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Production of single W bosons at √s=189 GeV and measurement of WWγ gauge couplings

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 / Sciarrino, Deborah
Published in Physics Letters. B. 2000, vol. 487, no. 3-4, p. 229-240
Abstract Single W boson production in electron-positron collisions is studied with the L3 detector at LEP. The data sample collected at a centre-of-mass energy of √s=188.7 GeV corresponds to an integrated luminosity of 176.4 pb-1. Events with a single energetic lepton or two acoplanar hadronic jets are selected. Within phase-space cuts, the total cross-section is measured to be 053±0.12±0.03 pb, consistent with the Standard Model expectation. Including our single W boson results obtained at lower √s, the WWγ gauge couplings κγ and λγ are determined to be κγ=0.93±0.16±0.09 and λγ=−0.31+0.68−0.19±0.13.
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L3 COLLABORATION. Production of single W bosons at √s=189 GeV and measurement of WWγ gauge couplings. In: Physics Letters. B, 2000, vol. 487, n° 3-4, p. 229-240. https://archive-ouverte.unige.ch/unige:47342

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Deposited on : 2015-02-27

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