摘要
在过去的12年中,实验上发现了大量的类粲偶素.面对如此多新奇的态,理论学家们致力于去解释这些XYZ粒子内在的动力学机制.本文首先简短地回顾已发现的XYZ态,然后主要介绍我们组在XYZ类粲偶素理论研究中的一些工作,其中主要包括:(1)将Y(3940),Y(4140)和Y(4274)解释为强子分子态;(2)Y(4260)和Y(4360)的非共振态解释;(3)将Y(3915),Z(3930)和X(4350)这3个态解释为P波粲偶素;(4)初态单π发射机制和对Zc(3900)的研究.
In the past 12 years,dozens of charmonium-like states have been reported in experiment.Facing so abundant novel phenomena, theorists have been hard at work to reveal the underlying mechanism relevant to these XYZ states. A concise review of the observed XYZ states is first given.Then,an introduction is presented to the theoretical progress made by our group in the study of XYZ states,which includes(1) the hadronic molecular state explanations to Y( 3940), Y( 4140) and Y(4274);(2) the non-resonant explanation to Y(4260) and Y( 4360);(3) the P-wave charmonium assignment to Y( 3915),Z( 3930) and X( 4350);(4) the initial single pion emission mechanism and the observation of Zc(3900).
基金
Supported by National Natural Science Foundation of China(11222547,11175073,11035006)
关键词
类粲偶素
非微扰QCD
唯象模型
charmonium-like states
non-perturbative QCD
phenomenological model
