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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/ChargedFinalState.hh"
#include "Rivet/Projections/VisibleFinalState.hh"
#include "Rivet/Projections/VetoedFinalState.hh"
#include "Rivet/Projections/IdentifiedFinalState.hh"
#include "Rivet/Projections/FastJets.hh"
#include "Rivet/Tools/RivetMT2.hh"
namespace Rivet {
class ATLAS_2012_I1117704 : public Analysis {
public:
/// @name Constructors etc.
//@{
/// Constructor
ATLAS_2012_I1117704()
: Analysis("ATLAS_2012_I1117704")
{ }
//@}
public:
/// @name Analysis methods
//@{
/// Book histograms and initialise projections before the run
void init() {
// projection to find the electrons
IdentifiedFinalState elecs(Cuts::abseta < 2.47 && Cuts::pT > 20*GeV);
elecs.acceptIdPair(PID::ELECTRON);
declare(elecs, "elecs");
// projection to find the muons
IdentifiedFinalState muons(Cuts::abseta < 2.4 && Cuts::pT > 10*GeV);
muons.acceptIdPair(PID::MUON);
declare(muons, "muons");
// for pTmiss
declare(VisibleFinalState(Cuts::abseta < 4.9), "vfs");
VetoedFinalState vfs;
vfs.addVetoPairId(PID::MUON);
/// Jet finder
declare(FastJets(vfs, FastJets::ANTIKT, 0.4), "AntiKtJets04");
// all tracks (to do deltaR with leptons)
declare(ChargedFinalState(Cuts::abseta < 3),"cfs");
/// Book histograms
book(_etmiss_HT_7j55 ,"etmiss_HT_7j55", 8, 0., 16.);
book(_etmiss_HT_8j55 ,"etmiss_HT_8j55", 8, 0., 16.);
book(_etmiss_HT_9j55 ,"etmiss_HT_9j55", 8, 0., 16.);
book(_etmiss_HT_6j80 ,"etmiss_HT_6j80", 8, 0., 16.);
book(_etmiss_HT_7j80 ,"etmiss_HT_7j80", 8, 0., 16.);
book(_etmiss_HT_8j80 ,"etmiss_HT_8j80", 8, 0., 16.);
book(_hist_njet55 ,"hist_njet55", 11, 2.5, 13.5);
book(_hist_njet80 ,"hist_njet80", 11, 2.5, 13.5);
book(_count_7j55 ,"count_7j55", 1, 0., 1.);
book(_count_8j55 ,"count_8j55", 1, 0., 1.);
book(_count_9j55 ,"count_9j55", 1, 0., 1.);
book(_count_6j80 ,"count_6j80", 1, 0., 1.);
book(_count_7j80 ,"count_7j80", 1, 0., 1.);
book(_count_8j80 ,"count_8j80", 1, 0., 1.);
}
/// Perform the per-event analysis
void analyze(const Event& event) {
const double weight = 1.0;
// get the jet candidates
Jets cand_jets;
for (const Jet& jet :
apply<FastJets>(event, "AntiKtJets04").jetsByPt(20.0*GeV) ) {
if ( fabs( jet.eta() ) < 2.8 ) {
cand_jets.push_back(jet);
}
}
// candidate muons
Particles cand_mu;
Particles chg_tracks =
apply<ChargedFinalState>(event, "cfs").particles();
for ( const Particle& mu :
apply<IdentifiedFinalState>(event, "muons").particlesByPt() ) {
double pTinCone = -mu.pT();
for ( const Particle& track : chg_tracks ) {
if ( deltaR(mu.momentum(),track.momentum()) <= 0.2 )
pTinCone += track.pT();
}
if ( pTinCone < 1.8*GeV )
cand_mu.push_back(mu);
}
// candidate electrons
Particles cand_e =
apply<IdentifiedFinalState>(event, "elecs").particlesByPt();
// resolve jet/lepton ambiguity
Jets recon_jets;
for ( const Jet& jet : cand_jets ) {
// candidates after |eta| < 2.8
if ( fabs( jet.eta() ) >= 2.8 ) continue;
bool away_from_e = true;
for ( const Particle& e : cand_e ) {
if ( deltaR(e.momentum(),jet.momentum()) <= 0.2 ) {
away_from_e = false;
break;
}
}
if ( away_from_e ) recon_jets.push_back( jet );
