[d7d2da3] | 1 |
|
---|
| 2 | /** \class TauTagging
|
---|
| 3 | *
|
---|
| 4 | * Determines origin of jet,
|
---|
| 5 | * applies b-tagging efficiency (miss identification rate) formulas
|
---|
| 6 | * and sets b-tagging flags
|
---|
| 7 | *
|
---|
| 8 | * $Date$
|
---|
| 9 | * $Revision$
|
---|
| 10 | *
|
---|
| 11 | *
|
---|
| 12 | * \author P. Demin - UCL, Louvain-la-Neuve
|
---|
| 13 | *
|
---|
| 14 | */
|
---|
| 15 |
|
---|
| 16 | #include "modules/TauTagging.h"
|
---|
| 17 |
|
---|
| 18 | #include "classes/DelphesClasses.h"
|
---|
| 19 | #include "classes/DelphesFactory.h"
|
---|
| 20 | #include "classes/DelphesFormula.h"
|
---|
| 21 |
|
---|
| 22 | #include "ExRootAnalysis/ExRootResult.h"
|
---|
| 23 | #include "ExRootAnalysis/ExRootFilter.h"
|
---|
| 24 | #include "ExRootAnalysis/ExRootClassifier.h"
|
---|
| 25 |
|
---|
| 26 | #include "TMath.h"
|
---|
| 27 | #include "TString.h"
|
---|
| 28 | #include "TFormula.h"
|
---|
| 29 | #include "TRandom3.h"
|
---|
| 30 | #include "TObjArray.h"
|
---|
| 31 | #include "TDatabasePDG.h"
|
---|
| 32 | #include "TLorentzVector.h"
|
---|
| 33 |
|
---|
| 34 | #include <algorithm>
|
---|
| 35 | #include <stdexcept>
|
---|
| 36 | #include <iostream>
|
---|
| 37 | #include <sstream>
|
---|
| 38 |
|
---|
| 39 | using namespace std;
|
---|
| 40 |
|
---|
| 41 | //------------------------------------------------------------------------------
|
---|
| 42 |
|
---|
| 43 | class TauTaggingPartonClassifier : public ExRootClassifier
|
---|
| 44 | {
|
---|
| 45 | public:
|
---|
| 46 |
|
---|
| 47 | TauTaggingPartonClassifier(const TObjArray *array);
|
---|
| 48 |
|
---|
| 49 | Int_t GetCategory(TObject *object);
|
---|
| 50 |
|
---|
| 51 | Double_t fEtaMax, fPTMin;
|
---|
| 52 |
|
---|
| 53 | const TObjArray *fParticleInputArray;
|
---|
| 54 | };
|
---|
| 55 |
|
---|
| 56 | //------------------------------------------------------------------------------
|
---|
| 57 | TauTaggingPartonClassifier::TauTaggingPartonClassifier(const TObjArray *array) :
|
---|
| 58 | fParticleInputArray(array)
|
---|
| 59 | {
|
---|
| 60 | }
|
---|
| 61 |
|
---|
| 62 | //------------------------------------------------------------------------------
|
---|
| 63 |
|
---|
| 64 | Int_t TauTaggingPartonClassifier::GetCategory(TObject *object)
|
---|
| 65 | {
|
---|
| 66 | Candidate *tau = static_cast<Candidate *>(object);
|
---|
| 67 | Candidate *daughter = 0;
|
---|
| 68 | const TLorentzVector &momentum = tau->Momentum;
|
---|
| 69 | Int_t pdgCode, i;
|
---|
| 70 |
|
---|
| 71 | pdgCode = TMath::Abs(tau->PID);
|
---|
| 72 | if(pdgCode != 15) return -1;
|
---|
| 73 |
|
---|
| 74 | if(momentum.Pt() <= fPTMin || TMath::Abs(momentum.Eta()) > fEtaMax) return -1;
|
---|
| 75 |
|
---|
| 76 | if(tau->D1 < 0) return -1;
|
---|
| 77 |
|
---|
[6c565cc] | 78 | if(tau->D1 >= fParticleInputArray->GetEntriesFast() ||
|
---|
| 79 | tau->D2 >= fParticleInputArray->GetEntriesFast())
|
---|
| 80 | {
|
---|
| 81 | throw runtime_error("tau's daughter index is greater than the ParticleInputArray size");
|
---|
| 82 | }
|
---|
| 83 |
|
---|
[d7d2da3] | 84 | for(i = tau->D1; i <= tau->D2; ++i)
|
---|
| 85 | {
|
---|
| 86 | daughter = static_cast<Candidate *>(fParticleInputArray->At(i));
|
---|
| 87 | pdgCode = TMath::Abs(daughter->PID);
|
---|
