2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/185015We show how one may define baryon constituent quarks in a rigorous manner, given physical assumptions that hold in the large-N_c limit of QCD. This constituent picture gives rise to an operator expansion that has been used to study large-N_c baryon observables; here we apply it to the case of charge radii of the N and Delta states, using minimal dynamical assumptions. For example, one finds the relation r_p^2 - r_{Delta^+}^2 = r_n^2 - r_{Delta^0}^2 to be broken only by three-body, O(1/N_c^2) effects for any N_c.15 pages, 1 eps figure. Version to appear in Phys. Rev. DHigh Energy Physics - PhenomenologyNuclear Theorytext