Simulation particle information and kinematic state. More...

#include <acts/blob/sPHENIX/Fatras/include/ActsFatras/EventData/Particle.hpp>

Collaboration diagram for ActsFatras::Particle:

Public Types
using	Scalar = double

using	Vector3 = Acts::ActsVector< Scalar, 3 >

using	Vector4 = Acts::ActsVector< Scalar, 4 >

Public Member Functions
	Particle ()=default
	Construct a default particle with invalid identity.

	Particle (Barcode particleId, Acts::PdgParticle pdg, Scalar charge, Scalar mass)

	Particle (Barcode particleId, Acts::PdgParticle pdg)

	Particle (const Particle &)=default

	Particle (Particle &&)=default

Particle &	operator= (const Particle &)=default

Particle &	operator= (Particle &&)=default

Particle	withParticleId (Barcode particleId) const

Particle &	setProcess (ProcessType proc)
	Set the process type that generated this particle.

Particle &	setPosition4 (const Vector4 &pos4)
	Set the space-time position four-vector.

Particle &	setPosition4 (const Vector3 &position, Scalar time)
	Set the space-time position four-vector from three-position and time.

Particle &	setPosition4 (Scalar x, Scalar y, Scalar z, Scalar time)
	Set the space-time position four-vector from scalar components.

Particle &	setDirection (const Vector3 &direction)
	Set the direction three-vector.

Particle &	setDirection (Scalar dx, Scalar dy, Scalar dz)
	Set the direction three-vector from scalar components.

Particle &	setAbsMomentum (Scalar absMomentum)
	Set the absolute momentum.

Particle &	correctEnergy (Scalar delta)

constexpr Barcode	particleId () const
	Particle identifier within an event.

constexpr ProcessType	process () const
	Which type of process generated this particle.

constexpr Acts::PdgParticle	pdg () const
	PDG particle number that identifies the type.

constexpr Scalar	charge () const
	Particle charge.

constexpr Scalar	mass () const
	Particle mass.

constexpr const Vector4 &	position4 () const
	Space-time position four-vector.

auto	position () const
	Three-position, i.e. spatial coordinates without the time.

Scalar	time () const
	Time coordinate.

Vector4	momentum4 () const
	Energy-momentum four-vector.

const Vector3 &	unitDirection () const
	Unit three-direction, i.e. the normalized momentum three-vector.

Scalar	transverseMomentum () const
	Absolute momentum in the x-y plane.

constexpr Scalar	absMomentum () const
	Absolute momentum.

Scalar	energy () const
	Total energy, i.e. norm of the four-momentum.

constexpr	operator bool () const
	Check if the particle is alive, i.e. is not at rest.

constexpr bool	operator! () const
	Check if the particle is dead, i.e is at rest.

constexpr Particle &	setMaterialPassed (Scalar pathX0, Scalar pathL0)

constexpr Particle &	setMaterialLimits (Scalar limitX0, Scalar limitL0)

constexpr Scalar	pathInX0 () const
	The passed material measured in radiation lengths.

constexpr Scalar	pathInL0 () const
	The passed material measured in interaction lengths.

constexpr Scalar	pathLimitX0 () const
	The maximum radation length the particle is allowed to pass.

constexpr Scalar	pathLimitL0 () const
	The maximum interaction length the particle is allowed to pass.

Private Attributes
Barcode	m_particleId
	Particle identifier within the event.

ProcessType	m_process = ProcessType::eUndefined
	Process type specifier.

Acts::PdgParticle	m_pdg = Acts::PdgParticle::eInvalid
	PDG particle number.

Scalar	m_charge = Scalar(0)

Scalar	m_mass = Scalar(0)

Vector3	m_unitDirection = Vector3::UnitZ()

Scalar	m_absMomentum = Scalar(0)

Vector4	m_position4 = Vector4::Zero()

Scalar	m_pathX0 = Scalar(0)

Scalar	m_pathL0 = Scalar(0)

Scalar	m_limitX0 = std::numeric_limits<Scalar>::max()

Scalar	m_limitL0 = std::numeric_limits<Scalar>::max()

Detailed Description

Simulation particle information and kinematic state.

