Single heavy baryons with chiral partner structure in a three-flavor chiral model

Abstract

We construct an effective hadronic model including single heavy baryons (SHBs) belonging to the $(\mathbf{3},\mathbf{3})$ representation under $\mbox{SU}(3)_L \times \mbox{SU}(3)_R$ symmetry, respecting the chiral symmetry and heavy-qaurk spin-flavor symmetry. When the chiral symmetry is spontaneously broken, the SHBs are divided into the baryons with negative parity of $\bar{\mathbf 3}$ representation under $\mbox{SU}(3)$ flavor symmetry which is the chiral partners to the ones with positive parity of ${\mathbf 6}$ representation. We determine the model parameters from the available experimental data for the masses and strong decay widths of $Σ_c^{(\ast)}$, $Λ_c (2595)$, $Ξ_c (2790)$, and $Ξ_c (2815)$. Then, we predict the masses and strong decay widths of other baryons including $Ξ_b$ with negative parity. We also study radiative decays of SHBs including $Ω_c^\ast$ and $Ω_b^\ast$ with positive parity.

13 pages, 1 figure. arXiv admin note: text overlap with arXiv:1804.04872