Acts::NonNeutralCharge Class Reference

Charge and momentum interpretation for arbitrarily charged but not neutral particles. More...

#include <Acts/EventData/Charge.hpp>

Public Member Functions
constexpr	NonNeutralCharge (float absQ) noexcept
	Construct with the magnitude of the input charge.
constexpr	NonNeutralCharge (SinglyCharged) noexcept
	Construct from a SinglyCharged particle.
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 arbitrarily charged but not neutral particles.

Constructor & Destructor Documentation

NonNeutralCharge() [1/2]

Acts::NonNeutralCharge::NonNeutralCharge ( float absQ )

explicitconstexprnoexcept

Construct with the magnitude of the input charge.

Parameters

absQ	Absolute charge magnitude (must be positive for non-neutral particles)

NonNeutralCharge() [2/2]

Acts::NonNeutralCharge::NonNeutralCharge ( SinglyCharged )

explicitconstexprnoexcept

Construct from a SinglyCharged particle.

Member Function Documentation

absQ()

float Acts::NonNeutralCharge::absQ ( ) const

constexprnoexcept

Get the absolute charge magnitude.

Returns

Absolute charge magnitude

extractCharge()

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

constexprnoexcept

Extract the signed charge from q/p.

Parameters

qOverP

Charge over momentum

Returns

Signed charge with correct magnitude

extractMomentum()

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

constexprnoexcept

Compute q/p from momentum and signed charge.

Parameters

momentum	Particle momentum magnitude
signedQ	Signed charge (must match stored charge magnitude)

Returns

Charge over momentum