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File indexing completed on 2022-04-18 22:23:53

0001 #ifndef HLTrigger_JetMET_plugins_HLTJetHFCleaner_h
0002 #define HLTrigger_JetMET_plugins_HLTJetHFCleaner_h
0003 
0004 // -*- C++ -*-
0005 //
0006 // Package:    HLTrigger/JetMET
0007 // Class:      HLTJetHFCleaner
0008 //
0009 /**\class HLTJetHFCleaner HLTJetHFCleaner.cc HLTrigger/HLTJetHFCleaner/plugins/HLTJetHFCleaner.cc
0010 
0011  Description: Cleaning module that produces a cleaned set of jets after applying forward jet cuts.
0012 
0013  Implementation:
0014     This module creates a new HF-cleaned jet collection by skimming out the forward jets that fail the forward jet cuts. 
0015     Only the forward high pt jets (|eta| > etaMin_ & pt > jetPtMin_) are considered for the cuts.
0016     The cuts are based on the following HF shape variables: sigmaEtaEta, sigmaPhiPhi and centralStripSize.
0017     
0018     This module applies the following cuts to such jets:
0019       sigmaEtaEta - sigmaPhiPhi <= sigmaEtaPhiDiffMax_
0020       centralStripSize <= centralEtaStripSizeMax_
0021     
0022     In addition, forward jets in the corner-region phase space of sigmaEtaEta-sigmaPhiPhi phase space, 
0023     such that:
0024       (sigmaEtaEta < cornerCutSigmaEtaEta_) & (sigmaPhiPhi < cornerCutSigmaPhiPhi_)
0025     the jets will be discarded as well.
0026 
0027     All cuts (and whether to apply the cuts) can be configured using the PSet interface of this module.
0028 
0029 */
0030 //
0031 // Original Author:  Alp Akpinar
0032 //         Created:  Wed, 01 Dec 2021 15:47:19 GMT
0033 //
0034 //
0035 
0036 #include <memory>
0037 #include <vector>
0038 
0039 #include "FWCore/Framework/interface/Frameworkfwd.h"
0040 #include "FWCore/Framework/interface/global/EDProducer.h"
0041 #include "FWCore/Framework/interface/Event.h"
0042 #include "FWCore/Framework/interface/MakerMacros.h"
0043 #include "FWCore/ParameterSet/interface/ParameterSet.h"
0044 #include "FWCore/Utilities/interface/StreamID.h"
0045 #include "FWCore/Utilities/interface/Exception.h"
0046 #include "DataFormats/Common/interface/Ref.h"
0047 #include "DataFormats/JetReco/interface/Jet.h"
0048 #include "DataFormats/Math/interface/deltaPhi.h"
0049 #include "DataFormats/METReco/interface/MET.h"
0050 
0051 template <typename JetType>
0052 class HLTJetHFCleaner : public edm::global::EDProducer<> {
0053 public:
0054   typedef std::vector<JetType> JetCollection;
0055   typedef edm::Ref<JetCollection> JetRef;
0056   explicit HLTJetHFCleaner(const edm::ParameterSet&);
0057   ~HLTJetHFCleaner() override = default;
0058 
0059   static void fillDescriptions(edm::ConfigurationDescriptions& descriptions);
0060 
0061 private:
0062   void produce(edm::StreamID, edm::Event&, const edm::EventSetup&) const override;
0063 
0064   const edm::EDGetTokenT<std::vector<JetType>> jetToken_;
0065   const edm::EDGetTokenT<edm::View<reco::MET>> metToken_;
0066 
0067   const edm::EDGetTokenT<edm::ValueMap<float>> sigmaEtaEtaToken_;
0068   const edm::EDGetTokenT<edm::ValueMap<float>> sigmaPhiPhiToken_;
0069   const edm::EDGetTokenT<edm::ValueMap<int>> centralEtaStripSizeToken_;
0070 
0071   // Minimum jet pt to consider while applying HF cuts
0072   const float jetPtMin_;
0073   const float dphiJetMetMin_;
0074 
0075   // Cuts will be applied to jets only with jetEtaMin_ < |eta| < jetEtaMax_
0076   const float jetEtaMin_;
0077   const float jetEtaMax_;
0078 
0079   const float sigmaEtaPhiDiffMax_;
0080   const float centralEtaStripSizeMax_;
0081   const float cornerCutSigmaEtaEta_;
0082   const float cornerCutSigmaPhiPhi_;
0083   const bool applySigmaEtaPhiCornerCut_;
0084   const bool applySigmaEtaPhiCut_;
0085   const bool applyStripSizeCut_;
0086 };
0087 
0088 template <typename JetType>
0089 HLTJetHFCleaner<JetType>::HLTJetHFCleaner(const edm::ParameterSet& iConfig)
