#include <RecoBTau/TrackIPProducer/src/TrackIPProducer.cc>

Inheritance diagram for TrackIPProducer:

Public Member Functions
virtual void	produce (edm::Event &, const edm::EventSetup &)

	TrackIPProducer (const edm::ParameterSet &)

	~TrackIPProducer ()

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

virtual	~EDProducer ()

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

void	registerProducts (ProducerBase , ProductRegistry , ModuleDescription const &)

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

virtual	~ProducerBase ()

Private Member Functions
void	checkEventSetup (const edm::EventSetup &iSetup)

Private Attributes
edm::InputTag	m_associator

unsigned long long	m_calibrationCacheId2D

unsigned long long	m_calibrationCacheId3D

bool	m_computeGhostTrack

bool	m_computeProbabilities

const edm::ParameterSet &	m_config

double	m_cutMaxChiSquared

double	m_cutMaxLIP

double	m_cutMaxTIP

double	m_cutMinPt

int	m_cutPixelHits

int	m_cutTotalHits

bool	m_directionWithGhostTrack

bool	m_directionWithTracks

double	m_ghostTrackPriorDeltaR

edm::InputTag	m_primaryVertexProducer

std::auto_ptr < HistogramProbabilityEstimator >	m_probabilityEstimator

bool	m_useDB

bool	m_useTrackQuality

Additional Inherited Members
Public Types inherited from edm::EDProducer
typedef EDProducer	ModuleType

typedef WorkerT< EDProducer >	WorkerType

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

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::EDProducer
CurrentProcessingContext const *	currentContext () const

Protected Member Functions inherited from edm::ProducerBase
template<class TProducer , class TMethod >
void	callWhenNewProductsRegistered (TProducer *iProd, TMethod iMethod)

Detailed Description

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

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

Definition at line 14 of file TrackIPProducer.h.

Constructor & Destructor Documentation

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

explicit

Definition at line 64 of file TrackIPProducer.cc.

References edm::ParameterSet::getParameter(), m_associator, m_calibrationCacheId2D, m_calibrationCacheId3D, m_computeGhostTrack, m_computeProbabilities, m_config, m_cutMaxChiSquared, m_cutMaxLIP, m_cutMaxTIP, m_cutMinPt, m_cutPixelHits, m_cutTotalHits, m_directionWithGhostTrack, m_directionWithTracks, m_ghostTrackPriorDeltaR, m_primaryVertexProducer, and m_useTrackQuality.

                                                                : 
   m_config(iConfig)
 {
   m_calibrationCacheId3D = 0;
   m_calibrationCacheId2D = 0;
 
   m_associator              = m_config.getParameter<InputTag>("jetTracks");
   m_primaryVertexProducer   = m_config.getParameter<InputTag>("primaryVertex");
   m_computeProbabilities    = m_config.getParameter<bool>("computeProbabilities");
   m_computeGhostTrack       = m_config.getParameter<bool>("computeGhostTrack");
   m_ghostTrackPriorDeltaR   = m_config.getParameter<double>("ghostTrackPriorDeltaR");
   m_cutPixelHits            = m_config.getParameter<int>("minimumNumberOfPixelHits");
   m_cutTotalHits            = m_config.getParameter<int>("minimumNumberOfHits");
   m_cutMaxTIP               = m_config.getParameter<double>("maximumTransverseImpactParameter");
   m_cutMinPt                = m_config.getParameter<double>("minimumTransverseMomentum");
   m_cutMaxChiSquared        = m_config.getParameter<double>("maximumChiSquared");
   m_cutMaxLIP               = m_config.getParameter<double>("maximumLongitudinalImpactParameter");
   m_directionWithTracks     = m_config.getParameter<bool>("jetDirectionUsingTracks");
   m_directionWithGhostTrack = m_config.getParameter<bool>("jetDirectionUsingGhostTrack");
   m_useTrackQuality         = m_config.getParameter<bool>("useTrackQuality");
 
   if (m_computeGhostTrack)
     produces<reco::TrackCollection>("ghostTracks");
   produces<reco::TrackIPTagInfoCollection>();
 }

TrackIPProducer::~TrackIPProducer ( )

Definition at line 90 of file TrackIPProducer.cc.

91 {

92 }

Member Function Documentation

void TrackIPProducer::checkEventSetup ( const edm::EventSetup & iSetup )

private

Definition at line 307 of file TrackIPProducer.cc.

