Inheritance diagram for InclusiveVertexFinder:

Public Member Functions
	InclusiveVertexFinder (const edm::ParameterSet &params)
virtual void	produce (edm::Event &event, const edm::EventSetup &es)
Private Member Functions
std::pair< std::vector < reco::TransientTrack > , GlobalPoint >	nearTracks (const reco::TransientTrack &seed, const std::vector< reco::TransientTrack > &tracks, const reco::Vertex &primaryVertex) const
bool	trackFilter (const reco::TrackRef &track) const
Private Attributes
edm::InputTag	beamSpotCollection
double	clusterMaxDistance
double	clusterMaxSignificance
double	clusterMinAngleCosine
double	clusterScale
double	min3DIPSignificance
double	min3DIPValue
unsigned int	minHits
double	minPt
edm::InputTag	primaryVertexCollection
edm::InputTag	trackCollection
double	vertexMinAngleCosine
double	vertexMinDLen2DSig
double	vertexMinDLenSig
std::auto_ptr < VertexReconstructor >	vtxReco

Detailed Description

Definition at line 29 of file InclusiveVertexFinder.cc.

Constructor & Destructor Documentation

InclusiveVertexFinder::InclusiveVertexFinder ( const edm::ParameterSet & params )

Definition at line 58 of file InclusiveVertexFinder.cc.

                                                                          :
        beamSpotCollection(params.getParameter<edm::InputTag>("beamSpot")),
        primaryVertexCollection(params.getParameter<edm::InputTag>("primaryVertices")),
        trackCollection(params.getParameter<edm::InputTag>("tracks")),
        minHits(params.getParameter<unsigned int>("minHits")),
        minPt(params.getParameter<double>("minPt")), //0.8
        min3DIPSignificance(params.getParameter<double>("seedMin3DIPSignificance")),
        min3DIPValue(params.getParameter<double>("seedMin3DIPValue")),
        clusterMaxDistance(params.getParameter<double>("clusterMaxDistance")),
        clusterMaxSignificance(params.getParameter<double>("clusterMaxSignificance")), //3
        clusterScale(params.getParameter<double>("clusterScale")),//10.
        clusterMinAngleCosine(params.getParameter<double>("clusterMinAngleCosine")), //0.0
        vertexMinAngleCosine(params.getParameter<double>("vertexMinAngleCosine")), //0.98
        vertexMinDLen2DSig(params.getParameter<double>("vertexMinDLen2DSig")), //2.5
        vertexMinDLenSig(params.getParameter<double>("vertexMinDLenSig")), //0.5
        vtxReco(new ConfigurableVertexReconstructor(params.getParameter<edm::ParameterSet>("vertexReco")))

{
        produces<reco::VertexCollection>();
        //produces<reco::VertexCollection>("multi");
}

Member Function Documentation

std::pair< std::vector< reco::TransientTrack >, GlobalPoint > InclusiveVertexFinder::nearTracks	(	const reco::TransientTrack &	seed,
		const std::vector< reco::TransientTrack > &	tracks,
		const reco::Vertex &	primaryVertex
	)		const `[private]`

Definition at line 90 of file InclusiveVertexFinder.cc.

References IPTools::absoluteImpactParameter3D(), TwoTrackMinimumDistance::calculate(), TrajectoryStateOnSurface::cartesianError(), clusterMaxDistance, clusterMaxSignificance, clusterMinAngleCosine, clusterScale, CommonMethods::cp(), TwoTrackMinimumDistance::crossingPoint(), VertexDistance3D::distance(), TwoTrackMinimumDistance::distance(), Vector3DBase< T, FrameTag >::dot(), TrajectoryStateOnSurface::globalDirection(), reco::TransientTrack::impactPointState(), m, mag(), TwoTrackMinimumDistance::points(), reco::Vertex::position(), CartesianTrajectoryError::position(), query::result, Measurement1D::significance(), csvLumiCalc::unit, Vector3DBase< T, FrameTag >::unit(), PV3DBase< T, PVType, FrameType >::x(), PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().

Referenced by produce().

{
      VertexDistance3D distanceComputer;
      GlobalPoint pv(primaryVertex.position().x(),primaryVertex.position().y(),primaryVertex.position().z());
      std::vector<reco::TransientTrack> result;
      TwoTrackMinimumDistance dist;
      GlobalPoint seedingPoint;
      float sumWeights=0;
      std::pair<bool,Measurement1D> ipSeed = IPTools::absoluteImpactParameter3D(seed,primaryVertex);
      float pvDistance = ipSeed.second.value();

      for(std::vector<reco::TransientTrack>::const_iterator tt = tracks.begin();tt!=tracks.end(); ++tt )   {

       if(*tt==seed) continue;

