arXiv:1005.3728·v1·High Energy Physics — Phenomenology
Vector Boson + Jets with BlackHat and Sherpa
C. F. Berger🇺🇸 · Z. Bern🇺🇸 · L. J. Dixon🇺🇸 · F. Febres Cordero🇻🇪 · D. Forde🇨🇭 · T. Gleisberg🇺🇸 · H. Ita🇺🇸 · D. A. Kosower🇫🇷 · D. Maitre🇬🇧
Abstract
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.
Comments: 6 pages, 4 figures, presented at Loops and Legs 2010