#include <CATopJetAlgorithm.h>

Public Member Functions
	CATopJetAlgorithm (edm::InputTag mSrc, bool verbose, int algorithm, int useAdjacency, double centralEtaCut, double ptMin, const std::vector< double > &sumEtBins, const std::vector< double > &rBins, const std::vector< double > &ptFracBins, const std::vector< double > &deltarBins, const std::vector< double > &nCellBins, double seedThreshold, bool useMaxTower, double sumEtEtaCut, double etFrac)
void	run (const std::vector< fastjet::PseudoJet > &cell_particles, std::vector< fastjet::PseudoJet > &hardjetsOutput, boost::shared_ptr< fastjet::ClusterSequence > &fjClusterSeq)
	Find the ProtoJets from the collection of input Candidates.
Private Member Functions
bool	adjacentCells (const fastjet::PseudoJet &jet1, const fastjet::PseudoJet &jet2, const std::vector< fastjet::PseudoJet > &cell_particles, const fastjet::ClusterSequence &theClusterSequence, double nCellMin) const
bool	decomposeJet (const fastjet::PseudoJet &theJet, const fastjet::ClusterSequence &theClusterSequence, const std::vector< fastjet::PseudoJet > &cell_particles, double ptHard, double nCellMin, double deltarcut, fastjet::PseudoJet &ja, fastjet::PseudoJet &jb, std::vector< fastjet::PseudoJet > &leftovers) const
Private Attributes
int	algorithm_
double	centralEtaCut_
std::vector< double >	deltarBins_
double	etFrac_
std::string	jetType_
edm::InputTag	mSrc_
std::vector< double >	nCellBins_
std::vector< double >	ptFracBins_
double	ptMin_
std::vector< double >	rBins_
double	seedThreshold_
std::vector< double >	sumEtBins_
double	sumEtEtaCut_
int	useAdjacency_
bool	useMaxTower_
bool	verbose_

Detailed Description

Definition at line 44 of file CATopJetAlgorithm.h.

Constructor & Destructor Documentation

CATopJetAlgorithm::CATopJetAlgorithm	(	edm::InputTag	mSrc,
		bool	verbose,
		int	algorithm,
		int	useAdjacency,
		double	centralEtaCut,
		double	ptMin,
		const std::vector< double > &	sumEtBins,
		const std::vector< double > &	rBins,
		const std::vector< double > &	ptFracBins,
		const std::vector< double > &	deltarBins,
		const std::vector< double > &	nCellBins,
		double	seedThreshold,
		bool	useMaxTower,
		double	sumEtEtaCut,
		double	etFrac
	)		`[inline]`

Constructor

Definition at line 48 of file CATopJetAlgorithm.h.

                                   :
    mSrc_          (mSrc          ),
    verbose_       (verbose       ),
    algorithm_     (algorithm     ),
    useAdjacency_  (useAdjacency  ),
    centralEtaCut_ (centralEtaCut ), 
    ptMin_         (ptMin         ),         
    sumEtBins_     (sumEtBins     ),        
    rBins_         (rBins         ),         
    ptFracBins_    (ptFracBins    ),  
    deltarBins_    (deltarBins    ),
    nCellBins_     (nCellBins     ),
    seedThreshold_ (seedThreshold ), 
    useMaxTower_   (useMaxTower   ),
    sumEtEtaCut_   (sumEtEtaCut   ),   
    etFrac_        (etFrac        )

      { }

Member Function Documentation

bool CATopJetAlgorithm::adjacentCells	(	const fastjet::PseudoJet &	jet1,
		const fastjet::PseudoJet &	jet2,
		const std::vector< fastjet::PseudoJet > &	cell_particles,
		const fastjet::ClusterSequence &	theClusterSequence,
		double	nCellMin
	)		const `[private]`

Definition at line 269 of file CATopJetAlgorithm.cc.

References abs, and reco::deltaPhi().

                                                                                                  {
        
        
        double eta1 = jet1.rapidity();
        double phi1 = jet1.phi();
        double eta2 = jet2.rapidity();
        double phi2 = jet2.phi();
        
        double deta = abs(eta2 - eta1) / 0.087;
        double dphi = fabs( reco::deltaPhi(phi2,phi1) ) / 0.087;
        
        return ( ( deta + dphi ) <= nCellMin );
}

bool CATopJetAlgorithm::decomposeJet	(	const fastjet::PseudoJet &	theJet,
		const fastjet::ClusterSequence &	theClusterSequence,
		const std::vector< fastjet::PseudoJet > &	cell_particles,
		double	ptHard,
		double	nCellMin,
		double	deltarcut,
		fastjet::PseudoJet &	ja,
		fastjet::PseudoJet &	jb,
		std::vector< fastjet::PseudoJet > &	leftovers
	)		const `[private]`

Adjacency Requirement ///

Pt Fraction Requirement ///

Definition at line 291 of file CATopJetAlgorithm.cc.

