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0002
0003 =========================================================
0004 Geant4 - an Object-Oriented Toolkit for Simulation in HEP
0005 =========================================================
0006
0007 Example RE05
0008 ------------
0009
0010 Example RE05 has a simplified collider detector geometry. This example
0011 demonstrates the following features.
0012 It was moved in extended examples from novice/N04 with removal of
0013 novice examples.
0014
0015 1. PYTHIA primary events.
0016
0017 RE05PrimaryGeneratorAction has G4HEPEvtInterface as the generator.
0018 G4HEPEvtInterface accesses to "pythia_event.data", which contains three
0019 events of Higgs generation produced by PYTHIA. "pythia_main.f" is an
0020 example FORTRAN code of PYTHIA for generating this event sample.
0021
0022 2. Readout geometry
0023
0024 RE05DetectorConstruction defines a simplified collider detecor
0025 geometry, tracker made of cylindrical tubes, calorimeter made of
0026 cylindrical tubes, and muon trackers made of planes.
0027
0028 The cylindrical calorimeter is made of tubes of lead and a scintillator.
0029 Energy deposition in the scintillator is accumulated by RE05CalorimeterSD
0030 sensitive detector, which is assigned to a dedicated parallel world,
0031 RE05CalorimeterParallelWorld, which defines the phi-z cell.
0032
0033 3. Physics processes
0034
0035 The example uses the QBBC physics list, which includes electromagnetic
0036 and hadronic interactions.
0037
0038 4. Event filtering by the stacking mechanism.
0039
0040 Higgs events in "pythia_event.data" have two lepton pairs produced
0041 by the Higgs decay via Z0. At the first stage of each event, only the
0042 primary muons are tracked without tracking secondaries. then the number
0043 of hits on the muon trackers are examined. At the next stage, only
0044 the primary charged particles are tracked only inside the barrel
0045 tracking area and the isolation of the primary muons are examined.
0046 At the third stage, all particles in the RoI (Region of Interest) along
0047 the isolated muons are tracked. All these examinations are applied in
0048 RE05StackingAction.
0049
0050 5. How to start
0051
0052 - Execute RE05 in 'batch' mode from macro files
0053 % exampleRE05 exampleRE05.in
0054
0055 - Execute RE05 in 'interactive mode' with visualization
0056 % exampleRE05
0057 ....
0058 Idle> type your commands. For instance:
0059 Idle> /run/beamOn 3
0060 ....
0061 Idle> exit
