Negative parity nonstrange baryons in large $N_c$ QCD: quark excitation   versus meson-nucleon scattering
  We show that the two complementary pictures of large $N_c$ baryons - the single-quark orbital excitation about a symmetric core and the meson-nucleon resonance -- are compatible for $\ell$ = 3 SU(4) baryons. The proof is based on a simple Hamiltonian including operators up to order $\mathcal{O}(N^0_c)$ used previously in the literature for $\ell$ = 1. 
N. Matagne and Fl. Stancu
hep-ph