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Next-to-leading order QCD predictions for Z , γ * + 3 -jet distributions at the Tevatron

2010; American Physical Society; Volume: 82; Issue: 7 Linguagem: Inglês

10.1103/physrevd.82.074002

1550-7998

Carola F. Berger, Zvi Bern, Lance J. Dixon, F. Febres Cordero, D. Forde, T. Gleisberg, H. Ita, David A. Kosower, D. Maître,

Quantum Chromodynamics and Particle Interactions

Using BlackHat in conjunction with SHERPA, we have computed next-to-leading order QCD predictions for a variety of distributions in Z,gamma*+1,2,3-jet production at the Tevatron, where the Z boson or off-shell photon decays into an electron-positron pair. We find good agreement between the NLO results for jet p_T distributions and measurements by CDF and D0. We also present jet-production ratios, or probabilities of finding one additional jet. As a function of vector-boson p_T, the ratios have distinctive features which we describe in terms of a simple model capturing leading logarithms and phase-space and parton-distribution-function suppression.