CERN Accelerating science

Published Articles
Report number	FERMILAB-CONF-16-526-CD
Title	A Software Toolkit to Study Systematic Uncertainties of the Physics Models of the Geant4 Simulation Package
Author(s)	Genser, Krzysztof (Fermilab) ; Hatcher, Robert (Fermilab) ; Perdue, Gabriel (Fermilab) ; Wenzel, Hans (Fermilab) ; Yarba, Julia (Fermilab) ; Kelsey, Michael (SLAC) ; Wright, Dennis H (SLAC)
Collaboration	Geant4
Publication	SISSA, 2016
Number of pages	4
In:	PoS ICHEP2016 (2016) 878
In:	38th International Conference on High Energy Physics, Chicago, IL, USA, 03 - 10 Aug 2016, pp.878
DOI	10.22323/1.282.0878
Subject category	Computing and Computers
Accelerator/Facility, Experiment	RD44
Abstract	The Geant4 toolkit is used to model interactions between particles and matter. Geant4 employs a set of validated physics models that span a wide range of interaction energies. These models are tuned to cover a large variety of possible applications. This raises the critical question of what uncertainties are associated with the Geant4 physics model, or group of models, involved in a simulation project. To address the challenge, we have designed and implemented a comprehen- sive, modular, user-friendly software toolkit that allows the variation of one or more parameters of one or more Geant4 physics models involved in simulation studies. It also enables analysis of multiple variants of the resulting physics observables of interest in order to estimate the uncertain- ties associated with the simulation model choices. Key functionalities of the toolkit are presented in this paper and are illustrated with selected results.
Copyright/License	publication: (License: CC-BY-NC-SA)

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