FastJet  3.0.3
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fastjet::RestFrameNSubjettinessTagger Class Reference

Class that helps perform 2-pronged boosted tagging using a reclustering in the jet's rest frame, supplemented with a cut on N-subjettiness (and a decay angle), as discussed by Ji-Hun Kim in arXiv:1011.1493. More...

#include <fastjet/tools/RestFrameNSubjettinessTagger.hh>

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Public Types

typedef
RestFrameNSubjettinessTaggerStructure 
StructureType
 the type of Structure returned
- Public Types inherited from fastjet::Transformer
typedef PseudoJetStructureBase StructureType
 A typedef that is needed to ensure that the PseudoJet::structure_of() template function works.

Public Member Functions

 RestFrameNSubjettinessTagger (const JetDefinition subjet_def, const double tau2cut=0.08, const double costhetascut=0.8, const bool use_exclusive=false)
 ctor with arguments (see the class description above)
virtual std::string description () const
 returns a textual description of the tagger
virtual PseudoJet result (const PseudoJet &jet) const
 runs the tagger on the given jet and returns the tagged PseudoJet if successful, a PseudoJet==0 otherwise (standard access is through operator()).
- Public Member Functions inherited from fastjet::Transformer
 Transformer ()
 default ctor
virtual ~Transformer ()
 default dtor
- Public Member Functions inherited from fastjet::FunctionOfPseudoJet< PseudoJet >
 FunctionOfPseudoJet ()
 default ctor
 FunctionOfPseudoJet (const PseudoJet &constant_value)
 ctor that creates a constant function
virtual ~FunctionOfPseudoJet ()
 default dtor (virtual to allow safe polymorphism)
PseudoJet operator() (const PseudoJet &pj) const
 apply the function using the "traditional" () operator.
std::vector< PseudoJetoperator() (const std::vector< PseudoJet > &pjs) const
 apply the function on a vector of PseudoJet, returning a vector of the results.

Protected Attributes

JetDefinition _subjet_def
double _t2cut
double _costscut
bool _use_exclusive

Detailed Description

Class that helps perform 2-pronged boosted tagging using a reclustering in the jet's rest frame, supplemented with a cut on N-subjettiness (and a decay angle), as discussed by Ji-Hun Kim in arXiv:1011.1493.

To tag a fat jet, the tagger proceeds as follows:

Note that in the original version, the jets to be tagged were reconstructed using SISCone with R=0.8 and f=0.75. Also, b-tagging was imposed on the 2 subjets found in the rest-frame tagging procedure.

Options

The constructor has the following arguments:

Input conditions

Output/interface

Definition at line 99 of file RestFrameNSubjettinessTagger.hh.

Member Function Documentation

PseudoJet fastjet::RestFrameNSubjettinessTagger::result ( const PseudoJet jet) const
virtual

runs the tagger on the given jet and returns the tagged PseudoJet if successful, a PseudoJet==0 otherwise (standard access is through operator()).

impose the cut on cos(theta_s)

Implements fastjet::Transformer.

Definition at line 57 of file RestFrameNSubjettinessTagger.cc.


The documentation for this class was generated from the following files: