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0001 \page ExampleRE01 Example RE01
0002
0003
0004 Contact : M.Asai (SLAC)
0005
0006 ## Introduction
0007
0008 This example demonstrates how to connect the information between
0009 primary particles and hits. It also utilize some user-information
0010 classes.
0011
0012 ### Geometry and region information
0013
0014 It has a quite simple cylindrical tracker of 5 layers and a
0015 cylindrical calorimeter of lead and scintillator. Dedicated regions
0016 are assigned to both tracker and calorimeter mother volumes not
0017 for setting additional production thresholds but for adding some
0018 more information to these regions. RE01RegionInformation is the
0019 class for this purpose.
0020 A "readout geometry" is attached to the calorimeter to define
0021 its cells.
0022
0023 ### Physics
0024
0025 This example basically uses QGSP_BERT physics list. In addition
0026 to this, G4UnknownDecayPhysics is used for adding decay process to
0027 G4UnknownParticle.
0028
0029 ### Event generator
0030
0031 An event sample is attached. This event has a Higgs particle
0032 which decays into e+e- and mu+mu- pairs through two Z bosons.
0033 It uses G4HEPEvtInterface.
0034 In this example, by utilizing G4UnknownParticle, all particles
0035 appear in the primary event are converted to G4Track and then
0036 to RE01Trajectory. Relation between primary particles and track
0037 IDs are shown at the end of event execution.
0038
0039 ## "Source track" information
0040
0041 "Source track" is meant for a track that is either a primary
0042 particle or a track born is the tracking region. This information
0043 is stored in RE01TrackInformation class object and copied from
0044 a parent track to its daughters.
0045
0046 ### Track suspension
0047
0048 All source tracks are suspended for their tracking when they are
0049 getting into the calorimeter region. Thus, all tracks in the tracker
0050 region are tracked before generating any shower in the calorimeter.
0051
0052 ### Tracker hits associated with primary particle information
0053
0054 Information kept in RE01TrackInformation is used to connect each
0055 tracker hit to the primary particle.
0056
0057 ### Energy deposition of each source track
0058
0059 Utilizing RE01StackingAction, shower generation is done for each
0060 souorce track separately, and thus energy deposition in calorimeter
0061 cells are shown for each individual source track. With the trajectory
0062 information, energy deposition for each primary particle can also
0063 be gotten.
0064
