物理学院 School of Physics, Nanjing University

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One possible explanation of the X/Y/Z states and hunting for Glueball

2016年11月15日

报告题目:One possible explanation of the X/Y/Z states and hunting for Glueball
报告人:朱瑞林 博士
              南京师范大学理论物理研究所
时 间:12月6日(周二)下午 14:00
地 点:物理楼233

报告摘要: Motivated by four exotic charmonium-like states, i.e. X(4140), X(4274), X(4500), and X(4700), which have been observed very recently by LHCb Collaboration, we propose a general description of the exotic X/Y/Z states in a diquark-antidiquark model. Through the effective Hamiltonian, the masses and the spin-parities of the X/Y/Z states can be interpreted. One can easily find that the decay widths of the Y states into double charmed mesons are suppressed compared to that of the X/Z states to double charmed mesons. Besides, we have established the factorization formulae for heavy vector quarkonium radiative decays into scalar Glueball, by studying one-loop corrections to the hard kernel, LDMEs of heavy quarkonium, and LCDA of scalar Glueball. The factorization formulae shall be valid to all orders of the strong coupling constant in the leading-order twist and heavy quark velocity, after considering a two-dimensional LCDA of Glueball which is defined by non-local light-cone gauge-invariant operators matrix elements.

报告人简介:朱瑞林博士在2014年博士毕业于中国科学院大学物理学院,论文题目为“微扰量子色动力学及重味物理若干问题研究”,并于2012-2013作为联培博士生在美国劳伦斯伯克利国家实验室学习。2013年获中国科学院院长优秀奖。毕业后在上海交通大学做博士后研究(2014-2016)。从2016年起被南京师范大学以高层次人才引进。主要研究量子色动力学与强子物理,对于1) QCD高阶修正 2) NRQCD因子化理论与唯象 3) 新型强子态等课题有多年的研究经历。

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