The CP-conserving triple-gauge-boson couplings, gZ 1 , κγ, λγ, gZ 5 , 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 = gZ 1 - tan2 θW(κγ- 1) and λZ = λγ, we obtain for the C and P conserving couplings the results: gZ 1 = 0.966 ± 0.033(stat) ± 0.015(syst), κγ= 1.013 ± 0.066(stat) ± 0.026(syst), λγ=-0.021 ±0.035(stat) ±0.017(syst).
|Original language||English (US)|
|Number of pages||16|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - Apr 29 2004|
Bibliographical notePublisher Copyright:
© 2004 Published by Elsevier B.V.