0090     : jetToken_(consumes(iConfig.getParameter<edm::InputTag>("jets"))),
0091       metToken_(consumes(iConfig.getParameter<edm::InputTag>("mets"))),
0092       sigmaEtaEtaToken_(consumes(iConfig.getParameter<edm::InputTag>("sigmaEtaEta"))),
0093       sigmaPhiPhiToken_(consumes(iConfig.getParameter<edm::InputTag>("sigmaPhiPhi"))),
0094       centralEtaStripSizeToken_(consumes(iConfig.getParameter<edm::InputTag>("centralEtaStripSize"))),
0095       jetPtMin_(iConfig.getParameter<double>("jetPtMin")),
0096       dphiJetMetMin_(iConfig.getParameter<double>("dphiJetMetMin")),
0097       jetEtaMin_(iConfig.getParameter<double>("jetEtaMin")),
0098       jetEtaMax_(iConfig.getParameter<double>("jetEtaMax")),
0099       sigmaEtaPhiDiffMax_(iConfig.getParameter<double>("sigmaEtaPhiDiffMax")),
0100       centralEtaStripSizeMax_(iConfig.getParameter<int>("centralEtaStripSizeMax")),
0101       cornerCutSigmaEtaEta_(iConfig.getParameter<double>("cornerCutSigmaEtaEta")),
0102       cornerCutSigmaPhiPhi_(iConfig.getParameter<double>("cornerCutSigmaPhiPhi")),
0103       applySigmaEtaPhiCornerCut_(iConfig.getParameter<bool>("applySigmaEtaPhiCornerCut")),
0104       applySigmaEtaPhiCut_(iConfig.getParameter<bool>("applySigmaEtaPhiCut")),
0105       applyStripSizeCut_(iConfig.getParameter<bool>("applyStripSizeCut")) {
0106   produces<JetCollection>();
0107 }
0108 
0109 template <typename JetType>
0110 void HLTJetHFCleaner<JetType>::produce(edm::StreamID, edm::Event& iEvent, const edm::EventSetup&) const {
0111   auto const jets = iEvent.getHandle(jetToken_);
0112   auto const& mets = iEvent.get(metToken_);
0113 
0114   // The set of cleaned jets
0115   auto cleaned_jets = std::make_unique<JetCollection>();
0116   cleaned_jets->reserve(jets->size());
0117 
0118   // Check if length of the MET vector is 1, throw exception otherwise
0119   if (mets.size() != 1) {
0120     throw cms::Exception("ComparisonFailure") << "Size of reco::MET collection is different from 1";
0121   }
0122   auto const met_phi = mets.front().phi();
0123 
0124   // HF shape variables gathered from valueMaps
0125   // Normally, these valueMaps are the output of the HFJetShowerShape module:
0126   // https://github.com/cms-sw/cmssw/blob/master/RecoJets/JetProducers/plugins/HFJetShowerShape.cc
0127   auto const& sigmaEtaEtas = iEvent.get(sigmaEtaEtaToken_);
0128   auto const& sigmaPhiPhis = iEvent.get(sigmaPhiPhiToken_);
0129   auto const& centralEtaStripSizes = iEvent.get(centralEtaStripSizeToken_);
0130 
0131   // Loop over the jets and do cleaning
0132   for (uint ijet = 0; ijet < jets->size(); ijet++) {
0133     auto const jet = (*jets)[ijet];
0134     auto const withinEtaRange = (std::abs(jet.eta()) < jetEtaMax_) and (std::abs(jet.eta()) > jetEtaMin_);
0135     // Cuts are applied to jets that are back to back with MET
0136     if (std::abs(reco::deltaPhi(jet.phi(), met_phi)) <= dphiJetMetMin_) {
0137       cleaned_jets->emplace_back(jet);
0138       continue;
0139     }
0140     // If the jet is outside the range that we're interested in,
0141     // append it to the cleaned jets collection and continue
0142     if ((jet.pt() < jetPtMin_) or (!withinEtaRange)) {
0143       cleaned_jets->emplace_back(jet);
0144       continue;
0145     }
0146 
0147     JetRef const jetRef(jets, ijet);
0148 
0149     // Cuts related to eta and phi width of HF showers:
0150     // Sigma eta-phi based cut + central strip size cut
0151     // We'll apply the sigma eta+phi dependent cut only if requested via the config file
0152     if (applySigmaEtaPhiCut_) {
0153       // Sigma eta eta and sigma phi phi
0154       auto const sigmaEtaEta = sigmaEtaEtas[jetRef];
0155       auto const sigmaPhiPhi = sigmaPhiPhis[jetRef];
0156 
0157       // Check if sigma eta eta and sigma phi phi are both set to -1.
