Dynamical study of T_(ss)systems using the chiral quark model  

作　　者：Jiazheng Ji Yuheng Xing Xinxing Wu Ning Xu Yue Tan 纪家正;邢玉恒;吴新星;徐宁;谭悦(Department of Physics,Yancheng Institute of Technology,Yancheng 224051,China)

机构地区：[1]Department of Physics,Yancheng Institute of Technology,Yancheng 224051,China

出　　处：《Chinese Physics C》2025年第1期60-69,共10页中国物理C(英文版)

基　　金：Supported partly by the National Natural Science Foundation of China(12205249);the Funding for School-Level Research Projects of Yancheng Institute of Technology(xjr2022039,xjr2022040,xjr2020038)。

摘　　要：Since the discovery of T_(cc)by LHCb,there has been considerable interest in T_(cc)and its heavy-flavor partners.However,the study of its strange partner T_(ss)has been largely overlooked.Within the framework of the chiral quark model,we conducted a systematic study of the bound states of T_(ss)based on the Gaussian Expansion Method.We considered all physical channels with 01^(+),including molecular and diquark structures.Moreover,by considering the coupling between diquarks and molecular states,our calculations allowed us to identify a deep bound state with a bounding energy of 60 MeV primarily composed of KK^(*).Using the^(3)P_(0)model,we calculated the decay width of K^(*)within the KK^(*)bound state,which is approximated as the decay width of the bound state in the T_(ss)system.These results indicate that,owing to the effect of binding energy,the decay width of K^(*)in KK^(*)is approximately 3 MeV smaller than that of K^(*)in vacuum.Additionally,resonance state calculations were performed.We used the real-scaling method to search for possible resonance states in the T_(ss)sysytem.Because of the strong attraction in the[K^(*)]_(8)[K^(*)]_(8)configuration,four resonance states were found in the vicinity of 2.2-2.8 GeV,predominantly featuring hidden-color structures.The decay widths of these states are less than 10 MeV.We strongly recommend experimental efforts to search for the resonance states in the T_(ss)system predicted by our calculations.

关 键 词：quark model T_(ss) system bound state RESONANCES 

分 类 号：O572.33[理学—粒子物理与原子核物理]