1 | |
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2 | /** \class EnergySmearing |
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3 | * |
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4 | * Performs energy resolution smearing. |
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5 | * |
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6 | * $Date: 2012-11-19 14:05:19 +0100 (Mon, 19 Nov 2012) $ |
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7 | * $Revision: 829 $ |
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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/EnergySmearing.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 | |
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37 | using namespace std; |
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38 | |
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39 | //------------------------------------------------------------------------------ |
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40 | |
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41 | EnergySmearing::EnergySmearing() : |
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42 | fItInputArray(0) |
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43 | { |
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44 | } |
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45 | |
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46 | //------------------------------------------------------------------------------ |
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47 | |
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48 | EnergySmearing::~EnergySmearing() |
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49 | { |
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50 | } |
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51 | |
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52 | //------------------------------------------------------------------------------ |
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53 | |
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54 | void EnergySmearing::Init() |
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55 | { |
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56 | map< Int_t, DelphesFormula * >::iterator itFormulaMap; |
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57 | ExRootConfParam param; |
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58 | DelphesFormula *formula; |
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59 | Int_t i, size; |
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60 | |
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61 | // read resolution formulas |
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62 | param = GetParam("ResolutionFormula"); |
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63 | size = param.GetSize(); |
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64 | |
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65 | fFormulaMap.clear(); |
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66 | for(i = 0; i < size/2; ++i) |
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67 | { |
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68 | formula = new DelphesFormula; |
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69 | formula->Compile(param[i*2 + 1].GetString()); |
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70 | |
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71 | fFormulaMap[param[i*2].GetInt()] = formula; |
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72 | } |
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73 | |
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74 | // set default Resolution formula |
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75 | itFormulaMap = fFormulaMap.find(0); |
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76 | if(itFormulaMap == fFormulaMap.end()) |
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77 | { |
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78 | formula = new DelphesFormula; |
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79 | formula->Compile("0.0"); |
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80 | |
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81 | fFormulaMap[0] = formula; |
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82 | } |
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83 | |
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84 | // import array with output from filter/classifier module |
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85 | |
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86 | fInputArray = ImportArray(GetString("InputArray", "ParticlePropagator/candidates")); |
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87 | fItInputArray = fInputArray->MakeIterator(); |
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88 | |
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89 | // create output arrays |
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90 | |
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91 | fOutputArray = ExportArray(GetString("OutputArray", "candidates")); |
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92 | } |
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93 | |
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94 | //------------------------------------------------------------------------------ |
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95 | |
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96 | void EnergySmearing::Finish() |
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97 | { |
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98 | map< Int_t, DelphesFormula * >::iterator itFormulaMap; |
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99 | DelphesFormula *formula; |
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100 | |
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101 | if(fItInputArray) delete fItInputArray; |
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102 | |
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103 | for(itFormulaMap = fFormulaMap.begin(); itFormulaMap != fFormulaMap.end(); ++itFormulaMap) |
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104 | { |
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105 | formula = itFormulaMap->second; |
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106 | if(formula) delete formula; |
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107 | } |
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108 | } |
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109 | |
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110 | //------------------------------------------------------------------------------ |
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111 | |
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112 | void EnergySmearing::Process() |
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113 | { |
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114 | Candidate *candidate, *mother; |
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115 | Double_t energy, eta, phi; |
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116 | Int_t pdgCode; |
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117 | map< Int_t, DelphesFormula * >::iterator itEfficiencyMap, itFormulaMap; |
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118 | DelphesFormula *formula; |
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119 | |
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120 | fItInputArray->Reset(); |
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121 | while((candidate = static_cast<Candidate*>(fItInputArray->Next()))) |
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122 | { |
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123 | const TLorentzVector &candidatePosition = candidate->Position; |
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124 | const TLorentzVector &candidateMomentum = candidate->Momentum; |
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125 | pdgCode = TMath::Abs(candidate->PID); |
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126 | eta = candidatePosition.Eta(); |
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127 | phi = candidatePosition.Phi(); |
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128 | energy = candidateMomentum.E(); |
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129 | |
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130 | // find smearing formula |
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131 | itFormulaMap = fFormulaMap.find(pdgCode); |
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132 | if(itFormulaMap == fFormulaMap.end()) |
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133 | { |
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134 | itFormulaMap = fFormulaMap.find(0); |
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135 | } |
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136 | formula = itFormulaMap->second; |
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137 | |
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138 | // apply smearing formula |
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139 | energy = gRandom->Gaus(energy, formula->Eval(0.0, eta, 0.0, energy)); |
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140 | |
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141 | if(energy <= 0.0) continue; |
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142 | |
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143 | mother = candidate; |
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144 | candidate = static_cast<Candidate*>(candidate->Clone()); |
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145 | candidate->Momentum.SetE(energy); |
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146 | candidate->Mother = mother; |
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147 | |
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148 | fOutputArray->Add(candidate); |
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149 | } |
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150 | } |
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151 | |
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152 | //------------------------------------------------------------------------------ |
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