Measurement of $\sigma (e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}\gamma )$ and extraction of $\sigma (e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-})$ below 1 {\rm GeV} with the KLOE detector

Abstract

We have measured the cross section $\sigma (e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}\gamma )$ at an energy $W=m_{\varphi }=1.02$ GeV with the KLOE detector at the electron-positron collider DA$\Phi$NE. From the dependence of the cross section on the invariant mass of the two-pion system, we extract $\sigma (e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-})$ for the mass range $0.35<s<0.95$ GeV${}^2$. From this result, we calculate the pion form factor and the hadronic contribution to the muon anomaly, $a_{\mu }$.

20 pages, 12 figures

Cited by in corpus (126)

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• Lepton flavor violation in the Higgs sector and the role of hadronic tau-lepton decays
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• The Supersymmetric Parameter Space in Light of B-physics Observables and Electroweak Precision Data
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