#include <NuclearVertexBuilder.h>

Classes
class	cmpTracks

Public Member Functions
void	addSecondaryTrack (const reco::TrackRef &secTrack)

void	build (const reco::TrackRef &primaryTrack, std::vector< reco::TrackRef > &secondaryTrack)

ClosestApproachInRPhi *	closestApproach (const reco::TrackRef &primTrack, const reco::TrackRef &secTrack) const

reco::Vertex	getVertex () const

bool	isCompatible (const reco::TrackRef &secTrack) const

	NuclearVertexBuilder (const MagneticField mag, const TransientTrackBuilder transientTkBuilder, const edm::ParameterSet &iConfig)

Private Member Functions
void	checkEnergy (const reco::TrackRef &primTrack, std::vector< reco::TrackRef > &tC) const

void	cleanTrackCollection (const reco::TrackRef &primTrack, std::vector< reco::TrackRef > &tC) const

bool	FillVertexWithAdaptVtxFitter (const reco::TrackRef &primTrack, const std::vector< reco::TrackRef > &secTracks)

bool	FillVertexWithCrossingPoint (const reco::TrackRef &primTrack, const std::vector< reco::TrackRef > &secTracks)

void	FillVertexWithLastPrimHit (const reco::TrackRef &primTrack, const std::vector< reco::TrackRef > &secTracks)

FreeTrajectoryState	getTrajectory (const reco::TrackRef &track) const

bool	isGoodSecondaryTrack (const reco::TrackRef &primTrack, const reco::TrackRef &secTrack) const

bool	isGoodSecondaryTrack (const reco::TrackRef &secTrack, const reco::TrackRef &primTrack, const double &distOfClosestApp, const GlobalPoint &crossPoint) const

Private Attributes
double	chi2Cut_

double	DPtovPtCut_

double	minDistFromPrim_

double	minDistFromVtx_

double	shareFrac_

reco::Vertex	the_vertex

const MagneticField *	theMagField

const TransientTrackBuilder *	theTransientTrackBuilder

Detailed Description

Definition at line 16 of file NuclearVertexBuilder.h.

Constructor & Destructor Documentation

NuclearVertexBuilder::NuclearVertexBuilder	(	const MagneticField *	mag,
		const TransientTrackBuilder *	transientTkBuilder,
		const edm::ParameterSet &	iConfig
	)

inline

Definition at line 19 of file NuclearVertexBuilder.h.

                                                                                                                                           : 
                theMagField(mag), 
                theTransientTrackBuilder(transientTkBuilder), 
                minDistFromPrim_( iConfig.getParameter<double>("minDistFromPrimary") ),
                chi2Cut_(iConfig.getParameter<double>("chi2Cut")), 
                DPtovPtCut_(iConfig.getParameter<double>("DPtovPtCut")),
                minDistFromVtx_(iConfig.getParameter<double>("minDistFromVtx")),
                shareFrac_(iConfig.getParameter<double>("shareFrac")){}

Member Function Documentation

void NuclearVertexBuilder::addSecondaryTrack ( const reco::TrackRef & secTrack )

Definition at line 190 of file NuclearVertexBuilder.cc.

References build(), the_vertex, reco::Vertex::tracks_begin(), and reco::Vertex::tracks_end().

                                                                            {
         std::vector<reco::TrackRef> allSecondary;
         for( reco::Vertex::trackRef_iterator it=the_vertex.tracks_begin()+1; it != the_vertex.tracks_end(); it++) {
             allSecondary.push_back( (*it).castTo<reco::TrackRef>() );
         } 
         allSecondary.push_back( secTrack );
         build( (*the_vertex.tracks_begin()).castTo<reco::TrackRef>(), allSecondary );
 }

void NuclearVertexBuilder::build	(	const reco::TrackRef &	primaryTrack,
		std::vector< reco::TrackRef > &	secondaryTrack
	)

Definition at line 10 of file NuclearVertexBuilder.cc.

References checkEnergy(), cleanTrackCollection(), FillVertexWithAdaptVtxFitter(), FillVertexWithCrossingPoint(), and FillVertexWithLastPrimHit().

Referenced by addSecondaryTrack().

                                                                                                    {
 
      cleanTrackCollection(primTrack, secTracks); 
      std::sort(secTracks.begin(),secTracks.end(),cmpTracks());
      checkEnergy(primTrack, secTracks);
 
      if( secTracks.size() != 0) {
          if( FillVertexWithAdaptVtxFitter(primTrack, secTracks) ) return;
          else if( FillVertexWithCrossingPoint(primTrack, secTracks) ) return;
          else FillVertexWithLastPrimHit( primTrack, secTracks);
      }
      else {
        // if no secondary tracks : vertex position = position of last rechit of the primary track 
        FillVertexWithLastPrimHit( primTrack, secTracks);
      }
 }

void NuclearVertexBuilder::checkEnergy	(	const reco::TrackRef &	primTrack,
		std::vector< reco::TrackRef > &	tC
	)		const

private

Definition at line 271 of file NuclearVertexBuilder.cc.

References i.

Referenced by build().

                                                                            {
    float totalEnergy=0;
    for(size_t i=0; i< tC.size(); ++i) {
      totalEnergy += tC[i]->p();
    }
    if( totalEnergy > primTrack->p()+0.1*primTrack->p() ) {
            tC.pop_back();
            checkEnergy(primTrack,tC);
    }
 }

void NuclearVertexBuilder::cleanTrackCollection	(	const reco::TrackRef &	primTrack,
		std::vector< reco::TrackRef > &	tC
	)		const

private

Definition at line 199 of file NuclearVertexBuilder.cc.

References i, isGoodSecondaryTrack(), TrackingRecHit::isValid(), j, LogDebug, shareFrac_, TrackingRecHit::sharesInput(), and TrackingRecHit::some.

Referenced by build().

                                                                                     {
 
     // inspired from FinalTrackSelector (S. Wagner) modified by P. Janot
     LogDebug("NuclearInteractionMaker") << "cleanTrackCollection number of input tracks : " << tC.size();
    std::map<std::vector<reco::TrackRef>::const_iterator, std::vector<const TrackingRecHit*> > rh;
 
     // first remove bad quality tracks and create map
     std::vector<bool> selected(tC.size(), false);
     int i=0;
     for (std::vector<reco::TrackRef>::const_iterator track=tC.begin(); track!=tC.end(); track++){
        if( isGoodSecondaryTrack(primTrack, *track)) { 
             selected[i]=true;
             trackingRecHit_iterator itB = (*track)->recHitsBegin();
             trackingRecHit_iterator itE = (*track)->recHitsEnd();
             for (trackingRecHit_iterator it = itB;  it != itE; ++it) {
                const TrackingRecHit* hit = &(**it);
                rh[track].push_back(hit);
             }
         }
        i++;
     }
 
     // then remove duplicated tracks
     i=-1;
     for (std::vector<reco::TrackRef>::const_iterator track=tC.begin(); track!=tC.end(); track++){
       i++;
       int j=-1;
       for (std::vector<reco::TrackRef>::const_iterator track2=tC.begin(); track2!=tC.end(); track2++){
         j++;
         if ((!selected[j])||(!selected[i]))continue;
         if ((j<=i))continue;
         int noverlap=0;
         std::vector<const TrackingRecHit*>& iHits = rh[track];
         for ( unsigned ih=0; ih<iHits.size(); ++ih ) {
           const TrackingRecHit* it = iHits[ih];
           if (it->isValid()){
             std::vector<const TrackingRecHit*>& jHits = rh[track2];
             for ( unsigned ih2=0; ih2<jHits.size(); ++ih2 ) {
             const TrackingRecHit* jt = jHits[ih2];
               if (jt->isValid()){
                 const TrackingRecHit* kt = jt;
                 if ( it->sharesInput(kt,TrackingRecHit::some) )noverlap++;
                }
              }
           }
         }
         float fi=float(noverlap)/float((*track)->recHitsSize()); 
         float fj=float(noverlap)/float((*track2)->recHitsSize());
         if ((fi>shareFrac_)||(fj>shareFrac_)){
           if (fi<fj){
             selected[j]=false;
           }else{
             if (fi>fj){
               selected[i]=false;
             }else{
               if ((*track)->normalizedChi2() > (*track2)->normalizedChi2()){selected[i]=false;}else{selected[j]=false;}
             }//end fi > or = fj
           }//end fi < fj
         }//end got a duplicate
       }//end track2 loop
     }//end track loop
 
    std::vector< reco::TrackRef > newTrackColl;
    i=0;
    for (std::vector<reco::TrackRef>::const_iterator track=tC.begin(); track!=tC.end(); track++){
          if( selected[i] ) newTrackColl.push_back( *track );
          ++i;
    }
    tC = newTrackColl;
 }

ClosestApproachInRPhi * NuclearVertexBuilder::closestApproach	(	const reco::TrackRef &	primTrack,
		const reco::TrackRef &	secTrack
	)		const

Definition at line 119 of file NuclearVertexBuilder.cc.

References ClosestApproachInRPhi::calculate(), getTrajectory(), NULL, and mps_update::status.

Referenced by FillVertexWithCrossingPoint(), isCompatible(), and isGoodSecondaryTrack().

                                                                                                                                 {
             FreeTrajectoryState primTraj = getTrajectory(primTrack);
             ClosestApproachInRPhi *theApproach = new ClosestApproachInRPhi();
             FreeTrajectoryState secTraj = getTrajectory(secTrack);
             bool status = theApproach->calculate(primTraj,secTraj);
             if( status ) { return theApproach; }
             else { 
                    return NULL;
             }
 }

bool NuclearVertexBuilder::FillVertexWithAdaptVtxFitter	(	const reco::TrackRef &	primTrack,
		const std::vector< reco::TrackRef > &	secTracks
	)

private

Definition at line 57 of file NuclearVertexBuilder.cc.

References TransientTrackBuilder::build(), cppFunctionSkipper::exception, i, reco::Vertex::isValid(), LogDebug, the_vertex, theTransientTrackBuilder, reco::Vertex::tracksSize(), AdaptiveVertexFitter::vertex(), VertexException::what(), and cms::Exception::what().

Referenced by build().

                                                                                                                                {
          std::vector<reco::TransientTrack> transientTracks;
          transientTracks.push_back( theTransientTrackBuilder->build(primTrack));
          // get the secondary track with the max number of hits
          for( unsigned short i=0; i != secTracks.size(); i++ ) {
               transientTracks.push_back( theTransientTrackBuilder->build( secTracks[i]) );
          }
          if( transientTracks.size() == 1 ) return  false;
          AdaptiveVertexFitter AVF;
          try {
             TransientVertex tv = AVF.vertex(transientTracks);
             the_vertex = reco::Vertex(tv);
          }
          catch(VertexException& exception){
             // AdaptivevertexFitter does not work
             LogDebug("NuclearInteractionMaker") << exception.what() << "\n";
             return false;
          }
          catch( cms::Exception& exception){
             // AdaptivevertexFitter does not work
             LogDebug("NuclearInteractionMaker") << exception.what() << "\n";
             return false;
          }
          if( the_vertex.isValid() ) {
               LogDebug("NuclearInteractionMaker") << "Try to build from AdaptiveVertexFitter with " << the_vertex.tracksSize() << " tracks";
               return true;
            }
          else return false;
 }

bool NuclearVertexBuilder::FillVertexWithCrossingPoint	(	const reco::TrackRef &	primTrack,
		const std::vector< reco::TrackRef > &	secTracks
	)

private

Definition at line 88 of file NuclearVertexBuilder.cc.

References reco::Vertex::add(), closestApproach(), ClosestApproachInRPhi::crossingPoint(), i, nhits, the_vertex, PV3DBase< T, PVType, FrameType >::x(), PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().

Referenced by build().

                                                                                                                               {
             // get the secondary track with the max number of hits
             unsigned short maxHits = 0; int indice=-1;
             for( unsigned short i=0; i < secTracks.size(); i++) {
                    // Add references to daughters
                    unsigned short nhits = secTracks[i]->numberOfValidHits();
                    if( nhits > maxHits ) { maxHits = nhits; indice=i; }
             }
 
             // Closest points
             if(indice == -1) return false;
 
             ClosestApproachInRPhi* theApproach = closestApproach( primTrack, secTracks[indice]);
             GlobalPoint crossing = theApproach->crossingPoint();
             delete theApproach;
 
             // Create vertex (creation point)
             // TODO: add error
             the_vertex = reco::Vertex(reco::Vertex::Point(crossing.x(),
                                                           crossing.y(),
                                                           crossing.z()),
                                       reco::Vertex::Error(), 0.,0.,0);
 
             the_vertex.add(reco::TrackBaseRef( primTrack ), 1.0);
             for( unsigned short i=0; i < secTracks.size(); i++) {
                  if( i==indice ) the_vertex.add(reco::TrackBaseRef( secTracks[i] ), 1.0);
                  else the_vertex.add(reco::TrackBaseRef( secTracks[i] ), 0.0);
             }
             return true;
 }

void NuclearVertexBuilder::FillVertexWithLastPrimHit	(	const reco::TrackRef &	primTrack,
		const std::vector< reco::TrackRef > &	secTracks
	)

private

Definition at line 45 of file NuclearVertexBuilder.cc.

References reco::Vertex::add(), i, LogDebug, and the_vertex.

Referenced by build().

                                                                                                                             {
    LogDebug("NuclearInteractionMaker") << "Vertex build from the end point of the primary track";
        the_vertex = reco::Vertex(reco::Vertex::Point(primTrack->outerPosition().x(),
                                          primTrack->outerPosition().y(),
                                          primTrack->outerPosition().z()),
                                          reco::Vertex::Error(), 0.,0.,0);
        the_vertex.add(reco::TrackBaseRef( primTrack ), 1.0);
        for( unsigned short i=0; i != secTracks.size(); i++) {
              the_vertex.add(reco::TrackBaseRef( secTracks[i] ), 0.0);
        }
 }

FreeTrajectoryState NuclearVertexBuilder::getTrajectory ( const reco::TrackRef & track ) const

private

Definition at line 27 of file NuclearVertexBuilder.cc.

References position, and theMagField.

Referenced by closestApproach().

 { 
   GlobalPoint position(track->vertex().x(),
                        track->vertex().y(),
                        track->vertex().z());
 
   GlobalVector momentum(track->momentum().x(),
                         track->momentum().y(),
                         track->momentum().z());
 
   GlobalTrajectoryParameters gtp(position,momentum,
                                  track->charge(),theMagField);
   
   FreeTrajectoryState fts(gtp);
 
   return fts; 
 } 

reco::Vertex NuclearVertexBuilder::getVertex ( ) const

inline

Definition at line 29 of file NuclearVertexBuilder.h.

References the_vertex.

29 { return the_vertex; }

NuclearVertexBuilder::the_vertex

reco::Vertex the_vertex

Definition: NuclearVertexBuilder.h:50

bool NuclearVertexBuilder::isCompatible ( const reco::TrackRef & secTrack ) const

Definition at line 164 of file NuclearVertexBuilder.cc.

References closestApproach(), isGoodSecondaryTrack(), minDistFromVtx_, reco::Vertex::position(), mps_fire::result, mathSSE::sqrt(), the_vertex, reco::Vertex::tracks_begin(), PV3DBase< T, PVType, FrameType >::x(), reco::Vertex::xError(), PV3DBase< T, PVType, FrameType >::y(), reco::Vertex::yError(), PV3DBase< T, PVType, FrameType >::z(), and reco::Vertex::zError().

