FeynArts

FeynCalc

FormCalc

LoopTools

Root

PYTHIA

MG_ME

CompHEP

CalcHEP

LanHEP

hdecay

FeynHiggs

Prohecy4f

##
A Monte Carlo generator for a

Proper description of the Higgs decay into 4fermions

KALEU is an independent, true phase space generator. After providing it with some information about the field theory and the particular multi-particle scattering process under consideration, it returns importance sampled random phase space points. Providing it also with the total weight of each generated phase space point, it further adapts to the integration problem on the fly. It is written in Fortran, such that it can independently deal with several scattering processes in parallel.

ONELOOP is a program to evaluate the one-loop scalar 1-point, 2-point, 3-point and 4-point functions, for all kinematical configurations relevant for collider-physics, and for any non-positive imaginary parts of the internal squared masses. It deals with all UV and IR divergences within dimensional regularization. Furthermore, it provides routines to evaluate these functions using straightforward numerical integration.

# Protos - PROgram for TOp Simulations

hexagon Reduction of Six and Five Point Functions

CutTools

## Computing 1-loop amplitudes at the integrand level

Comix

URL: http://comix.freacafe.de

Comix is a multi-leg tree-level Matrix Element generator, based on the color dressed Berends-Giele recursive relations (see JHEP08(2006)062). Comix is designed to cope with especially large numbers of external legs. It employs a new algorithm to recursively compute phase space weights and can be run in multithreaded mode to make better use of multicore processors and multiprocessor machines. The original publication is JHEP12(2008)039