SCEnergyCorrections.h File Reference

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

Go to the source code of this file.

Functions
reco::CaloClusterPtrVector	CaloClusterVectorCopier (const reco::SuperCluster &sc)
reco::SuperCluster	fBremScCorr (const reco::SuperCluster &sc, const edm::ParameterSet &ps)
reco::SuperCluster	fEAddScCorr (const reco::SuperCluster &sc, double Ecorr)
reco::SuperCluster	fEtaScCorr (const reco::SuperCluster &sc)
reco::SuperCluster	fEtEtaCorr (const reco::SuperCluster &sc, const edm::ParameterSet &ps)

Function Documentation

reco::CaloClusterPtrVector CaloClusterVectorCopier

(

const reco::SuperCluster &

sc

)

Definition at line 104 of file SCEnergyCorrections.h.

References reco::SuperCluster::clustersBegin(), reco::SuperCluster::clustersEnd(), and edm::PtrVector< T >::push_back().

Referenced by fBremScCorr(), fEAddScCorr(), fEtaScCorr(), and fEtEtaCorr().

{
    reco::CaloClusterPtrVector clusters_v;

    for(reco::CaloCluster_iterator cluster = sc.clustersBegin(); cluster != sc.clustersEnd(); cluster ++)
    {
        clusters_v.push_back(*cluster);
    }

    return clusters_v;
}

reco::SuperCluster fBremScCorr	(	const reco::SuperCluster &	sc,
		const edm::ParameterSet &	ps
	)

Definition at line 20 of file SCEnergyCorrections.h.

References a, b, trackerHits::c, CaloClusterVectorCopier(), reco::CaloCluster::energy(), reco::CaloCluster::eta(), reco::SuperCluster::etaWidth(), fEtaScCorr(), edm::ParameterSet::getParameter(), p1, p2, p3, p4, reco::SuperCluster::phiWidth(), reco::CaloCluster::position(), reco::SuperCluster::preshowerEnergy(), reco::SuperCluster::seed(), dtDQMClient_cfg::threshold, and detailsBasic3DVector::y.

Referenced by ErsatzMEt::analyze(), and fEtEtaCorr().

{
    std::vector<double> fBrem = ps.getParameter<std::vector<double> >("fBremVec");
    double bremFrLowThr = ps.getParameter<double>("brLinearLowThr");
    double bremFrHighThr = ps.getParameter<double>("brLinearHighThr");
    
    reco::CaloClusterPtrVector bcs = CaloClusterVectorCopier(sc);       
    double bremFrac = sc.phiWidth()/sc.etaWidth();  
    double newE = sc.energy();
    if(fabs(sc.eta()) < 1.479)
    {
        reco::SuperCluster fEtaSC = fEtaScCorr(sc);
        reco::CaloClusterPtrVector bcs = CaloClusterVectorCopier(sc);       
        newE = fEtaSC.energy();
    }

    if(bremFrac < bremFrLowThr)  bremFrac = bremFrLowThr;
    if(bremFrac < bremFrHighThr)  bremFrac = bremFrHighThr;
    
    double p0 = fBrem[0]; 
    double p1 = fBrem[1]; 
    double p2 = fBrem[2]; 
    double p3 = fBrem[3]; 
    double p4 = fBrem[4]; 
    //
    double threshold = p4; 
      
    double y = p0*threshold*threshold + p1*threshold + p2;
    double yprime = 2*p0*threshold + p1;
    double a = p3;
    double b = yprime - 2*a*threshold;
    double c = y - a*threshold*threshold - b*threshold;
     
    double fCorr = 1;
    if( bremFrac < threshold ) 
        fCorr = p0*bremFrac*bremFrac + p1*bremFrac + p2;
    else 
        fCorr = a*bremFrac*bremFrac + b*bremFrac + c;

    newE /= fCorr;
    reco::SuperCluster corrSc(newE, sc.position(), sc.seed(), bcs, sc.preshowerEnergy(), 0., 0.);
    return corrSc;
}

reco::SuperCluster fEAddScCorr	(	const reco::SuperCluster &	sc,
		double	Ecorr
	)

Definition at line 94 of file SCEnergyCorrections.h.

