Fine structure of pentaquark multiplets in the dynamical diquark model

We apply the dynamical diquark model to predict the spectrum of hidden-charm pentaquark states in both unflavored and open-strange sectors. Using only Hamiltonian parameters introduced in the tetraquark S- and P-wave multiplets, the model naturally produces the level spacing supported by the most recent LHCb results for Pc structures. Furthermore, using model inputs obtained from data of hidden-charm, open-strange tetraquarks (Zcs), we predict the spectrum of Pcs states, including the recently observed Pcs(4459). We find all pentaquark candidates observed to date to belong to the 1P multiplet and hence have positive parity.