6533b82cfe1ef96bd128ed29
RESEARCH PRODUCT
Radiative return at NLO and the measurement of the hadronic cross-section in electron–positron annihilation
Johann H. KuhnHenryk CzyzMarek SzopaGerman Rodrigosubject
PhysicsParticle physicsAnnihilationPhotonSoft photonMuonPhysics and Astronomy (miscellaneous)Astrophysics::High Energy Astrophysical PhenomenaElectron–positron annihilationHigh Energy Physics::PhenomenologyFOS: Physical sciencesFísicaVirtual particleHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)PionPositronHigh Energy Physics::ExperimentEngineering (miscellaneous)Particle Physics - Phenomenologydescription
Electron-positron annihilation into hadrons plus an energetic photon from initial state radiation allows the hadronic cross-section to be measured over a wide range of energies. The full next-to-leading order QED corrections for the cross-section for e^+ e^- annihilation into a real tagged photon and a virtual photon converting into hadrons are calculated where the tagged photon is radiated off the initial electron or positron. This includes virtual and soft photon corrections to the process e^+ e^- \to \gamma +\gamma^* and the emission of two real hard photons: e^+ e^- \to \gamma + \gamma + \gamma^*. A Monte Carlo generator has been constructed, which incorporates these corrections and simulates the production of two charged pions or muons plus one or two photons. Predictions are presented for centre-of-mass energies between 1 and 10 GeV, corresponding to the energies of DAPHNE, CLEO-C and B-meson factories.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2001-12-13 | The European Physical Journal C |