Masses of $[70,{\ell }^{+}]$ baryons in large $N_c$ QCD

Abstract

Previous work is extended from SU(2) to SU(3) and we present results for the mass spectrum of the $[70,{\ell }^{+}]$ ($\ell =0,2$) 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.

Comments: 4 pages, 1 figure, to appear in the proceedings of 9th International Workshop on Meson Production, Properties and Interaction (Meson2006), Cracow, Poland, 9 - 13 June 2006