Definition at line 23 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 23 of file Particle.hpp

Member Typedef Documentation

using ActsFatras::Particle::Scalar = double

Definition at line 25 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 25 of file Particle.hpp

using ActsFatras::Particle::Vector3 = Acts::ActsVector<Scalar, 3>

Definition at line 26 of file Particle.hpp.

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

using ActsFatras::Particle::Vector4 = Acts::ActsVector<Scalar, 4>

Definition at line 27 of file Particle.hpp.

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

Constructor & Destructor Documentation

ActsFatras::Particle::Particle ( )

default

Construct a default particle with invalid identity.

ActsFatras::Particle::Particle	(	Barcode	particleId,
		Acts::PdgParticle	pdg,
		Scalar	charge,
		Scalar	mass
	)

inline

Construct a particle at rest with explicit mass and charge.

Parameters

particleId	Particle identifier within an event
pdg	PDG id
charge	Particle charge in native units
mass	Particle mass in native units

Warning: It is the users responsibility that charge and mass match the PDG particle number.

Definition at line 40 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 40 of file Particle.hpp

ActsFatras::Particle::Particle	(	Barcode	particleId,
		Acts::PdgParticle	pdg
	)

Construct a particle at rest from a PDG particle number.

Parameters

particleId	Particle identifier within an event
pdg	PDG particle number

Charge and mass are retrieved from the particle data table.

Definition at line 13 of file Particle.cpp.

View newest version in sPHENIX GitHub at line 13 of file Particle.cpp

ActsFatras::Particle::Particle ( const Particle & )

default

ActsFatras::Particle::Particle ( Particle && )

default

Member Function Documentation

constexpr Scalar ActsFatras::Particle::absMomentum ( ) const

inline

Absolute momentum.

Definition at line 155 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 155 of file Particle.hpp

References m_absMomentum.

Referenced by BOOST_DATA_TEST_CASE(), ActsExamples::ResPlotTool::fill(), ActsFatras::detail::Highland::operator()(), ActsFatras::BetheBloch::operator()(), ActsFatras::detail::GaussianMixture::operator()(), ActsFatras::detail::GeneralMixture::operator()(), ActsFatras::Casts::Pt::operator()(), ActsFatras::Casts::P::operator()(), setAbsMomentum(), and ActsFatras::ParticleSimulator< propagator_t, physics_list_t, hit_surface_selector_t >::simulate().

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constexpr Scalar ActsFatras::Particle::charge ( ) const

inline

Particle charge.

Definition at line 128 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 128 of file Particle.hpp

References m_charge.

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Particle& ActsFatras::Particle::correctEnergy ( Scalar delta )

inline

Change the energy by the given amount.

Energy loss corresponds to a negative change. If the updated energy would result in an unphysical value, the particle is put to rest, i.e. its absolute momentum is set to zero.

Definition at line 111 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 111 of file Particle.hpp

References Acts::Test::delta, m_absMomentum, and m_mass.

Referenced by ActsFatras::BetheHeitler::operator()(), and ActsFatras::BetheBloch::operator()().

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Scalar ActsFatras::Particle::energy ( ) const

inline

Total energy, i.e. norm of the four-momentum.

Definition at line 157 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 157 of file Particle.hpp

References m_absMomentum, and m_mass.

Referenced by BOOST_DATA_TEST_CASE(), momentum4(), ActsFatras::BetheHeitler::operator()(), and ActsFatras::Casts::E::operator()().

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constexpr Scalar ActsFatras::Particle::mass ( ) const

inline

Particle mass.

Definition at line 130 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 130 of file Particle.hpp

References m_mass.

Referenced by ActsFatras::detail::Highland::operator()(), ActsFatras::BetheBloch::operator()(), ActsFatras::detail::GeneralMixture::operator()(), ActsFatras::detail::GaussianMixture::operator()(), ActsFatras::operator<<(), and ActsFatras::ParticleSimulator< propagator_t, physics_list_t, hit_surface_selector_t >::simulate().

