2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/176626The decay width of the process eta -> pi^0 gamma gamma is calculated in the framework of the Nambu-Jona-Lasinio model. The momentum dependence of quark loops is taken into account. Three types of diagrams are considered: quark box, scalar(a0) and vector(rho, omega) pole diagrams. The obtained estimations are in satisfactory agreement with recent experimental data.9 pages, 4 figuresHigh Energy Physics - Phenomenologytext