2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46192The meson fields are simulated by quark operators and an effective chiral theory of mesons is presented. There are spontaneous chiral symmetry breaking and dynamical chiral symmetry breaking. Theoretical results agree with data well.10 pages, Talk presented at APS96 and PANIC96High Energy Physics - Phenomenologytext