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Vector4 ActsFatras::Particle::momentum4 ( ) const

inline

Energy-momentum four-vector.

Definition at line 139 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 139 of file Particle.hpp

References Acts::eEnergy, Acts::eMom0, Acts::eMom1, Acts::eMom2, energy(), Acts::ePos0, Acts::ePos1, Acts::ePos2, m_absMomentum, and m_unitDirection.

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constexpr ActsFatras::Particle::operator bool ( ) const

inline

Check if the particle is alive, i.e. is not at rest.

Definition at line 160 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 160 of file Particle.hpp

References m_absMomentum.

constexpr bool ActsFatras::Particle::operator! ( ) const

inline

Check if the particle is dead, i.e is at rest.

Definition at line 162 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 162 of file Particle.hpp

References m_absMomentum.

Particle& ActsFatras::Particle::operator= ( const Particle & )

default

Particle& ActsFatras::Particle::operator= ( Particle && )

default

constexpr Barcode ActsFatras::Particle::particleId ( ) const

inline

Particle identifier within an event.

Definition at line 122 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 122 of file Particle.hpp

References m_particleId.

Referenced by ActsExamples::detail::CompareParticleId::operator()(), ActsExamples::detail::PrimaryVertexIdGetter::operator()(), ActsExamples::detail::SecondaryVertexIdGetter::operator()(), ActsFatras::operator<<(), and withParticleId().

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constexpr Scalar ActsFatras::Particle::pathInL0 ( ) const

inline

The passed material measured in interaction lengths.

Definition at line 185 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 185 of file Particle.hpp

References m_pathL0.

Referenced by ActsFatras::PathLimitL0::operator()(), and ActsFatras::detail::Interactor< generator_t, physics_list_t, hit_surface_selector_t >::operator()().

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constexpr Scalar ActsFatras::Particle::pathInX0 ( ) const

inline

The passed material measured in radiation lengths.

Definition at line 183 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 183 of file Particle.hpp

References m_pathX0.

Referenced by ActsFatras::PathLimitX0::operator()(), and ActsFatras::detail::Interactor< generator_t, physics_list_t, hit_surface_selector_t >::operator()().

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constexpr Scalar ActsFatras::Particle::pathLimitL0 ( ) const

inline

The maximum interaction length the particle is allowed to pass.

Definition at line 189 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 189 of file Particle.hpp

References m_limitL0.

Referenced by ActsFatras::PathLimitL0::operator()().

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constexpr Scalar ActsFatras::Particle::pathLimitX0 ( ) const

inline

The maximum radation length the particle is allowed to pass.

Definition at line 187 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 187 of file Particle.hpp

References m_limitX0.

Referenced by ActsFatras::PathLimitX0::operator()().

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constexpr Acts::PdgParticle ActsFatras::Particle::pdg ( ) const

inline

PDG particle number that identifies the type.

Definition at line 126 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 126 of file Particle.hpp

References m_pdg.

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auto ActsFatras::Particle::position ( ) const

inline

Three-position, i.e. spatial coordinates without the time.

Definition at line 135 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 135 of file Particle.hpp

References Acts::ePos0, and m_position4.

Referenced by ActsExamples::ResPlotTool::fill(), ActsFatras::Casts::Vrho::operator()(), ActsFatras::Casts::Vz::operator()(), and ActsFatras::Casts::AbsVz::operator()().

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constexpr const Vector4& ActsFatras::Particle::position4 ( ) const

inline

Space-time position four-vector.

Definition at line 133 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 133 of file Particle.hpp

References m_position4.

Referenced by ActsFatras::ParticleSimulator< propagator_t, physics_list_t, hit_surface_selector_t >::simulate().

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constexpr ProcessType ActsFatras::Particle::process ( ) const

inline

Which type of process generated this particle.

Definition at line 124 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 124 of file Particle.hpp

References m_process.

Referenced by ActsFatras::operator<<().

