Investigating the excited ${\Omega }_c^0$ states through ${\Xi }_{c}K$ and ${\Xi }_c^{{}^{\prime }}K$ decay channels

Abstract

Inspired by the five newly observed ${\Omega }_c^0$ states by the LHCb detector, we study the ${\Omega }_c^0$ 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 ${\Omega }_c(3119{)}^0$ can be explained as an $S-$wave resonance state of $\Xi D$ with $J^P={\frac{1}{2}}^{-}$, and the decay channels are the $S-$wave ${\Xi }_{c}K$ and ${\Xi }_c^{{}^{\prime }}K$ . Other reported ${\Omega }_c^0$ states cannot be obtained in our present calculation. Another ${\Omega }_c^0$ state with much higher mass 3533 MeV with $J^P={\frac{5}{2}}^{-}$ is also obtained. In addition, the calculation is extended to the ${\Omega }_b^0$ states, similar results as that of ${\Omega }_c^0$ are obtained.

Comments: 6 pages, 2 figures