| 88 | if(pdgCode == 11 || pdgCode == 13 || pdgCode == 15 || pdgCode == 24) return -1;
|
---|
| 89 | }
|
---|
| 90 |
|
---|
| 91 | return 0;
|
---|
| 92 | }
|
---|
| 93 |
|
---|
| 94 | //------------------------------------------------------------------------------
|
---|
| 95 |
|
---|
| 96 | TauTagging::TauTagging() :
|
---|
| 97 | fClassifier(0), fFilter(0),
|
---|
| 98 | fItPartonInputArray(0), fItJetInputArray(0)
|
---|
| 99 | {
|
---|
| 100 | }
|
---|
| 101 |
|
---|
| 102 | //------------------------------------------------------------------------------
|
---|
| 103 |
|
---|
| 104 | TauTagging::~TauTagging()
|
---|
| 105 | {
|
---|
| 106 | }
|
---|
| 107 |
|
---|
| 108 | //------------------------------------------------------------------------------
|
---|
| 109 |
|
---|
| 110 | void TauTagging::Init()
|
---|
| 111 | {
|
---|
| 112 | map< Int_t, DelphesFormula * >::iterator itEfficiencyMap;
|
---|
| 113 | ExRootConfParam param;
|
---|
| 114 | DelphesFormula *formula;
|
---|
| 115 | Int_t i, size;
|
---|
| 116 |
|
---|
| 117 | fDeltaR = GetDouble("DeltaR", 0.5);
|
---|
| 118 |
|
---|
| 119 | // read efficiency formulas
|
---|
| 120 | param = GetParam("EfficiencyFormula");
|
---|
| 121 | size = param.GetSize();
|
---|
| 122 |
|
---|
| 123 | fEfficiencyMap.clear();
|
---|
| 124 | for(i = 0; i < size/2; ++i)
|
---|
| 125 | {
|
---|
| 126 | formula = new DelphesFormula;
|
---|
| 127 | formula->Compile(param[i*2 + 1].GetString());
|
---|
| 128 |
|
---|
| 129 | fEfficiencyMap[param[i*2].GetInt()] = formula;
|
---|
| 130 | }
|
---|
| 131 |
|
---|
| 132 | // set default efficiency formula
|
---|
| 133 | itEfficiencyMap = fEfficiencyMap.find(0);
|
---|
| 134 | if(itEfficiencyMap == fEfficiencyMap.end())
|
---|
| 135 | {
|
---|
| 136 | formula = new DelphesFormula;
|
---|
| 137 | formula->Compile("0.0");
|
---|
| 138 |
|
---|
| 139 | fEfficiencyMap[0] = formula;
|
---|
| 140 | }
|
---|
| 141 |
|
---|
| 142 | // import input array(s)
|
---|
| 143 |
|
---|
| 144 | fParticleInputArray = ImportArray(GetString("ParticleInputArray", "Delphes/allParticles"));
|
---|
| 145 |
|
---|
| 146 | fClassifier = new TauTaggingPartonClassifier(fParticleInputArray);
|
---|
| 147 | fClassifier->fPTMin = GetDouble("TauPTMin", 1.0);
|
---|
| 148 | fClassifier->fEtaMax = GetDouble("TauEtaMax", 2.5);
|
---|
| 149 |
|
---|
| 150 | fPartonInputArray = ImportArray(GetString("PartonInputArray", "Delphes/partons"));
|
---|
| 151 | fItPartonInputArray = fPartonInputArray->MakeIterator();
|
---|
| 152 |
|
---|
| 153 | fFilter = new ExRootFilter(fPartonInputArray);
|
---|
| 154 |
|
---|
| 155 | fJetInputArray = ImportArray(GetString("JetInputArray", "FastJetFinder/jets"));
|
---|
| 156 | fItJetInputArray = fJetInputArray->MakeIterator();
|
---|
| 157 | }
|
---|
| 158 |
|
---|
| 159 | //------------------------------------------------------------------------------
|
---|
| 160 |
|
---|
| 161 | void TauTagging::Finish()
|
---|
| 162 | {
|
---|
| 163 | map< Int_t, DelphesFormula * >::iterator itEfficiencyMap;
|
---|
| 164 | DelphesFormula *formula;
|
---|
| 165 |
|
---|
| 166 | if(fFilter) delete fFilter;
|
---|
| 167 | if(fClassifier) delete fClassifier;
|
---|
| 168 | if(fItJetInputArray) delete fItJetInputArray;
|
---|
| 169 | if(fItPartonInputArray) delete fItPartonInputArray;
|
---|
| 170 |
|
---|
