Vector Meson Dominance Model for Radiative Decays Involving Light Scalar Mesons
Deirdre Black, Masayasu Harada, Joseph Schechter
Abstract
We 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 -> f0 gamma) / Gamma(phi -> a0 gamma) by including the isospin violating a0 - f0 mixing. However we find that this effect is actually small in our model.
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