We have measured the cross section σ(e+e− → π+π−γ) as a function of the π+π− invariant mass, M ππ, with the KLOE detector at DAΦNE ( W = m φ = 1.02 GeV ). The photon in the above process is due to Initial State Radiation. Dividing by a theoretical radiator function, we obtain the cross section σ(e+e− → π+π−) for the mass range 0.37 < M2ππ < 0.93 GeV20.37 < Mππ2 < 0.93 GeV2 . We extract the pion form factor and the hadronic contribution to the muon anomaly, a μ.
Measurement of the hadronic cross section at DAFNE with the KLOE detector
GORINI, Edoardo;PRIMAVERA, Margherita;VENTURA, Andrea;
2004-01-01
Abstract
We have measured the cross section σ(e+e− → π+π−γ) as a function of the π+π− invariant mass, M ππ, with the KLOE detector at DAΦNE ( W = m φ = 1.02 GeV ). The photon in the above process is due to Initial State Radiation. Dividing by a theoretical radiator function, we obtain the cross section σ(e+e− → π+π−) for the mass range 0.37 < M2ππ < 0.93 GeV20.37 < Mππ2 < 0.93 GeV2 . We extract the pion form factor and the hadronic contribution to the muon anomaly, a μ.File in questo prodotto:
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