Compact pentaquark states predicted by a quark model

Meng, Q.*; Hiyama, Emiko*; Can, K. U.*; Gubler, P. ; Oka, Makoto   ; Hosaka, Atsushi; Zong, H.*

Several compact pentaquark resonances are predicted in a potential quark model. The Hamiltonian is the best available one, which reproduces the masses of the low-lying charmed and strange hadrons well. Full five-body calculations are carried out by the use of the Gaussian expansion method, and the relevant baryon-meson thresholds are taken into account explicitly. Employing the real scaling method, we predict four sharp resonances, ( = 5180 MeV, = 20 MeV) and others. These are the candidates of compact pentaquark resonance states from the current best quark model, which should be confirmed either by experiments or lattice QCD calculations.