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Particle& ActsFatras::Particle::setAbsMomentum ( Scalar absMomentum )

inline

Set the absolute momentum.

Definition at line 102 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 102 of file Particle.hpp

References absMomentum(), and m_absMomentum.

Referenced by ActsExamples::Pythia8Generator::operator()(), ActsExamples::ParametricParticleGenerator::operator()(), and ActsExamples::CsvParticleReader::read().

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Particle& ActsFatras::Particle::setDirection ( const Vector3 & direction )

inline

Set the direction three-vector.

Definition at line 88 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 88 of file Particle.hpp

References m_unitDirection.

Referenced by ActsFatras::detail::Scattering< scattering_model_t >::operator()(), ActsExamples::Pythia8Generator::operator()(), ActsExamples::ParametricParticleGenerator::operator()(), and ActsExamples::CsvParticleReader::read().

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Particle& ActsFatras::Particle::setDirection	(	Scalar	dx,
		Scalar	dy,
		Scalar	dz
	)

inline

Set the direction three-vector from scalar components.

Definition at line 94 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 94 of file Particle.hpp

References dx, dy, dz, Acts::ePos0, Acts::ePos1, Acts::ePos2, and m_unitDirection.

constexpr Particle& ActsFatras::Particle::setMaterialLimits	(	Scalar	limitX0,
		Scalar	limitL0
	)

inline

Set the material limits.

Parameters

limitX0	maximum radiation lengths the particle can pass
limitL0	maximum interaction lengths the particle can pass

Definition at line 177 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 177 of file Particle.hpp

References m_limitL0, and m_limitX0.

constexpr Particle& ActsFatras::Particle::setMaterialPassed	(	Scalar	pathX0,
		Scalar	pathL0
	)

inline

Set the material that the particle has passed.

Parameters

pathX0	passed material measured in radiation lengths
pathL0	passed thickness measured in interaction lengths

Definition at line 168 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 168 of file Particle.hpp

References m_pathL0, and m_pathX0.

Particle& ActsFatras::Particle::setPosition4 ( const Vector4 & pos4 )

inline

Set the space-time position four-vector.

Definition at line 69 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 69 of file Particle.hpp

References m_position4, and Acts::Test::pos4().

Referenced by ActsExamples::Pythia8Generator::operator()(), ActsExamples::ParametricParticleGenerator::operator()(), and ActsExamples::CsvParticleReader::read().

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Particle& ActsFatras::Particle::setPosition4	(	const Vector3 &	position,
		Scalar	time
	)

inline

Set the space-time position four-vector from three-position and time.

Definition at line 74 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 74 of file Particle.hpp

References Acts::ePos0, Acts::eTime, m_position4, and time().

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Particle& ActsFatras::Particle::setPosition4	(	Scalar	x,
		Scalar	y,
		Scalar	z,
		Scalar	time
	)

inline

Set the space-time position four-vector from scalar components.

Definition at line 80 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 80 of file Particle.hpp

References Acts::ePos0, Acts::ePos1, Acts::ePos2, Acts::eTime, m_position4, time(), x, y, and z.

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Particle& ActsFatras::Particle::setProcess ( ProcessType proc )

inline

Set the process type that generated this particle.

Definition at line 67 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 67 of file Particle.hpp

References m_process.

Referenced by ActsExamples::CsvParticleReader::read().

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Scalar ActsFatras::Particle::time ( ) const

inline

Time coordinate.

Definition at line 137 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 137 of file Particle.hpp

References Acts::eTime, and m_position4.

Referenced by ActsExamples::ResPlotTool::fill(), and setPosition4().

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Scalar ActsFatras::Particle::transverseMomentum ( ) const

inline

Absolute momentum in the x-y plane.

Definition at line 151 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 151 of file Particle.hpp

References Acts::eMom0, m_absMomentum, and m_unitDirection.

Referenced by ActsExamples::EffPlotTool::fill(), ActsExamples::DuplicationPlotTool::fill(), ActsExamples::FakeRatePlotTool::fill(), and ActsExamples::ResPlotTool::fill().

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const Vector3& ActsFatras::Particle::unitDirection ( ) const

inline

Unit three-direction, i.e. the normalized momentum three-vector.

Definition at line 149 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 149 of file Particle.hpp

References m_unitDirection.

Referenced by ActsExamples::EffPlotTool::fill(), ActsExamples::DuplicationPlotTool::fill(), ActsExamples::FakeRatePlotTool::fill(), ActsExamples::ResPlotTool::fill(), ActsFatras::Casts::Eta::operator()(), ActsFatras::detail::Scattering< scattering_model_t >::operator()(), ActsFatras::Casts::AbsEta::operator()(), ActsFatras::Casts::Pt::operator()(), and ActsFatras::ParticleSimulator< propagator_t, physics_list_t, hit_surface_selector_t >::simulate().

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Particle ActsFatras::Particle::withParticleId ( Barcode particleId ) const

inline

Construct a new particle with a new identifier but same kinematics.

Note: This is intentionally not a regular setter. The particle id is used to identify the whole particle. Setting it on an existing particle is usually a mistake.

Definition at line 60 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 60 of file Particle.hpp

References m_particleId, p, and particleId().

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Member Data Documentation

Scalar ActsFatras::Particle::m_absMomentum = Scalar(0)

private

Definition at line 204 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 204 of file Particle.hpp

Referenced by absMomentum(), correctEnergy(), energy(), momentum4(), operator bool(), operator!(), setAbsMomentum(), and transverseMomentum().

Scalar ActsFatras::Particle::m_charge = Scalar(0)

private

Definition at line 200 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 200 of file Particle.hpp

Referenced by charge().

Scalar ActsFatras::Particle::m_limitL0 = std::numeric_limits<Scalar>::max()

private

Definition at line 217 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 217 of file Particle.hpp

Referenced by pathLimitL0(), and setMaterialLimits().

Scalar ActsFatras::Particle::m_limitX0 = std::numeric_limits<Scalar>::max()

private

Definition at line 216 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 216 of file Particle.hpp

Referenced by pathLimitX0(), and setMaterialLimits().

Scalar ActsFatras::Particle::m_mass = Scalar(0)

private

Definition at line 201 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 201 of file Particle.hpp

Referenced by correctEnergy(), energy(), and mass().

Barcode ActsFatras::Particle::m_particleId

private

Particle identifier within the event.

Definition at line 194 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 194 of file Particle.hpp

Referenced by particleId(), and withParticleId().

Scalar ActsFatras::Particle::m_pathL0 = Scalar(0)

private

Definition at line 215 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 215 of file Particle.hpp

Referenced by pathInL0(), and setMaterialPassed().

Scalar ActsFatras::Particle::m_pathX0 = Scalar(0)

private

Definition at line 214 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 214 of file Particle.hpp

Referenced by pathInX0(), and setMaterialPassed().

Acts::PdgParticle ActsFatras::Particle::m_pdg = Acts::PdgParticle::eInvalid

private

PDG particle number.

Definition at line 198 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 198 of file Particle.hpp

Referenced by pdg().

Vector4 ActsFatras::Particle::m_position4 = Vector4::Zero()

private

Definition at line 205 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 205 of file Particle.hpp

Referenced by position(), position4(), setPosition4(), and time().

ProcessType ActsFatras::Particle::m_process = ProcessType::eUndefined

private

Process type specifier.

Definition at line 196 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 196 of file Particle.hpp

Referenced by process(), and setProcess().

Vector3 ActsFatras::Particle::m_unitDirection = Vector3::UnitZ()

private

Definition at line 203 of file Particle.hpp.

View newest version in sPHENIX GitHub at line 203 of file Particle.hpp

Referenced by momentum4(), setDirection(), transverseMomentum(), and unitDirection().

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

acts/blob/sPHENIX/Fatras/include/ActsFatras/EventData/Particle.hpp
acts/blob/sPHENIX/Fatras/src/Particle.cpp

Public Types

Public Member Functions

Private Attributes

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation