Pentaquark molecular states with hidden bottom and double strangeness

Abstract

We investigate the meson-baryon interaction in coupled channels with the quantum numbers of the pentaquarks $P_{bss}$ and $P_{bsss}$. 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 ${\Omega }_b$, ${\Xi }_b$ states, and pentaquarks $P_c$ and $P_{cs}$. 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.

Comments: 8 pages, 1 figures