#include <TrackAssociatorByChi2.h>

Inheritance diagram for TrackAssociatorByChi2:

Public Types
typedef std::map< double, SimTrack >	Chi2SimMap

typedef std::pair< reco::Track, Chi2SimMap >	RecoToSimPair

typedef std::vector < RecoToSimPair >	RecoToSimPairAssociation

Public Member Functions
reco::GenToRecoCollection	associateGenToReco (const edm::RefToBaseVector< reco::Track > &, const edm::RefVector< reco::GenParticleCollection > &, const edm::Event event=0, const edm::EventSetup setup=0) const
	Association Sim To Reco with Collections (Gen Particle version) More...

virtual reco::GenToRecoCollection	associateGenToReco (edm::Handle< edm::View< reco::Track > > &tCH, edm::Handle< reco::GenParticleCollection > &tPCH, const edm::Event event=0, const edm::EventSetup setup=0) const
	compare reco to sim the handle of reco::Track and GenParticle collections More...

reco::RecoToGenCollection	associateRecoToGen (const edm::RefToBaseVector< reco::Track > &, const edm::RefVector< reco::GenParticleCollection > &, const edm::Event event=0, const edm::EventSetup setup=0) const
	Association Sim To Reco with Collections (Gen Particle version) More...

virtual reco::RecoToGenCollection	associateRecoToGen (edm::Handle< edm::View< reco::Track > > &tCH, edm::Handle< reco::GenParticleCollection > &tPCH, const edm::Event event=0, const edm::EventSetup setup=0) const
	compare reco to sim the handle of reco::Track and GenParticle collections More...

double	associateRecoToSim (reco::TrackCollection::const_iterator, TrackingParticleCollection::const_iterator, const reco::BeamSpot &) const
	compare reco::TrackCollection and TrackingParticleCollection iterators: returns the chi2 More...

virtual reco::RecoToSimCollection	associateRecoToSim (const edm::RefToBaseVector< reco::Track > &, const edm::RefVector< TrackingParticleCollection > &, const edm::Event event=0, const edm::EventSetup setup=0) const override
	Association Reco To Sim with Collections. More...

virtual reco::RecoToSimCollection	associateRecoToSim (edm::Handle< edm::View< reco::Track > > &tCH, edm::Handle< TrackingParticleCollection > &tPCH, const edm::Event event=0, const edm::EventSetup setup=0) const override
	compare reco to sim the handle of reco::Track and TrackingParticle collections More...

virtual reco::SimToRecoCollection	associateSimToReco (const edm::RefToBaseVector< reco::Track > &, const edm::RefVector< TrackingParticleCollection > &, const edm::Event event=0, const edm::EventSetup setup=0) const override
	Association Sim To Reco with Collections. More...

virtual reco::SimToRecoCollection	associateSimToReco (edm::Handle< edm::View< reco::Track > > &tCH, edm::Handle< TrackingParticleCollection > &tPCH, const edm::Event event=0, const edm::EventSetup setup=0) const override
	compare reco to sim the handle of reco::Track and TrackingParticle collections More...

double	compareTracksParam (reco::TrackCollection::const_iterator, edm::SimTrackContainer::const_iterator, const math::XYZTLorentzVectorD &, const GlobalVector &, const reco::TrackBase::CovarianceMatrix &, const reco::BeamSpot &) const
	compare reco::TrackCollection and edm::SimTrackContainer iterators: returns the chi2 More...

RecoToSimPairAssociation	compareTracksParam (const reco::TrackCollection &, const edm::SimTrackContainer &, const edm::SimVertexContainer &, const reco::BeamSpot &) const
	compare collections reco to sim More...

double	getChi2 (reco::TrackBase::ParameterVector &rParameters, reco::TrackBase::CovarianceMatrix &recoTrackCovMatrix, Basic3DVector< double > &momAtVtx, Basic3DVector< double > &vert, int &charge, const reco::BeamSpot &) const
	basic method where chi2 is computed More...

std::pair< bool, reco::TrackBase::ParameterVector >	parametersAtClosestApproach (const Basic3DVector< double > &, const Basic3DVector< double > &, float, const reco::BeamSpot &) const
	propagate the track parameters of TrackinParticle from production vertex to the point of closest approach to the beam line. More...

