ElectronSeedAnalyzer Class Reference

#include <ElectronSeedAnalyzer.h>

Inheritance diagram for ElectronSeedAnalyzer:

Public Member Functions
virtual void	analyze (const edm::Event &, const edm::EventSetup &)
virtual void	beginJob ()
	ElectronSeedAnalyzer (const edm::ParameterSet &conf)
virtual void	endJob ()
virtual	~ElectronSeedAnalyzer ()
Public Member Functions inherited from edm::EDAnalyzer
	EDAnalyzer ()
std::string	workerType () const
virtual	~EDAnalyzer ()
Public Member Functions inherited from edm::EDConsumerBase
	EDConsumerBase ()
ProductHolderIndex	indexFrom (EDGetToken, BranchType, TypeID const &) const
void	itemsMayGet (BranchType, std::vector< ProductHolderIndex > &) const
void	itemsToGet (BranchType, std::vector< ProductHolderIndex > &) const
void	labelsForToken (EDGetToken iToken, Labels &oLabels) const
void	updateLookup (BranchType iBranchType, ProductHolderIndexHelper const &)
virtual	~EDConsumerBase ()

Private Attributes
edm::InputTag	beamSpot_
TH1F *	histecaldriveneMCmatched_
TH1F *	histecaldrivenetaMCmatched_
TH1F *	histecaldrivenptMCmatched_
TH1F *	histeclu_
TH1F *	histeffeta_
TH1F *	histeffpt_
TH1F *	histeMC_
TH1F *	histeMCmatched_
TH1F *	histeoverp_
TH1F *	histeta_
TH1F *	histetaclu_
TH1F *	histetaMC_
TH1F *	histetaMCmatched_
TH1F *	histetclu_
TFile *	histfile_
TH1I *	histnbclus_
TH1I *	histnbseeds_
TH1I *	histnrseeds_
TH1F *	histp_
TH1F *	histpt_
TH1F *	histptMC_
TH1F *	histptMCmatched_
TH1F *	histq_
TH1F *	histtrackerdriveneMCmatched_
TH1F *	histtrackerdrivenetaMCmatched_
TH1F *	histtrackerdrivenptMCmatched_
edm::InputTag	inputCollection_
float	mcEnergy [10]
float	mcEta [10]
float	mcPhi [10]
float	mcPt [10]
float	mcQ [10]
float	seedDphi1 [10]
float	seedDphi2 [10]
float	seedDrz1 [10]
float	seedDrz2 [10]
float	seedEta [10]
int	seedLayer1 [10]
int	seedLayer2 [10]
float	seedMomentum [10]
float	seedPhi [10]
float	seedPhi1 [10]
float	seedPhi2 [10]
float	seedPt [10]
float	seedQ [10]
float	seedRz1 [10]
float	seedRz2 [10]
int	seedSide1 [10]
int	seedSide2 [10]
int	seedSubdet1 [10]
int	seedSubdet2 [10]
float	superclusterEnergy [10]
float	superclusterEt [10]
float	superclusterEta [10]
float	superclusterPhi [10]
TrajectoryStateTransform	transformer_
TTree *	tree_

Additional Inherited Members
Public Types inherited from edm::EDAnalyzer
typedef EDAnalyzer	ModuleType
typedef WorkerT< EDAnalyzer >	WorkerType
Static Public Member Functions inherited from edm::EDAnalyzer
static const std::string &	baseType ()
static void	fillDescriptions (ConfigurationDescriptions &descriptions)
static void	prevalidate (ConfigurationDescriptions &)
Protected Member Functions inherited from edm::EDAnalyzer
void	callWhenNewProductsRegistered (std::function< void(BranchDescription const &)> const &func)
CurrentProcessingContext const *	currentContext () const
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

Definition at line 35 of file ElectronSeedAnalyzer.h.

Constructor & Destructor Documentation

ElectronSeedAnalyzer::ElectronSeedAnalyzer ( const edm::ParameterSet &  conf )

explicit

Definition at line 58 of file ElectronSeedAnalyzer.cc.

References edm::ParameterSet::getParameter(), histfile_, and inputCollection_.

                                                                      :
  beamSpot_(conf.getParameter<edm::InputTag>("beamSpot"))
{
  inputCollection_=conf.getParameter<edm::InputTag>("inputCollection") ;
  histfile_ = new TFile("electronpixelseeds.root","RECREATE");
}

ElectronSeedAnalyzer::~ElectronSeedAnalyzer ( )

virtual

Definition at line 173 of file ElectronSeedAnalyzer.cc.

References histeMC_, and histfile_.

{
  // do anything here that needs to be done at desctruction time
  // (e.g. close files, deallocate resources etc.)
  //tree_->Print();
  histfile_->Write();
  histeMC_->Write();
  histfile_->Close();
}

Member Function Documentation

void ElectronSeedAnalyzer::analyze ( const edm::Event &  e, const edm::EventSetup &  iSetup  )

virtual

Implements edm::EDAnalyzer.

Definition at line 183 of file ElectronSeedAnalyzer.cc.

