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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/IdentifiedFinalState.hh"
#include "Rivet/Projections/FastJets.hh"
#include "Rivet/Projections/VetoedFinalState.hh"
namespace Rivet {
/// @author Peter Richardson
class ATLAS_2012_I1125961 : public Analysis {
public:
/// Constructor
ATLAS_2012_I1125961()
: Analysis("ATLAS_2012_I1125961")
{ }
/// @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");
// Jet finder
VetoedFinalState vfs;
vfs.addVetoPairId(PID::MUON);
declare(FastJets(vfs, FastJets::ANTIKT, 0.4), "AntiKtJets04");
// All tracks (to do deltaR with leptons)
declare(ChargedFinalState(Cuts::abseta < 3.0), "cfs");
// Used for pTmiss (N.B. the real 'vfs' extends beyond 4.5 to |eta| = 4.9)
declare(VisibleFinalState(Cuts::abseta < 4.5), "vfs");
// Book histograms
book(_count_A_tight ,"count_A_tight" , 1, 0., 1.);
book(_count_A_medium ,"count_A_medium" , 1, 0., 1.);
book(_count_Ap_medium ,"count_Ap_medium" , 1, 0., 1.);
book(_count_B_tight ,"count_B_tight" , 1, 0., 1.);
book(_count_C_tight ,"count_C_tight" , 1, 0., 1.);
book(_count_C_medium ,"count_C_medium" , 1, 0., 1.);
book(_count_C_loose ,"count_C_loose" , 1, 0., 1.);
book(_count_D_tight ,"count_D_tight" , 1, 0., 1.);
book(_count_E_tight ,"count_E_tight" , 1, 0., 1.);
book(_count_E_medium ,"count_E_medium" , 1, 0., 1.);
book(_count_E_loose ,"count_E_loose" , 1, 0., 1.);
book(_hist_meff_A ,"hist_m_eff_A" , 30, 0., 3000.);
book(_hist_meff_Ap ,"hist_m_eff_Ap", 30, 0., 3000.);
book(_hist_meff_B ,"hist_m_eff_B" , 30, 0., 3000.);
book(_hist_meff_C ,"hist_m_eff_C" , 30, 0., 3000.);
book(_hist_meff_D ,"hist_m_eff_D" , 30, 0., 3000.);
book(_hist_meff_E ,"hist_m_eff_E" , 30, 0., 3000.);
}
/// Perform the per-event analysis
void analyze(const Event& event) {
const double weight = 1.0;
Jets cand_jets;
const Jets jets = apply<FastJets>(event, "AntiKtJets04").jetsByPt(20.0*GeV);
for (const Jet& jet : jets) {
if ( fabs( jet.eta() ) < 4.9 ) {
cand_jets.push_back(jet);
}
}
const Particles cand_e = apply<IdentifiedFinalState>(event, "elecs").particlesByPt();
// Muon isolation not mentioned in hep-exp 1109.6572 but assumed to still be applicable
Particles cand_mu;
const Particles chg_tracks = apply<ChargedFinalState>(event, "cfs").particles();
const Particles muons = apply<IdentifiedFinalState>(event, "muons").particlesByPt();
for (const Particle& mu : muons) {
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);
}
// Resolve jet-lepton overlap for jets with |eta| < 2.8
Jets recon_jets;
for ( const Jet& jet : cand_jets ) {
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 );
}
Particles recon_e, recon_mu;
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 );
}
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
// Based on all candidate electrons, muons and jets, plus everything else with |eta| < 4.5
// i.e. everything in our projection "vfs" plus the jets with |eta| > 4.5
Particles vfs_particles = apply<VisibleFinalState>(event, "vfs").particles();
FourMomentum pTmiss;
for ( const Particle & p : vfs_particles ) {
pTmiss -= p.momentum();
}
for ( const Jet& jet : cand_jets ) {
if ( fabs( jet.eta() ) > 4.5 ) pTmiss -= jet.momentum();
}
double eTmiss = pTmiss.pT();
// no electron pT> 20 or muons pT>10
if ( !recon_mu.empty() || !recon_e.empty() ) {
MSG_DEBUG("Charged leptons left after selection");
vetoEvent;
}
if ( eTmiss <= 160 * GeV ) {
MSG_DEBUG("Not enough eTmiss: " << eTmiss << " < 130");
vetoEvent;
}
if ( recon_jets.size()<2 ||
recon_jets[0].pT() <= 130.0 * GeV ||
recon_jets[0].pT() <= 60.0 * GeV ) {
MSG_DEBUG("No hard leading jet in " << recon_jets.size() << " jets");
vetoEvent;
}
// ==================== observables ====================
int Njets = 0;
double min_dPhi_All = 999.999;
double min_dPhi_2 = 999.999;
double min_dPhi_3 = 999.999;
double pTmiss_phi = pTmiss.phi();
for ( const Jet& jet : recon_jets ) {
if ( jet.pT() < 40 * GeV ) continue;
if ( Njets < 2 ) {
min_dPhi_2 = min( min_dPhi_2, deltaPhi( pTmiss_phi, jet.phi() ) );
}
if( Njets < 3) {
min_dPhi_3 = min( min_dPhi_3, deltaPhi( pTmiss_phi, jet.phi() ) );
}
min_dPhi_All = min( min_dPhi_All, deltaPhi( pTmiss_phi, jet.phi() ) );
++Njets;
}
// inclusive meff
double m_eff_inc = eTmiss;
for ( const Jet& jet : recon_jets ) {
double perp = jet.pT();
if(perp>40.) m_eff_inc += perp;
}
// region A
double m_eff_Nj = eTmiss + recon_jets[0].pT() + recon_jets[1].pT();
if( min_dPhi_2 > 0.4 && eTmiss/m_eff_Nj > 0.3 ) {
_hist_meff_A->fill(m_eff_inc,weight);
if(m_eff_inc>1900.) _count_A_tight ->fill(0.5,weight);
if(m_eff_inc>1400.) _count_A_medium->fill(0.5,weight);
}
// region A'
if( min_dPhi_2 > 0.4 && eTmiss/m_eff_Nj > 0.4 ) {
_hist_meff_Ap->fill(m_eff_inc,weight);
if(m_eff_inc>1200.) _count_Ap_medium->fill(0.5,weight);
}
// for rest of regions 3 jets pT> 60 needed
if(recon_jets.size()<3 || recon_jets[2].perp()<60.)
