ConversionTools Class Reference

#include <ConversionTools.h>

Public Member Functions
	ConversionTools ()

Static Public Member Functions
static float	getVtxFitProb (const reco::Conversion *conv)
static bool	hasMatchedConversion (const reco::GsfElectron &ele, const reco::ConversionCollection &convCol, const math::XYZPoint &beamspot, bool allowCkfMatch=true, float lxyMin=2.0, float probMin=1e-6, unsigned int nHitsBeforeVtxMax=0)
static bool	hasMatchedConversion (const reco::TrackRef &trk, const reco::ConversionCollection &convCol, const math::XYZPoint &beamspot, float lxyMin=2.0, float probMin=1e-6, unsigned int nHitsBeforeVtxMax=1)
static bool	hasMatchedConversion (const reco::SuperCluster &sc, const reco::ConversionCollection &convCol, const math::XYZPoint &beamspot, float dRMax=0.1, float dEtaMax=999., float dPhiMax=999., float lxyMin=2.0, float probMin=1e-6, unsigned int nHitsBeforeVtxMax=1)
static bool	hasMatchedPromptElectron (const reco::SuperClusterRef &sc, const reco::GsfElectronCollection &eleCol, const reco::ConversionCollection &convCol, const math::XYZPoint &beamspot, bool allowCkfMatch=true, float lxyMin=2.0, float probMin=1e-6, unsigned int nHitsBeforeVtxMax=0)
static bool	isGoodConversion (const reco::Conversion &conv, const math::XYZPoint &beamspot, float lxyMin=2.0, float probMin=1e-6, unsigned int nHitsBeforeVtxMax=1)
static reco::Conversion const *	matchedConversion (const reco::GsfElectron &ele, const reco::ConversionCollection &convCol, const math::XYZPoint &beamspot, bool allowCkfMatch=true, float lxyMin=2.0, float probMin=1e-6, unsigned int nHitsBeforeVtxMax=0)
static reco::Conversion const *	matchedConversion (const reco::GsfElectronCore &eleCore, const reco::ConversionCollection &convCol, const math::XYZPoint &beamspot, bool allowCkfMatch=true, float lxyMin=2.0, float probMin=1e-6, unsigned int nHitsBeforeVtxMax=0)
static reco::Conversion const *	matchedConversion (const reco::TrackRef &trk, const reco::ConversionCollection &convCol, const math::XYZPoint &beamspot, float lxyMin=2.0, float probMin=1e-6, unsigned int nHitsBeforeVtxMax=1)
static reco::Conversion const *	matchedConversion (const reco::SuperCluster &sc, const reco::ConversionCollection &convCol, const math::XYZPoint &beamspot, float dRMax=0.1, float dEtaMax=999., float dPhiMax=999., float lxyMin=2.0, float probMin=1e-6, unsigned int nHitsBeforeVtxMax=1)
static reco::GsfElectron const *	matchedPromptElectron (const reco::SuperClusterRef &sc, const reco::GsfElectronCollection &eleCol, const reco::ConversionCollection &convCol, const math::XYZPoint &beamspot, bool allowCkfMatch=true, float lxyMin=2.0, float probMin=1e-6, unsigned int nHitsBeforeVtxMax=0)
static bool	matchesConversion (const reco::GsfElectron &ele, const reco::Conversion &conv, bool allowCkfMatch=true, bool allowAmbiguousGsfMatch=false)
static bool	matchesConversion (const reco::GsfElectronCore &eleCore, const reco::Conversion &conv, bool allowCkfMatch=true)
static bool	matchesConversion (const reco::SuperCluster &sc, const reco::Conversion &conv, float dRMax=0.1, float dEtaMax=999., float dPhiMax=999.)
static bool	matchesConversion (const edm::RefToBase< reco::Track > &trk, const reco::Conversion &conv)
static bool	matchesConversion (const reco::TrackRef &trk, const reco::Conversion &conv)
static bool	matchesConversion (const reco::GsfTrackRef &trk, const reco::Conversion &conv)

Detailed Description

Definition at line 35 of file ConversionTools.h.

Constructor & Destructor Documentation

ConversionTools::ConversionTools ( )

inline

Definition at line 38 of file ConversionTools.h.

References conv, photonValidator_cfi::dEtaMax, CSCSegmentAlgorithmRU_cfi::dPhiMax, allElectronIsolations_cfi::dRMax, MillePedeFileConverter_cfg::e, getVtxFitProb(), hasMatchedConversion(), hasMatchedPromptElectron(), isGoodConversion(), matchedConversion(), matchedPromptElectron(), matchesConversion(), and SimDataFormats::CaloAnalysis::sc.

{}

Member Function Documentation

float ConversionTools::getVtxFitProb ( const reco::Conversion *  conv )

static

Definition at line 384 of file ConversionTools.cc.

References reco::Vertex::chi2(), reco::Conversion::conversionVertex(), reco::Vertex::isValid(), reco::Vertex::ndof(), and badGlobalMuonTaggersAOD_cff::vtx.

Referenced by ConversionTools(), GsfElectronAlgo::createElectron(), and EG9X105XObjectUpdateModifier::modifyObject().

{
  if (conv!=nullptr) {
    const reco::Vertex& vtx = conv->conversionVertex();
    if( vtx.isValid() ) {
      return TMath::Prob(vtx.chi2(),vtx.ndof()) ;
    } 
  }
  return -1;
}

bool ConversionTools::hasMatchedConversion ( const reco::GsfElectron &  ele, const reco::ConversionCollection &  convCol, const math::XYZPoint &  beamspot, bool  allowCkfMatch = true, float  lxyMin = 2.0, float  probMin = 1e-6, unsigned int  nHitsBeforeVtxMax = 0  )

static

Definition at line 168 of file ConversionTools.cc.

Referenced by ConversionTools(), AdHocNTupler::fill(), LeptonSkimming::filter(), DQMExample_Step1::MediumEle(), GsfEleConversionVetoCut::operator()(), ElectronIdentifier::passID(), SoftPFElectronTagInfoProducer::produce(), pat::PATElectronProducer::produce(), EgammaCutBasedEleId::TestWP(), and GsfEleConversionVetoCut::value().

{
  //check if a given electron candidate matches to at least one conversion candidate in the
  //collection which also passes the selection cuts, optionally match with the closestckf track in
  //in addition to just the gsf track (enabled in default arguments)
  
  for(auto const& it : convCol) {
    if (!matchesConversion(ele, it, allowCkfMatch)) continue;
    if (!isGoodConversion(it,beamspot,lxyMin,probMin,nHitsBeforeVtxMax)) continue;
   
    return true;
  }
  
  return false;
  
}

bool ConversionTools::hasMatchedConversion ( const reco::TrackRef &  trk, const reco::ConversionCollection &  convCol, const math::XYZPoint &  beamspot, float  lxyMin = 2.0, float  probMin = 1e-6, unsigned int  nHitsBeforeVtxMax = 1  )

static

Definition at line 188 of file ConversionTools.cc.

References edm::Ref< C, T, F >::isNull().

{
  //check if a given track matches to at least one conversion candidate in the
  //collection which also passes the selection cuts
  
  if (trk.isNull()) return false;
  
  for(auto const& it : convCol) {
    if (!matchesConversion(trk, it)) continue;
    if (!isGoodConversion(it,beamspot,lxyMin,probMin,nHitsBeforeVtxMax)) continue;
   
    return true;
  }
  
  return false;
  
}

bool ConversionTools::hasMatchedConversion ( const reco::SuperCluster &  sc, const reco::ConversionCollection &  convCol, const math::XYZPoint &  beamspot, float  dRMax = 0.1, float  dEtaMax = 999., float  dPhiMax = 999., float  lxyMin = 2.0, float  probMin = 1e-6, unsigned int  nHitsBeforeVtxMax = 1  )

static

Definition at line 209 of file ConversionTools.cc.

{
  
  //check if a given SuperCluster matches to at least one conversion candidate in the
  //collection which also passes the selection cuts

  for(auto const& it : convCol) {
    if (!matchesConversion(sc, it)) continue;
    if (!isGoodConversion(it,beamspot,lxyMin,probMin,nHitsBeforeVtxMax)) continue;
   
    return true;
  }
  
  return false;

}

bool ConversionTools::hasMatchedPromptElectron ( const reco::SuperClusterRef &  sc, const reco::GsfElectronCollection &  eleCol, const reco::ConversionCollection &  convCol, const math::XYZPoint &  beamspot, bool  allowCkfMatch = true, float  lxyMin = 2.0, float  probMin = 1e-6, unsigned int  nHitsBeforeVtxMax = 0  )

static

Definition at line 343 of file ConversionTools.cc.

Referenced by ConversionTools(), AdHocNTupler::fill(), and pat::PATPhotonProducer::produce().

{

  return !(matchedPromptElectron(sc, eleCol, convCol, beamspot,
              allowCkfMatch, lxyMin, probMin, nHitsBeforeVtxMax) == nullptr);
}

bool ConversionTools::isGoodConversion ( const reco::Conversion &  conv, const math::XYZPoint &  beamspot, float  lxyMin = 2.0, float  probMin = 1e-6, unsigned int  nHitsBeforeVtxMax = 1  )

static

Definition at line 17 of file ConversionTools.cc.

References reco::Vertex::chi2(), reco::Conversion::conversionVertex(), reco::Vertex::isValid(), reco::Vertex::ndof(), reco::Conversion::nHitsBeforeVtx(), reco::Conversion::refittedPairMomentum(), badGlobalMuonTaggersAOD_cff::vtx, reco::Vertex::x(), and reco::Vertex::y().

Referenced by ConversionTools().

{
  
  //Check if a given conversion candidate passes the conversion selection cuts
  
  const reco::Vertex &vtx = conv.conversionVertex();

  //vertex validity
  if (!vtx.isValid()) return false;

  //fit probability
  if (TMath::Prob( vtx.chi2(),  vtx.ndof() )<probMin) return false;

  //compute transverse decay length
  math::XYZVector mom(conv.refittedPairMomentum()); 
  double dbsx = vtx.x() - beamspot.x();
  double dbsy = vtx.y() - beamspot.y();
  double lxy = (mom.x()*dbsx + mom.y()*dbsy)/mom.rho();

  //transverse decay length  
  if ( lxy<lxyMin )
    return false;
    
  //loop through daughters to check nhitsbeforevtx
  for (std::vector<uint8_t>::const_iterator it = conv.nHitsBeforeVtx().begin(); it!=conv.nHitsBeforeVtx().end(); ++it) {
    if ( (*it)>nHitsBeforeVtxMax ) return false;
  }
  
  return true;
}

reco::Conversion const * ConversionTools::matchedConversion ( const reco::GsfElectron &  ele, const reco::ConversionCollection &  convCol, const math::XYZPoint &  beamspot, bool  allowCkfMatch = true, float  lxyMin = 2.0, float  probMin = 1e-6, unsigned int  nHitsBeforeVtxMax = 0  )

static

Definition at line 230 of file ConversionTools.cc.

References edm::match().

Referenced by ElectronConversionRejectionValidator::analyze(), ConversionTools(), GsfElectronAlgo::createElectron(), and EG9X105XObjectUpdateModifier::modifyObject().

{
  //check if a given electron candidate matches to at least one conversion candidate in the
  //collection which also passes the selection cuts, optionally match with the closestckf track in
  //in addition to just the gsf track (enabled in default arguments)
  //If multiple conversions are found, returned reference corresponds to minimum
  //conversion radius
  
  reco::Conversion const* match = nullptr;
  
  double minRho = 999.;
  for(auto const& it : convCol) {
    float rho = it.conversionVertex().position().rho();
    if (rho>minRho) continue;
    if (!matchesConversion(ele, it, allowCkfMatch)) continue;
    if (!isGoodConversion(it,beamspot,lxyMin,probMin,nHitsBeforeVtxMax)) continue;
   
    minRho = rho;
    match = ⁢
  }
  
  return match;
  
}

reco::Conversion const * ConversionTools::matchedConversion ( const reco::GsfElectronCore &  eleCore, const reco::ConversionCollection &  convCol, const math::XYZPoint &  beamspot, bool  allowCkfMatch = true, float  lxyMin = 2.0, float  probMin = 1e-6, unsigned int  nHitsBeforeVtxMax = 0  )

static

Definition at line 258 of file ConversionTools.cc.

