| 1 | /*
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| 2 | * Delphes: a framework for fast simulation of a generic collider experiment
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| 3 | * Copyright (C) 2012-2014 Universite catholique de Louvain (UCL), Belgium
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| 4 | *
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| 5 | * This program is free software: you can redistribute it and/or modify
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| 6 | * it under the terms of the GNU General Public License as published by
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| 7 | * the Free Software Foundation, either version 3 of the License, or
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| 8 | * (at your option) any later version.
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| 9 | *
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| 10 | * This program is distributed in the hope that it will be useful,
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | * GNU General Public License for more details.
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| 14 | *
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| 15 | * You should have received a copy of the GNU General Public License
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| 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 17 | */
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| 18 |
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| 19 | /** \class CscClusterEfficiency
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| 20 | *
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| 21 | * This module is specific to the CMS paper searching for neutral LLPs in the CMS endcap muon detectors: https://arxiv.org/abs/2107.04838
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| 22 | * It is implemented based on the ClusterEfficiency parameterization function provided in the HEPData entry of the paper: https://www.hepdata.net/record/104408
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| 23 | *
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| 24 | * \author Christina Wang
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| 25 | *
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| 26 | */
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| 27 |
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| 28 | #include "modules/CscClusterEfficiency.h"
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| 29 |
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| 30 | #include "classes/DelphesClasses.h"
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| 31 | #include "classes/DelphesFactory.h"
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| 32 | #include "classes/DelphesCscClusterFormula.h"
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| 33 |
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| 34 | #include "ExRootAnalysis/ExRootClassifier.h"
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| 35 | #include "ExRootAnalysis/ExRootFilter.h"
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| 36 | #include "ExRootAnalysis/ExRootResult.h"
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| 37 |
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| 38 | #include "TDatabasePDG.h"
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| 39 | #include "TFormula.h"
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| 40 | #include "TLorentzVector.h"
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| 41 | #include "TMath.h"
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| 42 | #include "TObjArray.h"
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| 43 | #include "TRandom3.h"
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| 44 | #include "TString.h"
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| 45 |
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| 46 | #include <algorithm>
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| 47 | #include <iostream>
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| 48 | #include <sstream>
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| 49 | #include <stdexcept>
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| 50 |
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| 51 | using namespace std;
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| 52 |
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| 53 | //------------------------------------------------------------------------------
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| 54 |
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| 55 | CscClusterEfficiency::CscClusterEfficiency() :
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| 56 | fFormula(0), fItInputArray(0)
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| 57 | {
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| 58 | fFormula = new DelphesCscClusterFormula;
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| 59 | }
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| 60 |
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| 61 | //------------------------------------------------------------------------------
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| 62 |
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| 63 | CscClusterEfficiency::~CscClusterEfficiency()
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| 64 | {
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| 65 | if(fFormula) delete fFormula;
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| 66 | }
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| 67 |
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| 68 | //------------------------------------------------------------------------------
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| 69 |
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| 70 | void CscClusterEfficiency::Init()
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| 71 | {
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| 72 | // read CscClusterEfficiency formula
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| 73 | fFormula->Compile(GetString("EfficiencyFormula", "1.0"));
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| 74 |
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| 75 | // import input array
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| 76 |
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| 77 | fInputArray = ImportArray(GetString("InputArray", "ParticlePropagator/stableParticles"));
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| 78 | fItInputArray = fInputArray->MakeIterator();
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| 79 |
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| 80 | // create output array
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| 81 |
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| 82 | fOutputArray = ExportArray(GetString("OutputArray", "stableParticles"));
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| 83 | }
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| 84 |
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| 85 | //------------------------------------------------------------------------------
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| 86 |
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| 87 | void CscClusterEfficiency::Finish()
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| 88 | {
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| 89 | if(fItInputArray) delete fItInputArray;
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| 90 | }
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| 91 |
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| 92 | //------------------------------------------------------------------------------
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| 93 |
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| 94 | void CscClusterEfficiency::Process()
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| 95 | {
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| 96 | Candidate *candidate;
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| 97 | Double_t Ehad, Eem, decayR, decayZ;
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| 98 |
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| 99 | fItInputArray->Reset();
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| 100 | while((candidate = static_cast<Candidate *>(fItInputArray->Next())))
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| 101 | {
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| 102 | const TLorentzVector &candidateDecayPosition = candidate->DecayPosition;
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| 103 | decayZ = abs(candidateDecayPosition.Z());
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| 104 | decayR = sqrt(pow(candidateDecayPosition.X(),2)+pow(candidateDecayPosition.Y(),2));
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| 105 | Ehad = candidate->Ehad;
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| 106 | Eem = candidate->Eem;
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| 107 | // apply an efficency formula
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| 108 | if(gRandom->Uniform() > fFormula->Eval(decayR, decayZ, Ehad, Eem)) continue;
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| 109 |
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| 110 |
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| 111 | fOutputArray->Add(candidate);
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| 112 | }
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| 113 | }
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| 114 |
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| 115 | //------------------------------------------------------------------------------
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