Helac-nlo

Abstract

Based on the OPP technique and the HELAC framework, HELAC-1LOOP is a program that is capable of numerically evaluating QCD virtual corrections to scattering amplitudes. A detailed presentation of the algorithm is given, along with instructions to run the code and benchmark results. The program is part of the HELAC-NLO framework that allows for a complete evaluation of QCD NLO corrections.

minor text revisions, version to appear in Comput.Phys.Commun

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• On the Rational Terms of the one-loop amplitudes
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• Automating dipole subtraction for QCD NLO calculations
• 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
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• NLO QCD corrections to tri-boson production
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• Numerical Evaluation of Six-Photon Amplitudes
• One-loop amplitudes for W+3 jet production in hadron collisions
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