English

Strong decays of the low-lying bottom strange baryons

High Energy Physics - Phenomenology 2021-05-10 v2 High Energy Physics - Experiment Nuclear Theory

Abstract

In this work, the strong decay behaviors of the λ\lambda-mode low-lying Ξb\Xi_{b} and Ξb\Xi_{b}^\prime baryons are investigated within the 3P0^3P_0 model. Our results suggest that all of the low-lying 3ˉF\bar 3_F states Ξb(2S)\Xi_b(2S), Ξb(1P)\Xi_b(1P), and Ξb(1D)\Xi_b(1D) have small decay widths of less than 20 MeV, and these states have good potentials to be observed in the Ξbπ\Xi_b^\prime \pi and Ξbπ\Xi_b^{\prime *} \pi invariant masses. Further, most of the 6F6_F multiplets are relatively narrow and may decay into the Ξbπ\Xi_b \pi, Ξbπ\Xi_b^\prime \pi, Ξbπ\Xi_b^{\prime *} \pi, and ΛbKˉ\Lambda_b \bar K final states. Considering the masses and strong decay behaviors, we can assign the newly observed Ξb(6100)\Xi_{b}(6100) resonance as the Ξb(1P)\Xi_b(1P) state with JP=3/2J^P=3/2^- and interpret the Ξb(6227)\Xi_{b}(6227) structure as the JP=3/2J^P=3/2^- Ξb(1P)\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.

Keywords

Cite

@article{arxiv.2102.07391,
  title  = {Strong decays of the low-lying bottom strange baryons},
  author = {Hui-Zhen He and Wei Liang and Qi-Fang Lü and Yu-Bing Dong},
  journal= {arXiv preprint arXiv:2102.07391},
  year   = {2021}
}

Comments

7 pages, 3 figures. Minor modifications, accepted version