Analysis of Ω(2012) as a molecule in the chiral quark model

Inspired by the updated information on 52(2012) by the Belle Collaboration, we conduct a study of all possible S-wave pentaquark systems with quark contents sssqq over bar ; q = u, d in a chiral quark model with the help of Gaussian expansion method. Channel coupling is also considered. The real-scaling method (stabilization method) is employed to identify and check the bound states and the genuine resonances. In addition, the decay widths of all resonances are given. The results show that 52(2012) can be interpreted as a * K over bar molecular state with quantum number of IJP = 0(32)-. Another bound state 52 pi with IJP = 1(32)- is also found. Other resonances are obtained: * over bar K* with IJP = 0(12)- and 0(32)-. These pentaquark states is expected to be further verified in future experiments.

Automated summary

Inspired by the updated information on 52(2012) by the Belle Collaboration, this study investigates possible S-wave pentaquark systems using a chiral quark model and Gaussian expansion method. The results reveal new bound states and resonances, which need further verification in future experiments.