Quark model estimate of hidden-charm pentaquark resonances

Hiyama, Emiko; Hosaka, Atsushi; Oka, Makoto; Richard, J.-M.*

Physical Review C, 98(4), p.045208_1 - 045208_8, 2018/10

https://doi.org/10.1103/PhysRevC.98.045208

A quark model, which reproduces the ground-state mesons and baryons, i.e., the threshold energies, is applied to the configurations, where is a light quark and the charmed quark. In the calculation, several open channels are explicitly included such as , , , etc. To distinguish genuine resonances and estimate their width, we employ Gaussian Expansion Method supplemented by the real scalingmethod (stabilization). No resonance is found at the energies of the and pentaquarks. On the other hand, there is a sharp resonant state at 4690 MeV with state and another one at 4920 MeV with state, which have a compact structure.