Measurement of hadronic cross section and preliminary results on the pion form factor using the radiative return at DAφNE

Abstract

In the fixed energy environment of the e + e − collider DAφNE, KLOE can measure the cross section of the process e + e − → hadrons as a function of the hadronic system energy using the radiative return. At energies below 1 GeV, e +e − → p → π +π − is the dominating hadronic process. We report here on the status of the analysis for the e +e − → π +π −γ channel, which allows to obtain a preliminary measurement of the pion form factor using an integrated luminosity of ∼ 73 pb −1.