Pion response. Ratio between data and different versions of Geant4 for three physics lists.
The data/MC ratio of the response to pions for the ATLAS HEC calorimeter (Cu/LAr) is shown as a function of the beam energy. The response is normalized to the response for electrons. Different versions of the Geant4 predictions are shown. Three physics lists are shown.
Reference: Presentation at LCG Physics Validation Meeting