0158       // If this is the case, we can skip the jet without evaluating any mask.
0159       if ((sigmaEtaEta < 0) and (sigmaPhiPhi < 0)) {
0160         cleaned_jets->emplace_back(jet);
0161         continue;
0162       }
0163 
0164       auto passSigmaEtaPhiCut = (sigmaEtaEta - sigmaPhiPhi) <= sigmaEtaPhiDiffMax_;
0165 
0166       if (applySigmaEtaPhiCornerCut_) {
0167         auto const inCorner = (sigmaEtaEta < cornerCutSigmaEtaEta_) and (sigmaPhiPhi < cornerCutSigmaPhiPhi_);
0168         passSigmaEtaPhiCut &= !inCorner;
0169       }
0170       if (!passSigmaEtaPhiCut) {
0171         continue;
0172       }
0173     }
0174 
0175     // Cut related to central strip size
0176     if (applyStripSizeCut_ and (centralEtaStripSizes[jetRef] > centralEtaStripSizeMax_)) {
0177       continue;
0178     }
0179 
0180     cleaned_jets->emplace_back(jet);
0181   }
0182 
0183   iEvent.put(std::move(cleaned_jets));
0184 }
0185 
0186 // ------------ method fills 'descriptions' with the allowed parameters for the module  ------------
0187 template <typename JetType>
0188 void HLTJetHFCleaner<JetType>::fillDescriptions(edm::ConfigurationDescriptions& descriptions) {
0189   edm::ParameterSetDescription desc;
0190   desc.add<edm::InputTag>("jets", edm::InputTag("hltAK4PFJetsTightIDCorrected"))->setComment("Input jet collection.");
0191   desc.add<edm::InputTag>("mets", edm::InputTag("hltMet"))->setComment("Input MET collection.");
0192   desc.add<edm::InputTag>("sigmaEtaEta", edm::InputTag("hltHFJetShowerShape", "sigmaEtaEta"))
0193       ->setComment("Input collection which stores the sigmaEtaEta values per jet.");
0194   desc.add<edm::InputTag>("sigmaPhiPhi", edm::InputTag("hltHFJetShowerShape", "sigmaPhiPhi"))
0195       ->setComment("Input collection which stores the sigmaPhiPhis values per jet.");
0196   desc.add<edm::InputTag>("centralEtaStripSize", edm::InputTag("hltHFJetShowerShape", "centralEtaStripSize"))
0197       ->setComment("Input collection which stores the central strip size values per jet.");
0198   desc.add<double>("jetPtMin", 100)->setComment("The minimum pt value for a jet such that the cuts will be applied.");
0199   desc.add<double>("dphiJetMetMin", 2.5)
0200       ->setComment(
0201           "The minimum value for deltaPhi between jet and MET, such that the cuts will be applied to a given jet.");
0202   desc.add<double>("jetEtaMin", 2.9)->setComment("Minimum value of jet |eta| for which the cuts will be applied.");
0203   desc.add<double>("jetEtaMax", 5.0)->setComment("Maximum value of jet |eta| for which the cuts will be applied.");
0204   desc.add<double>("sigmaEtaPhiDiffMax", 0.05)
0205       ->setComment("Determines the threshold in the following cut: sigmaEtaEta-sigmaPhiPhi <= X");
0206   desc.add<double>("cornerCutSigmaEtaEta", 0.02)
0207       ->setComment(
0208           "Corner cut value for sigmaEtaEta. Jets will be cut if both sigmaEtaEta and sigmaPhiPhi are lower than the "
0209           "corner value.");
0210   desc.add<double>("cornerCutSigmaPhiPhi", 0.02)
0211       ->setComment(
0212           "Corner cut value for sigmaPhiPhi. Jets will be cut if both sigmaEtaEta and sigmaPhiPhi are lower than the "
0213           "corner value.");
0214   desc.add<int>("centralEtaStripSizeMax", 2)
0215       ->setComment("Determines the threshold in the following cut: centralEtaStripSize <= X");
0216   desc.add<bool>("applySigmaEtaPhiCornerCut", true)->setComment("Boolean specifying whether to apply the corner cut.");
0217   desc.add<bool>("applySigmaEtaPhiCut", true)
0218       ->setComment("Boolean specifying whether to apply the sigmaEtaEta-sigmaPhiPhi cut.");
0219   desc.add<bool>("applyStripSizeCut", true)
0220       ->setComment("Boolean specifying whether to apply the centralEtaStripSize cut.");
0221   descriptions.addWithDefaultLabel(desc);
0222 }
0223 
0224 #endif