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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, k(gamma), g(1)(z), lambdagamma and g(5)(z). Determining each coupling in a separate fit, assuming the other couplings to take their Standard Model values, we obtain k(gamma) = 0.88(-0.08)(+0.09), g(1)(z) = 0.987 (-0.033),(+0.034) lambda(gamma) = -0.060(-0.033)(+0.034) and g(5)(z) = -0.04(-0.12)(+0.13), 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.
|Journal or Publication Title:||European Physical Journal C: Particles and Fields|
|Uncontrolled Keywords:||MONTE-CARLO PROGRAM ; ELECTROWEAK VECTOR BOSONS ; E(+)E(-) COLLISIONS ; W+W-PRODUCTION ; EVENT GENERATOR ; OPAL EXPERIMENT ; TRILINEAR COUPLINGS ; OPTIMAL OBSERVABLES ; 4-FERMION PROCESSES ; 2-PHOTON PROCESSES|
|Departments:||Faculty of Science and Technology > Physics|
|Deposited On:||09 Mar 2012 03:00|
|Last Modified:||26 Jul 2012 20:03|
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