Abstract.
Triple gauge boson couplings are measured from W-pair events recorded by the OPAL detector at LEP at centre-of-mass energies of 183 - 209 GeV with a total integrated luminosity of 680 pb-1. Only CP-conserving couplings are considered and SU(2) x U(1) relations are used, resulting in four independent couplings, \(\kappa_{\gamma}, g^z_1, \lambda_{\gamma}\) and g z 5. Determining each coupling in a separate fit, assuming the other couplings to take their Standard Model values, we obtain \(\kappa_{\gamma} = 0.88^{ + 0.09}_{-0.08}\), g z 1 = 0.987 + 0.034 -0.033, \(\lambda_{\gamma} = -0.060^{ + 0.034}_{-0.033}\) and g z 5 = -0.04 + 0.13 -0.12, where the errors include both statistical and systematic uncertainties. Fits are also performed allowing some of the couplings to vary simultaneously. All results are consistent with the Standard Model predictions.
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Received: 14 July 2003, Published online: 9 March 2004
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The OPAL Collaboration. Measurement of charged current triple gauge boson couplings using W pairs at LEP. Eur. Phys. J. C 33, 463–476 (2004). https://doi.org/10.1140/epjc/s2003-01524-6
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DOI: https://doi.org/10.1140/epjc/s2003-01524-6