References edm::match().

{
  //check if a given electron candidate matches to at least one conversion candidate in the
  //collection which also passes the selection cuts, optionally match with the closestckf track in
  //in addition to just the gsf track (enabled in default arguments)
  //If multiple conversions are found, returned reference corresponds to minimum
  //conversion radius
  
  reco::Conversion const* match = nullptr;
  
  double minRho = 999.;
  for(auto const& it : convCol) {
    float rho = it.conversionVertex().position().rho();
    if (rho>minRho) continue;
    if (!matchesConversion(eleCore, it, allowCkfMatch)) continue;
    if (!isGoodConversion(it,beamspot,lxyMin,probMin,nHitsBeforeVtxMax)) continue;
   
    minRho = rho;
    match = ⁢
  }
  
  return match;
  
}

reco::Conversion const * ConversionTools::matchedConversion ( const reco::TrackRef &  trk, const reco::ConversionCollection &  convCol, const math::XYZPoint &  beamspot, float  lxyMin = 2.0, float  probMin = 1e-6, unsigned int  nHitsBeforeVtxMax = 1  )

static

Definition at line 286 of file ConversionTools.cc.

References edm::Ref< C, T, F >::isNull(), and edm::match().

{
  //check if a given track matches to at least one conversion candidate in the
  //collection which also passes the selection cuts
  //If multiple conversions are found, returned reference corresponds to minimum
  //conversion radius
  
  reco::Conversion const* match = nullptr;

  if (trk.isNull()) return match;
  
  double minRho = 999.;
  for(auto const& it : convCol) {
    float rho = it.conversionVertex().position().rho();
    if (rho>minRho) continue;
    if (!matchesConversion(trk, it)) continue;
    if (!isGoodConversion(it,beamspot,lxyMin,probMin,nHitsBeforeVtxMax)) continue;
   
    minRho = rho;
    match = ⁢
  }
  
  return match;
  
}

reco::Conversion const * ConversionTools::matchedConversion ( const reco::SuperCluster &  sc, const reco::ConversionCollection &  convCol, const math::XYZPoint &  beamspot, float  dRMax = 0.1, float  dEtaMax = 999., float  dPhiMax = 999., float  lxyMin = 2.0, float  probMin = 1e-6, unsigned int  nHitsBeforeVtxMax = 1  )

static

Definition at line 315 of file ConversionTools.cc.

References edm::match().

{

  //check if a given SuperCluster matches to at least one conversion candidate in the
  //collection which also passes the selection cuts
  //If multiple conversions are found, returned reference corresponds to minimum
  //conversion radius

  reco::Conversion const* match = nullptr;
  
  double minRho = 999.;
  for(auto const& it : convCol) {
    float rho = it.conversionVertex().position().rho();
    if (rho>minRho) continue;
    if (!matchesConversion(sc, it, dRMax,dEtaMax,dPhiMax)) continue;
    if (!isGoodConversion(it,beamspot,lxyMin,probMin,nHitsBeforeVtxMax)) continue;
   
    minRho = rho;
    match = ⁢
  }
  
  return match;

}

reco::GsfElectron const * ConversionTools::matchedPromptElectron ( const reco::SuperClusterRef &  sc, const reco::GsfElectronCollection &  eleCol, const reco::ConversionCollection &  convCol, const math::XYZPoint &  beamspot, bool  allowCkfMatch = true, float  lxyMin = 2.0, float  probMin = 1e-6, unsigned int  nHitsBeforeVtxMax = 0  )

static

Definition at line 353 of file ConversionTools.cc.

