Acts::SinglyCharged Struct Reference

Charge and momentum interpretation for particles with +-e charge. More...

#include <Acts/EventData/Charge.hpp>

Public Member Functions
constexpr	SinglyCharged ()=default
constexpr	SinglyCharged (float absQ) noexcept
	Construct and verify the input charge magnitude (in debug builds).
constexpr float	absQ () const noexcept
	Get the absolute charge magnitude.
constexpr float	extractCharge (double qOverP) const noexcept
	Extract the signed charge from q/p.
constexpr double	extractMomentum (double qOverP) const noexcept
	Extract momentum magnitude from q/p.
constexpr double	qOverP (double momentum, float signedQ) const noexcept
	Compute q/p from momentum and signed charge.

Detailed Description

Charge and momentum interpretation for particles with +-e charge.

Constructor & Destructor Documentation

SinglyCharged() [1/2]

Acts::SinglyCharged::SinglyCharged ( )

constexprdefault

SinglyCharged() [2/2]

Acts::SinglyCharged::SinglyCharged ( float absQ )

explicitconstexprnoexcept

Construct and verify the input charge magnitude (in debug builds).

This constructor is only provided to allow consistent construction.

Parameters

absQ	Absolute charge magnitude (must be e for singly charged particles)

Member Function Documentation

absQ()

float Acts::SinglyCharged::absQ ( ) const

constexprnoexcept

Get the absolute charge magnitude.

Returns

Elementary charge magnitude e

extractCharge()

float Acts::SinglyCharged::extractCharge ( double qOverP ) const

constexprnoexcept

Extract the signed charge from q/p.

Parameters

qOverP

Charge over momentum

Returns

Signed elementary charge (+e or -e)

extractMomentum()

double Acts::SinglyCharged::extractMomentum ( double qOverP ) const

constexprnoexcept

Extract momentum magnitude from q/p.

Parameters

qOverP

Charge over momentum

Returns

Momentum magnitude calculated as charge/qOverP

qOverP()

double Acts::SinglyCharged::qOverP ( double momentum, float signedQ ) const

constexprnoexcept

Compute q/p from momentum and signed charge.

Parameters

momentum	Particle momentum magnitude
signedQ	Signed charge (must be ±e)

Returns

Charge over momentum