MuonTrackAnalyzer.cc

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#include "Validation/RecoMuon/src/MuonTrackAnalyzer.h"

// Collaborating Class Header
#include "FWCore/Framework/interface/Frameworkfwd.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"

#include "Geometry/CommonDetUnit/interface/GeomDet.h"

#include "TrackingTools/TransientTrack/interface/TransientTrack.h"
#include "DataFormats/TrajectorySeed/interface/TrajectorySeedCollection.h"
#include "DataFormats/TrackReco/interface/Track.h"
#include "DataFormats/TrajectorySeed/interface/TrajectorySeedCollection.h"
#include "TrackingTools/DetLayers/interface/DetLayer.h"
#include "DataFormats/Math/interface/deltaR.h"

#include "TrackingTools/TrajectoryState/interface/TrajectoryStateTransform.h"

#include "CommonTools/Statistics/interface/ChiSquaredProbability.h"

#include "RecoMuon/TrackingTools/interface/MuonPatternRecoDumper.h"
#include "RecoMuon/TrackingTools/interface/MuonServiceProxy.h"
#include "RecoMuon/TrackingTools/interface/MuonUpdatorAtVertex.h"

#include "Validation/RecoMuon/src/Histograms.h"
#include "Validation/RecoMuon/src/HTrack.h"

#include "SimDataFormats/TrackingHit/interface/PSimHit.h"
#include "SimDataFormats/TrackingHit/interface/PSimHitContainer.h"
#include "SimDataFormats/Track/interface/SimTrackContainer.h"

#include "TFile.h"
#include "TH1F.h"
#include "TH2F.h"

using namespace std;
using namespace edm;

MuonTrackAnalyzer::MuonTrackAnalyzer(const ParameterSet& pset){
  
  // service parameters
  ParameterSet serviceParameters = pset.getParameter<ParameterSet>("ServiceParameters");
  // the services
  theService = new MuonServiceProxy(serviceParameters);
  
  theTracksLabel = pset.getParameter<InputTag>("Tracks");
  doTracksAnalysis = pset.getUntrackedParameter<bool>("DoTracksAnalysis",true);

  doSeedsAnalysis = pset.getUntrackedParameter<bool>("DoSeedsAnalysis",false);
  if(doSeedsAnalysis){
    theSeedsLabel = pset.getParameter<InputTag>("MuonSeed");
    ParameterSet updatorPar = pset.getParameter<ParameterSet>("MuonUpdatorAtVertexParameters");
    theSeedPropagatorName = updatorPar.getParameter<string>("Propagator");

    theUpdator = new MuonUpdatorAtVertex(updatorPar,theService);
  }
  
  theCSCSimHitLabel = pset.getParameter<InputTag>("CSCSimHit");
  theDTSimHitLabel = pset.getParameter<InputTag>("DTSimHit");
  theRPCSimHitLabel = pset.getParameter<InputTag>("RPCSimHit");

  theEtaRange = (EtaRange) pset.getParameter<int>("EtaRange");
  
  // number of sim tracks
  numberOfSimTracks=0;
  // number of reco tracks
  numberOfRecTracks=0;

  dbe_ = edm::Service<DQMStore>().operator->();
  out = pset.getUntrackedParameter<string>("rootFileName");
  dirName_ = pset.getUntrackedParameter<std::string>("dirName");

}

MuonTrackAnalyzer::~MuonTrackAnalyzer(){
  if (theService) delete theService;
}

void MuonTrackAnalyzer::beginJob(){
  dbe_->showDirStructure();
  
  dbe_->cd();
  InputTag algo = theTracksLabel;
  string dirName=dirName_;
  if (algo.process()!="")
    dirName+=algo.process()+"_";
  if(algo.label()!="")
    dirName+=algo.label()+"_";
  if(algo.instance()!="")
    dirName+=algo.instance()+"";      
  if (dirName.find("Tracks")<dirName.length()){
    dirName.replace(dirName.find("Tracks"),6,"");
  }
  std::replace(dirName.begin(), dirName.end(), ':', '_');
  dbe_->setCurrentFolder(dirName.c_str());
  
