#include <GsfVertexTrackCompatibilityEstimator.h>

Inheritance diagram for GsfVertexTrackCompatibilityEstimator:

Public Types
typedef CachingVertex< 5 >::RefCountedVertexTrack	RefCountedVertexTrack

Public Types inherited from VertexTrackCompatibilityEstimator< 5 >
typedef std::pair< bool, double >	BDpair

typedef VertexTrack< N >::RefCountedLinearizedTrackState	RefCountedLinearizedTrackState

typedef CachingVertex< N >::RefCountedVertexTrack	RefCountedVertexTrack

Public Member Functions
GsfVertexTrackCompatibilityEstimator *	clone () const override

BDpair	estimate (const CachingVertex< 5 > &vrt, const RefCountedVertexTrack track, unsigned int hint=UINT_MAX) const override

BDpair	estimate (const CachingVertex< 5 > &v, const RefCountedLinearizedTrackState track, unsigned int hint=UINT_MAX) const override

BDpair	estimate (const reco::Vertex &vertex, const reco::TransientTrack &track) const override

	GsfVertexTrackCompatibilityEstimator ()

	~GsfVertexTrackCompatibilityEstimator () override

Public Member Functions inherited from VertexTrackCompatibilityEstimator< 5 >
virtual BDpair	estimate (const CachingVertex< N > &v, const RefCountedLinearizedTrackState track, unsigned int hint=UINT_MAX) const =0

virtual BDpair	estimate (const CachingVertex< N > &v, const RefCountedVertexTrack track, unsigned int hint=UINT_MAX) const =0

	VertexTrackCompatibilityEstimator ()

virtual	~VertexTrackCompatibilityEstimator ()

Private Member Functions
BDpair	estimateFittedTrack (const CachingVertex< 5 > &v, const RefCountedVertexTrack track) const

BDpair	estimateNFittedTrack (const CachingVertex< 5 > &v, const RefCountedVertexTrack track) const

Private Attributes
MultiPerigeeLTSFactory	lTrackFactory

GsfVertexUpdator	updator

VertexTrackFactory< 5 >	vTrackFactory

Detailed Description

Calculates the compatiblity of a track with respect to a vertex using the Kalman filter algorithms. The compatibility is computed from the squared standardized residuals between the track and the vertex. If track and vertex errors are Gaussian and correct, this quantity is distributed as chi**2(ndf=2)). Can be used to identify outlying tracks.

Definition at line 25 of file GsfVertexTrackCompatibilityEstimator.h.

Member Typedef Documentation

typedef CachingVertex<5>::RefCountedVertexTrack GsfVertexTrackCompatibilityEstimator::RefCountedVertexTrack

Definition at line 30 of file GsfVertexTrackCompatibilityEstimator.h.

Constructor & Destructor Documentation

GsfVertexTrackCompatibilityEstimator::GsfVertexTrackCompatibilityEstimator ( )

inline

Definition at line 32 of file GsfVertexTrackCompatibilityEstimator.h.

Referenced by clone().

32 {}

GsfVertexTrackCompatibilityEstimator::~GsfVertexTrackCompatibilityEstimator ( )

inlineoverride

Definition at line 34 of file GsfVertexTrackCompatibilityEstimator.h.

References estimate(), HiIsolationCommonParameters_cff::track, and findQualityFiles::v.

34 {}

Member Function Documentation

GsfVertexTrackCompatibilityEstimator* GsfVertexTrackCompatibilityEstimator::clone ( void ) const

inlineoverridevirtual

Clone method

Implements VertexTrackCompatibilityEstimator< 5 >.

Definition at line 54 of file GsfVertexTrackCompatibilityEstimator.h.

References estimateFittedTrack(), estimateNFittedTrack(), and GsfVertexTrackCompatibilityEstimator().

   {
     return new GsfVertexTrackCompatibilityEstimator(* this);
   }

std::pair< bool, double > GsfVertexTrackCompatibilityEstimator::estimate	(	const CachingVertex< 5 > &	vrt,
		const RefCountedVertexTrack	track,
		unsigned int	hint = `UINT_MAX`
	)		const

override

Track-to-vertex compatibility. The track weight is taken into account.

Parameters

track	The track for which the chi**2 has to be estimated.
v	The vertex against which the chi**2 has to be estimated.

Returns: The chi**2.

Definition at line 22 of file GsfVertexTrackCompatibilityEstimator.cc.

References l1t::tracks, and CachingVertex< N >::tracks().

Referenced by ~GsfVertexTrackCompatibilityEstimator().

 {
 //checking if the track passed really belongs to the vertex
   std::vector<RefCountedVertexTrack> tracks = vertex.tracks();
   std::vector<RefCountedVertexTrack>::iterator pos 
     = find_if(tracks.begin(), tracks.end(), VertexTrackEqual<5>(tr));
  if (pos != tracks.end()) {
    return estimateFittedTrack(vertex,*pos);
  } else {
    return estimateNFittedTrack(vertex,tr);
  }
 } 

std::pair< bool, double > GsfVertexTrackCompatibilityEstimator::estimate	(	const CachingVertex< 5 > &	v,
		const RefCountedLinearizedTrackState	track,
		unsigned int	hint = `UINT_MAX`
	)		const

override

Definition at line 38 of file GsfVertexTrackCompatibilityEstimator.cc.

References CachingVertex< N >::vertexState().

 {
   RefCountedVertexTrack vertexTrack = vTrackFactory.vertexTrack(track,
                          vertex.vertexState());
   return estimate(vertex, vertexTrack);
 }

std::pair< bool, double > GsfVertexTrackCompatibilityEstimator::estimate	(	const reco::Vertex &	vertex,
		const reco::TransientTrack &	track
	)		const

overridevirtual

Implements VertexTrackCompatibilityEstimator< 5 >.

Definition at line 49 of file GsfVertexTrackCompatibilityEstimator.cc.

References reco::Vertex::chi2(), reco::Vertex::covariance(), estimateFittedTrack(), spr::find(), reco::Vertex::position(), reco::TransientTrack::trackBaseRef(), reco::Vertex::tracks_begin(), and reco::Vertex::tracks_end().

 {   
 //   GlobalPoint linP(vertex.position().x(), vertex.position().z(),vertex.position().z());
     GlobalPoint linP(Basic3DVector<float> (vertex.position()));
 
   RefCountedLinearizedTrackState linTrack = 
             lTrackFactory.linearizedTrackState(linP, track);
   GlobalError err(vertex.covariance());
   VertexState vState(linP, err);
   RefCountedVertexTrack vertexTrack = vTrackFactory.vertexTrack(linTrack, vState);
 
   std::vector<RefCountedVertexTrack> initialTracks(1, vertexTrack);
   CachingVertex<5> cachingVertex(linP, err, initialTracks,
                 vertex.chi2());
   // FIXME: this should work also for tracks without a persistent ref.
 //   const TrackTransientTrack* ttt = dynamic_cast<const TrackTransientTrack*>(track.basicTransientTrack());
 //   if ((ttt!=0) && 
   if (find(vertex.tracks_begin(), vertex.tracks_end(), track.trackBaseRef()) != vertex.tracks_end())
   {
     return estimateFittedTrack(cachingVertex, vertexTrack);
   } else {
     return estimateNFittedTrack(cachingVertex, vertexTrack);
   }
 }

std::pair< bool, double > GsfVertexTrackCompatibilityEstimator::estimateFittedTrack	(	const CachingVertex< 5 > &	v,
		const RefCountedVertexTrack	track
	)		const

private

Definition at line 82 of file GsfVertexTrackCompatibilityEstimator.cc.

References estimateNFittedTrack().

Referenced by clone(), and estimate().

 {
   //remove track from the vertex using the vertex updator
   // Using the update instead of the remove methode, we can specify a weight which
   // is different than then one which the vertex track has been defined with.
   if (track->refittedStateAvailable()) return BDpair(true, track->smoothedChi2());
   throw VertexException
     ("GsfVertexTrackCompatibilityEstimator::vertex has to be smoothed.");
 
 //   CachingVertex rVert = updator.remove(v, track);
 //   RefCountedVertexTrack newSmoothedTrack = trackUpdator.update(v, track);
 //   return estimateDifference(v,rVert,newSmoothedTrack);
 }

std::pair< bool, double > GsfVertexTrackCompatibilityEstimator::estimateNFittedTrack	(	const CachingVertex< 5 > &	v,
		const RefCountedVertexTrack	track
	)		const

private

Definition at line 100 of file GsfVertexTrackCompatibilityEstimator.cc.

References CachingVertex< N >::isValid(), CachingVertex< N >::totalChiSquared(), and gsfElectronCkfTrackCandidateMaker_cff::updator.

Referenced by clone(), and estimateFittedTrack().

 {
   // Using the update instead of the add methode, we can specify a weight which
   // is different than then one which the vertex track has been defined with.
   CachingVertex<5> rVert = updator.add(v, track);
   if (!rVert.isValid()) return BDpair(false,-1.);
   return BDpair(true, rVert.totalChiSquared()-v.totalChiSquared());
 }   