EcalClusterIsoCalculator Class Reference

#include <EcalClusterIsoCalculator.h>

Public Member Functions
	EcalClusterIsoCalculator (const edm::Event &iEvent, const edm::EventSetup &iSetup, const edm::Handle< reco::BasicClusterCollection > barrel, const edm::Handle< reco::BasicClusterCollection > endcap)
double	getBkgSubEcalClusterIso (const reco::SuperClusterRef clus, const double radius, const double threshold)
	Return the background-subtracted ecal cluster energy in a cone around the SC. More...
double	getEcalClusterIso (const reco::SuperClusterRef clus, const double radius, const double threshold)
	Return the ecal cluster energy in a cone around the SC. More...

Private Attributes
const reco::BasicClusterCollection *	fEBclusters_
const reco::BasicClusterCollection *	fEEclusters_
const CaloGeometry *	geometry_

Detailed Description

Definition at line 18 of file EcalClusterIsoCalculator.h.

Constructor & Destructor Documentation

EcalClusterIsoCalculator::EcalClusterIsoCalculator	(	const edm::Event &	iEvent,
		const edm::EventSetup &	iSetup,
		const edm::Handle< reco::BasicClusterCollection >	barrel,
		const edm::Handle< reco::BasicClusterCollection >	endcap
	)

Definition at line 20 of file EcalClusterIsoCalculator.cc.

References edm::EventSetup::get(), edm::ESHandleBase::isValid(), edm::HandleBase::isValid(), edm::Handle< T >::product(), and edm::ESHandle< T >::product().

{
  if(pEBclusters.isValid())
     fEBclusters_ = pEBclusters.product();
   else
     fEBclusters_ = nullptr;

   if(pEEclusters.isValid())
     fEEclusters_ = pEEclusters.product();
   else
     fEEclusters_ = nullptr;

   ESHandle<CaloGeometry> geometryHandle;
   iSetup.get<CaloGeometryRecord>().get(geometryHandle);
   if(geometryHandle.isValid())
     geometry_ = geometryHandle.product();
   else
     geometry_ = nullptr;
}

Member Function Documentation

double EcalClusterIsoCalculator::getBkgSubEcalClusterIso	(	const reco::SuperClusterRef	clus,
		const double	radius,
		const double	threshold
	)

Return the background-subtracted ecal cluster energy in a cone around the SC.

Definition at line 93 of file EcalClusterIsoCalculator.cc.

References particleFlow_cfi::dEta, stringResolutionProvider_cfi::et, and PVValHelper::eta.

Referenced by photonIsolationHIProducer::produce().

{
   if(!fEBclusters_) {
      return -100;
   }

   if(!fEEclusters_) {
      return -100;
   }

   double SClusterEta = cluster->eta();
   double TotalEt = 0;

   TotalEt = - cluster->rawEnergy()/cosh(cluster->eta());

   for(BasicClusterCollection::const_iterator iclu = fEBclusters_->begin();
       iclu != fEBclusters_->end(); ++iclu) {
      const BasicCluster *clu = &(*iclu);
      math::XYZVector ClusPoint(clu->x(),clu->y(),clu->z());
      double eta = ClusPoint.eta();

      double dEta = fabs(eta-SClusterEta);

     if (dEta<x*0.1) {
         double et = clu->energy()/cosh(eta);
         if (et<threshold) et=0;
         TotalEt += et;
      }
   }

   for(BasicClusterCollection::const_iterator iclu = fEEclusters_->begin();
       iclu != fEEclusters_->end(); ++iclu) {
      const BasicCluster *clu = &(*iclu);
      math::XYZVector ClusPoint(clu->x(),clu->y(),clu->z());
      double eta = ClusPoint.eta();
      double dEta = fabs(eta-SClusterEta);

      if (dEta<x*0.1) {
         double et = clu->energy()/cosh(eta);
         if (et<threshold) et=0;
         TotalEt += et;
      }
   }

   double Cx = getEcalClusterIso(cluster,x,threshold);
   double CCx = (Cx - TotalEt / 40.0 * x) * (1/(1-x/40.));

   return CCx;
}

double EcalClusterIsoCalculator::getEcalClusterIso	(	const reco::SuperClusterRef	clus,
		const double	radius,
		const double	threshold
	)

Return the ecal cluster energy in a cone around the SC.

Definition at line 40 of file EcalClusterIsoCalculator.cc.

References reco::deltaR2(), stringResolutionProvider_cfi::et, and PVValHelper::eta.

{
   if(!fEBclusters_) {
      return -100;
   }

   if(!fEEclusters_) {
      return -100;
   }

   math::XYZVector SClusPoint(cluster->position().x(),
                          cluster->position().y(),
                          cluster->position().z());

   double TotalEt = 0;

   TotalEt = - cluster->rawEnergy()/cosh(cluster->eta());

   // Loop over barrel basic clusters
   for(BasicClusterCollection::const_iterator iclu = fEBclusters_->begin();
       iclu != fEBclusters_->end(); ++iclu) {
      const BasicCluster *clu = &(*iclu);
      math::XYZVector ClusPoint(clu->x(),clu->y(),clu->z());
      double eta = ClusPoint.eta();

      double dR2 = reco::deltaR2(*clu, *cluster);

      if (dR2 < (x*x*0.01)) {
         double et = clu->energy()/cosh(eta);
         if (et<threshold) et=0;
         TotalEt += et;
      }
   }

   for(BasicClusterCollection::const_iterator iclu = fEEclusters_->begin();
       iclu != fEEclusters_->end(); ++iclu) {
      const BasicCluster *clu = &(*iclu);
      const GlobalPoint clusPoint(clu->x(),clu->y(),clu->z());
      math::XYZVector ClusPoint(clu->x(),clu->y(),clu->z());
      double eta = ClusPoint.eta();

      double dR2 = reco::deltaR2(*clu, *cluster);

      if (dR2 < (x*x*0.01)) {
         double et = clu->energy()/cosh(eta);
         if (et<threshold) et=0;
         TotalEt += et;
      }
   }

   return TotalEt;
}

Member Data Documentation

const reco::BasicClusterCollection* EcalClusterIsoCalculator::fEBclusters_

private

Definition at line 31 of file EcalClusterIsoCalculator.h.

const reco::BasicClusterCollection* EcalClusterIsoCalculator::fEEclusters_

private

Definition at line 32 of file EcalClusterIsoCalculator.h.

const CaloGeometry* EcalClusterIsoCalculator::geometry_

private

Definition at line 33 of file EcalClusterIsoCalculator.h.