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Gabriele Cosmo
2016-06-08 15:09:25 +02:00
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examples/novice/N04/README
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$Id: README,v 2.0 1998/07/02 14:08:56 gunter Exp $
$Id: README,v 1.2 1999/05/31 09:16:40 asaim Exp $
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ExampleN04
----------
ExampleN04 has a simplified collider detector geometry. This example
demonstrates the following features.
1. PYTHIA primary events.
ExN04PrimaryGeneratorAction has G4HEPEvtInterface as the generator.
G4HEPEvtInterface accesses to "pythia_event.data", which contains three
events of Higgs generation produced by PYTHIA. "pythia_main.f" is an
example FORTRAN code of PYTHIA for generating this event sample.
2. Readout geometry
ExN04DetectorConstruction defines a simplified collider detecor
geometry, tracker made of cylindrical tubes, calorimeter made of
cylindrical tubes, and muon trackers made of planes.
Cylindrical calorimeter is made of tubes of lead and scintirator
without cut in phi nor z direction. Energy deposition in scintirator
is accumurated by ExN04CalorimeterSD sensitive detector, which has
a readout geometry to find the phi-z cell.
3. Full set of "ordinary" physics processes
ExN04PhysicsList defines almost all of leptons and hadrons which
Geant4 has dedicated classes for. Also almost all physics processes
Geant4 has are defined.
4. Event filtering by the stacking mechanism.
Higgs events in "pythia_event.data" have two lepton pairs produced
by the Higgs decay via Z0. At the first stage of each event, only the
primary muons are tracked without tracking secondaries. then the number
of hits on the muon trackers are examined. At the next stage, only
the primary charged particles are tracked only inside the barrel
tracking area and the isolation of the primary muons are examined.
At the third stage, all particles in the RoI (Region of Interest) along
the isolated muons are tracked. All these examinations are applied in
ExN04StackingAction.