vetoEvent;
// region B
m_eff_Nj += recon_jets[2].perp();
if( min_dPhi_3 > 0.4 && eTmiss/m_eff_Nj > 0.25 ) {
_hist_meff_B->fill(m_eff_inc,weight);
if(m_eff_inc>1900.) _count_B_tight ->fill(0.5,weight);
}
// for rest of regions 4 jets pT> 60 needed
if(recon_jets.size()<4 || recon_jets[3].perp()<60.)
vetoEvent;
// region C
m_eff_Nj += recon_jets[3].perp();
if( min_dPhi_3 > 0.4 && min_dPhi_All > 0.2 && eTmiss/m_eff_Nj > 0.25 ) {
_hist_meff_C->fill(m_eff_inc,weight);
if(m_eff_inc>1500.) _count_C_tight ->fill(0.5,weight);
if(m_eff_inc>1200.) _count_C_medium->fill(0.5,weight);
if(m_eff_inc> 900.) _count_C_loose ->fill(0.5,weight);
}
// for rest of regions 5 jets pT> 40 needed
if(recon_jets.size()<5 || recon_jets[4].perp()<40.)
vetoEvent;
// region D
m_eff_Nj += recon_jets[4].perp();
if( min_dPhi_3 > 0.4 && min_dPhi_All > 0.2 && eTmiss/m_eff_Nj > 0.2 ) {
_hist_meff_D->fill(m_eff_inc,weight);
if(m_eff_inc>1500.) _count_D_tight ->fill(0.5,weight);
}
// for rest of regions 6 jets pT> 40 needed
if(recon_jets.size()<6 || recon_jets[5].perp()<40.)
vetoEvent;
// region E
m_eff_Nj += recon_jets[5].perp();
if( min_dPhi_3 > 0.4 && min_dPhi_All > 0.2 && eTmiss/m_eff_Nj > 0.15 ) {
_hist_meff_E->fill(m_eff_inc,weight);
if(m_eff_inc>1400.) _count_E_tight ->fill(0.5,weight);
if(m_eff_inc>1200.) _count_E_medium->fill(0.5,weight);
if(m_eff_inc> 900.) _count_E_loose ->fill(0.5,weight);
}
}
void finalize() {
double norm = crossSection()/femtobarn*4.7/sumOfWeights();
// these are number of events at 4.7fb^-1 per 100 GeV
scale( _hist_meff_A , 100. * norm );
scale( _hist_meff_Ap, 100. * norm );
scale( _hist_meff_B , 100. * norm );
scale( _hist_meff_C , 100. * norm );
scale( _hist_meff_D , 100. * norm );
scale( _hist_meff_E , 100. * norm );
// these are number of events at 4.7fb^-1
scale(_count_A_tight ,norm);
scale(_count_A_medium ,norm);
scale(_count_Ap_medium,norm);
scale(_count_B_tight ,norm);
scale(_count_C_tight ,norm);
scale(_count_C_medium ,norm);
scale(_count_C_loose ,norm);
scale(_count_D_tight ,norm);
scale(_count_E_tight ,norm);
scale(_count_E_medium ,norm);
scale(_count_E_loose ,norm);
}
//@}
private:
Histo1DPtr _count_A_tight;
Histo1DPtr _count_A_medium;
Histo1DPtr _count_Ap_medium;
Histo1DPtr _count_B_tight;
Histo1DPtr _count_C_tight;
Histo1DPtr _count_C_medium;
Histo1DPtr _count_C_loose;
Histo1DPtr _count_D_tight;
Histo1DPtr _count_E_tight;
Histo1DPtr _count_E_medium;
Histo1DPtr _count_E_loose;
Histo1DPtr _hist_meff_A ;
Histo1DPtr _hist_meff_Ap;
Histo1DPtr _hist_meff_B ;
Histo1DPtr _hist_meff_C ;
Histo1DPtr _hist_meff_D ;
Histo1DPtr _hist_meff_E ;
};
// This global object acts as a hook for the plugin system
RIVET_DECLARE_PLUGIN(ATLAS_2012_I1125961);
}
|