NLO QCD Predictions for W+3 jets

Abstract

In this contribution we present results from the NLO computation of the production of a $W$ boson in association with three jets in hadronic collisions. The results are obtained by combining two programs: {\tt BlackHat} for the virtual one-loop matrix elements and {\tt Sherpa} for the real-emission contributions. We present results for the Tevatron and the LHC, and address the issue of the choice of a common factorization and renormalization scale for this process.

Invited talk given at the European Physical Society Europhysics Conference on High Energy Physics, EPS-HEP 2009, July 16 - 22 2009, Krakow, Poland