Radiative decays of light vector mesons in a quark level linear sigma model

We calculate the P0→γγ, V0→P0γ, and V0→V'0γγ decays in the framework of a U3xU(3) linear sigma model which includes constituent quarks. For the first two decays this approach improves results based on the anomalous Wess-Zumino term, with contributions due to SU(3) symmetry breaking and vector mixing. The φ→(ω,ρ)γγ decays are dominated by resonant η' exchange. Our calculation for the latter decays improves and updates similar calculations in the--closely related--framework of vector meson dominance. We obtain BR(φ→ργγ)=2.5x10-5 and BR(φ→ωγγ)=2.8x10-6 within the scope of the high-luminosity φ factories