1 | |
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2 | /** \class FastJetFinder |
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3 | * |
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4 | * Finds jets using FastJet library. |
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5 | * |
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6 | * $Date: 2013-05-24 01:26:33 +0200 (Fri, 24 May 2013) $ |
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7 | * $Revision: 1122 $ |
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8 | * |
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9 | * |
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10 | * \author P. Demin - UCL, Louvain-la-Neuve |
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11 | * |
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12 | */ |
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13 | |
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14 | #include "modules/FastJetFinder.h" |
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15 | |
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16 | #include "classes/DelphesClasses.h" |
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17 | #include "classes/DelphesFactory.h" |
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18 | #include "classes/DelphesFormula.h" |
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19 | |
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20 | #include "ExRootAnalysis/ExRootResult.h" |
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21 | #include "ExRootAnalysis/ExRootFilter.h" |
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22 | #include "ExRootAnalysis/ExRootClassifier.h" |
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23 | |
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24 | #include "TMath.h" |
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25 | #include "TString.h" |
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26 | #include "TFormula.h" |
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27 | #include "TRandom3.h" |
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28 | #include "TObjArray.h" |
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29 | #include "TDatabasePDG.h" |
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30 | #include "TLorentzVector.h" |
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31 | |
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32 | #include <algorithm> |
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33 | #include <stdexcept> |
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34 | #include <iostream> |
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35 | #include <sstream> |
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36 | #include <vector> |
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37 | |
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38 | #include "fastjet/PseudoJet.hh" |
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39 | #include "fastjet/JetDefinition.hh" |
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40 | #include "fastjet/ClusterSequence.hh" |
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41 | #include "fastjet/Selector.hh" |
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42 | #include "fastjet/ClusterSequenceArea.hh" |
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43 | #include "fastjet/tools/JetMedianBackgroundEstimator.hh" |
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44 | |
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45 | #include "fastjet/plugins/SISCone/fastjet/SISConePlugin.hh" |
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46 | #include "fastjet/plugins/CDFCones/fastjet/CDFMidPointPlugin.hh" |
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47 | #include "fastjet/plugins/CDFCones/fastjet/CDFJetCluPlugin.hh" |
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48 | |
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49 | using namespace std; |
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50 | using namespace fastjet; |
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51 | |
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52 | //------------------------------------------------------------------------------ |
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53 | |
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54 | FastJetFinder::FastJetFinder() : |
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55 | fPlugin(0), fDefinition(0), fAreaDefinition(0), fItInputArray(0) |
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56 | { |
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57 | |
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58 | } |
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59 | |
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60 | //------------------------------------------------------------------------------ |
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61 | |
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62 | FastJetFinder::~FastJetFinder() |
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63 | { |
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64 | |
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65 | } |
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66 | |
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67 | //------------------------------------------------------------------------------ |
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68 | |
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69 | void FastJetFinder::Init() |
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70 | { |
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71 | JetDefinition::Plugin *plugin = NULL; |
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72 | |
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73 | // define algorithm |
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74 | |
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75 | fJetAlgorithm = GetInt("JetAlgorithm", 6); |
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76 | fParameterR = GetDouble("ParameterR", 0.5); |
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77 | |
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78 | fConeRadius = GetDouble("ConeRadius", 0.5); |
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79 | fSeedThreshold = GetDouble("SeedThreshold", 1.0); |
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80 | fConeAreaFraction = GetDouble("ConeAreaFraction", 1.0); |
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81 | fMaxIterations = GetInt("MaxIterations", 100); |
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82 | fMaxPairSize = GetInt("MaxPairSize", 2); |
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83 | fIratch = GetInt("Iratch", 1); |
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84 | fAdjacencyCut = GetDouble("AdjacencyCut", 2.0); |
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85 | fOverlapThreshold = GetDouble("OverlapThreshold", 0.75); |
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86 | |
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87 | fJetPTMin = GetDouble("JetPTMin", 10.0); |
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88 | |
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89 | // --- Jet Area Parameters --- |
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90 | fAreaAlgorithm = GetInt("AreaAlgorithm", 0); |
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91 | fComputeRho = GetBool("ComputeRho", false); |
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92 | fRhoEtaMax = GetDouble("RhoEtaMax", 5.0); |
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93 | // - ghost based areas - |
