Role of newly discovered ${\Xi }_b(6227{)}^{-}$ for constructing excited bottom baryon family

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.

Comments: 6 pages, 2 figures, 6 tables. Published version in PRD as a Rapid Communication