KinematicConstraint Class Reference

#include <KinematicConstraint.h>

Inheritance diagram for KinematicConstraint:

Public Member Functions
virtual KinematicConstraint *	clone () const =0
virtual std::pair< AlgebraicMatrix, AlgebraicVector >	derivative (const AlgebraicVector &exPoint) const =0
virtual std::pair< AlgebraicMatrix, AlgebraicVector >	derivative (const std::vector< RefCountedKinematicParticle > &par) const =0
virtual AlgebraicVector	deviations (int nStates) const =0
	KinematicConstraint ()
virtual int	numberOfEquations () const =0
virtual std::pair< AlgebraicVector, AlgebraicVector >	value (const AlgebraicVector &exPoint) const =0
virtual std::pair< AlgebraicVector, AlgebraicVector >	value (const std::vector< RefCountedKinematicParticle > &par) const =0
virtual	~KinematicConstraint ()

Detailed Description

Pure abstract base class to implement different types of constraints for single tracks. Class caches the information about calculation of of constraint equation derivatives and values at given linearization 7-point (x,y,z,p_x,p_y,p_z,m)_0. Fitter usually takes current parameters as the first step point and the change it to the result of the first iteration.

Kirill Prokofiev, December 2002 Change for multistate refit: July 2004

Definition at line 21 of file KinematicConstraint.h.

Constructor & Destructor Documentation

KinematicConstraint()

KinematicConstraint::KinematicConstraint ( )

inline

Default constructor and destructor

Definition at line 27 of file KinematicConstraint.h.

{}

~KinematicConstraint()

virtual KinematicConstraint::~KinematicConstraint ( )

inlinevirtual

Definition at line 29 of file KinematicConstraint.h.

{}

Member Function Documentation

clone()

virtual KinematicConstraint* KinematicConstraint::clone ( ) const

pure virtual

Clone method

Implemented in FourMomentumKinematicConstraint, MassKinematicConstraint, BackToBackKinematicConstraint, PointingKinematicConstraint, SimplePointingConstraint, SmartPointingConstraint, MultipleKinematicConstraint, and MomentumKinematicConstraint.

derivative() [1/2]

virtual std::pair<AlgebraicMatrix, AlgebraicVector> KinematicConstraint::derivative ( const AlgebraicVector &  exPoint ) const

pure virtual

Implemented in BackToBackKinematicConstraint, FourMomentumKinematicConstraint, MassKinematicConstraint, MomentumKinematicConstraint, PointingKinematicConstraint, SimplePointingConstraint, SmartPointingConstraint, and MultipleKinematicConstraint.

derivative() [2/2]

virtual std::pair<AlgebraicMatrix, AlgebraicVector> KinematicConstraint::derivative ( const std::vector< RefCountedKinematicParticle > &  par ) const

pure virtual

Implemented in BackToBackKinematicConstraint, FourMomentumKinematicConstraint, MassKinematicConstraint, MomentumKinematicConstraint, PointingKinematicConstraint, SimplePointingConstraint, SmartPointingConstraint, and MultipleKinematicConstraint.

deviations()

virtual AlgebraicVector KinematicConstraint::deviations ( int  nStates ) const

pure virtual

Returns vector of sigma squared associated to the KinematicParameters of refitted particles Initial deviations are given by user for the constraining parameters (mass, momentum components etc). In case of multiple states exactly the same values are added to every particle parameters

Implemented in FourMomentumKinematicConstraint, MassKinematicConstraint, BackToBackKinematicConstraint, MultipleKinematicConstraint, MomentumKinematicConstraint, PointingKinematicConstraint, SimplePointingConstraint, and SmartPointingConstraint.

numberOfEquations()

virtual int KinematicConstraint::numberOfEquations ( ) const

pure virtual

Returns an actual number of equations in particular constraint (corresponds to the number of strings in constraint derivative matrix, for example)

Implemented in BackToBackKinematicConstraint, FourMomentumKinematicConstraint, PointingKinematicConstraint, SimplePointingConstraint, SmartPointingConstraint, MassKinematicConstraint, MomentumKinematicConstraint, and MultipleKinematicConstraint.

value() [1/2]

virtual std::pair<AlgebraicVector, AlgebraicVector> KinematicConstraint::value ( const AlgebraicVector &  exPoint ) const

pure virtual

Methods returning the constraint derivative matrix and value. The equation expansion is done at the 7-point specified by user: (x,y,z,p_x,p_y,p_z,m)_0. In case of multiple state refit vector should be of dimension 7xNumberOfStates

Implemented in BackToBackKinematicConstraint, FourMomentumKinematicConstraint, MassKinematicConstraint, MomentumKinematicConstraint, PointingKinematicConstraint, SimplePointingConstraint, SmartPointingConstraint, and MultipleKinematicConstraint.

value() [2/2]

virtual std::pair<AlgebraicVector, AlgebraicVector> KinematicConstraint::value ( const std::vector< RefCountedKinematicParticle > &  par ) const

pure virtual

Methods making value and derivative matrix using current state parameters as expansion 7-point. Constraint can be made equaly for single and multiple states

Implemented in FourMomentumKinematicConstraint, BackToBackKinematicConstraint, MomentumKinematicConstraint, PointingKinematicConstraint, SimplePointingConstraint, SmartPointingConstraint, MassKinematicConstraint, and MultipleKinematicConstraint.