Some remarks on X(6900)

作     者：曹沁芳 陈皓 漆红荣 郑汉青 Qin-Fang Cao;Hao Chen;Hong-Rong Qi;Han-Qing Zheng

作者机构：Department of Physics and State Key Laboratory of Nuclear Physics and TechnologyPeking UniversityBeijing 100871China Department of Engineering PhysicsTsinghua UniversityBeijing 100084China Collaborative Innovation Center of Quantum MatterBeijing 100871China 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2021年第45卷第10期

页      面：25-32页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Supported in part by National Nature Science Foundations of China(11975028,10925522) China Postdoctoral Science Foundation(2020M680500) 

主　　题：X(6900) molecular state tetraquark pole counting rule spectral density function 

摘      要：The analysis of the LHCb data on X(6900)found in the di-J/ψsystem was performed using a momentum-dependent Flatté-like *** use of the pole counting rule and spectral density function sum rule provides consistent evidence that both confining and molecular states are ***,the nature of X(6900)cannot be distinguished if only the di-J/ψexperimental data with current statistics are ***,we found that the lowest state in the di-J/ψsystem likely has the same quantum numbers as X(6900),and X(6900)is probably not interpreted as a J/ψ-ψ(2 S)molecular state.