Scalar $f_{0}(980)$ meson effect in radiative $\phi\to   \pi^{+}\pi^{-}\gamma$ decay
  We study the effect of scalar-isoscalar $f_{0}(980)$ meson in the mechanism of the radiative $\phi\to \pi^{+}\pi^{-}\gamma$ decay. A phenomenological approach is used to study this decay by considering the contributions of $\sigma$-meson, $\rho$-meson and $f_{0}(980)$-meson. The interference effects between different contributions are analyzed and the branching ratio for this decay is calculated. We observe that $f_0$ meson contribution is much larger than the contributions of the other terms. 
Saime Solmaz, Ayse Kucukarslan