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Title: Using Geant4 in the BaBar Simulation

Abstract

BABAR was the first large experiment to incorporate Geant4 into its detector simulation. Since July 2001, 1.5 x 10{sup 9} BABAR events have been produced using this simulation. In a typical e{sup +}e{sup -} {yields} {Upsilon} (4s) {yields} B{sup 0}{bar B}{sup 0} event, between 30 and 60 tracks are produced in the generator and propagated through the detector, using decay, electromagnetic and hadronic processes provided by the Geant4 toolkit. The material model of the detector is very detailed and a special particle transportation module was developed so that minute features (on the few micron scale) would be sampled in the propagation without sacrificing performance. The propagation phase for such an event requires 5 CPU seconds on an 866 MHz processor. Execution speeds for other BABAR event types will also be presented. Validation of simulated events with BABAR data is ongoing, and results of Monte Carlo/data comparisons will be shown. A discussion of the design of the simulation code, how the Geant4 toolkit is used, and ongoing efforts to improve the agreement between data and Monte Carlo will also be presented.

Authors:
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (US)
OSTI Identifier:
813141
Report Number(s):
SLAC-PUB-9862
TRN: US0303669
DOE Contract Number:  
AC03-76SF00515
Resource Type:
Technical Report
Resource Relation:
Other Information: Presented at the Computing in High Energy and Nuclear Physics Conference, La Jolla, CA (US), 03/24/2003--03/28/2003; PBD: 23 May 2003
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; G CODES; PARTICLE DECAY; DESIGN; PERFORMANCE; COMPUTERIZED SIMULATION; VALIDATION; ELECTRON-POSITRON COLLISIONS; B NEUTRAL MESONS; ANTI-B NEUTRAL MESONS

Citation Formats

Wright, Dennis H. Using Geant4 in the BaBar Simulation. United States: N. p., 2003. Web. doi:10.2172/813141.
Wright, Dennis H. Using Geant4 in the BaBar Simulation. United States. https://doi.org/10.2172/813141
Wright, Dennis H. 2003. "Using Geant4 in the BaBar Simulation". United States. https://doi.org/10.2172/813141. https://www.osti.gov/servlets/purl/813141.
@article{osti_813141,
title = {Using Geant4 in the BaBar Simulation},
author = {Wright, Dennis H},
abstractNote = {BABAR was the first large experiment to incorporate Geant4 into its detector simulation. Since July 2001, 1.5 x 10{sup 9} BABAR events have been produced using this simulation. In a typical e{sup +}e{sup -} {yields} {Upsilon} (4s) {yields} B{sup 0}{bar B}{sup 0} event, between 30 and 60 tracks are produced in the generator and propagated through the detector, using decay, electromagnetic and hadronic processes provided by the Geant4 toolkit. The material model of the detector is very detailed and a special particle transportation module was developed so that minute features (on the few micron scale) would be sampled in the propagation without sacrificing performance. The propagation phase for such an event requires 5 CPU seconds on an 866 MHz processor. Execution speeds for other BABAR event types will also be presented. Validation of simulated events with BABAR data is ongoing, and results of Monte Carlo/data comparisons will be shown. A discussion of the design of the simulation code, how the Geant4 toolkit is used, and ongoing efforts to improve the agreement between data and Monte Carlo will also be presented.},
doi = {10.2172/813141},
url = {https://www.osti.gov/biblio/813141}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri May 23 00:00:00 EDT 2003},
month = {Fri May 23 00:00:00 EDT 2003}
}