Speaker
Description
For the start of Run-3 CMS Full Simulation was based on Geant4 10.7.2. In this work we report on evolution of usage of Geant4 within CMSSW and adaptation of the newest Geant4 11.2.1, which is expected to be used for CMS simulation production in 2025. Physics validation results and results on CPU performance are reported.
For the Phase-2 simulation several R&D are carried out. A significant update for CMS geometry description is performed using DD4hep and VecGeom tools, modifications of the CMS geometry concern a new tracker, a new timing detector, an extended muon system, and a new endcap high granular calorimeter. Different aspects of geometry description and physics simulation for the new detectors will be discussed. Progress on R&D efforts for the Phase-2 simulation will be presented, which includes reports on experience of application of G4HepEm, Seleritas, and AdePT external libraries.
