PATJetCorrExtractor Class Reference

#include <PATJetCorrExtractor.h>

Public Member Functions
reco::Candidate::LorentzVector	operator() (const pat::Jet rawJet, const reco::JetCorrector *jetCorr, double jetCorrEtaMax=9.9, const reco::Candidate::LorentzVector *const rawJetP4_specified=0) const
reco::Candidate::LorentzVector	operator() (const pat::Jet &jet, const std::string &jetCorrLabel, double jetCorrEtaMax=9.9, const reco::Candidate::LorentzVector *const rawJetP4_specified=0) const

Detailed Description

Retrieve jet energy correction factor for pat::Jets (of either PF-type or Calo-type)

NOTE: this specialization of the "generic" template defined in JetMETCorrections/Type1MET/interface/JetCorrExtractorT.h is to be used for pat::Jets only

Author

Christian Veelken, LLR

Definition at line 52 of file PATJetCorrExtractor.h.

Member Function Documentation

reco::Candidate::LorentzVector PATJetCorrExtractor::operator() ( const pat::Jet  rawJet, const reco::JetCorrector *  jetCorr, double  jetCorrEtaMax = 9.9, const reco::Candidate::LorentzVector *const  rawJetP4_specified = 0  ) const

inline

Definition at line 56 of file PATJetCorrExtractor.h.

  {
     JetCorrExtractorT<pat::Jet> jetCorrExtractor;
     return jetCorrExtractor(rawJet, jetCorr, jetCorrEtaMax, rawJetP4_specified);
  }

reco::Candidate::LorentzVector PATJetCorrExtractor::operator() ( const pat::Jet &  jet, const std::string &  jetCorrLabel, double  jetCorrEtaMax = 9.9, const reco::Candidate::LorentzVector *const  rawJetP4_specified = 0  ) const

inline

Definition at line 64 of file PATJetCorrExtractor.h.

References pat::Jet::availableJECLevels(), pat::Jet::correctedP4(), alignCSCRings::e, edm::hlt::Exception, and format_vstring().

  {
    reco::Candidate::LorentzVector corrJetP4;

    try {
      corrJetP4 = jet.correctedP4(jetCorrLabel);
      if(rawJetP4_specified != nullptr) {
    //MM: compensate for potential removal of constituents (as muons)
    //similar effect in JetMETCorrection/Type1MET/interface/JetCorrExtractor.h
    reco::Candidate::LorentzVector rawJetP4 = jet.correctedP4("Uncorrected");
    double corrFactor = corrJetP4.pt()/rawJetP4.pt();
    corrJetP4 = (*rawJetP4_specified);
    corrJetP4 *= corrFactor;
    if(corrFactor<0) {
      edm::LogWarning("PATJetCorrExtractor") << "Negative jet energy scale correction noticed" << ".\n";
    }
      }
    } catch( cms::Exception e ) {
      throw cms::Exception("InvalidRequest")
    << "The JEC level " << jetCorrLabel << " does not exist !!\n"
    << "Available levels = " << format_vstring(jet.availableJECLevels()) << ".\n";
    }

    return corrJetP4;
  }