Four Pion Final States with Tagged Photons at Electron Positron Colliders

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dc.creatorCzyz, H.
dc.creatorKuehn, J. H.
dc.date2000-08-24
dc.date2000-10-11
dc.date.accessioned2026-07-07T12:26:02Z
dc.date.available2026-07-07T12:26:02Z
dc.descriptionA Monte Carlo generator has been constructed to simulate the reaction e^+e^- \to γ+ 4 π, where the photon is assumed to be observed in the detector. Only initial state radiation is considered. Additional collinear photon radiation has been incorporated with the technique of structure functions. Predictions are presented for cms energies of 1GeV, 3GeV and 10GeV, corresponding to the energies of DAPHNE, BEBC and of B-meson factories. The event rates are sufficiently high to allow for a precise measurement of R(Q^2) in the region of Q between approximately 1GeV and 2.5GeV. For the construction of the program we employ isospin relations between the amplitudes governing tau decays into four pions and electron positron annihilation into four pions. Estimates of the kinematic breaking of these isospin relations as a consequence of the π^- -- π^0 mass difference are given.
dc.descriptionLATEX, 27 pages, 9 figures, discussion of the kinematic breaking of isospin relations extended, typos corrected, some formulations changed
dc.identifierhttps://arxiv.org/abs/hep-ph/0008262
dc.identifierhttp://arxiv.org/abs/hep-ph/0008262
dc.identifierEur.Phys.J.C18:497-509,2001
dc.identifierdoi:10.1007/s100520000553
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/214755
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.titleFour Pion Final States with Tagged Photons at Electron Positron Colliders
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