Possible pentaquarks with heavy quarks

Inspired by the discovery of two pentaquarks \(P_{c}(4380)\) and \(P_{c}(4450)\) 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 \(N\eta _{c}\) with \(\textit{IJ}^{P}=\frac{1}{2}\frac{1}{2}^{-}\) and \(\textit{NJ}/\psi \) with \(\textit{IJ}^{P}=\frac{1}{2}\frac{3}{2}^{-}\) are bounded by channels coupling. However, \(\textit{NJ}/\psi \) with \(\textit{IJ}^{P}=\frac{1}{2}\frac{3}{2}^{-}\) may be a resonance state in the D-wave \(N\eta _{c}\) scattering process. Moreover, \(P_{c}(4380)\) can be explained as the molecular pentaquark of \(\Sigma ^{*}_{c}D\) with quantum numbers \(\textit{IJ}^{P}=\frac{1}{2}\frac{3}{2}^{-}\). The state \(\Sigma ^{*}_{c}D^{*}\) with \(\textit{IJ}^{P}=\frac{1}{2}\frac{5}{2}^{-}\) is a resonance, it may not be a good candidate of the observed \(P_{c}(4450)\) because of the opposite parity of the state to \(P_{c}(4380)\), 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.