ALOHA: Automatic libraries of helicity amplitudes for Feynman diagram computations

Published: 01-10-2012| Version 1 | DOI: 10.17632/tnvbfzgy65.1
Priscila de Aquino,
William Link,
Fabio Maltoni,
Olivier Mattelaer,
Tim Stelzer


Abstract We present an application that automatically writes the Helas (HELicity Amplitude Subroutines) library corresponding to the Feynman rules of any quantum field theory Lagrangian. The code is written in Python and takes the Universal FeynRules Output (Ufo) as an input. From this input it produces the complete set of routines, wave-functions and amplitudes, that are needed for the computation of Feynman diagrams at leading as well as at higher orders. The representation is language independent a... Title of program: ALOHA Catalogue Id: AEMS_v1_0 Nature of problem An effcient numerical evaluation of a squared matrix element can be done with the help of the helicity routines implemented in the HELAS library [1]. This static library contains a limited number of helicity functions and is therefore not always able to provide the needed routine in the presence of an arbitrary interaction. This program provides a way to automatically create the corresponding routines for any given model. Versions of this program held in the CPC repository in Mendeley Data AEMS_v1_0; ALOHA; 10.1016/j.cpc.2012.05.004 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)