#include <METSignificance.h>

Public Member Functions
reco::METCovMatrix	getCovariance (const edm::View< reco::Jet > &jets, const std::vector< edm::Handle< reco::CandidateView > > &leptons, const edm::Handle< edm::View< reco::Candidate > > &pfCandidates, double rho, JME::JetResolution &resPtObj, JME::JetResolution &resPhiObj, JME::JetResolutionScaleFactor &resSFObj, bool isRealData, double &sumPtUnclustered, edm::ValueMap< float > const *weights=nullptr)

	METSignificance (const edm::ParameterSet &iConfig)

	~METSignificance ()

Static Public Member Functions
static double	getSignificance (const reco::METCovMatrix &cov, const reco::MET &met)

Private Member Functions
bool	cleanJet (const reco::Jet &jet, const std::vector< edm::Handle< reco::CandidateView > > &leptons)

Private Attributes
double	dR2match_

std::vector< double >	jetEtas_

std::vector< double >	jetParams_

double	jetThreshold_

std::vector< double >	pjetParams_

Detailed Description

Definition at line 33 of file METSignificance.h.

Constructor & Destructor Documentation

◆ METSignificance()

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

Definition at line 32 of file METSignificance.cc.

                                                                      {
   edm::ParameterSet cfgParams = iConfig.getParameter<edm::ParameterSet>("parameters");
  
   double dRmatch = cfgParams.getParameter<double>("dRMatch");
   dR2match_ = dRmatch * dRmatch;
  
   jetThreshold_ = cfgParams.getParameter<double>("jetThreshold");
   jetEtas_ = cfgParams.getParameter<std::vector<double> >("jeta");
   jetParams_ = cfgParams.getParameter<std::vector<double> >("jpar");
   pjetParams_ = cfgParams.getParameter<std::vector<double> >("pjpar");
 }

References dR2match_, edm::ParameterSet::getParameter(), jetEtas_, jetParams_, jetThreshold_, and pjetParams_.

◆ ~METSignificance()

METSignificance::~METSignificance ( )

Definition at line 44 of file METSignificance.cc.

44 {}

Member Function Documentation

◆ cleanJet()

bool METSignificance::cleanJet	(	const reco::Jet &	jet,
		const std::vector< edm::Handle< reco::CandidateView > > &	leptons
	)

private

Definition at line 198 of file METSignificance.cc.

                                                                                                 {
   for (const auto& lep_i : leptons) {
     for (const auto& lep : *lep_i) {
       if (reco::deltaR2(lep, jet) < dR2match_) {
         return false;
       }
     }
   }
   return true;
 }

References reco::deltaR2(), metsig::jet, and HLT_FULL_cff::leptons.

◆ getCovariance()

reco::METCovMatrix METSignificance::getCovariance	(	const edm::View< reco::Jet > &	jets,
		const std::vector< edm::Handle< reco::CandidateView > > &	leptons,
		const edm::Handle< edm::View< reco::Candidate > > &	pfCandidates,
		double	rho,
		JME::JetResolution &	resPtObj,
		JME::JetResolution &	resPhiObj,
		JME::JetResolutionScaleFactor &	resSFObj,
		bool	isRealData,
		double &	sumPtUnclustered,
		edm::ValueMap< float > const *	weights = `nullptr`
	)

Definition at line 46 of file METSignificance.cc.

                                                                                              {
   //pfcandidates
   const edm::View<reco::Candidate>& pfCandidates = *pfCandidatesH;
  
   // metsig covariance
   double cov_xx = 0;
   double cov_xy = 0;
   double cov_yy = 0;
  
   // for lepton and jet subtraction
   std::unordered_set<reco::CandidatePtr, ptr_hash> footprint;
  
   // subtract leptons out of sumPtUnclustered
   for (const auto& lep_i : leptons) {
     for (const auto& lep : lep_i->ptrs()) {
       if (lep->pt() > 10) {
         for (unsigned int n = 0; n < lep->numberOfSourceCandidatePtrs(); n++)
           footprint.insert(lep->sourceCandidatePtr(n));
       }
     }
   }
  
   std::vector<bool> cleanedJets(jets.size(), false);
   std::transform(jets.begin(), jets.end(), cleanedJets.begin(), [this, &leptons](auto const& jet) -> bool {
     return cleanJet(jet, leptons);
   });
   // subtract jets out of sumPtUnclustered
   auto iCleaned = cleanedJets.begin();
   for (const auto& jet : jets) {
     // disambiguate jets and leptons
     if (!(*iCleaned++))
       continue;
     for (unsigned int n = 0; n < jet.numberOfSourceCandidatePtrs(); n++) {
       footprint.insert(jet.sourceCandidatePtr(n));
     }
   }
  
