We present the first measurement of the A(2) and A(3) angular coefficients of the W boson produced in proton-antiproton collisions. We study W -> e nu(e) and W ->mu nu(mu) candidate events produced in association with at least one jet at CDF, during Run Ia and Run Ib of the Tevatron at root 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 alpha(s)(2) in QCD.
|Titolo:||Measurement of the azimuthal angle distribution of leptons from W boson decays as a function of the W transverse momentum in p(p)over-bar collisions at root s = 1.8 TeV|
|Citazione:||D., A., T., A., M. G., A., D., A., D., A., K., A., et al. (2006). Measurement of the azimuthal angle distribution of leptons from W boson decays as a function of the W transverse momentum in p(p)over-bar collisions at root s = 1.8 TeV. PHYSICAL REVIEW. D. PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 73(5).|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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