Strong decays of the low-lying bottom strange baryons

Abstract

In this work, the strong decay behaviors of the λ−mode low-lying Ξ b and Ξ ′ b baryons are investigated within the 3 P 0 model. Our results suggest that all of the low-lying 3F states Ξ b (2S ), Ξ b (1P), and Ξ b (1D) have small decay widths of less than 20 MeV, which have good potentials to be observed in the Ξ ′ b π and Ξ ′ * b π invariant masses. Also, most of the 6 F multiplets are relatively narrow, which may decay into the Ξ b π, Ξ ′ b π, Ξ ′ * b π, and Λ b K final states. Taking into account the masses and strong decay behaviors, we can assign the newly observed Ξ b (6100) resonance as the Ξ b (1P) state with J P = 3/2 − , and interpret the Ξ b (6227) structure as the J P = 3/2 − Ξ ′ b (1P) state with proper mixing angle. We hope our predictions for these excited bottom-strange baryons can provide helpful information for future experimental searches.