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FastJet 3.0.2
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FastJet 3.0.2
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Like ClusterSequence with computation of the active jet area. More...
#include <fastjet/ClusterSequenceActiveArea.hh>
Public Types | |
| enum | mean_pt_strategies { median = 0, non_ghost_median, pttot_over_areatot, pttot_over_areatot_cut, mean_ratio_cut, play, median_4vector } |
| enum providing a variety of tentative strategies for estimating the background (e.g. More... | |
Public Member Functions | |
| ClusterSequenceActiveArea () | |
| default constructor | |
| template<class L > | |
| ClusterSequenceActiveArea (const std::vector< L > &pseudojets, const JetDefinition &jet_def_in, const GhostedAreaSpec &ghost_spec, const bool &writeout_combinations=false) | |
| constructor based on JetDefinition and GhostedAreaSpec | |
| virtual double | area (const PseudoJet &jet) const |
| return the area associated with the given jet; this base class returns 0. | |
| virtual double | area_error (const PseudoJet &jet) const |
| return the error (uncertainty) associated with the determination of the area of this jet; this base class returns 0. | |
| virtual PseudoJet | area_4vector (const PseudoJet &jet) const |
| return a PseudoJet whose 4-vector is defined by the following integral | |
| double | pt_per_unit_area (mean_pt_strategies strat=median, double range=2.0) const |
| return the transverse momentum per unit area according to one of the above strategies; for some strategies (those with "cut" in their name) the parameter "range" allows one to exclude a subset of the jets for the background estimation, those that have pt/area > median(pt/area)*range. | |
| virtual double | empty_area (const Selector &selector) const |
| rewrite the empty area from the parent class, so as to use all info at our disposal return the total area, corresponding to a given Selector, that consists of ghost jets or unclustered ghosts | |
| virtual double | n_empty_jets (const Selector &selector) const |
| return the true number of empty jets (replaces ClusterSequenceAreaBase::n_empty_jets(...)) | |
Protected Member Functions | |
| void | _resize_and_zero_AA () |
| void | _initialise_AA (const JetDefinition &jet_def, const GhostedAreaSpec &ghost_spec, const bool &writeout_combinations, bool &continue_running) |
| void | _run_AA (const GhostedAreaSpec &ghost_spec) |
| void | _postprocess_AA (const GhostedAreaSpec &ghost_spec) |
| run the postprocessing for the active area (and derived classes) | |
| void | _initialise_and_run_AA (const JetDefinition &jet_def, const GhostedAreaSpec &ghost_spec, const bool &writeout_combinations=false) |
| does the initialisation and running specific to the active areas class | |
| void | _transfer_ghost_free_history (const ClusterSequenceActiveAreaExplicitGhosts &clust_seq) |
| transfer the history (and jet-momenta) from clust_seq to our own internal structure while removing ghosts | |
| void | _transfer_areas (const std::vector< int > &unique_hist_order, const ClusterSequenceActiveAreaExplicitGhosts &) |
| transfer areas from the ClusterSequenceActiveAreaExplicitGhosts object into our internal area bookkeeping... | |
| bool | has_dangerous_particles () const |
| returns true if there are any particles whose transverse momentum if so low that there's a risk of the ghosts having modified the clustering sequence | |
Protected Attributes | |
| std::valarray< double > | _average_area |
| child classes benefit from having these at their disposal | |
| std::valarray< double > | _average_area2 |
| std::valarray< PseudoJet > | _average_area_4vector |
Like ClusterSequence with computation of the active jet area.
Class that behaves essentially like ClusterSequence except that it also provides access to the area of a jet (which will be a random quantity... Figure out what to do about seeds later...)
This class should not be used directly. Rather use ClusterSequenceArea with the appropriate AreaDefinition
Definition at line 61 of file ClusterSequenceActiveArea.hh.
enum providing a variety of tentative strategies for estimating the background (e.g.
non-jet) activity in a highly populated event; the one that has been most extensively tested is median.
Definition at line 85 of file ClusterSequenceActiveArea.hh.
| virtual double fastjet::ClusterSequenceActiveArea::area | ( | const PseudoJet & | ) | const [inline, virtual] |
return the area associated with the given jet; this base class returns 0.
Reimplemented from fastjet::ClusterSequenceAreaBase.
Definition at line 74 of file ClusterSequenceActiveArea.hh.
| virtual double fastjet::ClusterSequenceActiveArea::area_error | ( | const PseudoJet & | ) | const [inline, virtual] |
return the error (uncertainty) associated with the determination of the area of this jet; this base class returns 0.
Reimplemented from fastjet::ClusterSequenceAreaBase.
Definition at line 76 of file ClusterSequenceActiveArea.hh.
| virtual PseudoJet fastjet::ClusterSequenceActiveArea::area_4vector | ( | const PseudoJet & | ) | const [inline, virtual] |
return a PseudoJet whose 4-vector is defined by the following integral
drap d PseudoJet("rap,phi,pt=one") * Theta("rap,phi inside jet boundary")
where PseudoJet("rap,phi,pt=one") is a 4-vector with the given rapidity (rap), azimuth (phi) and pt=1, while Theta("rap,phi inside jet boundary") is a function that is 1 when rap,phi define a direction inside the jet boundary and 0 otherwise.
This base class returns a null 4-vector.
Reimplemented from fastjet::ClusterSequenceAreaBase.
Definition at line 79 of file ClusterSequenceActiveArea.hh.
| double fastjet::ClusterSequenceActiveArea::pt_per_unit_area | ( | mean_pt_strategies | strat = median, |
| double | range = 2.0 |
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| ) | const |
return the transverse momentum per unit area according to one of the above strategies; for some strategies (those with "cut" in their name) the parameter "range" allows one to exclude a subset of the jets for the background estimation, those that have pt/area > median(pt/area)*range.
NB: This call is OBSOLETE; use media_pt_per_unit_area from the
Definition at line 274 of file ClusterSequenceActiveArea.cc.
| double fastjet::ClusterSequenceActiveArea::empty_area | ( | const Selector & | selector | ) | const [virtual] |
rewrite the empty area from the parent class, so as to use all info at our disposal return the total area, corresponding to a given Selector, that consists of ghost jets or unclustered ghosts
The selector passed as an argument needs to apply jet by jet.
Reimplemented from fastjet::ClusterSequenceAreaBase.
Reimplemented in fastjet::ClusterSequencePassiveArea.
Definition at line 443 of file ClusterSequenceActiveArea.cc.
| void fastjet::ClusterSequenceActiveArea::_initialise_and_run_AA | ( | const JetDefinition & | jet_def, |
| const GhostedAreaSpec & | ghost_spec, | ||
| const bool & | writeout_combinations = false |
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| ) | [protected] |
does the initialisation and running specific to the active areas class
global routine for running active area
Definition at line 51 of file ClusterSequenceActiveArea.cc.
| void fastjet::ClusterSequenceActiveArea::_transfer_areas | ( | const std::vector< int > & | unique_hist_order, |
| const ClusterSequenceActiveAreaExplicitGhosts & | |||
| ) | [protected] |
transfer areas from the ClusterSequenceActiveAreaExplicitGhosts object into our internal area bookkeeping...
Definition at line 564 of file ClusterSequenceActiveArea.cc.
1.7.4
