Conveners
Mesons: B-2 / 26-M-1
- Sachiko Takeuchi
Mesons: C-3 / 27-M-2
- Shin-Nan Yang
Mesons: D-2 / 29-M-3
- Harleen Dahiya
Mesons: E-3 / 29-M-5
- Yuji Kato
Mesons: E-2 / 29-M-4
- Pawel Moskal
Si-Run Xue
(Institute of High Energy Physics, Chinese Academy of Sciences)
26/07/2016, 17:20
During the past decade, a large number of the so-called $X$, $Y$, $Z$ states have been observed in the heavy flavor sector, as have become candidates for exotic hadrons which may contain more complicated quark-gluon structures than the conventional quark model picture. Among all those exotic candidates, the $Y(4260)$ is undoubtedly one of the most mysterious states and has initiated a lot of...
Vadim Baru
(Ruhr University Bochum)
26/07/2016, 17:50
Heavy quark spin symmetry (HQSS) partners of the X(3872) 1++ molecule are discussed in a coupled-channel approach with non-perturbative pions. In the strict heavy-quark limit the 1++ molecular state has three degenerate partner states with the 1+-, 0++ and 2++ quantum numbers. In the presence of pions this result is shown to be correct only if all allowed coupled-channel transitions...
Miguel Albaladejo
(IFIC, Valencia)
26/07/2016, 18:20
In this talk we report on two recent works about the Zc(3900) resonance. A coupled channel T-matrix is used in the description of the D*D and J/\psi\pi spectra in which the Zc(3900) peak has been seen. The data can be well reproduced in two different scenarios, in which the Zc(3900) is a resonance or a virtual state. We also put this coupled channel T-matrix in a finite box, with the aim of...
Robert Pisarski
(Nuclear Theory Group, Brookhaven National Laboratory)
27/07/2016, 14:15
We consider how tetraquarks can affect the chiral phase transition for light quarks coupled to SU(3) color. For two flavors the tetraquark field is an isosinglet, and its effect is minimal. For three flavors, however, the tetraquark field transforms in the same representation of chiral symmetry as the usual chiral order parameter, and so for very light quarks there may be {\it two} chiral...
Valery Lyuboshitz
(Joint Institute for Nuclear Research ( Dubna ))
27/07/2016, 14:50
Spin correlations for the $\Lambda \Lambda$ and $\Lambda \bar{\Lambda}$ pairs, generated in relativistic heavy-ion collisions, and related angular correlations at the joint registration of space-parity nonconserving hadronic decays of two hyperons are theoretically analyzed. These correlations give important information about the character and mechanism of multiple processes, and the advantage...
Dong-Jing Yang
(National Taiwan Normal University)
27/07/2016, 15:20
We derive gluon fragmentation functions in the Nambu-Jona-Lasinio (NJL) model by approximating a gluon as a fictitious color-octet quark-anti-quark ($q\bar q$) pair. Gluon elementary fragmentation functions are derived from the quark and anti-quark elementary fragmentation functions for emitting specific mesons in the NJL model under the requirement that the $q\bar q$ pair maintains in the...
Igor Danilkin
(Johannes Gutenberg-Universitaet Mainz)
29/07/2016, 14:50
I will focus my talk on our recent studies of three-body final state interactions [*]. We considered the decays eta/ω/φ → 3π in the dispersive frameworks that are based on the main constraints of the S-matrix theory, namely unitarity, analyticity, and crossing symmetry. Our results indicated that the final state interactions may be sizable. In my talk, the Dalitz plot distributions and...
Fabian Krinner
(Technische Universität München Physik Department E18)
29/07/2016, 15:50
The COMPASS experiment at CERN has collected a very large data set of 50 million diffractively produced $\pi^-\pi^+\pi^-$ events using a $190\,$GeV$/c$ negatively charged hadron beam. The partial-wave analysis (PWA) of these high-precision data reveals previously unseen details. The PWA, which is currently limited by systematic uncertainties, is based on the isobar model, in which...
Victor Kashevarov
(Institut für Kernphysik, Universität Mainz)
29/07/2016, 16:50
New high-precision total and differential cross sections for $\eta$ and $\eta'$ photoproduction on the proton obtained by the A2 Collaboration at the Mainz Microtron are presented. The total cross section for $\eta$ photoproduction demonstrates a cusp at the energy W$\sim$1.9~GeV. Furthermore, we present a new version of the $\eta$MAID model for $\eta$ and $\eta'$ photoproduction. The model...
Abner Soffer
(Tel Aviv University)
29/07/2016, 16:50
We study the reaction e+ e− -> gamma_ISR J/psi, where J/psi -> pi+ pi- pi0, J/psi -> K+ K- pi0, and KS K+ pi- using events obtained from the Initial State Radiation process. We measure the relative J/psi branching fraction and perform a Dalitz plot analysis of both J/psi decay modes using an isobar and a Veneziano model. We present also an analysis of the process gamma gamma -> K anti-K pi. We...
Youngjoon Kwon
(Yonsei University)
29/07/2016, 17:20
Belle experiment at KEKB $e^+e^-$ collider accumulated data at the energy points around $¥Upsilon(10860)$ and $¥Upsilon(11020)$ as well as at $¥Upsilon(nS)$ $(n=1,2,3)$ resonances. These datasets provide an ideal place to perform bottomonium spectroscopy and search for exotic hadron states in bottomonia decays. In this talk, recent Belle results in the spectroscopy of bottomonium(-like)...
Takatsugu Ishikawa
(Research Center for Electron Photon Science, Tohoku University)
29/07/2016, 17:50
A new $\eta$ photoproduction experiment is planned for the determination of the $\eta$-$n$ low-energy scattering parameters at the Research Center for Electron Photon Science (ELPH), Tohoku University. The emitted proton is measured at 0 degrees for the $\gamma d\to p eta n$ reaction at $E_\gamma \sim 0.9$ GeV, which gives the zero relative momentum between the $\eta$ meson and the neutron....
PEDRO FERNANDEZ-SOLER
(IFIC - Instituto de Física Corpuscular (CSIC and University of Valencia))
29/07/2016, 17:50
We study the presence of the the D*s0(2317) resonance in the weak decay process: Bc->J/psi KD. We assume a weak interaction mechanism in which the b quark decays into a c anti-c (J/psi) and anti-s via a W meson. In this process the c anti-s pair hadronizes and the possible final configurations considered are KD and eta Ds. We compute the interaction of these two meson channels in the chiral...
Ankita Goswami
(Indian Institute of Technology Indore)
29/07/2016, 18:20
We present a study of the Dalitz decay η → γe + e − . The aim is to determine the transition form factor of the η meson. The transition form factor describes the electromagnetic structure of the meson. The transition form factor is determined by comparing the experimental e + e − invariant mass distribution with QED. The analysis uses proton-proton reaction at 1.4 GeV.The data has been...
Zheng Cao
(Institute of High Energy Physics, Chinese Academy of Sciences)
29/07/2016, 18:20
The E1 transitions of ψ(3686) and ψ(3770) → γχ_cJ are investigated in a non-relativistic effective field theory (NREFT) where the open charm effects are included systematically as the leading corrections. It also allows a self-consistent inclusion of the S-D mixing in the same framework. It shows that the open charm contributions are essential for understanding the significant deviations of...