References edm::Ref< C, T, F >::isNull(), edm::match(), reco::HitPattern::MISSING_INNER_HITS, and SimDataFormats::CaloAnalysis::sc.

Referenced by ConversionTools().

{

  //check if a given SuperCluster matches to at least one GsfElectron having zero expected inner hits
  //and not matching any conversion in the collection passing the quality cuts

  reco::GsfElectron const* match = nullptr;

  if (sc.isNull()) return match;
  
  for(auto const& it : eleCol) {
    //match electron to supercluster
    if (it.superCluster()!=sc) continue;

    //check expected inner hits
    if (it.gsfTrack()->hitPattern().numberOfLostHits(reco::HitPattern::MISSING_INNER_HITS) > 0) continue;

    //check if electron is matching to a conversion
    if (hasMatchedConversion(it,convCol,beamspot,allowCkfMatch,lxyMin,probMin,nHitsBeforeVtxMax)) continue;
   
   
    match = ⁢
  }
  
  return match;


}

bool ConversionTools::matchesConversion ( const reco::GsfElectron &  ele, const reco::Conversion &  conv, bool  allowCkfMatch = true, bool  allowAmbiguousGsfMatch = false  )

static

Definition at line 49 of file ConversionTools.cc.

References reco::GsfElectron::ambiguousGsfTracksBegin(), reco::GsfElectron::ambiguousGsfTracksEnd(), and reco::Conversion::tracks().

Referenced by PF_PU_AssoMapAlgos::ComesFromConversion(), ConversionTools(), ReducedEGProducer::linkConversionsByTrackRef(), and pat::PATConversionProducer::produce().

{

  //check if a given GsfElectron matches a given conversion (no quality cuts applied)
  //matching is always attempted through the gsf track ref, and optionally attempted through the
  //closest ctf track ref

  const std::vector<edm::RefToBase<reco::Track> > &convTracks = conv.tracks();
  for (std::vector<edm::RefToBase<reco::Track> >::const_iterator it=convTracks.begin(); it!=convTracks.end(); ++it) {
    if ( ele.reco::GsfElectron::gsfTrack().isNonnull() && ele.reco::GsfElectron::gsfTrack().id()==it->id() && ele.reco::GsfElectron::gsfTrack().key()==it->key()) return true;
    else if ( allowCkfMatch && ele.reco::GsfElectron::closestCtfTrackRef().isNonnull() && ele.reco::GsfElectron::closestCtfTrackRef().id()==it->id() && ele.reco::GsfElectron::closestCtfTrackRef().key()==it->key() ) return true;
    if (allowAmbiguousGsfMatch) {
      for (reco::GsfTrackRefVector::const_iterator tk = ele.ambiguousGsfTracksBegin(); tk!=ele.ambiguousGsfTracksEnd(); ++tk) {
        if (tk->isNonnull() && tk->id()==it->id() && tk->key()==it->key()) return true;
      }
    }
  }

  return false;
}

bool ConversionTools::matchesConversion ( const reco::GsfElectronCore &  eleCore, const reco::Conversion &  conv, bool  allowCkfMatch = true  )

static

Definition at line 71 of file ConversionTools.cc.

References reco::GsfElectronCore::ctfTrack(), reco::GsfElectronCore::gsfTrack(), edm::ProductID::id(), edm::Ref< C, T, F >::id(), edm::Ref< C, T, F >::isNonnull(), edm::Ref< C, T, F >::key(), and reco::Conversion::tracks().

{

  //check if a given GsfElectronCore matches a given conversion (no quality cuts applied)
  //matching is always attempted through the gsf track ref, and optionally attempted through the
  //closest ctf track ref

  for (const auto& trkRef : conv.tracks() ){
    if ( eleCore.gsfTrack().isNonnull() && eleCore.gsfTrack().id()==trkRef.id() &&
     eleCore.gsfTrack().key()==trkRef.key()) return true;
    else if ( allowCkfMatch && eleCore.ctfTrack().isNonnull() &&
          eleCore.ctfTrack().id()==trkRef.id() &&
          eleCore.ctfTrack().key()==trkRef.key() ) return true;
  }

  return false;
}

bool ConversionTools::matchesConversion ( const reco::SuperCluster &  sc, const reco::Conversion &  conv, float  dRMax = 0.1, float  dEtaMax = 999., float  dPhiMax = 999.  )

static

Definition at line 91 of file ConversionTools.cc.

