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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 {
/// @author Peter Richardson
class ATLAS_2012_I1095236 : public Analysis {
public:
/// Constructor
ATLAS_2012_I1095236()
: Analysis("ATLAS_2012_I1095236")
{ }
/// @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
declare(VisibleFinalState((Cuts::etaIn(-4.9,4.9))),"vfs");
// Book histograms
book(_count_SR0_A1 ,"count_SR0_A1", 1, 0., 1.);
book(_count_SR0_B1 ,"count_SR0_B1", 1, 0., 1.);
book(_count_SR0_C1 ,"count_SR0_C1", 1, 0., 1.);
book(_count_SR0_A2 ,"count_SR0_A2", 1, 0., 1.);
book(_count_SR0_B2 ,"count_SR0_B2", 1, 0., 1.);
book(_count_SR0_C2 ,"count_SR0_C2", 1, 0., 1.);
book(_count_SR1_D ,"count_SR1_D" , 1, 0., 1.);
book(_count_SR1_E ,"count_SR1_E" , 1, 0., 1.);
book(_hist_meff_SR0_A1 ,"hist_m_eff_SR0_A1", 14, 400., 1800.);
book(_hist_meff_SR0_A2 ,"hist_m_eff_SR0_A2", 14, 400., 1800.);
book(_hist_meff_SR1_D_e ,"hist_meff_SR1_D_e" , 16, 600., 2200.);
book(_hist_meff_SR1_D_mu ,"hist_meff_SR1_D_mu", 16, 600., 2200.);
book(_hist_met_SR0_A1 ,"hist_met_SR0_A1", 14, 0., 700.);
book(_hist_met_SR0_A2 ,"hist_met_SR0_A2", 14, 0., 700.);
book(_hist_met_SR0_D_e ,"hist_met_SR1_D_e" , 15, 0., 600.);
book(_hist_met_SR0_D_mu ,"hist_met_SR1_D_mu", 15, 0., 600.);
}
/// 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() ) < 2.8 ) {
cand_jets.push_back(jet);
}
}
const Particles cand_e = apply<IdentifiedFinalState>(event, "elecs").particlesByPt();
const Particles cand_mu = apply<IdentifiedFinalState>(event, "muons").particlesByPt();
// 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 );
}
// get the loose leptons used to define the 0 lepton channel
Particles loose_e, loose_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 ) loose_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 ) loose_mu.push_back( mu );
}
// tight leptons for the 1-lepton channel
Particles tight_mu;
Particles chg_tracks =
apply<ChargedFinalState>(event, "cfs").particles();
for ( const Particle & mu : loose_mu) {
if(mu.perp()<20.) continue;
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 )
tight_mu.push_back(mu);
}
Particles tight_e;
for ( const Particle & e : loose_e ) {
if(e.perp()<25.) continue;
double pTinCone = -e.perp();
for ( const Particle & track : chg_tracks ) {
if ( deltaR(e.momentum(),track.momentum()) <= 0.2 )
pTinCone += track.pT();
}
if (pTinCone/e.perp()<0.1) {
tight_e.push_back(e);
}
}
// pTmiss
Particles vfs_particles =
apply<VisibleFinalState>(event, "vfs").particles();
FourMomentum pTmiss;
for ( const Particle & p : vfs_particles ) {
pTmiss -= p.momentum();
}
double eTmiss = pTmiss.pT();
// get the number of b-tagged jets
unsigned int ntagged=0;
for (const Jet & jet : recon_jets ) {
if(jet.perp()>50. && abs(jet.eta())<2.5 &&
jet.bTagged() && rand()/static_cast<double>(RAND_MAX)<=0.60)
++ntagged;
}
// ATLAS calo problem
if(rand()/static_cast<double>(RAND_MAX)<=0.42) {
for ( const Jet & jet : recon_jets ) {
double eta = jet.rapidity();
double phi = jet.azimuthalAngle(MINUSPI_PLUSPI);
if(jet.perp()>50 && eta>-0.1&&eta<1.5&&phi>-0.9&&phi<-0.5)
vetoEvent;
}
}
// at least 1 b tag
if(ntagged==0) vetoEvent;
// minumum Et miss
if(eTmiss<80.) vetoEvent;
// at least 3 jets pT > 50
if(recon_jets.size()<3 || recon_jets[2].perp()<50.)
