Role of newly discovered $\Xi_b(6227)^-$ for constructing excited bottom baryon family

TL;DR

This paper analyzes the structure and decay behaviors of the newly observed $ ext{Xi}_b(6227)^-$ baryon, proposing it as a P-wave state and predicting properties of its partner states to aid future experimental searches.

Contribution

It provides a mass spectrum and decay analysis of $ ext{Xi}_b(6227)^-$, identifying it as a P-wave bottom baryon and predicting partner states to guide experimental exploration.

Findings

$ ext{Xi}_b(6227)^-$ is a candidate P-wave $ ext{Xi}_b^{ extprime}$ state with $J^P=3/2^-$ or $5/2^-$.

Predicted partner states include three $2S$ and remaining $1P$ bottom-strange baryons.

Calculated decay widths suggest feasible experimental detection at LHCb.

Abstract

Selecting the newly observed $\Xi_b(6227)^-$ by LHCb as a study example, we decode its inner structure by giving the mass spectrum analysis and the investigation of its two-body strong decay behaviors. Our result indicates that the $\Xi_b(6227)^-$ is a good candidate of the $P$-wave $\Xi_b^{\prime}$ state with $J^P=3/2^-$ or $5/2^-$. In addition, we further provide the information of the properties of the partners of the $\Xi_b(6227)^-$. These predicted states include three $2S$ states and the remaining $1P$ states in the bottom-strange baryon family. The calculated sizable Okubo-Zweig-Iizuka$-$allowed decay widths of these partners show that the experimental search for them becomes possible via LHCb. We have a reason to believe that the present study can be treated as a start point for constructing the highly excited bottom baryon spectroscopy.