Where is the next pentaquark state?

Abstract

The LHCb Collaboration has observed two types of hidden-charm pentaquark states $P_{\ddot{I}}{ˆ}^N$ and $P_{\ddot{I}ˆs}^{\hat{I}}›$ since 2015. In this work, we predict two other types of hidden-charm pentaquark states $P_{\ddot{I}ˆs}^{\hat{I}}\pounds (4367)$ and $P_{\ddot{I}ˆss}^N(4379)$ within the framework of heavy pentaquark chiral perturbation theory. We suggest the LHCb Collaboration to observe $P_{\ddot{I}ˆss}^N(4379{)}^{-}$ and $P_{\ddot{I}ˆss}^N(4379{)}^0$ with $J^P={\frac{1}{2}}^{-}$ in the $J/\ddot{I}ˆ\hat{I}ž$ spectrum through amplitude analyses of $\hat{I}{\text{c◯}}_b^{-}\to J/\ddot{I}ˆ\hat{I}{ž}^0{K}^{-}$ decays and $B^{-}\to J/\ddot{I}ˆ\hat{I}{ž}^{-}\bar{\hat{I}}›$ decays.