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Introduction to Geant4 in BaBar
Geant4 is
a complete redesign and rewrite of the Geant3 simulation package (on which BBSIM
is based) using C++ and object oriented technology. The project (RD44) was
initiated
in 1994 by the Simulation team at CERN led by Simone Giani and has been undertaken by an
international collaboration of
over 100 physicists
representing most major current and upcoming HEP experiments.
Geant4 has been and is being continuously compared through its development with the frozen
Geant3.21,
producing in December 1998 a validated public release that betters Geant321 in terms
of physics, performance and capabilities.
The complementary RD45 Project
developed a persistent object manager for HEP and provides Geant4's object persistency (I/O).
Geant4 is allied with the LHC++/CLHEP project
to develop a standard suite of C++ classes and development/analysis tools for HEP.
BaBar adopted Geant4 as the basis for the final production simulation at the September 1995
collaboration meeting. Since then BaBar collaborators have participated in the design and
implementation of Geant4 with an emphasis on those components uniquely vital to BaBar
(such as Geant3 migration tools and fast parameterisation).
See the simulation developers page
for BaBar collaborators involved in Geant4.
BaBar, together with other 11 laboratories, experiments and national organizations signed the
Memorandum of Understanding
(MoU) document which defines the distribution of the management, support, and future development of the Geant4
software.
Direct BaBar participation in the Geant4 Collaboration is essential in order to be ready with a production
Geant4-based simulation by startup. The current Geant3-based simulation BBSIM
will remain BaBar's production simulation until the Geant4 version is fully validated.
Geant4 documentation
Geant4 Background and Related Information
Geant4 workshops and related papers
Geant4 information and contacts
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