2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37620We have measured the cross section sigma(e+e- \to pi+pi-gamma) as a function of the pi+pi- invariant mass, M_pipi, with the KLOE detector at DAPHNE (W=m_phi=1.02GeV). The photon in the above process is due to Initial State Radiation. Dividing by a theoretical radiator function we obtain the cross section sigma(e+e- \to pi+pi-) for the mass range 0.37<M_pipi^2<0.93GeV^2. We extract the pion form factor and the hadronic contribution to the muon anomaly, a_mu.Proceedings for HADRON2003, Aschaffenburg/Germany, Aug.31-Sept.6 2003, 6 pages, 2figuresHigh Energy Physics - Experimenttext