metsig::METSignificance Class Reference

#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.

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

                                                                     {
  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");
}

~METSignificance()

METSignificance::~METSignificance

(

)

Definition at line 44 of file METSignificance.cc.

{}

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.

References reco::deltaR2(), metsig::jet, and HLT_2022v15_cff::leptons.

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

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.

References funct::abs(), c, reco::deltaR2(), JetMETHLTOfflineSource_cfi::feta, JME::JetResolution::getResolution(), mps_fire::i, metsig::jet, METSignificanceParams_cfi::jeta, PDWG_EXODelayedJetMET_cff::jets, HLT_2022v15_cff::leptons, dqmiodumpmetadata::n, zmumugammaAnalyzer_cfi::pfCandidates, alignCSCRings::s, L1EGammaClusterEmuProducer_cfi::scale, met_cff::sumPtUnclustered, HcalDetIdTransform::transform(), mps_merge::weight, and hltDeepSecondaryVertexTagInfosPFPuppi_cfi::weights.

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

                                                                                             {
  //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;
}

getSignificance()

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

static

Definition at line 183 of file METSignificance.cc.

References BTaggingMonitor_cfi::met.

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

                                                                                             {
  // 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;
}

Member Data Documentation

dR2match_

double metsig::METSignificance::dR2match_

private

Definition at line 55 of file METSignificance.h.

Referenced by METSignificance().

jetEtas_

std::vector<double> metsig::METSignificance::jetEtas_

private

Definition at line 56 of file METSignificance.h.

Referenced by METSignificance().

jetParams_

std::vector<double> metsig::METSignificance::jetParams_

private

Definition at line 57 of file METSignificance.h.

Referenced by METSignificance().

jetThreshold_

double metsig::METSignificance::jetThreshold_

private

Definition at line 54 of file METSignificance.h.

Referenced by METSignificance().

pjetParams_

std::vector<double> metsig::METSignificance::pjetParams_

private

Definition at line 58 of file METSignificance.h.

Referenced by METSignificance().