$P_c$ states in the mixture of molecular and pentaquark pictures

Abstract

We systematically study hidden charm pentaquark states in the constituent quark model with a general Hamiltonian for multiquark systems, considering the coupling between the $\Sigma_c^{(*)}\bar{D}^{(*)}$ molecular states and the $q^3c\bar c$ compact pentaquark states by the one-gluon exchange hyperfine interaction. The ground state hidden-charm pentaquark mass spectra and the strong decay widths are calculated. This work suggests that $P_c(4312)$, $P_c(4457)$ and $P_c(4380)$ resonances might be mainly $\Sigma_c \bar D$, $\Sigma_c \bar D^*$ and $\Sigma_c^* \bar D$ hadronic molecules respectively, and $P_c(4440)$ might include sizable pentaquark components.