ATLAS Offline software

Welcome to ATLAS Athena software!

To contribute to this project, follow our git tutorial. In particular, if you fork this project please do not forget to add the ATLAS Robot as a developer.

For ATLAS members, please see the Atlas Computing Twiki for even more information.

Branches

The following major branches are currently active:

Branch	Purpose	Main Project, Release Series
main	Upgrade, Analysis, Derivations	Athena 25.0.X, (Ath)AnalysisBase 25.2.X
24.0	Run-3 Tier0, Point1, MCProd	Athena 24.0.X, AthSimulation 24.0.X
21.2	Legacy run 2 derivations	AthDerivation 21.2.X

Links

• The ATLAS webpage will tell you all about the ATLAS experiment (for ATLAS members, the collaboration webpage is here)
• The Twiki is the main source of documentation, and has many links to sub-domains
• The software documentation page is the main entry point for tutorials, etc.
• The git repository is here
• The ATLAS Nightlies and CI page shows the build status of all nightlies
• The Doxygen code documentation is available for the main branch
• To cite Athena, you can use the following zenodo DOI