METAlgo Class Reference

#include <RecoMET/METAlgorithms/interface/METAlgo.h>

Public Member Functions
	METAlgo ()
virtual CommonMETData	run (edm::Handle< edm::View< reco::Candidate > > candidates, double globalThreshold=0.0)
virtual void	run (edm::Handle< edm::View< reco::Candidate > > candidates, CommonMETData *met, double globalThreshold=0.0)
virtual	~METAlgo ()

Detailed Description

Description: Calculates MET for given input

Implementation: [Notes on implementation]

Definition at line 25 of file METAlgo.h.

Constructor & Destructor Documentation

METAlgo::METAlgo ( )

inline

Definition at line 28 of file METAlgo.h.

{}

virtual METAlgo::~METAlgo ( )

inlinevirtual

Definition at line 29 of file METAlgo.h.

{}

Member Function Documentation

CommonMETData METAlgo::run ( edm::Handle< edm::View< reco::Candidate > >  candidates, double  globalThreshold = 0.0  )

virtual

Definition at line 16 of file METAlgo.cc.

References CaloMET_cfi::met.

Referenced by cms::METProducer::produce_CaloMET(), cms::METProducer::produce_else(), cms::METProducer::produce_PFClusterMET(), and cms::METProducer::produce_PFMET().

{
  CommonMETData met;
  run(candidates, &met, globalThreshold);
  return met;
}

void METAlgo::run ( edm::Handle< edm::View< reco::Candidate > >  candidates, CommonMETData *  met, double  globalThreshold = 0.0  )

virtual

Definition at line 24 of file METAlgo.cc.

References reco::Candidate::energy(), reco::Candidate::et(), i, CommonMETData::met, CommonMETData::mex, CommonMETData::mey, CommonMETData::mez, CommonMETData::phi, reco::Candidate::px(), reco::Candidate::py(), reco::Candidate::pz(), funct::sin(), mathSSE::sqrt(), CommonMETData::sumet, and reco::Candidate::theta().

{ 
  double px = 0.0;
  double py = 0.0;
  double pz = 0.0;
  double et = 0.0;

  for (unsigned int i = 0; i < candidates->size(); ++i)
  {
    const reco::Candidate &cand = (*candidates)[i];
    if( !(cand.et() > globalThreshold) ) continue;
    px += cand.px();
    py += cand.py();
    pz += cand.pz();
    et += cand.energy()*sin(cand.theta());
  }

  met->mex   = -px;
  met->mey   = -py;

  met->mez   = -pz; // included here since it might be useful
                    // for Data Quality Monitering as it should be 
                    // symmetrically distributed about the origin

  met->met   = sqrt( px*px + py*py );
  met->sumet = et;
  met->phi   = atan2( -py, -px ); // no longer needed as MET is now a candidate
}