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[Licence| Download | New Version Template] aech_v2_0.tar.gz(458 Kbytes)
Manuscript Title: LanHEP - a package for automatic generation of Feynman rules from the Lagrangian. Version 3.2
Authors: A. Semenov
Program title: LanHEP
Catalogue identifier: AECH_v2_0
Distribution format: tar.gz
Journal reference: Comput. Phys. Commun. 201(2016)167
Programming language: C.
Computer: PC.
Operating system: Linux.
RAM: 2MB (SM) - 12MB (MSSM) - 120MB (MSSM with counterterms)
Keywords: Feynman rules.
PACS: 11.10.-z.
Classification: 4.4.

Does the new version supersede the previous version?: Yes

Nature of problem:
Deriving Feynman rules from the Lagrangian

Solution method:
The program reads the Lagrangian written in a compact form, close to the one used in publications. It means that Lagrangian terms can be written with summation over indices of broken symmetries and using special symbols for complicated expressions, such as covariant derivative and strength tensor for gauge fields. Tools for checking the correctness of the model, and for simplifying the output expressions are provided. The output is Feynman rules in terms of physical fields and independent parameters in the form of CompHEP or CalcHEP model files, which allows one to start calculations of processes in the new physical model. Alternatively, Feynman rules can be generated in FeynArts format, or as LaTeX table.

Reasons for new version:
New features make description of the new models simplier and allow to create models with extra dimensions and color sextets particles.

Summary of revisions:
  • Tools for the models with extra dimensions
  • The particle classes for FeynArts output
  • Templates for the LanHEP statements
  • Color sextet particles
  • New substutution techniques which allow to define new routines

Running time:
1sec (SM) - 8sec (MSSM) - 8min (MSSM with counterterms)