       std::pair<bool,Measurement1D> ip = IPTools::absoluteImpactParameter3D(*tt,primaryVertex);
       if(dist.calculate(tt->impactPointState(),seed.impactPointState()))
            {
                 GlobalPoint ttPoint          = dist.points().first;
                 GlobalError ttPointErr       = tt->impactPointState().cartesianError().position();
                 GlobalPoint seedPosition     = dist.points().second;
                 GlobalError seedPositionErr  = seed.impactPointState().cartesianError().position();
                 Measurement1D m = distanceComputer.distance(VertexState(seedPosition,seedPositionErr), VertexState(ttPoint, ttPointErr));
                 GlobalPoint cp(dist.crossingPoint()); 


                 float distanceFromPV =  (dist.points().second-pv).mag();
                 float distance = dist.distance();
                 GlobalVector trackDir2D(tt->impactPointState().globalDirection().x(),tt->impactPointState().globalDirection().y(),0.); 
                 GlobalVector seedDir2D(seed.impactPointState().globalDirection().x(),seed.impactPointState().globalDirection().y(),0.); 
                 float dotprodTrackSeed2D = trackDir2D.unit().dot(seedDir2D.unit());

                 float dotprodTrack = (dist.points().first-pv).unit().dot(tt->impactPointState().globalDirection().unit());
                 float dotprodSeed = (dist.points().second-pv).unit().dot(seed.impactPointState().globalDirection().unit());

                 float w = distanceFromPV*distanceFromPV/(pvDistance*distance);

                 if(m.significance() < clusterMaxSignificance && 
                    dotprodSeed > clusterMinAngleCosine && //Angles between PV-PCAonSeed vectors and seed directions
                    dotprodTrack > clusterMinAngleCosine && //Angles between PV-PCAonTrack vectors and track directions
                    dotprodTrackSeed2D > clusterMinAngleCosine && //Angle between track and seed
                    distance*clusterScale < distanceFromPV*distanceFromPV/pvDistance && // cut scaling with track density
                    distance < clusterMaxDistance)  // absolute distance cut
                 {
                     result.push_back(*tt);
                     seedingPoint = GlobalPoint(cp.x()*w+seedingPoint.x(),cp.y()*w+seedingPoint.y(),cp.z()*w+seedingPoint.z());  
                     sumWeights+=w; 
                 }
            }
       }

seedingPoint = GlobalPoint(seedingPoint.x()/sumWeights,seedingPoint.y()/sumWeights,seedingPoint.z()/sumWeights);
return std::pair<std::vector<reco::TransientTrack>,GlobalPoint>(result,seedingPoint);

}

void InclusiveVertexFinder::produce	(	edm::Event &	event,
		const edm::EventSetup &	es
	)		`[virtual]`

Implements edm::EDProducer.

Definition at line 147 of file InclusiveVertexFinder.cc.

References IPTools::absoluteImpactParameter3D(), beamSpotCollection, dir, Vector3DBase< T, FrameTag >::dot(), edm::EventSetup::get(), i, TransientVertex::isValid(), j, min3DIPSignificance, min3DIPValue, nearTracks(), primaryVertexCollection, dt_dqm_sourceclient_common_cff::reco, asciidump::s, reco::TransientTrack::setBeamSpot(), Measurement1D::significance(), matplotRender::t, trackCollection, trackFilter(), testEve_cfg::tracks, csvLumiCalc::unit, Vector3DBase< T, FrameTag >::unit(), Unknown, v, AdaptiveVertexFitter::vertex(), vertexMinAngleCosine, vertexMinDLen2DSig, vertexMinDLenSig, and vtxReco.

{
        using namespace reco;

  double sigmacut = 3.0;
  double Tini = 256.;
  double ratio = 0.25;
  VertexDistance3D vdist;
  VertexDistanceXY vdist2d;
  MultiVertexFitter theMultiVertexFitter;
  AdaptiveVertexFitter theAdaptiveFitter(
                                            GeometricAnnealing(sigmacut, Tini, ratio),
                                            DefaultLinearizationPointFinder(),
                                            KalmanVertexUpdator<5>(),
                                            KalmanVertexTrackCompatibilityEstimator<5>(),
                                            KalmanVertexSmoother() );


        edm::Handle<BeamSpot> beamSpot;
        event.getByLabel(beamSpotCollection, beamSpot);

        edm::Handle<VertexCollection> primaryVertices;
        event.getByLabel(primaryVertexCollection, primaryVertices);

        edm::Handle<TrackCollection> tracks;
        event.getByLabel(trackCollection, tracks);

        edm::ESHandle<TransientTrackBuilder> trackBuilder;
        es.get<TransientTrackRecord>().get("TransientTrackBuilder",
                                           trackBuilder);


        const reco::Vertex &pv = (*primaryVertices)[0];
        
        std::vector<TransientTrack> tts;
        std::vector<TransientTrack> seeds;
        //Fill transient track vector and find seeds
        for(TrackCollection::const_iterator track = tracks->begin();
            track != tracks->end(); ++track) {
                TrackRef ref(tracks, track - tracks->begin());
                if (!trackFilter(ref))
                        continue;

