Selects PFCandidates basing on their compatibility with vertex. More...

#include <PhysicsTools/PFCandProducer/interface/IPCutPFCandidateSelectorDefinition.h>

Inheritance diagram for pf2pat::IPCutPFCandidateSelectorDefinition:

Public Member Functions
	IPCutPFCandidateSelectorDefinition (const edm::ParameterSet &cfg)
void	select (const HandleToCollection &hc, const edm::Event &e, const edm::EventSetup &s)
Private Attributes
double	d0Cut_
double	d0SigCut_
double	dzCut_
double	dzSigCut_
edm::InputTag	vertices_

Detailed Description

Selects PFCandidates basing on their compatibility with vertex.

Author:: Giovanni Petrucciani

Version:

Id:: IPCutPFCandidateSelectorDefinition.h,v 1.1 2010/08/09 10:47:25 mbluj Exp

Definition at line 21 of file IPCutPFCandidateSelectorDefinition.h.

Constructor & Destructor Documentation

pf2pat::IPCutPFCandidateSelectorDefinition::IPCutPFCandidateSelectorDefinition ( const edm::ParameterSet & cfg ) [inline]

Definition at line 23 of file IPCutPFCandidateSelectorDefinition.h.

                                                                       :
      vertices_( cfg.getParameter<edm::InputTag> ( "vertices" ) ),
      d0Cut_( cfg.getParameter<double>("d0Cut") ),
      dzCut_( cfg.getParameter<double>("dzCut") ),
      d0SigCut_( cfg.getParameter<double>("d0SigCut") ),
      dzSigCut_( cfg.getParameter<double>("dzSigCut") ) {}

Member Function Documentation

void pf2pat::IPCutPFCandidateSelectorDefinition::select	(	const HandleToCollection &	hc,
		const edm::Event &	e,
		const edm::EventSetup &	s
	)		`[inline]`

Definition at line 30 of file IPCutPFCandidateSelectorDefinition.h.

References debug_cff::d0, d0Cut_, d0SigCut_, reco::TrackBase::dxy(), reco::TrackBase::dxyError(), reco::TrackBase::dz(), dzCut_, reco::TrackBase::dzError(), dzSigCut_, edm::Event::getByLabel(), combine::key, reco::Vertex::position(), pf2pat::PFCandidateSelectorDefinition::selected_, ExpressReco_HICollisions_FallBack::vertices, vertices_, reco::Vertex::xError(), reco::Vertex::yError(), and reco::Vertex::zError().

                                         {
      selected_.clear();
    
      edm::Handle<reco::VertexCollection> vertices;
      e.getByLabel(vertices_, vertices);
      if (vertices->empty()) return;
      const reco::Vertex &vtx = (*vertices)[0];

      unsigned key=0;
      for( collection::const_iterator pfc = hc->begin(); 
           pfc != hc->end(); ++pfc, ++key) {
        
        bool passing = true;
        const reco::Track *tk = 0;
        if (pfc->gsfTrackRef().isNonnull())   tk = pfc->gsfTrackRef().get();
        else if (pfc->trackRef().isNonnull()) tk = pfc->trackRef().get();

        if (tk != 0) {
          double d0 =  fabs(tk->dxy(vtx.position()));
          double dz =  fabs(tk->dz(vtx.position()));
          double d0e = hypot(tk->dxyError(), hypot(vtx.xError(), vtx.yError()));
          double dze = hypot(tk->dzError(),  vtx.zError());
          if (d0Cut_ > 0 && d0 > d0Cut_) passing = false;
          if (dzCut_ > 0 && dz > dzCut_) passing = false;
          if (d0SigCut_ > 0 && d0e > 0 && d0/d0e > d0SigCut_) passing = false;
          if (dzSigCut_ > 0 && dze > 0 && dz/dze > dzSigCut_) passing = false;
        }
        
        if( passing ) {
          selected_.push_back( reco::PFCandidate(*pfc) );
          reco::PFCandidatePtr ptrToMother( hc, key );
          selected_.back().setSourceCandidatePtr( ptrToMother );
        }
      }
    }