Prototyping a coherent framework for full, fast and parameteric detector simulation for the FCC project

Abstract

The outstanding success of the physics program of the Large Hadron Collider (LHC) including the discovery of the Higgs boson shifted the focus of part of the high energy physics community onto the planning phase for future circular collider (FCC) projects. A proton-proton collider is in consideration, as well as an electron-positron ring and an electron-proton option as potential LHC successor projects. Common to all projects is the need for a coherent software framework in order to carry out simulation studies to establish the potential physics reach or to test different technology approaches. Detector simulation is a particularly necessary tool needed for design studies of different detector concepts and to allow establishing the relevant performance parameters. In addition, it allows to generate data as input for the development of reconstruction algorithms needed to cope with the expected future environments. We present a coherent framework that combines full, fast and parametric detector simulation embedded in the Gaudi framework and based on the FCC event data model. Detector description is based on DD4Hep and the different simulation approaches are centrally steered through the Geant4 simulation. A prototype example of a simple tracking detector is demonstrated for the different simulation approaches and a potential work flow to use full simulation based on Geant4 and fast simulation techniques alongside is presented.