  //dbe_->goUp();
  std::string simName = dirName;
  simName+="/SimTracks";
  hSimTracks = new HTrackVariables(simName.c_str(),"SimTracks"); 

  dbe_->cd();
  dbe_->setCurrentFolder(dirName.c_str());

  // Create the root file
  //theFile = new TFile(theRootFileName.c_str(), "RECREATE");

  if(doSeedsAnalysis){
    dbe_->cd();
    dbe_->setCurrentFolder(dirName.c_str());
    hRecoSeedInner = new HTrack(dirName.c_str(),"RecoSeed","Inner");
    hRecoSeedPCA = new HTrack(dirName.c_str(),"RecoSeed","PCA");
  }
  
  if(doTracksAnalysis){
    dbe_->cd();
    dbe_->setCurrentFolder(dirName.c_str());    
    hRecoTracksPCA = new HTrack(dirName.c_str(),"RecoTracks","PCA"); 
    hRecoTracksInner = new HTrack(dirName.c_str(),"RecoTracks","Inner"); 
    hRecoTracksOuter = new HTrack(dirName.c_str(),"RecoTracks","Outer"); 

    dbe_->cd();
    dbe_->setCurrentFolder(dirName.c_str());
    
    // General Histos


    hChi2 = dbe_->book1D("chi2","#chi^2",200,0,200);
    hChi2VsEta = dbe_->book2D("chi2VsEta","#chi^2 VS #eta",120,-3.,3.,200,0,200);
    
    hChi2Norm = dbe_->book1D("chi2Norm","Normalized #chi^2",400,0,100);
    hChi2NormVsEta = dbe_->book2D("chi2NormVsEta","Normalized #chi^2 VS #eta",120,-3.,3.,400,0,100);
    
    hHitsPerTrack  = dbe_->book1D("HitsPerTrack","Number of hits per track",55,0,55);
    hHitsPerTrackVsEta  = dbe_->book2D("HitsPerTrackVsEta","Number of hits per track VS #eta",
                   120,-3.,3.,55,0,55);
    
    hDof  = dbe_->book1D("dof","Number of Degree of Freedom",55,0,55);
    hDofVsEta  = dbe_->book2D("dofVsEta","Number of Degree of Freedom VS #eta",120,-3.,3.,55,0,55);
    
    hChi2Prob = dbe_->book1D("chi2Prob","#chi^2 probability",200,0,1);
    hChi2ProbVsEta = dbe_->book2D("chi2ProbVsEta","#chi^2 probability VS #eta",120,-3.,3.,200,0,1);
    
    hNumberOfTracks = dbe_->book1D("NumberOfTracks","Number of reconstructed tracks per event",200,0,200);
    hNumberOfTracksVsEta = dbe_->book2D("NumberOfTracksVsEta",
                    "Number of reconstructed tracks per event VS #eta",
                    120,-3.,3.,10,0,10);
    
    hChargeVsEta = dbe_->book2D("ChargeVsEta","Charge vs #eta gen",120,-3.,3.,4,-2.,2.);
    hChargeVsPt = dbe_->book2D("ChargeVsPt","Charge vs P_{T} gen",250,0,200,4,-2.,2.);
    hPtRecVsPtGen = dbe_->book2D("PtRecVsPtGen","P_{T} rec vs P_{T} gen",250,0,200,250,0,200);

    hDeltaPtVsEta = dbe_->book2D("DeltaPtVsEta","#Delta P_{t} vs #eta gen",120,-3.,3.,500,-250.,250.);
    hDeltaPt_In_Out_VsEta = dbe_->book2D("DeltaPt_In_Out_VsEta_","P^{in}_{t} - P^{out}_{t} vs #eta gen",120,-3.,3.,500,-250.,250.);
  }    

