Gabriele Cosmo
63 lines
2.3 KiB
Plaintext
63 lines
2.3 KiB
Plaintext
$Id: README 98775 2016-08-09 14:30:39Z gcosmo $
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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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Example RE05
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------------
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Example RE05 has a simplified collider detector geometry. This example
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demonstrates the following features.
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It was moved in extended examples from novice/N04 with removal of
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novice examples.
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1. PYTHIA primary events.
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RE05PrimaryGeneratorAction has G4HEPEvtInterface as the generator.
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G4HEPEvtInterface accesses to "pythia_event.data", which contains three
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events of Higgs generation produced by PYTHIA. "pythia_main.f" is an
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example FORTRAN code of PYTHIA for generating this event sample.
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2. Readout geometry
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RE05DetectorConstruction 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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The cylindrical calorimeter is made of tubes of lead and a scintillator.
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Energy deposition in the scintillator is accumulated by RE05CalorimeterSD
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sensitive detector, which is assigned to a dedicated parallel world,
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RE05CalorimeterParallelWorld, which defines the phi-z cell.
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3. Physics processes
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The example uses the QBBC physics list, which includes electromagnetic
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and hadronic interactions.
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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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RE05StackingAction.
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5. How to start
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- Execute RE05 in 'batch' mode from macro files
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% exampleRE05 exampleRE05.in
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- Execute RE05 in 'interactive mode' with visualization
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% exampleRE05
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....
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Idle> type your commands. For instance:
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Idle> /run/beamOn 3
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....
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Idle> exit
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