Masses of $[{\bf 70},\ell^+]$ baryons in large $N_c$ QCD
  Previous work is extended from SU(2) to SU(3) and we present results for the mass spectrum of the $[{\bf 70},\ell^+]$ ($\ell=0,2$) nonstrange and strange baryons in the $1/N_c$ expansion. We show that the dominant term is the spin-spin interaction and its contribution vanishes at large excitations. 
N. Matagne, Fl. Stancu