2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/178952We study a vector dominance model which predicts a fairly large number of currently interesting decay amplitudes of the types S -> γγ, V -> S γand S -> V γ, where S and V denote scalar and vector mesons, in terms of three parameters. As an application, the model makes it easy to study in detail a recent proposal to boost the ratio Gamma(phi -> f_0 gamma) / Gamma(phi -> a_0 gamma) by including the isospin violating a_0 - f_0 mixing. However we find that this effect is actually small in our model.4 pages, 1 figure, REVTeX. Table I and paragraph on application of model to study effect of a_0 - f_0 mixing revisedHigh Energy Physics - Phenomenologytext