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`NLO corrections to W+3jet'

Abstract: 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: BlackHat for the virtual 
one-loop matrix elements and 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.
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