References abs, alongMomentum, beamSpot_, edm::RefToBase< T >::castTo(), DeDxDiscriminatorTools::charge(), deltaR(), DetId::det(), relval_parameters_module::energy, PV3DBase< T, PVType, FrameType >::eta(), eta(), create_public_lumi_plots::exp, configurableAnalysis::GenParticle, edm::EventSetup::get(), edm::Event::getByLabel(), TrajectoryStateOnSurface::globalMomentum(), TrajectoryStateOnSurface::globalPosition(), histecaldriveneMCmatched_, histecaldrivenetaMCmatched_, histecaldrivenptMCmatched_, histeMC_, histeMCmatched_, histeoverp_, histeta_, histetaclu_, histetaMC_, histetaMCmatched_, histetclu_, histnbclus_, histnbseeds_, histnrseeds_, histpt_, histptMC_, histptMCmatched_, histq_, histtrackerdriveneMCmatched_, histtrackerdrivenetaMCmatched_, histtrackerdrivenptMCmatched_, edm::EventBase::id(), inputCollection_, edm::RefToBase< T >::isNull(), TrajectoryStateOnSurface::isValid(), LogDebug, PV3DBase< T, PVType, FrameType >::mag(), mcEnergy, mcEta, mcPhi, mcPt, mcQ, FreeTrajectoryState::momentum(), oppositeToMomentum, AlCaHLTBitMon_ParallelJobs::p, parents, PV3DBase< T, PVType, FrameType >::perp(), phi, PV3DBase< T, PVType, FrameType >::phi(), pi, FreeTrajectoryState::position(), funct::pow(), edm::Handle< T >::product(), alignCSCRings::r, seedDphi1, seedDphi2, seedDrz1, seedDrz2, seedEta, seedLayer1, seedLayer2, seedMomentum, seedPhi, seedPhi1, seedPhi2, seedPt, seedQ, seedRz1, seedRz2, seedSide1, seedSide2, seedSubdet1, seedSubdet2, funct::sin(), mathSSE::sqrt(), DetId::subdetId(), superclusterEnergy, superclusterEt, superclusterEta, superclusterPhi, GeomDet::surface(), lumiQTWidget::t, GeomDet::toGlobal(), Surface::toGlobal(), trajectoryStateTransform::transientState(), PV3DBase< T, PVType, FrameType >::x(), PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().

{
  //Retrieve tracker topology from geometry
  edm::ESHandle<TrackerTopology> tTopo;
  iSetup.get<IdealGeometryRecord>().get(tTopo);



  edm::ESHandle<TrackerGeometry> pDD ;
  edm::ESHandle<MagneticField> theMagField ;
  iSetup.get<TrackerDigiGeometryRecord> ().get(pDD);
  iSetup.get<IdealMagneticFieldRecord>().get(theMagField);

  // rereads the seeds for test purposes
  typedef edm::OwnVector<TrackingRecHit> recHitContainer;
  typedef recHitContainer::const_iterator const_iterator;
  typedef std::pair<const_iterator,const_iterator> range;


  // get beam spot
  edm::Handle<reco::BeamSpot> theBeamSpot;
  e.getByLabel(beamSpot_, theBeamSpot);

  // get seeds

  edm::Handle<ElectronSeedCollection> elSeeds;
  e.getByLabel(inputCollection_,elSeeds);
  edm::LogInfo("")<<"\n\n =================> Treating event "<<e.id()<<" Number of seeds "<<elSeeds.product()->size();
  int is=0;

  FTSFromVertexToPointFactory   myFTS;
  float mass=.000511; // electron propagation
  PropagatorWithMaterial* prop1stLayer = new PropagatorWithMaterial(oppositeToMomentum,mass,&(*theMagField));
  PropagatorWithMaterial* prop2ndLayer = new PropagatorWithMaterial(alongMomentum,mass,&(*theMagField));

  float dphi1=0., dphi2=0., drz1=0., drz2=0.;
  float phi1=0., phi2=0., rz1=0., rz2=0.;

  for( ElectronSeedCollection::const_iterator MyS= (*elSeeds).begin(); MyS != (*elSeeds).end(); ++MyS) {

    LogDebug("") <<"\nSeed nr "<<is<<": ";
    range r=(*MyS).recHits();
     LogDebug("")<<" Number of RecHits= "<<(*MyS).nHits();
    const GeomDet *det1=0;const GeomDet *det2=0;

    TrajectorySeed::const_iterator it=r.first;
    DetId id1 = (*it).geographicalId();
    det1 = pDD->idToDet(id1);
    LogDebug("") <<" First hit local x,y,z "<<(*it).localPosition()<<" det "<<id1.det()<<" subdet "<<id1.subdetId();
    LogDebug("") <<" First hit global  "<<det1->toGlobal((*it).localPosition());
    //std::cout <<" First hit local x,y,z "<<(*it).localPosition()<<" det "<<id1.det()<<" subdet "<<id1.subdetId()<< std::endl;
    //std::cout <<" First hit global  "<<det1->toGlobal((*it).localPosition())<< std::endl;
    it++;
    DetId id2 = (*it).geographicalId();
    det2 = pDD->idToDet(id2);
    LogDebug("") <<" Second hit local x,y,z "<<(*it).localPosition()<<" det "<<id2.det()<<" subdet "<<id2.subdetId();
    LogDebug("") <<" Second hit global  "<<det2->toGlobal((*it).localPosition());
    //std::cout <<" Second hit local x,y,z "<<(*it).localPosition()<<" det "<<id2.det()<<" subdet "<<id2.subdetId()<< std::endl;
    //std::cout <<" Second hit global  "<<det2->toGlobal((*it).localPosition()) << std::endl;

    // state on last det
    const GeomDet *det=0;
    for (TrackingRecHitCollection::const_iterator rhits=r.first; rhits!=r.second; rhits++) det = pDD->idToDet(((*rhits)).geographicalId());
    TrajectoryStateOnSurface t=  trajectoryStateTransform::transientState((*MyS).startingState(), &(det->surface()), &(*theMagField));