vetoEvent;
// m_eff
double m_eff = eTmiss;
for(unsigned int ix=0;ix<3;++ix)
m_eff += recon_jets[ix].perp();
// delta Phi
double min_dPhi = 999.999;
double pTmiss_phi = pTmiss.phi();
for(unsigned int ix=0;ix<3;++ix) {
min_dPhi = min( min_dPhi, deltaPhi( pTmiss_phi, recon_jets[ix].phi() ) );
}
// 0-lepton channels
if(loose_e.empty() && loose_mu.empty() &&
recon_jets[0].perp()>130. && eTmiss>130. &&
eTmiss/m_eff>0.25 && min_dPhi>0.4) {
// jet charge cut
bool jetCharge = true;
for(unsigned int ix=0;ix<3;++ix) {
if(fabs(recon_jets[ix].eta())>2.) continue;
double trackpT=0;
for(const Particle & p : recon_jets[ix].particles()) {
if(PID::charge3(p.pid())==0) continue;
trackpT += p.perp();
}
if(trackpT/recon_jets[ix].perp()<0.05)
jetCharge = false;
}
if(jetCharge) {
// SR0-A region
if(m_eff>500.) {
_count_SR0_A1->fill(0.5,weight);
_hist_meff_SR0_A1->fill(m_eff,weight);
_hist_met_SR0_A1 ->fill(eTmiss,weight);
if(ntagged>=2) {
_count_SR0_A2->fill(0.5,weight);
_hist_meff_SR0_A2->fill(m_eff,weight);
_hist_met_SR0_A2 ->fill(eTmiss,weight);
}
}
// SR0-B
if(m_eff>700.) {
_count_SR0_B1->fill(0.5,weight);
if(ntagged>=2) _count_SR0_B2->fill(0.5,weight);
}
// SR0-C
if(m_eff>900.) {
_count_SR0_C1->fill(0.5,weight);
if(ntagged>=2) _count_SR0_C2->fill(0.5,weight);
}
}
}
// 1-lepton channels
if(tight_e.size() + tight_mu.size() == 1 &&
recon_jets.size()>=4 && recon_jets[3].perp()>50.&&
recon_jets[0].perp()>60.) {
Particle lepton = tight_e.empty() ? tight_mu[0] : tight_e[0];
m_eff += lepton.perp() + recon_jets[3].perp();
// transverse mass cut
double mT = 2.*(lepton.perp()*eTmiss-
lepton.px()*pTmiss.px()-
lepton.py()*pTmiss.py());
mT = sqrt(mT);
if(mT>100.&&m_eff>700.) {
// D region
_count_SR1_D->fill(0.5,weight);
if(lepton.abspid()==PID::ELECTRON) {
_hist_meff_SR1_D_e->fill(m_eff,weight);
_hist_met_SR0_D_e->fill(eTmiss,weight);
}
else {
_hist_meff_SR1_D_mu->fill(m_eff,weight);
_hist_met_SR0_D_mu->fill(eTmiss,weight);
}
// E region
if(eTmiss>200.) {
_count_SR1_E->fill(0.5,weight);
}
}
}
}
void finalize() {
double norm = crossSection()/femtobarn*2.05/sumOfWeights();
// these are number of events at 2.05fb^-1 per 100 GeV
scale( _hist_meff_SR0_A1 , 100. * norm );
scale( _hist_meff_SR0_A2 , 100. * norm );
scale( _hist_meff_SR1_D_e , 100. * norm );
scale( _hist_meff_SR1_D_mu , 100. * norm );
// these are number of events at 2.05fb^-1 per 50 GeV
scale( _hist_met_SR0_A1, 50. * norm );
scale( _hist_met_SR0_A2, 40. * norm );
// these are number of events at 2.05fb^-1 per 40 GeV
scale( _hist_met_SR0_D_e , 40. * norm );
scale( _hist_met_SR0_D_mu, 40. * norm );
// these are number of events at 2.05fb^-1
scale(_count_SR0_A1,norm);
scale(_count_SR0_B1,norm);
scale(_count_SR0_C1,norm);
scale(_count_SR0_A2,norm);
scale(_count_SR0_B2,norm);
scale(_count_SR0_C2,norm);
scale(_count_SR1_D ,norm);
scale(_count_SR1_E ,norm);
}
//@}
private:
Histo1DPtr _count_SR0_A1;
Histo1DPtr _count_SR0_B1;
Histo1DPtr _count_SR0_C1;
Histo1DPtr _count_SR0_A2;
Histo1DPtr _count_SR0_B2;
Histo1DPtr _count_SR0_C2;
Histo1DPtr _count_SR1_D;
Histo1DPtr _count_SR1_E;
Histo1DPtr _hist_meff_SR0_A1;
Histo1DPtr _hist_meff_SR0_A2;
Histo1DPtr _hist_meff_SR1_D_e;
Histo1DPtr _hist_meff_SR1_D_mu;
Histo1DPtr _hist_met_SR0_A1;
Histo1DPtr _hist_met_SR0_A2;
Histo1DPtr _hist_met_SR0_D_e;
Histo1DPtr _hist_met_SR0_D_mu;
};
// This global object acts as a hook for the plugin system
RIVET_DECLARE_PLUGIN(ATLAS_2012_I1095236);
}
|