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

M. Napsuciale·S. Rodriguez·E. Alvarado-Anell
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Abstract

We calculate the P0 to gamma gamma, V0 to P0 gamma and V0to V'0 gamma gamma decays in the framework of a U(3)xU(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 phi to (omega,rho) gamma gamma decays are dominated by resonant eta' exchange . Our calculation for the later decays improves and update similar calculations in the -closely related- framework of vector meson dominance. We obtain BR(phi to rho gamma gamma)=2.5x10^{-5} and BR(phi to omega gamma gamma)=2.8x10^{-6} within the scope of the high-luminosity phi factories.

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M. Napsuciale, S. Rodriguez, E. Alvarado-Anell. 2002-12-05. Radiative decays of light vector mesons in a quark level linear sigma model. https://doi.org/10.1103/physrevd.67.036007

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