    // debug

    LogDebug("")<<" ElectronSeed outermost state position: "<<t.globalPosition();
    LogDebug("")<<" ElectronSeed outermost state momentum: "<<t.globalMomentum();
    edm::RefToBase<CaloCluster> caloCluster = (*MyS).caloCluster() ;
    if (caloCluster.isNull()) continue;
    edm::Ref<SuperClusterCollection> theClus = caloCluster.castTo<SuperClusterRef>() ;
    LogDebug("")<<" ElectronSeed superCluster energy: "<<theClus->energy()<<", position: "<<theClus->position();
    LogDebug("")<<" ElectronSeed outermost state Pt: "<<t.globalMomentum().perp();
    LogDebug("")<<" ElectronSeed supercluster Et: "<<theClus->energy()*sin(2.*atan(exp(-theClus->position().eta())));
    LogDebug("")<<" ElectronSeed outermost momentum direction eta: "<<t.globalMomentum().eta();
    LogDebug("")<<" ElectronSeed supercluster eta: "<<theClus->position().eta();
    LogDebug("")<<" ElectronSeed seed charge: "<<(*MyS).getCharge();
    LogDebug("")<<" ElectronSeed E/p: "<<theClus->energy()/t.globalMomentum().mag();

    // retreive SC and compute distances between hit position and prediction the same
    // way as in the PixelHitMatcher
    
    // inputs are charge, cluster position, vertex position, cluster energy and B field
    int charge = int((*MyS).getCharge());
    GlobalPoint xmeas(theClus->position().x(),theClus->position().y(),theClus->position().z());
    GlobalPoint vprim(theBeamSpot->position().x(),theBeamSpot->position().y(),theBeamSpot->position().z());
    float energy = theClus->energy();

    FreeTrajectoryState fts = myFTS(&(*theMagField),xmeas, vprim,
                 energy, charge);
    //std::cout << "[PixelHitMatcher::compatibleSeeds] fts position, momentum " <<
    // fts.parameters().position() << " " << fts.parameters().momentum() << std::endl;

    PerpendicularBoundPlaneBuilder bpb;
    TrajectoryStateOnSurface tsos(fts, *bpb(fts.position(), fts.momentum()));

    //      TrajectorySeed::range r=(*seeds.product())[i].recHits();
   // TrajectorySeed::range r=(*seeds)[i].recHits();

    // first Hit
    it=r.first;
    DetId id=(*it).geographicalId();
    const GeomDet *geomdet=pDD->idToDet((*it).geographicalId());
    LocalPoint lp=(*it).localPosition();
    GlobalPoint hitPos=geomdet->surface().toGlobal(lp);

    TrajectoryStateOnSurface tsos1;
    tsos1 = prop1stLayer->propagate(tsos,geomdet->surface()) ;

    if (tsos1.isValid()) {

      std::pair<bool,double> est;

      //UB add test on phidiff
      float SCl_phi = xmeas.phi();
      float localDphi = SCl_phi-hitPos.phi();
      if(localDphi>CLHEP::pi)localDphi-=(2*CLHEP::pi);
      if(localDphi<-CLHEP::pi)localDphi+=(2*CLHEP::pi);
      if(std::abs(localDphi)>2.5)continue;

      phi1 = hitPos.phi();
      dphi1 = hitPos.phi() - tsos1.globalPosition().phi();
      rz1 = hitPos.perp();
      drz1 = hitPos.perp() - tsos1.globalPosition().perp();
      if (id.subdetId()%2==1) {
    drz1 = hitPos.z() - tsos1.globalPosition().z();
    rz1 = hitPos.z();
      }

      // now second Hit
      it++;
      DetId id2=(*it).geographicalId();
      const GeomDet *geomdet2=pDD->idToDet((*it).geographicalId());
      TrajectoryStateOnSurface tsos2;

      // compute the z vertex from the cluster point and the found pixel hit
      double pxHit1z = hitPos.z();
      double pxHit1x = hitPos.x();
      double pxHit1y = hitPos.y();
      double r1diff = (pxHit1x-vprim.x())*(pxHit1x-vprim.x()) + (pxHit1y-vprim.y())*(pxHit1y-vprim.y());
      r1diff=sqrt(r1diff);
      double r2diff = (xmeas.x()-pxHit1x)*(xmeas.x()-pxHit1x) + (xmeas.y()-pxHit1y)*(xmeas.y()-pxHit1y);
      r2diff=sqrt(r2diff);
      double zVertexPred = pxHit1z - r1diff*(xmeas.z()-pxHit1z)/r2diff;

      GlobalPoint vertexPred(vprim.x(),vprim.y(),zVertexPred);

      FreeTrajectoryState fts2 = myFTS(&(*theMagField),hitPos,vertexPred,energy, charge);
      tsos2 = prop2ndLayer->propagate(fts2,geomdet2->surface()) ;

      if (tsos2.isValid()) {
    LocalPoint lp2=(*it).localPosition();
    GlobalPoint hitPos2=geomdet2->surface().toGlobal(lp2);
    phi2 = hitPos2.phi();
    dphi2 = hitPos2.phi() - tsos2.globalPosition().phi();
    rz2 = hitPos2.perp();
    drz2 = hitPos2.perp() - tsos2.globalPosition().perp();
        if (id2.subdetId()%2==1) {
      rz2 = hitPos2.z();
      drz2 = hitPos2.z() - tsos2.globalPosition().z();
    }
      }

    }

    // fill the tree and histos

    histpt_->Fill(t.globalMomentum().perp());
    histetclu_->Fill(theClus->energy()*sin(2.*atan(exp(-theClus->position().eta()))));
    histeta_->Fill(t.globalMomentum().eta());
    histetaclu_->Fill(theClus->position().eta());
    histq_->Fill((*MyS).getCharge());
    histeoverp_->Fill(theClus->energy()/t.globalMomentum().mag());

    if (is<10) {
      superclusterEnergy[is] = theClus->energy();
      superclusterEta[is] = theClus->position().eta();
      superclusterPhi[is] = theClus->position().phi();
      superclusterEt[is] = theClus->energy()*sin(2.*atan(exp(-theClus->position().eta())));
      seedMomentum[is] = t.globalMomentum().mag();
      seedEta[is] = t.globalMomentum().eta();
      seedPhi[is] = t.globalMomentum().phi();
      seedPt[is] = t.globalMomentum().perp();
      seedQ[is] = (*MyS).getCharge();
      seedSubdet1[is] = id1.subdetId();
      switch (seedSubdet1[is]) {
        case 1:
      {
      