   // calculate sumPtUnclustered
   for (size_t i = 0; i < pfCandidates.size(); ++i) {
     // check if candidate exists in a lepton or jet
     bool cleancand = true;
     if (footprint.find(pfCandidates.ptrAt(i)) == footprint.end()) {
       float weight = (weights != nullptr) ? (*weights)[pfCandidates.ptrAt(i)] : 1.0;
       //dP4 recovery
       for (const auto& it : footprint) {
         if (it.isNonnull() && it.isAvailable() && (reco::deltaR2(*it, pfCandidates[i]) < 0.00000025)) {
           cleancand = false;
           break;
         }
       }
       // if not, add to sumPtUnclustered
       if (cleancand) {
         sumPtUnclustered += pfCandidates[i].pt() * weight;
       }
     }
   }
  
   // add jets to metsig covariance matrix and subtract them from sumPtUnclustered
   iCleaned = cleanedJets.begin();
   for (const auto& jet : jets) {
     // disambiguate jets and leptons
     if (!(*iCleaned++))
       continue;
  
     double jpt = jet.pt();
  
     // split into high-pt and low-pt sector
     if (jpt > jetThreshold_) {
       // high-pt jets enter into the covariance matrix via JER
  
       double jeta = jet.eta();
       double feta = std::abs(jeta);
       double c = jet.px() / jpt;
       double s = jet.py() / jpt;
  
       JME::JetParameters parameters;
       parameters.setJetPt(jpt).setJetEta(jeta).setRho(rho);
  
       // jet energy resolutions
       double sigmapt = resPtObj.getResolution(parameters);
       double sigmaphi = resPhiObj.getResolution(parameters);
       // SF not needed since is already embedded in the sigma in the dataGlobalTag
       //      double sigmaSF = isRealData ? resSFObj.getScaleFactor(parameters) : 1.0;
  
       double scale = 0;
       if (feta < jetEtas_[0])
         scale = jetParams_[0];
       else if (feta < jetEtas_[1])
         scale = jetParams_[1];
       else if (feta < jetEtas_[2])
         scale = jetParams_[2];
       else if (feta < jetEtas_[3])
         scale = jetParams_[3];
       else
         scale = jetParams_[4];
  
       //         double dpt = sigmaSF*scale*jpt*sigmapt;
       double dpt = scale * jpt * sigmapt;
       double dph = jpt * sigmaphi;
  
       cov_xx += dpt * dpt * c * c + dph * dph * s * s;
       cov_xy += (dpt * dpt - dph * dph) * c * s;
       cov_yy += dph * dph * c * c + dpt * dpt * s * s;
  
     } else {
       // add the (corrected) jet to the sumPtUnclustered
       sumPtUnclustered += jpt;
     }
   }
  
   //protection against unphysical events
   if (sumPtUnclustered < 0)
     sumPtUnclustered = 0;
  
   // add pseudo-jet to metsig covariance matrix
   double pseudoJetCov = pjetParams_[0] * pjetParams_[0] + pjetParams_[1] * pjetParams_[1] * sumPtUnclustered;
   cov_xx += pseudoJetCov;
   cov_yy += pseudoJetCov;
  
   reco::METCovMatrix cov;
   cov(0, 0) = cov_xx;
   cov(1, 0) = cov_xy;
   cov(0, 1) = cov_xy;
   cov(1, 1) = cov_yy;
  
   return cov;
 }

References funct::abs(), c, reco::deltaR2(), JetMETHLTOfflineSource_cfi::feta, JME::JetResolution::getResolution(), mps_fire::i, metsig::jet, METSignificanceParams_cfi::jeta, singleTopDQM_cfi::jets, HLT_FULL_cff::leptons, dqmiodumpmetadata::n, zmumugammaAnalyzer_cfi::pfCandidates, alignCSCRings::s, L1EGammaCrystalsEmulatorProducer_cfi::scale, met_cff::sumPtUnclustered, HcalDetIdTransform::transform(), mps_merge::weight, and HLT_FULL_cff::weights.

Referenced by cms::PFMETProducer::getMETCovMatrix(), pat::PATMETProducer::getMETCovMatrix(), and cms::METSignificanceProducer::produce().

◆ getSignificance()

double METSignificance::getSignificance	(	const reco::METCovMatrix &	cov,
		const reco::MET &	met
	)

static

Definition at line 183 of file METSignificance.cc.

                                                                                              {
   // covariance matrix determinant
   double det = cov(0, 0) * cov(1, 1) - cov(0, 1) * cov(1, 0);
  
   // invert matrix
   double ncov_xx = cov(1, 1) / det;
   double ncov_xy = -cov(0, 1) / det;
   double ncov_yy = cov(0, 0) / det;
  
   // product of met and inverse of covariance
   double sig = met.px() * met.px() * ncov_xx + 2 * met.px() * met.py() * ncov_xy + met.py() * met.py() * ncov_yy;
  
   return sig;
 }