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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/IdentifiedFinalState.hh"
#include "Rivet/Projections/VetoedFinalState.hh"
#include "Rivet/Projections/MissingMomentum.hh"
#include "Rivet/Projections/FastJets.hh"
#include "Rivet/Projections/DressedLeptons.hh"
#include "Rivet/Projections/LeadingParticlesFinalState.hh"
namespace Rivet {
/// ATLAS W + jets production at 7 TeV
class ATLAS_2012_I1083318 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(ATLAS_2012_I1083318);
/// @name Analysis methods
//@{
/// Book histograms and initialise projections before the run
void init() {
FinalState fs;
IdentifiedFinalState allleptons;
allleptons.acceptIdPair(PID::ELECTRON);
allleptons.acceptIdPair(PID::MUON);
Cut cuts = Cuts::abseta < 2.5 && Cuts::pT > 20*GeV;
DressedLeptons leptons(fs, allleptons, 0.1, cuts);
declare(leptons, "leptons");
// Leading neutrinos for Etmiss
LeadingParticlesFinalState neutrinos(fs);
neutrinos.addParticleIdPair(PID::NU_E);
neutrinos.addParticleIdPair(PID::NU_MU);
neutrinos.setLeadingOnly(true);
declare(neutrinos, "neutrinos");
// Input for the jets: "Neutrinos, electrons, and muons from decays of the
// massive W boson were not used"
VetoedFinalState veto;
veto.addVetoOnThisFinalState(leptons);
veto.addVetoOnThisFinalState(neutrinos);
FastJets jets(veto, FastJets::ANTIKT, 0.4, JetAlg::Muons::ALL, JetAlg::Invisibles::DECAY);
declare(jets, "jets");
for (size_t i = 0; i < 2; ++i) {
book(_h_NjetIncl[i] ,1, 1, i+1);
book(_h_RatioNjetIncl[i], 2, 1, i+1);
book(_h_FirstJetPt_1jet[i] ,3, 1, i+1);
book(_h_FirstJetPt_2jet[i] ,4, 1, i+1);
book(_h_FirstJetPt_3jet[i] ,5, 1, i+1);
book(_h_FirstJetPt_4jet[i] ,6, 1, i+1);
book(_h_SecondJetPt_2jet[i] ,7, 1, i+1);
book(_h_SecondJetPt_3jet[i] ,8, 1, i+1);
book(_h_SecondJetPt_4jet[i] ,9, 1, i+1);
book(_h_ThirdJetPt_3jet[i] ,10, 1, i+1);
book(_h_ThirdJetPt_4jet[i] ,11, 1, i+1);
book(_h_FourthJetPt_4jet[i] ,12, 1, i+1);
book(_h_Ht_1jet[i] ,13, 1, i+1);
book(_h_Ht_2jet[i] ,14, 1, i+1);
book(_h_Ht_3jet[i] ,15, 1, i+1);
book(_h_Ht_4jet[i] ,16, 1, i+1);
book(_h_Minv_2jet[i] ,17, 1, i+1);
book(_h_Minv_3jet[i] ,18, 1, i+1);
book(_h_Minv_4jet[i] ,19, 1, i+1);
book(_h_JetRapidity[i] ,20, 1, i+1);
book(_h_DeltaYElecJet[i] ,21, 1, i+1);
book(_h_SumYElecJet[i] ,22, 1, i+1);
book(_h_DeltaR_2jet[i] ,23, 1, i+1);
book(_h_DeltaY_2jet[i] ,24, 1, i+1);
book(_h_DeltaPhi_2jet[i] ,25, 1, i+1);
}
}
/// Perform the per-event analysis
void analyze(const Event& event) {
const vector<DressedLepton>& leptons = apply<DressedLeptons>(event, "leptons").dressedLeptons();
Particles neutrinos = apply<FinalState>(event, "neutrinos").particlesByPt();
if (leptons.size() != 1 || (neutrinos.size() == 0)) vetoEvent;
FourMomentum lepton = leptons[0].momentum();
FourMomentum p_miss = neutrinos[0].momentum();
if (p_miss.Et() < 25.0*GeV) vetoEvent;
double mT = sqrt(2.0 * lepton.pT() * p_miss.Et() * (1.0 - cos( lepton.phi()-p_miss.phi()) ) );
if (mT < 40.0*GeV) vetoEvent;
double jetcuts[] = { 30.0*GeV, 20.0*GeV };
const FastJets& jetpro = apply<FastJets>(event, "jets");
for (size_t i = 0; i < 2; ++i) {
vector<FourMomentum> jets;
double HT = lepton.pT() + p_miss.pT();
for (const Jet& jet : jetpro.jetsByPt(jetcuts[i])) {
if (jet.absrap() < 4.4 && deltaR(lepton, jet.momentum()) > 0.5) {
jets.push_back(jet.momentum());
HT += jet.pT();
}
}
_h_NjetIncl[i]->fill(0.0);
// Njet>=1 observables
if (jets.size() < 1) continue;
_h_NjetIncl[i]->fill(1.0);
_h_FirstJetPt_1jet[i]->fill(jets[0].pT());
_h_JetRapidity[i]->fill(jets[0].rapidity());
_h_Ht_1jet[i]->fill(HT);
_h_DeltaYElecJet[i]->fill(lepton.rapidity()-jets[0].rapidity());
_h_SumYElecJet[i]->fill(lepton.rapidity()+jets[0].rapidity());
