phi Ks Ks has been observed for the first time, and the branching fraction is determined; 2) Using the same data sample, the branching fractions of the decays chi_cJ -> phi phi (J=0,1,2) have...
Go to contribution page -
Dr Shan Cheng (Hunan University, China)20/07/2023, 14:40
In this presentation i will first talk about the recent QCD LCSRs calculation of $D_s^\ast \to \phi$ helicity form factors and discuss the experiment potential of discovering exclusive $D_s^\ast$ weak decays, then i will discuss the width effect in the $D_s \to f_0 (\to \pi^+\pi^-) l\nu$ decay.
Go to contribution page -
Tomasz Korzec (Bergische Universität Wuppertal)20/07/2023, 14:40
Spectroscopy in the iso-scalar channels that contain charmonia, glueballs, light mesons and multi-particle states, poses a big challenge for lattice QCD calculations. One of the reasons is the presence of notoriously noisy and expensive quark-disconnected contributions to the correlation functions. We present modern techniques, based on "distillation", which allow us to investigate the...
Go to contribution page -
Liping He (Universität Bonn)20/07/2023, 15:00
We study the time evolution of the number of charm mesons after the kinetic freeze-out of the hadron gas produced by a central heavy-ion collision. The $\pi D^*\to \pi D^*$ reaction rates have t-channel singularities that give contributions inversely proportional to the thermal width of the $D$. The ratio of the $𝐷^0$ and $𝐷^+$ production rate can differ significantly from those predicted...
Go to contribution page -
Alexander Khodjamirian20/07/2023, 15:00
The light-cone distribution amplitudes of two-pion states are universal hadronic objects involved in the factorization of heavy hadron decays or in the large momentum-transfer transitions with two pions in the final state. The leading twist-2 distribution amplitudes are parameterized in terms of the functions of the dipion invariant mass serving as coefficients in the Gegenbauer expansion....
Go to contribution page -
Roman Höllwieser (University of Wuppertal)20/07/2023, 15:20
We study charmonium and glueballs on $N_f=3+1$ lattice ensembles using distillation as a smearing for the quark fields. The novelty of our study is the inclusion of light hadrons into which these states can decay. We present preliminary results for the hyperfine splitting of the low-lying charmonium states by including disconnected diagrams together with light flavor mixing.
Go to contribution page -
Linjian Li20/07/2023, 15:20
Using the world’s largest samples of J/psi and psi(3686) events produced in e+e- annihilation, BESIII is uniquely positioned to study light hadrons in radiative and hadronic charmonium decays. In particular, exotic hadron candidates including multiquark states, hybrid mesons and glueballs can be studied in high detail. Recent highlights on the light exotics searches, including the observation...
Go to contribution page -
Pablo García Ortega (Universidad de Salamanca)20/07/2023, 15:40
The LHCb collaboration announced in 2021 the discovery of a new tetraquark-like state, named $T_{cc}^+$. The $T_{cc}^+$ is reminiscent of the $X(3872)$, which is a candidate for a loosely-bound $D\bar D^*$+h.c. molecule; however, we are now dealing with an open-charmed state which radically changes its nature and makes it explicitly exotic. In this talk, the recently discovered $T_{cc}^+$ is...
Go to contribution page -
Satoshi Nakamura (Shandong University)20/07/2023, 15:40
The recent BESIII data on $J/\psi\to\gamma(K_SK_S\pi^0)$, which is significantly more precise than earlier $\eta(1405/1475)$-related data, enables quantitative discussions on $\eta(1405/1475)$ at the previously unreachable level. We conduct a three-body unitary coupled-channel analysis of experimental Monte-Carlo outputs for radiative $J/\psi$ decays via $\eta(1405/1475)$: $K_SK_S\pi^0$ Dalitz...
Go to contribution page -
Fanrong Xu (Jinan University)20/07/2023, 16:30
In 2022, doubly charmed baryon hadronic weak decay Ξ_cc^{++}→Ξ_c^('+) π^+ was first observed by LHCb and its branching fraction relative to Ξ_cc^{++}→Ξ_c+ π+ was reported. In this talk we will introduce the study of charmed baryon decays Ξ_cc^{++}→Ξ_c^('+) π^+ within the framework of the nonrelativistic quark model (NRQM). Factorizable amplitudes in terms of transition form factors, while...
Go to contribution page -
Dr Marko Staric (Joseph Stephan Institute, Slovenia)20/07/2023, 16:30
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. Measurements of CP violation and mixing play a key role in this program. We present a novel algorithm that identifies the flavor of neutral charm mesons at the time of production. This algorithm effectively doubles the sample...
Go to contribution page -
Yingchao Xu20/07/2023, 16:50
BESIII has collected 4.5 fb^-1 of e+e- collision data between 4.6 and 4.7 GeV. This unique data offers ideal opportunities to study Lambda_c+ decays. We will report the partial wave analysis of Lambda_c+ -> Lambda pi+ pi0 and the observations of Cabibbo-suppressed Decays Lambda_c+ decays, including Λ+c → nπ+ etc. In addition, we will report the form factor measurement in Lambda_c+ -> Lambda e+...
Go to contribution page -
Giulia Tuci20/07/2023, 16:50
LHCb has played a major role in charm physics over the last years analysing data recorded during Run I and Run II. Recently, the LHCb detector has undergone a series of major upgrades. This talk will include the first performance results from the new LHCb detector in Run III and a brief look into the future charm physics program of the collaboration.
Go to contribution page -
Hai Yang Cheng (Academia Sinica)20/07/2023, 17:10
Three decades ago, heavy-flavor-conserving (HFC) weak decays of heavy baryons such as $\Xi_Q\to\Lambda_Q\pi$ and $\Omega_Q\to\Xi_Q\pi$ for $Q=c,b$ had been studied
Go to contribution page
within the framework that incorporates both heavy-quark and chiral symmetries.
HFC decays have two great advantages: (1) S-wave can be evaluated reliably using current algebra, and (2) if the heavy quark in the HFC process behaves... -
Fu-Sheng Yu (Lanzhou University)21/07/2023, 09:00invited plenary talk
Direct CP violation in the charm sector
Go to contribution page -
Evelina Gersabeck (University of Manchester)21/07/2023, 09:45invited plenary talk
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.
Go to contribution page -
Bai-Cian Ke (Zhengzhou University)21/07/2023, 11:00invited plenary talk
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...
Go to contribution page -
Guy Wilkinson21/07/2023, 11:45invited plenary talk
-
Maxwell Hansen21/07/2023, 14:00invited plenary talk
-
Jonas Rademacker (University of Bristol)21/07/2023, 14:45invited plenary talk
Everything, everywhere, all at once.
Go to contribution page -
invited plenary talk
Choose timezone
Your profile timezone: