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Measurement of the azimuthal angle distribution of leptons from W boson decays as a function of the W transverse momentum in pp collisions at s√=1.8  TeV

CollaborationWith : Clark, Allan Geoffrey / D'Onofrio, Monica / Wu, Xin
Published in Physical Review. D. 2006, vol. 73, no. 05, p. 052002
Abstract We present the first measurement of the A2 and A3 angular coefficients of the W boson produced in proton-antiproton collisions. We study W→eνe and W→μνμ candidate events produced in association with at least one jet at CDF, during Run Ia and Run Ib of the Tevatron at s√=1.8  TeV. The corresponding integrated luminosity was 110  pb−1. The jet balances the transverse momentum of the W and introduces QCD effects in W boson production. The extraction of the angular coefficients is achieved through the direct measurement of the azimuthal angle of the charged lepton in the Collins-Soper rest-frame of the W boson. The angular coefficients are measured as a function of the transverse momentum of the W boson. The electron, muon, and combined results are in good agreement with the standard model prediction, up to order α2s in QCD
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CDF COLLABORATION. Measurement of the azimuthal angle distribution of leptons from W boson decays as a function of the W transverse momentum in pp collisions at s√=1.8  TeV. In: Physical Review. D, 2006, vol. 73, n° 05, p. 052002. https://archive-ouverte.unige.ch/unige:38332

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Deposited on : 2014-06-30

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