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| #include "Rivet/Analysis.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/InvisibleFinalState.hh"
#include "Rivet/Projections/FastJets.hh"
#include "Rivet/Projections/PromptFinalState.hh"
#include "Rivet/Projections/DressedLeptons.hh"
namespace Rivet {
/// @brief W + jets production at 8 TeV
class ATLAS_2018_I1635273 : public Analysis {
public:
RIVET_DEFAULT_ANALYSIS_CTOR(ATLAS_2018_I1635273);
// Book histograms and initialise projections before the run
void init() {
// Get options from the new option system
// Default uses electrons
// EL looks for W->ev candidate
// MU looks for W->mv candidate
_mode = 0;
if ( getOption("LMODE") == "EL" ) _mode = 0;
if ( getOption("LMODE") == "MU" ) _mode = 1;
FinalState fs;
Cut cuts = Cuts::pT > 25*GeV && Cuts::abseta < 2.5;
// Get photons to dress leptons
// (Paper says "radiated photons", but there was
// no promptness requirement in the analysis code)
FinalState photons(Cuts::abspid == PID::PHOTON);
// Get dressed leptons
PromptFinalState leptons(Cuts::abspid == (_mode? PID::MUON : PID::ELECTRON), false);
DressedLeptons dressedleptons(photons, leptons, 0.1, cuts, true);
declare(dressedleptons, "DressedLeptons");
// Get neutrinos for MET calculation
declare(InvisibleFinalState(true), "InvFS"); // true = only allow prompt invisibles
// jets
FastJets jets(fs, FastJets::ANTIKT, 0.4, JetAlg::Muons::NONE);
declare(jets, "Jets");
// book histograms
book(_h["N_incl_pb"], 1, 1, 1);
book(_h["HT_1j_fb"], 6, 1, 1);
book(_h["W_pt_1j_fb"], 11, 1, 1);
book(_h["jet_pt1_1j_fb"], 16, 1, 1);
book(_h["jet_y1_1j_fb"], 21, 1, 1);
book(_h["jet_pt2_2j_fb"], 26, 1, 1);
book(_h["jet_y2_2j_fb"], 28, 1, 1);
book(_h["DeltaRj12_2j_fb"], 30, 1, 1);
book(_h["jet_mass12_2j_fb"], 32, 1, 1);
book(_h["N_pb"], 34, 1, 1);
book(_h["HT_2j_fb"], 36, 1, 1);
book(_h["W_pt_2j_fb"], 41, 1, 1);
book(_h["jet_pt1_2j_fb"], 46, 1, 1);
book(_h["el_eta_0j_pb"], 51, 1, 1);
book(_h["el_eta_1j_pb"], 56, 1, 1);
book(_h["Wplus_N_incl_pb"], 3, 1, 1);
book(_h["Wplus_HT_1j_fb"], 8, 1, 1);
book(_h["Wplus_W_pt_1j_fb"], 13, 1, 1);
book(_h["Wplus_jet_pt1_1j_fb"], 18, 1, 1);
book(_h["Wplus_jet_y1_1j_fb"], 23, 1, 1);
book(_h["Wplus_HT_2j_fb"], 38, 1, 1);
book(_h["Wplus_W_pt_2j_fb"], 43, 1, 1);
book(_h["Wplus_jet_pt1_2j_fb"], 48, 1, 1);
book(_h["Wplus_el_eta_0j_pb"], 53, 1, 1);
book(_h["Wplus_el_eta_1j_pb"], 58, 1, 1);
book(_h["Wminus_N_incl_pb"], 3, 1, 2);
book(_h["Wminus_HT_1j_fb"], 8, 1, 2);
book(_h["Wminus_W_pt_1j_fb"], 13, 1, 2);
book(_h["Wminus_jet_pt1_1j_fb"],18, 1, 2);
book(_h["Wminus_jet_y1_1j_fb"], 23, 1, 2);
book(_h["Wminus_HT_2j_fb"], 38, 1, 2);
book(_h["Wminus_W_pt_2j_fb"], 43, 1, 2);
book(_h["Wminus_jet_pt1_2j_fb"],48, 1, 2);
book(_h["Wminus_el_eta_0j_pb"], 53, 1, 2);
book(_h["Wminus_el_eta_1j_pb"], 58, 1, 2);
// and ratios
book(_r["WplusOverWminus_N_incl_pb"], 3, 1, 3);
book(_r["WplusOverWminus_HT_1j_fb"], 8, 1, 3);
book(_r["WplusOverWminus_W_pt_1j_fb"], 13, 1, 3);
book(_r["WplusOverWminus_jet_pt1_1j_fb"], 18, 1, 3);
book(_r["WplusOverWminus_jet_y1_1j_fb"], 23, 1, 3);
book(_r["WplusOverWminus_HT_2j_fb"], 38, 1, 3);
book(_r["WplusOverWminus_W_pt_2j_fb"], 43, 1, 3);
book(_r["WplusOverWminus_jet_pt1_2j_fb"], 48, 1, 3);
book(_r["WplusOverWminus_el_eta_0j_pb"], 53, 1, 3);
book(_r["WplusOverWminus_el_eta_1j_pb"], 58, 1, 3);
}
// Perform the per-event analysis
void analyze(const Event& event) {
// retrieve the dressed electrons
const Particles& signal_leptons = apply<DressedLeptons>(event, "DressedLeptons").particlesByPt();
if (signal_leptons.size() != 1 ) vetoEvent;