	TrackAssociatorByChi2 (const edm::ESHandle< MagneticField > mF, const edm::ParameterSet &conf)
	Constructor with PSet. More...

	TrackAssociatorByChi2 (const edm::ESHandle< MagneticField > mF, double chi2Cut, bool onlyDiag, const edm::InputTag &beamspotSrc)
	Constructor with magnetic field, double, bool and InputTag. More...

	~TrackAssociatorByChi2 ()
	Destructor. More...

Public Member Functions inherited from TrackAssociatorBase
virtual reco::RecoToSimCollectionSeed	associateRecoToSim (edm::Handle< edm::View< TrajectorySeed > > &, edm::Handle< TrackingParticleCollection > &, const edm::Event event, const edm::EventSetup setup) const

virtual reco::RecoToSimCollectionTCandidate	associateRecoToSim (edm::Handle< TrackCandidateCollection > &, edm::Handle< TrackingParticleCollection > &, const edm::Event event, const edm::EventSetup setup) const

virtual reco::SimToRecoCollectionSeed	associateSimToReco (edm::Handle< edm::View< TrajectorySeed > > &, edm::Handle< TrackingParticleCollection > &, const edm::Event event, const edm::EventSetup setup) const

virtual reco::SimToRecoCollectionTCandidate	associateSimToReco (edm::Handle< TrackCandidateCollection > &, edm::Handle< TrackingParticleCollection > &, const edm::Event event, const edm::EventSetup setup) const

	TrackAssociatorBase ()
	Constructor. More...

virtual	~TrackAssociatorBase ()
	Destructor. More...

Private Attributes
edm::InputTag	bsSrc

double	chi2cut

bool	onlyDiagonal

edm::ESHandle< MagneticField >	theMF

Detailed Description

Class that performs the association of reco::Tracks and TrackingParticles evaluating the chi2 of reco tracks parameters and sim tracks parameters. The cut can be tuned from the config file: see data/TrackAssociatorByChi2.cfi. Note that the Association Map is filled with -ch2 and not chi2 because it is ordered using std::greater: the track with the lowest association chi2 will be the first in the output map.It is possible to use only diagonal terms (associator by pulls) seeting onlyDiagonal = true in the PSet

Author: cerati, magni

Definition at line 40 of file TrackAssociatorByChi2.h.

Member Typedef Documentation

typedef std::map<double, SimTrack> TrackAssociatorByChi2::Chi2SimMap

Definition at line 43 of file TrackAssociatorByChi2.h.

typedef std::pair< reco::Track, Chi2SimMap> TrackAssociatorByChi2::RecoToSimPair

Definition at line 44 of file TrackAssociatorByChi2.h.

typedef std::vector< RecoToSimPair > TrackAssociatorByChi2::RecoToSimPairAssociation

Definition at line 45 of file TrackAssociatorByChi2.h.

Constructor & Destructor Documentation

TrackAssociatorByChi2::TrackAssociatorByChi2	(	const edm::ESHandle< MagneticField >	mF,
		const edm::ParameterSet &	conf
	)

inline

Constructor with PSet.

Definition at line 48 of file TrackAssociatorByChi2.h.

References onlyDiagonal, and theMF.

                                                                                          :
     chi2cut(conf.getParameter<double>("chi2cut")),
     onlyDiagonal(conf.getParameter<bool>("onlyDiagonal")),
     bsSrc(conf.getParameter<edm::InputTag>("beamSpot")) {
     theMF=mF;  
     if (onlyDiagonal)
       edm::LogInfo("TrackAssociator") << " ---- Using Off Diagonal Covariance Terms = 0 ---- " <<  "\n";
     else 
       edm::LogInfo("TrackAssociator") << " ---- Using Off Diagonal Covariance Terms != 0 ---- " <<  "\n";
   }

TrackAssociatorByChi2::TrackAssociatorByChi2	(	const edm::ESHandle< MagneticField >	mF,
		double	chi2Cut,
		bool	onlyDiag,
		const edm::InputTag &	beamspotSrc
	)

inline

Constructor with magnetic field, double, bool and InputTag.

