Study of Hidden-Charm and Hidden-Bottom Pentaquark Resonances in the Quark Model

Inspired by the LHCb observation of hidden-charm pentaquarks, i.e., Pc(4312), Pc(4440), and Pc(4457) in J/ψp invariant mass spectrum, a calculation scattering cross-section was performed using quark-delocalization color screening model. The results show that Pc(4312) can be identified as molecular state ΣcD with JP=12−. two-peak structure reproduced around 4450 MeV, which corresponds to Pc(4440) Pc(4457). They are resonances states ΣcD* JP=12− JP=32−. Moreover, Σc*D* both JP=32− possible pentaquarks. same theoretical frame, is extended Pc-like denoted Pb. Several hidden-bottom pentaquarks masses above 11 GeV narrow widths were obtained. All these heavy worth exploring future experiments.