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Functions

/data/refman/pasoursint/CMSSW_5_3_0/src/ElectroWeakAnalysis/ZEE/interface/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 
)
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(), eta(), reco::CaloCluster::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;
}