| 171 | for(itEfficiencyMap = fEfficiencyMap.begin(); itEfficiencyMap != fEfficiencyMap.end(); ++itEfficiencyMap)
|
---|
| 172 | {
|
---|
| 173 | formula = itEfficiencyMap->second;
|
---|
| 174 | if(formula) delete formula;
|
---|
| 175 | }
|
---|
| 176 | }
|
---|
| 177 |
|
---|
| 178 | //------------------------------------------------------------------------------
|
---|
| 179 |
|
---|
| 180 | void TauTagging::Process()
|
---|
| 181 | {
|
---|
[f229d8a] | 182 | Candidate *jet, *tau, *daughter;
|
---|
| 183 | TLorentzVector tauMomentum;
|
---|
[d7d2da3] | 184 | Double_t pt, eta, phi;
|
---|
| 185 | TObjArray *tauArray;
|
---|
| 186 | map< Int_t, DelphesFormula * >::iterator itEfficiencyMap;
|
---|
| 187 | DelphesFormula *formula;
|
---|
[f229d8a] | 188 | Int_t pdgCode, charge, i;
|
---|
[d7d2da3] | 189 |
|
---|
| 190 | // select taus
|
---|
| 191 | fFilter->Reset();
|
---|
| 192 | tauArray = fFilter->GetSubArray(fClassifier, 0);
|
---|
| 193 |
|
---|
| 194 | if(tauArray == 0) return;
|
---|
| 195 |
|
---|
| 196 | TIter itTauArray(tauArray);
|
---|
| 197 |
|
---|
| 198 | // loop over all input jets
|
---|
| 199 | fItJetInputArray->Reset();
|
---|
| 200 | while((jet = static_cast<Candidate *>(fItJetInputArray->Next())))
|
---|
| 201 | {
|
---|
| 202 | const TLorentzVector &jetMomentum = jet->Momentum;
|
---|
| 203 | pdgCode = 0;
|
---|
| 204 | charge = gRandom->Uniform() > 0.5 ? 1 : -1;
|
---|
| 205 | eta = jetMomentum.Eta();
|
---|
| 206 | phi = jetMomentum.Phi();
|
---|
| 207 | pt = jetMomentum.Pt();
|
---|
| 208 |
|
---|
| 209 | // loop over all input taus
|
---|
| 210 | itTauArray.Reset();
|
---|
| 211 | while((tau = static_cast<Candidate *>(itTauArray.Next())))
|
---|
| 212 | {
|
---|
[7eccbe7] | 213 | if(tau->D1 < 0) continue;
|
---|
| 214 |
|
---|
| 215 | if(tau->D1 >= fParticleInputArray->GetEntriesFast() ||
|
---|
| 216 | tau->D2 >= fParticleInputArray->GetEntriesFast())
|
---|
| 217 | {
|
---|
| 218 | throw runtime_error("tau's daughter index is greater than the ParticleInputArray size");
|
---|
| 219 | }
|
---|
| 220 |
|
---|
[f229d8a] | 221 | tauMomentum.SetPxPyPzE(0.0, 0.0, 0.0, 0.0);
|
---|
[7eccbe7] | 222 |
|
---|
[f229d8a] | 223 | for(i = tau->D1; i <= tau->D2; ++i)
|
---|
| 224 | {
|
---|
| 225 | daughter = static_cast<Candidate *>(fParticleInputArray->At(i));
|
---|
| 226 | if(TMath::Abs(daughter->PID) == 16) continue;
|
---|
| 227 | tauMomentum += daughter->Momentum;
|
---|
| 228 | }
|
---|
[7eccbe7] | 229 |
|
---|
[f229d8a] | 230 | if(jetMomentum.DeltaR(tauMomentum) <= fDeltaR)
|
---|
[d7d2da3] | 231 | {
|
---|
| 232 | pdgCode = 15;
|
---|
| 233 | charge = tau->Charge;
|
---|
| 234 | }
|
---|
| 235 | }
|
---|
| 236 | // find an efficency formula
|
---|
| 237 | itEfficiencyMap = fEfficiencyMap.find(pdgCode);
|
---|
| 238 | if(itEfficiencyMap == fEfficiencyMap.end())
|
---|
| 239 | {
|
---|
| 240 | itEfficiencyMap = fEfficiencyMap.find(0);
|
---|
| 241 | }
|
---|
| 242 | formula = itEfficiencyMap->second;
|
---|
| 243 |
|
---|
| 244 | // apply an efficency formula
|
---|
| 245 | jet->TauTag = gRandom->Uniform() <= formula->Eval(pt, eta);
|
---|
| 246 | // set tau charge
|
---|
| 247 | jet->Charge = charge;
|
---|
| 248 | }
|
---|
| 249 | }
|
---|
| 250 |
|
---|
| 251 | //------------------------------------------------------------------------------
|
---|