                                                                            {
          
          reco::TrackRef primTrack = (*(the_vertex.tracks_begin())).castTo<reco::TrackRef>();
          ClosestApproachInRPhi *theApproach = closestApproach(primTrack, secTrack);
          bool result = false;
          if( theApproach ) {
            GlobalPoint crp = theApproach->crossingPoint();
            math::XYZPoint vtx = the_vertex.position();
            float dist = sqrt((crp.x()-vtx.x())*(crp.x()-vtx.x()) +
                         (crp.y()-vtx.y())*(crp.y()-vtx.y()) +
                         (crp.z()-vtx.z())*(crp.z()-vtx.z()));
 
            float distError = sqrt(the_vertex.xError()*the_vertex.xError() +
                                   the_vertex.yError()*the_vertex.yError() +
                                   the_vertex.zError()*the_vertex.zError());
  
            //std::cout << "Distance between Additional track and vertex =" << dist << " +/- " << distError << std::endl;
            // TODO : add condition on distance between last rechit of the primary and the first rec hit of the secondary
  
            result = (isGoodSecondaryTrack(secTrack, primTrack, theApproach->distance(), crp) 
                      && dist-distError<minDistFromVtx_);
          }
          delete theApproach;
          return result;
 }

bool NuclearVertexBuilder::isGoodSecondaryTrack	(	const reco::TrackRef &	primTrack,
		const reco::TrackRef &	secTrack
	)		const

private

Definition at line 130 of file NuclearVertexBuilder.cc.

References closestApproach(), ClosestApproachInRPhi::crossingPoint(), ClosestApproachInRPhi::distance(), and mps_fire::result.

Referenced by cleanTrackCollection(), and isCompatible().

                                                                                                                    {
            ClosestApproachInRPhi* theApproach = closestApproach(primTrack, secTrack);
            bool result = false;
            if(theApproach)
              result = isGoodSecondaryTrack(secTrack, primTrack, theApproach->distance() , theApproach->crossingPoint());
            delete theApproach;
            return result;
 } 

bool NuclearVertexBuilder::isGoodSecondaryTrack	(	const reco::TrackRef &	secTrack,
		const reco::TrackRef &	primTrack,
		const double &	distOfClosestApp,
		const GlobalPoint &	crossPoint
	)		const

private

Definition at line 139 of file NuclearVertexBuilder.cc.

References chi2Cut_, gather_cfg::cout, DPtovPtCut_, minDistFromPrim_, p1, p2, and PV3DBase< T, PVType, FrameType >::perp().

                                                                                        {
           float TRACKER_RADIUS=129;
           double pt2 = secTrack->pt();
           double Dpt2 = secTrack->ptError();
           double p1 = primTrack->p();
           double Dp1 = primTrack->qoverpError()*p1*p1;
           double p2 = secTrack->p();
           double Dp2 = secTrack->qoverpError()*p2*p2;
           std::cout << "1)" << distOfClosestApp << " < " << minDistFromPrim_ << " " << (distOfClosestApp < minDistFromPrim_)  << "\n";
           std::cout << "2)" << secTrack->normalizedChi2() << " < " << chi2Cut_ << " " << (secTrack->normalizedChi2() < chi2Cut_) << "\n";
           std::cout << "3)" << crossPoint.perp() << " < " << TRACKER_RADIUS << " " << (crossPoint.perp() < TRACKER_RADIUS) << "\n";
           std::cout << "4)" << (Dpt2/pt2) << " < " << DPtovPtCut_ << " " << ((Dpt2/pt2) < DPtovPtCut_)  << "\n";
           std::cout << "5)" << (p2-2*Dp2) << " < " << (p1+2*Dp1) << " " << ((p2-2*Dp2) < (p1+2*Dp1))<< "\n";
           if( distOfClosestApp < minDistFromPrim_ &&
               secTrack->normalizedChi2() < chi2Cut_ && 
               crossPoint.perp() < TRACKER_RADIUS && 
               (Dpt2/pt2) < DPtovPtCut_ &&
               (p2-2*Dp2) < (p1+2*Dp1)) return true;
           else return false;
 }