Different Contributions of the Decay ρ → π 0 π 0 γ

The radiative decay ρ → π0π0γ is re-examined within the framework of a phenomenological approach in which the f2 meson and σ are combined with the processes involving the vector meson intermediate states and the pion-loops. In order to obtain the scalar σ meson contribution we consider pion-loop model and no structure model, and then compare the results obtained in two models. Furthermore, using the experimental branching ratio for the radiative decay ρ → π0π0γ, we estimate the coupling constant gρσγ for a set of values of σ meson parameters Mσ and Γσ.