      seedLayer1[is] = tTopo->pxbLayer( id1);
      seedSide1[is] = 0;
      break;
      }
        case 2:
    {
      
      seedLayer1[is] = tTopo->pxfDisk( id1);
      seedSide1[is] = tTopo->pxfSide( id1);
      break;
      }
        case 3:
      {
      
      seedLayer1[is] = tTopo->tibLayer( id1);
      seedSide1[is] = 0;
      break;
      }
        case 4:
      {
      
      seedLayer1[is] = tTopo->tidWheel( id1);
      seedSide1[is] = tTopo->tidSide( id1);
      break;
      }
        case 5:
      {
      
      seedLayer1[is] = tTopo->tobLayer( id1);
      seedSide1[is] = 0;
      break;
      }
        case 6:
      {
      
      seedLayer1[is] = tTopo->tecWheel( id1);
      seedSide1[is] = tTopo->tecSide( id1);
      break;
      }
      }
      seedPhi1[is] = phi1;
      seedRz1[is] = rz1;
      seedDphi1[is] = dphi1;
      seedDrz1[is] = drz1;
      seedSubdet2[is] = id2.subdetId();
      switch (seedSubdet2[is]) {
        case 1:
      {
      
      seedLayer2[is] = tTopo->pxbLayer( id2);
      seedSide2[is] = 0;
      break;
      }
        case 2:
      {
      
      seedLayer2[is] = tTopo->pxfDisk( id2);
      seedSide2[is] = tTopo->pxfSide( id2);
      break;
      }
        case 3:
      {
      
      seedLayer2[is] = tTopo->tibLayer( id2);
      seedSide2[is] = 0;
      break;
      }
        case 4:
      {
      
      seedLayer2[is] = tTopo->tidWheel( id2);
      seedSide2[is] = tTopo->tidSide( id2);
      break;
      }
        case 5:
      {
      
      seedLayer2[is] = tTopo->tobLayer( id2);
      seedSide2[is] = 0;
      break;
      }
        case 6:
      {
      
      seedLayer2[is] = tTopo->tecWheel( id2);
      seedSide2[is] = tTopo->tecSide( id2);
      break;
      }
      }
      seedDphi2[is] = dphi2;
      seedDrz2[is] = drz2;
      seedPhi2[is] = phi2;
      seedRz2[is] = rz2;
    }

    is++;

  }

  histnbseeds_->Fill(elSeeds.product()->size());

  // get input clusters

  edm::Handle<SuperClusterCollection> clusters;
  //CC to be changed according to supercluster input
  e.getByLabel("correctedHybridSuperClusters", clusters);
  histnbclus_->Fill(clusters.product()->size());
  if (clusters.product()->size()>0) histnrseeds_->Fill(elSeeds.product()->size());
  // get MC information

  edm::Handle<edm::HepMCProduct> HepMCEvt;
  // this one is empty branch in current test files
  //e.getByLabel("VtxSmeared", "", HepMCEvt);
  //e.getByLabel("source", "", HepMCEvt);
  e.getByLabel("generator", "", HepMCEvt);

  const HepMC::GenEvent* MCEvt = HepMCEvt->GetEvent();
  HepMC::GenParticle* genPc=0;
  HepMC::FourVector pAssSim;
  int ip=0;
  for (HepMC::GenEvent::particle_const_iterator partIter = MCEvt->particles_begin();
   partIter != MCEvt->particles_end(); ++partIter) {

    for (HepMC::GenEvent::vertex_const_iterator vertIter = MCEvt->vertices_begin();
     vertIter != MCEvt->vertices_end(); ++vertIter) {

      //      CLHEP::HepLorentzVector creation = (*partIter)->CreationVertex();
      HepMC::GenVertex * creation = (*partIter)->production_vertex();
      //      CLHEP::HepLorentzVector momentum = (*partIter)->Momentum();
      HepMC::FourVector momentum = (*partIter)->momentum();
      //      HepPDT::ParticleID id = (*partIter)->particleID();  // electrons and positrons are 11 and -11
       int id = (*partIter)->pdg_id();  // electrons and positrons are 11 and -11
     LogDebug("")  << "MC particle id " << id << ", creationVertex " << (*creation) << " cm, initialMomentum " << momentum.rho() << " GeV/c" << std::endl;

      if (id == 11 || id == -11) {

      // single primary electrons or electrons from Zs or Ws
      HepMC::GenParticle* mother = 0;
      if ( (*partIter)->production_vertex() )  {
       if ( (*partIter)->production_vertex()->particles_begin(HepMC::parents) !=
           (*partIter)->production_vertex()->particles_end(HepMC::parents))
            mother = *((*partIter)->production_vertex()->particles_begin(HepMC::parents));
      }
      if ( ((mother == 0) || ((mother != 0) && (mother->pdg_id() == 23))
                      || ((mother != 0) && (mother->pdg_id() == 32))
                      || ((mother != 0) && (std::abs(mother->pdg_id()) == 24)))) {
      genPc=(*partIter);
      pAssSim = genPc->momentum();

      // EWK fiducial
      //if (pAssSim.perp()> 100. || std::abs(pAssSim.eta())> 2.5) continue;     
      //if (pAssSim.perp()< 20. || (std::abs(pAssSim.eta())> 1.4442 && std::abs(pAssSim.eta())< 1.56) || std::abs(pAssSim.eta())> 2.5) continue;
      // reconstruction fiducial
      //if (pAssSim.perp()< 5. || std::abs(pAssSim.eta())> 2.5) continue;
      if (std::abs(pAssSim.eta())> 2.5) continue;

      histptMC_->Fill(pAssSim.perp());
      histetaMC_->Fill(pAssSim.eta());
      histeMC_->Fill(pAssSim.rho());

