#include <ShiftedPFCandidateProducerForNoPileUpPFMEt.h>

Inheritance diagram for ShiftedPFCandidateProducerForNoPileUpPFMEt:

Public Member Functions
	ShiftedPFCandidateProducerForNoPileUpPFMEt (const edm::ParameterSet &)

	~ShiftedPFCandidateProducerForNoPileUpPFMEt () override

Public Member Functions inherited from edm::stream::EDProducer<>
	EDProducer ()=default

bool	hasAbilityToProduceInBeginLumis () const final

bool	hasAbilityToProduceInBeginRuns () const final

bool	hasAbilityToProduceInEndLumis () const final

bool	hasAbilityToProduceInEndRuns () const final

Private Member Functions
void	produce (edm::Event &, const edm::EventSetup &) override

Private Attributes
JetCorrectionUncertainty *	jecUncertainty_

edm::FileInPath	jetCorrInputFileName_

JetCorrectorParameters *	jetCorrParameters_

std::string	jetCorrPayloadName_

std::string	jetCorrUncertaintyTag_

double	minJetPt_

double	shiftBy_

edm::EDGetTokenT< reco::PFJetCollection >	srcJetsToken_

edm::EDGetTokenT< reco::PFCandidateCollection >	srcPFCandidatesToken_

double	unclEnUncertainty_

Additional Inherited Members
Public Types inherited from edm::stream::EDProducer<>
typedef CacheContexts< T... >	CacheTypes

typedef CacheTypes::GlobalCache	GlobalCache

typedef AbilityChecker< T... >	HasAbility

typedef CacheTypes::LuminosityBlockCache	LuminosityBlockCache

typedef LuminosityBlockContextT< LuminosityBlockCache, RunCache, GlobalCache >	LuminosityBlockContext

typedef CacheTypes::LuminosityBlockSummaryCache	LuminosityBlockSummaryCache

typedef CacheTypes::RunCache	RunCache

typedef RunContextT< RunCache, GlobalCache >	RunContext

typedef CacheTypes::RunSummaryCache	RunSummaryCache

Detailed Description

Vary energy of PFCandidates which are (are not) within jets of Pt > 10 GeV by jet energy uncertainty (by 10% "unclustered" energy uncertainty)

NOTE: Auxiliary class specific to estimating systematic uncertainty on PFMET reconstructed by no-PU MET reconstruction algorithm (implemented in JetMETCorrections/Type1MET/src/NoPileUpPFMETProducer.cc)

In case all PFCandidates not within jets of Pt > 30 GeV would be varied by the 10% "unclustered" energy uncertainty, the systematic uncertainty on the reconstructed no-PU MET would be overestimated significantly !!

Author: Christian Veelken, LLR

Definition at line 42 of file ShiftedPFCandidateProducerForNoPileUpPFMEt.h.

Constructor & Destructor Documentation

◆ ShiftedPFCandidateProducerForNoPileUpPFMEt()

ShiftedPFCandidateProducerForNoPileUpPFMEt::ShiftedPFCandidateProducerForNoPileUpPFMEt ( const edm::ParameterSet & cfg )

explicit

Definition at line 8 of file ShiftedPFCandidateProducerForNoPileUpPFMEt.cc.

     : srcPFCandidatesToken_(consumes<reco::PFCandidateCollection>(cfg.getParameter<edm::InputTag>("srcPFCandidates"))),
       srcJetsToken_(consumes<reco::PFJetCollection>(cfg.getParameter<edm::InputTag>("srcJets"))) {
   jetCorrUncertaintyTag_ = cfg.getParameter<std::string>("jetCorrUncertaintyTag");
   if (cfg.exists("jetCorrInputFileName")) {
     jetCorrInputFileName_ = cfg.getParameter<edm::FileInPath>("jetCorrInputFileName");
     if (jetCorrInputFileName_.location() == edm::FileInPath::Unknown)
       throw cms::Exception("ShiftedJetProducerT")
           << " Failed to find JEC parameter file = " << jetCorrInputFileName_ << " !!\n";
     jetCorrParameters_ = new JetCorrectorParameters(jetCorrInputFileName_.fullPath(), jetCorrUncertaintyTag_);
     jecUncertainty_ = new JetCorrectionUncertainty(*jetCorrParameters_);
   } else {
     jetCorrPayloadName_ = cfg.getParameter<std::string>("jetCorrPayloadName");
   }
  
