We review recent NLO QCD results for W,Z + 3-jet production at hadron colliders, computed using BlackHat and SHERPA. We also include some new results for Z + 3-jet production at the LHC at 7 TeV. We report new progress towards the NLO cross section for W + 4-jet production. In particular, we show that the virtual matrix elements produced by BlackHat are numerically stable. We also show that with an improved integrator and tree-level matrix elements from BlackHat, SHERPA produces well-behaved real-emission contributions. As an illustration, we present the real-emission contributions -- including dipole-subtraction terms -- to the p_T distribution of the fourth jet, for a single subprocess with the maximum number of gluons.
@article{arxiv.1005.3728,
title = {Vector Boson + Jets with BlackHat and Sherpa},
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:1005.3728},
year = {2010}
}
Comments
6 pages, 4 figures, presented at Loops and Legs 2010