FeynArts
The FeynArts Site
FeynArts is a Mathematica package for the generation and visualization
of Feynman diagrams and amplitudes. Its main features are:
The generation of diagrams is possible at three levels: generic
fields, classes of fields, or specific particles.
The model information is contained in two special files: The
generic model file defines the representation of the
kinematical quantities like spinors or vector fields. The
classes model file sets up the particle content and specifies
the actual couplings. Since the user can create own model files, the
applicability of FeynArts is virtually unlimited within perturbative
quantum field theory.
As generic model the Lorentz formalism (Lorentz.gen) and as classes
model the electroweak Standard Model in several variations (SM.mod,
SMQCD.mod, SMbgf.mod) and the MSSM (MSSM.mod, MSSMQCD.mod) are supplied.
In addition to ordinary diagrams, FeynArts can generate counter-term
diagrams and diagrams with placeholders for one-particle irreducible
vertex functions (skeleton diagrams).
FeynArts employs the so-called "flipping-rule" algorithm to
concatenate fermion chains. This algorithm is unique in that it
works also for fermion-number-violating couplings (e.g.
quark-squark-gluino) and hence allows supersymmetric models to be
implemented in FeynArts.
Restrictions of the type "field X is not allowed in loops"
can be applied. This is necessary e.g. for the background-field
formulation of a field theory.
Vertices of arbitrary adjacency, required for effective theories,
are allowed.
Mixing propagators, such as appear in non-R xi;-gauges,
are supported.
FeynArts produces publication-quality Feynman diagrams in PostScript
or LaTeX in a format that allows easy customization.
ul
FeynArts has been published in
Comput. Phys. Commun. 140 (2001) 418
[hep-ph/0012260].
The reference for the old version 1 is
Comput. Phys. Commun. 60 (1990) 165.
The MSSM model files are documented in
Comput. Phys. Commun. 143 (2002) 54
[hep-ph/0105349].
The historical development: FeynArts started out in 1990 as a Macsyma
code written by Hagen Eck and Sepp K uuml;blbeck which could produce
diagrams in the Standard Model, but soon got ported to the Mathematica
platform. In 1995, Eck and K uuml;blbeck designed the second version to
be a fully general diagram generator. To achieve this, they implemented
some decisive new ideas, the most important one being the generation of
diagrams in three levels. The program was taken up again in 1998 by
Thomas Hahn who developed version 2.2. The well-designed conceptual
framework was kept, but the actual code was reprogrammed almost entirely
to make it more efficient and a user-friendly topology editor was added.
The current version 3 features a completely new rendering engine for
PostScript and LaTeX, together with full support of the Mathematica
Frontend's graphical capabilities. It is also no longer dependent on the
X platform for topology editing like version 2.2.
More information:
People interested in the algorithms and program design can download
Hagen Eck's Ph.D. thesis.
There is a recent talk (PDF, 425 kB) I
gave at the Max-Planck-Institute in Munich and some less recent
transparencies of a talk I gave at
Wolfram Research on FeynArts, FormCalc, and LoopTools.
www.hep-processes.de lists
some calculations which have been performed with FeynArts.
The automatic installation script gets you started quickly and
easily.
Major improvements for Cygwin and Mac.
Download the shell script FeynInstall [5 kB, MD5: f1f2c66204be240e37d842ece819b2f5].
(Use the right mouse button and "Save Link As...")
Make it executable with chmod 755 FeynInstall.
Run it in the directory in which you want the packages installed:
./FeynInstall.
The script separately prompts you for the installation of
FeynArts, FormCalc, and LoopTools.
Finally, it asks whether to include FeynArts and FormCalc in
Mathematica's $Path.
You can download the following files:
FeynArts-3.6.tar.gz [1.54 MB, MD5: b4bbf40d2422bbe9b032e35c05e580d0]
(current version 3.6)
(Last update: 28 Mar 11)
Renamed Discard to DiagramDelete.
Added DiagramExtract function.
