Implementation of the e+e- Jade algorithm (plugin for fastjet v2.4 upwards) More...

#include <fastjet/JadePlugin.hh>

Inheritance diagram for fastjet::JadePlugin:

Collaboration diagram for fastjet::JadePlugin:

Public Member Functions
	JadePlugin ()
	Main constructor for the Jade Plugin class.

	JadePlugin (const JadePlugin &plugin)
	copy constructor

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. More...

virtual bool	exclusive_sequence_meaningful () const
	avoid the warning whenever the user requests "exclusive" jets from the cluster sequence

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	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 e+e- Jade algorithm (plugin for fastjet v2.4 upwards)

JadePlugin is a plugin for fastjet (v2.4 upwards) It implements the JADE algorithm, which is an e+e- sequential recombination algorithm with interparticle distance

dij = 2 E_i E_j (1 - cos theta_ij)

or equivalently

yij = dij/E_{vis}^2

This corresponds to the distance measured used in

"Experimental Investigation of the Energy Dependence of the Strong Coupling Strength." JADE Collaboration (S. Bethke et al.) Phys.Lett.B213:235,1988

The JADE article carries out particle recombinations in the E-scheme (4-vector recombination), which is the default procedure for this plugin.

NOTE: other widely used schemes include E0, P, P0; however they also involve modifications to the distance measure. Be sure of what you're doing before running a JADE type algorithm.

To access the jets with a given ycut value (clustering stops once all yij > ycut), use

vector<PseudoJet> jets = cluster_sequence.exclusive_jets_ycut(ycut);

and related routines.

Definition at line 77 of file JadePlugin.hh.

Member Function Documentation

void fastjet::JadePlugin::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 88 of file JadePlugin.cc.

virtual double fastjet::JadePlugin::R ( ) const

inlinevirtual

the plugin mechanism's standard way of accessing the jet radius.

This must be set to return something sensible, even if R does not make sense for this algorithm!

Implements fastjet::JetDefinition::Plugin.

Definition at line 94 of file JadePlugin.hh.

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

plugins/Jade/fastjet/JadePlugin.hh
plugins/Jade/JadePlugin.cc

Public Member Functions

Detailed Description

Member Function Documentation