     // looking for the best matching gsf electron
      bool okSeedFound = false;
      double seedOkRatio = 999999.;

      // find best matched seed
      reco::ElectronSeed bestElectronSeed;
      for( ElectronSeedCollection::const_iterator gsfIter= (*elSeeds).begin(); gsfIter != (*elSeeds).end(); ++gsfIter) {

        range r=gsfIter->recHits();
        const GeomDet *det=0;
        for (TrackingRecHitCollection::const_iterator rhits=r.first; rhits!=r.second; rhits++) det = pDD->idToDet(((*rhits)).geographicalId());
         TrajectoryStateOnSurface t= trajectoryStateTransform::transientState(gsfIter->startingState(), &(det->surface()), &(*theMagField));

    float eta = t.globalMomentum().eta();
    float phi = t.globalMomentum().phi();
    float p = t.globalMomentum().mag();
        double dphi = phi-pAssSim.phi();
        if (std::abs(dphi)>CLHEP::pi)
         dphi = dphi < 0? (CLHEP::twopi) + dphi : dphi - CLHEP::twopi;
    double deltaR = sqrt(std::pow((eta-pAssSim.eta()),2) + std::pow(dphi,2));
    if ( deltaR < 0.15 ){
//  if ( deltaR < 0.3 ){
    //if ( (genPc->pdg_id() == 11) && (gsfIter->charge() < 0.) || (genPc->pdg_id() == -11) &&
    //(gsfIter->charge() > 0.) ){
      double tmpSeedRatio = p/pAssSim.t();
      if ( std::abs(tmpSeedRatio-1) < std::abs(seedOkRatio-1) ) {
        seedOkRatio = tmpSeedRatio;
        bestElectronSeed=*gsfIter;
        okSeedFound = true;
      }
    //}
    }
      } // loop over rec ele to look for the best one

      // analysis when the mc track is found
     if (okSeedFound){

    histptMCmatched_->Fill(pAssSim.perp());
    histetaMCmatched_->Fill(pAssSim.eta());
    histeMCmatched_->Fill(pAssSim.rho());
    if (ip<10) {
      mcEnergy[ip] = pAssSim.rho();
      mcEta[ip] = pAssSim.eta();
      mcPhi[ip] = pAssSim.phi();
      mcPt[ip] = pAssSim.perp();
      mcQ[ip] = ((id == 11) ? -1.: +1.);
    }
      }
      
     // efficiency for ecal driven only
      okSeedFound = false;
      seedOkRatio = 999999.;

      // find best matched seed
      for( ElectronSeedCollection::const_iterator gsfIter= (*elSeeds).begin(); gsfIter != (*elSeeds).end(); ++gsfIter) {

        range r=gsfIter->recHits();
        const GeomDet *det=0;
        for (TrackingRecHitCollection::const_iterator rhits=r.first; rhits!=r.second; rhits++) det = pDD->idToDet(((*rhits)).geographicalId());
         TrajectoryStateOnSurface t= trajectoryStateTransform::transientState(gsfIter->startingState(), &(det->surface()), &(*theMagField));

    float eta = t.globalMomentum().eta();
    float phi = t.globalMomentum().phi();
    float p = t.globalMomentum().mag();
        double dphi = phi-pAssSim.phi();
        if (std::abs(dphi)>CLHEP::pi)
         dphi = dphi < 0? (CLHEP::twopi) + dphi : dphi - CLHEP::twopi;
    double deltaR = sqrt(std::pow((eta-pAssSim.eta()),2) + std::pow(dphi,2));
    if (gsfIter->isEcalDriven()) {
    if ( deltaR < 0.15 ){
//  if ( deltaR < 0.3 ){
    //if ( (genPc->pdg_id() == 11) && (gsfIter->charge() < 0.) || (genPc->pdg_id() == -11) &&
    //(gsfIter->charge() > 0.) ){
      double tmpSeedRatio = p/pAssSim.t();
      if ( std::abs(tmpSeedRatio-1) < std::abs(seedOkRatio-1) ) {
        seedOkRatio = tmpSeedRatio;
        bestElectronSeed=*gsfIter;
        okSeedFound = true;
      }
    //}
    }
    } // end if ecal driven
      } // loop over rec ele to look for the best one

      // analysis when the mc track is found
     if (okSeedFound){

    histecaldrivenptMCmatched_->Fill(pAssSim.perp());
    histecaldrivenetaMCmatched_->Fill(pAssSim.eta());
    histecaldriveneMCmatched_->Fill(pAssSim.rho());
      }

      // efficiency for tracker driven only
      okSeedFound = false;
      seedOkRatio = 999999.;

      // find best matched seed
      for( ElectronSeedCollection::const_iterator gsfIter= (*elSeeds).begin(); gsfIter != (*elSeeds).end(); ++gsfIter) {

        range r=gsfIter->recHits();
        const GeomDet *det=0;
        for (TrackingRecHitCollection::const_iterator rhits=r.first; rhits!=r.second; rhits++) det = pDD->idToDet(((*rhits)).geographicalId());
         TrajectoryStateOnSurface t= trajectoryStateTransform::transientState(gsfIter->startingState(), &(det->surface()), &(*theMagField));

    float eta = t.globalMomentum().eta();
    float phi = t.globalMomentum().phi();
    float p = t.globalMomentum().mag();
        double dphi = phi-pAssSim.phi();
        if (std::abs(dphi)>CLHEP::pi)
         dphi = dphi < 0? (CLHEP::twopi) + dphi : dphi - CLHEP::twopi;
    double deltaR = sqrt(std::pow((eta-pAssSim.eta()),2) + std::pow(dphi,2));
    if (gsfIter->isTrackerDriven()) {
    if ( deltaR < 0.15 ){
//  if ( deltaR < 0.3 ){
    //if ( (genPc->pdg_id() == 11) && (gsfIter->charge() < 0.) || (genPc->pdg_id() == -11) &&
    //(gsfIter->charge() > 0.) ){
      double tmpSeedRatio = p/pAssSim.t();
      if ( std::abs(tmpSeedRatio-1) < std::abs(seedOkRatio-1) ) {
        seedOkRatio = tmpSeedRatio;
        bestElectronSeed=*gsfIter;
        okSeedFound = true;
      }
    //}
    }
    } // end if ecal driven
      } // loop over rec ele to look for the best one

