首页|Dynamical study of T ss systems using the chiral quark model
Dynamical study of T ss systems using the chiral quark model
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Dynamical study of T ss systems using the chiral quark model
Since the discovery of T cc by LHCb,there has been considerable interest in T cc and its heavy-flavor part-ners.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 3P0 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 res-ults indicate that,owing to the effect of binding energy,the decay width of K*in KK*is approximately 3 MeV smal-ler 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-col-or 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.
quark modelT ss systembound stateresonances
纪家正、邢玉恒、吴新星、徐宁、谭悦
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Department of Physics,Yancheng Institute of Technology,Yancheng 224051,China
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