Strong decays of the low-lying bottom strange baryons

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 ${}^3{P}_0$ 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 ${\Xi }_b^{\prime \ast }\pi$ invariant masses. Further, most of the $6_F$ multiplets are relatively narrow and may decay into the ${\Xi }_b\pi$, ${\Xi }_b^{\prime }\pi$, ${\Xi }_b^{\prime \ast }\pi$, 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.

Comments: 7 pages, 3 figures. Minor modifications, accepted version