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94 | fGhostEtaMax = GetDouble("GhostEtaMax", 5.0); |
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95 | fRepeat = GetInt("Repeat", 1); |
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96 | fGhostArea = GetDouble("GhostArea", 0.01); |
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97 | fGridScatter = GetDouble("GridScatter", 1.0); |
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98 | fPtScatter = GetDouble("PtScatter", 0.1); |
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99 | fMeanGhostPt = GetDouble("MeanGhostPt", 1.0E-100); |
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100 | // - voronoi based areas - |
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101 | fEffectiveRfact = GetDouble("EffectiveRfact", 1.0); |
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102 | |
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103 | switch(fAreaAlgorithm) |
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104 | { |
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105 | case 1: |
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106 | fAreaDefinition = new fastjet::AreaDefinition(active_area_explicit_ghosts, GhostedAreaSpec(fGhostEtaMax, fRepeat, fGhostArea, fGridScatter, fPtScatter, fMeanGhostPt)); |
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107 | break; |
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108 | case 2: |
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109 | fAreaDefinition = new fastjet::AreaDefinition(one_ghost_passive_area, GhostedAreaSpec(fGhostEtaMax, fRepeat, fGhostArea, fGridScatter, fPtScatter, fMeanGhostPt)); |
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110 | break; |
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111 | case 3: |
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112 | fAreaDefinition = new fastjet::AreaDefinition(passive_area, GhostedAreaSpec(fGhostEtaMax, fRepeat, fGhostArea, fGridScatter, fPtScatter, fMeanGhostPt)); |
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113 | break; |
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114 | case 4: |
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115 | fAreaDefinition = new fastjet::AreaDefinition(VoronoiAreaSpec(fEffectiveRfact)); |
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116 | break; |
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117 | case 5: |
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118 | fAreaDefinition = new fastjet::AreaDefinition(active_area, GhostedAreaSpec(fGhostEtaMax, fRepeat, fGhostArea, fGridScatter, fPtScatter, fMeanGhostPt)); |
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119 | break; |
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120 | default: |
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121 | case 0: |
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122 | fAreaDefinition = 0; |
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123 | break; |
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124 | } |
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125 | |
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126 | switch(fJetAlgorithm) |
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127 | { |
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128 | case 1: |
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129 | plugin = new fastjet::CDFJetCluPlugin(fSeedThreshold, fConeRadius, fAdjacencyCut, fMaxIterations, fIratch, fOverlapThreshold); |
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130 | fDefinition = new fastjet::JetDefinition(plugin); |
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131 | break; |
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132 | case 2: |
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133 | plugin = new fastjet::CDFMidPointPlugin(fSeedThreshold, fConeRadius, fConeAreaFraction, fMaxPairSize, fMaxIterations, fOverlapThreshold); |
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134 | fDefinition = new fastjet::JetDefinition(plugin); |
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135 | break; |
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136 | case 3: |
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137 | plugin = new fastjet::SISConePlugin(fConeRadius, fOverlapThreshold, fMaxIterations, fJetPTMin); |
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138 | fDefinition = new fastjet::JetDefinition(plugin); |
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139 | break; |
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140 | case 4: |
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141 | fDefinition = new fastjet::JetDefinition(fastjet::kt_algorithm, fParameterR); |
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142 | break; |
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143 | case 5: |
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144 | fDefinition = new fastjet::JetDefinition(fastjet::cambridge_algorithm, fParameterR); |
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145 | break; |
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146 | default: |
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147 | case 6: |
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148 | fDefinition = new fastjet::JetDefinition(fastjet::antikt_algorithm, fParameterR); |
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149 | break; |
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150 | } |
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151 | |
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152 | fPlugin = plugin; |
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153 | |
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154 | ClusterSequence::print_banner(); |
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155 | |
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156 | // import input array |
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157 | |
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158 | fInputArray = ImportArray(GetString("InputArray", "Calorimeter/towers")); |
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159 | fItInputArray = fInputArray->MakeIterator(); |
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160 | |
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161 | // create output arrays |
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162 | |
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163 | fOutputArray = ExportArray(GetString("OutputArray", "jets")); |
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164 | fRhoOutputArray = ExportArray(GetString("RhoOutputArray", "rho")); |
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165 | } |
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166 | |
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167 | //------------------------------------------------------------------------------ |
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168 | |
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169 | void FastJetFinder::Finish() |
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170 | { |
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171 | if(fItInputArray) delete fItInputArray; |
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172 | if(fDefinition) delete fDefinition; |
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173 | if(fAreaDefinition) delete fAreaDefinition; |
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174 | if(fPlugin) delete static_cast<JetDefinition::Plugin*>(fPlugin); |
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175 | } |
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176 | |
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177 | //------------------------------------------------------------------------------ |
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178 | |