FeynArts-3.5.tar.gz [1.39 MB, MD5: e4d1420605e8e32a71c6aae458a608a6]
FeynArts-3.4.tar.gz [1.36 MB, MD5: 1448dc790fd9878d944d61fe752fd0bd]
FeynArts-3.3.tar.gz [1.34 MB, MD5: b2cdf34df88951c4127db926a8ea1e3f]
FeynArts-3.2.tar.gz [1.32 MB, MD5: 173d11f2061d28bb0370fe47102a28ef]
FeynArts-3.1.tar.gz [664 kB, MD5: e9e0a0decd3231190efe1b31d047a684]
FeynArts-3.0.tar.gz [578 kB, MD5: 58573073889e13c8cf6c178cca9fa3a6]
FeynArts-2.2.tar.gz [397 kB, MD5: 289bea3f907dcc293cd49d5dd05a6690]
FeynArts-2.1.tar.gz [432 kB, MD5: a3f0a54c0f291147313ce1bdf7ab3940]
FeynArts-1.2.tar.gz [279 kB, MD5: 2d61e0d019a697359daa38e8fa7ac65a]
ul
Requirements:
Mathematica 3 or above,
with Mathematica versions before 5.0, a Java VM and the J/Link
package are needed for the topology editor. Both ingredients can
be obtained free of charge from
http://www.wolfram.com/solutions/mathlink/jlink (J/Link) and
http://www.java.com
(Java). Note that many systems (e.g. Windows) have a Java VM
pre-installed. Follow the instructions that come with J/Link for
installation on the various platforms.
ul
To install FeynArts, simply unpack the archive
FeynArts-n.m.tar.gz in some directory. For more detailed
instructions see the manual in
FA3Guide.pdf. (Note: the manual is also contained in the main
distribution FeynArts-n.m.tar.gz.)
Hint: add the following statement to your personal Mathematica
init.m file (on Linux e.g. $HOME/.Mathematica/Kernel/init.m, on Mac
$HOME/Library/Mathematica/Kernel/init.m) to make the 6.0 Kernel
display graphics again:
If[ Environment["DISPLAY"] =!= $Failed,
gvfmt[_FeynArts`FeynArtsGraphics] = "PS";
gvfmt[_] = "EPS";
gv[Startup`g_] := (
Export[#, Startup`g, gvfmt @ Head[Startup`g]];
Run["(gv "  #  "; rm "  #  ") "];
Startup`g
) [ "/tmp/"  ToString[Unique["gvtmp"]]  ".ps" ];
$DisplayFunction = gv
]
FeynEdit is a new editor for Feynman diagrams. It is quite similar
to the FeynArts topology editor and also uses FeynArts' LaTeX format for
the diagrams. The program is independent of FeynArts, however, i.e. one
does not need to start from diagrams generated by FeynArts.
The program is written in Java and should thus run on almost any
platform. The Java bytecode is contained in the file
FeynEdit.jar. Users with access to a reasonable (Unixish)
programming environment may want to run make after unpacking
the tar file, which produces an executable FeynEdit that can be
invoked directly (e.g. from the command line). Alternately, start the
program with "java -jar FeynEdit.jar".
Note: a number of (mostly Debian-derived) Linux distributions seem
to have gij (GNU's java interpreter) installed instead of the original
Sun JRE. This leads to error messages like "Failed to load Main-Class
manifest attribute" when invoking FeynEdit. The problems originate
from gij rather than FeynEdit (see e.g. this post
or this).
The solution is to install Sun's original JRE, available from http://www.java.com/en/download/manual.jsp.
Windows users should be able to start the program by double-clicking
on the jar file. The Java Runtime Environment can be obtained from http://www.java.com if not installed
already.
FeynEdit has been published in arXiv:0711.1345.
You can download the following files:
FeynEdit-1.0.tar.gz [495 kB, MD5: ec4f6885a35e1f74ccf6d1c4c6aa1ff8]
(current version 1.0)
(Last update: 24 Mar 11)
Adapted FeynEdit to present feynarts.sty conventions
(e.g. "Straight" instead of "/Straight")
ul
Thanks for looking in.
Please send bug reports, suggestions, fan mail, etc. to
Thomas Hahn,
#104; #97; #104; #110; #64; #102; #101; #121; #110; #97; #114; #116; #115; #46; #100; #101;.
Related links:
FormCalc,
FeynCalc,
LoopTools.
This site and the programs offered here are not commercial.
FeynArts is and will stay an open-source package and free of charge.
If you want to use FeynArts in a commercial application, make sure
you understand the
GNU Lesser General Public License under which FeynArts is
distributed. FeynArts is being developed at the
Max-Planck-Institute for
Physics in Munich.
Last update: 28 Mar 11
Thomas Hahn
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