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#ifndef PatAlgos_PATPrimaryVertexSelector_H_
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#define PatAlgos_PATPrimaryVertexSelector_H_
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/**
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\class pat::PATPrimaryVertexSelector PATPrimaryVertexSelector.h "PhysicsTools/PatAlgos/interface/PATPrimaryVertexSelector.h"
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The PATPrimaryVertexSelector is used together with an ObjectSelector to clean and
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sort a collection of primary vertices. The code is very close to what is done in
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SusyAnalyzer: it allows a selection based on the (normalized) chi2 of the vertex fit,
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the position, the multiplicity and the pt-sum of the associated tracks. The tracks
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entering in the calculation of the last two quantities can be restricted in eta.
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The output collection is sorted by the sum of the track pts.
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*/
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#include "FWCore/Framework/interface/Event.h"
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#include "FWCore/Framework/interface/EventSetup.h"
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#include "DataFormats/Common/interface/Handle.h"
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#include "DataFormats/VertexReco/interface/Vertex.h"
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#include "DataFormats/VertexReco/interface/VertexFwd.h"
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class PATPrimaryVertexSelector {
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public:
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typedef reco::VertexCollection collection;
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typedef std::vector<const reco::Vertex*> container;
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typedef container::const_iterator const_iterator;
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PATPrimaryVertexSelector (const edm::ParameterSet& cfg);
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/// needed for use with an ObjectSelector
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const_iterator begin() const { return selected_.begin(); }
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/// needed for use with an ObjectSelector
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const_iterator end() const { return selected_.end(); }
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/// needed for use with an ObjectSelector
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void select(const edm::Handle<collection>&, const edm::Event&, const edm::EventSetup&);
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/// needed for use with an ObjectSelector
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size_t size() const { return selected_.size(); }
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/// operator used in sorting the selected vertices
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bool operator() (const reco::Vertex*, const reco::Vertex*) const;
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private:
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/// access to track-related vertex quantities (multiplicity and pt-sum)
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void getVertexVariables (const reco::Vertex&, unsigned int&, double&) const;
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/// track selection
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bool acceptTrack (const reco::Track&) const;
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private:
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container selected_; /// container of selected vertices
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unsigned int multiplicityCut_; /// minimum multiplicity of (selected) associated tracks
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float ptSumCut_; /// minimum pt sum o (selected) associated tracks
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float trackEtaCut_; /// eta cut used for the track selection
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float chi2Cut_; /// cut on the normalized chi2
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float dr2Cut_; /// cut on the (squared) transverse position
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float dzCut_; /// cut on the longitudinal position
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};
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#endif
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