Toward a model-independent analysis of the e+e− → P1P2γ processes close to the Φ peak

A general decomposition and possible parameterizations of the processes e+e−→γ∗→P1P2γ, where P1P2=π0π0, π0η, or π+π−, for have been discussed. We propose a general parametrization for the case where the two pseudoscalar mesons are in a JCP=0++ state.