ElectronSqPtTkIsolation Class Reference

#include <ElectronSqPtTkIsolation.h>

Public Member Functions
	ElectronSqPtTkIsolation (double extRadius, double intRadius, double ptLow, double lip, const reco::TrackCollection *)
int	getNumberTracks (const reco::GsfElectron *) const
double	getPtTracks (const reco::GsfElectron *) const
	~ElectronSqPtTkIsolation ()

Private Member Functions
std::pair< int, double >	getIso (const reco::GsfElectron *) const

Private Attributes
double	extRadius_
double	intRadius_
double	lip_
double	ptLow_
const reco::TrackCollection *	trackCollection_

Detailed Description

Definition at line 16 of file ElectronSqPtTkIsolation.h.

Constructor & Destructor Documentation

ElectronSqPtTkIsolation::ElectronSqPtTkIsolation	(	double	extRadius,
		double	intRadius,
		double	ptLow,
		double	lip,
		const reco::TrackCollection *	trackCollection
	)

Definition at line 19 of file ElectronSqPtTkIsolation.cc.

    : extRadius_(extRadius), intRadius_(intRadius), ptLow_(ptLow), lip_(lip), trackCollection_(trackCollection) {}

ElectronSqPtTkIsolation::~ElectronSqPtTkIsolation

(

)

Definition at line 23 of file ElectronSqPtTkIsolation.cc.

{}

Member Function Documentation

std::pair< int, double > ElectronSqPtTkIsolation::getIso ( const reco::GsfElectron *  electron ) const

private

Definition at line 26 of file ElectronSqPtTkIsolation.cc.

References counter, electronAnalyzer_cfi::DeltaR, flavorHistoryFilter_cfi::dr, extRadius_, reco::GsfElectron::gsfTrack(), intRadius_, lip_, and ptLow_.

Referenced by getNumberTracks(), and getPtTracks().

                                                                                          {
  int counter = 0;
  double ptSum = 0.;
  //Take the electron track
  reco::GsfTrackRef tmpTrack = electron->gsfTrack();
  math::XYZVector tmpElectronMomentumAtVtx = (*tmpTrack).momentum();

  for (reco::TrackCollection::const_iterator itrTr = (*trackCollection_).begin(); itrTr != (*trackCollection_).end();
       ++itrTr) {
    math::XYZVector tmpTrackMomentumAtVtx = (*itrTr).momentum();
    double this_pt = (*itrTr).pt();
    if (this_pt < ptLow_)
      continue;
    if (fabs((*itrTr).dz() - (*tmpTrack).dz()) > lip_)
      continue;
    double dr = DeltaR(tmpTrackMomentumAtVtx, tmpElectronMomentumAtVtx);
    if (fabs(dr) < extRadius_ && fabs(dr) >= intRadius_) {
      ++counter;
      ptSum += this_pt * this_pt;  // sum of squared pT
    }
  }  //end loop over tracks

  std::pair<int, double> retval;
  retval.first = counter;
  retval.second = ptSum;

  return retval;
}

int ElectronSqPtTkIsolation::getNumberTracks

(

const reco::GsfElectron *

electron

)

const

Definition at line 55 of file ElectronSqPtTkIsolation.cc.

References getIso().

                                                                                  {
  //counter for the tracks in the isolation cone
  return getIso(electron).first;
}

double ElectronSqPtTkIsolation::getPtTracks

(

const reco::GsfElectron *

electron

)

const

Definition at line 60 of file ElectronSqPtTkIsolation.cc.

References getIso().

Referenced by ElectronSqPtTkIsolationProducer::produce().

{ return getIso(electron).second; }

Member Data Documentation

double ElectronSqPtTkIsolation::extRadius_

private

Definition at line 29 of file ElectronSqPtTkIsolation.h.

Referenced by getIso().

double ElectronSqPtTkIsolation::intRadius_

private

Definition at line 30 of file ElectronSqPtTkIsolation.h.

Referenced by getIso().

double ElectronSqPtTkIsolation::lip_

private

Definition at line 32 of file ElectronSqPtTkIsolation.h.

Referenced by getIso().

double ElectronSqPtTkIsolation::ptLow_

private

Definition at line 31 of file ElectronSqPtTkIsolation.h.

Referenced by getIso().

const reco::TrackCollection* ElectronSqPtTkIsolation::trackCollection_

private

Definition at line 34 of file ElectronSqPtTkIsolation.h.