Strong decays of the low-lying bottom strange baryons

TL;DR

This study investigates the decay behaviors of low-lying bottom strange baryons using the $^3P_0$ model, predicting narrow decay widths and possible experimental observations, and assigns recent resonances to specific baryon states.

Contribution

The paper provides the first detailed decay analysis of low-lying $ar 3_F$ and $6_F$ bottom strange baryons within the $^3P_0$ model, offering assignments for observed resonances.

Findings

Low-lying $ar 3_F$ states have decay widths less than 20 MeV.

Most $6_F$ multiplets are narrow and decay into specific final states.

The $ ext{Xi}_b(6100)$ is assigned as $ ext{Xi}_b(1P)$ with $J^P=3/2^-$.

Abstract

In this work, the strong decay behaviors of the $\lambda-$mode low-lying $\Xi_{b}$ and $\Xi_{b}^\prime$ baryons are investigated within the $^3P_0$ model. Our results suggest that all of the low-lying $\bar 3_F$ states $\Xi_b(2S)$, $\Xi_b(1P)$, and $\Xi_b(1D)$ have small decay widths of less than 20 MeV, and these states have good potentials to be observed in the $\Xi_b^\prime \pi$ and $\Xi_b^{\prime *} \pi$ invariant masses. Further, most of the $6_F$ multiplets are relatively narrow and may decay into the $\Xi_b \pi$, $\Xi_b^\prime \pi$, $\Xi_b^{\prime *} \pi$, and $\Lambda_b \bar K$ final states. Considering the masses and strong decay behaviors, we can assign the newly observed $\Xi_{b}(6100)$ resonance as the $\Xi_b(1P)$ state with $J^P=3/2^-$ and interpret the $\Xi_{b}(6227)$ structure as the $J^P=3/2^-$ $\Xi_b^\prime(1P)$ state with a proper mixing angle. We expect that our predictions for these excited bottom strange baryons will provide helpful information for future experimental research.