The decay ${\rho }^0\to {\pi }^{+}+{\pi }^{-}+\gamma$ and the coupling constant g${}_{\rho \sigma \gamma }$

Abstract

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.

Comments: 9 pages(RevTex), 5 ps figures