Helac-Phegas: A generator for all parton level processes

Published: 01-10-2009| Version 1 | DOI: 10.17632/6ypjdxzpcd.1
Alessandro Cafarella,
Costas G. Papadopoulos,
Malgorzata Worek


Abstract The updated version of the Helac-Phegas^1 1URL: http://www.cern.ch/helac-phegas. event generator is presented. The matrix elements are calculated through Dyson-Schwinger recursive equations using color connection representation. Phase-space generation is based on a multichannel approach, including optimization. Helac-Phegas generates parton level events with all necessary information, in the most recent Les Houches Accord format, for the study of any process within the Standard Model in hadro... Title of program: HELAC-PHEGAS Catalogue Id: ADMS_v2_0 Nature of problem One of the most striking features of final states in current and future colliders is the large number of events with several jets. Being able to predict their features is essential. To achieve this, the calculations need to describe as accurately as possible the full matrix elements or the underlying hard processes. Even at leading order, perturbation theory based on Feynman graphs runs into computational problems, since the number of graphs contributing to the amplitude grows as n!. Versions of this program held in the CPC repository in Mendeley Data ADMS_v1_0; HELAC; 10.1016/S0010-4655(00)00151-X ADMS_v2_0; HELAC-PHEGAS; 10.1016/j.cpc.2009.04.023 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)