  //theFile->cd();
}

void MuonTrackAnalyzer::endJob(){
  LogInfo("MuonTrackAnalyzer")<< "Number of Sim tracks: " << numberOfSimTracks;

  LogInfo("MuonTrackAnalyzer") << "Number of Reco tracks: " << numberOfRecTracks;

  
  if(doTracksAnalysis){
    double eff = hRecoTracksPCA->computeEfficiency(hSimTracks);
    LogInfo("MuonTrackAnalyzer") <<" *Track Efficiency* = "<< eff <<"%";
  }

  if(doSeedsAnalysis){
    double eff = hRecoSeedInner->computeEfficiency(hSimTracks);
    LogInfo("MuonTrackAnalyzer")<<" *Seed Efficiency* = "<< eff <<"%";
  }

  if ( out.size() != 0 && dbe_ ) dbe_->save(out);
}

void MuonTrackAnalyzer::analyze(const Event & event, const EventSetup& eventSetup){
  
  LogDebug("MuonTrackAnalyzer") << "Run: " << event.id().run() << " Event: " << event.id().event();

  // Update the services
  theService->update(eventSetup);

  Handle<SimTrackContainer> simTracks;
  event.getByLabel("g4SimHits",simTracks);  
  fillPlots(event,simTracks);

  
  if(doTracksAnalysis)
    tracksAnalysis(event,eventSetup,simTracks);
  
  if(doSeedsAnalysis)
    seedsAnalysis(event,eventSetup,simTracks);
  

}

void MuonTrackAnalyzer::seedsAnalysis(const Event & event, const EventSetup& eventSetup,
                      Handle<SimTrackContainer> simTracks){

  MuonPatternRecoDumper debug;

  // Get the RecTrack collection from the event
  Handle<TrajectorySeedCollection> seeds;
  event.getByLabel(theSeedsLabel, seeds);
  
  LogTrace("MuonTrackAnalyzer")<<"Number of reconstructed seeds: " << seeds->size()<<endl;

  for(TrajectorySeedCollection::const_iterator seed = seeds->begin(); 
      seed != seeds->end(); ++seed){
    TrajectoryStateOnSurface seedTSOS = getSeedTSOS(*seed);
    pair<SimTrack,double> sim = getSimTrack(seedTSOS,simTracks);
    fillPlots(seedTSOS, sim.first,
          hRecoSeedInner, debug);
    
    std::pair<bool,FreeTrajectoryState> propSeed =
      theUpdator->propagateToNominalLine(seedTSOS);
    if(propSeed.first)
      fillPlots(propSeed.second, sim.first,
        hRecoSeedPCA, debug);
    else
      LogTrace("MuonTrackAnalyzer")<<"Error in seed propagation"<<endl;
   
  }
}


void MuonTrackAnalyzer::tracksAnalysis(const Event & event, const EventSetup& eventSetup,
                      Handle<SimTrackContainer> simTracks){
  MuonPatternRecoDumper debug;
  
  
  // Get the RecTrack collection from the event
  Handle<reco::TrackCollection> tracks;
  event.getByLabel(theTracksLabel, tracks);

  LogTrace("MuonTrackAnalyzer")<<"Reconstructed tracks: " << tracks->size() << endl;
  hNumberOfTracks->Fill(tracks->size());
  
  if(tracks->size()) numberOfRecTracks++;
  
  // Loop over the Rec tracks
  for(reco::TrackCollection::const_iterator t = tracks->begin(); t != tracks->end(); ++t) {
    
    reco::TransientTrack track(*t,&*theService->magneticField(),theService->trackingGeometry()); 

    TrajectoryStateOnSurface outerTSOS = track.outermostMeasurementState();
    TrajectoryStateOnSurface innerTSOS = track.innermostMeasurementState();
    TrajectoryStateOnSurface pcaTSOS   = track.impactPointState();

    pair<SimTrack,double> sim = getSimTrack(pcaTSOS,simTracks);
    SimTrack simTrack = sim.first;
    hNumberOfTracksVsEta->Fill(simTrack.momentum().eta(), tracks->size());
    fillPlots(track,simTrack);
    
