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Title: A Toolkit to Study Sensitivity of the Geant4 Predictions to the Variations of the Physics Model Parameters

Abstract

Geant4 is the leading detector simulation toolkit used in high energy physics to design detectors and to optimize calibration and reconstruction software. It employs a set of carefully validated physics models to simulate interactions of particles with matter across a wide range of interaction energies. These models, especially the hadronic ones, rely largely on directly measured cross-sections and phenomenological predictions with physically motivated parameters estimated by theoretical calculation or measurement. Because these models are tuned to cover a very wide range of possible simulation tasks, they may not always be optimized for a given process or a given material. This raises several critical questions, e.g. how sensitive Geant4 predictions are to the variations of the model parameters, or what uncertainties are associated with a particular tune of a Geant4 physics model, or a group of models, or how to consistently derive guidance for Geant4 model development and improvement from a wide range of available experimental data. We have designed and implemented a comprehensive, modular, user-friendly software toolkit to study and address such questions. It allows one to easily modify parameters of one or several Geant4 physics models involved in the simulation, and to perform collective analysis of multiple variants ofmore » the resulting physics observables of interest and comparison against a variety of corresponding experimental data. Based on modern event-processing infrastructure software, the toolkit offers a variety of attractive features, e.g. flexible run-time configurable workflow, comprehensive bookkeeping, easy to expand collection of analytical components. Design, implementation technology, and key functionalities of the toolkit are presented and illustrated with results obtained with Geant4 key hadronic models.« less

Authors:
 [1];  [1];  [1];  [2];  [1];  [1];  [2];  [1]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1413091
Report Number(s):
FERMILAB-CONF-17-325-CD
Journal ID: ISSN 1742-6588; 1642356
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physics. Conference Series
Additional Journal Information:
Journal Volume: 1085; Journal Issue: 4; Journal ID: ISSN 1742-6588
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Fields, Laura, Genser, Krzysztof, Hatcher, Robert, Kelsey, Michael, Perdue, Gabriel, Wenzel, Hans, Wright, Dennis H., and Yarba, Julia. A Toolkit to Study Sensitivity of the Geant4 Predictions to the Variations of the Physics Model Parameters. United States: N. p., 2018. Web. doi:10.1088/1742-6596/1085/4/042021.
Fields, Laura, Genser, Krzysztof, Hatcher, Robert, Kelsey, Michael, Perdue, Gabriel, Wenzel, Hans, Wright, Dennis H., & Yarba, Julia. A Toolkit to Study Sensitivity of the Geant4 Predictions to the Variations of the Physics Model Parameters. United States. doi:10.1088/1742-6596/1085/4/042021.
Fields, Laura, Genser, Krzysztof, Hatcher, Robert, Kelsey, Michael, Perdue, Gabriel, Wenzel, Hans, Wright, Dennis H., and Yarba, Julia. Thu . "A Toolkit to Study Sensitivity of the Geant4 Predictions to the Variations of the Physics Model Parameters". United States. doi:10.1088/1742-6596/1085/4/042021. https://www.osti.gov/servlets/purl/1413091.
@article{osti_1413091,
title = {A Toolkit to Study Sensitivity of the Geant4 Predictions to the Variations of the Physics Model Parameters},
author = {Fields, Laura and Genser, Krzysztof and Hatcher, Robert and Kelsey, Michael and Perdue, Gabriel and Wenzel, Hans and Wright, Dennis H. and Yarba, Julia},
abstractNote = {Geant4 is the leading detector simulation toolkit used in high energy physics to design detectors and to optimize calibration and reconstruction software. It employs a set of carefully validated physics models to simulate interactions of particles with matter across a wide range of interaction energies. These models, especially the hadronic ones, rely largely on directly measured cross-sections and phenomenological predictions with physically motivated parameters estimated by theoretical calculation or measurement. Because these models are tuned to cover a very wide range of possible simulation tasks, they may not always be optimized for a given process or a given material. This raises several critical questions, e.g. how sensitive Geant4 predictions are to the variations of the model parameters, or what uncertainties are associated with a particular tune of a Geant4 physics model, or a group of models, or how to consistently derive guidance for Geant4 model development and improvement from a wide range of available experimental data. We have designed and implemented a comprehensive, modular, user-friendly software toolkit to study and address such questions. It allows one to easily modify parameters of one or several Geant4 physics models involved in the simulation, and to perform collective analysis of multiple variants of the resulting physics observables of interest and comparison against a variety of corresponding experimental data. Based on modern event-processing infrastructure software, the toolkit offers a variety of attractive features, e.g. flexible run-time configurable workflow, comprehensive bookkeeping, easy to expand collection of analytical components. Design, implementation technology, and key functionalities of the toolkit are presented and illustrated with results obtained with Geant4 key hadronic models.},
doi = {10.1088/1742-6596/1085/4/042021},
journal = {Journal of Physics. Conference Series},
number = 4,
volume = 1085,
place = {United States},
year = {2018},
month = {10}
}

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Works referenced in this record:

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