References gather_cfg::cout, SiPixelRawToDigiRegional_cfi::deltaPhi, deltaR(), and j.

                                                                                                                     {
        
        bool goodBreak;
        fastjet::PseudoJet j = theJet;
        double InputObjectPt = j.perp();
        if ( verbose_ )cout<<"Input Object Pt = "<<InputObjectPt<<endl;
        if ( verbose_ )cout<<"ptHard = "<<ptHard<<endl;
        leftovers.clear();
        if ( verbose_ )cout<<"start while loop"<<endl;
        
        while (1) {                                                      // watch out for infinite loop!
                goodBreak = theClusterSequence.has_parents(j,ja,jb);
                if (!goodBreak){
                        if ( verbose_ )cout<<"bad break. this is one cell. can't decluster anymore."<<endl;
                        break;         // this is one cell, can't decluster anymore
                }
                
                if ( verbose_ )cout<<"good break. ja Pt = "<<ja.perp()<<" jb Pt = "<<jb.perp()<<endl;
                
                
                // check if clusters are adjacent using a constant deltar adjacency.
                double clusters_deltar=fabs(ja.eta()-jb.eta())+fabs(deltaPhi(ja.phi(),jb.phi()));
                
                if ( verbose_  && useAdjacency_ ==1)cout<<"clusters_deltar = "<<clusters_deltar<<endl;
                if ( verbose_  && useAdjacency_ ==1)cout<<"deltar cut = "<<deltarcut<<endl;
                
                if ( useAdjacency_==1 && clusters_deltar < deltarcut){
                        if ( verbose_ )cout<<"clusters too close. consant adj. break."<<endl;
                        break;
                } 
                
                // Check if clusters are adjacent using a DeltaR adjacency which is a function of pT.
                double clusters_deltaR=deltaR( ja.rapidity(), ja.phi(), jb.rapidity(), jb.phi() );
                
                if ( verbose_  && useAdjacency_ ==2)cout<<"clusters_deltaR = "<<clusters_deltaR<<endl;
                if ( verbose_  && useAdjacency_ ==2)cout<<"0.4-0.0004*InputObjectPt = "<<0.4-0.0004*InputObjectPt<<endl;
                
                if ( useAdjacency_==2 && clusters_deltaR < 0.4-0.0004*InputObjectPt)
                {
                        if ( verbose_ )cout<<"clusters too close. modified adj. break."<<endl;
                        break;
                } 

                // Check if clusters are adjacent in the calorimeter. 
                if ( useAdjacency_==3 &&  adjacentCells(ja,jb,cell_particles,theClusterSequence,nCellMin) ){                  
                        if ( verbose_ )cout<<"clusters too close in the calorimeter. calorimeter adj. break."<<endl;
                        break;         // the clusters are "adjacent" in the calorimeter => shouldn't have decomposed
                }
                                
                if ( verbose_ )cout<<"clusters pass distance cut"<<endl;
                
                
                if ( verbose_ )cout<<"ptHard = "<<ptHard<<endl;
                
                if (ja.perp() < ptHard && jb.perp() < ptHard){
                        if ( verbose_ )cout<<"two soft clusters. dead end"<<endl;
                        break;         // broke into two soft clusters, dead end
                }
                
                if (ja.perp() > ptHard && jb.perp() > ptHard){
                        if ( verbose_ )cout<<"two hard clusters. done"<<endl;
                        return true;   // broke into two hard clusters, we're done!
                }
                
                else if (ja.perp() > jb.perp()) {                              // broke into one hard and one soft, ditch the soft one and try again
                        if ( verbose_ )cout<<"ja hard jb soft. try to split hard. j = ja"<<endl; 
                        j = ja;
                        vector<fastjet::PseudoJet> particles = theClusterSequence.constituents(jb);
                        leftovers.insert(leftovers.end(),particles.begin(),particles.end());
                }
                else {
                        if ( verbose_ )cout<<"ja hard jb soft. try to split hard. j = jb"<<endl; 
                        j = jb;
                        vector<fastjet::PseudoJet> particles = theClusterSequence.constituents(ja);
                        leftovers.insert(leftovers.end(),particles.begin(),particles.end());
                }
        }
        
        if ( verbose_ )cout<<"did not decluster."<<endl;  // did not decluster into hard subjets
        
        ja.reset(0,0,0,0);
        jb.reset(0,0,0,0);
        leftovers.clear();
        return false;
}

void CATopJetAlgorithm::run	(	const std::vector< fastjet::PseudoJet > &	cell_particles,
		std::vector< fastjet::PseudoJet > &	hardjetsOutput,
		boost::shared_ptr< fastjet::ClusterSequence > &	fjClusterSeq
	)