Definition at line 60 of file TrackAssociatorByChi2.h.

References bsSrc, chi2cut, onlyDiagonal, and theMF.

                                                                                                                            {
     chi2cut=chi2Cut;
     onlyDiagonal=onlyDiag;
     theMF=mF;  
     bsSrc = beamspotSrc;
   }

TrackAssociatorByChi2::~TrackAssociatorByChi2 ( )

inline

Destructor.

Definition at line 68 of file TrackAssociatorByChi2.h.

68 {}

Member Function Documentation

GenToRecoCollection TrackAssociatorByChi2::associateGenToReco	(	const edm::RefToBaseVector< reco::Track > &	tC,
		const edm::RefVector< reco::GenParticleCollection > &	tPCH,
		const edm::Event *	event = `0`,
		const edm::EventSetup *	setup = `0`
	)		const

Association Sim To Reco with Collections (Gen Particle version)

Definition at line 345 of file TrackAssociatorByChi2.cc.

References edm::RefToBaseVector< T >::begin(), edm::RefToBaseVector< T >::end(), edm::Event::getByLabel(), i, edm::AssociationMap< Tag >::insert(), j, LogDebug, edm::AssociationMap< Tag >::post_insert(), edm::RefVector< C, T, F >::product(), edm::RefVector< C, T, F >::size(), and mathSSE::sqrt().

Referenced by MultiTrackValidatorGenPs::analyze(), and associateGenToReco().

                                                                      {
 
   edm::Handle<reco::BeamSpot> recoBeamSpotHandle;
   e->getByLabel(bsSrc,recoBeamSpotHandle);
   reco::BeamSpot bs = *recoBeamSpotHandle;      
 
   GenToRecoCollection  outputCollection;
 
   GenParticleCollection tPC;
   if (tPCH.size()!=0)  tPC = *tPCH.product();
 
   int tpindex =0;
   for (GenParticleCollection::const_iterator tp=tPC.begin(); tp!=tPC.end(); tp++, ++tpindex){
     
     //skip tps with a very small pt
     //if (sqrt(tp->momentum().perp2())<0.5) continue;
     int charge = tp->charge();
     if (charge==0) continue;
     
     LogDebug("TrackAssociator") << "=========LOOKING FOR ASSOCIATION===========" << "\n"
                 << "TrackingParticle #"<<tpindex<<" with pt=" << sqrt(tp->momentum().perp2()) << "\n"
                 << "===========================================" << "\n";
     
     Basic3DVector<double> momAtVtx(tp->momentum().x(),tp->momentum().y(),tp->momentum().z());
     Basic3DVector<double> vert(tp->vertex().x(),tp->vertex().y(),tp->vertex().z());
       
     int tindex=0;
     for (RefToBaseVector<reco::Track>::const_iterator rt=tC.begin(); rt!=tC.end(); rt++, tindex++){
       
       TrackBase::ParameterVector rParameters = (*rt)->parameters();      
       TrackBase::CovarianceMatrix recoTrackCovMatrix = (*rt)->covariance();
       if (onlyDiagonal) {
     for (unsigned int i=0;i<5;i++){
       for (unsigned int j=0;j<5;j++){
         if (i!=j) recoTrackCovMatrix(i,j)=0;
       }
     }
       }
       recoTrackCovMatrix.Invert();
       
       double chi2 = getChi2(rParameters,recoTrackCovMatrix,momAtVtx,vert,charge,bs);
       
       if (chi2<chi2cut) {
     outputCollection.insert(edm::Ref<GenParticleCollection>(tPCH, tpindex),
                 std::make_pair(tC[tindex],
                            -chi2));//-chi2 because the Association Map is ordered using std::greater
       }
     }
   }
   outputCollection.post_insert();
   return outputCollection;
 }

virtual reco::GenToRecoCollection TrackAssociatorByChi2::associateGenToReco	(	edm::Handle< edm::View< reco::Track > > &	tCH,
		edm::Handle< reco::GenParticleCollection > &	tPCH,
		const edm::Event *	event = `0`,
		const edm::EventSetup *	setup = `0`
	)		const

inlinevirtual

compare reco to sim the handle of reco::Track and GenParticle collections

Definition at line 161 of file TrackAssociatorByChi2.h.

