Investigating the excited $Ω^{0}_{c}$ states through $Ξ_{c}K$ and $Ξ^{'}_{c}K$ decay channels

Abstract

Inspired by the five newly observed $Ω^{0}_{c}$ states by the LHCb detector, we study the $Ω_{c}^{0}$ states as the $S-$wave molecular pentaquarks with $I=0$, $J^{P}=\frac{1}{2}^{-}$, $\frac{3}{2}^{-}$, and $\frac{5}{2}^{-}$ by solving the RGM equation in the framework of chiral quark model. Both the energies and the decay widths are obtained in this work. Our results suggest that $Ω_{c}(3119)^{0}$ can be explained as an $S-$wave resonance state of $ΞD$ with $J^{P}=\frac{1}{2}^{-}$, and the decay channels are the $S-$wave $Ξ_{c} K$ and $Ξ^{'}_{c}K$ . Other reported $Ω^{0}_{c}$ states cannot be obtained in our present calculation. Another $Ω_{c}^{0}$ state with much higher mass 3533 MeV with $J^{P}=\frac{5}{2}^{-}$ is also obtained. In addition, the calculation is extended to the $Ω_{b}^{0}$ states, similar results as that of $Ω^{0}_{c}$ are obtained.

6 pages, 2 figures