A precise new KLOE measurement of $F_π$ with ISR events and determination of $ππ$ contribution to $a_μ$ for [0.35,0.95] GeV$^2$

Physics – High Energy Physics – High Energy Physics - Experiment

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5 pages, 4 figures, written contribution to the Proceedings of PHIPSI08, International Workshop on e+e- collisions from Phi to

Scientific paper

10.1016/j.nuclphysbps.2008.09.02

The KLOE experiment at the DA$\Phi$NE $\phi$-factory has performed a new precise measurement of the pion form factor using Initial State Radiation events, with photons emitted at small polar angle. Results based on an integrated luminosity of 240 pb$^{-1}$ and extraction of the $\pi\pi$ contribution to $a_\mu$ in the mass range [0.35,0.95] GeV$^2$ are presented, the systematic uncertainty is reduced with respect to the published KLOE result.

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