SimpleAnalysis: Truth-level Analysis Framework

Many BSM searches in ATLAS provide auxiliary information uploaded to HEPData that details a C++ analysis code snippet for the region definitions in the analysis. Up to now, the software infrastructure for this code snippet was not provided. This meant that theorists wishing to use the HEPData information would often need to reimplement the analysis selections into their own framework. This note advertises the existence of the SimpleAnalysis truth analysis framework used in ATLAS to analyse truth information. For validation, the one-lepton two-$b$-jet analysis is shown and evaluated using this framework. Making this code public is part of the ATLAS Collaboration's commitment to ``Open Science'' and should improve communication with external collaborators by demonstrating how the code snippets on HEPData are used.