Measurement of triple-gauge-boson couplings of the W boson at LEP

Achard, P. ; Adriani, O. ; Aguilar-Benitez, M. ; Gurtu, A. ; et., al (2004) Measurement of triple-gauge-boson couplings of the W boson at LEP Physics Letters B, 586 (3-4). pp. 151-166. ISSN 0370-2693

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The CP-conserving triple-gauge-boson couplings, g1Z, κγ, λγ, g5Z, κZ and λZ are measured using hadronic and semi-leptonic W-pair events selected in 629 pb-1 of data collected at LEP with the L3 detector at centre-of-mass energies between 189 and 209 GeV. The results are combined with previous L3 measurements based on data collected at lower centre-of-mass energies and with the results from single-W production and from events with a single-photon and missing energy. Imposing the constraints κZ=g1Z-tan2θWγ-1) and λZγ, we obtain for the C and P conserving couplings the results: g1Z=0.966±0.033(stat)±0.015(syst), κ γ=1.013±0.066(stat) ±0.026(syst),λγ=-0.021±0.035(stat)±0.017(syst).Results from the analysis of fully leptonic W-pair decays are also given. All results are in agreement with the Standard Model expectations and confirm the existence of self-couplings among electroweak gauge bosons.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:84027
Deposited On:23 Feb 2012 12:05
Last Modified:23 Feb 2012 12:05

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