Eur. Phys. J. C (2024) 84: 1055
https://doi.org/10.1140/epjc/s10052-024-13435-9

Regular Article

Pentaquark molecular states with hidden bottom and double strangeness

¹ School of Physics, Beihang University, 102206, Beijing, China
² Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna, 46071, Valencia, Spain
³ School of Physics, Zhengzhou University, 450001, Zhengzhou, China
⁴ School of Physics, Southeast University, 210094, Nanjing, China
⁵ Departamento de Física, Universidad de Murcia, 30100, Murcia, Spain

^a Song-Jing@buaa.edu.cn

Received: 2 July 2024
Accepted: 30 September 2024
Published online: 14 October 2024

Abstract

We investigate the meson-baryon interaction in coupled channels with the quantum numbers of the pentaquarks $P_{\mathit{bss}}$ and $P_{\mathit{bsss}}$. The interaction is derived from an extension of the local hidden gauge approach to the heavy quark sector, which has demonstrated accurate results compared to experiments involving ${\mathrm{\Omega }}_b$, ${\mathrm{\Xi }}_b$ states, and pentaquarks $P_c$ and $P_{\mathit{cs}}$. In our study, we identify several molecular states with small decay widths within the chosen set of coupled channels. The spin-parity ($J^P$) of these states is as follows: $J^P={\frac{1}{2}}^{-}$ for pseudoscalar-baryon (${\frac{1}{2}}^{+}$) coupled channels, $J^P={\frac{3}{2}}^{-}$ for pseudoscalar-baryon (${\frac{3}{2}}^{+}$) coupled channels, $J^P={\frac{1}{2}}^{-}$ and ${\frac{3}{2}}^{-}$ for vector-baryon (${\frac{1}{2}}^{+}$) coupled channels, and $J^P={\frac{1}{2}}^{-}$, ${\frac{3}{2}}^{-}$, ${\frac{5}{2}}^{-}$ for vector-baryon (${\frac{3}{2}}^{+}$) coupled channels. We search for the poles of these states and evaluate their couplings to the different channels.