References edm::eventsetup::EventSetupRecord::cacheIdentifier(), edm::EventSetup::get(), m_calibrationCacheId2D, m_calibrationCacheId3D, m_probabilityEstimator, and edm::ESHandle< class >::product().

Referenced by produce().

  {
   using namespace edm;
   using namespace edm::eventsetup;
 
    const EventSetupRecord & re2D= iSetup.get<BTagTrackProbability2DRcd>();
    const EventSetupRecord & re3D= iSetup.get<BTagTrackProbability3DRcd>();
    unsigned long long cacheId2D= re2D.cacheIdentifier();
    unsigned long long cacheId3D= re3D.cacheIdentifier();
 
    if(cacheId2D!=m_calibrationCacheId2D || cacheId3D!=m_calibrationCacheId3D  )  //Calibration changed
    {
      //iSetup.get<BTagTrackProbabilityRcd>().get(calib);
      ESHandle<TrackProbabilityCalibration> calib2DHandle;
      iSetup.get<BTagTrackProbability2DRcd>().get(calib2DHandle);
      ESHandle<TrackProbabilityCalibration> calib3DHandle;
      iSetup.get<BTagTrackProbability3DRcd>().get(calib3DHandle);
 
      const TrackProbabilityCalibration *  ca2D= calib2DHandle.product();
      const TrackProbabilityCalibration *  ca3D= calib3DHandle.product();
 
      m_probabilityEstimator.reset(new HistogramProbabilityEstimator(ca3D,ca2D));
 
    }
    m_calibrationCacheId3D=cacheId3D;
    m_calibrationCacheId2D=cacheId2D;
 }

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

virtual

Implements edm::EDProducer.

Definition at line 99 of file TrackIPProducer.cc.

References abs, edm::RefVector< C, T, F >::begin(), checkEventSetup(), IPTools::closestApproachToJet(), reco::TrackIPTagInfo::TrackIPData::closestToGhostTrack, reco::TrackIPTagInfo::TrackIPData::closestToJetAxis, RecoVertex::convertError(), RecoVertex::convertPos(), reco::GhostTrackPrediction::direction(), VertexDistance3D::distance(), reco::TrackIPTagInfo::TrackIPData::distanceToGhostTrack, reco::TrackIPTagInfo::TrackIPData::distanceToJetAxis, reco::TrackBase::dxy(), reco::TrackBase::dz(), alignCSCRings::e, edm::RefVector< C, T, F >::end(), error, reco::Vertex::error(), reco::TransientTrack::field(), reco::GhostTrackFitter::fit(), edm::EventSetup::get(), edm::Event::getByLabel(), edm::Event::getRefBeforePut(), ghostTrackES_cfi::ghostTrack, reco::TrackIPTagInfo::TrackIPData::ghostTrackWeight, TrajectoryStateOnSurface::globalPosition(), reco::TrackBase::hitPattern(), i, reco::TransientTrack::impactPointState(), reco::TrackIPTagInfo::TrackIPData::ip2d, reco::TrackIPTagInfo::TrackIPData::ip3d, TrajectoryStateOnSurface::isValid(), IPTools::jetTrackDistance(), reco::GhostTrackPrediction::lambda(), m_associator, m_computeGhostTrack, m_computeProbabilities, m_cutMaxChiSquared, m_cutMaxLIP, m_cutMaxTIP, m_cutMinPt, m_cutPixelHits, m_cutTotalHits, m_directionWithGhostTrack, m_directionWithTracks, m_ghostTrackPriorDeltaR, m_primaryVertexProducer, m_probabilityEstimator, m_useTrackQuality, reco::TrackBase::normalizedChi2(), reco::HitPattern::numberOfValidHits(), reco::HitPattern::numberOfValidPixelHits(), AlCaHLTBitMon_ParallelJobs::p, p1, p2, pos, reco::GhostTrackPrediction::position(), reco::Vertex::position(), reco::GhostTrackPrediction::positionError(), reco::GhostTrackPrediction::prediction(), reco::TrackBase::pt(), edm::RefVector< C, T, F >::push_back(), edm::Event::put(), query::result, IPTools::signedImpactParameter3D(), IPTools::signedTransverseImpactParameter(), and testEve_cfg::tracks.

