NLO QED corrections to ISR in e+ e- annihilation and the measurement of σ(e+ e- \to hadrons) using tagged photons

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dc.creatorRodrigo, German
dc.creatorRidder, Aude Gehrmann-De
dc.creatorGuilleaume, Marc
dc.creatorKuhn, Johann H.
dc.date2001-06-13
dc.date.accessioned2026-07-07T12:26:17Z
dc.date.available2026-07-07T12:26:17Z
dc.descriptionThe leptonic tensor for the process $e^+ e^- \to γ+γ^*$, which describes the next-to-leading order virtual and soft QED corrections to initial state radiation in $e^+ e^-$ annihilation with emission of an extra virtual photon decaying into hadrons, is calculated. A Monte Carlo generator for the reaction $e^+ e^- \to γ+ π^+ π^-$ has been set up which includes these corrections. It thus describes configurations where the invariant mass of the hadrons plus photon is very close to $\sqrt{s}$. Predictions for cms energies of 1 to 10 GeV, corresponding to the energies of DAPHNE and B-meson factories, are presented. The possibility for an accurate measurement using tagged photons of $σ(e^+ e^- \to hadrons)$, which plays an important role in the theoretical description of the muon anomalous magnetic moment and the running of the electromagnetic coupling, is discussed.
dc.description8 pages, 5 figures, submitted to EPJ. The complete paper is also available at http://www-ttp.physik.uni-karlsruhe.de/Preprints/
dc.identifierhttps://arxiv.org/abs/hep-ph/0106132
dc.identifierhttp://arxiv.org/abs/hep-ph/0106132
dc.identifierEur.Phys.J.C22:81-88,2001
dc.identifierdoi:10.1007/s100520100784
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/214831
dc.subjectHigh Energy Physics - Phenomenology
dc.titleNLO QED corrections to ISR in e+ e- annihilation and the measurement of σ(e+ e- \to hadrons) using tagged photons
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