Production of Single W Bosons at \sqrt{s}=189 GeV and Measurement of WWgamma Gauge Couplings

Abstract

Single W boson production in electron-positron collisions is studied with the L3 detector at LEP. The data sample collected at a centre-of-mass energy of \sqrt{s} = 188.7GeV corresponds to an integrated luminosity of 176.4pb^-1. Events with a single energetic lepton or two acoplanar hadronic jets are selected. Within phase-space cuts, the total cross-section is measured to be 0.53 +/- 0.12 +/- 0.03 pb, consistent with the Standard Model expectation. Including our single W boson results obtained at lower \sqrt{s}, the WWgamma gauge couplings kappa_gamma and lambda_gamma are determined to be kappa_gamma = 0.93 +/- 0.16 +/- 0.09 and lambda_gamma = -0.31 +0.68 -0.19 +/- 0.13.

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Cited by in corpus (8)

• Electroweak Measurements in Electron-Positron Collisions at W-Boson-Pair Energies at LEP
• The role of polarized positrons and electrons in revealing fundamental interactions at the Linear Collider
• Quartic anomalous couplings at LEP
• Production of Single W Bosons at LEP and Measurement of WWgamma Gauge Coupling Parameters
• Probing Anomalous Quartic Couplings in e-gamma and gamma-gamma Colliders
• Single Intermediate Vector Boson Production in e+e- collisions at sqrt(s) = 183 and 189 GeV
• Optimal observables and phase-space ambiguities
• Study of the e+e- -> Ze+e- process at LEP