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0001 \page Exampledmparticle Example dmparticle
0002
0003 Geant4 application for testing of dark matter particles and processes
0004 (based on TestEm8 and monopole examples)
0005
0006 This is very preliminary and simplified Geant4 example for light dark matter (LDM) particles.
0007 It consists of LDM bremsstrahlung process (in G4LDMPhysics constructor)
0008 for protons creating G4LDMPhotons.
0009 The latter decays creating G4LDMHi and G4LDMHiBar LDM scalar particles. They
0010 can scatter on nucleons and electrons.
0011
0012 The first version has electromagnetic processes only. Hadron constructors can be added similarly
0013 to HadrN examples.
0014
0015 More LDM processes will be added according to experiment requirements
0016
0017
0018 ## GEOMETRY DEFINITION
0019
0020 The geometry consists of a single block of a homogenous material,
0021 placed in a world.
0022
0023 Parameters define the geometry :
0024 - the material of the box
0025 - the thickness of the box
0026 - the tranverse dimension of the box
0027
0028 The default is 130 cm of tungsten.
0029 Equivalent UI commands are following:
0030 ```
0031 /testex/det/setMat G4_W
0032 /testex/det/sizeX 130 cm
0033 /testex/det/sizeYZ 30 cm
0034 ```
0035
0036 The default geometry is constructed in DetectorConstruction class,
0037 but all of the above parameters can be changed interactively via
0038 the commands defined in the DetectorMessenger class.
0039
0040 ## PHYSICS LIST
0041
0042
0043 Physics Lists include EM standard physics and decay physics, additional
0044 dark matter particle physics imlemented inside PhysicsList method. By
0045 default DMLPhoton is defined with the mass 0.5 GeV.
0046 To define different mass of this photon or enable DMLHi, DMLHiBar
0047 command line commands should be applied.
0048
0049 ## THE PRIMARY GENERATOR
0050
0051 The primary kinematic consists of a single particle which hits the
0052 block perpendicular to the input face. The type of the particle
0053 and its energy are set in the PrimaryGeneratorAction class, and can
0054 changed via the G4 build-in commands of ParticleGun class (see
0055 the macros provided with this example).
0056 The default is proton 100 GeV
0057
0058 ## HOW TO START ?
0059
0060
0061 Execute Test in 'batch' mode from macro files
0062
0063 ```
0064 % ./dmparticle dmparticle.in
0065 % ./dmparticle dmparticle.in 0.2 0.4
0066 ```
0067
0068 two extra numbers are masses in GeV of DMLPhoton and DMLHi
0069
0070 ## HISTOGRAMS
0071
0072 The result histogram:
0073 - energy deposition along the target
0074
0075 The histogram is saved in Root file.