                TransientTrack tt = trackBuilder->build(ref);
                tt.setBeamSpot(*beamSpot);
                tts.push_back(tt);
                std::pair<bool,Measurement1D> ip = IPTools::absoluteImpactParameter3D(tt,pv);
//                std::cout << "track: " << ip.second.value() << " " << ip.second.significance() << " " << track->hitPattern().trackerLayersWithMeasurement() << " " << track->pt() << " " << track->eta() << std::endl;
                if(ip.first && ip.second.value() >= min3DIPValue && ip.second.significance() >= min3DIPSignificance)
                  { 
  //                  std::cout << "new seed " << ip.second.value() << " " << ip.second.significance() << " " << track->hitPattern().trackerLayersWithMeasurement() << " " << track->pt() << " " << track->eta() << std::endl;
                    seeds.push_back(tt);  
                  }
 
        }


        //Create BS object from PV to feed in the AVR
        BeamSpot::CovarianceMatrix cov;
        for(unsigned int i = 0; i < 7; i++) {
                for(unsigned int j = 0; j < 7; j++) {
                        if (i < 3 && j < 3)
                                cov(i, j) = pv.covariance(i, j);
                        else
                                cov(i, j) = 0.0;
                }
        }
        BeamSpot bs(pv.position(), 0.0, 0.0, 0.0, 0.0, cov, BeamSpot::Unknown);
        std::auto_ptr<VertexCollection> recoVertices(new VertexCollection);
        int i=0;
        std::vector< std::vector<TransientTrack> > clusters;
        for(std::vector<TransientTrack>::const_iterator s = seeds.begin();
            s != seeds.end(); ++s,++i)
        {
                
//              std::cout << "Match pvd = "<< pvd[i] <<   std::endl;
                std::pair<std::vector<reco::TransientTrack>,GlobalPoint>  ntracks = nearTracks(*s,tts,pv);
                if(ntracks.first.size() == 0 ) continue;
                ntracks.first.push_back(*s);
                clusters.push_back(ntracks.first); 
                std::vector<TransientVertex> vertices;
//              try {
                        vertices = vtxReco->vertices(ntracks.first, bs);
                        TransientVertex singleFitVertex;
                        singleFitVertex = theAdaptiveFitter.vertex(ntracks.first,ntracks.second); //edPoint);
                        if(singleFitVertex.isValid())
                          vertices.push_back(singleFitVertex);
//              } catch(...) {
//                      vertices.clear();
//              }

//              std::cout << "for this seed I found  " << vertices.size() << " vertices"<< std::endl;
                for(std::vector<TransientVertex>::const_iterator v = vertices.begin();
                    v != vertices.end(); ++v) {
//                      if(v->degreesOfFreedom() > 0.2)
                        {
                         Measurement1D dlen= vdist.distance(pv,*v);
                         Measurement1D dlen2= vdist2d.distance(pv,*v);
                         reco::Vertex vv(*v);
  //                       std::cout << "V chi2/n: " << v->normalisedChiSquared() << " ndof: " <<v->degreesOfFreedom() ;
    //                     std::cout << " dlen: " << dlen.value() << " error: " << dlen.error() << " signif: " << dlen.significance();
      //                   std::cout << " dlen2: " << dlen2.value() << " error2: " << dlen2.error() << " signif2: " << dlen2.significance();
        //                 std::cout << " pos: " << vv.position() << " error: " <<vv.xError() << " " << vv.yError() << " " << vv.zError() << std::endl;
                         GlobalVector dir;  
                         std::vector<reco::TransientTrack> ts = v->originalTracks();
                        for(std::vector<reco::TransientTrack>::const_iterator i = ts.begin();
                            i != ts.end(); ++i) {
                                reco::TrackRef t = i->trackBaseRef().castTo<reco::TrackRef>();
                                float w = v->trackWeight(*i);
                                if (w > 0.5) dir+=i->impactPointState().globalDirection();
          //                      std::cout << "\t[" << (*t).pt() << ": "
            //                              << (*t).eta() << ", "
              //                            << (*t).phi() << "], "
                //                          << w << std::endl;
                        }
                       GlobalPoint ppv(pv.position().x(),pv.position().y(),pv.position().z());
                       GlobalPoint sv((*v).position().x(),(*v).position().y(),(*v).position().z());
                       float vscal = dir.unit().dot((sv-ppv).unit()) ;
//                        std::cout << "Vscal: " <<  vscal << std::endl;
                        if(dlen.significance() > vertexMinDLenSig  && vscal > vertexMinAngleCosine &&  v->normalisedChiSquared() < 10 && dlen2.significance() > vertexMinDLen2DSig)
                         recoVertices->push_back(*v);


                        }
                   }
        }
        event.put(recoVertices);

}

bool InclusiveVertexFinder::trackFilter ( const reco::TrackRef & track ) const [private]

Definition at line 80 of file InclusiveVertexFinder.cc.

References minHits, and minPt.

Referenced by produce().

{
        if (track->hitPattern().trackerLayersWithMeasurement() < (int)minHits)
                return false;
        if (track->pt() < minPt )
                return false;
        
        return true;
}