Decay properties of $P$-wave heavy baryons accompanied by vector mesons within light-cone sum rules

Abstract

We use the method of light-cone sum rules to study decay properties of $P$-wave bottom baryons belonging to the $SU(3)$ flavor $6_F$ representation. In Ref.~\cite{Cui:2019dzj} we have studied their mass spectrum and pionic decays, and found that the ${\Sigma }_b(6097)$ and ${\Xi }_b(6227)$ can be well interpreted as $P$-wave bottom baryons of $J^P=3/2^{-}$. In this paper we further study their decays into ground-state bottom baryons and vector mesons. We propose to search for a new state ${\Xi }_b({5/2}^{-})$, that is the $J^P=5/2^{-}$ partner state of the ${\Xi }_b(6227)$, in the ${\Xi }_b({5/2}^{-})\to {\Xi }_b^{\ast }\rho \to {\Xi }_b^{\ast }\pi \pi$ decay process. Its mass is $12\pm 5$~MeV larger than that of the ${\Xi }_b(6227)$.

Comments: 18 pages, 5 figures, 5 tables