Linear Sigma Model predictions for V->Sgamma and S->Vgamma decays

Abstract

The radiative decays $V\to S\gamma$ and $S\to V\gamma$ with $V=\rho ,\omega ,\varphi$ and $S=a_0,\sigma ,f_0$ are calculated within the framework of the Linear Sigma Model. Current experimental data on the $\varphi \to f_0\gamma$ and $\rho \to \sigma \gamma$ branching ratios and the ratio $\Gamma (\varphi \to f_0\gamma )/\Gamma (\varphi \to a_0\gamma )$ are satisfactorily accommodated in our approach. We also estimate the decay widths of the $f_0,a_0\to \rho \gamma ,\omega \gamma$ transitions. All the processes considered are of interest for ongoing experimental programs in Frascati, Jülich and Novosibirsk.

A comment on vector meson loops added. 2 references added. Typos corrected. Accepted for publication in Physics Letters B

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Cited by in corpus (3)

• Hidden gauge formalism for the radiative decays of axial-vector mesons
• Decay of light scalar mesons into vector-photon and into pseudoscalar mesons
• Asymmetry observables in e+ e- --> pi+ pi- gamma in the phi region within a chiral unitary approach