Import Geant4 11.0.0 source tree

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+///\file "exoticphysics/dmparticle/.README.txt"
+///\brief Example dmparticle README page
+
+/*! \page Exampledmparticle Example dmparticle
+
+This is very preliminary and simplified Geant4 example for light dark matter (LDM) particles. 
+It consists of LDM bremsstrahlung process (in G4LDMPhysics constructor) 
+for protons creating G4LDMPhotons. 
+The latter decays creating G4LDMHi and G4LDMHiBar LDM scalar particles. They 
+can scatter on nucleons and electrons. 
+
+The first version has electromagnetic processes only. Hadron constructors can be added similarly 
+to HadrN examples.
+
+More LDM processes will be added according to experiment requirements
+
+	
+\section dmparticle_s1 GEOMETRY DEFINITION
+ 
+ The geometry consists of a single block of a homogenous material,
+ placed in a world.
+
+ Parameters define the geometry :
+ - the material of the box 
+ - the thickness of the box 
+ - the tranverse dimension of the box 
+
+ The default is 130 cm of tungsten.
+ Equivalent UI commands are following:
+\verbatim
+/testex/det/setMat G4_W
+/testex/det/sizeX  130 cm
+/testex/det/sizeYZ  30 cm
+\endverbatim
+
+ The default geometry is constructed in DetectorConstruction class,
+ but all of the above parameters can be changed interactively via
+ the commands defined in the DetectorMessenger class. 
+
+\section dmparticle_s2  PHYSICS LIST
+ 
+
+ Physics Lists include EM standard physics and decay physics, additional 
+ dark matter particle physics imlemented inside PhysicsList method. By
+ default DMLPhoton is defined with the mass 0.5 GeV.
+ To define different mass of this photon or enable DMLHi, DMLHiBar
+ command line commands should be applied.
+
+\section dmparticle_s3 THE PRIMARY GENERATOR
+
+ The primary kinematic consists of a single particle which hits the
+ block perpendicular to the input face. The type of the particle
+ and its energy are set in the PrimaryGeneratorAction class, and can
+ changed via the G4 build-in commands of ParticleGun class (see
+ the macros provided with this example).
+ The default is proton 100 GeV
+
+\section dmparticle_s5- HOW TO START ?
+ 
+
+ Execute Test  in 'batch' mode from macro files
+
+\verbatim
+% dmparticle dmparticle.in
+% dmparticle dmparticle.in 0.2 0.4
+\endverbatim
+
+ two extra numbers are masses in GeV of DMLPhoton and DMLHi
+*/
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+-------------------------------------------------------------------
+
+     =========================================================
+     Geant4 - an Object-Oriented Toolkit for Simulation in HEP
+     =========================================================
+
+                            dmparticle  
+                            ----------
+
+                       V. Grichine (25.03.2017)
+
+    Geant4 application for testing of dark matter particles and processes 
+                      (based on TestEm8 and monopole examples)
+
+This is very preliminary and simplified Geant4 example for light dark matter (LDM) particles. 
+It consists of LDM bremsstrahlung process (in G4LDMPhysics constructor) 
+for protons creating G4LDMPhotons. 
+The latter decays creating G4LDMHi and G4LDMHiBar LDM scalar particles. They 
+can scatter on nucleons and electrons. 
+
+The first version has electromagnetic processes only. Hadron constructors can be added similarly 
+to HadrN examples.
+
+More LDM processes will be added according to experiment requirements
+
+
+
+ 1- GEOMETRY DEFINITION
+
+     The geometry consists of a single block of a homogenous material,
+     placed in a world.
+
+     Parameters define the geometry :
+ 	- the material of the box 
+	- the thickness of the box 
+	- the tranverse dimension of the box 
+
+     The default is 130 cm of tungsten.
+     Equivalent UI commands are following:
+        /testex/det/setMat G4_W
+        /testex/det/sizeX  130 cm
+        /testex/det/sizeYZ  30 cm
+
+     The default geometry is constructed in DetectorConstruction class,
+     but all of the above parameters can be changed interactively via
+     the commands defined in the DetectorMessenger class. 
+
+ 2- PHYSICS LIST
+
+    Physics Lists include EM standard physics and decay physics, additional 
+    dark matter particle physics imlemented inside PhysicsList method. By
+    default DMLPhoton is defined with the mass 0.5 GeV.
+    To define different mass of this photon or enable DMLHi, DMLHiBar
+    command line commands should be applied.
+
+ 3- AN EVENT : THE PRIMARY GENERATOR
+
+     The primary kinematic consists of a single particle which hits the
+     block perpendicular to the input face. The type of the particle
+     and its energy are set in the PrimaryGeneratorAction class, and can
+     changed via the G4 build-in commands of ParticleGun class (see
+     the macros provided with this example).
+     The default is proton 100 GeV
+
+ 4- HOW TO START ?
+
+     - execute Test  in 'batch' mode from macro files
+ 	% dmparticle dmparticle.in
+ 	% dmparticle dmparticle.in 0.2 0.4
+
+     two extra numbers are masses in GeV of DMLPhoton and DMLHi
+
+ 5- HISTOGRAMS
+
+     The result is five histograms:
+				- energy deposition along the target
+
+     The histogram is saved in Root file.
+