Measurement of the W+W-gamma Cross-section and First direct Limits on Anomalous Electroweak Quartic Gauge Couplings

Simple item page
dc.creatorThe OPAL collaboration
dc.creatorAbbiendi, G.
dc.date1999-11-01
dc.date.accessioned2026-07-07T12:02:36Z
dc.date.available2026-07-07T12:02:36Z
dc.descriptionA study of W+W- events accompanied by hard photon radiation produced in e+e- collisions at LEP is presented. Events consistent with two on-shell W-bosons and an isolated photon are selected from 183pb^-1 of data recorded at root{s}=189GeV. From these data, 17 W+W-gamma candidates are selected with photon energy greater than 10GeV, consistent with the Standard Model expectation. These events are used to measure the e+e- to W+W-gamma cross-section within a set of geometric and kinematic cuts; sigma{W+W-gamma} = 136+-37+-8 fb, where the first error is statistical and the second systematic. The photon energy spectrum is used to set the first direct, albeit weak, limits on possible anomalous contributions to the {W+ W- gamma gamma} and {W+ W- gamma Z0} vertices: -0.070GeV^{-2} < a_0/Lambda^2 < 0.070GeV^{-2}, -0.13GeV^{-2} < a_c/Lambda^2 < 0.19GeV^{-2}, -0.61GeV^{-2} < a_n/Lambda^2 < 0.57GeV^{-2}, where Lambda represents the energy scale for new physics.
dc.description23 pages, 6 figures, submitted to Phys. Letts. B
dc.identifierhttps://arxiv.org/abs/hep-ex/9910069
dc.identifierhttp://arxiv.org/abs/hep-ex/9910069
dc.identifierPhys.Lett.B471:293-307,1999
dc.identifierdoi:10.1016/S0370-2693(99)01357-X
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/207493
dc.subjectHigh Energy Physics - Experiment
dc.titleMeasurement of the W+W-gamma Cross-section and First direct Limits on Anomalous Electroweak Quartic Gauge Couplings
dc.typetext

Files

Collections

arXiv