Overview
The LanHEP program for Feynman
rules generation in momentum representation is presented. It reads
the Lagrangian written in the compact form close to 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. The output
is Feynman rules in terms of physical fields and independent parameters.
This output can be written in LaTeX format and in the form of
CompHEP
model files, which allows one to start calculations of processes in
the new physical model. Although this job is rather
straightforward and can
be done manually, it requires careful calculations and in the modern
theories with many particles and vertices can lead to errors and
misprints.
The program allows one to introduce into CompHEP new gauge theories as well
as various anomalous terms.
Installation
To install LanHEP on your computer, you should get the
archive file (see below) and unpack it. The archive contains
the C source files. To create the executable
file lhep , type 'make`. When the LanHEP is
complied, remove source files by typing 'make clean`.
The archive also contains the directory
mdl with startup file and examples
for several physical models.
Add the directory containing LanHEP
to your PATH environment variable. Than LanHEP can be started from any
other directory, it can find automatically files from the
mdl directory.
Sources
- LanHEP version 4.0.0 (updated
on Jan 16, 2020) source gzipped tar archive.
Further improvements for UFO output.
- LanHEP version 3.3.2 (updated
on Apr 17, 2018) source gzipped tar archive.
Further improvements for UFO output.
- LanHEP version 3.3.1 (updated
on Nov 15, 2017) source gzipped tar archive.
Improved UFO output.
- LanHEP version 3.2.0 (updated
on Sep 30, 2015) source gzipped tar archive.
Note is published as
arXiv:1412.5016 [physics.comp-ph]
- LanHEP version 3.1.9 (updated
on Nov 16, 2014) source gzipped tar archive.
MSSM in LHA-2 format with extensions (NMSSM, CPV, FV) is added,
in the susyLHA subrirectory of the package.
A bug in AddHernConj function is fixed. A bug with parameter
statement with aliases is fixed.
- LanHEP version 3.1.8 (updated
on July 21, 2013) source gzipped tar archive.
UFO format for Standard Model is successfully tested +
added Lorentz Levi-Civita tensor in FeynArts and UFO output.
- LanHEP version 3.1.7 (updated
on June 10, 2013) source gzipped tar archive.
Sign of 4-gluon vertex in FeynArts output is corrected.
UFO output is improved, but it still needs testing.
- LanHEP version 3.1.5 (updated
on November 27, 2011) source gzipped tar archive.
UFO output (preliminary, not tested well) is implemented, use
-ufo command line option.
- LanHEP version 3.1.4 (updated
on June 12, 2010) source , gzipped tar archive.
Tools for models with extra dimensions are implemeted.
The note describing new features of this version is
available at
arXiv:1005.1909v1 [hep-ph]
- LanHEP version 3.0.4 (updated
on April 26, 2009) source , gzipped tar archive.
A bug in LaTeX output is fixed (wrong coefficient
at L/R projector); classes for FeynArts output are
implemeted.
- LanHEP version 3.0.0 (updated
on May 06, 2008) source , gzipped tar archive. The manual
for this version is published in
arXiv:0805.0555v1
[hep-ph]
- LanHEP version 2.5.0 (updated
on Mar 31, 2008) source , gzipped tar archieve.
- LanHEP version 2.4.0 (updated
on Mar 14, 2008) source , gzipped tar archieve.
- LanHEP version 2.3.0 (updated
on Nov 23, 2007) source , gzipped tar archive,
read the note here
- LanHEP version 2.2.0 (May 2007) source
(gzipped tar archive)
- LanHEP version 2.0.0 (updated
on May 9, 1999) source (gzipped tar archive).
- LanHEP version 2.0.2 (updated
on Dec 20, 1999) source (gzipped tar archive).
- LanHEP version 2.0.4 (updated
on Sep 11, 2000) source (gzipped tar archive).
- LanHEP version 2.0.5 (updated
on Aug 30, 2001) source (gzipped tar archive).
- LanHEP version 2.0.7 (updated
on May 24, 2002) source (gzipped tar archive) - the command line
option '-mOmega' is implemented to produce the model files for micrOmega
package.
Manuals
Feynman rules obtained by means of LanHEP
References and legal information