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.
@article{arxiv.1004.1659,
title = {Next-to-Leading Order QCD Predictions for Z,gamma^*+3-Jet Distributions at the Tevatron},
author = {C. F. Berger and Z. Bern and L. J. Dixon and F. Febres Cordero and D. Forde and T. Gleisberg and H. Ita and D. A. Kosower and D. Maitre},
journal= {arXiv preprint arXiv:1004.1659},
year = {2013}
}
Comments
50 pages, RevTeX, 17 figures, v2 clarifications including commentary on threshold and other logarithms