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

P. Achard, O. Adriani, M. Aguilar-Benitez, J. Alcaraz, G. Alemanni, J. Allaby, A. Aloisio, M. G. Alviggi, H. Anderhub, V. P. Andreev, F. Anselmo, A. Arefiev, T. Azemoon, T. Aziz, P. Bagnaia, A. Bajo, G. Baksay, L. Baksay, S. V. Baldew, S. BanerjeeSw Banerjee, A. Barczyk, R. Barillère, P. Bartalini, M. Basile, N. Batalova, R. Battiston, A. Bay, F. Becattini, U. Becker, F. Behner, L. Bellucci, R. Berbeco, J. Berdugo, P. Berges, B. Bertucci, B. L. Betev, M. Biasini, M. Biglietti, A. Biland, J. J. Blaising, S. C. Blyth, G. J. Bobbink, A. Böhm, L. Boldizsar, B. Borgia, S. Bottai, D. Bourilkov, M. Bourquin, J. Mans, L3 Collaboration

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Abstract

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 languageEnglish (US)
Pages (from-to)151-166
Number of pages16
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume586
Issue number3-4
DOIs
StatePublished - Apr 29 2004

Bibliographical note

Publisher Copyright:
© 2004 Published by Elsevier B.V.

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