KLOE extraction of $a_μ^{ππ}$ in the mass range [0.35,0.95] GeV^2

Details KLOE extraction of $a_μ^{ππ}$ in the mass range [0.35,0.95] GeV^2 KLOE extraction of $a_μ^{ππ}$ in the mass range [0.35,0.95] GeV^2

2007-07-27

arxiv.org/abs/0707.4078v1

Physics

High Energy Physics

High Energy Physics - Experiment

Contributed paper to Lepton Photon 2007

Scientific paper

The KLOE Experiment at the $\phi$ factory DA$\Phi$NE, has measured the cross section $\sigma(e^+e^-\to\pi^+\pi^-\gamma)$ using two different selection schemes: requiring the photon emission at small polar angle and detecting the photon at large polar angle in the calorimeter. Using a theoretical radiator function we extract the pion form factor and obtain the $\pi\pi$ contribution to the anomalous magnetic moment of the muon. Results presented here come from the analysis of 240 pb^{-1} collected in 2002, with improved systematic uncertainty with respect to the published KLOE analysis. We also include an update of the previous analysis.

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