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

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.