References associateGenToReco(), event(), edm::HandleBase::id(), j, edm::RefToBaseVector< T >::push_back(), edm::RefVector< C, T, F >::push_back(), and HcalObjRepresent::setup().

                                                                                               {
     edm::RefToBaseVector<reco::Track> tc(tCH);
     for (unsigned int j=0; j<tCH->size();j++)
       tc.push_back(edm::RefToBase<reco::Track>(tCH,j));
 
     edm::RefVector<reco::GenParticleCollection> tpc(tPCH.id());
     for (unsigned int j=0; j<tPCH->size();j++)
       tpc.push_back(edm::Ref<reco::GenParticleCollection>(tPCH,j));
 
     return associateGenToReco(tc,tpc,event,setup);
   }  

RecoToGenCollection TrackAssociatorByChi2::associateRecoToGen	(	const edm::RefToBaseVector< reco::Track > &	tC,
		const edm::RefVector< reco::GenParticleCollection > &	tPCH,
		const edm::Event *	event = `0`,
		const edm::EventSetup *	setup = `0`
	)		const

Association Sim To Reco with Collections (Gen Particle version)

Definition at line 288 of file TrackAssociatorByChi2.cc.

References edm::RefToBaseVector< T >::begin(), edm::RefToBaseVector< T >::end(), edm::Event::getByLabel(), i, edm::AssociationMap< Tag >::insert(), j, LogDebug, edm::AssociationMap< Tag >::post_insert(), edm::RefVector< C, T, F >::product(), and edm::RefVector< C, T, F >::size().

Referenced by MultiTrackValidatorGenPs::analyze(), and associateRecoToGen().

                                                                                                 {
   edm::Handle<reco::BeamSpot> recoBeamSpotHandle;
   e->getByLabel(bsSrc,recoBeamSpotHandle);
   reco::BeamSpot bs = *recoBeamSpotHandle;      
 
   RecoToGenCollection  outputCollection;
 
   GenParticleCollection tPC;
   if (tPCH.size()!=0)  tPC = *tPCH.product();
 
   int tindex=0;
   for (RefToBaseVector<reco::Track>::const_iterator rt=tC.begin(); rt!=tC.end(); rt++, tindex++){
 
     LogDebug("TrackAssociator") << "=========LOOKING FOR ASSOCIATION===========" << "\n"
                 << "rec::Track #"<<tindex<<" with pt=" << (*rt)->pt() <<  "\n"
                 << "===========================================" << "\n";
  
     TrackBase::ParameterVector rParameters = (*rt)->parameters();
 
     TrackBase::CovarianceMatrix recoTrackCovMatrix = (*rt)->covariance();
     if (onlyDiagonal){
       for (unsigned int i=0;i<5;i++){
     for (unsigned int j=0;j<5;j++){
       if (i!=j) recoTrackCovMatrix(i,j)=0;
     }
       }
     } 
 
     recoTrackCovMatrix.Invert();
 
     int tpindex =0;
     for (GenParticleCollection::const_iterator tp=tPC.begin(); tp!=tPC.end(); tp++, ++tpindex){
     
       //skip tps with a very small pt
       //if (sqrt(tp->momentum().perp2())<0.5) continue;
       int charge = tp->charge();
       if (charge==0) continue;
       Basic3DVector<double> momAtVtx(tp->momentum().x(),tp->momentum().y(),tp->momentum().z());
       Basic3DVector<double> vert=(Basic3DVector<double>) tp->vertex();
 
       double chi2 = getChi2(rParameters,recoTrackCovMatrix,momAtVtx,vert,charge,bs);
       
       if (chi2<chi2cut) {
     outputCollection.insert(tC[tindex], 
                 std::make_pair(edm::Ref<GenParticleCollection>(tPCH, tpindex),
                            -chi2));//-chi2 because the Association Map is ordered using std::greater
       }
     }
   }
   outputCollection.post_insert();
   return outputCollection;
 }

virtual reco::RecoToGenCollection TrackAssociatorByChi2::associateRecoToGen	(	edm::Handle< edm::View< reco::Track > > &	tCH,
		edm::Handle< reco::GenParticleCollection > &	tPCH,
		const edm::Event *	event = `0`,
		const edm::EventSetup *	setup = `0`
	)		const

inlinevirtual

compare reco to sim the handle of reco::Track and GenParticle collections

Definition at line 145 of file TrackAssociatorByChi2.h.

