Study of the decay φ→π+π−π0 with the KLOE detector

Abstract

We present a study of the reaction e+e−→π+π−π0 at the φ peak, W=M(φ)=1019.4 MeV, observed with the KLOE detector at DAΦNE. The reaction is dominated by φ production and decay, e+e−→φ→π+π−π0. From a fit to the Dalitz plot density distribution we obtain the ρ-meson parameters for its three charge states. We also find the relative amplitudes for φ→ρπ and φ→π+π−π0 and the cross section for e+e−→ωπ0 with ω→π+π−.