Radiative decays of $P$-wave bottom baryons from light-cone sum rules

TL;DR

This paper uses light-cone sum rules within heavy quark effective theory to analyze the radiative decays of P-wave bottom baryons, complementing their mass spectra and strong decays, and suggests experimental studies at Belle-II, BESIII, and LHCb.

Contribution

It provides a comprehensive QCD sum rule analysis of P-wave bottom baryons' radiative decays, extending previous work on their spectra and strong decays.

Findings

Some P-wave bottom baryons have small strong decay widths, making radiative decays significant.

Predicted radiative decay widths suggest promising channels for experimental detection.

The study offers theoretical guidance for future experiments at Belle-II, BESIII, and LHCb.

Abstract

We carry out a comprehensive investigation on the radiative decays of $P$-wave bottom baryons using the light-cone sum rule method. We analyze their electromagnetic transitions into ground-state bottom baryons together with a photon. Together with their mass spectra and strong decays investigated in Refs. \cite{Yang:2020zrh,Tan:2023opd}, a rather complete QCD sum rule study has been done to understand the $P$-wave singly bottom baryons within the framework of heavy quark effective theory. As summarized in Tables~\ref{tab:candidate}/\ref{tab:candidate6f}, some $P$-wave bottom baryons have limited strong decay widths so that their radiative decay widths become non-negligible. We propose to study these excited bottom baryons and their radiative decays in the future Belle-II, BESIII, and LHCb experiments.