Towards W b bbar + j at NLO with an automatized approach to one-loop computations

Abstract

We present results for the O(alpha_s) virtual corrections to q g -> W b bbar q' obtained with a new automatized approach to the evaluation of one-loop amplitudes in terms of Feynman diagrams. Together with the O(alpha_s) corrections to q q' -> W b bbar g, which can be obtained from our results by crossing symmetry, this represents the bulk of the next-to-leading order virtual QCD corrections to W b bbar + j and W b + j hadronic production, calculated in a fixed-flavor scheme with four light flavors. Furthermore, these corrections represent a well defined and independent subset of the 1-loop amplitudes needed for the NNLO calculation of W b bbar. Our approach was tested against several existing results for NLO amplitudes including selected O(alpha_s) one-loop corrections to W + 3 j hadronic production. We discuss the efficiency of our method both with respect to evaluation time and numerical stability.

14 pages, 3 figures

References in corpus (25)

• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Event generation with SHERPA 1.1
• An Automated Implementation of On-Shell Methods for One-Loop Amplitudes
• Automated One-Loop Calculations with GoSam
• Assault on the NLO Wishlist: pp -> tt bb
• Precise Predictions for W + 4 Jet Production at the Large Hadron Collider
• Next-to-Leading Order QCD Predictions for W+3-Jet Distributions at Hadron Colliders
• Complete off-shell effects in top quark pair hadroproduction with leptonic decay at next-to-leading order
• NLO QCD corrections to pp -> t anti-t b anti-b + X at the LHC
• NLO QCD corrections to WWbb production at hadron colliders
• Dominant QCD Backgrounds in Higgs Boson Analyses at the LHC: A Study of pp -> t anti-t + 2 jets at Next-To-Leading Order
• W+3 jet production at the Tevatron
• Four-Jet Production at the Large Hadron Collider at Next-to-Leading Order in QCD
• Next-to-leading order QCD predictions for W+W+jj production at the LHC
• On the Numerical Evaluation of One-Loop Amplitudes: the Gluonic Case
• Hadronic top-quark pair production in association with two jets at Next-to-Leading Order QCD
• One-loop amplitudes for W+3 jet production in hadron collisions
• Production of a W boson and two jets with one b-quark tag
• Measurement of the cross section for the production of a W boson in association with b-jets in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• QCD corrections to the hadronic production of a heavy quark pair and a W-boson including decay correlations
• Associated Production of a W Boson and One b Jet
• A complete reduction of one-loop tensor 5- and 6-point integrals
• Next-to-leading order QCD predictions for $Z^0{H}^0+\mathrm{jet}$ production at LHC
• On the tensor reduction of one-loop pentagons and hexagons
• Next-to-Leading-Order Corrections to Weak Boson Production with a Massive Quark Jet Pair at Hadron Colliders

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• Recursive generation of one-loop amplitudes in the Standard Model
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• A fragmentation-based study of heavy quark production
• Wbbj production at NLO with POWHEG+MiNLO
• Hard-photon production with b jets at hadron colliders
• Electroweak Gauge-Boson Production in Association with b Jets at Hadron Colliders
• Computing for Perturbative QCD - A Snowmass White Paper