#include <KalmanVertexTrackUpdator.h>

Inheritance diagram for KalmanVertexTrackUpdator< N >:

Public Types
typedef ROOT::Math::SMatrix < double, 3, N-2, ROOT::Math::MatRepStd< double, 3, N-2 > >	AlgebraicMatrix3M
typedef ROOT::Math::SMatrix < double, N+1, N+1, ROOT::Math::MatRepSym< double, N+1 > >	AlgebraicSymMatrixOO
typedef VertexTrack< N > ::RefCountedLinearizedTrackState	RefCountedLinearizedTrackState
typedef VertexTrack< N > ::RefCountedRefittedTrackState	RefCountedRefittedTrackState
typedef CachingVertex< N > ::RefCountedVertexTrack	RefCountedVertexTrack
typedef std::pair < RefCountedRefittedTrackState, AlgebraicSymMatrixOO >	trackMatrixPair
Public Member Functions
KalmanVertexTrackUpdator< N > *	clone () const
	KalmanVertexTrackUpdator ()
trackMatrixPair	trackRefit (const VertexState &vertex, RefCountedLinearizedTrackState linTrackState, float weight) const
RefCountedVertexTrack	update (const CachingVertex< N > &vertex, RefCountedVertexTrack track) const
virtual	~KalmanVertexTrackUpdator ()
Private Attributes
KVFHelper< N >	helper
VertexTrackFactory< N >	theVTFactory
KalmanVertexUpdator< N >	updator

Detailed Description

template<unsigned int N>
class KalmanVertexTrackUpdator< N >

Performs the refit of the tracks with the vertex constraint, using the Kalman filter algorithms.

Definition at line 17 of file KalmanVertexTrackUpdator.h.

Member Typedef Documentation

template<unsigned int N>

typedef ROOT::Math::SMatrix<double,3,N-2,ROOT::Math::MatRepStd<double,3,N-2> > KalmanVertexTrackUpdator< N >::AlgebraicMatrix3M

Definition at line 55 of file KalmanVertexTrackUpdator.h.

template<unsigned int N>

typedef ROOT::Math::SMatrix<double,N+1,N+1,ROOT::Math::MatRepSym<double,N+1> > KalmanVertexTrackUpdator< N >::AlgebraicSymMatrixOO

Definition at line 56 of file KalmanVertexTrackUpdator.h.

template<unsigned int N>

typedef VertexTrack<N>::RefCountedLinearizedTrackState KalmanVertexTrackUpdator< N >::RefCountedLinearizedTrackState

Definition at line 22 of file KalmanVertexTrackUpdator.h.

template<unsigned int N>

typedef VertexTrack<N>::RefCountedRefittedTrackState KalmanVertexTrackUpdator< N >::RefCountedRefittedTrackState

Definition at line 23 of file KalmanVertexTrackUpdator.h.

template<unsigned int N>

typedef CachingVertex<N>::RefCountedVertexTrack KalmanVertexTrackUpdator< N >::RefCountedVertexTrack

Definition at line 21 of file KalmanVertexTrackUpdator.h.

template<unsigned int N>

typedef std::pair< RefCountedRefittedTrackState, AlgebraicSymMatrixOO > KalmanVertexTrackUpdator< N >::trackMatrixPair

Definition at line 57 of file KalmanVertexTrackUpdator.h.

Constructor & Destructor Documentation

template<unsigned int N>

KalmanVertexTrackUpdator< N >::KalmanVertexTrackUpdator ( ) [inline]

Default constructor

Definition at line 30 of file KalmanVertexTrackUpdator.h.

Referenced by KalmanVertexTrackUpdator< 5 >::clone().

{}

template<unsigned int N>

virtual KalmanVertexTrackUpdator< N >::~KalmanVertexTrackUpdator ( ) [inline, virtual]

Definition at line 32 of file KalmanVertexTrackUpdator.h.

{}

Member Function Documentation

template<unsigned int N>

KalmanVertexTrackUpdator<N>* KalmanVertexTrackUpdator< N >::clone ( void ) const [inline, virtual]

Clone method

Implements VertexTrackUpdator< N >.

Definition at line 50 of file KalmanVertexTrackUpdator.h.

  {
    return new KalmanVertexTrackUpdator(*this);
  }

template<unsigned int N>

trackMatrixPair KalmanVertexTrackUpdator< N >::trackRefit	(	const VertexState &	vertex,
		RefCountedLinearizedTrackState	linTrackState,
		float	weight
	)		const

Refit of the track with the vertex constraint.

Parameters:

vertex	The vertex which has to be used as constraint.
track	The track to refit.

Returns:: The refitted state with the track-to-vertex covariance.

Referenced by GsfVertexSmoother::createNewComponent().

template<unsigned int N>

CachingVertex< N >::RefCountedVertexTrack KalmanVertexTrackUpdator< N >::update	(	const CachingVertex< N > &	vertex,
		RefCountedVertexTrack	track
	)		const

Refit of the track with the vertex constraint.

Parameters:

vertex	The vertex which has to be used as constraint.
track	The track to refit.

Returns:: The VertexTrack containing the refitted track and the track-to-vertex covariance.

Definition at line 12 of file KalmanVertexTrackUpdator.cc.

References query::result, ExpressReco_HICollisions_FallBack::updator, and CachingVertex< N >::vertexState().

{
  trackMatrixPair thePair = 
        trackRefit(vertex.vertexState(), track->linearizedTrack(), track->weight() );

  VertexState rVert = updator.positionUpdate (vertex.vertexState(), track->linearizedTrack(),
                        track->weight(), -1);

  std::pair<bool, double> result = helper.trackParameterChi2(track->linearizedTrack(), thePair.first);
  float smoothedChi2 = helper.vertexChi2(rVert, vertex.vertexState()) + result.second;

  return theVTFactory.vertexTrack(track->linearizedTrack(),
        vertex.vertexState(), thePair.first, smoothedChi2, thePair.second,
        track->weight());
}