Mr
Miroslav Saur
(University of Chinese Academy of Sciences)
17/08/2019, 14:30
Session 4: Hadron decays, production and interactions
Leading parallel
The LHCb experiment at the LHC is a dedicated heavy flavour experiment studying hadrons containing bottom and charm quarks. During Run I (2010-2012) and Run II (2015-2018) LHCb has collected the world's largest sample of charmed hadrons which enables many studies of Charge-Parity violation (CPV) in the charm system with the highest precision up to this date.
This talk will present current...
Dr
Pei-Rong Li
(Lanzhou University)
17/08/2019, 14:55
Session 4: Hadron decays, production and interactions
Parallel
BESIII has collected data samples corresponding to luminosities of 2.93 fb-1, 3.19 fb-1 and 0.567 fb-1 at center-of-mass energies of 3.773, 4.178, and 4.6 GeV, respectively. The data set collected at 3.773 GeV contains quantum-correlated D0D0bar pairs that allow to access the phase differences between amplitudes. We report the measurements of strong phase differences in D0(-bar) decays, ...
Prof.
Wenbin Qian
(University of Chinese Academy of Sciences)
17/08/2019, 15:15
Session 4: Hadron decays, production and interactions
Parallel
Charmless b decays are CKM suppressed in the Standard Model and the tree amplitudes are comparable with corresponding loop amplitudes. Hence, new particles not foreseen in the SM that appear in the loops may alter observables of these decays. The violation of CP symmetry represents a promising opportunity to search for possible physic beyond the SM. In this talk, we present the most recent...
Ms
Xuesong Liu
(Tsinghua University)
17/08/2019, 15:35
Session 4: Hadron decays, production and interactions
Parallel
Decays of the Bs meson via b ->c cbar s transitions such as Bs0 -> J/psi K K and Bs0 -> J/psi pi pi are sensitive to the CP-violating phase phi_s, which is known with a good precision from global fits based on the Standard Model. Physics beyond the Standard model can affect the Bs0-Bs0bar oscillations or contribute to second-order processes, introducing a sizable shift in phi_s and providing...
Prof.
George W.S. Hou
(National Taiwan University)
17/08/2019, 15:55
Session 4: Hadron decays, production and interactions
Parallel
The LHCb experiment has measured CP violation (CPV) across the Dalitz plot of charmless decays of B mesons to 3 charged tracks, namely in Kππ, KKK, πππ, and πKK final states, with strikingly large CPV and strong variations with Dalitz variables. If one identifies these processes with b → sqq(bar), sss(bar) and b → dqq(bar), dss(bar), where q = u, d, then the “sum rule” that requires two-loop...
Mr
Yue Wang
(USTC)
17/08/2019, 16:45
Session 4: Hadron decays, production and interactions
Leading parallel
BESIII has collected data samples corresponding to luminosities of 2.93 fb-1 and 3.19 fb-1 at center-of-mass energies of 3.773 and 4.178, respectively. We report the measurements of the decays D(s)+ -> l+v (l=mu, tau), D0(+) -> K-bar(pi)l+v (l=e,mu), D0(+) -> K-bar(pi)pie+v, D0(+) -> a0(980)e+v, Ds+ -> eta(')e+v and Ds+ -> K(*)0e+v. From these analyses, the decay constants fD(s)+, the...
Mr
Michal Zamkovsky
(Charles University)
17/08/2019, 17:10
Session 4: Hadron decays, production and interactions
Parallel
The decay K+→π+vv ̅, with a very precisely predicted branching ratio of less than 10-10, is one of the best candidates to reveal indirect effects of new physics at the highest mass scales. The NA62 experiment at the CERN SPS is designed to measure the branching ratio of the K+→π+vv ̅ with a decay-in-flight technique. NA62 took data so far in 2016-2018. Statistics collected in 2016 allowed NA62...
Lianrong Dai
(Liaoning Normal University)
17/08/2019, 17:30
Session 4: Hadron decays, production and interactions
Parallel
First I will present an novel approach on semileptonic decays of meson with charm or beauty flavors. This novel approach was recently developed and we used a different method than in conventional approaches. Using only one experimental decay rate in the B or D sectors, the rates for the rest of decay modes are predicted and they are in good agreement with experiment.
