Graziano Venanzoni (Istituto Nazionale Fisica Nucleare (IT))
We have recently completed and published the third independent measurement of the e+e- --> pi+pi-(gamma) cross section below 1 GeV, which is particularly important to test the Standard Model calculation for the (g-2) of the muon, where a long standing 3 sigma discrepancy is observed. The previous measurements, with the photon emitted at small and large angle, respectively, were normalized to the DAPHNE luminosity using large angle Bhabha scattering. In the new analysis the pion form factor is obtained directly from the pi+pi-gamma(gamma)/mu+mu-gamma(gamma) ratio, with significantly different systematic effects. In the overlap region there is a very good agreement among different KLOE measurements.
Fabio Bossi (Laboratori Nazionali di Frascati (LNF))