Measurement of the azimuthal angle distribution of leptons from W boson decays as a function of the W transverse momentum in proton-antiproton collisions at sqrt(s)=1.8 TeV

Abstract

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 and W-> mu+nu candidate events produced in association with at least one jet at CDF, during Run Ia and Run Ib of the Tevatron at sqrt(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.

28 pages, 33 figures, submitted to Phys. Rev. D

References in corpus (1)

• Study of the angular coefficients and corresponding helicity cross sections of the W boson in hadron collisions

Cited by in corpus (11)

• Left-Handed W Bosons at the LHC
• Electroweak gauge boson polarisation at the LHC
• Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at sqrt(s) = 7 TeV with the ATLAS experiment
• T-odd effects in photon-jet production at the Tevatron
• Angular coefficients in W+j production at the LHC with high precision
• Constraints on the ${\chi }_{c1}$ versus ${\chi }_{c2}$ polarizations in proton-proton collisions at $\sqrt{s}=$ 8 TeV
• W production at LHC: lepton angular distributions and reference frames for probing hard QCD
• Parity-Odd Asymmetries in W-Jet Events at the Tevatron
• T-odd Asymmetry in W+jet Events at the LHC
• From prompt to direct J/$\psi$ production: new insights on the ${\chi }_{c1}$ and ${\chi }_{c2}$ polarizations and feed-down contributions from a global-fit analysis of mid-rapidity LHC data
• Lepton angular distribution of $W$ boson productions