      // analysis when the mc track is found
     if (okSeedFound){

    histtrackerdrivenptMCmatched_->Fill(pAssSim.perp());
    histtrackerdrivenetaMCmatched_->Fill(pAssSim.eta());
    histtrackerdriveneMCmatched_->Fill(pAssSim.rho());
      }

     } // end if mother W or Z

    } // end if gen part is electron

    } // end loop on vertices

    ip++;

  } // end loop on gen particles

  //tree_->Fill();

}

void ElectronSeedAnalyzer::beginJob ( void  )

virtual

Reimplemented from edm::EDAnalyzer.

Definition at line 65 of file ElectronSeedAnalyzer.cc.

References histecaldriveneMCmatched_, histecaldrivenetaMCmatched_, histecaldrivenptMCmatched_, histeclu_, histeffeta_, histeffpt_, histeMC_, histeMCmatched_, histeoverp_, histeta_, histetaclu_, histetaMC_, histetaMCmatched_, histetclu_, histfile_, histnbclus_, histnbseeds_, histnrseeds_, histp_, histpt_, histptMC_, histptMCmatched_, histq_, histtrackerdriveneMCmatched_, histtrackerdrivenetaMCmatched_, histtrackerdrivenptMCmatched_, mcEnergy, mcEta, mcPhi, mcPt, mcQ, seedDphi1, seedDphi2, seedDrz1, seedDrz2, seedEta, seedLayer1, seedLayer2, seedMomentum, seedPhi, seedPhi1, seedPhi2, seedPt, seedQ, seedRz1, seedRz2, seedSide1, seedSide2, seedSubdet1, seedSubdet2, superclusterEnergy, superclusterEt, superclusterEta, superclusterPhi, and tree_.

{
  histfile_->cd();
  tree_ = new TTree("ElectronSeeds","ElectronSeed validation ntuple");
  tree_->Branch("mcEnergy",mcEnergy,"mcEnergy[10]/F");
  tree_->Branch("mcEta",mcEta,"mcEta[10]/F");
  tree_->Branch("mcPhi",mcPhi,"mcPhi[10]/F");
  tree_->Branch("mcPt",mcPt,"mcPt[10]/F");
  tree_->Branch("mcQ",mcQ,"mcQ[10]/F");
  tree_->Branch("superclusterEnergy",superclusterEnergy,"superclusterEnergy[10]/F");
  tree_->Branch("superclusterEta",superclusterEta,"superclusterEta[10]/F");
  tree_->Branch("superclusterPhi",superclusterPhi,"superclusterPhi[10]/F");
  tree_->Branch("superclusterEt",superclusterEt,"superclusterEt[10]/F");
  tree_->Branch("seedMomentum",seedMomentum,"seedMomentum[10]/F");
  tree_->Branch("seedEta",seedEta,"seedEta[10]/F");
  tree_->Branch("seedPhi",seedPhi,"seedPhi[10]/F");
  tree_->Branch("seedPt",seedPt,"seedPt[10]/F");
  tree_->Branch("seedQ",seedQ,"seedQ[10]/F");
  tree_->Branch("seedSubdet1",seedSubdet1,"seedSubdet1[10]/I");
  tree_->Branch("seedLayer1",seedLayer1,"seedLayer1[10]/I");
  tree_->Branch("seedSide1",seedSide1,"seedSide1[10]/I");
  tree_->Branch("seedPhi1",seedPhi1,"seedPhi1[10]/F");
  tree_->Branch("seedDphi1",seedDphi1,"seedDphi1[10]/F");
  tree_->Branch("seedDrz1",seedDrz1,"seedDrz1[10]/F");
  tree_->Branch("seedRz1",seedRz1,"seedRz1[10]/F");
  tree_->Branch("seedSubdet2",seedSubdet2,"seedSubdet2[10]/I");
  tree_->Branch("seedLayer2",seedLayer2,"seedLayer2[10]/I");
  tree_->Branch("seedSide2",seedSide2,"seedSide2[10]/I");
  tree_->Branch("seedPhi2",seedPhi2,"seedPhi2[10]/F");
  tree_->Branch("seedDphi2",seedDphi2,"seedDphi2[10]/F");
  tree_->Branch("seedRz2",seedRz2,"seedRz2[10]/F");
  tree_->Branch("seedDrz2",seedDrz2,"seedDrz2[10]/F");
  histeMC_ = new TH1F("eMC","MC particle energy",100,0.,100.);
  histeMCmatched_ = new TH1F("eMCmatched","matched MC particle energy",100,0.,100.);
  histecaldriveneMCmatched_ = new TH1F("ecaldriveneMCmatched","matched MC particle energy, ecal driven",100,0.,100.);
  histtrackerdriveneMCmatched_ = new TH1F("trackerdriveneMCmatched","matched MC particle energy, tracker driven",100,0.,100.);
  histp_ = new TH1F("p","seed p",100,0.,100.);
  histeclu_ = new TH1F("clus energy","supercluster energy",100,0.,100.);
  histpt_ = new TH1F("pt","seed pt",100,0.,100.);
  histptMC_ = new TH1F("ptMC","MC particle pt",100,0.,100.);
  histptMCmatched_ = new TH1F("ptMCmatched","matched MC particle pt",100,0.,100.);
  histecaldrivenptMCmatched_ = new TH1F("ecaldrivenptMCmatched","matched MC particle pt, ecal driven",100,0.,100.);
  histtrackerdrivenptMCmatched_ = new TH1F("trackerdrivenptMCmatched","matched MC particle pt, tracker driven",100,0.,100.);
  histetclu_ = new TH1F("Et","supercluster Et",100,0.,100.);
  histeffpt_ = new TH1F("pt eff","seed effciency vs pt",100,0.,100.);
  histeta_ = new TH1F("seed eta","seed eta",100,-2.5,2.5);
  histetaMC_ = new TH1F("etaMC","MC particle eta",100,-2.5,2.5);
  histetaMCmatched_ = new TH1F("etaMCmatched","matched MC particle eta",100,-2.5,2.5);
  histecaldrivenetaMCmatched_ = new TH1F("ecaldrivenetaMCmatched","matched MC particle eta, ecal driven",100,-2.5,2.5);
  histtrackerdrivenetaMCmatched_ = new TH1F("trackerdrivenetaMCmatched","matched MC particle eta, tracker driven",100,-2.5,2.5);
  histetaclu_ = new TH1F("clus eta","supercluster eta",100,-2.5,2.5);
  histeffeta_ = new TH1F("eta eff","seed effciency vs eta",100,-2.5,2.5);
  histq_ = new TH1F("q","seed charge",100,-2.5,2.5);
  histeoverp_ = new TH1F("E/p","seed E/p",100,0.,10.);
  histnbseeds_ = new TH1I("nrs","Nr of seeds ",50,0.,25.);
  histnbclus_ = new TH1I("nrclus","Nr of superclusters ",50,0.,25.);
  histnrseeds_ = new TH1I("ns","Nr of seeds if clusters",50,0.,25.);
}

