2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/183910The SU(3)-flavor symmetry breaking and the quark-antiquark annihilation mechanism are taken into account for describing the singlet-octet mixing for several nonets assigned by Particle Data Group(PDG). This task is approached with the mass matrix formalism.High Energy Physics - Phenomenologytext