    LogTrace("MuonTrackAnalyzer") << "State at the outer surface: " << endl; 
    fillPlots(outerTSOS,simTrack,hRecoTracksOuter,debug);

    LogTrace("MuonTrackAnalyzer") << "State at the inner surface: " << endl; 
    fillPlots(innerTSOS,simTrack,hRecoTracksInner,debug);

    LogTrace("MuonTrackAnalyzer") << "State at PCA: " << endl; 
    fillPlots(pcaTSOS,simTrack,hRecoTracksPCA,debug);
    
    double deltaPt_in_out = innerTSOS.globalMomentum().perp()-outerTSOS.globalMomentum().perp();
    hDeltaPt_In_Out_VsEta->Fill(simTrack.momentum().eta(),deltaPt_in_out);

    double deltaPt_pca_sim = pcaTSOS.globalMomentum().perp()-sqrt(simTrack.momentum().Perp2());
    hDeltaPtVsEta->Fill(simTrack.momentum().eta(),deltaPt_pca_sim);
    
    hChargeVsEta->Fill(simTrack.momentum().eta(),pcaTSOS.charge());
    
    hChargeVsPt->Fill(sqrt(simTrack.momentum().perp2()),pcaTSOS.charge());
    
    hPtRecVsPtGen->Fill(sqrt(simTrack.momentum().perp2()),pcaTSOS.globalMomentum().perp());    
  }
  LogTrace("MuonTrackAnalyzer")<<"--------------------------------------------"<<endl;  
}




void  MuonTrackAnalyzer::fillPlots(const Event &event, edm::Handle<edm::SimTrackContainer> &simTracks){
  
  if(!checkMuonSimHitPresence(event,simTracks)) return;
  
  // Loop over the Sim tracks
  SimTrackContainer::const_iterator simTrack;
  LogTrace("MuonTrackAnalyzer")<<"Simulated tracks: "<<simTracks->size()<<endl;
  
  for (simTrack = simTracks->begin(); simTrack != simTracks->end(); ++simTrack)
    if (abs((*simTrack).type()) == 13) {
      
      if( !isInTheAcceptance( (*simTrack).momentum().eta()) ) continue; // FIXME!!
      
    numberOfSimTracks++;
    
    LogTrace("MuonTrackAnalyzer")<<"Simualted muon:"<<endl;
    LogTrace("MuonTrackAnalyzer")<<"Sim pT: "<<sqrt((*simTrack).momentum().perp2())<<endl;
    LogTrace("MuonTrackAnalyzer")<<"Sim Eta: "<<(*simTrack).momentum().eta()<<endl; // FIXME
    
    hSimTracks->Fill((*simTrack).momentum().mag(), 
             sqrt((*simTrack).momentum().perp2()), 
             (*simTrack).momentum().eta(), 
             (*simTrack).momentum().phi(), 
             -(*simTrack).type()/ abs((*simTrack).type()) ); // Double FIXME  
    LogTrace("MuonTrackAnalyzer") << "hSimTracks filled" << endl;
    }
  
  LogTrace("MuonTrackAnalyzer") << endl; 
}
  

void  MuonTrackAnalyzer::fillPlots(reco::TransientTrack &track, SimTrack &simTrack){

  LogTrace("MuonTrackAnalyzer")<<"Analizer: New track, chi2: "<<track.chi2()<<" dof: "<<track.ndof()<<endl;
  hChi2->Fill(track.chi2());
  hDof->Fill(track.ndof());
  hChi2Norm->Fill(track.normalizedChi2());
  hHitsPerTrack->Fill(track.recHitsSize());
  
  hChi2Prob->Fill( ChiSquaredProbability(track.chi2(),track.ndof()) );

