Next-to-Leading Order QCD Predictions for W+3-Jet Distributions at Hadron Colliders
Abstract
We present next-to-leading order QCD predictions for a variety of distributions in W+3-jet production at both the Tevatron and the Large Hadron Collider. We include all subprocesses and incorporate the decay of the W boson into leptons. Our results are in excellent agreement with existing Tevatron data and provide the first quantitatively precise next-to-leading order predictions for the LHC. We include all terms in an expansion in the number of colors, confirming that the specific leading-color approximation used in our previous study is accurate to within three percent. The dependence of the cross section on renormalization and factorization scales is reduced significantly with respect to a leading-order calculation. We study different dynamical scale choices, and find that the total transverse energy is significantly better than choices used in previous phenomenological studies. We compute the one-loop matrix elements using on-shell methods, as numerically implemented in the BlackHat code. The remaining parts of the calculation, including generation of the real-emission contributions and integration over phase space, are handled by the SHERPA package.
Keywords
Cite
@article{arxiv.0907.1984,
title = {Next-to-Leading Order QCD Predictions for W+3-Jet Distributions at Hadron Colliders},
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:0907.1984},
year = {2009}
}
Comments
64 pages, 37 figures, v2 minor changes in table X, cross sections and distributions unaffected; other minor corrections to text, references added