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fastjet::D0RunIIConePlugin Class Reference

Implementation of the D0 Run II Cone (plugin for fastjet v2.1 upwards) More...

#include <fastjet/D0RunIIConePlugin.hh>

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Public Member Functions

 D0RunIIConePlugin (double cone_radius_in, double min_jet_Et_in, double split_ratio_in=_DEFAULT_split_ratio)
 A D0RunIIConePlugin constructor which sets the "free" parameters of the algorithm: More...
 
double cone_radius () const
 
double min_jet_Et () const
 
double split_ratio () const
 
double far_ratio () const
 
double Et_min_ratio () const
 
bool kill_duplicate () const
 
double duplicate_dR () const
 
double duplicate_dPT () const
 
double search_factor () const
 
double pT_min_leading_protojet () const
 
double pT_min_second_protojet () const
 
int merge_max () const
 
double pT_min_nomerge () const
 
double overlap_threshold () const
 access the split_ratio() also by the name overlap_threshold()
 
virtual std::string description () const
 return a textual description of the jet-definition implemented in this plugin
 
virtual void run_clustering (ClusterSequence &) const
 given a ClusterSequence that has been filled up with initial particles, the following function should fill up the rest of the ClusterSequence, using the following member functions of ClusterSequence: More...
 
virtual double R () const
 the plugin mechanism's standard way of accessing the jet radius
 
- Public Member Functions inherited from fastjet::JetDefinition::Plugin
virtual bool supports_ghosted_passive_areas () const
 return true if there is specific support for the measurement of passive areas, in the sense that areas determined from all particles below the ghost separation scale will be a passive area. More...
 
virtual void set_ghost_separation_scale (double scale) const
 set the ghost separation scale for passive area determinations in future runs (strictly speaking that makes the routine a non const, so related internal info must be stored as a mutable)
 
virtual double ghost_separation_scale () const
 
virtual bool exclusive_sequence_meaningful () const
 if this returns false then a warning will be given whenever the user requests "exclusive" jets from the cluster sequence
 
virtual bool is_spherical () const
 returns true if the plugin implements an algorithm intended for use on a spherical geometry (e.g. More...
 
virtual ~Plugin ()
 a destructor to be replaced if necessary in derived classes...
 

Detailed Description

Implementation of the D0 Run II Cone (plugin for fastjet v2.1 upwards)

D0RunIIConePlugin is a plugin for fastjet (v2.1 upwards) that provides an interface to the D0 version of Run-II iterative cone algorithm with midpoint seeds (also known as the Iterative Legacy Cone Algorithm, ILCA).

The D0 code has been taken from Lars Sonnenschein's web-space http://www-d0.fnal.gov/~sonne/D0RunIIcone.tgz

The version of the D0 Run II code distributed here has been modified by the FastJet authors, so as to provide access to the contents of the jets (as is necessary for the plugin). This does not modify the results of the clustering.

Definition at line 60 of file D0RunIIConePlugin.hh.

Constructor & Destructor Documentation

fastjet::D0RunIIConePlugin::D0RunIIConePlugin ( double  cone_radius_in,
double  min_jet_Et_in,
double  split_ratio_in = _DEFAULT_split_ratio 
)
inline

A D0RunIIConePlugin constructor which sets the "free" parameters of the algorithm:

  • the cone_radius has the usual meaning
  • the min_jet_Et causes cones to be discarded at if at any iteration they have pt < Et_min_ratio * min_jet_Et. Two values have been used by D0 for min_jet_Et: 8 GeV in earlier Run II publicatinos, 6 GeV in later publications
  • split_ratio is equivalent to the overlap threshold during the split/merge step. Default: 0.5.

The remaining parameters of the algorithm are not to be modified if the algorithm is to correspond to the one actually used by D0.

Definition at line 80 of file D0RunIIConePlugin.hh.

Member Function Documentation

void fastjet::D0RunIIConePlugin::run_clustering ( ClusterSequence ) const
virtual

given a ClusterSequence that has been filled up with initial particles, the following function should fill up the rest of the ClusterSequence, using the following member functions of ClusterSequence:

  • plugin_do_ij_recombination(...)
  • plugin_do_iB_recombination(...)

Implements fastjet::JetDefinition::Plugin.

Definition at line 72 of file D0RunIIConePlugin.cc.


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