void ElectronSeedAnalyzer::endJob ( void  )

virtual

Reimplemented from edm::EDAnalyzer.

Definition at line 124 of file ElectronSeedAnalyzer.cc.

References histecaldriveneMCmatched_, histecaldrivenetaMCmatched_, histecaldrivenptMCmatched_, histeclu_, histeffeta_, histeffpt_, histeMC_, histeMCmatched_, histeoverp_, histeta_, histetaclu_, histetaMC_, histetaMCmatched_, histetclu_, histfile_, histnbclus_, histnbseeds_, histnrseeds_, histp_, histpt_, histptMC_, histptMCmatched_, histq_, histtrackerdriveneMCmatched_, histtrackerdrivenetaMCmatched_, histtrackerdrivenptMCmatched_, and tree_.

{
  histfile_->cd();
  tree_->Print();
  tree_->Write();

  // efficiency vs eta
  TH1F *histetaEff = (TH1F*)histetaMCmatched_->Clone("histetaEff");
  histetaEff->Reset();
  histetaEff->Divide(histetaMCmatched_,histeta_,1,1,"b");
  histetaEff->Print();
  histetaEff->GetXaxis()->SetTitle("#eta");
  histetaEff->GetYaxis()->SetTitle("Efficiency");

  // efficiency vs pt
  TH1F *histptEff = (TH1F*)histptMCmatched_->Clone("histotEff");
  histptEff->Reset();
  histptEff->Divide(histptMCmatched_,histpt_,1,1,"b");
  histptEff->Print();
  histptEff->GetXaxis()->SetTitle("p_{T}");
  histptEff->GetYaxis()->SetTitle("Efficiency");

  histeMCmatched_->Write();
  histecaldriveneMCmatched_->Write();
  histtrackerdriveneMCmatched_->Write();
  histeMC_->Write();
  histp_->Write();
  histeclu_->Write();
  histpt_->Write();
  histptMCmatched_->Write();
  histecaldrivenptMCmatched_->Write();
  histtrackerdrivenptMCmatched_->Write();
  histptMC_->Write();
  histetclu_->Write();
  histeffpt_->Write();
  histeta_->Write();
  histetaMCmatched_->Write();
  histecaldrivenetaMCmatched_->Write();
  histtrackerdrivenetaMCmatched_->Write();
  histetaMC_->Write();
  histetaclu_->Write();
  histeffeta_->Write();
  histq_->Write();
  histeoverp_->Write();
  histnbseeds_->Write();
  histnbclus_->Write();
  histnrseeds_->Write();
}

Member Data Documentation

edm::InputTag ElectronSeedAnalyzer::beamSpot_

private

Definition at line 86 of file ElectronSeedAnalyzer.h.

Referenced by analyze().

TH1F* ElectronSeedAnalyzer::histecaldriveneMCmatched_

private

Definition at line 61 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), beginJob(), and endJob().

TH1F* ElectronSeedAnalyzer::histecaldrivenetaMCmatched_

private

Definition at line 75 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), beginJob(), and endJob().

TH1F* ElectronSeedAnalyzer::histecaldrivenptMCmatched_

private

Definition at line 68 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), beginJob(), and endJob().

TH1F* ElectronSeedAnalyzer::histeclu_

private

Definition at line 64 of file ElectronSeedAnalyzer.h.

Referenced by beginJob(), and endJob().

TH1F* ElectronSeedAnalyzer::histeffeta_

private

Definition at line 78 of file ElectronSeedAnalyzer.h.

Referenced by beginJob(), and endJob().

TH1F* ElectronSeedAnalyzer::histeffpt_

private

Definition at line 71 of file ElectronSeedAnalyzer.h.

Referenced by beginJob(), and endJob().

TH1F* ElectronSeedAnalyzer::histeMC_

private

Definition at line 59 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), beginJob(), endJob(), and ~ElectronSeedAnalyzer().

