ActsFatras::BetheHeitler Struct Reference

#include <acts/blob/sPHENIX/Fatras/include/ActsFatras/Physics/ElectroMagnetic/BetheHeitler.hpp>

Public Types
using	Scalar = Particle::Scalar
using	Vector3 = Particle::Vector3

Public Member Functions
Particle	bremPhoton (const Particle &particle, Scalar gammaE, Scalar rndPsi, Scalar rndTheta1, Scalar rndTheta2, Scalar rndTheta3) const
template<typename generator_t >
std::array< Particle, 1 >	operator() (generator_t &generator, const Acts::MaterialSlab &slab, Particle &particle) const

Public Attributes
double	scaleFactor = 1.
	A scaling factor to.
bool	uniformHertzDipoleAngle = false

Detailed Description

Simulate electron energy loss using the Bethe-Heitler description.

Bethe-Heitler for electron bremsstrahlung description as described here: "A Gaussian-mixture approximation of the Bethe–Heitler model of electron energy loss by bremsstrahlung" R. Frühwirth

Definition at line 26 of file BetheHeitler.hpp.

View newest version in sPHENIX GitHub at line 26 of file BetheHeitler.hpp

Member Typedef Documentation

using ActsFatras::BetheHeitler::Scalar = Particle::Scalar

Definition at line 27 of file BetheHeitler.hpp.

View newest version in sPHENIX GitHub at line 27 of file BetheHeitler.hpp

using ActsFatras::BetheHeitler::Vector3 = Particle::Vector3

Definition at line 28 of file BetheHeitler.hpp.

View newest version in sPHENIX GitHub at line 28 of file BetheHeitler.hpp

Member Function Documentation

ActsFatras::Particle ActsFatras::BetheHeitler::bremPhoton	(	const Particle &	particle,
		Scalar	gammaE,
		Scalar	rndPsi,
		Scalar	rndTheta1,
		Scalar	rndTheta2,
		Scalar	rndTheta3
	)		const

Simulate the photon emission

Parameters

[in]	particle	The unmodified electron
[in]	gammaE	Energy of the photon
[in]	rndPsi	Random number for the azimuthal angle
[in]	rndTheta1	Random number for the polar angle
[in]	rndTheta2	Random number for the polar angle
[in]	rndTheta3	Random number for the polar angle

Definition at line 21 of file BetheHeitler.cpp.

View newest version in sPHENIX GitHub at line 21 of file BetheHeitler.cpp

References KFPMath::a, ActsFatras::Particle::direction(), Acts::eGamma, ActsFatras::Particle::energy(), ActsFatras::Particle::fourPosition(), Acts::makeCurvilinearUnitU(), ActsFatras::Barcode::makeDescendant(), ActsFatras::Particle::mass(), ActsFatras::Particle::particleId(), ActsFatras::Particle::referenceSurface(), ActsFatras::Particle::setAbsoluteMomentum(), ActsFatras::Particle::setPosition4(), ActsFatras::Particle::setProcess(), ActsFatras::Particle::setReferenceSurface(), ActsTests::PropagationDatasets::theta, physmon_ckf_tracking::u, and uniformHertzDipoleAngle.

Referenced by operator()().

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template<typename generator_t >

std::array<Particle, 1> ActsFatras::BetheHeitler::operator() ( generator_t &  generator, const Acts::MaterialSlab &  slab, Particle &  particle  ) const

inline

Simulate energy loss and update the particle parameters.

Parameters

[in]	generator	is the random number generator
[in]	slab	defines the passed material
[in,out]	particle	is the particle being updated

Returns

Produced photon.

Template Parameters

generator_t

is a RandomNumberEngine

Definition at line 57 of file BetheHeitler.hpp.

View newest version in sPHENIX GitHub at line 57 of file BetheHeitler.hpp

References ActsFatras::Particle::absoluteMomentum(), bremPhoton(), ActsFatras::Particle::correctEnergy(), ActsFatras::Particle::direction(), ActsFatras::Particle::energy(), scaleFactor, ActsFatras::Particle::setDirection(), Acts::MaterialSlab::thicknessInX0(), physmon_ckf_tracking::u, and physmon_track_finding_ttbar::z.

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Member Data Documentation

double ActsFatras::BetheHeitler::scaleFactor = 1.

A scaling factor to.

Definition at line 31 of file BetheHeitler.hpp.

View newest version in sPHENIX GitHub at line 31 of file BetheHeitler.hpp

Referenced by operator()().

bool ActsFatras::BetheHeitler::uniformHertzDipoleAngle = false

Definition at line 34 of file BetheHeitler.hpp.

View newest version in sPHENIX GitHub at line 34 of file BetheHeitler.hpp

Referenced by bremPhoton().

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

• acts/blob/sPHENIX/Fatras/include/ActsFatras/Physics/ElectroMagnetic/BetheHeitler.hpp
• acts/blob/sPHENIX/Fatras/src/Physics/BetheHeitler.cpp