 {
    // Update probability estimator if event setup is changed
    if (m_computeProbabilities)
      checkEventSetup(iSetup);
  
    //input objects 
    Handle<reco::JetTracksAssociationCollection> jetTracksAssociation;
    iEvent.getByLabel(m_associator, jetTracksAssociation);
    
    Handle<reco::VertexCollection> primaryVertex;
    iEvent.getByLabel(m_primaryVertexProducer, primaryVertex);
 
    edm::ESHandle<TransientTrackBuilder> builder;
    iSetup.get<TransientTrackRecord>().get("TransientTrackBuilder", builder);
    // m_algo.setTransientTrackBuilder(builder.product());
 
    // output collections 
    auto_ptr<reco::TrackIPTagInfoCollection> result(new reco::TrackIPTagInfoCollection);
 
    auto_ptr<reco::TrackCollection> ghostTracks;
    TrackRefProd ghostTrackRefProd;
    if (m_computeGhostTrack) {
      ghostTracks.reset(new reco::TrackCollection);
      ghostTrackRefProd = iEvent.getRefBeforePut<TrackCollection>("ghostTracks");
    }
 
    // use first pv of the collection
    Vertex dummy;
    const Vertex *pv = &dummy;
    edm::Ref<VertexCollection> pvRef;
    if (primaryVertex->size() != 0) {
      pv = &*primaryVertex->begin();
      // we always use the first vertex (at the moment)
      pvRef = edm::Ref<VertexCollection>(primaryVertex, 0);
    } else { // create a dummy PV
      Vertex::Error e;
      e(0, 0) = 0.0015 * 0.0015;
      e(1, 1) = 0.0015 * 0.0015;
      e(2, 2) = 15. * 15.;
      Vertex::Point p(0, 0, 0);
      dummy = Vertex(p, e, 0, 0, 0);
    }
 
    int i = 0;
    for(JetTracksAssociationCollection::const_iterator it =
                         jetTracksAssociation->begin();
        it != jetTracksAssociation->end(); it++, i++) {
      TrackRefVector tracks = it->second;
      math::XYZVector jetMomentum = it->first->momentum();
 
      if (m_directionWithTracks) {
        jetMomentum *= 0.5;
        for(TrackRefVector::const_iterator itTrack = tracks.begin();
            itTrack != tracks.end(); ++itTrack)
          if ((**itTrack).numberOfValidHits() >= m_cutTotalHits)
            //minimal quality cuts
            jetMomentum += (*itTrack)->momentum();
      }
 
      TrackRefVector selectedTracks;
      vector<TransientTrack> transientTracks;
 
      for(TrackRefVector::const_iterator itTrack = tracks.begin();
          itTrack != tracks.end(); ++itTrack) {
        const Track & track = **itTrack;
        TransientTrack transientTrack = builder->build(*itTrack);
 /*     cout << " pt " <<  track.pt() <<
                " d0 " <<  fabs(track.d0()) <<
                " #hit " <<    track.hitPattern().numberOfValidHits()<<
                " ipZ " <<   fabs(track.dz()-pvZ)<<
                " chi2 " <<  track.normalizedChi2()<<
                " #pixel " <<    track.hitPattern().numberOfValidPixelHits()<< endl;
 */
        if (track.pt() > m_cutMinPt &&
            track.hitPattern().numberOfValidHits() >= m_cutTotalHits &&         // min num tracker hits
            track.hitPattern().numberOfValidPixelHits() >= m_cutPixelHits &&
            track.normalizedChi2() < m_cutMaxChiSquared &&
            std::abs(track.dxy(pv->position())) < m_cutMaxTIP &&
            std::abs(track.dz(pv->position())) < m_cutMaxLIP) {
          selectedTracks.push_back(*itTrack);
          transientTracks.push_back(transientTrack);
        }
      }
 
      GlobalVector direction(jetMomentum.x(), jetMomentum.y(), jetMomentum.z());
 
      auto_ptr<GhostTrack> ghostTrack;
      TrackRef ghostTrackRef;
      if (m_computeGhostTrack) {
        GhostTrackFitter fitter;
        GlobalPoint origin = RecoVertex::convertPos(pv->position());
        GlobalError error = RecoVertex::convertError(pv->error());
        ghostTrack.reset(new GhostTrack(fitter.fit(origin, error, direction,
                                                   m_ghostTrackPriorDeltaR,
                                                   transientTracks)));
 
