Gabriele Cosmo
55 lines
2.3 KiB
Plaintext
55 lines
2.3 KiB
Plaintext
$Id: README,v 1.3 2006/07/05 11:53:02 gcosmo Exp $
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-------------------------------------------------------------------
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=========================================================
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Geant4 - an Object-Oriented Toolkit for Simulation in HEP
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=========================================================
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HepMCEx01
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---------
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HepMCEx01 is based on ExampleN04, which has a simplified collider detector
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geometry. Only part of the primary generator action is replaced with new one.
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This example demonstrates the following features.
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1. HepMC interface
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ExN04PrimaryGeneratorAction has HepMCG4Interface as the generator.
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There are two types of generators provided as samples. One generator reads
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primary information from a HepMC Ascii file (data/example_MyPythia.dat).
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The other one generates primaries directly invoking PYTHIA routines
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in every event.
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2. Readout geometry
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ExN04DetectorConstruction defines a simplified collider detecor
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geometry, tracker made of cylindrical tubes, calorimeter made of
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cylindrical tubes, and muon trackers made of planes.
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Cylindrical calorimeter is made of tubes of lead and scintirator
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without cut in phi nor z direction. Energy deposition in scintirator
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is accumulated by ExN04CalorimeterSD sensitive detector, which has
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a readout geometry to find the phi-z cell.
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3. Full set of "ordinary" physics processes
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ExN04PhysicsList defines almost all of leptons and hadrons which
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Geant4 has dedicated classes for. Also almost all physics processes
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Geant4 has are defined.
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4. Event filtering by the stacking mechanism.
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Higgs events in "pythia_event.data" have two lepton pairs produced
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by the Higgs decay via Z0. At the first stage of each event, only the
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primary muons are tracked without tracking secondaries. then the number
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of hits on the muon trackers are examined. At the next stage, only
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the primary charged particles are tracked only inside the barrel
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tracking area and the isolation of the primary muons are examined.
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At the third stage, all particles in the RoI (Region of Interest) along
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the isolated muons are tracked. All these examinations are applied in
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ExN04StackingAction.
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NOTE: it requires the installation of:
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- CERNLIB 2005 and proper access to the "/cern/pro/bin" path included
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in $PATH.
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- HepMC, version 1.27 or greater and proper path defined in $HEPMC_DIR.
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