The decay rho⁰to π⁺+π⁻+γ and the coupling constant g_(rhoσγ)

The experimental branching ratio for the radiative decay $\rho^{0}\to\pi^{+}+\pi^{-}+\gamma$ is used to estimate the coupling constant $g_{\rho\sigma\gamma}$ for a set of values of $\sigma$-meson parameters M$_{\sigma}$ and $\Gamma_{\sigma}$. Our results are quite different than the values of this constant used in the literature.