Investigation of the tetraquark states QqQq in the improved chromomagnetic interaction model  

作　　者：郭涛 李嘉宁 赵佳星 何联毅 Tao Guo;Jianing Li;Jiaxing Zhao;Lianyi He(School of Mathematics and Physics,Chengdu University of Technology,Chengdu 610059,China;Department of Physics,Tsinghua University,Beijing 100084,China;SUBATECH,Universitéde Nantes,IMT Atlantique,IN2P3/CNRS,4 rue Alfred Kastler,44307 Nantes cedex 3,France)

机构地区：[1]School of Mathematics and Physics,Chengdu University of Technology,Chengdu 610059,China [2]Department of Physics,Tsinghua University,Beijing 100084,China [3]SUBATECH,Universitéde Nantes,IMT Atlantique,IN2P3/CNRS,4 rue Alfred Kastler,44307 Nantes cedex 3,France

出　　处：《Chinese Physics C》2023年第6期69-80,共12页中国物理C（英文版）

基　　金：supported by the Scientific Research Foundation of Chengdu University of Technology(10912-KYQD2022-09557);supported by the National Natural Science Foundation of China(11890712);supported by the European Union’s Horizon 2020 research and innovation program(824093(STRONG-2020))。

摘　　要：In the framework of the improved chromomagnetic interaction model,we complete a systematic study of the S-wave tetraquark states QqQq(Q=c,b,and q=u,d,s)with different quantum numbers:J^(PC)=0^(+(+)),1^(+(±)),and 2^(+(+)).The mass spectra of tetraquark states are predicted,and the possible decay channels are analyzed by considering both the angular momentum and C-parity conservation.The recently observed hidden-charm tetraquark states with strangeness,such as Z_(cs)(3985)^(-),X(3960),and Z_(cs)(4220)^(+),can be well explained in our model.Additionally,according to the wave function of each tetraquark state,we find that the low-lying states of each QqQq configuration have a large overlap to the QQ and qq meson basis,instead of the Qq and qQ meson basis.This indicates that one can search these tetraquark states in future experiments via the channel of QQ and qq mesons.

关 键 词：improved chromomagnetic interaction model hidden heavy flavor tetraquark states mass spectra and possible structures 

分 类 号：O572.33[理学—粒子物理与原子核物理]