#include <KinematicConstrainedVertexFitter.h>

Public Member Functions
RefCountedKinematicTree	fit (const std::vector< RefCountedKinematicParticle > &part)

RefCountedKinematicTree	fit (const std::vector< RefCountedKinematicParticle > &part, MultiTrackKinematicConstraint *cs)

RefCountedKinematicTree	fit (const std::vector< RefCountedKinematicParticle > &part, MultiTrackKinematicConstraint cs, GlobalPoint pt)

float	getCSum () const

int	getNit () const

	KinematicConstrainedVertexFitter ()

	KinematicConstrainedVertexFitter (const LinearizationPointFinder &fnd)

void	setParameters (const edm::ParameterSet &pSet)

	~KinematicConstrainedVertexFitter ()

Private Member Functions
void	defaultParameters ()

Private Attributes
float	csum

LinearizationPointFinder *	finder

int	iterations

ConstrainedTreeBuilder *	tBuilder

float	theMaxDelta

float	theMaxReducedChiSq

int	theMaxStep

float	theMinChiSqImprovement

KinematicConstrainedVertexUpdator *	updator

VertexKinematicConstraint *	vCons

Detailed Description

Class fitting the veretx out of set of tracks via usual LMS with Lagrange multipliers. Additional constraints can be applyed to the tracks during the vertex fit (solves non-factorizabele cases). Since the vertex constraint is included by default, do not add a separate VertexKinematicConstraint! Example: Vertex fit with collinear tracks..

Definition at line 21 of file KinematicConstrainedVertexFitter.h.

Constructor & Destructor Documentation

KinematicConstrainedVertexFitter::KinematicConstrainedVertexFitter ( )

Default constructor using LMSLinearizationPointFinder

Definition at line 9 of file KinematicConstrainedVertexFitter.cc.

KinematicConstrainedVertexFitter::KinematicConstrainedVertexFitter ( const LinearizationPointFinder & fnd )

Constructor with user-provided LinearizationPointFinder

Definition at line 20 of file KinematicConstrainedVertexFitter.cc.

KinematicConstrainedVertexFitter::~KinematicConstrainedVertexFitter ( )

Definition at line 31 of file KinematicConstrainedVertexFitter.cc.

Member Function Documentation

void KinematicConstrainedVertexFitter::defaultParameters ( )

private

Definition at line 47 of file KinematicConstrainedVertexFitter.cc.

RefCountedKinematicTree KinematicConstrainedVertexFitter::fit ( const std::vector< RefCountedKinematicParticle > & part )

inline

Without additional constraint, this will perform a simple vertex fit using LMS with Lagrange multipliers method.

Definition at line 48 of file KinematicConstrainedVertexFitter.h.

Referenced by fit().

                                                                                  {
    return fit(part, 0, 0);
  }

RefCountedKinematicTree KinematicConstrainedVertexFitter::fit	(	const std::vector< RefCountedKinematicParticle > &	part,
		MultiTrackKinematicConstraint *	cs
	)

inline

LMS with Lagrange multipliers fit of vertex constraint and user-specified constraint.

Definition at line 55 of file KinematicConstrainedVertexFitter.h.

References fit().

                                                                 {
    return fit(part, cs, 0);
  };

RefCountedKinematicTree KinematicConstrainedVertexFitter::fit	(	const std::vector< RefCountedKinematicParticle > &	part,
		MultiTrackKinematicConstraint *	cs,
		GlobalPoint *	pt
	)