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added cut that each tau has at least one pixel hits (for at least one of... #8095

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Mar 15, 2015
Merged

added cut that each tau has at least one pixel hits (for at least one of... #8095

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23 changes: 23 additions & 0 deletions RecoTauTag/RecoTau/plugins/PFRecoTauDiscriminationByHPSSelection.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,8 @@ class PFRecoTauDiscriminationByHPSSelection : public PFTauDiscriminationProducer

bool requireTauChargedHadronsToBeChargedPFCands_;

int minPixelHits_;

int verbosity_;
};

Expand Down Expand Up @@ -103,6 +105,7 @@ PFRecoTauDiscriminationByHPSSelection::PFRecoTauDiscriminationByHPSSelection(con
));
}
requireTauChargedHadronsToBeChargedPFCands_ = pset.getParameter<bool>("requireTauChargedHadronsToBeChargedPFCands");
minPixelHits_ = pset.getParameter<int>("minPixelHits");
verbosity_ = pset.exists("verbosity") ?
pset.getParameter<int>("verbosity") : 0;
}
Expand Down Expand Up @@ -284,6 +287,26 @@ PFRecoTauDiscriminationByHPSSelection::discriminate(const reco::PFTauRef& tau) c
}
}
}

if ( minPixelHits_ > 0 ) {
int numPixelHits = 0;
const std::vector<reco::PFCandidatePtr>& chargedHadrCands = tau->signalPFChargedHadrCands();
for ( std::vector<reco::PFCandidatePtr>::const_iterator chargedHadrCand = chargedHadrCands.begin();
chargedHadrCand != chargedHadrCands.end(); ++chargedHadrCand ) {
const reco::Track* track = 0;
if ( (*chargedHadrCand)->trackRef().isNonnull() ) track = (*chargedHadrCand)->trackRef().get();
else if ( (*chargedHadrCand)->gsfTrackRef().isNonnull() ) track = (*chargedHadrCand)->gsfTrackRef().get();
if ( track ) {
numPixelHits += track->hitPattern().numberOfValidPixelHits();
}
}
if ( !(numPixelHits >= minPixelHits_) ) {
if ( verbosity_ ) {
edm::LogPrint("PFTauByHPSSelect") << " fails cut on sum of pixel hits." ;
}
return 0.0;
}
}

// Otherwise, we pass!
if ( verbosity_ ) {
Expand Down
4 changes: 3 additions & 1 deletion RecoTauTag/RecoTau/python/PFRecoTauDiscriminationByHPSSelection_cfi.py
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Expand Up @@ -75,7 +75,9 @@
decayMode_2Prong1Pi0,
decayMode_3Prong0Pi0
),
requireTauChargedHadronsToBeChargedPFCands = cms.bool(False)
requireTauChargedHadronsToBeChargedPFCands = cms.bool(False),
# CV: require at least one pixel hit for the sum of all tracks
minPixelHits = cms.int32(1)
)


Expand Down