References associateRecoToGen(), event(), edm::HandleBase::id(), j, edm::RefToBaseVector< T >::push_back(), edm::RefVector< C, T, F >::push_back(), and HcalObjRepresent::setup().

                                                                                               {
     edm::RefToBaseVector<reco::Track> tc(tCH);
     for (unsigned int j=0; j<tCH->size();j++)
       tc.push_back(edm::RefToBase<reco::Track>(tCH,j));
 
     edm::RefVector<reco::GenParticleCollection> tpc(tPCH.id());
     for (unsigned int j=0; j<tPCH->size();j++)
       tpc.push_back(edm::Ref<reco::GenParticleCollection>(tPCH,j));
 
     return associateRecoToGen(tc,tpc,event,setup);
   }

double TrackAssociatorByChi2::associateRecoToSim	(	reco::TrackCollection::const_iterator	,
		TrackingParticleCollection::const_iterator	,
		const reco::BeamSpot &
	)		const

compare reco::TrackCollection and TrackingParticleCollection iterators: returns the chi2

Referenced by KVFTest::analyze().

RecoToSimCollection TrackAssociatorByChi2::associateRecoToSim	(	const edm::RefToBaseVector< reco::Track > &	tC,
		const edm::RefVector< TrackingParticleCollection > &	tPCH,
		const edm::Event *	event = `0`,
		const edm::EventSetup *	setup = `0`
	)		const

overridevirtual

Association Reco To Sim with Collections.

Implements TrackAssociatorBase.

Definition at line 173 of file TrackAssociatorByChi2.cc.

References edm::RefToBaseVector< T >::begin(), edm::RefToBaseVector< T >::end(), edm::Event::getByLabel(), i, edm::AssociationMap< Tag >::insert(), j, LogDebug, edm::AssociationMap< Tag >::post_insert(), edm::RefVector< C, T, F >::product(), and edm::RefVector< C, T, F >::size().

                                                                                                 {
   edm::Handle<reco::BeamSpot> recoBeamSpotHandle;
   e->getByLabel(bsSrc,recoBeamSpotHandle);
   reco::BeamSpot bs = *recoBeamSpotHandle;      
 
   RecoToSimCollection  outputCollection;
 
   TrackingParticleCollection tPC;
   if (tPCH.size()!=0)  tPC = *tPCH.product();
 
   int tindex=0;
   for (RefToBaseVector<reco::Track>::const_iterator rt=tC.begin(); rt!=tC.end(); rt++, tindex++){
 
     LogDebug("TrackAssociator") << "=========LOOKING FOR ASSOCIATION===========" << "\n"
                 << "rec::Track #"<<tindex<<" with pt=" << (*rt)->pt() <<  "\n"
                 << "===========================================" << "\n";
  
     TrackBase::ParameterVector rParameters = (*rt)->parameters();
 
     TrackBase::CovarianceMatrix recoTrackCovMatrix = (*rt)->covariance();
     if (onlyDiagonal){
       for (unsigned int i=0;i<5;i++){
     for (unsigned int j=0;j<5;j++){
       if (i!=j) recoTrackCovMatrix(i,j)=0;
     }
       }
     } 
 
     recoTrackCovMatrix.Invert();
 
     int tpindex =0;
     for (TrackingParticleCollection::const_iterator tp=tPC.begin(); tp!=tPC.end(); tp++, ++tpindex){
     
