A coupled-channel perspective analysis on bottom-strange molecular pentaquarks

Abstract: At present work, we systematically study various bottom-strange molecular pentaquarks to search for possible bound states and resonances by adopting one-boson-exchange model within complex scaling method. According to our calculations, we predict several bound and resonant states for bottom baryon $Y_{b}(\Lambda_b,\Sigma_b) \bar K<sup>{(*)}$ and $Y_{b} K<sup>{(*)}$ systems. In particular, a bound state in the $I(J<sup>P)=1/2(1/2<sup>-)$ $$\Sigma_{b}\bar{K}/\Lambda_{b}\bar{K}<sup><em>/\Sigma_{b}\bar{K}^</em>$$ system may correspond to the particle $\Xi_{b}(6227)$. Meanwhile, the predicted bound state with $6303\sim6269~\rm{MeV}$ in the $$I(J<sup>P)=1/2(1/2<sup>-)\Sigma_bK/\Lambda_bK<sup><em>/\Sigma_bK^</em>$$ system is flavor exotic and does not appear in the spectroscopy of conventional baryons, which provides a practical way to clarify the nature of particle $\Xi_b(6227)$. We highly hope that our proposals can offer helpful information for the future experimental searches.