PrimaryVertexSorting Class Reference

#include <PrimaryVertexSorting.h>

Public Types
enum	Quality {   UsedInFit =0, PrimaryDz, BTrack, OtherDz,   NotReconstructedPrimary, Unassigned =99 }

Public Member Functions
	PrimaryVertexSorting (const edm::ParameterSet &iConfig)
float	score (const reco::Vertex &pv, const std::vector< const reco::Candidate * > &candidates, bool useMet) const
	~PrimaryVertexSorting ()

Detailed Description

Definition at line 17 of file PrimaryVertexSorting.h.

Member Enumeration Documentation

enum PrimaryVertexSorting::Quality

Enumerator
UsedInFit
PrimaryDz
BTrack
OtherDz
NotReconstructedPrimary
Unassigned

Definition at line 19 of file PrimaryVertexSorting.h.

{UsedInFit=0,PrimaryDz,BTrack,OtherDz,NotReconstructedPrimary,Unassigned=99};

Constructor & Destructor Documentation

PrimaryVertexSorting::PrimaryVertexSorting ( const edm::ParameterSet &  iConfig )

inline

Definition at line 21 of file PrimaryVertexSorting.h.

  {}

PrimaryVertexSorting::~PrimaryVertexSorting ( )

inline

Definition at line 25 of file PrimaryVertexSorting.h.

References objects.IsoTrackAnalyzer::candidates, MetAnalyzer::pv(), and score().

{}

Member Function Documentation

float PrimaryVertexSorting::score	(	const reco::Vertex &	pv,
		const std::vector< const reco::Candidate * > &	candidates,
		bool	useMet
	)		const

Definition at line 18 of file PrimaryVertexSorting.cc.

References funct::abs(), reco::Candidate::bestTrack(), EnergyCorrector::c, mps_fire::i, edm::isNotFinite(), fwrapper::jets, RazorAnalyzer::met, or, reco::Candidate::p4(), p4, reco::Candidate::pdgId(), EnergyCorrector::pt, reco::Candidate::pt(), reco::TrackBase::ptError(), reco::Candidate::px(), reco::Candidate::py(), reco::Candidate::pz(), Scenarios_cff::scale, lumiContext::sequence, mathSSE::sqrt(), and objects.METAnalyzer::sumEt.

Referenced by PrimaryVertexSorter< ParticlesCollection >::produce(), and ~PrimaryVertexSorting().

                                                                                                                           {
  typedef math::XYZTLorentzVector LorentzVector;
  float sumPt2=0;
  float sumEt=0;
  LorentzVector met;
  std::vector<fastjet::PseudoJet> fjInputs_;  
  fjInputs_.clear();
  size_t countScale0 = 0;
  for (size_t i = 0 ; i < cands.size(); i++) {
    const reco::Candidate * c= cands[i];
    float scale=1.;
    if(c->bestTrack() != 0)
      {
    if(c->pt()!=0) {
             scale=(c->pt()-c->bestTrack()->ptError())/c->pt();
    }
    if(edm::isNotFinite(scale)) { 
        edm::LogWarning("PrimaryVertexSorting") << "Scaling is NAN ignoring this candidate/track" << std::endl;
        scale=0; 
        }
        if(scale<0){ 
      scale=0; 
      countScale0++;
    }
      }

    int absId=abs(c->pdgId());
    if(absId==13 or absId == 11) {
      float pt =c->pt()*scale;
      sumPt2+=pt*pt;
      met+=c->p4()*scale;
      sumEt+=c->pt()*scale;
    } else {
      if (scale != 0){ // otherwise, what is the point to cluster zeroes
    fjInputs_.push_back(fastjet::PseudoJet(c->px()*scale,c->py()*scale,c->pz()*scale,c->p4().E()*scale));
    //      fjInputs_.back().set_user_index(i);
      }
    }
  }
  fastjet::ClusterSequence sequence( fjInputs_, JetDefinition(antikt_algorithm, 0.4));
  auto jets = fastjet::sorted_by_pt(sequence.inclusive_jets(0));
  for (const auto & pj : jets) {
    auto p4 = LorentzVector( pj.px(), pj.py(), pj.pz(), pj.e() ) ;
    sumPt2+=(p4.pt()*p4.pt())*0.8*0.8;
    met+=p4;
    sumEt+=p4.pt();
  }
  float metAbove = met.pt() - 2*sqrt(sumEt);
  if(metAbove > 0 and useMet) {
    sumPt2+=metAbove*metAbove;
  }
  if (countScale0 == cands.size()) sumPt2 = countScale0*0.01; //leave some epsilon value to sort vertices with unknown pt
  return sumPt2;
}