CATopJetProducer.cc

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#include "FWCore/Framework/interface/MakerMacros.h"
#include "CATopJetProducer.h"


using namespace edm;
using namespace cms;
using namespace reco;
using namespace std;

CATopJetProducer::CATopJetProducer(edm::ParameterSet const& conf):
       FastjetJetProducer( conf ),
       tagAlgo_(conf.getParameter<int>("tagAlgo")),
       ptMin_(conf.getParameter<double>("jetPtMin")),
       centralEtaCut_(conf.getParameter<double>("centralEtaCut")),
       verbose_(conf.getParameter<bool>("verbose"))
{

    if (tagAlgo_ == CA_TOPTAGGER ) {
        
        legacyCMSTopTagger_ = std::auto_ptr<CATopJetAlgorithm>(
            new CATopJetAlgorithm(src_,
            conf.getParameter<bool>  ("verbose"),              
                conf.getParameter<int>  ("algorithm"),                  // 0 = KT, 1 = CA, 2 = anti-KT
                conf.getParameter<int>   ("useAdjacency"),                  // choose adjacency requirement:
                                                                //  0 = no adjacency
                                                                //  1 = deltar adjacency 
                                                                //  2 = modified adjacency
                                                                //  3 = calotower neirest neigbor based adjacency (untested)
               conf.getParameter<double>("centralEtaCut"),              // eta for defining "central" jets
               conf.getParameter<double>("jetPtMin"),                   // min jet pt
               conf.getParameter<std::vector<double> >("sumEtBins"),    // sumEt bins over which cuts may vary. vector={bin 0 lower bound, bin 1 lower bound, ...} 
               conf.getParameter<std::vector<double> >("rBins"),        // Jet distance paramter R. R values depend on sumEt bins.
               conf.getParameter<std::vector<double> >("ptFracBins"),   // fraction of hard jet pt that subjet must have (deltap)
               conf.getParameter<std::vector<double> >("deltarBins"),   // Applicable only if useAdjacency=1. deltar adjacency values for each sumEtBin
               conf.getParameter<std::vector<double> >("nCellBins"),    // Applicable only if useAdjacency=3. number of cells to consider two subjets adjacent
               conf.getParameter<double>("inputEtMin"),                 // seed threshold - NOT USED
               conf.getParameter<bool>  ("useMaxTower"),                // use max tower as adjacency criterion, otherwise use centroid - NOT USED
               conf.getParameter<double>("sumEtEtaCut"),                // eta for event SumEt - NOT USED
            conf.getParameter<double>("etFrac")                     // fraction of event sumEt / 2 for a jet to be considered "hard" -NOT USED
            ));
    }
    else if (tagAlgo_ == FJ_CMS_TOPTAG ) {
        fjCMSTopTagger_ = std::auto_ptr<fastjet::CMSTopTagger>(
            new fastjet::CMSTopTagger(conf.getParameter<double> ("ptFrac"),
                          conf.getParameter<double> ("rFrac"),
                          conf.getParameter<double> ("adjacencyParam"))
        );
    }
    else if (tagAlgo_ == FJ_JHU_TOPTAG ) {
        fjJHUTopTagger_ = std::auto_ptr<fastjet::JHTopTagger>(
            new fastjet::JHTopTagger(conf.getParameter<double>("ptFrac"),
                         conf.getParameter<double>("deltaRCut"),
                         conf.getParameter<double>("cosThetaWMax")
                         )
        );
    }
    else if (tagAlgo_ == FJ_NSUB_TAG ) {
        
        fastjet::JetDefinition::Plugin *plugin = new fastjet::SISConePlugin(0.6, 0.75);
        fastjet::JetDefinition NsubJetDef(plugin);
        fjNSUBTagger_ = std::auto_ptr<fastjet::RestFrameNSubjettinessTagger>(
            new fastjet::RestFrameNSubjettinessTagger(NsubJetDef,
                                  conf.getParameter<double>("tau2Cut"),
                                  conf.getParameter<double>("cosThetaSCut"),
                                  conf.getParameter<bool>("useExclusive")
                                  )
        );
    }
                
        



}

void CATopJetProducer::produce(  edm::Event & e, const edm::EventSetup & c ) 
{
  FastjetJetProducer::produce(e, c);
}

void CATopJetProducer::runAlgorithm( edm::Event& iEvent, const edm::EventSetup& iSetup)
{
  if ( !doAreaFastjet_ && !doRhoFastjet_) {
    fjClusterSeq_ = ClusterSequencePtr( new fastjet::ClusterSequence( fjInputs_, *fjJetDefinition_ ) );
  } else if (voronoiRfact_ <= 0) {
    fjClusterSeq_ = ClusterSequencePtr( new fastjet::ClusterSequenceArea( fjInputs_, *fjJetDefinition_ , *fjAreaDefinition_ ) );
  } else {
    fjClusterSeq_ = ClusterSequencePtr( new fastjet::ClusterSequenceVoronoiArea( fjInputs_, *fjJetDefinition_ , fastjet::VoronoiAreaSpec(voronoiRfact_) ) );
  }

  if (tagAlgo_ == CA_TOPTAGGER){
    (*legacyCMSTopTagger_).run( fjInputs_, fjJets_, fjClusterSeq_ );
    
  }
  else {
    
    //Run the jet clustering
    vector<fastjet::PseudoJet> inclusiveJets = fjClusterSeq_->inclusive_jets(ptMin_);

    if ( verbose_ ) cout << "Getting central jets" << endl;
    // Find the transient central jets
    vector<fastjet::PseudoJet> centralJets;
    for (unsigned int i = 0; i < inclusiveJets.size(); i++) {
        
        if (inclusiveJets[i].perp() > ptMin_ && fabs(inclusiveJets[i].rapidity()) < centralEtaCut_) {
            centralJets.push_back(inclusiveJets[i]);
        }
    }

    fastjet::CMSTopTagger & CMSTagger = *fjCMSTopTagger_;
    fastjet::JHTopTagger & JHUTagger = *fjJHUTopTagger_;
    fastjet::RestFrameNSubjettinessTagger & NSUBTagger = *fjNSUBTagger_;


    vector<fastjet::PseudoJet>::iterator jetIt = centralJets.begin(), centralJetsEnd = centralJets.end();
    if ( verbose_ )cout<<"Loop over jets"<<endl;
    for ( ; jetIt != centralJetsEnd; ++jetIt ) {
        
        if (verbose_) cout << "CMS FJ jet pt: " << (*jetIt).perp() << endl;

        fastjet::PseudoJet taggedJet;
        if (tagAlgo_ == FJ_CMS_TOPTAG) taggedJet = CMSTagger.result(*jetIt);
        else if (tagAlgo_ == FJ_JHU_TOPTAG) taggedJet = JHUTagger.result(*jetIt);
        else if (tagAlgo_ == FJ_NSUB_TAG) taggedJet = NSUBTagger.result(*jetIt);
        else cout << "NOT A VALID TAGGING ALGORITHM CHOICE!" << endl;

        if (taggedJet != 0) fjJets_.push_back(taggedJet);
    }
  }
} 
//define this as a plug-in
DEFINE_FWK_MODULE(CATopJetProducer);