  hChi2VsEta->Fill(simTrack.momentum().eta(),track.chi2());
  hChi2NormVsEta->Fill(simTrack.momentum().eta(),track.normalizedChi2());
  hChi2ProbVsEta->Fill(simTrack.momentum().eta(),ChiSquaredProbability(track.chi2(),track.ndof()));     
  hHitsPerTrackVsEta->Fill(simTrack.momentum().eta(),track.recHitsSize());
  hDofVsEta->Fill(simTrack.momentum().eta(),track.ndof()); 
}


void  MuonTrackAnalyzer::fillPlots(TrajectoryStateOnSurface &recoTSOS,SimTrack &simTrack,
                   HTrack *histo, MuonPatternRecoDumper &debug){
  
  LogTrace("MuonTrackAnalyzer") << debug.dumpTSOS(recoTSOS)<<endl;
  histo->Fill(recoTSOS);
  
  GlobalVector tsosVect = recoTSOS.globalMomentum();
  math::XYZVectorD reco(tsosVect.x(), tsosVect.y(), tsosVect.z());
  double deltaRVal = deltaR<double>(reco.eta(),reco.phi(),
                    simTrack.momentum().eta(),simTrack.momentum().phi());
  histo->FillDeltaR(deltaRVal);

  histo->computeResolutionAndPull(recoTSOS,simTrack);
}


void  MuonTrackAnalyzer::fillPlots(FreeTrajectoryState &recoFTS,SimTrack &simTrack,
                   HTrack *histo, MuonPatternRecoDumper &debug){
  
  LogTrace("MuonTrackAnalyzer") << debug.dumpFTS(recoFTS)<<endl;
  histo->Fill(recoFTS);
  
  GlobalVector ftsVect = recoFTS.momentum();
  math::XYZVectorD reco(ftsVect.x(), ftsVect.y(), ftsVect.z());
  double deltaRVal = deltaR<double>(reco.eta(),reco.phi(),
                    simTrack.momentum().eta(),simTrack.momentum().phi());
  histo->FillDeltaR(deltaRVal);

  histo->computeResolutionAndPull(recoFTS,simTrack);
}

pair<SimTrack,double> MuonTrackAnalyzer::getSimTrack(TrajectoryStateOnSurface &tsos,
                             Handle<SimTrackContainer> simTracks){
  
//   // Loop over the Sim tracks
//   SimTrackContainer::const_iterator simTrack;
  
//   SimTrack result;
//   int mu=0;
//   for (simTrack = simTracks->begin(); simTrack != simTracks->end(); ++simTrack)
//     if (abs((*simTrack).type()) == 13) { 
//       result = *simTrack;
//       ++mu;
//     }
  
//   if(mu != 1) LogTrace("MuonTrackAnalyzer") << "WARNING!! more than 1 simulated muon!!" <<endl;
//   return result;


  // Loop over the Sim tracks
  SimTrackContainer::const_iterator simTrack;
  
  SimTrack result;

  double bestDeltaR = 10e5;
  for (simTrack = simTracks->begin(); simTrack != simTracks->end(); ++simTrack){
    if (abs((*simTrack).type()) != 13) continue;
    
    //    double newDeltaR = tsos.globalMomentum().basicVector().deltaR(simTrack->momentum().vect());
    GlobalVector tsosVect = tsos.globalMomentum();
    math::XYZVectorD vect(tsosVect.x(), tsosVect.y(), tsosVect.z());
    double newDeltaR = deltaR<double>(vect.eta(),vect.phi(),
                      simTrack->momentum().eta(),simTrack->momentum().phi());

    if (  newDeltaR < bestDeltaR ) {
      LogTrace("MuonTrackAnalyzer") << "Matching Track with DeltaR = " << newDeltaR<<endl;
      bestDeltaR = newDeltaR;
      result  = *simTrack;
    }
  } 
  return pair<SimTrack,double>(result,bestDeltaR);
}


bool MuonTrackAnalyzer::isInTheAcceptance(double eta){
  switch(theEtaRange){
  case all:
    return ( abs(eta) <= 2.4 ) ? true : false;
  case barrel:
    return ( abs(eta) < 1.1 ) ? true : false;
  case endcap:
    return ( abs(eta) >= 1.1 && abs(eta) <= 2.4 ) ? true : false;  
  default:
    {LogTrace("MuonTrackAnalyzer")<<"No correct Eta range selected!! "<<endl; return false;}
  }
}

bool MuonTrackAnalyzer::checkMuonSimHitPresence(const Event & event,
                        edm::Handle<edm::SimTrackContainer> simTracks){

