2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/118976The baryon spectra are discussed in the context of the $1/N_c$ expansion approach, with emphasis on mixed symmetric states. The contributions of the spin dependent terms as a function of the excitation energy are shown explicitly. At large energies these contributions are expected to vanish.6 pages, based on a talk given by Fl. Stancu at the Miniworkshop "Progress in Quark Models" Bled, Slovenia, July 10-17, 2006, to be published in Bled Workshops in Physics, vol. 7 no. 1High Energy Physics - Phenomenologytext