Then an interesting...
Dr
Tomáš Husek
(IFIC (UV-CSIC))
17/08/2019, 17:50
Session 4: Hadron decays, production and interactions
Parallel
Electromagnetic form factors serve to explore the intrinsic structure of nucleons and their strangeness partners. With electron scattering at low energies the electromagnetic moments and radii of nucleons can be deduced. The corresponding experiments for hyperons are limited because of their unstable nature. Only for one process this turns to an advantage: the decay of the neutral Sigma...
Dr
Hee Sok Chung
(Technical University of Munich)
18/08/2019, 14:00
Session 4: Hadron decays, production and interactions
Leading parallel
Heavy quarkonium production processes provide good tests of perturbative and nonperturbative aspects of QCD. We review the status of heavy quarkonium production phenomenology based on effective field theory methods. We give an overview of the nonrelativistic effective field theory treatment of exclusive and inclusive quarkonium production processes.
Tamar Zakareishvili
(Tbilisi SU)
18/08/2019, 14:25
Session 4: Hadron decays, production and interactions
Parallel
The associated production of vector boson with quarkonia is a key observable for understanding the quarkonium production mechanisms, including the separation of single and double parton scattering components. This talk will present the latest measurements from ATLAS on quarkonium production, including associated production.
Dr
Guangrui Liao
(Guangxi Normal University)
18/08/2019, 14:45
Session 4: Hadron decays, production and interactions
Parallel
psi(2S) provides good opportunities for the study of chi_cJ, eta_c, and h_c decays. These studies can be used to verify QCD based models, which provide predictions for the decay mechanism. With the world's largest sample of 4.48*10^8, progress on the charmonium decays has been made. In the talk, we report the new results, such as the first measurement of the branching ratioof chi_c1,2 to mu+...
Shuntaro Sakai
(Institute of Theoretical Physics, CAS)
18/08/2019, 15:05
Session 4: Hadron decays, production and interactions
Parallel
We have made a study of the $J/\psi\rightarrow\eta'h_1$, $\eta h_1$ (with $h_1$ being $h_1 (1170)$ and $h_1 (1380)$), $J/\psi\rightarrow\pi^0 b_1 (1235)^0$ and $\chi_{cJ}\rightarrow \phi h_1(1380)$ assuming the axial vector mesons to be dynamically generated from the pseudoscalar-vector meson interaction.
For the $J/\psi$ decays, we obtain fair agreement with experimental data and provide an...
Xin-Zhen Weng
(Peking University)
18/08/2019, 15:25
Session 4: Hadron decays, production and interactions
Parallel
We study the Okubo-Zweig-Iizuka
(OZI) allowed three body open flavor
decay properties of higher vector charmonium and bottomonium states
with an extended quark pair creation model. For the bottomonium
system, we get that (i) the $BB\pi$ and $B^{\ast}B^{\ast}\pi$ partial decay
widths of the $\Upsilon(10860)$ state are consistent with the
experiment, and the $BB^{\ast}\pi$ partial decay...
David Mack
(TJNAF)
18/08/2019, 16:15
Session 4: Hadron decays, production and interactions
Leading parallel
The GlueX experiment in Hall D at Jefferson Lab consists of a well-instrumented photon beamline in conjunction with a solenoidal spectrometer providing near-hermetic coverage for charged particles and photons. Since 2016, the experiment has had several run periods with a 9 GeV linearly polarized photon beam on a 30cm liquid hydrogen target, completing its initial low-intensity program. Light...
Yuming Ma
(Shandong University)
18/08/2019, 16:40
Session 4: Hadron decays, production and interactions
Parallel
Since the high production rate of light mesons in J/psi decays, the sample of 1.3 billion Jpsi events accumulated at BESIII offer a unique laboratory for investigating light meson decays. Recently many progresses on light meson decays, e.g., eta/etaprime/omega, were achieved at BESIII, including the observation of eta’-> rho+ pi-, precision study of eta’->gamma pi pi decay dynamics and the...
