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#ifndef RecoJets_JetAlgorithms_CATopJetAlgorithm_h
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#define RecoJets_JetAlgorithms_CATopJetAlgorithm_h
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/* *********************************************************
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* \class CATopJetAlgorithm
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* Jet producer to produce top jets using the C-A algorithm to break
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* jets into subjets as described here:
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* "Top-tagging: A Method for Identifying Boosted Hadronic Tops"
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* David E. Kaplan, Keith Rehermann, Matthew D. Schwartz, Brock Tweedie
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* arXiv:0806.0848v1 [hep-ph]
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*
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************************************************************/
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#include <vector>
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#include <list>
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#include <functional>
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#include <TMath.h>
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#include <iostream>
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#include "DataFormats/Candidate/interface/Candidate.h"
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#include "DataFormats/CaloTowers/interface/CaloTower.h"
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#include "DataFormats/CaloTowers/interface/CaloTowerFwd.h"
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#include "DataFormats/JetReco/interface/CaloJet.h"
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#include "DataFormats/JetReco/interface/CaloJetCollection.h"
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#include "DataFormats/JetReco/interface/BasicJet.h"
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#include "DataFormats/JetReco/interface/BasicJetCollection.h"
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#include "DataFormats/Math/interface/deltaR.h"
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#include "RecoJets/JetAlgorithms/interface/JetAlgoHelper.h"
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#include "RecoJets/JetAlgorithms/interface/CompoundPseudoJet.h"
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#include "DataFormats/Candidate/interface/LeafCandidate.h"
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#include "FWCore/Framework/interface/Event.h"
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#include "RecoJets/JetAlgorithms/interface/CompoundPseudoJet.h"
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#include <fastjet/JetDefinition.hh>
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#include <fastjet/PseudoJet.hh>
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#include <fastjet/ClusterSequence.hh>
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class CATopJetAlgorithm{
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public:
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/** Constructor
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*/
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CATopJetAlgorithm(edm::InputTag mSrc,
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bool verbose,
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int algorithm,
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int useAdjacency,
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double centralEtaCut,
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double ptMin,
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const std::vector<double> & sumEtBins,
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const std::vector<double> & rBins,
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const std::vector<double> & ptFracBins,
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const std::vector<double> & deltarBins,
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const std::vector<double> & nCellBins,
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double seedThreshold,
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bool useMaxTower,
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double sumEtEtaCut,
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double etFrac) :
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mSrc_ (mSrc ),
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verbose_ (verbose ),
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algorithm_ (algorithm ),
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useAdjacency_ (useAdjacency ),
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centralEtaCut_ (centralEtaCut ),
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ptMin_ (ptMin ),
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sumEtBins_ (sumEtBins ),
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rBins_ (rBins ),
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ptFracBins_ (ptFracBins ),
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deltarBins_ (deltarBins ),
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nCellBins_ (nCellBins ),
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seedThreshold_ (seedThreshold ),
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useMaxTower_ (useMaxTower ),
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sumEtEtaCut_ (sumEtEtaCut ),
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etFrac_ (etFrac )
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{ }
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/// Find the ProtoJets from the collection of input Candidates.
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void run( const std::vector<fastjet::PseudoJet> & cell_particles,
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std::vector<CompoundPseudoJet> & hardjetsOutput,
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edm::EventSetup const & c
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);
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private:
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edm::InputTag mSrc_; //<! calo tower input source
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bool verbose_; //<!
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int algorithm_; //<! 0 = KT, 1 = CA, 2 = anti-KT
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int useAdjacency_; //<! choose adjacency requirement:
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//<! 0 = no adjacency
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//<! 1 = deltar adjacency
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//<! 2 = modified adjacency
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//<! 3 = calotower neirest neigbor based adjacency (untested)
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double centralEtaCut_; //<! eta for defining "central" jets
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double ptMin_; //<! lower pt cut on which jets to reco
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std::vector<double> sumEtBins_; //<! sumEt bins over which cuts vary. vector={bin 0 lower bound, bin 1 lower bound, ...}
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std::vector<double> rBins_; //<! Jet distance paramter R. R values depend on sumEt bins.
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std::vector<double> ptFracBins_; //<! deltap = fraction of full jet pt for a subjet to be consider "hard".
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std::vector<double> deltarBins_; //<! Applicable only if useAdjacency=1. deltar adjacency values for each sumEtBin
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std::vector<double> nCellBins_; //<! Applicable only if useAdjacency=3. number of cells apart for two subjets to be considered "independent"
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// NOT USED:
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double seedThreshold_; //<! calo tower seed threshold - NOT USED
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bool useMaxTower_; //<! use max tower for jet adjacency criterion, false is to use the centroid - NOT USED
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double sumEtEtaCut_; //<! eta for event SumEt - NOT USED
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double etFrac_; //<! fraction of event sumEt / 2 for a jet to be considered "hard" - NOT USED
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std::string jetType_; //<! CaloJets or GenJets - NOT USED
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// Decide if the two jets are in adjacent cells
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bool adjacentCells(const fastjet::PseudoJet & jet1, const fastjet::PseudoJet & jet2,
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const std::vector<fastjet::PseudoJet> & cell_particles,
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const fastjet::ClusterSequence & theClusterSequence,
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double nCellMin ) const;
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// Attempt to break up one "hard" jet into two "soft" jets
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bool decomposeJet(const fastjet::PseudoJet & theJet,
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const fastjet::ClusterSequence & theClusterSequence,
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const std::vector<fastjet::PseudoJet> & cell_particles,
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double ptHard, double nCellMin, double deltarcut,
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fastjet::PseudoJet & ja, fastjet::PseudoJet & jb,
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std::vector<fastjet::PseudoJet> & leftovers) const;
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};
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#endif
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