2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/42400Quark model with potentials derived from QCD, including the quark-diquark model for excited hadrons gives mass formulae in very good agreement with experiment and goes a long way in explaining the approximate symmetries and supersymmetries of the hadronic spectrum, including the symmetry breaking mechanism.4 pages, revtex; Invited talk given at XXIV International Colloquium on Group Theoretical Methods in Physics (Paris, July 15-20, 2002)High Energy Physics - Phenomenologytext