Dr
Alexander Somov
(Jefferson Lab)
18/08/2019, 17:00
Session 4: Hadron decays, production and interactions
Parallel
The GlueX detector in the experimental Hall D at Jefferson Lab
was designed to search for gluonic excitations in the spectra
of light mesons using photon beams. The detector provides a unique
capability to perform a precision measurement of the eta -> gamma gamma
decay width via the Primakoff effect (PrimEx D experiment) and study rare
decays of eta mesons.
Measurement of the eta...
Prof.
Liping Gan
(University of North Carolina Wilmington)
18/08/2019, 17:20
Session 4: Hadron decays, production and interactions
Parallel
As the lightest and the simplest hadronic particle, the neutral pion plays a crucial role in understanding the symmetries of QCD at low-energy. The π0→γγ decay width offers a fundamental test of the QCD predictions based on the chiral anomaly and spontaneous chiral symmetry breaking. The theoretical calculations over the past two decades have reached 1% precision in the decay amplitude of the...
Lukasz Bibrzycki
(P)
18/08/2019, 17:40
Session 4: Hadron decays, production and interactions
Parallel
The study of resonance photoproduction is essential for both fundamental and practical reasons. On the one hand the structure of resonances is directly related to basic properties of QCD like the confinement. On the other hand reliable models are needed to describe the wealth of the resonance photoproduction data to be expected in near future from JLab, ELSA, MAMI, BESIII and SPring-8...
Dr
Lisheng Geng
(Beihang University)
20/08/2019, 08:30
Session 4: Hadron decays, production and interactions
Leading parallel
Over the past twenty years, one has seen remarkable progress in ab initio studies of nuclear structure and reactions with chiral nuclear forces. In a series of recent studies [1-5], we have shown that it is possible to construct chiral nuclear forces using covariant baryon chiral perturbation theory, which enjoy a number of appealing features. For instance, they are manifestly covariant and...
Dr
Xiu-Lei Ren
(Ruhr-University Bochum)
20/08/2019, 08:55
Session 4: Hadron decays, production and interactions
Parallel
We study baryon-baryon scattering by applying time-ordered perturbation theory to the manifestly Lorentz-invariant formulation of chiral perturbation theory. The diagrammatic rules, for the first time, are worked out for the momentum-dependent interactions and propagators of particles with non-zero spin. We define the effective potential as a sum of two-baryon irreducible contributions of...
Johann Zmeskal
(Stefan Meyer Institute for Subatomic Physics)
20/08/2019, 09:15
Session 4: Hadron decays, production and interactions
Parallel
The study of the antikaon-nucleon system at very low energies plays a key role in the understanding of the strong interaction between hadrons in the strangeness sector. The information provided by the low energy kaon-nucleon interaction is accessible through the study of kaonic atoms. The lightest atomic systems, namely the kaonic hydrogen and the kaonic deuterium, provide the isospin...
Gabriela Pérez
(I)
20/08/2019, 09:35
Session 4: Hadron decays, production and interactions
Parallel
The PANDA experiment is one of the pillars of the new Facility for Antiproton and Ion Research (FAIR), currently under construction in Darmstadt, Germany. PANDA stands for antiProton ANnihilation at Darmstadt, and it will be a fixed-target experiment which will allow the study of non-perturbative phenomena of the strong interaction. These will be probed in antiproton-proton collisions in the...
Leonid Kardapoltsev
(Budker Institute of Nuclear Physics)
20/08/2019, 09:55
Session 4: Hadron decays, production and interactions
Parallel
The Spherical Neutral Detector (SND) collect data at the VEPP-2000 $e^+e^-$ collider in Novosibirsk. In this talk we present latest SND results on study of processes of $e^+e^-$ annihilation into exclusive hadronic states at c.m. energy below 2 GeV. In particular, we discuss measurement of the $e^+e^- \to \pi^+\pi^-$ cross section in the c.m. energy 0.52 - 0.88 GeV and the $e^+e^- \to...
Prof.
Fu-Sheng Yu
(Lanzhou University)
20/08/2019, 10:45
Session 4: Hadron decays, production and interactions
Leading parallel
The first observed double-heavy baryon, $\Xi_{cc}^{++}$, was discovered by its weak decays. The discovery channel, $\Xi_{cc}^{++} \to \Lambda_c^+ K^- \pi^+ \pi^+$, and the confirmed mode, $\Xi_{cc}^{++}\to \Xi_c^+\pi^+$, were both predicted in theory by the factorization approach with the rescattering mechanism for the final-state-interaction effect. We will report the recent progress on the...
