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#include <EcalClusterEnergyCorrection.h>
Public Member Functions | |
| EcalClusterEnergyCorrection (const edm::ParameterSet &) | |
| float | fBrem (float e, float eta, int algorithm) const |
| float | fEta (float e, float eta, int algorithm) const |
| float | fEtEta (float et, float eta, int algorithm) const |
| virtual float | getValue (const reco::SuperCluster &, const int mode) const |
| virtual float | getValue (const reco::BasicCluster &, const EcalRecHitCollection &) const |
Function that provides supercluster energy correction due to Bremsstrahlung loss
$Id: EcalClusterEnergyCorrection.h $Date: $Revision:
Definition at line 15 of file EcalClusterEnergyCorrection.h.
| EcalClusterEnergyCorrection::EcalClusterEnergyCorrection | ( | const edm::ParameterSet & | ) | [inline] |
Definition at line 17 of file EcalClusterEnergyCorrection.h.
{};
| float EcalClusterEnergyCorrection::fBrem | ( | float | e, |
| float | eta, | ||
| int | algorithm | ||
| ) | const |
Definition at line 22 of file EcalClusterEnergyCorrection.cc.
References a, b, trackerHits::c, evf::evtn::offset(), p1, p2, p3, p4, EcalFunParams::params(), EcalClusterEnergyCorrectionBaseClass::params_, dtT0WireCalibration_cfg::threshold, and detailsBasic3DVector::y.
Referenced by getValue().
{
// brem == phiWidth/etaWidth of the SuperCluster
// e == energy of the SuperCluster
// first parabola (for br > threshold)
// p0 + p1*x + p2*x^2
// second parabola (for br <= threshold)
// ax^2 + bx + c, make y and y' the same in threshold
// y = p0 + p1*threshold + p2*threshold^2
// yprime = p1 + 2*p2*threshold
// a = p3
// b = yprime - 2*a*threshold
// c = y - a*threshold^2 - b*threshold
int offset;
if ( algorithm == 0 ) offset = 0;
else if ( algorithm == 1 ) offset = 20;
else {
// not supported, produce no correction
return e;
}
//Make No Corrections if brem is invalid!
if ( brem == 0 ) return e;
float bremLowThr = (params_->params())[2 + offset];
float bremHighThr = (params_->params())[3 + offset];
if ( brem < bremLowThr ) brem = bremLowThr;
if ( brem > bremHighThr ) brem = bremHighThr;
// Parameters provided in cfg file
float p0 = (params_->params())[4 + offset];
float p1 = (params_->params())[5 + offset];
float p2 = (params_->params())[6 + offset];
float p3 = (params_->params())[7 + offset];
float p4 = (params_->params())[8 + offset];
//
float threshold = p4;
float y = p0*threshold*threshold + p1*threshold + p2;
float yprime = 2*p0*threshold + p1;
float a = p3;
float b = yprime - 2*a*threshold;
float c = y - a*threshold*threshold - b*threshold;
float fCorr = 1;
if ( brem < threshold )
fCorr = p0*brem*brem + p1*brem + p2;
else
fCorr = a*brem*brem + b*brem + c;
//std::cout << "ECEC fBrem " << e/fCorr << std::endl;
return e/fCorr;
}
| float EcalClusterEnergyCorrection::fEta | ( | float | e, |
| float | eta, | ||
| int | algorithm | ||
| ) | const |
Definition at line 5 of file EcalClusterEnergyCorrection.cc.
References relval_parameters_module::energy, p1, EcalFunParams::params(), and EcalClusterEnergyCorrectionBaseClass::params_.
Referenced by getValue().
{
// this correction is setup only for EB
if ( algorithm != 0 ) return energy;
float ieta = fabs(eta)*(5/0.087);
float p0 = (params_->params())[0]; // should be 40.2198
float p1 = (params_->params())[1]; // should be -3.03103e-6
float correctedEnergy = energy;
if ( ieta < p0 ) correctedEnergy = energy;
else correctedEnergy = energy/(1.0 + p1*(ieta-p0)*(ieta-p0));
//std::cout << "ECEC fEta = " << correctedEnergy << std::endl;
return correctedEnergy;
}
| float EcalClusterEnergyCorrection::fEtEta | ( | float | et, |
| float | eta, | ||
| int | algorithm | ||
| ) | const |
Definition at line 78 of file EcalClusterEnergyCorrection.cc.
References evf::evtn::offset(), p1, p2, p3, EcalFunParams::params(), EcalClusterEnergyCorrectionBaseClass::params_, and mathSSE::sqrt().
Referenced by getValue().
