The CP-conserving triple-gauge-boson couplings, g(1)(Z), kappa(gamma), lambda(gamma), g(5)(Z), kappa(Z) and lambda(Z) 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 kappa(Z) = g(1)(Z) - tan(2) thetaw(kappa(gamma) - 1) and lambda(Z) = lambda(gamma), we obtain for the C and P conserving couplings the results: g(1)(Z) = 0.966 +/- 0.033(stat) +/- 0.015(syst), kappa(gamma) = 1.013 +/- 0.066(stat) +/- 0.026(syst), lambda(gamma) = -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.

Measurement of triple-gauge-boson couplings of the W boson at LEP / Achard, P., Adriani, O., AGUILAR BENITEZ, M., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, A., Alviggi, M.g., Anderhub, H., Andreev, V.p., Anselmo, F., Arefiev, A., Azemoon, T., Aziz, T., Bagnaia, P., Bajo, A., Baksay, G., Baksay, L., Baldew, S.v., Banerjee, S., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 586:(2004), pp. 151-166. [10.1016/j.physletb.2004.02.045]

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

BAGNAIA, Paolo;BORGIA, BRUNO;DIONISI, Carlo;GENTILE, Simonetta;GIAGU, Stefano;LONGO, Egidio;LUCI, Claudio;ORGANTINI, Giovanni;PARAMATTI, Riccardo;
2004

Abstract

The CP-conserving triple-gauge-boson couplings, g(1)(Z), kappa(gamma), lambda(gamma), g(5)(Z), kappa(Z) and lambda(Z) 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 kappa(Z) = g(1)(Z) - tan(2) thetaw(kappa(gamma) - 1) and lambda(Z) = lambda(gamma), we obtain for the C and P conserving couplings the results: g(1)(Z) = 0.966 +/- 0.033(stat) +/- 0.015(syst), kappa(gamma) = 1.013 +/- 0.066(stat) +/- 0.026(syst), lambda(gamma) = -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.
2004
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of triple-gauge-boson couplings of the W boson at LEP / Achard, P., Adriani, O., AGUILAR BENITEZ, M., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, A., Alviggi, M.g., Anderhub, H., Andreev, V.p., Anselmo, F., Arefiev, A., Azemoon, T., Aziz, T., Bagnaia, P., Bajo, A., Baksay, G., Baksay, L., Baldew, S.v., Banerjee, S., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 586:(2004), pp. 151-166. [10.1016/j.physletb.2004.02.045]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/231705
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