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 / Acciarri, M., Achard, P., Adriani, O., Aguilar Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, A., Alviggi, M., Ambrosi, G., Anderhub, H., Andreev, V.P., Angelescu, T., Anselmo, F., Arefiev, A., Azemoon, T., Aziz, T., Bagnaia, P., Bajo, A., Baksay, L., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 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

ALOISIO, ALBERTO;ALVIGGI, MARIAGRAZIA;CHIEFARI, GIOVANNI;DELLA VOLPE, DOMENICO;L. Lista;MEROLA, LEONARDO;NAPOLITANO, MARCO;PATRICELLI, SERGIO;SCIACCA, CRISOSTOMO;
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
Measurement of the W-pair production cross section and W-decay branching fractions in e(+)e(-) interactions at root s=189 GeV / Acciarri, M., Achard, P., Adriani, O., Aguilar Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, A., Alviggi, M., Ambrosi, G., Anderhub, H., Andreev, V.P., Angelescu, T., Anselmo, F., Arefiev, A., Azemoon, T., Aziz, T., Bagnaia, P., Bajo, A., Baksay, L., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 496:(2000), pp. 19-33. [10.1016/S0370-2693(00)01273-9]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/473639
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