EgammaHLTEcalPFClusterIsolationProducer.cc

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#include <iostream>
#include <vector>
#include <memory>

#include "RecoEgamma/EgammaHLTProducers/interface/EgammaHLTEcalPFClusterIsolationProducer.h"

// Framework
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/EventSetup.h"
#include "DataFormats/Common/interface/Handle.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/Utilities/interface/Exception.h"
#include "FWCore/ParameterSet/interface/ConfigurationDescriptions.h"
#include "FWCore/ParameterSet/interface/ParameterSetDescription.h"

#include "DataFormats/RecoCandidate/interface/RecoEcalCandidate.h"
#include "DataFormats/RecoCandidate/interface/RecoEcalCandidateIsolation.h"

#include "DataFormats/ParticleFlowReco/interface/PFCluster.h"
#include "DataFormats/ParticleFlowReco/interface/PFClusterFwd.h"

#include "DataFormats/EgammaReco/interface/SuperCluster.h"

#include "DataFormats/Common/interface/RefToPtr.h"

#include <DataFormats/Math/interface/deltaR.h>

EgammaHLTEcalPFClusterIsolationProducer::EgammaHLTEcalPFClusterIsolationProducer(const edm::ParameterSet& config) {

  recoEcalCandidateProducer_ = consumes<reco::RecoEcalCandidateCollection>(config.getParameter<edm::InputTag>("recoEcalCandidateProducer"));
  pfClusterProducer_         = consumes<reco::PFClusterCollection>(config.getParameter<edm::InputTag>("pfClusterProducer"));

  drMax_          = config.getParameter<double>("drMax");
  drVetoBarrel_   = config.getParameter<double>("drVetoBarrel");
  drVetoEndcap_   = config.getParameter<double>("drVetoEndcap");
  etaStripBarrel_ = config.getParameter<double>("etaStripBarrel");
  etaStripEndcap_ = config.getParameter<double>("etaStripEndcap");
  energyBarrel_   = config.getParameter<double>("energyBarrel");
  energyEndcap_   = config.getParameter<double>("energyEndcap");

  doRhoCorrection_                = config.getParameter<bool>("doRhoCorrection");
  if (doRhoCorrection_)
    rhoProducer_                    = consumes<double>(config.getParameter<edm::InputTag>("rhoProducer"));
  
  rhoMax_                         = config.getParameter<double>("rhoMax"); 
  rhoScale_                       = config.getParameter<double>("rhoScale"); 
  effectiveAreaBarrel_            = config.getParameter<double>("effectiveAreaBarrel");
  effectiveAreaEndcap_            = config.getParameter<double>("effectiveAreaEndcap");

  produces < reco::RecoEcalCandidateIsolationMap >();

}

EgammaHLTEcalPFClusterIsolationProducer::~EgammaHLTEcalPFClusterIsolationProducer()
{}

void EgammaHLTEcalPFClusterIsolationProducer::fillDescriptions(edm::ConfigurationDescriptions& descriptions) {
  edm::ParameterSetDescription desc;
  desc.add<edm::InputTag>("recoEcalCandidateProducer", edm::InputTag("hltL1SeededRecoEcalCandidatePF"));
  desc.add<edm::InputTag>("pfClusterProducer", edm::InputTag("hltParticleFlowClusterECAL")); 
  desc.add<edm::InputTag>("rhoProducer", edm::InputTag("fixedGridRhoFastjetAllCalo"));
  desc.add<bool>("doRhoCorrection", false);
  desc.add<double>("rhoMax", 9.9999999E7); 
  desc.add<double>("rhoScale", 1.0); 
  desc.add<double>("effectiveAreaBarrel", 0.101);
  desc.add<double>("effectiveAreaEndcap", 0.046);
  desc.add<double>("drMax", 0.3);
  desc.add<double>("drVetoBarrel", 0.0);
  desc.add<double>("drVetoEndcap", 0.0);
  desc.add<double>("etaStripBarrel", 0.0);
  desc.add<double>("etaStripEndcap", 0.0);
  desc.add<double>("energyBarrel", 0.0);
  desc.add<double>("energyEndcap", 0.0);
  descriptions.add(("hltEgammaHLTEcalPFClusterIsolationProducer"), desc);
}

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

  edm::Handle<double> rhoHandle;
  double rho = 0.0;
  if (doRhoCorrection_) {
    iEvent.getByToken(rhoProducer_, rhoHandle);
    rho = *(rhoHandle.product());
  }
  
  if (rho > rhoMax_)
    rho = rhoMax_;
  
  rho = rho*rhoScale_;

  edm::Handle<reco::RecoEcalCandidateCollection> recoecalcandHandle;
  edm::Handle<reco::PFClusterCollection> clusterHandle;

  iEvent.getByToken(recoEcalCandidateProducer_,recoecalcandHandle);
  iEvent.getByToken(pfClusterProducer_, clusterHandle);

  reco::RecoEcalCandidateIsolationMap recoEcalCandMap;
  
  float dRVeto = -1.;
  float etaStrip = -1;
  
  for (unsigned int iReco = 0; iReco < recoecalcandHandle->size(); iReco++) {
    reco::RecoEcalCandidateRef candRef(recoecalcandHandle, iReco);
    
    if (fabs(candRef->eta()) < 1.479) {
      dRVeto = drVetoBarrel_;
      etaStrip = etaStripBarrel_;
    } else {
      dRVeto = drVetoEndcap_;
      etaStrip = etaStripEndcap_;
    }
    
    float sum = 0;
    for (size_t i=0; i<clusterHandle->size(); i++) {
      reco::PFClusterRef pfclu(clusterHandle, i);

      if (fabs(candRef->eta()) < 1.479) {
    if (fabs(pfclu->pt()) < energyBarrel_)
      continue;
      } else {
    if (fabs(pfclu->energy()) < energyEndcap_)
      continue;
      }

      float dEta = fabs(candRef->eta() - pfclu->eta());
      if(dEta < etaStrip) continue;
      
      float dR = deltaR(candRef->eta(), candRef->phi(), pfclu->eta(), pfclu->phi());
      if(dR > drMax_ || dR < dRVeto) continue;
      
      // Exclude clusters that are part of the candidate
      bool isCandCluster = false;
      for (reco::CaloCluster_iterator it = candRef->superCluster()->clustersBegin(); it != candRef->superCluster()->clustersEnd(); ++it) {
    if ((*it)->seed() == pfclu->seed()) {
      isCandCluster = true;
      break;
        }
      }
      if(isCandCluster) continue;
      
      sum += pfclu->pt();
    }
     
    if (doRhoCorrection_) {
      if (fabs(candRef->eta()) < 1.479) 
    sum = sum - rho*effectiveAreaBarrel_;
      else
    sum = sum - rho*effectiveAreaEndcap_;
    }

    recoEcalCandMap.insert(candRef, sum);
  }
  
  std::auto_ptr<reco::RecoEcalCandidateIsolationMap> mapForEvent(new reco::RecoEcalCandidateIsolationMap(recoEcalCandMap));
  iEvent.put(mapForEvent);

}