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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"
namespace Rivet {
class ATLAS_2011_S8983313 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(ATLAS_2011_S8983313);
/// @name Analysis methods
//@{
/// Book histograms and initialise projections before the run
void init() {
// projection to find the electrons
Cut pt10 = Cuts::pT > 10.0*GeV;
IdentifiedFinalState elecs(Cuts::abseta < 2.47 && pt10);
elecs.acceptIdPair(PID::ELECTRON);
declare(elecs, "elecs");
// veto region electrons
Cut vetocut = Cuts::absetaIn(1.37, 1.52);
IdentifiedFinalState veto_elecs(vetocut && pt10);
veto_elecs.acceptIdPair(PID::ELECTRON);
declare(veto_elecs, "veto_elecs");
// projection to find the muons
IdentifiedFinalState muons(Cuts::abseta < 2.4 && pt10 );
muons.acceptIdPair(PID::MUON);
declare(muons, "muons");
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 < 3.0),"cfs");
// for pTmiss
declare(VisibleFinalState(Cuts::abseta < 4.9),"vfs");
/// Book histograms
book(_count_A ,"count_A", 1, 0., 1.);
book(_count_B ,"count_B", 1, 0., 1.);
book(_count_C ,"count_C", 1, 0., 1.);
book(_count_D ,"count_D", 1, 0., 1.);
book(_hist_meff_A ,"m_eff_A", 30, 0., 3000.);
book(_hist_mT2_B ,"m_T2", 25, 0., 1000.);
book(_hist_meff_CD ,"m_eff_C_D", 30, 0., 3000.);
book(_hist_eTmiss ,"Et_miss", 20, 0., 1000.);
}
/// Perform the per-event analysis
void analyze(const Event& event) {
const double weight = 1.0;
Particles veto_e = apply<IdentifiedFinalState>(event, "veto_elecs").particles();
if ( ! veto_e.empty() ) {
MSG_DEBUG("electrons in veto region");
vetoEvent;
}
Jets cand_jets = apply<FastJets>(event, "AntiKtJets04").jetsByPt(Cuts::pT > 20*GeV && Cuts::abseta < 4.9);
Particles cand_e = apply<IdentifiedFinalState>(event, "elecs").particlesByPt();
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, track) <= 0.2 ) pTinCone += track.pT();
}
if ( pTinCone < 1.8*GeV ) cand_mu.push_back(mu);
}
Jets cand_jets_2;
for (const Jet& jet : cand_jets) {
if (jet.abseta() >= 2.5)
cand_jets_2.push_back(jet);
else {
bool away_from_e = true;
for (const Particle& e : cand_e) {
if (deltaR(e, jet) <= 0.2 ) {
away_from_e = false;
break;
}
}
if ( away_from_e )
cand_jets_2.push_back( jet );
}
}
Particles recon_e, recon_mu;
for ( const Particle & e : cand_e ) {
bool away = true;
for ( const Jet& jet : cand_jets_2 ) {
if ( deltaR(e, jet) < 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 : cand_jets_2 ) {
if ( deltaR(mu, jet) < 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();
// final jet filter
Jets recon_jets;
for ( const Jet& jet : cand_jets_2 ) {
if ( jet.abseta() <= 2.5 ) recon_jets.push_back( jet );
}
// now only use recon_jets, recon_mu, recon_e
if ( ! ( recon_mu.empty() && recon_e.empty() ) ) {
MSG_DEBUG("Charged leptons left after selection");
vetoEvent;
}
if ( eTmiss <= 100*GeV ) {
MSG_DEBUG("Not enough eTmiss: " << eTmiss << " < 100");
vetoEvent;
}
if ( recon_jets.empty() || recon_jets[0].pT() <= 120.0*GeV ) {
MSG_DEBUG("No hard leading jet in " << recon_jets.size() << " jets");
vetoEvent;
}
// ==================== observables ====================
// Njets, min_dPhi
int Njets = 0;
double min_dPhi = 999.999;
double pTmiss_phi = pTmiss.phi();
for ( const Jet& jet : recon_jets ) {
if ( jet.pT() > 40 * GeV ) {
if ( Njets < 3 )
min_dPhi = min( min_dPhi, deltaPhi( pTmiss_phi, jet.phi() ) );
++Njets;
}
}
if ( Njets < 2 ) {
MSG_DEBUG("Only " << Njets << " >40 GeV jets left");
vetoEvent;
}
if ( min_dPhi <= 0.4 ) {
MSG_DEBUG("dPhi too small");
vetoEvent;
}
// m_eff
double m_eff_2j = eTmiss
+ recon_jets[0].pT()
+ recon_jets[1].pT();
double m_eff_3j = recon_jets.size() < 3 ? -999.0 : m_eff_2j + recon_jets[2].pT();
// etmiss / m_eff
double et_meff_2j = eTmiss / m_eff_2j;
double et_meff_3j = eTmiss / m_eff_3j;
FourMomentum a = recon_jets[0].momentum();
FourMomentum b = recon_jets[1].momentum();
double m_T2 = mT2( a, b, pTmiss, 0.0 ); // zero mass invisibles
// ==================== FILL ====================
MSG_DEBUG( "Trying to fill "
<< Njets << ' '
<< m_eff_2j << ' '
<< et_meff_2j << ' '
<< m_eff_3j << ' '
<< et_meff_3j << ' '
<< m_T2 );
_hist_eTmiss->fill(eTmiss, weight);
// AAAAAAAAAA
if ( et_meff_2j > 0.3 ) {
_hist_meff_A->fill(m_eff_2j, weight);
if ( m_eff_2j > 500 * GeV ) {
MSG_DEBUG("Hits A");
_count_A->fill(0.5, weight);
}
}
// BBBBBBBBBB
_hist_mT2_B->fill(m_T2, weight);
if ( m_T2 > 300 * GeV ) {
MSG_DEBUG("Hits B");
_count_B->fill(0.5, weight);
}
// need 3 jets for C and D
if ( Njets >= 3 && et_meff_3j > 0.25 ) {
_hist_meff_CD->fill(m_eff_3j, weight);
// CCCCCCCCCC
if ( m_eff_3j > 500 * GeV ) {
MSG_DEBUG("Hits C");
_count_C->fill(0.5, weight);
}
// DDDDDDDDDD
if ( m_eff_3j > 1000 * GeV ) {
MSG_DEBUG("Hits D");
_count_D->fill(0.5, weight);
}
}
}
//@}
void finalize() {
double norm = crossSection()/picobarn*35.0/sumOfWeights();
scale(_hist_meff_A ,100.*norm);
scale(_hist_mT2_B ,100.*norm);
scale(_hist_meff_CD, 40.*norm);
scale(_hist_eTmiss , 50.*norm);
}
private:
/// @name Histograms
//@{
Histo1DPtr _count_A;
Histo1DPtr _count_B;
Histo1DPtr _count_C;
Histo1DPtr _count_D;
Histo1DPtr _hist_meff_A;
Histo1DPtr _hist_mT2_B;
Histo1DPtr _hist_meff_CD;
Histo1DPtr _hist_eTmiss;
//@}
};
RIVET_DECLARE_ALIASED_PLUGIN(ATLAS_2011_S8983313, ATLAS_2011_I890749);
}
|