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

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doi:10.1103/physrevd.73.052002

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

Atıf İçin Kopyala

Acosta D., Affolder T., Albrow M., Ambrose D., Amidei D., Anikeev K., ...Daha Fazla

PHYSICAL REVIEW D, cilt.73, sa.5, 2006 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 73 Sayı: 5
Basım Tarihi: 2006
Doi Numarası: 10.1103/physrevd.73.052002
Dergi Adı: PHYSICAL REVIEW D
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
İstanbul Üniversitesi Adresli: Evet

Özet

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.