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Measurement of charged current triple gauge boson couplings using W pairs at LEP

Research output: Contribution to journalJournal articlepeer-review

  • G Abbiendi
  • C Ainsley
  • P F Akesson
  • G Alexander
  • J Allison
  • P Amaral
  • G Anagnostou
  • K J Anderson
  • S Arcelli
  • S Asai
  • D Axen
  • G Azuelos
  • I Bailey
  • E Barberio
  • R J Barlow
  • R J Batley
  • P Bechtle
  • T Behnke
  • K W Bell
  • P J Bell
  • G Bella
  • A Bellerive
  • G Benelli
  • S Bethke
  • O Biebel
  • O Boeriu
  • P Bock
  • M Boutemeur
  • S Braibant
  • L Brigliadori
  • R M Brown
  • K Buesser
  • H J Burckhart
  • S Campana
  • R K Carnegie
  • B Caron
  • A A Carter
  • J R Carter
  • C Y Chang
  • D G Charlton
  • A Csilling
  • M Cuffiani
  • S Dado
  • A De Roeck
  • E A De Wolf
  • K Desch
  • B Dienes
  • M Donkers
  • J Dubbert
  • L Kormos
  • OPAL Collaboration
<mark>Journal publication date</mark>03/2004
<mark>Journal</mark>European Physical Journal C: Particles and Fields
Issue number4
Number of pages14
Pages (from-to)463-476
Publication StatusPublished
<mark>Original language</mark>English


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.