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

TL;DR

This paper employs light-cone sum rules to analyze decay properties of P-wave bottom baryons, proposing a new partner state and providing detailed decay channel insights for these heavy baryons.

Contribution

It extends previous work by studying decay modes into ground-state baryons and vector mesons, and predicts a new partner state with specific decay channels.

Findings

Identifies decay properties of P-wave bottom baryons using light-cone sum rules.

Predicts a new $ ext{Xi}_b(5/2)^-$ state with a specific mass and decay mode.

Provides detailed decay channel analysis for bottom baryons.

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 $\mathbf{6}_F$ 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 $\Xi_b({5/2}^-) \to \Xi_b^{*}\rho \to \Xi_b^{*}\pi\pi$ decay process. Its mass is $12 \pm 5$~MeV larger than that of the $\Xi_{b}(6227)$.