#include <PFEnergyResolution.h>

Public Member Functions
double	getEnergyResolutionEm (double CorrectedEnergy, double eta) const

double	getEnergyResolutionHad (double energyHCAL, double eta, double phi) const

	PFEnergyResolution ()

	~PFEnergyResolution ()

Detailed Description

Definition at line 30 of file PFEnergyResolution.h.

Constructor & Destructor Documentation

◆ PFEnergyResolution()

PFEnergyResolution::PFEnergyResolution ( )

Definition at line 10 of file PFEnergyResolution.cc.

                                        {
   //--- nothing to be done yet
 }

◆ ~PFEnergyResolution()

PFEnergyResolution::~PFEnergyResolution ( )

Definition at line 14 of file PFEnergyResolution.cc.

                                         {
   //--- nothing to be done yet
 }

Member Function Documentation

◆ getEnergyResolutionEm()

double PFEnergyResolution::getEnergyResolutionEm	(	double	CorrectedEnergy,
		double	eta
	)		const

Definition at line 18 of file PFEnergyResolution.cc.

                                                                                          {
   //The parameters S,N,C has been determined with the Full Sim on CMSSW_2_1_0_pre4.
   //The resolution must be a function of the corrected energy available in PFEnergyCalibration
   //Jonathan Biteau July 2008
  
   double C;
   double S;
   double N;
   if (TMath::Abs(eta) < 1.48) {
     C = 0.35 / 100;
     S = 5.51 / 100;
     N = 98. / 1000.;
   } else {
     C = 0;
     S = 12.8 / 100;
     N = 440. / 1000.;
   }
   double result = TMath::Sqrt(C * C * CorrectedEnergy * CorrectedEnergy + S * S * CorrectedEnergy + N * N);
   return result;
 }

References Abs(), gen::C, PVValHelper::eta, N, mps_fire::result, and S().

◆ getEnergyResolutionHad()

double PFEnergyResolution::getEnergyResolutionHad	(	double	energyHCAL,
		double	eta,
		double	phi
	)		const

Definition at line 39 of file PFEnergyResolution.cc.

                                                                                                  {
   //--- estimate **relative** resolution of energy measurement (sigmaE/E)
   //    for hadrons in depositing energy in HCAL
   //    (eta and phi dependence not implemented yet)
  
   return 1.49356 / sqrt(energyHCAL) + 6.62527e-03 * sqrt(energyHCAL) - 6.33966e-02;
 }

References spr::energyHCAL(), and mathSSE::sqrt().