| [53] | 1 | /*
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| 2 | * ---- Delphes ----
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| 3 | * A Fast Simulator for general purpose LHC detector
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| 4 | * S. Ovyn ~~~~ severine.ovyn@uclouvain.be
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| 5 | *
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| 6 | * Center for Particle Physics and Phenomenology (CP3)
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| 7 | * Universite Catholique de Louvain (UCL)
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| 8 | * Louvain-la-Neuve, Belgium
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| 9 | * */
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| 10 |
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| 11 | // \brief Trigger class, and some generic definitions
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| 12 |
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| 13 | #include "interface/JetUtils.h"
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| 14 |
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| 15 | using namespace std;
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| 16 |
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| 17 | JetsUtil::JetsUtil() {
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| 18 |
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| 19 | switch(JETALGO) {
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| 20 | default:
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| 21 | case 1: {
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| 22 |
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| 23 | // set up a CDF midpoint jet definition
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| 24 | #ifdef ENABLE_PLUGIN_CDFCONES
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| 25 | plugins = new fastjet::CDFJetCluPlugin(SEEDTHRESHOLD,CONERADIUS,C_ADJACENCYCUT,C_MAXITERATIONS,C_IRATCH,OVERLAPTHRESHOLD);
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| 26 | jet_def = fastjet::JetDefinition(plugins);
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| 27 | #else
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| 28 | plugins = NULL;
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| 29 | #endif
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| 30 | }
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| 31 | break;
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| 32 |
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| 33 | case 2: {
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| 34 | // set up a CDF midpoint jet definition
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| 35 | #ifdef ENABLE_PLUGIN_CDFCONES
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| 36 | plugins = new fastjet::CDFMidPointPlugin (SEEDTHRESHOLD,CONERADIUS,M_CONEAREAFRACTION,M_MAXPAIRSIZE,M_MAXITERATIONS,OVERLAPTHRESHOLD);
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| 37 | jet_def = fastjet::JetDefinition(plugins);
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| 38 | #else
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| 39 | plugins = NULL;
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| 40 | #endif
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| 41 | }
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| 42 | break;
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| 43 |
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| 44 | case 3: {
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| 45 | // set up a siscone jet definition
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| 46 | #ifdef ENABLE_PLUGIN_SISCONE
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| 47 | plugins = new fastjet::SISConePlugin (CONERADIUS,OVERLAPTHRESHOLD,NPASS, PROTOJET_PTMIN);
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| 48 | jet_def = fastjet::JetDefinition(plugins);
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| 49 | #else
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| 50 | plugins = NULL;
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| 51 | #endif
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| 52 | }
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| 53 | break;
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| 54 |
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| 55 | case 4: {
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| 56 | jet_def = fastjet::JetDefinition(fastjet::kt_algorithm, CONERADIUS);
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| 57 | }
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| 58 | break;
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| 59 |
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| 60 | case 5: {
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| 61 | jet_def = fastjet::JetDefinition(fastjet::cambridge_algorithm,CONERADIUS);
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| 62 | }
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| 63 | break;
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| 64 |
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| 65 | case 6: {
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| 66 | jet_def = fastjet::JetDefinition(fastjet::antikt_algorithm,CONERADIUS);
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| 67 | }
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| 68 | break;
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| 69 | }
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| 70 |
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| 71 | }
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| 72 |
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| 73 | vector<fastjet::PseudoJet> JetsUtil::RunJets(const vector<fastjet::PseudoJet> & input_particles)
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| 74 | {
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| 75 | inclusive_jets.clear();
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| 76 | sorted_jets.clear();
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| 77 |
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| 78 | // run the jet clustering with the above jet definition
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| 79 | if(input_particles.size()!=0)
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| 80 | {
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| 81 | fastjet::ClusterSequence clust_seq(input_particles, jet_def);
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| 82 | // extract the inclusive jets with pt > 5 GeV
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| 83 | double ptmin = 5.0;
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| 84 | inclusive_jets = clust_seq.inclusive_jets(ptmin);
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| 85 | // sort jets into increasing pt
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| 86 | sorted_jets = sorted_by_pt(inclusive_jets);
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| 87 | }
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| 88 |
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| 89 | return sorted_jets;
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| 90 | }
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| 91 |
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| 92 | void JetsUtil::RunJetBtagging(ExRootTreeWriter *treeWriter, ExRootTreeBranch *branchJet,const vector<fastjet::PseudoJet> & sorted_jets,const TSimpleArray<TRootGenParticle>& NFCentralQ)
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| 93 | {
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| 94 | TRootJet *elementJet;
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| 95 | TLorentzVector JET;
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| 96 | for (unsigned int i = 0; i < sorted_jets.size(); i++) {
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| 97 | JET.SetPxPyPzE(sorted_jets[i].px(),sorted_jets[i].py(),sorted_jets[i].pz(),sorted_jets[i].E());
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| 98 | if(JET.Pt() > JET_pt)
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| 99 | {
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| 100 | elementJet = (TRootJet*) branchJet->NewEntry();
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| 101 | elementJet->Set(JET);
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| 102 | // b-jets
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| 103 | bool btag=false;
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| 104 | if((fabs(JET.Eta()) < MAX_TRACKER && Btaggedjet(JET, NFCentralQ)))btag=true;
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| 105 | elementJet->Btag = btag;
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| 106 | }
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| 107 | } // for itJet : loop on all jets
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| 108 |
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| 109 | }
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| 110 |
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| 111 | void JetsUtil::RunTauJets(ExRootTreeWriter *treeWriter, ExRootTreeBranch *branchTauJet,const vector<fastjet::PseudoJet> & sorted_jets,const vector<PhysicsTower> & towers, const vector<TLorentzVector> & TrackCentral)
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| 112 | {
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| 113 | TRootTauJet *elementTauJet;
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| 114 | TLorentzVector JET;
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| 115 | for (unsigned int i = 0; i < sorted_jets.size(); i++) {
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| 116 | JET.SetPxPyPzE(sorted_jets[i].px(),sorted_jets[i].py(),sorted_jets[i].pz(),sorted_jets[i].E());
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| 117 | // Tau jet identification : 1! track and electromagnetic collimation
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| 118 | if(fabs(JET.Eta()) < (MAX_TRACKER - TAU_CONE_TRACKS)) {
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| 119 | double Energie_tau_central = EnergySmallCone(towers,JET.Eta(),JET.Phi());
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| 120 | if(
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| 121 | ( Energie_tau_central/JET.E() > TAU_EM_COLLIMATION ) &&
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| 122 | ( NumTracks(TrackCentral,PT_TRACK_TAU,JET.Eta(),JET.Phi()) == 1 ) &&
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| 123 | ( JET.Pt() > TAUJET_pt)
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| 124 | ) {
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| 125 | elementTauJet = (TRootTauJet*) branchTauJet->NewEntry();
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| 126 | elementTauJet->Set(JET);
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| 127 | } // if tau jet
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| 128 | } // if JET.eta < tracker - tau_cone : Tau jet identification
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| 129 |
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| 130 | } // for itJet : loop on all jets
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| 131 |
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| 132 |
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| 133 | }
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| 134 |
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