Ms
Xiao-Hui Hu
(Shanghai Jiao Tong University)
20/08/2019, 11:10
Session 4: Hadron decays, production and interactions
Parallel
The discovery of doubly heavy baryon provides us with a new platform for precisely testing the SM and exploring the new physics. Based on our previous works, we investigate the form factors of the transition $b\to c,u,d,s$ and $c\to d,s$ of double heavy baryons using the light-front quark model. Then we apply the these transition form factors to predict the partial widths for the semi-lepton...
Jorgivan Dias
(University of Sao Paulo)
20/08/2019, 11:30
Session 4: Hadron decays, production and interactions
Parallel
We intend to divide this talk into two parts: in the first one, stimulated by the new experimental LHCb findings associated with the $\Omega_c$ states, some of which we have described in previous work as being dynamically generated through meson-baryon interaction, we have extended this approach to make predictions for new $\Xi_{cc}$ molecular states (in the $C = 2$, $S = 0$ and $I = 1/2$...
Xu Cao
(Institute of Modern Physics, CAS, Lanzhou)
20/08/2019, 11:50
Session 4: Hadron decays, production and interactions
Parallel
We give a parameterizztion of the anomalous line shape of resonances based on a Fano-type formula, which can be widely used to extract properties of resonances from data. We employ it to explain the anomalous line shape of the $e^+ e^- \to D \bar{D}$ and $e^+ e^- \to \Lambda \bar{\Lambda}$. In both reactions, a below-threshold state is found to play significant role in the measured cross sections.
Marcus Petschlies
(Bonn University)
20/08/2019, 14:00
Session 4: Hadron decays, production and interactions
Leading parallel
I report on our study of low-lying resonances in $\pi\pi$ and $K\pi$ scattering from lattice QCD.
Based on ab-initio multi-hadron spectroscopy and the Lüscher finite-volume method, we have
investigated the elastic scattering amplitudes for $\pi\pi$ P-wave, $K\pi$ S-wave
and P-wave partial waves. A particular focus of the discussion will be the parametrizaton of the amplitudes
with respect...
Prof.
Zhi-Hui Guo
(Hebei Normal University)
20/08/2019, 14:25
Session 4: Hadron decays, production and interactions
Parallel
In this talk, I will review our recent developments on the study of using lattice discrete energy levels to determine the resonance properties within the framework of chiral effective field theory. Special attention will be paid to the D*0(2400) in the D-pi, D-eta and Ds-Kbar coupled-channel scattering and the Ds*0(2317) in the DK and Ds-eta scattering.
Dr
Xiao-Yu Guo
(GSI HELMHOLZZENTRUM)
20/08/2019, 14:45
Session 4: Hadron decays, production and interactions
Parallel
We study the dependence of meson masses and decay constants on
the up, down and strange quark masses [1,2,3]. The role of dynamical vector
meson degrees of freedom is scrutinized in terms of an effective chiral
Lagrangian based on the hadrogenesis conjecture. At the
one-loop level, we derive the chiral corrections to the self-energies of
the Goldstone bosons and vector mesons as well as...
Dr
Zhan-Wei Liu
(School of Physical Science and Technology, Lanzhou University)
20/08/2019, 15:05
Session 4: Hadron decays, production and interactions
Parallel
We have studied the interactions between two heavy mesons [D-D or B-B] within heavy meson chiral effective field theory and investigated possible molecular states. The effective potentials are calculated with Weinberg's scheme up to one-loop level. At the leading order, four body contact interactions and one pion exchange contributions are considered. In addition to two pion exchange diagrams,...
Prof.
Eulogio Oset
(IFIC, University of Valencia)
20/08/2019, 15:25
Session 4: Hadron decays, production and interactions
Parallel
We have addressed the study of non-leptonic weak decays of heavy hadrons (Λ _b, Λ _c, B and D), with external and internal emission to give two final hadrons, taking into account the spin-angular momentum structure of the mesons and baryons produced. A detailed angular momentum formulation is developed which leads to easy final formulas. By means of them we have made predictions for a large...
