Tetraquark candidates in LHCb's di-J/ψ mass spectrum  

作　　者：Zhi-Gang Wang 王志刚(Department of Physics,North China Electric Power University,Baoding 071003,China)

机构地区：[1]Department of Physics,North China Electric Power University,Baoding 071003,China

出　　处：《Chinese Physics C》2020年第11期79-85,共7页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation(11775079)。

摘　　要：In this article,we study the first radial excited states of the scalar,axialvector,vector,and tensor diquark-antidiquark-type cccc tetraquark states with the QCD sum rules and obtain the masses and pole residues;then,we use the Regge trajectories to obtain the masses of the second radial excited states.The predicted masses support assigning the broad structure from 6.2 to 6.8 GeV in the di-J/ψ mass spectrum to be the first radial excited state of the scalar,axialvector,vector,or tensor cccc tetraquark state,as well as assigning the narrow structure at about 6.9 GeV in the di-J/ψ mass spectrum to be the second radial excited state of the scalar or axialvector cccc tetraquark state.

关 键 词：tetraquark states QCD sum rules 

分 类 号：O572.33[理学—粒子物理与原子核物理]