Light and heavy baryon masses: the 1/N_c expansion and the quark model
  We establish a connection between the quark model and the 1/N_c expansion mass formulas used in the description of baryon resonances. We show that a remarkable compatibility exists between the two methods in the light and heavy baryon sectors. In particular, the band number used to classify baryons in the 1/N_c expansion is explained by the quark model and the mass formulas for both approaches are consistent. 
F. Buisseret, C. Semay, Fl. Stancu, N. Matagne