Weak decays ofΞ^((′))_(c)→Ξin the light-front quark model  

作　　者：Hong-Wei Ke Qing-Qing Kang Xiao-Hai Liu Xue-Qian Li 柯红卫;康清清;刘晓海;李学潜(School of Science,Tianjin University,Tianjin 300072,China;School of Physics,Nankai University,Tianjin 300071,China)

机构地区：[1]School of Science,Tianjin University,Tianjin 300072,China [2]School of Physics,Nankai University,Tianjin 300071,China

出　　处：《Chinese Physics C》2021年第11期34-44,共11页中国物理C（英文版）

基　　金：the National Natural Science Foundation of China(NNSFC)(12075167,11975165,11675082,11735010,12035009,12075125)。

摘　　要：Without contamination from the final state interactions,the calculation of the branching ratios of semileptonic decays Ξ^((′))_(c)→Ξ+e^(+)ν_(e) may provide further information about the inner structure of charmed baryons.Moreover,by studying such processes,one can better determine the form factors of Ξ_(c)→Ξ that can be further applied to relevant estimates.In this study,we used the light-front quark model to carry out computations where the three-body vertex functions forΞ_(c) and Ξ are employed.To fit the new data of the Belle II,we re-adjusted the model parameters to obtain β_(s[sq])=1.07 GeV,which is 2.9 times larger than β_(ss)=0.366 GeV.This value may imply that the ss pair in Ξ constitutes a more compact subsystem.Furthermore,we investigated the non-leptonic decays of Ξ^((′))_(c)→Ξ,which will be experimentally measured soon.Thus,our model will be tested in terms of consistency with the new data.

关 键 词：charmed baryon weak decay relativistic quark model 

分 类 号：O572.33[理学—粒子物理与原子核物理]