// Njet>=2 observables
if (jets.size() < 2) continue;
_h_NjetIncl[i]->fill(2.0);
_h_FirstJetPt_2jet[i]->fill(jets[0].pT());
_h_SecondJetPt_2jet[i]->fill(jets[1].pT());
_h_Ht_2jet[i]->fill(HT);
double m2_2jet = FourMomentum(jets[0]+jets[1]).mass2();
_h_Minv_2jet[i]->fill(m2_2jet>0.0 ? sqrt(m2_2jet) : 0.0);
_h_DeltaR_2jet[i]->fill(deltaR(jets[0], jets[1]));
_h_DeltaY_2jet[i]->fill(jets[0].rapidity()-jets[1].rapidity());
_h_DeltaPhi_2jet[i]->fill(deltaPhi(jets[0], jets[1]));
// Njet>=3 observables
if (jets.size() < 3) continue;
_h_NjetIncl[i]->fill(3.0);
_h_FirstJetPt_3jet[i]->fill(jets[0].pT());
_h_SecondJetPt_3jet[i]->fill(jets[1].pT());
_h_ThirdJetPt_3jet[i]->fill(jets[2].pT());
_h_Ht_3jet[i]->fill(HT);
double m2_3jet = FourMomentum(jets[0]+jets[1]+jets[2]).mass2();
_h_Minv_3jet[i]->fill(m2_3jet>0.0 ? sqrt(m2_3jet) : 0.0);
// Njet>=4 observables
if (jets.size() < 4) continue;
_h_NjetIncl[i]->fill(4.0);
_h_FirstJetPt_4jet[i]->fill(jets[0].pT());
_h_SecondJetPt_4jet[i]->fill(jets[1].pT());
_h_ThirdJetPt_4jet[i]->fill(jets[2].pT());
_h_FourthJetPt_4jet[i]->fill(jets[3].pT());
_h_Ht_4jet[i]->fill(HT);
double m2_4jet = FourMomentum(jets[0]+jets[1]+jets[2]+jets[3]).mass2();
_h_Minv_4jet[i]->fill(m2_4jet>0.0 ? sqrt(m2_4jet) : 0.0);
// Njet>=5 observables
if (jets.size() < 5) continue;
_h_NjetIncl[i]->fill(5.0);
}
}
/// Normalise histograms etc., after the run
void finalize() {
for (size_t i = 0; i < 2; ++i) {
// Construct jet multiplicity ratio
for (size_t n = 1; n < _h_NjetIncl[i]->numBins(); ++n) {
YODA::HistoBin1D& b0 = _h_NjetIncl[i]->bin(n-1);
YODA::HistoBin1D& b1 = _h_NjetIncl[i]->bin(n);
double val = 0.0, err= 0.0;
if (b0.height() && b1.height()) {
val = b1.height() / b0.height();
err = b1.height() / b0.height() * (b0.relErr() + b1.relErr());
}
_h_RatioNjetIncl[i]->addPoint(n, val, 0.5, err);
}
// Scale all histos to the cross section
const double factor = crossSection()/sumOfWeights();
scale(_h_DeltaPhi_2jet[i], factor);
scale(_h_DeltaR_2jet[i], factor);
scale(_h_DeltaY_2jet[i], factor);
scale(_h_DeltaYElecJet[i], factor);
scale(_h_FirstJetPt_1jet[i], factor);
scale(_h_FirstJetPt_2jet[i], factor);
scale(_h_FirstJetPt_3jet[i], factor);
scale(_h_FirstJetPt_4jet[i], factor);
scale(_h_FourthJetPt_4jet[i], factor);
scale(_h_Ht_1jet[i], factor);
scale(_h_Ht_2jet[i], factor);
scale(_h_Ht_3jet[i], factor);
scale(_h_Ht_4jet[i], factor);
scale(_h_JetRapidity[i], factor);
scale(_h_Minv_2jet[i], factor);
scale(_h_Minv_3jet[i], factor);
scale(_h_Minv_4jet[i], factor);
scale(_h_NjetIncl[i], factor);
scale(_h_SecondJetPt_2jet[i], factor);
scale(_h_SecondJetPt_3jet[i], factor);
scale(_h_SecondJetPt_4jet[i], factor);
scale(_h_SumYElecJet[i], factor);
scale(_h_ThirdJetPt_3jet[i], factor);
scale(_h_ThirdJetPt_4jet[i], factor);
}
}
//@}
private:
/// @name Histograms
//@{
Histo1DPtr _h_DeltaPhi_2jet[2];
Histo1DPtr _h_DeltaR_2jet[2];
Histo1DPtr _h_DeltaY_2jet[2];
Histo1DPtr _h_DeltaYElecJet[2];
Histo1DPtr _h_FirstJetPt_1jet[2];
Histo1DPtr _h_FirstJetPt_2jet[2];
Histo1DPtr _h_FirstJetPt_3jet[2];
Histo1DPtr _h_FirstJetPt_4jet[2];
Histo1DPtr _h_FourthJetPt_4jet[2];
Histo1DPtr _h_Ht_1jet[2];
Histo1DPtr _h_Ht_2jet[2];
Histo1DPtr _h_Ht_3jet[2];
Histo1DPtr _h_Ht_4jet[2];
Histo1DPtr _h_JetRapidity[2];
Histo1DPtr _h_Minv_2jet[2];
Histo1DPtr _h_Minv_3jet[2];
Histo1DPtr _h_Minv_4jet[2];
Histo1DPtr _h_NjetIncl[2];
Scatter2DPtr _h_RatioNjetIncl[2];
Histo1DPtr _h_SecondJetPt_2jet[2];
Histo1DPtr _h_SecondJetPt_3jet[2];
Histo1DPtr _h_SecondJetPt_4jet[2];
Histo1DPtr _h_SumYElecJet[2];
Histo1DPtr _h_ThirdJetPt_3jet[2];
Histo1DPtr _h_ThirdJetPt_4jet[2];
//@}
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(ATLAS_2012_I1083318);
}
|