   minJetPt_ = cfg.getParameter<double>("minJetPt");
  
   shiftBy_ = cfg.getParameter<double>("shiftBy");
  
   unclEnUncertainty_ = cfg.getParameter<double>("unclEnUncertainty");
  
   produces<reco::PFCandidateCollection>();
 }

References looper::cfg, edm::FileInPath::fullPath(), jecUncertainty_, jetCorrInputFileName_, jetCorrParameters_, jetCorrPayloadName_, jetCorrUncertaintyTag_, edm::FileInPath::location(), minJetPt_, shiftBy_, AlCaHLTBitMon_QueryRunRegistry::string, unclEnUncertainty_, and edm::FileInPath::Unknown.

◆ ~ShiftedPFCandidateProducerForNoPileUpPFMEt()

ShiftedPFCandidateProducerForNoPileUpPFMEt::~ShiftedPFCandidateProducerForNoPileUpPFMEt ( )

override

Definition at line 32 of file ShiftedPFCandidateProducerForNoPileUpPFMEt.cc.

                                                                                         {
   // nothing to be done yet...
 }

Member Function Documentation

◆ produce()

void ShiftedPFCandidateProducerForNoPileUpPFMEt::produce	(	edm::Event &	evt,
		const edm::EventSetup &	es
	)

overrideprivate

Definition at line 36 of file ShiftedPFCandidateProducerForNoPileUpPFMEt.cc.

                                                                                                {
   edm::Handle<reco::PFCandidateCollection> originalPFCandidates;
   evt.getByToken(srcPFCandidatesToken_, originalPFCandidates);
  
   edm::Handle<reco::PFJetCollection> jets;
   evt.getByToken(srcJetsToken_, jets);
  
   std::vector<const reco::PFJet*> selectedJets;
   for (reco::PFJetCollection::const_iterator jet = jets->begin(); jet != jets->end(); ++jet) {
     if (jet->pt() > minJetPt_)
       selectedJets.push_back(&(*jet));
   }
  
   if (!jetCorrPayloadName_.empty()) {
     edm::ESHandle<JetCorrectorParametersCollection> jetCorrParameterSet;
     es.get<JetCorrectionsRecord>().get(jetCorrPayloadName_, jetCorrParameterSet);
     const JetCorrectorParameters& jetCorrParameters = (*jetCorrParameterSet)[jetCorrUncertaintyTag_];
     delete jecUncertainty_;
     jecUncertainty_ = new JetCorrectionUncertainty(jetCorrParameters);
   }
  
   auto shiftedPFCandidates = std::make_unique<reco::PFCandidateCollection>();
   for (reco::PFCandidateCollection::const_iterator originalPFCandidate = originalPFCandidates->begin();
        originalPFCandidate != originalPFCandidates->end();
        ++originalPFCandidate) {
     const reco::PFJet* jet_matched = nullptr;
     for (std::vector<const reco::PFJet*>::iterator jet = selectedJets.begin(); jet != selectedJets.end(); ++jet) {
       std::vector<reco::PFCandidatePtr> jetConstituents = (*jet)->getPFConstituents();
       for (std::vector<reco::PFCandidatePtr>::const_iterator jetConstituent = jetConstituents.begin();
            jetConstituent != jetConstituents.end() && !jet_matched;
            ++jetConstituent) {
         if (deltaR(originalPFCandidate->p4(), (*jetConstituent)->p4()) < 1.e-2)
           jet_matched = (*jet);
       }
     }
  
     double shift = 0.;
     if (jet_matched) {
       jecUncertainty_->setJetEta(jet_matched->eta());
       jecUncertainty_->setJetPt(jet_matched->pt());
  
       shift = jecUncertainty_->getUncertainty(true);
     } else {
       shift = unclEnUncertainty_;
     }
  
     shift *= shiftBy_;
  
     reco::Candidate::LorentzVector shiftedPFCandidateP4 = originalPFCandidate->p4();
     shiftedPFCandidateP4 *= (1. + shift);
  
     reco::PFCandidate shiftedPFCandidate(*originalPFCandidate);
     shiftedPFCandidate.setP4(shiftedPFCandidateP4);
  
     shiftedPFCandidates->push_back(shiftedPFCandidate);
   }
  
   evt.put(std::move(shiftedPFCandidates));
 }