Version 1.4.0 is a major update of Sherpa which contains several new features.

Sherpa 1.4.0

Version 1.4.0 is a major update of Sherpa which contains several new features. Please see the Changelog below for a complete summary. If you would like to be informed about patches and newer releases, please subscribe to our announcement mailing list.


The Sherpa package can be downloaded here:

In can also be accessed via git using

  • the web interface
  • or git clone -b rel-1-4-0 for a local clone.

A Manual is included in the Manual/ directory of the tarball. It is available in the HTML and INFO format and provides extensive documentation of all parameters. It can also be found online.


The main reference describing the physics of Sherpa is JHEP02 (2009) 007. Please cite this publication if you have used Sherpa for your studies. Additionally, each run will produce a file called Sherpa_References.tex which contains information about the modules used in this run and the corresponding publications which should be referred. If in doubt, please seek the advice of the Sherpa authors.


You can find a large collection of example setups for using SHERPA in various different colliders/processes in the Examples/ directory of the tarball. They are also described in the manual.

Patches/known problems/known bugs/FAQs

All known problems/questions and their solutions can be found on our issue tracker (please log in with username "user" and password "sherpa"). If you encounter any problem while installing or running Sherpa, please open a new issue in the tracker.



All patches available for previous versions are included in this release

New features/Improvements

  • MC@NLO simulation according to arXiv:1111.1220 (unweighting possible)
  • MENLOPS simulation with MC@NLO (partial unweighting possible)
  • Colourful Catani-Seymour dipole subtraction with Comix, first used in arXiv:1112.3940
  • Accelerated process initialization in Comix
  • Improved tuning using LHC data