AntiElectronIDCut2.h

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//--------------------------------------------------------------------------------------------------
// AntiElectronIDCut2
//
// Helper Class for applying simple cut based anti-electron discrimination
//
// Authors: A Nayak
//--------------------------------------------------------------------------------------------------

#ifndef RECOTAUTAG_RECOTAU_AntiElectronIDCut2_H
#define RECOTAUTAG_RECOTAU_AntiElectronIDCut2_H

#include "DataFormats/TauReco/interface/PFTau.h"
#include "DataFormats/TrackReco/interface/Track.h"
#include "DataFormats/TrackReco/interface/TrackFwd.h"
#include "DataFormats/GsfTrackReco/interface/GsfTrack.h"
#include "DataFormats/Math/interface/deltaR.h"

#include <vector>

typedef std::pair<double, double> pdouble;

class AntiElectronIDCut2 
{
  public:

    AntiElectronIDCut2();
    ~AntiElectronIDCut2(); 

    double Discriminator(float TauPt,
                         float TauEta,
                         float TauLeadChargedPFCandPt,
                         float TauLeadChargedPFCandEtaAtEcalEntrance,
                         float TauLeadPFChargedHadrEoP,
                         float TauHcal3x3OverPLead,
                         float TauGammaEtaMom,
                         float TauGammaPhiMom,
                         float TauGammaEnFrac
             );

    double Discriminator(float TauPt,
             float TauEta,
             float TauLeadChargedPFCandPt,
             float TauLeadChargedPFCandEtaAtEcalEntrance,
             float TauLeadPFChargedHadrEoP,
             float TauHcal3x3OverPLead,
             const std::vector<float>& GammasdEta,
             const std::vector<float>& GammasdPhi,
             const std::vector<float>& GammasPt
             );

    template<typename T> 
      double Discriminator(const T& thePFTau)
      {
    float TauLeadChargedPFCandEtaAtEcalEntrance = -99.;
    float TauLeadChargedPFCandPt = -99.;
    const std::vector<reco::PFCandidatePtr>& signalPFCands = thePFTau.signalPFCands();
    for ( std::vector<reco::PFCandidatePtr>::const_iterator pfCandidate = signalPFCands.begin();
          pfCandidate != signalPFCands.end(); ++pfCandidate ) {
      const reco::Track* track = 0;
      if ( (*pfCandidate)->trackRef().isNonnull() ) track = (*pfCandidate)->trackRef().get();
      else if ( (*pfCandidate)->muonRef().isNonnull() && (*pfCandidate)->muonRef()->innerTrack().isNonnull()  ) track = (*pfCandidate)->muonRef()->innerTrack().get();
      else if ( (*pfCandidate)->muonRef().isNonnull() && (*pfCandidate)->muonRef()->globalTrack().isNonnull() ) track = (*pfCandidate)->muonRef()->globalTrack().get();
      else if ( (*pfCandidate)->muonRef().isNonnull() && (*pfCandidate)->muonRef()->outerTrack().isNonnull()  ) track = (*pfCandidate)->muonRef()->outerTrack().get();
      else if ( (*pfCandidate)->gsfTrackRef().isNonnull() ) track = (*pfCandidate)->gsfTrackRef().get();
      if ( track ) {
        if ( track->pt() > TauLeadChargedPFCandPt ) {
          TauLeadChargedPFCandEtaAtEcalEntrance = (*pfCandidate)->positionAtECALEntrance().eta();
          TauLeadChargedPFCandPt = track->pt();
        }
      }
    }
    
    float TauPt = thePFTau.pt();
    float TauEta = thePFTau.eta();
    //float TauLeadPFChargedHadrHoP = 0.;
    float TauLeadPFChargedHadrEoP = 0.;
    if ( thePFTau.leadPFChargedHadrCand()->p() > 0. ) {
      //TauLeadPFChargedHadrHoP = thePFTau.leadPFChargedHadrCand()->hcalEnergy()/thePFTau.leadPFChargedHadrCand()->p();
      TauLeadPFChargedHadrEoP = thePFTau.leadPFChargedHadrCand()->ecalEnergy()/thePFTau.leadPFChargedHadrCand()->p();
    }
    
