Implementation of the e+e- Jade algorithm (plugin for fastjet v2.4 upwards) More...
#include <fastjet/JadePlugin.hh>
Public Types | |
| enum | Strategy { strategy_NNH = 0, strategy_NNFJN2Plain = 1 } |
| enum that contains the two clustering strategy options; for higher multiplicities, strategy_NNFJN2Plain is about a factor of two faster. More... | |
Public Member Functions | |
| JadePlugin (Strategy strategy=strategy_NNFJN2Plain) | |
| 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 Enumeration Documentation
◆ Strategy
enum that contains the two clustering strategy options; for higher multiplicities, strategy_NNFJN2Plain is about a factor of two faster.
Definition at line 82 of file JadePlugin.hh.
Member Function Documentation
◆ run_clustering()
|
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 210 of file JadePlugin.cc.
◆ R()
|
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 99 of file JadePlugin.hh.
The documentation for this class was generated from the following files:
- plugins/Jade/fastjet/JadePlugin.hh
- plugins/Jade/JadePlugin.cc