  // Get the SimHit collection from the event
  Handle<PSimHitContainer> dtSimHits;
  event.getByLabel(theDTSimHitLabel.instance(),theDTSimHitLabel.label(), dtSimHits);
  
  Handle<PSimHitContainer> cscSimHits;
  event.getByLabel(theCSCSimHitLabel.instance(),theCSCSimHitLabel.label(), cscSimHits);
  
  Handle<PSimHitContainer> rpcSimHits;
  event.getByLabel(theRPCSimHitLabel.instance(),theRPCSimHitLabel.label(), rpcSimHits);  
  
  map<unsigned int, vector<const PSimHit*> > mapOfMuonSimHits;
  
  for(PSimHitContainer::const_iterator simhit = dtSimHits->begin();
      simhit != dtSimHits->end(); ++simhit) {
    if (abs(simhit->particleType()) != 13) continue;
    mapOfMuonSimHits[simhit->trackId()].push_back(&*simhit);
  }
  
  for(PSimHitContainer::const_iterator simhit = cscSimHits->begin();
      simhit != cscSimHits->end(); ++simhit) {
    if (abs(simhit->particleType()) != 13) continue;
    mapOfMuonSimHits[simhit->trackId()].push_back(&*simhit);
  }
  
  for(PSimHitContainer::const_iterator simhit = rpcSimHits->begin();
      simhit != rpcSimHits->end(); ++simhit) {
    if (abs(simhit->particleType()) != 13) continue;
    mapOfMuonSimHits[simhit->trackId()].push_back(&*simhit);
  }

  bool presence = false;

  for (SimTrackContainer::const_iterator simTrack = simTracks->begin(); 
       simTrack != simTracks->end(); ++simTrack){
    
    if (abs(simTrack->type()) != 13) continue;
    
    map<unsigned int, vector<const PSimHit*> >::const_iterator mapIterator = 
      mapOfMuonSimHits.find(simTrack->trackId());
    
    if (mapIterator != mapOfMuonSimHits.end())
      presence = true;
  }
  
  return presence;
}

TrajectoryStateOnSurface MuonTrackAnalyzer::getSeedTSOS(const TrajectorySeed& seed){

  // Get the Trajectory State on Det (persistent version of a TSOS) from the seed
  PTrajectoryStateOnDet pTSOD = seed.startingState();

  // Transform it in a TrajectoryStateOnSurface
  

  DetId seedDetId(pTSOD.detId());

  const GeomDet* gdet = theService->trackingGeometry()->idToDet( seedDetId );

  TrajectoryStateOnSurface initialState = trajectoryStateTransform::transientState(pTSOD, &(gdet->surface()), &*theService->magneticField());

  // Get the layer on which the seed relies
  const DetLayer *initialLayer = theService->detLayerGeometry()->idToLayer( seedDetId );

  PropagationDirection detLayerOrder = oppositeToMomentum;

  // ask for compatible layers
  vector<const DetLayer*> detLayers;
  detLayers = initialLayer->compatibleLayers( *initialState.freeState(),detLayerOrder);
  
  TrajectoryStateOnSurface result = initialState;
  if(detLayers.size()){
    const DetLayer* finalLayer = detLayers.back();
    const TrajectoryStateOnSurface propagatedState = theService->propagator(theSeedPropagatorName)->propagate(initialState, finalLayer->surface());
    if(propagatedState.isValid())
      result = propagatedState;
  }
  
  return result;
}