    std::vector<float> GammasdEta;
    std::vector<float> GammasdPhi;
    std::vector<float> GammasPt;
    for ( unsigned i = 0 ; i < thePFTau.signalPFGammaCands().size(); ++i ) {
      reco::PFCandidatePtr gamma = thePFTau.signalPFGammaCands().at(i);
      if ( thePFTau.leadPFChargedHadrCand().isNonnull() ) {
        GammasdEta.push_back(gamma->eta() - thePFTau.leadPFChargedHadrCand()->eta());
        GammasdPhi.push_back(gamma->phi() - thePFTau.leadPFChargedHadrCand()->phi());
      } else {
        GammasdEta.push_back(gamma->eta() - thePFTau.eta());
        GammasdPhi.push_back(gamma->phi() - thePFTau.phi());
      }
      GammasPt.push_back(gamma->pt());
    }
    
    float TauHcal3x3OverPLead = thePFTau.hcal3x3OverPLead();
    
    return Discriminator(TauPt,
                 TauEta,
                 TauLeadChargedPFCandPt,
                 TauLeadChargedPFCandEtaAtEcalEntrance,
                 TauLeadPFChargedHadrEoP,
                 TauHcal3x3OverPLead,
                 GammasdEta,
                 GammasdPhi,
                 GammasPt
                 );
      };
    
    void SetBarrelCutValues(float TauLeadPFChargedHadrEoP_min,
                float TauLeadPFChargedHadrEoP_max,
                float TauHcal3x3OverPLead_max,
                float TauGammaEtaMom_max,
                float TauGammaPhiMom_max,
                float TauGammaEnFrac_max
                );

    void SetEndcapCutValues(float TauLeadPFChargedHadrEoP_min_1,
                            float TauLeadPFChargedHadrEoP_max_1,
                float TauLeadPFChargedHadrEoP_min_2,
                            float TauLeadPFChargedHadrEoP_max_2,
                            float TauHcal3x3OverPLead_max,
                            float TauGammaEtaMom_max,
                            float TauGammaPhiMom_max,
                            float TauGammaEnFrac_max
                            );
    void ApplyCut_EcalCrack(bool keepAll_, bool rejectAll_){
      keepAllInEcalCrack_ = keepAll_;
      rejectAllInEcalCrack_ = rejectAll_;
    };
    
    void ApplyCuts(bool applyCut_hcal3x3OverPLead, 
           bool applyCut_leadPFChargedHadrEoP, 
           bool applyCut_GammaEtaMom, 
           bool applyCut_GammaPhiMom, 
           bool applyCut_GammaEnFrac, 
           bool applyCut_HLTSpecific
           );

    void SetEcalCracks(const std::vector<pdouble>& etaCracks)
    {
      ecalCracks_.clear();
      for(size_t i = 0; i < etaCracks.size(); i++)
    ecalCracks_.push_back(etaCracks[i]);
    }
    
 private:

    bool isInEcalCrack(double eta) const; 
    
    float TauLeadPFChargedHadrEoP_barrel_min_;
    float TauLeadPFChargedHadrEoP_barrel_max_;
    float TauHcal3x3OverPLead_barrel_max_;
    float TauGammaEtaMom_barrel_max_;
    float TauGammaPhiMom_barrel_max_;
    float TauGammaEnFrac_barrel_max_;
    float TauLeadPFChargedHadrEoP_endcap_min1_;
    float TauLeadPFChargedHadrEoP_endcap_max1_;
    float TauLeadPFChargedHadrEoP_endcap_min2_;
    float TauLeadPFChargedHadrEoP_endcap_max2_;
    float TauHcal3x3OverPLead_endcap_max_;
    float TauGammaEtaMom_endcap_max_;
    float TauGammaPhiMom_endcap_max_;
    float TauGammaEnFrac_endcap_max_;

    bool keepAllInEcalCrack_;
    bool rejectAllInEcalCrack_;

    bool Tau_applyCut_hcal3x3OverPLead_;
    bool Tau_applyCut_leadPFChargedHadrEoP_;
    bool Tau_applyCut_GammaEtaMom_;
    bool Tau_applyCut_GammaPhiMom_;
    bool Tau_applyCut_GammaEnFrac_;
    bool Tau_applyCut_HLTSpecific_;

    std::vector<pdouble> ecalCracks_;
    
    int verbosity_;
};

#endif