Strong decay properties of P-wave single bottom baryons of the SU(3) flavor antitriplet $\bf\bar 3_F$

TL;DR

This paper systematically investigates the mass spectra and decay properties of P-wave bottom baryons in the SU(3) flavor antitriplet, providing theoretical predictions for their masses and decay widths to aid experimental searches.

Contribution

It offers a comprehensive analysis of P-wave bottom baryons' decay properties using QCD sum rules and heavy quark effective theory, identifying specific states likely observable in experiments.

Findings

Identified four $oldsymbol{ ext{Λ}_b}$ baryons with limited decay widths.

Identified four $oldsymbol{ ext{Ξ}_b}$ baryons with limited decay widths.

Predicted masses, splittings, and decay widths for these baryons.

Abstract

We study the $P$-wave bottom baryons of the $SU(3)$ flavor antitriplet and systematically calculate their strong decay properties, including their $D$-wave decays into ground-state bottom baryons with light pseudoscalar mesons and $S$-wave decays into ground-state bottom baryons with light vector mesons. Together with Refs.~\cite{Tan:2023opd,Yang:2019cvw,Yang:2020zrh,Luo:2024jov}, a rather complete investigation has been performed to study their mass spectra and strong/radiative decay properties, through the methods of QCD sum rules and light-cone sum rules within the framework of heavy quark effective theory. Among various possibilities, we identify four $\Lambda_b$ and four $\Xi_b$ baryons, with limited decay widths and so capable of being observed in experiments. Their masses, mass splittings within the same multiplets, and strong/radiative decay widths are summarized in Table~\ref{tab:decayb3f} for future experimental searching.