The LoopTools Visitor Center

LoopTools is a package for evaluation of scalar and tensor one-loop integrals based on the FF package by G.J. van Oldenborgh. It features an easy Fortran, C++, and Mathematica interface to the scalar one-loop functions of FF and in addition provides the 2-, 3-, and 4-point tensor coefficient functions.

LoopTools has been published in Comput. Phys. Commun. 118 (1999) 153 [hep-ph/9807565].
FF has been published in Z. Phys. C46 (1990) 425 [scanned version from KEK].

The installation script gets you started quickly and easily.

Download the shell script FeynInstall [6 kB].
(Use the right mouse button and "Save Link to Disk...")
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.

The following files can be downloaded:

LoopTools-2.16.tar.gz [538 kB] of 2 Nov 2024
- Fixed missing dummy arg in Ecoeffb.
LoopTools-2.15.tar.gz [553 kB] of 28 Aug 2020
LoopTools-2.14.tar.gz [547 kB] of 28 Feb 2018
LoopTools-2.13.tar.gz [549 kB] of 28 Sep 2016
LoopTools-2.12.tar.gz [545 kB] of 8 May 2015
LoopTools-2.11.tar.gz [546 kB] of 8 Aug 2014
LoopTools-2.10.tar.gz [551 kB] of 14 Jul 2014
LoopTools-2.9.tar.gz [548 kB] of 24 Feb 2014
LoopTools-2.8.tar.gz [547 kB] of 5 Nov 2011
LoopTools-2.7.tar.gz [524 kB] of 6 Jul 2011
LoopTools-2.6.tar.gz [521 kB] of 21 Jun 2011
LoopTools-2.5.tar.gz [377 kB] of 12 Aug 2010
LoopTools-2.4.tar.gz [362 kB] of 24 Dec 2009
LoopTools-2.3.tar.gz [334 kB] of 13 Jan 2009
LoopTools-2.2.tar.gz [331 kB] of 27 Feb 2007
LoopTools-2.1.tar.gz [298 kB] of 7 Dec 2004
LoopTools-2.0.tar.gz [237 kB] of 30 Oct 2001
LoopTools-1.2.tar.gz [525 kB] of 19 Jul 1999
ABTools.tar.gz [4 kB] of 1 Jul 2004
ABTools is a "light" version of LoopTools. It contains just the one- and two-point functions and consists of only the Fortran library (no C++ or Mathematica part). The code is pure Fortran and very easy to build.

To compile the libraries you need f77 and gcc.
From Mathematica 7 on you must also have g++ (and libstdc++) installed for the MathLink compile.

Installation notes for the impatient:

unpack the LoopTools-m.n.tar.gz archive,
change into the LoopTools-m.n directory,
run "./configure",
run "make",
run "make install".

More detailed instructions are given in the manual contained in the LoopTools distribution.
You can obtain the manual of the current version here.

Ready-made MathLink executables (Version 2.15, statically linked as far as possible):

Linux x86_64:

macOS x86_64:

macOS ARM64:

LoopTools-Mac-ARM64.gz [1.3 MB]

Cygwin/Windows x86_64:

LoopTools-Cygwin.exe.gz [820 kB]

Instructions: download and gunzip the executable, then make it executable with "chmod 755 file".

Thanks for looking in.

Please send bug reports, suggestions, fan mail, etc. to Thomas Hahn, hahn@feynarts.de.

Related packages: FF, FeynArts, FormCalc, FeynCalc, QCDloop.

This site and the programs offered here are not commercial. LoopTools is and will stay an open-source package and free of charge. If you want to use LoopTools in a commercial application, make sure you understand the GNU Lesser General Public License under which LoopTools is distributed. LoopTools is being developed at the Max Planck Institute for Physics in Munich.

Data protection statement and Imprint

Last update: 6 Nov 24 Thomas Hahn