Dalitz plot analysis of e+e-→π0π0γ events at $\sqrt{s} \simeq{M}_{\phi}$ with the KLOE detector

We have studied the Dalitz plot of the e+e-→π0π0γ events (Nπ0π0γ∼65000) collected at $\sqrt{s} \simeq{M}_{\phi}$ with the KLOE detector. In the dipion invariant mass (Mππ) region below 700 MeV, the process under study is dominated by the non-resonant process e+e-→ωπ0 with ω→π0γ whereas, for higher Mππ values, the radiative φ decay to the f0(980) is the dominant mechanism. Different theoretical models are used to fit the Dalitz plot, taking also into account a possible contribution of the σ(600). For each model, we extract the f0(980) mass and its coupling to ππ, KK̄ and to the φ.