Further study ofΩ^(*)|1P_(3/2^(-))within a chiral quark model  

作　　者：钟慧华 倪如辉 陈慕阳 钟显辉 谢聚军 Hui-Hua Zhong;Ru-Hui Ni;Mu-Yang Chen;Xian-Hui Zhong;Ju-Jun Xie(Department of Physics,Hunan Normal University,Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education,Changsha 410081,China;Synergetic Innovation Center for Quantum Effects and Applications(SICQEA),Hunan Normal University,Changsha 410081,China;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Beijing 101408,China)

机构地区：[1]Department of Physics,Hunan Normal University,Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education,Changsha 410081,China [2]Synergetic Innovation Center for Quantum Effects and Applications(SICQEA),Hunan Normal University,Changsha 410081,China [3]Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China [4]School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Beijing 101408,China

出　　处：《Chinese Physics C》2023年第6期36-44,共9页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(12175065,12005060,12075288,11735003,11961141012);supported by the Youth Innovation Promotion Association CAS。

摘　　要：In our previous studies,we analyzed the two-body strong decays of the low-lyingΩbaryon states within a chiral quark model.The results showed that the mass,total width,and two body decayΩ(2012)→■could be well reproduced with the spin-parity J^(P)=3/2^(-)stateΩ^(*)|1P_(3/2^(-))>classified in the quark model.Stimulated by the new observations of the three-body decay processΩ(2012)^(-)→■at Belle,in the present study,we further investigate the three-body strong decayΩ^(*)|1P_(3/2^(-))>→■within the chiral quark model.It is found that theΩ^(*)|1P_(3/2^(-))>has a sizeable decay rate into the three-body final states■.When consideringΩ^(*)|1P_(3/2^(-))>as theΩ(2012)resonance,the predicted ratio■is close to the upper limit 11%measured by the Belle Collaboration in 2019;however,it is too small to be comparable to the recent measurement 0.97±0.24±0.07.In addition,the coupled-channel effects on the bare three-quark stateΩ^(*)|1P_(3/2^(-))>from nearby channels■are studied.Our theoretical results show that the coupled-channel effects onΩ^(*)|1P_(3/2^(-))>are not very large,and the molecular component is no more than 30%.To clarify the nature ofΩ(2012)resonance,precise measurements on the ratio■are needed,and further investigation on the effects of coupled channels is recommended.

关 键 词：Q(2012) chiral quark model three body decay 

分 类 号：O572.33[理学—粒子物理与原子核物理]