A precise new KLOE measurement of 2|Fπ| with ISR events and determination of ππ contribution to aμ from threshold to

The KLOE experiment at the DAΦNE ϕ-factory has performed a new precise measurement of the pion form factor using Initial State Radiation events, with photons emitted at large polar angle. This measurement extends the region covered by KLOE ISR measurements of the pion form factor down to the two pion production threshold. The value obtained in this measurement of the di-pion contribution to the muon anomalous magnetic moment confirms the discrepancy between the Standard Model evaluation for aμ and the experimental value measured by the (g-2) collaboration at BNL. A combination of this new result with the previous KLOE results allow to cover ∼ 70% of the leading order hadronic contribution to the muon anomaly with 1% total fractional error.