       //skip tps with a very small pt
       //if (sqrt(tp->momentum().perp2())<0.5) continue;
       int charge = tp->charge();
       if (charge==0) continue;
       Basic3DVector<double> momAtVtx(tp->momentum().x(),tp->momentum().y(),tp->momentum().z());
       Basic3DVector<double> vert=(Basic3DVector<double>) tp->vertex();
 
       double chi2 = getChi2(rParameters,recoTrackCovMatrix,momAtVtx,vert,charge,bs);
       
       if (chi2<chi2cut) {
     outputCollection.insert(tC[tindex], 
                 std::make_pair(edm::Ref<TrackingParticleCollection>(tPCH, tpindex),
                            -chi2));//-chi2 because the Association Map is ordered using std::greater
       }
     }
   }
   outputCollection.post_insert();
   return outputCollection;
 }

virtual reco::RecoToSimCollection TrackAssociatorByChi2::associateRecoToSim	(	edm::Handle< edm::View< reco::Track > > &	tCH,
		edm::Handle< TrackingParticleCollection > &	tPCH,
		const edm::Event *	event = `0`,
		const edm::EventSetup *	setup = `0`
	)		const

inlineoverridevirtual

compare reco to sim the handle of reco::Track and TrackingParticle collections

Reimplemented from TrackAssociatorBase.

Definition at line 117 of file TrackAssociatorByChi2.h.

References TrackAssociatorBase::associateRecoToSim(), event(), and HcalObjRepresent::setup().

                                                                                                {
     return TrackAssociatorBase::associateRecoToSim(tCH,tPCH,event,setup);
   }

SimToRecoCollection TrackAssociatorByChi2::associateSimToReco	(	const edm::RefToBaseVector< reco::Track > &	tC,
		const edm::RefVector< TrackingParticleCollection > &	tPCH,
		const edm::Event *	event = `0`,
		const edm::EventSetup *	setup = `0`
	)		const

overridevirtual

Association Sim To Reco with Collections.

Implements TrackAssociatorBase.

Definition at line 230 of file TrackAssociatorByChi2.cc.

References edm::RefToBaseVector< T >::begin(), edm::RefToBaseVector< T >::end(), edm::Event::getByLabel(), i, edm::AssociationMap< Tag >::insert(), j, LogDebug, edm::AssociationMap< Tag >::post_insert(), edm::RefVector< C, T, F >::product(), edm::RefVector< C, T, F >::size(), and mathSSE::sqrt().

                                                                                                  {
   edm::Handle<reco::BeamSpot> recoBeamSpotHandle;
   e->getByLabel(bsSrc,recoBeamSpotHandle);
   reco::BeamSpot bs = *recoBeamSpotHandle;      
 
   SimToRecoCollection  outputCollection;
 
   TrackingParticleCollection tPC;
   if (tPCH.size()!=0)  tPC = *tPCH.product();
 
   int tpindex =0;
   for (TrackingParticleCollection::const_iterator tp=tPC.begin(); tp!=tPC.end(); tp++, ++tpindex){
     
     //skip tps with a very small pt
     //if (sqrt(tp->momentum().perp2())<0.5) continue;
     int charge = tp->charge();
     if (charge==0) continue;
     
     LogDebug("TrackAssociator") << "=========LOOKING FOR ASSOCIATION===========" << "\n"
                 << "TrackingParticle #"<<tpindex<<" with pt=" << sqrt(tp->momentum().perp2()) << "\n"
                 << "===========================================" << "\n";
     
     Basic3DVector<double> momAtVtx(tp->momentum().x(),tp->momentum().y(),tp->momentum().z());
     Basic3DVector<double> vert(tp->vertex().x(),tp->vertex().y(),tp->vertex().z());
       
     int tindex=0;
     for (RefToBaseVector<reco::Track>::const_iterator rt=tC.begin(); rt!=tC.end(); rt++, tindex++){
       
       TrackBase::ParameterVector rParameters = (*rt)->parameters();      
       TrackBase::CovarianceMatrix recoTrackCovMatrix = (*rt)->covariance();
       if (onlyDiagonal) {
     for (unsigned int i=0;i<5;i++){
       for (unsigned int j=0;j<5;j++){
         if (i!=j) recoTrackCovMatrix(i,j)=0;
       }
     }
       }
       recoTrackCovMatrix.Invert();
       
       double chi2 = getChi2(rParameters,recoTrackCovMatrix,momAtVtx,vert,charge,bs);
       
       if (chi2<chi2cut) {
     outputCollection.insert(edm::Ref<TrackingParticleCollection>(tPCH, tpindex),
                 std::make_pair(tC[tindex],
                            -chi2));//-chi2 because the Association Map is ordered using std::greater
       }
     }
   }
   outputCollection.post_insert();
   return outputCollection;
 }

virtual reco::SimToRecoCollection TrackAssociatorByChi2::associateSimToReco	(	edm::Handle< edm::View< reco::Track > > &	tCH,
		edm::Handle< TrackingParticleCollection > &	tPCH,
		const edm::Event *	event = `0`,
		const edm::EventSetup *	setup = `0`
	)		const

inlineoverridevirtual

compare reco to sim the handle of reco::Track and TrackingParticle collections

Reimplemented from TrackAssociatorBase.

