Collection of configuration parameters for the doublet seed finder. More...

#include <Acts/Seeding2/DoubletSeedFinder.hpp>

Inheritance diagram for Acts::DoubletSeedFinder::Config:

Collaboration diagram for Acts::DoubletSeedFinder::Config:

Public Types
using	ExperimentCuts
	Type alias for delegate to apply experiment specific cuts during doublet finding.

Public Attributes
Direction	candidateDirection = Direction::Forward()
	Direction of the doublet candidate space points.
float	collisionRegionMax = +150 * UnitConstants::mm
	Maximum collision region boundary in z-axis for doublet origin checks.
float	collisionRegionMin = -150 * UnitConstants::mm
	Limiting location of collision region in z-axis used to check if doublet origin is within reasonable bounds.
float	cotThetaMax = 10.01788
	Maximum allowed cotTheta between two space-points in doublet, used to check if forward angle is within bounds.
float	deltaRMax = 270 * UnitConstants::mm
	Maximum radial distance between two doublet components.
float	deltaRMin = 5 * UnitConstants::mm
	Minimum radial distance between two doublet components.
float	deltaZMax = std::numeric_limits<float>::infinity()
	Maximum z distance between two doublet components.
float	deltaZMin = -std::numeric_limits<float>::infinity()
	Minimal z distance between two doublet components.
ExperimentCuts	experimentCuts
	Delegate to apply experiment specific cuts during doublet finding.
float	helixCutTolerance = 1
	Parameter which can loosen the tolerance of the track seed to form a helix.
float	impactMax = 20 * UnitConstants::mm
	Maximum value of impact parameter estimation of the seed candidates.
bool	interactionPointCut = false
	Enable cut on the compatibility between interaction point and doublet, this is an useful approximation to speed up the seeding.
float	minPt = 400 * UnitConstants::MeV
	Minimum transverse momentum (pT) used to check the r-z slope compatibility of triplets with maximum multiple scattering effect (produced by the minimum allowed pT particle) + a certain uncertainty term.
bool	spacePointsSortedByRadius = false
	Whether the input space points are sorted by radius.

Detailed Description

Collection of configuration parameters for the doublet seed finder.

This includes doublet cuts, steering switches, and assumptions about the space points.

Member Typedef Documentation

◆ ExperimentCuts

using Acts::DoubletSeedFinder::Config::ExperimentCuts

Initial value:

 
        Delegate<bool(const ConstSpacePointProxy2& ,
                      const ConstSpacePointProxy2& ,
                      float , bool )>

Type alias for delegate to apply experiment specific cuts during doublet finding.

Member Data Documentation

◆ candidateDirection

Direction Acts::DoubletSeedFinder::Config::candidateDirection = Direction::Forward()

Direction of the doublet candidate space points.

Either forward, also called top doublet, or backward, also called bottom doublet.

◆ helixCutTolerance

float Acts::DoubletSeedFinder::Config::helixCutTolerance = 1

Parameter which can loosen the tolerance of the track seed to form a helix.

This is useful for e.g. misaligned seeding.

◆ minPt

float Acts::DoubletSeedFinder::Config::minPt = 400 * UnitConstants::MeV

Minimum transverse momentum (pT) used to check the r-z slope compatibility of triplets with maximum multiple scattering effect (produced by the minimum allowed pT particle) + a certain uncertainty term.

Check the documentation for more information https://acts.readthedocs.io/en/latest/core/reconstruction/pattern_recognition/seeding.html

Public Types