Multi-jet processes at NLO

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

Where the sidewalk ends: jets and missing energy search strategies for the 7 TeV LHC

“…As a cross-check, the tt+jets / E T distribution is checked to agree with that from [93]. Similarly, the W/Z+ jets leading order cross sections are scaled with the same normalization from [95][96][97], and checked to agree with [93]. PGS 4 is used as a "transfer function" that takes hadron level events to reconstructed, detector-level objects that represent the objects that experiments at the LHC report results on [98].…”

Inclusive gluon production in pion-proton collisions and the principle of maximum conformality renormalization scale

“…Usually in QCD calculations, one chooses the renormalization scale µ 2 equal to Q 2 , p 2 T , ....p 2 T /2, where Q 2 is a typical momentum transfer in the process obtained directly from Feynman diagram and p 2 T is the squared transfer momentum of the observed particle. This approach has a problem, predicting QCD cross sections becoming negative at next-to-leading order [2,22].…”