The data collected by the L3 experiment at LEP at a centre-of-mass energy of 188.6 GeV are used to measure the W-pair production cross section and the W-boson decay branching fractions. These data correspond to an integrated luminosity of 176.8 pb-l. The total cross section for W-pair production, combining all final states, is measured to be sigma (W) = 16.24 +/- 0.37 (stat.) +/- 0.22 (syst.) pb. Including our data collected at lower centre-of-mass energies, the hadronic branching fraction of the W-boson is determined to be B(W --> qq) = [68.20 +/- 0.68 (stat.) +/- 0.33 (syst.)]%. The results agree with the Standard Model predictions. (C) 2000 Published by Elsevier Science B.V.

Measurement of the W-pair production cross section and W-decay branching fractions in e(+)e(-) interactions at root s=189 GeV / M. Acciarri, P. Achard, O. Adriani, M. Aguilar-Benitez, J. Alcaraz, G. Alemanni, J. Allaby, A. Aloisio, M. G. Alviggi, G. Ambrosi, H. Anderhub, V. P. Andreev, T. Angelescu, F. Anselmo, A. Arefiev, T. Azemoon, T. Aziz, P. Bagnaia, A. Bajo, L. Baksay, et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - ELETTRONICO. - 496:(2000), pp. 19-33. [10.1016/S0370-2693(00)01273-9]

Measurement of the W-pair production cross section and W-decay branching fractions in e(+)e(-) interactions at root s=189 GeV

ADRIANI, OSCAR;BECATTINI, FRANCESCO;D'ALESSANDRO, RAFFAELLO;
2000

Abstract

The data collected by the L3 experiment at LEP at a centre-of-mass energy of 188.6 GeV are used to measure the W-pair production cross section and the W-boson decay branching fractions. These data correspond to an integrated luminosity of 176.8 pb-l. The total cross section for W-pair production, combining all final states, is measured to be sigma (W) = 16.24 +/- 0.37 (stat.) +/- 0.22 (syst.) pb. Including our data collected at lower centre-of-mass energies, the hadronic branching fraction of the W-boson is determined to be B(W --> qq) = [68.20 +/- 0.68 (stat.) +/- 0.33 (syst.)]%. The results agree with the Standard Model predictions. (C) 2000 Published by Elsevier Science B.V.
2000
496
19
33
M. Acciarri;P. Achard;O. Adriani;M. Aguilar-Benitez;J. Alcaraz;G. Alemanni;J. Allaby;A. Aloisio;M. G. Alviggi;G. Ambrosi;H. Anderhub;V. P. ...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/774952
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