TTP05-28 Electron-positron annihilation into three pions and the radiative return.

Abstract: The Monte Carlo event generator PHOKHARA, which simulates hadron

and muon production
at electron-positron colliders through radiative return, has been extended
to final states with three pions. A model for the form factor based
on generalized vector dominance has been employed, which is consistent
with presently available experimental observations.