/data/refman/pasoursint/CMSSW_6_1_1/src/RecoBTag/SoftLepton/plugins/SoftPFElectronProducer.cc

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#include "RecoBTag/SoftLepton/plugins/SoftPFElectronProducer.h"
#include "DataFormats/EgammaCandidates/interface/GsfElectron.h"
#include "DataFormats/EgammaCandidates/interface/GsfElectronFwd.h"
#include "DataFormats/GsfTrackReco/interface/GsfTrack.h"
#include "DataFormats/GsfTrackReco/interface/GsfTrackFwd.h"
#include "DataFormats/Math/interface/deltaR.h"
#include "DataFormats/Math/interface/Vector3D.h"
#include "DataFormats/Math/interface/Point3D.h"
#include "FWCore/Utilities/interface/EDMException.h"
#include "FWCore/Framework/interface/Frameworkfwd.h"

#include <cmath>

SoftPFElectronProducer::SoftPFElectronProducer (const edm::ParameterSet& conf)
{
    gsfElectronTag_ = conf.getParameter<edm::InputTag>("Electrons");

    barrelPtCuts_                    = conf.getParameter<std::vector<double> >("BarrelPtCuts");
    barreldRGsfTrackElectronCuts_    = conf.getParameter<std::vector<double> >("BarreldRGsfTrackElectronCuts");
    barrelEemPinRatioCuts_           = conf.getParameter<std::vector<double> >("BarrelEemPinRatioCuts");
    barrelMVACuts_                   = conf.getParameter<std::vector<double> >("BarrelMVACuts");
    barrelInversedRFirstLastHitCuts_ = conf.getParameter<std::vector<double> >("BarrelInversedRFirstLastHitCuts");
    barrelRadiusFirstHitCuts_        = conf.getParameter<std::vector<double> >("BarrelRadiusFirstHitCuts");
    barrelZFirstHitCuts_             = conf.getParameter<std::vector<double> >("BarrelZFirstHitCuts");

    forwardPtCuts_                   = conf.getParameter<std::vector<double> >("ForwardPtCuts");
    forwardInverseFBremCuts_         = conf.getParameter<std::vector<double> >("ForwardInverseFBremCuts");
    forwarddRGsfTrackElectronCuts_   = conf.getParameter<std::vector<double> >("ForwarddRGsfTrackElectronCuts");
    forwardRadiusFirstHitCuts_       = conf.getParameter<std::vector<double> >("ForwardRadiusFirstHitCuts");
    forwardZFirstHitCuts_            = conf.getParameter<std::vector<double> >("ForwardZFirstHitCuts");
    forwardMVACuts_                  = conf.getParameter<std::vector<double> >("ForwardMVACuts");

    produces<reco::GsfElectronCollection>();
}

SoftPFElectronProducer::~SoftPFElectronProducer()
{

}

void SoftPFElectronProducer::produce(edm::Event& iEvent, const edm::EventSetup& iSetup)
{
  std::auto_ptr<reco::GsfElectronCollection> output(new reco::GsfElectronCollection);

  edm::Handle<reco::GsfElectronCollection> gsfCandidates;
  iEvent.getByLabel(gsfElectronTag_, gsfCandidates);

  // this will throw if the input collection is not present
  const reco::GsfElectronCollection & gsfCollection = *(gsfCandidates.product());

  for (unsigned int i = 0 ; i != gsfCollection.size(); ++i)
  {
    if (not isClean(gsfCollection[i]))
      continue;

    output->push_back(gsfCollection[i]);
  }

  iEvent.put(output);
}

bool SoftPFElectronProducer::isClean(const reco::GsfElectron& gsfcandidate)
{
  const double ecalEnergy            = gsfcandidate.superCluster()->energy();
  const double pIn                   = gsfcandidate.gsfTrack()->innerMomentum().R();
  const double pOut                  = gsfcandidate.gsfTrack()->outerMomentum().R();
  const double EemPinRatio           = (ecalEnergy - pIn)/(ecalEnergy + pIn);
  //const double EemPoutRatio          = (ecalEnergy - pOut)/(ecalEnergy + pOut);
  const double pt                    = gsfcandidate.pt();
  const double fbrem                 = (pIn - pOut)/pIn;
  const double dRGsfTrackElectron    = deltaR(gsfcandidate.gsfTrack()->eta(), gsfcandidate.gsfTrack()->phi(), gsfcandidate.eta(), gsfcandidate.phi());
  const double mva                   = gsfcandidate.mva();
  const math::XYZPoint firstHit      = gsfcandidate.gsfTrack()->innerPosition();
  const math::XYZPoint lastHit       = gsfcandidate.gsfTrack()->outerPosition();
  const double inversedRFirstLastHit = 1.0/deltaR(firstHit.eta(), firstHit.phi(), lastHit.eta(), lastHit.phi());
  const double radiusFirstHit        = firstHit.Rho();
  const double zFirstHit             = firstHit.Z();
  /*std::cout << "This particle has " << pt << " "
                                    << 1.0/fbrem << " "
                                    << dRGsfTrackElectron << " "
                                    << EemPoutRatio << " "
                                    << mva << std::endl;*/
  if(fabs(gsfcandidate.eta()) < 1.5)
  {
    // use barrel cuts
    if( barrelPtCuts_.front()                    > pt                    || barrelPtCuts_.back()                    < pt)                    return false;
    if( barreldRGsfTrackElectronCuts_.front()    > dRGsfTrackElectron    || barreldRGsfTrackElectronCuts_.back()    < dRGsfTrackElectron)    return false;
    if( barrelEemPinRatioCuts_.front()           > EemPinRatio           || barrelEemPinRatioCuts_.back()           < EemPinRatio)           return false;
    if( barrelMVACuts_.front()                   > mva                   || barrelMVACuts_.back()                   < mva)                   return false;
    if( barrelInversedRFirstLastHitCuts_.front() > inversedRFirstLastHit || barrelInversedRFirstLastHitCuts_.back() < inversedRFirstLastHit) return false;
    if( barrelRadiusFirstHitCuts_.front()        > radiusFirstHit        || barrelRadiusFirstHitCuts_.back()        < radiusFirstHit)        return false;
    if( barrelZFirstHitCuts_.front()             > zFirstHit             || barrelZFirstHitCuts_.back()             < zFirstHit)             return false;
  }
  else
  {
    // use endcap cuts
    if( forwardPtCuts_.front()                 > pt                 || forwardPtCuts_.back()                 < pt)                 return false;
    if( forwardInverseFBremCuts_.front()       > 1.0/fbrem          || forwardInverseFBremCuts_.back()       < 1.0/fbrem)          return false;
    if( forwarddRGsfTrackElectronCuts_.front() > dRGsfTrackElectron || forwarddRGsfTrackElectronCuts_.back() < dRGsfTrackElectron) return false;
    if( forwardRadiusFirstHitCuts_.front()     > radiusFirstHit     || forwardRadiusFirstHitCuts_.back()     < radiusFirstHit)     return false;
    if( forwardZFirstHitCuts_.front()          > zFirstHit          || forwardZFirstHitCuts_.back()          < zFirstHit)          return false;
    if( forwardMVACuts_.front()                > mva                || forwardMVACuts_.back()                < mva)                return false;
  }

  return true;
}