const Particle& lepton = signal_leptons[0];
// calulate MET and mT
const Particles& invisibles = apply<InvisibleFinalState>(event, "InvFS").particles();
FourMomentum pMET = sum(invisibles, Kin::mom, FourMomentum()).setZ(0);
const double MET = pMET.pT() / GeV;
const double mT = sqrt( 2 * lepton.Et() / GeV * MET * (1 - cos(deltaPhi(lepton,pMET))));
if ( MET <= 25. ) vetoEvent;
if ( mT <= 40. ) vetoEvent;
// retrieve jets
Jets jets = apply<FastJets>(event, "Jets").jetsByPt(Cuts::pT > 30*GeV && Cuts::absrap < 4.4);
idiscardIfAnyDeltaRLess(jets, signal_leptons, 0.2);
// apply event selection on dR
for (const Jet& j : jets) {
if (deltaR(j, lepton) < 0.4) vetoEvent;
}
// calculate the observables
const double w_pt = (lepton.momentum() + pMET).pT() / GeV;
const size_t njets = jets.size();
double ST = sum(jets, Kin::pT, 0.0); // scalar pT sum of all selected jets
const double HT = ST + lepton.pT() / GeV + MET; //missET;
// fill W histograms
_h["N_pb"]->fill(njets);
for (size_t i = 0; i <= njets; ++i) {
_h["N_incl_pb"]->fill(i);
}
_h["el_eta_0j_pb"]->fill(lepton.abseta());
if (njets > 0) {
_h["HT_1j_fb"]->fill(HT);
_h["W_pt_1j_fb"]->fill(w_pt);
_h["jet_pt1_1j_fb"]->fill(jets[0].pT()/GeV);
_h["jet_y1_1j_fb"]->fill(jets[0].absrap());
_h["el_eta_1j_pb"]->fill(lepton.abseta());
}
if (njets > 1) {
_h["HT_2j_fb"]->fill(HT);
_h["W_pt_2j_fb"]->fill(w_pt);
_h["jet_pt1_2j_fb"]->fill(jets[0].pT()/GeV);
_h["DeltaRj12_2j_fb"]->fill(deltaR(jets[0],jets[1]));
_h["jet_pt2_2j_fb"]->fill(jets[1].pT()/GeV);
_h["jet_y2_2j_fb"]->fill(jets[1].absrap());
_h["jet_mass12_2j_fb"]->fill( (jets[0].mom()+jets[1].mom()).mass()/GeV);
}
// fill W+ histograms
if (lepton.charge() > 0) {
for (size_t i = 0; i <= njets; ++i) {
_h["Wplus_N_incl_pb"]->fill(i);
}
_h["Wplus_el_eta_0j_pb"]->fill(lepton.abseta());
if (njets > 0) {
_h["Wplus_HT_1j_fb"]->fill(HT);
_h["Wplus_W_pt_1j_fb"]->fill(w_pt);
_h["Wplus_jet_pt1_1j_fb"]->fill(jets[0].pT()/GeV);
_h["Wplus_jet_y1_1j_fb"]->fill(jets[0].absrap());
_h["Wplus_el_eta_1j_pb"]->fill(lepton.abseta());
if (njets > 1) {
_h["Wplus_HT_2j_fb"]->fill(HT);
_h["Wplus_W_pt_2j_fb"]->fill(w_pt);
_h["Wplus_jet_pt1_2j_fb"]->fill(jets[0].pT()/GeV);
}
}
}
// fill W- histograms
if (lepton.charge() < 0) {
for (size_t i = 0; i <= njets; ++i) {
_h["Wminus_N_incl_pb"]->fill(i);
}
_h["Wminus_el_eta_0j_pb"]->fill(lepton.abseta());
if (njets > 0) {
_h["Wminus_HT_1j_fb"]->fill(HT);
_h["Wminus_W_pt_1j_fb"]->fill(w_pt);
_h["Wminus_jet_pt1_1j_fb"]->fill(jets[0].pT()/GeV);
_h["Wminus_jet_y1_1j_fb"]->fill(jets[0].absrap());
_h["Wminus_el_eta_1j_pb"]->fill(lepton.abseta());
if (njets > 1) {
_h["Wminus_HT_2j_fb"]->fill(HT);
_h["Wminus_W_pt_2j_fb"]->fill(w_pt);
_h["Wminus_jet_pt1_2j_fb"]->fill(jets[0].pT()/GeV);
}
}
}
}
void finalize() {
const double scalefactor_fb = crossSection() / sumOfWeights() / femtobarn;
const double scalefactor_pb = crossSection() / sumOfWeights() / picobarn;
for (auto& hit : _h){
if (hit.first.find("_fb") != string::npos) scale(hit.second, scalefactor_fb);
else scale(hit.second, scalefactor_pb);
}
for (auto& rit : _r) {
string ratio_label = "WplusOverWminus";
string num_name = rit.first;
string denom_name = rit.first;
num_name.replace(rit.first.find(ratio_label),ratio_label.length(),"Wplus");
denom_name.replace(rit.first.find(ratio_label),ratio_label.length(),"Wminus");
divide(_h[num_name], _h[denom_name], rit.second);
}
}
protected:
// Data members like post-cuts event weight counters go here
size_t _mode;
private:
map<string, Histo1DPtr> _h;
map<string, Scatter2DPtr> _r;
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(ATLAS_2018_I1635273);
}
|