Measurement of the hadronic cross section at DAPHNE with the KLOE detector

Achim Denig; KLOE collaboration

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arXiv · hep-ex/0311012

Measurement of the hadronic cross section at DAPHNE with the KLOE detector

Achim Denig·KLOE collaboration

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Abstract

We 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.

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Achim Denig, KLOE collaboration. 2003-11-05. Measurement of the hadronic cross section at DAPHNE with the KLOE detector. https://arxiv.org/abs/hep-ex/0311012

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