{
// et -- Et of the SuperCluster (with respect to (0,0,0))
// eta -- eta of the SuperCluster
//std::cout << "fEtEta, mode = " << algorithm << std::endl;
//std::cout << "ECEC: p0 " << (params_->params())[9] << " " << (params_->params())[10] << " " << (params_->params())[11] << " " << (params_->params())[12] << std::endl;
//std::cout << "ECEC: p1 " << (params_->params())[13] << " " << (params_->params())[14] << " " << (params_->params())[15] << " " << (params_->params())[16] << std::endl;
//std::cout << "ECEC: fcorr " << (params_->params())[17] << " " << (params_->params())[18] << " " << (params_->params())[19] << std::endl;
float fCorr = 0.;
int offset;
if ( algorithm == 0 ) offset = 0;
else if ( algorithm == 1 ) offset = 20;
else if ( algorithm == 10 ) offset = 28;
else if ( algorithm == 11 ) offset = 39;
else {
// not supported, produce no correction
return et;
}
// Barrel
if ( algorithm == 0 || algorithm == 10 ) {
float p0 = (params_->params())[ 9 + offset] + (params_->params())[10 + offset]/ (et + (params_->params())[11 + offset]) + (params_->params())[12 + offset]/(et*et);
float p1 = (params_->params())[13 + offset] + (params_->params())[14 + offset]/ (et + (params_->params())[15 + offset]) + (params_->params())[16 + offset]/(et*et);
fCorr = p0 + p1 * atan((params_->params())[17 + offset]*((params_->params())[18 + offset]-fabs(eta))) + (params_->params())[19 + offset] * fabs(eta);
} else if ( algorithm == 1 || algorithm == 11 ) { // Endcap
float p0 = (params_->params())[ 9 + offset] + (params_->params())[10 + offset]/sqrt(et);
float p1 = (params_->params())[11 + offset] + (params_->params())[12 + offset]/sqrt(et);
float p2 = (params_->params())[13 + offset] + (params_->params())[14 + offset]/sqrt(et);
float p3 = (params_->params())[15 + offset] + (params_->params())[16 + offset]/sqrt(et);
fCorr = p0 + p1*fabs(eta) + p2*eta*eta + p3/fabs(eta);
}
// cap the correction at 50%
if ( fCorr < 0.5 ) fCorr = 0.5;
if ( fCorr > 1.5 ) fCorr = 1.5;
//std::cout << "ECEC fEtEta " << et/fCorr << std::endl;
return et/fCorr;
}
| float EcalClusterEnergyCorrection::getValue | ( | const reco::SuperCluster & | superCluster, |
| const int | mode | ||
| ) | const [virtual] |
Implements EcalClusterEnergyCorrectionBaseClass.
Definition at line 124 of file EcalClusterEnergyCorrection.cc.
References algorithm(), EcalClusterEnergyCorrectionBaseClass::checkInit(), reco::CaloCluster::energy(), relval_parameters_module::energy, eta(), reco::CaloCluster::eta(), reco::SuperCluster::etaWidth(), fBrem(), fEta(), fEtEta(), reco::SuperCluster::phiWidth(), reco::SuperCluster::preshowerEnergy(), and reco::SuperCluster::rawEnergy().
{
// mode flags:
// hybrid modes: 1 - return f(eta) correction in GeV
// 2 - return f(eta) + f(brem) correction
// 3 - return f(eta) + f(brem) + f(et, eta) correction
// multi5x5: 4 - return f(brem) correction
// 5 - return f(brem) + f(et, eta) correction
// special cases: mode = 10 -- return f(et, eta) correction with respect to already corrected SC in barrel
// mode = 11 -- return f(et, eta) correction with respect to already corrected SC in endcap
checkInit();
float eta = fabs(superCluster.eta());
float brem = superCluster.phiWidth()/superCluster.etaWidth();
int algorithm = -1;
if ( mode <= 3 || mode == 10 ) {
// algorithm: hybrid
algorithm = 0;
float energy = superCluster.rawEnergy();
if ( mode == 10 ) {
algorithm = 10;
energy = superCluster.energy();
}
float correctedEnergy = fEta(energy, eta, algorithm);
if ( mode == 1 ) {
return correctedEnergy - energy;
} else {
// now apply F(brem)
correctedEnergy = fBrem(correctedEnergy, brem, algorithm);
if ( mode == 2 ) {
return correctedEnergy - energy;
}
float correctedEt = correctedEnergy/cosh(eta);
correctedEt = fEtEta(correctedEt, eta, algorithm);
correctedEnergy = correctedEt*cosh(eta);
return correctedEnergy - energy;
}
} else if ( mode == 4 || mode == 5 || mode == 11 ) {
algorithm = 1;
float energy = superCluster.rawEnergy() + superCluster.preshowerEnergy();
if ( mode == 11 ) {
algorithm = 11;
energy = superCluster.energy();
}
float correctedEnergy = fBrem(energy, brem, algorithm);
if ( mode == 4 ) {
return correctedEnergy - energy;
}
float correctedEt = correctedEnergy/cosh(eta);
correctedEt = fEtEta(correctedEt, eta, algorithm);
correctedEnergy = correctedEt*cosh(eta);
return correctedEnergy - energy;
} else {
// perform no correction
return 0;
}
}
| virtual float EcalClusterEnergyCorrection::getValue | ( | const reco::BasicCluster & | , |
| const EcalRecHitCollection & | |||
| ) | const [inline, virtual] |
Implements EcalClusterEnergyCorrectionBaseClass.
Definition at line 20 of file EcalClusterEnergyCorrection.h.
{ return 0.;};
1.7.3