Acts::NeutralParticleHypothesis Class Reference

Specialized particle hypothesis for neutral particles. More...

#include <Acts/EventData/ParticleHypothesis.hpp>

Inheritance diagram for Acts::NeutralParticleHypothesis:

Collaboration diagram for Acts::NeutralParticleHypothesis:

Public Member Functions
template<typename other_charge_t>
constexpr	NeutralParticleHypothesis (const GenericParticleHypothesis< other_charge_t > &other)
	Convert from another particle hypothesis with different charge type.
	NeutralParticleHypothesis (PdgParticle absPdg)
	Constructor with PDG particle code (mass from particle data table).
constexpr	NeutralParticleHypothesis (PdgParticle absPdg, float mass)
	Constructor with explicit mass.
Public Member Functions inherited from Acts::GenericParticleHypothesis< Neutral >
constexpr	GenericParticleHypothesis (PdgParticle absPdg, float mass, ChargeType chargeType)
	Creates a particle hypothesis using absolute PDG, mass and the charge type.
constexpr float	absoluteCharge () const noexcept
	Get the hypothesized absolute charge.
constexpr PdgParticle	absolutePdg () const noexcept
	Get the hypothesized absolute PDG.
constexpr const ChargeType &	chargeType () const noexcept
	Get the hypothesized charge type.
constexpr auto	extractCharge (T qOverP) const noexcept
	Extracts the signed charge from the q over p track parameter using the charge hypothesis.
constexpr auto	extractMomentum (T qOverP) const noexcept
	Extracts the particle momentum from the q over p track parameter using the charge hypothesis.
constexpr float	mass () const noexcept
	Get the hypothesized mass.
constexpr auto	qOverP (P momentum, Q signedQ) const noexcept
	Calculate the q over p track parameter with the given absolute momentum and charge.
std::ostream &	toStream (std::ostream &os) const
	Output stream representation of the particle hypothesis.

Static Public Member Functions
static NeutralParticleHypothesis	geantino ()
	Create a neutral geantino particle hypothesis (massless neutral particle).
static NeutralParticleHypothesis	photon ()
	Create a photon particle hypothesis.
static NeutralParticleHypothesis	pion0 ()
	Create a neutral pion particle hypothesis.

Additional Inherited Members
Public Types inherited from Acts::GenericParticleHypothesis< Neutral >
using	ChargeType
	Type alias for charge type used in particle hypothesis.

Detailed Description

Specialized particle hypothesis for neutral particles.

Note

This serves as a factory for common neutral particles.

Constructor & Destructor Documentation

NeutralParticleHypothesis() [1/3]

Acts::NeutralParticleHypothesis::NeutralParticleHypothesis ( PdgParticle absPdg, float mass )

constexpr

Constructor with explicit mass.

Parameters

absPdg	The absolute PDG particle code
mass	The particle mass

NeutralParticleHypothesis() [2/3]

Acts::NeutralParticleHypothesis::NeutralParticleHypothesis ( PdgParticle absPdg )

explicit

Constructor with PDG particle code (mass from particle data table).

Parameters

absPdg

The absolute PDG particle code

NeutralParticleHypothesis() [3/3]

template<typename other_charge_t>

Acts::NeutralParticleHypothesis::NeutralParticleHypothesis ( const GenericParticleHypothesis< other_charge_t > & other )

explicitconstexpr

Convert from another particle hypothesis with different charge type.

Parameters

other

The source particle hypothesis to convert from

Member Function Documentation

geantino()

NeutralParticleHypothesis Acts::NeutralParticleHypothesis::geantino ( )

static

Create a neutral geantino particle hypothesis (massless neutral particle).

Returns

Neutral geantino particle hypothesis

photon()

NeutralParticleHypothesis Acts::NeutralParticleHypothesis::photon ( )

static

Create a photon particle hypothesis.

Returns

Neutral photon particle hypothesis

pion0()

NeutralParticleHypothesis Acts::NeutralParticleHypothesis::pion0 ( )

static

Create a neutral pion particle hypothesis.

Returns

Neutral pion particle hypothesis