}
// only keep electrons more than R=0.4 from jets
Particles recon_e;
for ( const Particle& e : cand_e ) {
bool away = true;
for ( const Jet& jet : recon_jets ) {
if ( deltaR(e.momentum(),jet.momentum()) < 0.4 ) {
away = false;
break;
}
}
if ( away )
recon_e.push_back( e );
}
// only keep muons more than R=0.4 from jets
Particles recon_mu;
for ( const Particle& mu : cand_mu ) {
bool away = true;
for ( const Jet& jet : recon_jets ) {
if ( deltaR(mu.momentum(),jet.momentum()) < 0.4 ) {
away = false;
break;
}
}
if ( away )
recon_mu.push_back( mu );
}
// pTmiss
Particles vfs_particles =
apply<VisibleFinalState>(event, "vfs").particles();
FourMomentum pTmiss;
for ( const Particle& p : vfs_particles ) {
pTmiss -= p.momentum();
}
double eTmiss = pTmiss.pT();
// now only use recon_jets, recon_mu, recon_e
// reject events with electrons and muons
if ( ! ( recon_mu.empty() && recon_e.empty() ) ) {
MSG_DEBUG("Charged leptons left after selection");
vetoEvent;
}
// calculate H_T
double HT=0;
for ( const Jet& jet : recon_jets ) {
if ( jet.pT() > 40 * GeV )
HT += jet.pT() ;
}
// number of jets
unsigned int njet55=0, njet80=0;
for (unsigned int ix=0;ix<recon_jets.size();++ix) {
if(recon_jets[ix].pT()>80.*GeV) ++njet80;
if(recon_jets[ix].pT()>55.*GeV) ++njet55;
}
if(njet55==0) vetoEvent;
double ratio = eTmiss/sqrt(HT);
if(ratio>4.) {
_hist_njet55->fill(njet55,weight);
_hist_njet80->fill(njet80,weight);
// 7j55
if(njet55>=7)
_count_7j55->fill( 0.5, weight);
// 8j55
if(njet55>=8)
_count_8j55->fill( 0.5, weight) ;
// 8j55
if(njet55>=9)
_count_9j55->fill( 0.5, weight) ;
// 6j80
if(njet80>=6)
_count_6j80->fill( 0.5, weight) ;
// 7j80
if(njet80>=7)
_count_7j80->fill( 0.5, weight) ;
// 8j80
if(njet80>=8)
_count_8j80->fill( 0.5, weight) ;
}
if(njet55>=7)
_etmiss_HT_7j55->fill( ratio, weight);
// 8j55
if(njet55>=8)
_etmiss_HT_8j55->fill( ratio, weight) ;
// 8j55
if(njet55>=9)
_etmiss_HT_9j55->fill( ratio, weight) ;
// 6j80
if(njet80>=6)
_etmiss_HT_6j80->fill( ratio, weight) ;
// 7j80
if(njet80>=7)
_etmiss_HT_7j80->fill( ratio, weight) ;
// 8j80
if(njet80>=8)
_etmiss_HT_8j80->fill( ratio, weight) ;
}
//@}
void finalize() {
double norm = crossSection()/femtobarn*4.7/sumOfWeights();
scale(_etmiss_HT_7j55,2.*norm);
scale(_etmiss_HT_8j55,2.*norm);
scale(_etmiss_HT_9j55,2.*norm);
scale(_etmiss_HT_6j80,2.*norm);
scale(_etmiss_HT_7j80,2.*norm);
scale(_etmiss_HT_8j80,2.*norm);
scale(_hist_njet55,norm);
scale(_hist_njet80,norm);
scale(_count_7j55,norm);
scale(_count_8j55,norm);
scale(_count_9j55,norm);
scale(_count_6j80,norm);
scale(_count_7j80,norm);
scale(_count_8j80,norm);
}
private:
/// @name Histograms
//@{
Histo1DPtr _etmiss_HT_7j55;
Histo1DPtr _etmiss_HT_8j55;
Histo1DPtr _etmiss_HT_9j55;
Histo1DPtr _etmiss_HT_6j80;
Histo1DPtr _etmiss_HT_7j80;
Histo1DPtr _etmiss_HT_8j80;
Histo1DPtr _hist_njet55;
Histo1DPtr _hist_njet80;
Histo1DPtr _count_7j55;
Histo1DPtr _count_8j55;
Histo1DPtr _count_9j55;
Histo1DPtr _count_6j80;
Histo1DPtr _count_7j80;
Histo1DPtr _count_8j80;
//@}
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(ATLAS_2012_I1117704);
}
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