Automatically generating Feynman rules for improved lattice field theories

Details Automatically generating Feynman rules for improved lattice field theories Automatically generating Feynman rules for improved lattice field theories

2004-11-19

arxiv.org/abs/hep-lat/0411026v1

J.Comput.Phys. 209 (2005) 340-353

Physics

High Energy Physics

High Energy Physics - Lattice

Scientific paper

10.1016/j.jcp.2005.03.010

Deriving the Feynman rules for lattice perturbation theory from actions and operators is complicated, especially when improvement terms are present. This physically important task is, however, suitable for automation. We describe a flexible algorithm for generating Feynman rules for a wide range of lattice field theories including gluons, relativistic fermions and heavy quarks. We also present an efficient implementation of this in a freely available, multi-platform programming language (\python), optimised to deal with a wide class of lattice field theories.

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