Definition at line 126 of file TrackAssociatorByChi2.h.

References TrackAssociatorBase::associateSimToReco(), event(), and HcalObjRepresent::setup().

                                                                                                {
     return TrackAssociatorBase::associateSimToReco(tCH,tPCH,event,setup);
   }  

double TrackAssociatorByChi2::compareTracksParam	(	reco::TrackCollection::const_iterator	,
		edm::SimTrackContainer::const_iterator	,
		const math::XYZTLorentzVectorD &	,
		const GlobalVector &	,
		const reco::TrackBase::CovarianceMatrix &	,
		const reco::BeamSpot &
	)		const

compare reco::TrackCollection and edm::SimTrackContainer iterators: returns the chi2

TrackAssociatorByChi2::RecoToSimPairAssociation TrackAssociatorByChi2::compareTracksParam	(	const reco::TrackCollection &	rtColl,
		const edm::SimTrackContainer &	stColl,
		const edm::SimVertexContainer &	svColl,
		const reco::BeamSpot &	bs
	)		const

compare collections reco to sim

Definition at line 41 of file TrackAssociatorByChi2.cc.

References reco::deltaPhi(), f, i, and j.

                                                    {
   
   RecoToSimPairAssociation outputVec;
 
   for (TrackCollection::const_iterator track=rtColl.begin(); track!=rtColl.end(); track++){
      Chi2SimMap outMap;
 
     TrackBase::ParameterVector rParameters = track->parameters();
 
     TrackBase::CovarianceMatrix recoTrackCovMatrix = track->covariance();
     if (onlyDiagonal){
       for (unsigned int i=0;i<5;i++){
     for (unsigned int j=0;j<5;j++){
       if (i!=j) recoTrackCovMatrix(i,j)=0;
     }
       }
     }
     recoTrackCovMatrix.Invert();
 
     for (SimTrackContainer::const_iterator st=stColl.begin(); st!=stColl.end(); st++){
 
       Basic3DVector<double> momAtVtx(st->momentum().x(),st->momentum().y(),st->momentum().z());
       Basic3DVector<double> vert = (Basic3DVector<double>)  svColl[st->vertIndex()].position();
 
       std::pair<bool,reco::TrackBase::ParameterVector> params = parametersAtClosestApproach(vert, momAtVtx, st->charge(), bs);
       if (params.first){
     TrackBase::ParameterVector sParameters = params.second;
       
     TrackBase::ParameterVector diffParameters = rParameters - sParameters;
         diffParameters[2] = reco::deltaPhi(diffParameters[2],0.f);
     double chi2 = ROOT::Math::Dot(diffParameters * recoTrackCovMatrix, diffParameters);
     chi2/=5;
     if (chi2<chi2cut) outMap[chi2]=*st;
       }
     }
     outputVec.push_back(RecoToSimPair(*track,outMap));
   }
   return outputVec;
 }

double TrackAssociatorByChi2::getChi2	(	reco::TrackBase::ParameterVector &	rParameters,
		reco::TrackBase::CovarianceMatrix &	recoTrackCovMatrix,
		Basic3DVector< double > &	momAtVtx,
		Basic3DVector< double > &	vert,
		int &	charge,
		const reco::BeamSpot &	bs
	)		const

basic method where chi2 is computed

Definition at line 84 of file TrackAssociatorByChi2.cc.

References reco::deltaPhi(), f, LogDebug, and funct::sin().

