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

CollaborationWith : Achard, Pablo / Ambrosi, Giovanni / Bourquin, Maurice / Braccini, Saverio / Chamizo Llatas, Maria / Deglon, Patrick / Delmeire, Evelyne / Extermann, Pierre / Field, John / Kienzle, Maria-Novella / Pohl, Martin
Published in Physics Letters. B. 2000, vol. 496, no. 1-2, p. 19-33
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−1. The total cross section for W-pair production, combining all final states, is measured to be σWW=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.
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L3 COLLABORATION. Measurement of the W-pair production cross section and W-decay branching fractions in e+e interactions at √s=189 GeV. In: Physics Letters. B, 2000, vol. 496, n° 1-2, p. 19-33. https://archive-ouverte.unige.ch/unige:44035

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Deposited on : 2014-12-19

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