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fastjet::D0RunIConePlugin Class Reference

A plugin for FastJet (v3.0 or later) that provides an interface to the D0 version of Run-I cone algorithm. More...

#include <fastjet/D0RunIConePlugin.hh>

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Public Member Functions

 D0RunIConePlugin (double CONErad_in, double JETmne_in, double SPLifr_in=_DEFAULT_SPLifr)
 The D0RunIConePlugin constructor, which sets the "free" parameters of the algorithm: More...
 
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...
 
- Public Member Functions inherited from fastjet::D0RunIBaseConePlugin
 D0RunIBaseConePlugin (double CONErad_in, double JETmne_in, double SPLifr_in=_DEFAULT_SPLifr)
 A D0RunIConePlugin constructor which sets the "free" parameters of the algorithm: More...
 
double CONErad () const
 
double JETmne () const
 
double SPLifr () const
 
double TWOrad () const
 
bool D0_Angle () const
 
bool Increase_Delta_R () const
 
bool Kill_Far_Clusters () const
 
bool Jet_Et_Min_On_Iter () const
 
double Far_Ratio () const
 
double Eitem_Negdrop () const
 
double Et_Min_Ratio () const
 
double Thresh_Diff_Et () const
 
double overlap_threshold () const
 access the split_ratio() also by the name overlap_threshold()
 
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...
 

Additional Inherited Members

- Protected Member Functions inherited from fastjet::D0RunIBaseConePlugin
template<typename HepEntityType >
void run_clustering_worker (ClusterSequence &) const
 
- Protected Attributes inherited from fastjet::D0RunIBaseConePlugin
double _CONErad
 
double _JETmne
 
double _SPLifr
 
double _TWOrad
 
bool _D0_Angle
 
bool _Increase_Delta_R
 
bool _Kill_Far_Clusters
 
bool _Jet_Et_Min_On_Iter
 
double _Far_Ratio
 
double _Eitem_Negdrop
 
double _Et_Min_Ratio
 
double _Thresh_Diff_Et
 
- Static Protected Attributes inherited from fastjet::D0RunIBaseConePlugin
static const double _DEFAULT_SPLifr = 0.5
 
static const double _DEFAULT_TWOrad = 0.
 
static const bool _DEFAULT_D0_Angle = false
 
static const bool _DEFAULT_Increase_Delta_R = true
 
static const bool _DEFAULT_Kill_Far_Clusters = true
 
static const bool _DEFAULT_Jet_Et_Min_On_Iter = true
 
static const double _DEFAULT_Far_Ratio = 0.5
 
static const double _DEFAULT_Eitem_Negdrop = -1.0
 
static const double _DEFAULT_Et_Min_Ratio = 0.5
 
static const double _DEFAULT_Thresh_Diff_Et = 0.01
 

Detailed Description

A plugin for FastJet (v3.0 or later) that provides an interface to the D0 version of Run-I cone algorithm.

The D0 code has been obtained from Lars Sonnenschein's web-space http://www-d0.fnal.gov/~sonne/D0RunIcone.tgz

The version of the D0 Run I 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.

The difference between this algorithm and the post-1996 version relates to the way the final jet momenta are calculated. Details are to be found in FERMILAB-PUB-97-242-E.

Definition at line 62 of file D0RunIConePlugin.hh.

Constructor & Destructor Documentation

fastjet::D0RunIConePlugin::D0RunIConePlugin ( double  CONErad_in,
double  JETmne_in,
double  SPLifr_in = _DEFAULT_SPLifr 
)
inline

The D0RunIConePlugin constructor, which sets the "free" parameters of the algorithm:

Parameters
CONEradis the cone radius
JETmneis a minimum ET requirement on every iteration (jet dropped if Et < JETmne * Et_min_ratio ). The value that has been used by D0 for JETmne: 8 GeV (and Et_min_ratio is 0.5)
SPlifris the shared Et fraction splitting threshold, and a value of 0.5 was usually used by D0

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 D0RunIConePlugin.hh.

Member Function Documentation

void fastjet::D0RunIConePlugin::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::D0RunIBaseConePlugin.

Definition at line 215 of file D0RunIBaseConePlugin.cc.


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