Speaker
Description
The Geant4 simulation toolkit is used by several experimental groups for detector design studies and detector beam test assessments. In the present era of increasingly detailed detectors, Geant4 plays a key role. It is required to undergo major improvements in both physics accuracy and computational performance. Calorimeter beam tests involve various particles at different energy scales and represent ideal benchmarks for the physics validation of Monte Carlo tools for radiation–matter simulation. The Geant4 Collaboration developed and maintains a validation and testing suite, geant-val, to house test-beam results and their comparison with simulations. We will report our findings from a broad validation campaign on test beam data. In particular, we investigate the Geant4 capability to model the calorimeter response, energy fluctuations, and shower shapes using data from the ATLAS experiment and experimental groups targeting future lepton colliders. Geant-val is an open project to which anyone is invited to contribute; this Workshop will give the possibility to show the Geant4 validation status, as well as to chart the next validation studies in collaboration with experimental groups running new beam tests.
