| [d7d2da3] | 1 |
|
|---|
| 2 | /** \class JetPileUpSubtractor
|
|---|
| 3 | *
|
|---|
| 4 | * Subtract pile-up contribution from jets using the fastjet area method
|
|---|
| 5 | *
|
|---|
| 6 | * $Date: 2012-11-18 15:57:08 +0100 (Sun, 18 Nov 2012) $
|
|---|
| 7 | * $Revision: 814 $
|
|---|
| 8 | *
|
|---|
| 9 | * \author M. Selvaggi - UCL, Louvain-la-Neuve
|
|---|
| 10 | *
|
|---|
| 11 | */
|
|---|
| 12 |
|
|---|
| 13 | #include "modules/JetPileUpSubtractor.h"
|
|---|
| 14 |
|
|---|
| 15 | #include "classes/DelphesClasses.h"
|
|---|
| 16 | #include "classes/DelphesFactory.h"
|
|---|
| 17 | #include "classes/DelphesFormula.h"
|
|---|
| 18 |
|
|---|
| 19 | #include "ExRootAnalysis/ExRootResult.h"
|
|---|
| 20 | #include "ExRootAnalysis/ExRootFilter.h"
|
|---|
| 21 | #include "ExRootAnalysis/ExRootClassifier.h"
|
|---|
| 22 |
|
|---|
| 23 | #include "TMath.h"
|
|---|
| 24 | #include "TString.h"
|
|---|
| 25 | #include "TFormula.h"
|
|---|
| 26 | #include "TRandom3.h"
|
|---|
| 27 | #include "TObjArray.h"
|
|---|
| 28 | #include "TDatabasePDG.h"
|
|---|
| 29 | #include "TLorentzVector.h"
|
|---|
| 30 |
|
|---|
| 31 | #include <algorithm>
|
|---|
| 32 | #include <stdexcept>
|
|---|
| 33 | #include <iostream>
|
|---|
| 34 | #include <sstream>
|
|---|
| 35 |
|
|---|
| 36 | using namespace std;
|
|---|
| 37 |
|
|---|
| 38 | //------------------------------------------------------------------------------
|
|---|
| 39 |
|
|---|
| 40 | JetPileUpSubtractor::JetPileUpSubtractor() :
|
|---|
| 41 | fItJetInputArray(0)
|
|---|
| 42 | {
|
|---|
| 43 |
|
|---|
| 44 | }
|
|---|
| 45 |
|
|---|
| 46 | //------------------------------------------------------------------------------
|
|---|
| 47 |
|
|---|
| 48 | JetPileUpSubtractor::~JetPileUpSubtractor()
|
|---|
| 49 | {
|
|---|
| 50 |
|
|---|
| 51 | }
|
|---|
| 52 |
|
|---|
| 53 | //------------------------------------------------------------------------------
|
|---|
| 54 |
|
|---|
| 55 | void JetPileUpSubtractor::Init()
|
|---|
| 56 | {
|
|---|
| 57 | fJetPTMin = GetDouble("JetPTMin", 20.0);
|
|---|
| 58 |
|
|---|
| 59 | // import input array(s)
|
|---|
| 60 |
|
|---|
| 61 | fJetInputArray = ImportArray(GetString("JetInputArray", "FastJetFinder/jets"));
|
|---|
| 62 | fItJetInputArray = fJetInputArray->MakeIterator();
|
|---|
| 63 |
|
|---|
| 64 | fRhoInputArray = ImportArray(GetString("RhoInputArray", "Rho/rho"));
|
|---|
| 65 |
|
|---|
| 66 | // create output array(s)
|
|---|
| 67 |
|
|---|
| 68 | fOutputArray = ExportArray(GetString("OutputArray", "jets"));
|
|---|
| 69 |
|
|---|
| 70 | }
|
|---|
| 71 |
|
|---|
| 72 | //------------------------------------------------------------------------------
|
|---|
| 73 |
|
|---|
| 74 | void JetPileUpSubtractor::Finish()
|
|---|
| 75 | {
|
|---|
| 76 | if(fItJetInputArray) delete fItJetInputArray;
|
|---|
| 77 | }
|
|---|
| 78 |
|
|---|
| 79 | //------------------------------------------------------------------------------
|
|---|
| 80 |
|
|---|
| 81 | void JetPileUpSubtractor::Process()
|
|---|
| 82 | {
|
|---|
| 83 | Candidate *candidate;
|
|---|
| 84 | TLorentzVector momentum, area;
|
|---|
| 85 | Double_t rho = 0.0;
|
|---|
| 86 |
|
|---|
| 87 | if(fRhoInputArray && fRhoInputArray->GetEntriesFast() > 0)
|
|---|
| 88 | {
|
|---|
| 89 | candidate = static_cast<Candidate*>(fRhoInputArray->At(0));
|
|---|
| 90 | rho = candidate->Momentum.Pt();
|
|---|
| 91 | }
|
|---|
| 92 |
|
|---|
| 93 | // loop over all input candidates
|
|---|
| 94 | fItJetInputArray->Reset();
|
|---|
| 95 | while((candidate = static_cast<Candidate*>(fItJetInputArray->Next())))
|
|---|
| 96 | {
|
|---|
| 97 | momentum = candidate->Momentum;
|
|---|
| 98 | area = candidate->Area;
|
|---|
| 99 |
|
|---|
| 100 | // apply pile-up correction
|
|---|
| 101 | if(momentum.Pt() <= rho * area.Pt()) continue;
|
|---|
| 102 |
|
|---|
| 103 | momentum -= rho * area;
|
|---|
| 104 |
|
|---|
| 105 | if(momentum.Pt() <= fJetPTMin) continue;
|
|---|
| 106 |
|
|---|
| 107 | candidate = static_cast<Candidate*>(candidate->Clone());
|
|---|
| 108 | candidate->Momentum = momentum;
|
|---|
| 109 |
|
|---|
| 110 | fOutputArray->Add(candidate);
|
|---|
| 111 | }
|
|---|
| 112 | }
|
|---|
| 113 |
|
|---|
| 114 | //------------------------------------------------------------------------------
|
|---|
