This program generates Feynman diagrams for any process. It was done by Paulo Nogueira working at CeFEMA. Different models can be studied. There is no graphics output. The program can be downloaded from QGRAF Home Page. The manual comes with the package.
To compile you need a Fortran compiler. In Linux the command line is
gfortran qgraf-3.x.y.f -o qgraf
where x and y are the last version numbers and qgraf is the executable file. In Windows see explanation at the end.
It gives the correct
symmetry factors among diagrams.
For example for the Bhabha
Scattering (
) an input file will look
like
this. You can look at the
QED Model file
and at the corresponding
output file.
For the Standard Model the following information is relevant: