#include <GlobalTrackQualityProducer.h>

Inheritance diagram for GlobalTrackQualityProducer:

Public Member Functions
	GlobalTrackQualityProducer (const edm::ParameterSet &iConfig)
virtual	~GlobalTrackQualityProducer ()
Private Member Functions
virtual std::pair< double, double >	kink (Trajectory &muon) const
virtual std::pair< double, double >	newChi2 (Trajectory &muon) const
virtual void	produce (edm::Event &, const edm::EventSetup &)
virtual double	trackProbability (Trajectory &track) const
Private Attributes
edm::InputTag	inputCollection_
edm::InputTag	inputLinksCollection_
MeasurementEstimator *	theEstimator
GlobalMuonTrackMatcher *	theGlbMatcher
GlobalMuonRefitter *	theGlbRefitter
MuonServiceProxy *	theService

Detailed Description

Definition at line 26 of file GlobalTrackQualityProducer.h.

Constructor & Destructor Documentation

GlobalTrackQualityProducer::GlobalTrackQualityProducer ( const edm::ParameterSet & iConfig ) [explicit]

Definition at line 28 of file GlobalTrackQualityProducer.cc.

References Chi2MeasurementEstimatorESProducer_cfi::Chi2MeasurementEstimator, edm::ParameterSet::getParameter(), GlobalMuonRefitter_cff::GlobalMuonRefitter, ExpressReco_HICollisions_FallBack::GlobalMuonTrackMatcher, MuonServiceProxy_cff::MuonServiceProxy, ExpressReco_HICollisions_FallBack::nSigma, theEstimator, theGlbMatcher, theGlbRefitter, and theService.

                                                                                    :
  inputCollection_(iConfig.getParameter<edm::InputTag>("InputCollection")),inputLinksCollection_(iConfig.getParameter<edm::InputTag>("InputLinksCollection")),theService(0),theGlbRefitter(0),theGlbMatcher(0)
{
  // service parameters
  edm::ParameterSet serviceParameters = iConfig.getParameter<edm::ParameterSet>("ServiceParameters");
  theService = new MuonServiceProxy(serviceParameters);     
  
  // TrackRefitter parameters
  edm::ParameterSet refitterParameters = iConfig.getParameter<edm::ParameterSet>("RefitterParameters");
  theGlbRefitter = new GlobalMuonRefitter(refitterParameters, theService);

  edm::ParameterSet trackMatcherPSet = iConfig.getParameter<edm::ParameterSet>("GlobalMuonTrackMatcher");
  theGlbMatcher = new GlobalMuonTrackMatcher(trackMatcherPSet,theService);

  double maxChi2 = iConfig.getParameter<double>("MaxChi2");
  double nSigma = iConfig.getParameter<double>("nSigma");
  theEstimator = new Chi2MeasurementEstimator(maxChi2,nSigma);
 
  produces<edm::ValueMap<reco::MuonQuality> >();
}

GlobalTrackQualityProducer::~GlobalTrackQualityProducer ( ) [virtual]

Definition at line 49 of file GlobalTrackQualityProducer.cc.

References theEstimator, theGlbMatcher, theGlbRefitter, and theService.

                                                        {
  if (theService) delete theService;
  if (theGlbRefitter) delete theGlbRefitter;
  if (theGlbMatcher) delete theGlbMatcher;
  if (theEstimator) delete theEstimator;
}

Member Function Documentation

std::pair< double, double > GlobalTrackQualityProducer::kink ( Trajectory & muon ) const [private, virtual]

Definition at line 166 of file GlobalTrackQualityProducer.cc.

References diffTreeTool::diff, error, TrajectoryStateOnSurface::globalPosition(), edm::detail::isnan(), TrajectoryStateOnSurface::isValid(), m, M_PI, Trajectory::measurements(), convertSQLiteXML::ok, PV3DBase< T, PVType, FrameType >::phi(), GlobalErrorBase< T, ErrorWeightType >::phierr(), dt_offlineAnalysis_common_cff::reco, query::result, asciidump::s, and DetId::Tracker.

Referenced by produce().

                                                                              {

  const std::string theCategory = "Muon|RecoMuon|GlobalTrackQualityProducer";
   
  using namespace std;
  using namespace edm;
  using namespace reco;
 
  double result = 0.0;
  double resultGlb = 0.0;

     
  typedef TransientTrackingRecHit::ConstRecHitPointer   ConstRecHitPointer;
  typedef ConstRecHitPointer RecHit;
  typedef std::vector<TrajectoryMeasurement>::const_iterator TMI;


  vector<TrajectoryMeasurement> meas = muon.measurements();
  
  for ( TMI m = meas.begin(); m != meas.end(); m++ ) {
    TransientTrackingRecHit::ConstRecHitPointer hit = m->recHit();

    //not used    double estimate = 0.0;

    RecHit rhit = (*m).recHit();
    bool ok = false;
    if ( rhit->isValid() ) {
      if(DetId::Tracker == rhit->geographicalId().det()) ok = true;
    }

    //if ( !ok ) continue;
    
    const TrajectoryStateOnSurface& tsos = (*m).predictedState();


    if ( tsos.isValid() && rhit->isValid() && rhit->hit()->isValid()
         && !std::isinf(rhit->localPositionError().xx()) //this is paranoia induced by reported case
         && !std::isinf(rhit->localPositionError().xy()) //it's better to track down the origin of bad numbers
         && !std::isinf(rhit->localPositionError().yy())
         && !std::isnan(rhit->localPositionError().xx()) //this is paranoia induced by reported case
         && !std::isnan(rhit->localPositionError().xy()) //it's better to track down the origin of bad numbers
         && !std::isnan(rhit->localPositionError().yy())
         ) {

      double phi1 = tsos.globalPosition().phi();
      if ( phi1 < 0 ) phi1 = 2*M_PI + phi1;

      double phi2 = rhit->globalPosition().phi();
      if ( phi2 < 0 ) phi2 = 2*M_PI + phi2;

      double diff = fabs(phi1 - phi2);
      if ( diff > M_PI ) diff = 2*M_PI - diff;

      GlobalPoint hitPos = rhit->globalPosition();

      GlobalError hitErr = rhit->globalPositionError();
      //LogDebug(theCategory)<<"hitPos " << hitPos;
      double error = hitErr.phierr(hitPos);  // error squared

      double s = ( error > 0.0 ) ? (diff*diff)/error : (diff*diff);

      if(ok) result += s;
      resultGlb += s;
    }
    
  }
  
  
  return std::pair<double,double>(result,resultGlb);
  
}

std::pair< double, double > GlobalTrackQualityProducer::newChi2 ( Trajectory & muon ) const [private, virtual]

Definition at line 238 of file GlobalTrackQualityProducer.cc.

References MeasurementEstimator::estimate(), TrajectoryStateOnSurface::isValid(), m, Trajectory::measurements(), DetId::Muon, dt_offlineAnalysis_common_cff::reco, theEstimator, and DetId::Tracker.

Referenced by produce().

                                                                                 {
  const std::string theCategory = "Muon|RecoMuon|GlobalTrackQualityProducer";

  using namespace std;
  using namespace edm;
  using namespace reco;

  double muChi2 = 0.0;
  double tkChi2 = 0.0;
  unsigned int muNdof = 0;
  unsigned int tkNdof = 0;
  
  typedef TransientTrackingRecHit::ConstRecHitPointer   ConstRecHitPointer;
  typedef ConstRecHitPointer RecHit;
  typedef vector<TrajectoryMeasurement>::const_iterator TMI;

  vector<TrajectoryMeasurement> meas = muon.measurements();

  for ( TMI m = meas.begin(); m != meas.end(); m++ ) {
    TransientTrackingRecHit::ConstRecHitPointer hit = m->recHit();
    const TrajectoryStateOnSurface& uptsos = (*m).updatedState();
    TransientTrackingRecHit::RecHitPointer preciseHit = hit->clone(uptsos);
    double estimate = 0.0;
    if (preciseHit->isValid() && uptsos.isValid()) {
      estimate = theEstimator->estimate(uptsos, *preciseHit ).second;
    }
    
    //LogTrace(theCategory) << "estimate " << estimate << " TM.est " << m->estimate();
    double tkDiff = 0.0;
    double staDiff = 0.0;
    if ( hit->isValid() &&  (hit->geographicalId().det()) == DetId::Tracker ) {
      tkChi2 += estimate;
      tkDiff = estimate - m->estimate();
      tkNdof += hit->dimension();
    }
    if ( hit->isValid() &&  (hit->geographicalId().det()) == DetId::Muon ) {
      muChi2 += estimate;
      staDiff = estimate - m->estimate();
      muNdof += hit->dimension();
    }
  }
  
  if (tkNdof < 6 ) tkChi2 = tkChi2; // or should I set it to  a large number ?
  else tkChi2 /= (tkNdof-5.);

  if (muNdof < 6 ) muChi2 = muChi2; // or should I set it to  a large number ?
  else muChi2 /= (muNdof-5.);

  return std::pair<double,double>(tkChi2,muChi2);
       
}

void GlobalTrackQualityProducer::produce	(	edm::Event &	iEvent,
		const edm::EventSetup &	iSetup
	)		`[private, virtual]`

Implements edm::EDProducer.

Definition at line 57 of file GlobalTrackQualityProducer.cc.

{
  const std::string theCategory = "Muon|RecoMuon|GlobalTrackQualityProducer";
  
  theService->update(iSetup);

  theGlbRefitter->setEvent(iEvent);

  theGlbRefitter->setServices(theService->eventSetup());

  // Take the GLB muon container(s)
  edm::Handle<reco::TrackCollection> glbMuons;
  iEvent.getByLabel(inputCollection_,glbMuons);
  
  edm::Handle<reco::MuonTrackLinksCollection>    linkCollectionHandle;
  iEvent.getByLabel(inputLinksCollection_, linkCollectionHandle);

  // reserve some space
  std::vector<reco::MuonQuality> valuesQual;
  valuesQual.reserve(glbMuons->size());
  
  int trackIndex = 0;
  for (reco::TrackCollection::const_iterator track = glbMuons->begin(); track!=glbMuons->end(); ++track , ++trackIndex) {
    reco::TrackRef glbRef(glbMuons,trackIndex);
    reco::TrackRef staTrack = reco::TrackRef();

    std::vector<Trajectory> refitted=theGlbRefitter->refit(*track,1);

    LogTrace(theCategory)<<"GLBQual N refitted " << refitted.size();
    
    std::pair<double,double> thisKink;
    double relative_muon_chi2 = 0.0;
    double relative_tracker_chi2 = 0.0;
    double glbTrackProbability = 0.0;
    if(refitted.size()>0) {
      thisKink = kink(refitted.front()) ;      
      std::pair<double,double> chi = newChi2(refitted.front());
      relative_muon_chi2 = chi.second; //normalized inside to /sum(muHits.dimension)
      relative_tracker_chi2 = chi.first; //normalized inside to /sum(tkHits.dimension)
      glbTrackProbability = trackProbability(refitted.front());
    }

    LogTrace(theCategory)<<"GLBQual: Kink " << thisKink.first << " " << thisKink.second;
    LogTrace(theCategory)<<"GLBQual: Rel Chi2 " << relative_tracker_chi2 << " " << relative_muon_chi2;
    LogTrace(theCategory)<<"GLBQual: trackProbability " << glbTrackProbability;

