#include <RecoTracker/NuclearSeedGenerator/plugin/NuclearTrackCorrector.cc>

Inheritance diagram for NuclearTrackCorrector:

Public Types
typedef TrackProducerAlgorithm < reco::Track > ::AlgoProductCollection	AlgoProductCollection

typedef TransientTrackingRecHit::ConstRecHitContainer	ConstRecHitContainer

typedef edm::Ref < TrackCandidateCollection >	TrackCandidateRef

typedef edm::Ref < TrajectoryCollection >	TrajectoryRef

typedef edm::RefVector < TrajectorySeedCollection >	TrajectorySeedRefVector

Public Types inherited from edm::EDProducer
typedef EDProducer	ModuleType

Public Types inherited from edm::ProducerBase
typedef ProductRegistryHelper::TypeLabelList	TypeLabelList

Public Types inherited from edm::EDConsumerBase
typedef ProductLabels	Labels

Public Member Functions
	NuclearTrackCorrector (const edm::ParameterSet &)

	~NuclearTrackCorrector ()

Public Member Functions inherited from edm::EDProducer
	EDProducer ()

ModuleDescription const &	moduleDescription () const

virtual	~EDProducer ()

Public Member Functions inherited from edm::ProducerBase
void	callWhenNewProductsRegistered (std::function< void(BranchDescription const &)> const &func)

	ProducerBase ()

void	registerProducts (ProducerBase , ProductRegistry , ModuleDescription const &)

std::function< void(BranchDescription const &)>	registrationCallback () const
	used by the fwk to register list of products More...

virtual	~ProducerBase ()

Public Member Functions inherited from edm::EDConsumerBase
std::vector< ConsumesInfo >	consumesInfo () const

	EDConsumerBase ()

ProductHolderIndexAndSkipBit	indexFrom (EDGetToken, BranchType, TypeID const &) const

void	itemsMayGet (BranchType, std::vector< ProductHolderIndexAndSkipBit > &) const

void	itemsToGet (BranchType, std::vector< ProductHolderIndexAndSkipBit > &) const

std::vector < ProductHolderIndexAndSkipBit > const &	itemsToGetFromEvent () const

void	labelsForToken (EDGetToken iToken, Labels &oLabels) const

void	modulesDependentUpon (const std::string &iProcessName, std::vector< const char * > &oModuleLabels) const

void	modulesWhoseProductsAreConsumed (std::vector< ModuleDescription const * > &modules, ProductRegistry const &preg, std::map< std::string, ModuleDescription const * > const &labelsToDesc, std::string const &processName) const

bool	registeredToConsume (ProductHolderIndex, bool, BranchType) const

bool	registeredToConsumeMany (TypeID const &, BranchType) const

void	updateLookup (BranchType iBranchType, ProductHolderIndexHelper const &)

virtual	~EDConsumerBase ()

Private Member Functions
virtual void	endJob ()

TrajectoryStateOnSurface	getInitialState (const reco::Track theT, TransientTrackingRecHit::RecHitContainer &hits, const TrackingGeometry theG, const MagneticField *theMF)
	Calculate the inital state to be used to buil the track. More...

reco::TrackExtra	getNewTrackExtra (const AlgoProductCollection &algoresults)
	get a new TrackExtra from an AlgoProductCollection More...

bool	getTrackFromTrajectory (const Trajectory &newTraj, const TrajectoryRef &initialTrajRef, AlgoProductCollection &algoResults)
	Get the refitted track from the Trajectory. More...

bool	newTrajNeeded (Trajectory &newtrajectory, const TrajectoryRef &trajRef, const reco::NuclearInteraction &ni)
	check if the trajectory has to be refitted and get the new trajectory More...

virtual void	produce (edm::Event &, const edm::EventSetup &) override

void	swap_map (const edm::Handle< TrajectoryCollection > &trajColl, std::map< reco::TrackRef, edm::Ref< TrajectoryCollection > > &result)

Private Attributes
edm::ParameterSet	conf_

std::vector< std::pair < unsigned int, unsigned int > >	Indice_Map

int	int_Input_Hit_Distance

int	KeepOnlyCorrectedTracks

const TrajTrackAssociationCollection *	m_TrajToTrackCollection

std::string	str_Input_NuclearInteraction

std::string	str_Input_Trajectory

TrackProducerAlgorithm < reco::Track > *	theAlgo

edm::ESHandle< TrajectoryFitter >	theFitter

edm::ESHandle< TrackerGeometry >	theG

TransientInitialStateEstimator *	theInitialState

edm::ESHandle< MagneticField >	theMF

edm::ESHandle< Propagator >	thePropagator

int	verbosity

Additional Inherited Members
Static Public Member Functions inherited from edm::EDProducer
static const std::string &	baseType ()

static void	fillDescriptions (ConfigurationDescriptions &descriptions)

static void	prevalidate (ConfigurationDescriptions &descriptions)

Protected Member Functions inherited from edm::EDConsumerBase
template<typename ProductType , BranchType B = InEvent>
EDGetTokenT< ProductType >	consumes (edm::InputTag const &tag)

EDGetToken	consumes (const TypeToGet &id, edm::InputTag const &tag)

template<BranchType B>
EDGetToken	consumes (TypeToGet const &id, edm::InputTag const &tag)

ConsumesCollector	consumesCollector ()
	Use a ConsumesCollector to gather consumes information from helper functions. More...

template<typename ProductType , BranchType B = InEvent>
void	consumesMany ()

void	consumesMany (const TypeToGet &id)

template<BranchType B>
void	consumesMany (const TypeToGet &id)

template<typename ProductType , BranchType B = InEvent>
EDGetTokenT< ProductType >	mayConsume (edm::InputTag const &tag)

EDGetToken	mayConsume (const TypeToGet &id, edm::InputTag const &tag)

template<BranchType B>
EDGetToken	mayConsume (const TypeToGet &id, edm::InputTag const &tag)

Detailed Description

Description: <one line="" class="" summary>="">

Implementation: <Notes on="" implementation>="">

Definition at line 74 of file NuclearTrackCorrector.h.

Member Typedef Documentation

typedef TrackProducerAlgorithm<reco::Track>::AlgoProductCollection NuclearTrackCorrector::AlgoProductCollection

Definition at line 81 of file NuclearTrackCorrector.h.

typedef TransientTrackingRecHit::ConstRecHitContainer NuclearTrackCorrector::ConstRecHitContainer

Definition at line 80 of file NuclearTrackCorrector.h.

typedef edm::Ref<TrackCandidateCollection> NuclearTrackCorrector::TrackCandidateRef

Definition at line 79 of file NuclearTrackCorrector.h.

typedef edm::Ref<TrajectoryCollection> NuclearTrackCorrector::TrajectoryRef

Definition at line 78 of file NuclearTrackCorrector.h.

typedef edm::RefVector<TrajectorySeedCollection> NuclearTrackCorrector::TrajectorySeedRefVector

Definition at line 77 of file NuclearTrackCorrector.h.

Constructor & Destructor Documentation

NuclearTrackCorrector::NuclearTrackCorrector ( const edm::ParameterSet & iConfig )

explicit

Definition at line 35 of file NuclearTrackCorrector.cc.

References edm::ParameterSet::getParameter(), KeepOnlyCorrectedTracks, str_Input_NuclearInteraction, str_Input_Trajectory, AlCaHLTBitMon_QueryRunRegistry::string, theAlgo, and verbosity.

                                                                            :
 conf_(iConfig),
 theInitialState(0)
 {
      str_Input_Trajectory           = iConfig.getParameter<std::string>     ("InputTrajectory");
      str_Input_NuclearInteraction   = iConfig.getParameter<std::string>     ("InputNuclearInteraction");
      verbosity              = iConfig.getParameter<int>             ("Verbosity");
      KeepOnlyCorrectedTracks        = iConfig.getParameter<bool>             ("KeepOnlyCorrectedTracks");
 
 
      theAlgo = new TrackProducerAlgorithm<reco::Track>(iConfig);
 
      produces< TrajectoryCollection >();
      produces< TrajectoryToTrajectoryMap >();
 
      produces< reco::TrackExtraCollection >();
      produces< reco::TrackCollection >();       
      produces< TrackToTrajectoryMap >();
 
      produces< TrackToTrackMap >();
 }

NuclearTrackCorrector::~NuclearTrackCorrector ( )

Definition at line 58 of file NuclearTrackCorrector.cc.

59 {

60 }

Member Function Documentation

void NuclearTrackCorrector::endJob ( void )

privatevirtual

Reimplemented from edm::EDProducer.

Definition at line 199 of file NuclearTrackCorrector.cc.

199 {

200 }

TrajectoryStateOnSurface NuclearTrackCorrector::getInitialState	(	const reco::Track *	theT,
		TransientTrackingRecHit::RecHitContainer &	hits,
		const TrackingGeometry *	theG,
		const MagneticField *	theMF
	)

private

Calculate the inital state to be used to buil the track.

Definition at line 310 of file NuclearTrackCorrector.cc.

References TrajectoryStateOnSurface::globalPosition(), trajectoryStateTransform::innerStateOnSurface(), TrajectoryStateOnSurface::localError(), TrajectoryStateOnSurface::localParameters(), mag2(), trajectoryStateTransform::outerStateOnSurface(), TrajectoryStateOnSurface::rescaleError(), TrajectoryStateOnSurface::surface(), and theMF.

Referenced by getTrackFromTrajectory().

                                                                                              {
 
   TrajectoryStateOnSurface theInitialStateForRefitting;
   //the starting state is the state closest to the first hit along seedDirection.
   
   //avoiding to use transientTrack, it should be faster;
   TrajectoryStateOnSurface innerStateFromTrack=trajectoryStateTransform::innerStateOnSurface(*theT,*theG,theMF);
   TrajectoryStateOnSurface outerStateFromTrack=trajectoryStateTransform::outerStateOnSurface(*theT,*theG,theMF);
   TrajectoryStateOnSurface initialStateFromTrack = 
     ( (innerStateFromTrack.globalPosition()-hits.front()->globalPosition()).mag2() <
       (outerStateFromTrack.globalPosition()-hits.front()->globalPosition()).mag2() ) ? 
     innerStateFromTrack: outerStateFromTrack;       
   
   // error is rescaled, but correlation are kept.
   initialStateFromTrack.rescaleError(100);
   theInitialStateForRefitting = TrajectoryStateOnSurface(initialStateFromTrack.localParameters(),
                                                          initialStateFromTrack.localError(),                  
                                                          initialStateFromTrack.surface(),
                                                          theMF); 
   return theInitialStateForRefitting;
 }

reco::TrackExtra NuclearTrackCorrector::getNewTrackExtra ( const AlgoProductCollection & algoresults )

private

get a new TrackExtra from an AlgoProductCollection

Definition at line 276 of file NuclearTrackCorrector.cc.

References alongMomentum, TrajectoryStateOnSurface::curvilinearError(), Trajectory::direction(), Trajectory::firstMeasurement(), TrajectoryStateOnSurface::globalParameters(), Trajectory::lastMeasurement(), GlobalTrajectoryParameters::momentum(), AlCaHLTBitMon_ParallelJobs::p, GlobalTrajectoryParameters::position(), TrajectoryMeasurement::recHit(), TrajectoryMeasurement::updatedState(), findQualityFiles::v, PV3DBase< T, PVType, FrameType >::x(), PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().

Referenced by produce().

                                                                                                {
                 Trajectory* theTraj          = algoResults[0].first;
                 PropagationDirection seedDir = algoResults[0].second.second;
 
                 TrajectoryStateOnSurface outertsos;
                 TrajectoryStateOnSurface innertsos;
                 unsigned int innerId, outerId;
                 if (theTraj->direction() == alongMomentum) {
                   outertsos = theTraj->lastMeasurement().updatedState();
                   innertsos = theTraj->firstMeasurement().updatedState();
                   outerId   = theTraj->lastMeasurement().recHit()->geographicalId().rawId();
                   innerId   = theTraj->firstMeasurement().recHit()->geographicalId().rawId();
                 } else {
                   outertsos = theTraj->firstMeasurement().updatedState();
                   innertsos = theTraj->lastMeasurement().updatedState();
                   outerId   = theTraj->firstMeasurement().recHit()->geographicalId().rawId();
                   innerId   = theTraj->lastMeasurement().recHit()->geographicalId().rawId();
                 }
 
                 GlobalPoint v = outertsos.globalParameters().position();
                 GlobalVector p = outertsos.globalParameters().momentum();
                 math::XYZVector outmom( p.x(), p.y(), p.z() );
                 math::XYZPoint  outpos( v.x(), v.y(), v.z() );
                 v = innertsos.globalParameters().position();
                 p = innertsos.globalParameters().momentum();
                 math::XYZVector inmom( p.x(), p.y(), p.z() );
                 math::XYZPoint  inpos( v.x(), v.y(), v.z() );
 
                 return reco::TrackExtra (outpos, outmom, true, inpos, inmom, true,
                                         outertsos.curvilinearError(), outerId,
                                         innertsos.curvilinearError(), innerId, seedDir);
 
 }

bool NuclearTrackCorrector::getTrackFromTrajectory	(	const Trajectory &	newTraj,
		const TrajectoryRef &	initialTrajRef,
		AlgoProductCollection &	algoResults
	)

private

Get the refitted track from the Trajectory.

Definition at line 236 of file NuclearTrackCorrector.cc.

References TrackProducerAlgorithm< T >::buildTrack(), getInitialState(), h, LogDebug, m_TrajToTrackCollection, ndof, edm::ESHandle< class >::product(), Trajectory::seed(), theAlgo, theFitter, theG, theMF, and thePropagator.

Referenced by produce().

                                                                                                                                                       {
 
         const Trajectory*  it = &newTraj;
 
         TransientTrackingRecHit::RecHitContainer hits;
         it->validRecHits( hits  );
         
 
     float ndof=0;
         for(unsigned int h=0 ; h<hits.size() ; h++)
         {
             if( hits[h]->isValid() )
             {
                 ndof = ndof + hits[h]->dimension() * hits[h]->weight();
             }
             else {
                  LogDebug("NuclearSeedGenerator") << " HIT IS INVALID ???";
             }
         }
 
 
         ndof = ndof - 5;
         reco::TrackRef  theT     = m_TrajToTrackCollection->operator[]( initialTrajRef );
         LogDebug("NuclearSeedGenerator") << " TrackCorrector - number of valid hits" << hits.size() << "\n"
                                          << "                - number of hits from Track " << theT->recHitsSize() << "\n"
                                          << "                - number of valid hits from initial track " << theT->numberOfValidHits();
 
 
         if(  hits.size() > 1){
 
         TrajectoryStateOnSurface theInitialStateForRefitting = getInitialState(&(*theT),hits,theG.product(),theMF.product()
 );
 
            reco::BeamSpot bs;
            return theAlgo->buildTrack(theFitter.product(), thePropagator.product(), algoResults, hits, theInitialStateForRefitting ,it->seed(), ndof, bs, theT->seedRef());
          }
 
     return false;
 }

bool NuclearTrackCorrector::newTrajNeeded	(	Trajectory &	newtrajectory,
		const TrajectoryRef &	trajRef,
		const reco::NuclearInteraction &	ni
	)

private

check if the trajectory has to be refitted and get the new trajectory

Definition at line 202 of file NuclearTrackCorrector.cc.

References alongMomentum, LogDebug, visualization-live-secondInstance_cfg::m, PV3DBase< T, PVType, FrameType >::mag(), reco::Vertex::position(), Trajectory::push(), mathSSE::sqrt(), theG, verbosity, and reco::NuclearInteraction::vertex().

Referenced by produce().

                                                                                                                                {
 
         bool needNewTraj=false;
         reco::Vertex::Point vtx_pos = ni.vertex().position();
         double vtx_pos_mag = sqrt (vtx_pos.X()*vtx_pos.X()+vtx_pos.Y()*vtx_pos.Y()+vtx_pos.Z()*vtx_pos.Z());
         if(verbosity>=2) printf("Nuclear Interaction pos = %f\n",vtx_pos_mag );
 
 
         newtrajectory = Trajectory(trajRef->seed(), alongMomentum);
 
         // Look all the Hits of the trajectory and keep only Hits before seeds
         Trajectory::DataContainer Measurements = trajRef->measurements();
         if(verbosity>=2)LogDebug("NuclearTrackCorrector")<<"Size of Measurements  = "<<Measurements.size();
 
         for(unsigned int m=Measurements.size()-1 ;m!=(unsigned int)-1 ; m--){
 
                 if(!Measurements[m].recHit()->isValid() )continue;
                 GlobalPoint hit_pos = theG->idToDet(Measurements[m].recHit()->geographicalId())->surface().toGlobal(Measurements[m].recHit()->localPosition());
 
                 if(verbosity>=2)printf("Hit pos = %f",hit_pos.mag() );
 
                 if(hit_pos.mag()>vtx_pos_mag){
                          if(verbosity>=2)printf(" X ");
                          needNewTraj=true;
                 }else{
                         newtrajectory.push(Measurements[m]);
                 }
                 if(verbosity>=2)printf("\n");
         }
 
     return needNewTraj;
 }

void NuclearTrackCorrector::produce	(	edm::Event &	iEvent,
		const edm::EventSetup &	iSetup
	)

overrideprivatevirtual

Implements edm::EDProducer.

Definition at line 63 of file NuclearTrackCorrector.cc.

References edm::RefToBase< T >::castTo(), conf_, event(), plotBeamSpotDB::first, edm::EventSetup::get(), edm::Event::getByLabel(), getNewTrackExtra(), edm::ParameterSet::getParameter(), edm::Event::getRefBeforePut(), getTrackFromTrajectory(), i, Indice_Map, edm::AssociationMap< Tag >::insert(), KeepOnlyCorrectedTracks, reco::NuclearInteraction::likelihood(), LogDebug, m_TrajToTrackCollection, newTrajNeeded(), reco::NuclearInteraction::primaryTrack(), edm::Handle< T >::product(), edm::Event::put(), edm::AssociationMap< Tag >::refProd(), edm::second(), str_Input_NuclearInteraction, str_Input_Trajectory, AlCaHLTBitMon_QueryRunRegistry::string, swap_map(), theFitter, theG, theMF, thePropagator, edm::helpers::KeyVal< K, V >::val, and verbosity.

 {
   // Create Output Collections
   // --------------------------------------------------------------------------------------------------
   std::auto_ptr<TrajectoryCollection>           Output_traj          ( new TrajectoryCollection );
   std::auto_ptr<TrajectoryToTrajectoryMap>      Output_trajmap       ( new TrajectoryToTrajectoryMap );
 
   std::auto_ptr<reco::TrackExtraCollection> Output_trackextra    ( new reco::TrackExtraCollection );
   std::auto_ptr<reco::TrackCollection>          Output_track         ( new reco::TrackCollection );
   std::auto_ptr<TrackToTrajectoryMap>           Output_trackmap      ( new TrackToTrajectoryMap );
 
 
 
 
 
 
   // Load Reccord
   // --------------------------------------------------------------------------------------------------
   std::string fitterName = conf_.getParameter<std::string>("Fitter");   
   iSetup.get<TrajectoryFitter::Record>().get(fitterName,theFitter);
 
   std::string propagatorName = conf_.getParameter<std::string>("Propagator");   
   iSetup.get<TrackingComponentsRecord>().get(propagatorName,thePropagator);
 
   iSetup.get<TrackerDigiGeometryRecord>().get(theG);
 
   reco::TrackExtraRefProd rTrackExtras = iEvent.getRefBeforePut<reco::TrackExtraCollection>();
 
    iSetup.get<IdealMagneticFieldRecord>().get(theMF); 
 
   // Load Inputs
   // --------------------------------------------------------------------------------------------------
   edm::Handle< TrajectoryCollection > temp_m_TrajectoryCollection;
   iEvent.getByLabel( str_Input_Trajectory.c_str(), temp_m_TrajectoryCollection );
   const TrajectoryCollection m_TrajectoryCollection = *(temp_m_TrajectoryCollection.product());
 
   edm::Handle< NuclearInteractionCollection > temp_m_NuclearInteractionCollection;
   iEvent.getByLabel( str_Input_NuclearInteraction.c_str(), temp_m_NuclearInteractionCollection );
   const NuclearInteractionCollection m_NuclearInteractionCollection = *(temp_m_NuclearInteractionCollection.product());
 
   edm::Handle< TrajTrackAssociationCollection > h_TrajToTrackCollection;
   iEvent.getByLabel( str_Input_Trajectory.c_str(), h_TrajToTrackCollection );
   m_TrajToTrackCollection = h_TrajToTrackCollection.product();
 
 
   // Correct the trajectories (Remove trajectory's hits that are located after the nuclear interacion)
   // --------------------------------------------------------------------------------------------------
   if(verbosity>=1){
     LogDebug("NuclearTrackCorrector")
       <<"Number of trajectories                    = "<<m_TrajectoryCollection.size() <<std::endl
       <<"Number of nuclear interactions            = "<<m_NuclearInteractionCollection.size();
   }
 
   std::map<reco::TrackRef,TrajectoryRef> m_TrackToTrajMap; 
   swap_map(temp_m_TrajectoryCollection, m_TrackToTrajMap);
 
   for(unsigned int i = 0 ; i < m_NuclearInteractionCollection.size() ; i++)
   {
         reco::NuclearInteraction ni =  m_NuclearInteractionCollection[i];
         if( ni.likelihood()<0.4) continue;
 
         reco::TrackRef primTrackRef = ni.primaryTrack().castTo<reco::TrackRef>();
 
     TrajectoryRef  trajRef = m_TrackToTrajMap[primTrackRef];
 
         Trajectory newTraj;
         if( newTrajNeeded(newTraj, trajRef, ni) ) {
 
           AlgoProductCollection   algoResults; 
           bool isOK = getTrackFromTrajectory( newTraj , trajRef, algoResults);
 
           if( isOK ) {
 
         pair<unsigned int, unsigned int> tempory_pair;
         tempory_pair.first  = Output_track->size();
         tempory_pair.second = i;
         Indice_Map.push_back(tempory_pair);
 
                 reco::TrackExtraRef teref= reco::TrackExtraRef ( rTrackExtras, i );
                 reco::TrackExtra newTrackExtra = getNewTrackExtra(algoResults);
                 (algoResults[0].second.first)->setExtra( teref ); 
 
                 Output_track->push_back(*algoResults[0].second.first);        
                 Output_trackextra->push_back( newTrackExtra );
             Output_traj->push_back(newTraj);
 
           }
         }
         else {
            if(!KeepOnlyCorrectedTracks) {
                 Output_track->push_back(*primTrackRef);
             Output_trackextra->push_back( *primTrackRef->extra() );
                 Output_traj->push_back(*trajRef);
            }
         }
 
   }
   const edm::OrphanHandle<TrajectoryCollection>     Handle_traj = iEvent.put(Output_traj);
   const edm::OrphanHandle<reco::TrackCollection> Handle_tracks = iEvent.put(Output_track);
   iEvent.put(Output_trackextra);
 
   // Make Maps between elements
   // --------------------------------------------------------------------------------------------------
   if(Handle_tracks->size() != Handle_traj->size() )
   {
      printf("ERROR Handle_tracks->size() != Handle_traj->size() \n");
      return;
   }
 
   std::auto_ptr<TrackToTrackMap>            Output_tracktrackmap ( new TrackToTrackMap(Handle_tracks, m_TrajToTrackCollection->refProd().val) );
 
   for(unsigned int i = 0 ; i < Indice_Map.size() ; i++)
   {
         TrajectoryRef      InTrajRef    ( temp_m_TrajectoryCollection, Indice_Map[i].second );
         TrajectoryRef      OutTrajRef   ( Handle_traj, Indice_Map[i].first );
         reco::TrackRef     TrackRef     ( Handle_tracks, Indice_Map[i].first );
 
         Output_trajmap ->insert(OutTrajRef,InTrajRef);
         Output_trackmap->insert(TrackRef,InTrajRef);
 
         try{
                 reco::TrackRef  PrimaryTrackRef     = m_TrajToTrackCollection->operator[]( InTrajRef );
             Output_tracktrackmap->insert(TrackRef,PrimaryTrackRef);
         }catch(edm::Exception event){}
     
   }
   iEvent.put(Output_trajmap);
   iEvent.put(Output_trackmap);
   iEvent.put(Output_tracktrackmap);
 
 
   if(verbosity>=3)printf("-----------------------\n");
 }

void NuclearTrackCorrector::swap_map	(	const edm::Handle< TrajectoryCollection > &	trajColl,
		std::map< reco::TrackRef, edm::Ref< TrajectoryCollection > > &	result
	)

private

Definition at line 335 of file NuclearTrackCorrector.cc.

References i, m_TrajToTrackCollection, and query::result.

Referenced by produce().

                                                                                                                                                        {
   for(unsigned int i = 0 ; i < trajColl->size() ; i++)
   {
      TrajectoryRef      InTrajRef    ( trajColl, i);
      reco::TrackRef  PrimaryTrackRef     = m_TrajToTrackCollection->operator[]( InTrajRef );
      result[ PrimaryTrackRef ] = InTrajRef;
   }
 }