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
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Bin Wang (IHEP)26/07/2016, 16:50
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Si-Run Xue (Institute of High Energy Physics, Chinese Academy of Sciences)26/07/2016, 17:20During 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...Go to contribution page
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Vadim Baru (Ruhr University Bochum)26/07/2016, 17:50Heavy 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...Go to contribution page
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Miguel Albaladejo (IFIC, Valencia)26/07/2016, 18:20In 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...Go to contribution page
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Robert Pisarski (Nuclear Theory Group, Brookhaven National Laboratory)27/07/2016, 14:15We 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...Go to contribution page
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Valery Lyuboshitz (Joint Institute for Nuclear Research ( Dubna ))27/07/2016, 14:50Spin 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...Go to contribution page
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Dong-Jing Yang (National Taiwan Normal University)27/07/2016, 15:20We 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...Go to contribution page
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Caterina Bloise (INFN)29/07/2016, 14:15The KLOE experiment has collected 2.5 fb-1 at the peak of the phi resonance at the e+e- collider DAPHNE in Frascati. A new beam crossing scheme, allowing for a reduced beam size and increased luminosity, is currently operating at DAPHNE. The upgraded detector, named KLOE-2, has already collected 2.0 fb-1 in these new operating conditions, aiming to reach at least 5 fb-1 in the next two years....Go to contribution page
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Igor Danilkin (Johannes Gutenberg-Universitaet Mainz)29/07/2016, 14:50I 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...Go to contribution page
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Chong-Chung Lih (szmc)29/07/2016, 15:20We study the decay constants ($f_M$) of the Charmful and beautifu vector and tensor mesons in the light front quark model. Here, we tried two different distribution amplitudes to study the decay constants. With the known pseudoscalar meson decay constants of $f_{D}$, $f_{D_{s}}$, $f_{B}$ and $f_{B_{s}}$ as the input parameters to determine the light-front wave functions, we obtain that...Go to contribution page
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Fabian Krinner (Technische Universität München Physik Department E18)29/07/2016, 15:50The 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...Go to contribution page
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Victor Kashevarov (Institut für Kernphysik, Universität Mainz)29/07/2016, 16:50New 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...Go to contribution page
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Abner Soffer (Tel Aviv University)29/07/2016, 16:50We 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...Go to contribution page
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Kenta Itahashi (RIKEN)29/07/2016, 17:20We conducted measurement of excitation spectra in 12C(p,d) reactions near the eta' emission threshold. We employed a 2.5 GeV proton beam accelerated by the synchrotron SIS-18 of GSI impinging on a carbon target. The emitted deuterons at 0 degree were momentum-analyzed by the fragment separator FRS used as a high-resolution spectrometer. We achieved an extremely good statistical sensitivity...Go to contribution page
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Youngjoon Kwon (Yonsei University)29/07/2016, 17:20Belle 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)...Go to contribution page
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Takatsugu Ishikawa (Research Center for Electron Photon Science, Tohoku University)29/07/2016, 17:50A 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....Go to contribution page
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PEDRO FERNANDEZ-SOLER (IFIC - Instituto de Física Corpuscular (CSIC and University of Valencia))29/07/2016, 17:50We 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...Go to contribution page
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Ankita Goswami (Indian Institute of Technology Indore)29/07/2016, 18:20We 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...Go to contribution page
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Zheng Cao (Institute of High Energy Physics, Chinese Academy of Sciences)29/07/2016, 18:20The 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...Go to contribution page