References reco::Conversion::conversionVertex(), reco::deltaPhi(), reco::deltaR(), particleFlow_cfi::dEta, particleFlow_cfi::dPhi, PFRecoTauDiscriminationAgainstElectronDeadECAL_cfi::dR, reco::Vertex::position(), reco::CaloCluster::position(), and reco::Conversion::refittedPairMomentum().

                                                                                                                                         {

  //check if a given SuperCluster matches a given conversion (no quality cuts applied)
  //matching is geometric between conversion momentum and vector joining conversion vertex
  //to supercluster position


  math::XYZVector mom(conv.refittedPairMomentum());
  
  const math::XYZPoint& scpos(sc.position());
  math::XYZPoint cvtx(conv.conversionVertex().position());


  math::XYZVector cscvector = scpos - cvtx;
  float dR = reco::deltaR(mom,cscvector);
  float dEta = mom.eta() - cscvector.eta();
  float dPhi = reco::deltaPhi(mom.phi(),cscvector.phi());

  if (dR>dRMax) return false;
  if (dEta>dEtaMax) return false;
  if (dPhi>dPhiMax) return false;

  return true;

}

bool ConversionTools::matchesConversion ( const edm::RefToBase< reco::Track > &  trk, const reco::Conversion &  conv  )

static

Definition at line 119 of file ConversionTools.cc.

References edm::ProductID::id(), edm::RefToBase< T >::id(), edm::RefToBase< T >::isNull(), edm::RefToBase< T >::key(), and reco::Conversion::tracks().

{

  //check if given track matches given conversion (matching by ref)

  if (trk.isNull()) return false;

  const std::vector<edm::RefToBase<reco::Track> > &convTracks = conv.tracks();
  for (std::vector<edm::RefToBase<reco::Track> >::const_iterator it=convTracks.begin(); it!=convTracks.end(); ++it) {
    if (trk.id()==it->id() && trk.key()==it->key()) return true;
  }

  return false;
}

bool ConversionTools::matchesConversion ( const reco::TrackRef &  trk, const reco::Conversion &  conv  )

static

Definition at line 135 of file ConversionTools.cc.

References edm::ProductID::id(), edm::Ref< C, T, F >::id(), edm::Ref< C, T, F >::isNull(), edm::Ref< C, T, F >::key(), and reco::Conversion::tracks().

{

  //check if given track matches given conversion (matching by ref)

  if (trk.isNull()) return false;

  const std::vector<edm::RefToBase<reco::Track> > &convTracks = conv.tracks();
  for (std::vector<edm::RefToBase<reco::Track> >::const_iterator it=convTracks.begin(); it!=convTracks.end(); ++it) {
    if (trk.id()==it->id() && trk.key()==it->key()) return true;
  }

  return false;
}

bool ConversionTools::matchesConversion ( const reco::GsfTrackRef &  trk, const reco::Conversion &  conv  )

static

Definition at line 151 of file ConversionTools.cc.

References edm::ProductID::id(), edm::Ref< C, T, F >::id(), edm::Ref< C, T, F >::isNull(), edm::Ref< C, T, F >::key(), and reco::Conversion::tracks().

{

  //check if given track matches given conversion (matching by ref)

  if (trk.isNull()) return false;

  const std::vector<edm::RefToBase<reco::Track> > &convTracks = conv.tracks();
  for (std::vector<edm::RefToBase<reco::Track> >::const_iterator it=convTracks.begin(); it!=convTracks.end(); ++it) {
    if (trk.id()==it->id() && trk.key()==it->key()) return true;
  }

  return false;
}