Measurement of triple gauge boson couplings from W+W− production at √s=172 GeV

, OPAL Collaboration (1998) Measurement of triple gauge boson couplings from W+W− production at √s=172 GeV. European Physical Journal C: Particles and Fields, 2 (4). pp. 597-606. ISSN 1434-6044

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We present measurements of triple gauge boson coupling parameters using data recorded by the OPAL detector at LEP2, at a centre-of-mass energy of 172 GeV. A total of 120 W-pair candidates has been selected in the qq¯qq¯qq¯qq¯ , qq¯ℓν¯ℓqq¯ℓν¯ℓ and ℓν¯ℓℓ¯′νℓ′ℓν¯ℓℓ¯′νℓ′ decay channels, for an integrated luminosity of 10.4 pb −1−1 . We use these data to determine several different anomalous coupling parameters using the measured cross-section and the distributions of kinematic variables. We measure αBϕ=0.35+1.29−1.07±0.38αBϕ=0.35−1.07+1.29±0.38 , αWϕ=0.00+0.30−0.28±0.11αWϕ=0.00−0.28+0.30±0.11 , αW=0.18+0.49−0.47±0.23αW=0.18−0.47+0.49±0.23 , Δgz1=−0.03+0.40−0.37±0.14Δg1z=−0.03−0.37+0.40±0.14 , Δκ(HISZ)γ=0.03+0.55−0.51±0.20Δκγ(HISZ)=0.03−0.51+0.55±0.20 , and Δκ=0.33+0.49−0.46±0.21Δκ=0.33−0.46+0.49±0.21 . Combining the αWϕαWϕ result with our previous result obtained from the 161 GeV data sample we measure αWϕ=−0.08+0.28−0.25±0.10αWϕ=−0.08−0.25+0.28±0.10 . All of these measurements are consistent with the Standard Model.

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Journal Article
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European Physical Journal C: Particles and Fields
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01 Nov 2016 12:50
Last Modified:
01 Jan 2022 12:38