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Issues and Opportunities in Exotic Hadrons

Chinese Physics C 2016年第4期40卷 8-21页

作者： R.A.Briceno T.D.Cohen s.coito J.J.Dudek E.Eichten C.s.Fischer M.Fritsch W.Gradl A.Jackura M.Kornicer G.Krein R.F.Lebed F.A.Machado R.E.Mitchell C.J.Morningstar M.Peardon M.R.Pennington K.Peters J.M.Richard C.P.shen M.R.shepherd T.skwarnicki E.s.swanson A.P.szczepaniak C.Z.Yuan Thomas Jefferson National Accelerator Facility 12000 Jefferson Avenue Newport News VA 23606 USA Department of Physics Old Dominion University Norfolk VA 23529 USA Maryland Center for Fundamental Physics University of Maryland College Park MD USA Institute of Modern Physics CAS Lanzhou 730000 China Theoretical Physics Department Fermilab IL 60510 USA Institut fut Theoretische Physik Justus-Liebig-Universitat Gieben Heinrich-Buff-Ring 16 D-35392 GieBen Germany Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany Physics Department Indiana University Bloomington IN 47405 USA University of Hawaii Honolulu Hawaii 96822 USA Instituto de Física Teorica Universidade Estadual Paulista Rua Dr. Bento Teobaldo Ferraz 271 - Bloco II 01140-070 Sgo Paulo SP Brazil Department of Physics Arizona State University Tempe Arizona 85287-1504 USA Department of Physics and Astronomy University of Pittsburgh Pittsburgh PA 15260 USA Indiana University Bloomington Indiana 47405 USA Department of Physics Carnegie Mellon University Pittsburgh PA 15213 USA school of Mathematics Trinity College Dublin 2 Ireland GsI Helmholtzcentre for Heavy Ion Research GmbH D-64291 Darmstadt Germany Universite de Lyon Institut de Physique Nucleaire de Lyon IN2P3-CNRS-UCBL 4 rue Enrico Fermi Villeurbanne France Beihang University Beijing 100191 China syracuse University Syracuse NY USA Theory Center Thomas Jefferson National Accelerator Facility 12000 Jefferson Avenue Newport News VA 23606 USA Center for Exploration of Energy and Matter Indiana University Bloomington IN 47403 USA Institute of High Energy Physics Beijing 100049 China

The last few years have been witness to a proliferation of new results concerning heavy exotic ***, many new signals have been discovered that could be pointing towards the existence of tetraquarks,pentaquarks, and other exotic configurations of quarks and gluons. Theoretically, advances in lattice field theory techniques place us at the cusp of understanding complex coupled-channel phenomena, modelling grows more sophisticated, and effective field theories are being applied to an ever greater range of situations. It is thus an opportune time to evaluate the status of the field. In the following, a series of high priority experimental and theoretical issues concerning heavy exotic hadrons is presented.

关键词： quark meson exotic flavor pointing charm Belle sophisticated hadron situations

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Issues and Opportunities in Exotic Hadrons

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Chinese Physics C 2016年第4期 14-27页

作者： R.A.Briceo T.D.Cohen s.coito J.J.Dudek E.Eichten C.s.Fischer M.Fritsch W.Gradl A.Jackura M.Kornicer G.Krein R.F.Lebed F.A.Machado R.E.Mitchell C.J.Morningstar M.Peardon M.R.Pennington K.Peters J.M.Richard C.P.shen M.R.shepherd T.skwarnicki E.s.swanson A.P.szczepaniak C.Z.Yuan Thomas Jefferson National Accelerator Facility Department of Physics Old Dominion University Maryland Center for Fundamental Physics University of Maryland Institute of Modern Physics CAS

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Using X（3823）→J/ψπ＋π- to identify coupled-channel effects

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Frontiers of physics 2016年第3期11卷 151-159页

作者： Bo Wang Hao Xu Xiartg Liu Dian-Yong Chen susana coito Estia Eichten Research Center for Hadron and CsR Phys~ics Lanzhou University and Institute of Modern Physics of CAS Lanzhou 730000 China school of Physical science and Technology Lanzhou University Lanzhou 730000 China Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 China Theoretical Physics Department Fermilab IL 60510 USA

Very recently, the Belle and BEsIII experiments observed a new charmonium-like state X（3823）, which is a good candidate for tile D-wave charmonium （13D2）. Because the X（3823） is just near the DD＊ threshold, the decay X（3823）→J/ψπ＋π- can be a golden channel to test the significance of coupled-channel effects. In this work, this decay is considered including both the hidden-charm dipion and the usual quantum chromodynamics multipole expansion （QCDME） contributions. The partial decay width, the dipion invari^nt mass spectrum distribution dF[X（3823） →J/ψπ＋π- /dmπ＋π-, and the corresponding dF[X（3823） →J/ψπ＋π-/d cosθ distribution are computed. Many param- eters are determined from exi：sting experimental data, so the results depend mainly only on one unknown phase between the QCDME and hidden-charm dipion amplitudes.

关键词： charmonium Hidden-charm dipion decay

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1-32 Radially Excited Axial Mesons and the Enigmatic Zc and Zb in a Coupled-channel Model

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IMP & HIRFL Annual Report 2015年第1期 41-42页

作者： susana coito 不详

The enigmatic charged states Zc(3900), Zc(4020), Zc(4050), Zb(10610), and Zb(10650) are studied within a coupled-channel schr¨odinger model[1], where radially excited quark-antiquark (qˉq) pairs, with the same angular momenta and isospin as the a1(1260) and b1(1235), are strongly coupled to their Okubo-Zweig-Iizuka - allowed de-cay channels DˉD+ ˉDD and DˉD, or BˉB+ ˉBB and BˉB, in s and D-wave. Poles, matching the experimental mass and width of all the above states, are found by varying only two free parameters.

关键词： Radially Excited Axial

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1-28 study of Meson spectroscopy within s-matrix Approach

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IMP & HIRFL Annual Report 2015年第1期 38-39页

作者： susana coito G. Rupp E. van Beveren 不详

The main goal of meson spectroscopy is to understand the confining force, assumed to be based on low-energy QCD. The usual quark models ignore the dynamical effects of qˉq creation and decay. Recent lattice calculations confirm the much earlier model results showing that neglecting such effects, in the so-called quenched approximation, may give rise to large discrepancies, and so distort the meson spectra resulting from quark confinement only.

关键词： Meson spectroscopy Approach

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