Pc resonances in the compact pentaquark picture

P-c resonances are studied in the approach of quark model and group theory. It is found that there are totally 17 possible pentaquark states with the quark contents q(3) Q (Q) over bar (q are u and d quarks; Q is c quark) in the compact pentaquark picture, where the hidden charm pentaquark states may take the color singlet-singlet ([111](qqq) circle times [111](c (c) over bar)) and color octet-octet ([21]qqq circle times [21](c (c) over bar) configurations. The theoretical results of partial decay widths of the pentaquark states show that open charm channels are the dominant decay modes for almost all hidden charm pentaquark states, but there are four pentaquark states which decay through the pJ/psi channel with sizable partial decay widths.

Automated summary

In this study, P-c resonances were investigated using the quark model and group theory. It was found that there are 17 possible pentaquark states, with dominant decay modes occurring through open charm channels for most hidden charm pentaquark states, but with four pentaquark states decaying through the pJ/psi channel with significant partial decay widths.