HELAC-NLO
Description
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. Title of program: HELAC-1LOOP Catalogue Id: AEOC_v1_0 Nature of problem The evaluation of virtual one-loop amplitudes for multi-particle scattering is a longstanding problem [1]. In the last years the OPP reduction technique [2] opened the road for a fully numerical approach based on the evaluation of the one-loop amplitude for well-defined values of the loop momentum. Versions of this program held in the CPC repository in Mendeley Data AEOC_v1_0; HELAC-1LOOP; 10.1016/j.cpc.2012.10.033 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)