QCD sum rule study for hidden-strange pentaquarks  

作　　者：杨鹏飞 陈伟 Pengfei Yang;Wei Chen(School of Physics,SunYat-Sen University,Guangzhou 510275,China)

机构地区：[1]School of Physics,SunYat-Sen University,Guangzhou 510275,China

出　　处：《Chinese Physics C》2023年第1期63-74,共12页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(12175318);the National Key R&D Program of China(2020YFA0406400);the Fundamental Research Funds for the Central Universities。

摘　　要：Inspired by the LHCb observations of hidden-charm Pc(s)states,we study their hidden-strange analog Psstates in both the[udu][■s]and[uds][■u]configurations.We investigate Ps pentaquark states in the pη′,pφ,ΛK,ΣK,andΣ*K*structures with JP=1/2-andΣ*K andΣK*with JP=3/2-and calculate their masses in the framework of QCD sum rules.Our numerical results show that the extracted hadron masses for all the pη′,pφ,ΛK,ΣK,andΣ*K*structures are significantly higher than theΣK mass threshold,and the masses forΣ*K andΣK*are also higher than the threshold of the corresponding hadron;hence,no bound state exists in such channels,which is consistent with the current experimental status.

关 键 词：pentaquark states QCD sum rules 

分 类 号：O572.33[理学—粒子物理与原子核物理]