CERN Accelerating science

CMS Note
Report number	CMS-CR-2010-297
Title	Fast Simulation of the CMS Detector at the LHC
Author(s)	Abdullin, Salavat (Fermilab) ; Azzi, Patrizia (INFN, Padua) ; Beaudette, Florian (Ecole Polytechnique) ; Janot, Patrick (CERN) ; Perrotta , Andrea (INFN, Bologna)
Publication	2010
Collaboration	CMS Collaboration
Imprint	14 Dec 2010
Number of pages	7
Presented at	Conference on Computing in High Energy and Nuclear Physics 2010, Taipei, Taiwan, 18 - 22 Oct 2010
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; CMS
Keywords	Simulation ; Software
Abstract	The CMS collaboration has developed a fast Monte Carlo simulation of the CMS detector with event production rates about 100 times faster than the GEANT4-based simulation, with nonetheless comparable accuracy for most of the physics objects typically considered in the analyses. We discuss basic technical principles of the CMS Fast Simulation and their implementation in the different components of the detector: the silicon tracker, the electromagnetic calorimeter, the hadronic calorimeter, the muon system, the Level 1 and the High Level Trigger. A few comparisons of the Fast Simulation results both with the GEANT4-based Full Simulation and with the LHC data are shown.
Copyright/License	Preprint: (License: CC-BY-4.0)