TH1F* ElectronSeedAnalyzer::histeMCmatched_

private

Definition at line 60 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), beginJob(), and endJob().

TH1F* ElectronSeedAnalyzer::histeoverp_

private

Definition at line 80 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), beginJob(), and endJob().

TH1F* ElectronSeedAnalyzer::histeta_

private

Definition at line 72 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), beginJob(), and endJob().

TH1F* ElectronSeedAnalyzer::histetaclu_

private

Definition at line 77 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), beginJob(), and endJob().

TH1F* ElectronSeedAnalyzer::histetaMC_

private

Definition at line 73 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), beginJob(), and endJob().

TH1F* ElectronSeedAnalyzer::histetaMCmatched_

private

Definition at line 74 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), beginJob(), and endJob().

TH1F* ElectronSeedAnalyzer::histetclu_

private

Definition at line 70 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), beginJob(), and endJob().

TFile* ElectronSeedAnalyzer::histfile_

private

Definition at line 49 of file ElectronSeedAnalyzer.h.

Referenced by beginJob(), ElectronSeedAnalyzer(), endJob(), and ~ElectronSeedAnalyzer().

TH1I* ElectronSeedAnalyzer::histnbclus_

private

Definition at line 83 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), beginJob(), and endJob().

TH1I* ElectronSeedAnalyzer::histnbseeds_

private

Definition at line 82 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), beginJob(), and endJob().

TH1I* ElectronSeedAnalyzer::histnrseeds_

private

Definition at line 81 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), beginJob(), and endJob().

TH1F* ElectronSeedAnalyzer::histp_

private

Definition at line 63 of file ElectronSeedAnalyzer.h.

Referenced by beginJob(), and endJob().

TH1F* ElectronSeedAnalyzer::histpt_

private

Definition at line 65 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), beginJob(), and endJob().

TH1F* ElectronSeedAnalyzer::histptMC_

private

Definition at line 66 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), beginJob(), and endJob().

TH1F* ElectronSeedAnalyzer::histptMCmatched_

private

Definition at line 67 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), beginJob(), and endJob().

TH1F* ElectronSeedAnalyzer::histq_

private

Definition at line 79 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), beginJob(), and endJob().

TH1F* ElectronSeedAnalyzer::histtrackerdriveneMCmatched_

private

Definition at line 62 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), beginJob(), and endJob().

TH1F* ElectronSeedAnalyzer::histtrackerdrivenetaMCmatched_

private

Definition at line 76 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), beginJob(), and endJob().

TH1F* ElectronSeedAnalyzer::histtrackerdrivenptMCmatched_

private

Definition at line 69 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), beginJob(), and endJob().

edm::InputTag ElectronSeedAnalyzer::inputCollection_

private

Definition at line 85 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and ElectronSeedAnalyzer().

float ElectronSeedAnalyzer::mcEnergy[10]

private

Definition at line 51 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

float ElectronSeedAnalyzer::mcEta[10]

private

Definition at line 51 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

float ElectronSeedAnalyzer::mcPhi[10]

private

Definition at line 51 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

float ElectronSeedAnalyzer::mcPt[10]

private

Definition at line 51 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

float ElectronSeedAnalyzer::mcQ[10]

private

Definition at line 51 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

float ElectronSeedAnalyzer::seedDphi1[10]

private

Definition at line 57 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

float ElectronSeedAnalyzer::seedDphi2[10]

private

Definition at line 57 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

float ElectronSeedAnalyzer::seedDrz1[10]

private

Definition at line 57 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

float ElectronSeedAnalyzer::seedDrz2[10]

private

Definition at line 57 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

float ElectronSeedAnalyzer::seedEta[10]

private

Definition at line 53 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

int ElectronSeedAnalyzer::seedLayer1[10]

private

Definition at line 55 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

int ElectronSeedAnalyzer::seedLayer2[10]

private

Definition at line 55 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

float ElectronSeedAnalyzer::seedMomentum[10]

private

Definition at line 53 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

float ElectronSeedAnalyzer::seedPhi[10]

private

Definition at line 53 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

float ElectronSeedAnalyzer::seedPhi1[10]

private

Definition at line 58 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

float ElectronSeedAnalyzer::seedPhi2[10]

private

Definition at line 58 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

float ElectronSeedAnalyzer::seedPt[10]

private

Definition at line 53 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

float ElectronSeedAnalyzer::seedQ[10]

private

Definition at line 53 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

float ElectronSeedAnalyzer::seedRz1[10]

private

Definition at line 58 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

float ElectronSeedAnalyzer::seedRz2[10]

private

Definition at line 58 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

int ElectronSeedAnalyzer::seedSide1[10]

private

Definition at line 56 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

int ElectronSeedAnalyzer::seedSide2[10]

private

Definition at line 56 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

int ElectronSeedAnalyzer::seedSubdet1[10]

private

Definition at line 54 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

int ElectronSeedAnalyzer::seedSubdet2[10]

private

Definition at line 54 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

float ElectronSeedAnalyzer::superclusterEnergy[10]

private

Definition at line 52 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

float ElectronSeedAnalyzer::superclusterEt[10]

private

Definition at line 52 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

float ElectronSeedAnalyzer::superclusterEta[10]

private

Definition at line 52 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

float ElectronSeedAnalyzer::superclusterPhi[10]

private

Definition at line 52 of file ElectronSeedAnalyzer.h.

Referenced by analyze(), and beginJob().

TrajectoryStateTransform ElectronSeedAnalyzer::transformer_

private

Definition at line 47 of file ElectronSeedAnalyzer.h.

TTree* ElectronSeedAnalyzer::tree_

private

Definition at line 50 of file ElectronSeedAnalyzer.h.

Referenced by beginJob(), and endJob().