Strange cousin of Z_(c) (4020/4025) as a tetraquark state  

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》2022年第12期135-144,共10页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(12175068)。

摘　　要：Motivated by the analogous properties of Z_(c)(3900/3885)and Z_(cs)(3985/4000).we tentatively assign Z_(c)(4020=4025)as the AA^(-)-type hidden-charm tetraquark state with J^(PC)=1^(+-),where A denotes the axialvector diquark states,and explore AA^(-)-type tetraquark states without strange,with strange,and with hidden-strange via QCD sum rules in a consistent manner.We then explore the hadronic coupling constants in the two-body strong decays of tetraquark states without and with strange via QCD sum rules based on rigorous quark-hadron duality and acquire partial and total decay widths.The present calculations support assigning Z_(c)(4020=4025)as theAA^(-)-type tetraquark state with J^(PC)=1^(+-),while the predictions for its strange cousin Z_(cs)state can be confronted with experimental data in the future.

关 键 词：tetraquark state QCD sum rules 

分 类 号：O572.33[理学—粒子物理与原子核物理]