                                                    {
   
   double chi2;
   
   std::pair<bool,reco::TrackBase::ParameterVector> params = parametersAtClosestApproach(vert, momAtVtx, charge, bs);
   if (params.first){
     TrackBase::ParameterVector sParameters=params.second;
     
     TrackBase::ParameterVector diffParameters = rParameters - sParameters;
     diffParameters[2] = reco::deltaPhi(diffParameters[2],0.f);
     chi2 = ROOT::Math::Dot(diffParameters * recoTrackCovMatrix, diffParameters);
     chi2 /= 5;
     
     LogDebug("TrackAssociator") << "====NEW RECO TRACK WITH PT=" << sin(rParameters[1])*float(charge)/rParameters[0] << "====\n" 
                 << "qoverp sim: " << sParameters[0] << "\n" 
                 << "lambda sim: " << sParameters[1] << "\n" 
                 << "phi    sim: " << sParameters[2] << "\n" 
                 << "dxy    sim: " << sParameters[3] << "\n" 
                 << "dsz    sim: " << sParameters[4] << "\n" 
                 << ": " /*<< */ << "\n" 
                 << "qoverp rec: " << rParameters[0] << "\n" 
                 << "lambda rec: " << rParameters[1] << "\n" 
                 << "phi    rec: " << rParameters[2] << "\n" 
                 << "dxy    rec: " << rParameters[3] << "\n" 
                 << "dsz    rec: " << rParameters[4] << "\n" 
                 << ": " /*<< */ << "\n" 
                 << "chi2: " << chi2 << "\n";
     
     return chi2;  
   } else {
     return 10000000000.;
   }
 }

pair< bool, TrackBase::ParameterVector > TrackAssociatorByChi2::parametersAtClosestApproach	(	const Basic3DVector< double > &	vertex,
		const Basic3DVector< double > &	momAtVtx,
		float	charge,
		const reco::BeamSpot &	bs
	)		const

propagate the track parameters of TrackinParticle from production vertex to the point of closest approach to the beam line.

Definition at line 145 of file TrackAssociatorByChi2.cc.

References FreeTrajectoryState::charge(), funct::cos(), Geom::halfPi(), PV3DBase< T, PVType, FrameType >::mag(), FreeTrajectoryState::momentum(), AlCaHLTBitMon_ParallelJobs::p, PV3DBase< T, PVType, FrameType >::perp(), PV3DBase< T, PVType, FrameType >::phi(), FreeTrajectoryState::position(), funct::sin(), PV3DBase< T, PVType, FrameType >::theta(), TrajectoryStateClosestToBeamLine::trackStateAtPCA(), findQualityFiles::v, PV3DBase< T, PVType, FrameType >::x(), Basic3DVector< T >::x(), PV3DBase< T, PVType, FrameType >::y(), Basic3DVector< T >::y(), PV3DBase< T, PVType, FrameType >::z(), and Basic3DVector< T >::z().

Referenced by VertexFitterResult::fill().

                                                     {
   
   TrackBase::ParameterVector sParameters;
   try {
     FreeTrajectoryState ftsAtProduction(GlobalPoint(vertex.x(),vertex.y(),vertex.z()),
                     GlobalVector(momAtVtx.x(),momAtVtx.y(),momAtVtx.z()),
                     TrackCharge(charge),
                     theMF.product());
     TSCBLBuilderNoMaterial tscblBuilder;
     TrajectoryStateClosestToBeamLine tsAtClosestApproach = tscblBuilder(ftsAtProduction,bs);//as in TrackProducerAlgorithm
     
     GlobalPoint v = tsAtClosestApproach.trackStateAtPCA().position();
     GlobalVector p = tsAtClosestApproach.trackStateAtPCA().momentum();
     sParameters[0] = tsAtClosestApproach.trackStateAtPCA().charge()/p.mag();
     sParameters[1] = Geom::halfPi() - p.theta();
     sParameters[2] = p.phi();
     sParameters[3] = (-v.x()*sin(p.phi())+v.y()*cos(p.phi()));
     sParameters[4] = v.z()*p.perp()/p.mag() - (v.x()*p.x()+v.y()*p.y())/p.perp() * p.z()/p.mag();
     
     return pair<bool,TrackBase::ParameterVector>(true,sParameters);
   } catch ( ... ) {
     return pair<bool,TrackBase::ParameterVector>(false,sParameters);
   }
 }