Investigating the excited Ω c 0 states through Ξ c K̄ and Ξ c ′ K̄ decay channels

Abstract

Inspired by the five newly observed Ωc0 states by the LHCb detector, we study the Ωc0 states as the S-wave molecular pentaquarks with I=0, JP=12-, 32-, and 52- by solving the renormalization group method equation in the framework of the chiral quark model. Both the energies and the decay widths are obtained in this work. Our results suggest that Ωc(3119)0 can be explained as an S-wave resonance state of ΞD with JP=12-, and the decay channels are the S-wave ΞcK̄ and Ξc′K̄. Other reported Ωc0 states cannot be obtained in our present calculation. Another Ωc0 state with much higher mass 3533 MeV with JP=52- is also obtained. In addition, the calculation is extended to the Ωb0 states, and results similar to those of Ωc0 are obtained.