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arXiv · 0907.1984

Next-to-Leading Order QCD Predictions for W+3-Jet Distributions at Hadron Colliders

C. F. Berger·Z. Bern·L. J. Dixon·F. Febres Cordero·D. Forde·T. Gleisberg·H. Ita·D. A. Kosower·D. Maitre
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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.

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C. F. Berger, Z. Bern, L. J. Dixon, F. Febres Cordero, D. Forde, T. Gleisberg, H. Ita, D. A. Kosower, D. Maitre. 2009-10-02. Next-to-Leading Order QCD Predictions for W+3-Jet Distributions at Hadron Colliders. https://doi.org/10.1103/physrevd.80.074036

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