    // Fill the STA-TK match information
    float chi2, d, dist, Rpos;
    chi2 = d = dist = Rpos = -1.0;
    bool passTight = false;
    typedef MuonTrajectoryBuilder::TrackCand TrackCand;
    if ( linkCollectionHandle.isValid() ) {
      for ( reco::MuonTrackLinksCollection::const_iterator links = linkCollectionHandle->begin();
            links != linkCollectionHandle->end(); ++links )
        {
          if ( links->trackerTrack().isNull() ||
               links->standAloneTrack().isNull() ||
               links->globalTrack().isNull() ) 
            {
              edm::LogWarning(theCategory) << "Global muon links to constituent tracks are invalid. There should be no such object. Muon is skipped.";
              continue;
            }
          if (links->globalTrack() == glbRef) {
            staTrack = !links->standAloneTrack().isNull() ? links->standAloneTrack() : reco::TrackRef();
            TrackCand staCand = TrackCand((Trajectory*)(0),links->standAloneTrack());
            TrackCand tkCand = TrackCand((Trajectory*)(0),links->trackerTrack());
            chi2 = theGlbMatcher->match(staCand,tkCand,0,0);
            d    = theGlbMatcher->match(staCand,tkCand,1,0);
            Rpos = theGlbMatcher->match(staCand,tkCand,2,0);
            dist = theGlbMatcher->match(staCand,tkCand,3,0);
            passTight = theGlbMatcher->matchTight(staCand,tkCand);
          }
        }
    }

    if(!staTrack.isNull()) LogTrace(theCategory)<<"GLBQual: Used UpdatedAtVtx : " <<  (iEvent.getProvenance(staTrack.id()).productInstanceName() == std::string("UpdatedAtVtx"));

    float maxFloat01 = std::numeric_limits<float>::max()*0.1; // a better solution would be to use float above .. m/be not
    reco::MuonQuality muQual;
    if(!staTrack.isNull()) muQual.updatedSta = iEvent.getProvenance(staTrack.id()).productInstanceName() == std::string("UpdatedAtVtx");
    muQual.trkKink    = thisKink.first > maxFloat01 ? maxFloat01 : thisKink.first;
    muQual.glbKink    = thisKink.second > maxFloat01 ? maxFloat01 : thisKink.second;
    muQual.trkRelChi2 = relative_tracker_chi2 > maxFloat01 ? maxFloat01 : relative_tracker_chi2;
    muQual.staRelChi2 = relative_muon_chi2 > maxFloat01 ? maxFloat01 : relative_muon_chi2;
    muQual.tightMatch = passTight;
    muQual.chi2LocalPosition = dist;
    muQual.chi2LocalMomentum = chi2;
    muQual.localDistance = d;
    muQual.globalDeltaEtaPhi = Rpos;
    muQual.glbTrackProbability = glbTrackProbability;
    valuesQual.push_back(muQual);
  }

  /*
  for(int i = 0; i < valuesTkRelChi2.size(); i++) {
    LogTrace(theCategory)<<"value " << valuesTkRelChi2[i] ;
  }
  */

  // create and fill value maps
  std::auto_ptr<edm::ValueMap<reco::MuonQuality> > outQual(new edm::ValueMap<reco::MuonQuality>());
  edm::ValueMap<reco::MuonQuality>::Filler fillerQual(*outQual);
  fillerQual.insert(glbMuons, valuesQual.begin(), valuesQual.end());
  fillerQual.fill();
  
  // put value map into event
  iEvent.put(outQual);
}

double GlobalTrackQualityProducer::trackProbability ( Trajectory & track ) const [private, virtual]

Definition at line 294 of file GlobalTrackQualityProducer.cc.

References Trajectory::chiSquared(), LnChiSquaredProbability(), and Trajectory::ndof().

Referenced by produce().

                                                                    {

  if ( track.ndof() > 0 && track.chiSquared() > 0 ) { 
    return -LnChiSquaredProbability(track.chiSquared(), track.ndof());
  } else {
    return 0.0;
  }

}