Possible pentaquarks with heavy quarks

Inspired by the discovery of two pentaquarks Pc(4380) and Pc(4450) at the LHCb detector, we study possible hidden-charm molecular pentaquarks in the framework of quark delocalization color screening model. Our results suggest that both Nηc with IJP=1212- and NJ/ψ with IJP=1232- are bounded by channels coupling. However, NJ/ψ with IJP=1232- may be a resonance state in the D-wave Nηc scattering process. Moreover, Pc(4380) can be explained as the molecular pentaquark of Σc∗D with quantum numbers IJP=1232-. The state Σc∗D∗ with IJP=1252- is a resonance, it may not be a good candidate of the observed Pc(4450) because of the opposite parity of the state to Pc(4380), although the mass of the state is not far from the experimental value. In addition, the calculation is extended to the hidden-bottom pentaquarks, and similar properties to that of hidden-charm pentaquarks system are obtained.