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179 | void FastJetFinder::Process() |
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180 | { |
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181 | Candidate *candidate, *constituent; |
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182 | TLorentzVector momentum; |
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183 | Double_t deta, dphi, detaMax, dphiMax; |
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184 | Int_t number; |
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185 | Double_t rho = 0; |
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186 | PseudoJet jet, area; |
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187 | vector<PseudoJet> inputList, outputList; |
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188 | ClusterSequence *sequence; |
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189 | |
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190 | DelphesFactory *factory = GetFactory(); |
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191 | |
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192 | inputList.clear(); |
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193 | |
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194 | // loop over input objects |
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195 | fItInputArray->Reset(); |
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196 | number = 0; |
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197 | while((candidate = static_cast<Candidate*>(fItInputArray->Next()))) |
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198 | { |
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199 | momentum = candidate->Momentum; |
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200 | jet = PseudoJet(momentum.Px(), momentum.Py(), momentum.Pz(), momentum.E()); |
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201 | jet.set_user_index(number); |
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202 | inputList.push_back(jet); |
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203 | ++number; |
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204 | } |
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205 | |
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206 | // construct jets |
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207 | if(fAreaDefinition) |
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208 | { |
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209 | sequence = new ClusterSequenceArea(inputList, *fDefinition, *fAreaDefinition); |
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210 | } |
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211 | else |
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212 | { |
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213 | sequence = new ClusterSequence(inputList, *fDefinition); |
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214 | } |
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215 | |
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216 | // compute rho and store it |
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217 | if(fComputeRho && fAreaDefinition) |
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218 | { |
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219 | Selector select_rapidity = SelectorAbsRapMax(fRhoEtaMax); |
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220 | JetMedianBackgroundEstimator estimator(select_rapidity, *fDefinition, *fAreaDefinition); |
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221 | estimator.set_particles(inputList); |
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222 | rho = estimator.rho(); |
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223 | |
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224 | candidate = factory->NewCandidate(); |
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225 | candidate->Momentum.SetPtEtaPhiE(rho, 0.0, 0.0, rho); |
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226 | fRhoOutputArray->Add(candidate); |
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227 | } |
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228 | |
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229 | outputList.clear(); |
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230 | outputList = sorted_by_pt(sequence->inclusive_jets(fJetPTMin)); |
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231 | |
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232 | // loop over all jets and export them |
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233 | detaMax = 0.0; |
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234 | dphiMax = 0.0; |
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235 | vector<PseudoJet>::iterator itInputList, itOutputList; |
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236 | for(itOutputList = outputList.begin(); itOutputList != outputList.end(); ++itOutputList) |
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237 | { |
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238 | momentum.SetPxPyPzE(itOutputList->px(), itOutputList->py(), itOutputList->pz(), itOutputList->E()); |
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239 | area.reset(0.0, 0.0, 0.0, 0.0); |
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240 | if(fAreaDefinition) area = itOutputList->area_4vector(); |
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241 | |
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242 | candidate = factory->NewCandidate(); |
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243 | |
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244 | inputList.clear(); |
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245 | inputList = sequence->constituents(*itOutputList); |
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246 | for(itInputList = inputList.begin(); itInputList != inputList.end(); ++itInputList) |
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247 | { |
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248 | constituent = static_cast<Candidate*>(fInputArray->At(itInputList->user_index())); |
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249 | |
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250 | deta = TMath::Abs(momentum.Eta() - constituent->Momentum.Eta()); |
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251 | dphi = TMath::Abs(momentum.DeltaPhi(constituent->Momentum)); |
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252 | if(deta > detaMax) detaMax = deta; |
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253 | if(dphi > dphiMax) dphiMax = dphi; |
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254 | |
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255 | candidate->AddCandidate(constituent); |
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256 | } |
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257 | |
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258 | candidate->Momentum = momentum; |
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259 | candidate->Area.SetPxPyPzE(area.px(), area.py(), area.pz(), area.E()); |
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260 | |
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261 | candidate->DeltaEta = detaMax; |
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262 | candidate->DeltaPhi = dphiMax; |
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263 | |
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264 | fOutputArray->Add(candidate); |
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265 | } |
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266 | delete sequence; |
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267 | } |
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