Interpretation of the new ${\Omega }_c^0$ states via their mass and width

Abstract

The mass and pole residue of the ground and first radially excited ${\Omega }_c^0$ states with spin-parities $J^P=1/2^{+},3/2^{+}$, as well as P-wave ${\Omega }_c^0$ with $J^P=1/2^{-},3/2^{-}$ are calculated by means of the two-point QCD sum rules. The strong decays of ${\Omega }_c^0$ baryons are also studied and width of these decay channels are computed. The relevant computations are performed in the context of the full QCD sum rules on the light-cone. Obtained results for the masses and widths are confronted with recent experimental data of LHCb Collaboration, which allow us to interpret ${\Omega }_c(3000{)}^0$, ${\Omega }_c(3050{)}^0$, and ${\Omega }_c(3119{)}^0$ as the excited $css$ baryons with the quantum numbers $(1P,1/2^{-})$, $(1P,3/2^{-})$, and $(2S,3/2^{+})$, respectively. The $(2S,1/2^{+})$ state can be assigned either to ${\Omega }_c(3066{)}^0$ state or ${\Omega }_c(3090{)}^0$ excited baryon.

arXiv comment12 Pages, 4 Figures and 4 Tables

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