References CaloClusterVectorCopier(), reco::CaloCluster::position(), reco::SuperCluster::preshowerEnergy(), reco::SuperCluster::rawEnergy(), and reco::SuperCluster::seed().

{
    reco::CaloClusterPtrVector bcs = CaloClusterVectorCopier(sc);       
    
    double newE = sc.rawEnergy()+Ecorr; 
    reco::SuperCluster corrSc(newE, sc.position(), sc.seed(), bcs, sc.preshowerEnergy(), 0., 0.);
    return corrSc;
}

reco::SuperCluster fEtaScCorr

(

const reco::SuperCluster &

sc

)

Definition at line 5 of file SCEnergyCorrections.h.

References CaloClusterVectorCopier(), reco::CaloCluster::eta(), p1, reco::CaloCluster::position(), reco::SuperCluster::preshowerEnergy(), reco::SuperCluster::rawEnergy(), and reco::SuperCluster::seed().

Referenced by ErsatzMEt::analyze(), and fBremScCorr().

{
    reco::CaloClusterPtrVector bcs = CaloClusterVectorCopier(sc);       
    double ieta = fabs(sc.eta())*(5/0.087);
    double p0 = 40.2198;
    double p1 = -3.03103e-6;
    double newE;
//                      std::cout << "Corrected E = Raw E * (1+ p1*(ieta - p0)*(ieta - p0))"<< std::endl;
    if ( ieta < p0 ) newE = sc.rawEnergy();
    else newE = sc.rawEnergy()/(1 + p1*(ieta - p0)*(ieta - p0));

    reco::SuperCluster corrSc(newE, sc.position(), sc.seed(), bcs, sc.preshowerEnergy(), 0., 0.);
    return corrSc;
}

reco::SuperCluster fEtEtaCorr	(	const reco::SuperCluster &	sc,
		const edm::ParameterSet &	ps
	)

Definition at line 64 of file SCEnergyCorrections.h.

References CaloClusterVectorCopier(), reco::CaloCluster::eta(), eta(), fBremScCorr(), edm::ParameterSet::getParameter(), p1, p2, reco::CaloCluster::position(), reco::SuperCluster::preshowerEnergy(), and reco::SuperCluster::seed().

{
  // et -- Et of the SuperCluster (with respect to (0,0,0))
  // eta -- eta of the SuperCluster
    std::vector<double> fEtEtaParams = ps.getParameter<std::vector<double> >("fEtEtaParamsVec");

    reco::SuperCluster fBremSC = fBremScCorr(sc, ps);
    reco::CaloClusterPtrVector bcs = CaloClusterVectorCopier(sc);       

    double eta = sc.eta();
    double et = fBremSC.energy()/cosh(eta);
    double fCorr = 0.;

    double p0 = fEtEtaParams[0] + fEtEtaParams[1]/(et + fEtEtaParams[ 2]) + fEtEtaParams[ 3]/(et*et);
    double p1 = fEtEtaParams[4] + fEtEtaParams[5]/(et + fEtEtaParams[ 6]) + fEtEtaParams[ 7]/(et*et);
    double p2 = fEtEtaParams[8] + fEtEtaParams[9]/(et + fEtEtaParams[10]) + fEtEtaParams[11]/(et*et);

    fCorr = 
    p0 + 
    p1 * atan(fEtEtaParams[12]*(fEtEtaParams[13]-fabs(eta))) + fEtEtaParams[14] * fabs(eta) + 
    p1 * fEtEtaParams[15] * fabs(eta) +
    p2 * fEtEtaParams[16] * eta * eta; 

    if ( fCorr < 0.5 ) fCorr = 0.5;

    double newE = et/(fCorr*cosh(eta));
    reco::SuperCluster corrSc(newE, sc.position(), sc.seed(), bcs, sc.preshowerEnergy(), 0., 0.);
    return corrSc;
}