Formal class representing the A' (a dark photon) More...

#include <G4APrime.h>

Inheritance diagram for G4APrime:

Collaboration diagram for G4APrime:

Public Types
enum class	DecayMode { NoDecay = 1 , FlatDecay = 2 , GeantDecay = 3 }
	How to handle APrime decays. More...

Static Public Member Functions
static G4APrime *	APrime ()
	Accessor for APrime definition. More...

static void	Initialize (double mass, int id=62, double tau=-1.0, DecayMode decay_mode=DecayMode::NoDecay)
	Initialize the APrime particle with the passed configuration. More...

static DecayMode	getDecayMode ()
	Get the G4APrime::DecayMode that was provided to G4APrime::Initialize.

Private Member Functions
	G4APrime (const G4String &Name, G4double mass, G4double width, G4double charge, G4int iSpin, G4int iParity, G4int iConjugation, G4int iIsospin, G4int iIsospin3, G4int gParity, const G4String &pType, G4int lepton, G4int baryon, G4int encoding, G4bool stable, G4double lifetime, G4DecayTable *decaytable)
	Constructor. More...

virtual	~G4APrime ()
	Destructor. More...

Static Private Attributes
static G4APrime *	theAPrime = 0
	Reference to single particle definition of A'.

static DecayMode	decay_mode_ = G4APrime::DecayMode::NoDecay
	the G4APrime::DecayMode that was provided to G4APrime::Initialize

Detailed Description

Formal class representing the A' (a dark photon)

This class follows the standard prototype for all G4ParticleDefinitions where a static private member holds onto the single instance of this particle definition to be shared by everyone. In this case, G4APrime::Initialize needs to be called before any calls to G4APrime::G4APrime so that the simulation has a defined A' mass.

The G4APrime::Initialize call should be done in the ConstructParticle function of a physics constructor.

Member Enumeration Documentation

◆ DecayMode

enum G4APrime::DecayMode

strong

How to handle APrime decays.

Enumerator

NoDecay

No decay/stable – this is the default.

FlatDecay

Flat decay – the decay proper time will be randomly sampled from a uniform distribution whose maximum and minimum are set in the g4db::G4DarkBreMModel::GenerateChange method based on parameters of that class.

As with GeantDecay, the APrime will decay to e-/e+.

GeantDecay

Let Geant4 handle the decay.

In this case, the lifetime must be included as a parameter of the constructor.

e-/e+ is the only decay channel.

Constructor & Destructor Documentation

◆ G4APrime()

G4APrime::G4APrime	(	const G4String &	Name,
		G4double	mass,
		G4double	width,
		G4double	charge,
		G4int	iSpin,
		G4int	iParity,
		G4int	iConjugation,
		G4int	iIsospin,
		G4int	iIsospin3,
		G4int	gParity,
		const G4String &	pType,
		G4int	lepton,
		G4int	baryon,
		G4int	encoding,
		G4bool	stable,
		G4double	lifetime,
		G4DecayTable *	decaytable
	)

inlineprivate

Constructor.

Passes all parameters to the base class constructor to register this particle definition with Geant4.

Member Function Documentation

◆ APrime()

G4APrime * G4APrime::APrime ( )

static

Accessor for APrime definition.

Exceptions

std::runtime_error if the APrime is not initialized yet.

See also: Initialize for configuring and constructing the APrime at the start of a run.

◆ Initialize()

void G4APrime::Initialize	(	double	mass,
		int	id = `62`,
		double	tau = `-1.0`,
		G4APrime::DecayMode	decay_mode = `DecayMode::NoDecay`
	)

static

Initialize the APrime particle with the passed configuration.

Exceptions

std::runtime_error if the APrime has already been initialized

Parameters

[in]	mass	The mass of the APrime in MeV
[in]	id	The PDG ID number to use for the APrime particle
[in]	tau	The proper lifetime (only used if decay_mode is set to GeantDecay)
[in]	decay_mode	G4APrime::DecayMode on whether/how to decay the A'

The default value for the PDG ID is set to 62 and has been arbitrarily chosen from the range defined by 11(c) in the PDG ID numbering scheme, avoiding the already-defined "one-of-a-kind" particles using 39, 41, and 42.

Here are the properties of the formal Geant4 dark photon we define.

Property	Value
short name	A^1
mass	configured
mass width	0
electric charge	0
spin	0
parity	0
conjugation	0
isospin	0
isospin3	0
Gparity	0
long name	APrime
lepton number	0
baryon number	0
PDG ID encoding	configured
is stable (no decay)	depends on DecayMode
lifetime	depends on DecayMode
decay table	depends on DecayMode

◆ ~G4APrime()

virtual G4APrime::~G4APrime ( )

inlineprivatevirtual

Destructor.

Does nothing on purpose.

The documentation for this class was generated from the following files:

include/G4DarkBreM/G4APrime.h
src/G4DarkBreM/G4APrime.cxx

Public Types

Static Public Member Functions

Private Member Functions

Static Private Attributes