 /*
     if (std::sqrt(jetMomentum.Perp2()) > 30) {
         double offset = ghostTrack->prediction().lambda(origin);
         std::cout << "------------------ jet pt " << std::sqrt(jetMomentum.Perp2()) << std::endl;
         const std::vector<GhostTrackState> *states = &ghostTrack->states();
         for(std::vector<GhostTrackState>::const_iterator state = states->begin();
             state != states->end(); ++state) {
             double dist = state->lambda() - offset;
             double err = state->lambdaError(ghostTrack->prediction(), error);
             double ipSig = IPTools::signedImpactParameter3D(state->track(), direction, *pv).second.significance();
             double axisDist = state->axisDistance(ghostTrack->prediction());
             std::cout << state->track().impactPointState().freeState()->momentum().perp()
                       << ": " << dist << "/" << err << " [" << (dist / err) << "], ipsig = " << ipSig << ", dist = " << axisDist << ", w = " << state->weight() << std::endl;
         }
     }
 */
        ghostTrackRef = TrackRef(ghostTrackRefProd, ghostTracks->size());
        ghostTracks->push_back(*ghostTrack);
 
        if (m_directionWithGhostTrack) { 
          const GhostTrackPrediction &pred = ghostTrack->prediction();
          double lambda = pred.lambda(origin);
          dummy = Vertex(RecoVertex::convertPos(pred.position(lambda)),
                         RecoVertex::convertError(pred.positionError(lambda)),
                         0, 0, 0);
          pv = &dummy;
          direction = pred.direction();
        }
      }
 
      vector<float> prob2D, prob3D;
      vector<TrackIPTagInfo::TrackIPData> ipData;
 
      for(unsigned int ind = 0; ind < transientTracks.size(); ind++) {
        const Track & track = *selectedTracks[ind];
        const TransientTrack &transientTrack = transientTracks[ind];
 
        TrackIPTagInfo::TrackIPData trackIP;
        trackIP.ip3d = IPTools::signedImpactParameter3D(transientTrack, direction, *pv).second;
        trackIP.ip2d = IPTools::signedTransverseImpactParameter(transientTrack, direction, *pv).second;
 
        TrajectoryStateOnSurface closest =
                IPTools::closestApproachToJet(transientTrack.impactPointState(),
                                              *pv, direction,
                                              transientTrack.field());
        if (closest.isValid())
          trackIP.closestToJetAxis = closest.globalPosition();
 
        // TODO: cross check if it is the same using other methods
        trackIP.distanceToJetAxis = IPTools::jetTrackDistance(transientTrack, direction, *pv).second;
 
        if (ghostTrack.get()) {
          const std::vector<GhostTrackState> &states = ghostTrack->states();
          std::vector<GhostTrackState>::const_iterator pos =
                 std::find_if(states.begin(), states.end(),
                              bind(equal_to<TransientTrack>(),
                                   bind(&GhostTrackState::track, _1),
                                   transientTrack));
 
          if (pos != states.end() && pos->isValid()) {
            VertexDistance3D dist;
            const GhostTrackPrediction &pred = ghostTrack->prediction();
            GlobalPoint p1 = pos->tsos().globalPosition();
            GlobalError e1 = pos->tsos().cartesianError().position();
            GlobalPoint p2 = pred.position(pos->lambda());
            GlobalError e2 = pred.positionError(pos->lambda());
            trackIP.closestToGhostTrack = p1;
            trackIP.distanceToGhostTrack = dist.distance(VertexState(p1, e1),
                                                         VertexState(p2, e2));
            trackIP.ghostTrackWeight = pos->weight();
          } else {
            trackIP.distanceToGhostTrack = Measurement1D(-1. -1.);
            trackIP.ghostTrackWeight = 0.;
          }
        } else {
          trackIP.distanceToGhostTrack = Measurement1D(-1. -1.);
          trackIP.ghostTrackWeight = 1.;
        }
 
        ipData.push_back(trackIP);
 
        if (m_computeProbabilities) {
          //probability with 3D ip
          pair<bool,double> probability = m_probabilityEstimator->probability(m_useTrackQuality, 0,ipData.back().ip3d.significance(),track,*(it->first),*pv);
          prob3D.push_back(probability.first ? probability.second : -1.);
 
          //probability with 2D ip
          probability = m_probabilityEstimator->probability(m_useTrackQuality,1,ipData.back().ip2d.significance(),track,*(it->first),*pv);
          prob2D.push_back(probability.first ? probability.second : -1.);
        } 
      }
 
      Ref<JetTracksAssociationCollection> jtaRef(jetTracksAssociation, i);
      result->push_back(
              TrackIPTagInfo(ipData, prob2D, prob3D, selectedTracks,
                             jtaRef, pvRef, direction, ghostTrackRef));
    }
  
    if (m_computeGhostTrack)
      iEvent.put(ghostTracks, "ghostTracks");
    iEvent.put(result);
 }