SimplePointingConstraint Class Reference

#include <SimplePointingConstraint.h>

Inheritance diagram for SimplePointingConstraint:

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

Private Member Functions
std::pair< AlgebraicMatrix, AlgebraicVector >	makeDerivative (const AlgebraicVector &exPoint) const
std::pair< AlgebraicVector, AlgebraicVector >	makeValue (const AlgebraicVector &exPoint) const

Private Attributes
GlobalPoint	refPoint

Detailed Description

Topological constraint making a momentum vector to point to the given location in space. Example: if b-meson momentum is reconstructed at b-meson decay position (secondary vertex), making reconstructed momentum pointing the the primary vertex

Multiple track refit is not supported in current version

Kirill Prokofiev, March 2004 MultiState version: July 2004

Definition at line 21 of file SimplePointingConstraint.h.

Constructor & Destructor Documentation

SimplePointingConstraint::SimplePointingConstraint ( const GlobalPoint &  ref )

inline

Definition at line 25 of file SimplePointingConstraint.h.

Referenced by clone().

                                                  :refPoint(ref)
  {}

Member Function Documentation

virtual SimplePointingConstraint* SimplePointingConstraint::clone ( ) const

inlinevirtual

Clone method

Implements KinematicConstraint.

Definition at line 53 of file SimplePointingConstraint.h.

References SimplePointingConstraint().

 {return new SimplePointingConstraint(*this);}

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

virtual

Implements KinematicConstraint.

Definition at line 25 of file SimplePointingConstraint.cc.

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

virtual

Vector of values and matrix of derivatives calculated using current state parameters as expansion point

Implements KinematicConstraint.

Definition at line 43 of file SimplePointingConstraint.cc.

AlgebraicVector SimplePointingConstraint::deviations ( int  nStates ) const

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

Implements KinematicConstraint.

Definition at line 75 of file SimplePointingConstraint.cc.

std::pair< AlgebraicMatrix, AlgebraicVector > SimplePointingConstraint::makeDerivative ( const AlgebraicVector &  exPoint ) const

private

Definition at line 120 of file SimplePointingConstraint.cc.

std::pair< AlgebraicVector, AlgebraicVector > SimplePointingConstraint::makeValue ( const AlgebraicVector &  exPoint ) const

private

Definition at line 81 of file SimplePointingConstraint.cc.

int SimplePointingConstraint::numberOfEquations ( ) const

virtual

Returns number of constraint equations used for fitting. Method is relevant for proper NDF calculations.

Implements KinematicConstraint.

Definition at line 78 of file SimplePointingConstraint.cc.

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

virtual

Vector of values and matrix of derivatives calculated at given expansion 7xNumberOfStates point

Implements KinematicConstraint.

Definition at line 5 of file SimplePointingConstraint.cc.

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

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

Implements KinematicConstraint.

Definition at line 60 of file SimplePointingConstraint.cc.

Member Data Documentation

GlobalPoint SimplePointingConstraint::refPoint

private

Definition at line 61 of file SimplePointingConstraint.h.