bool PseudoTopAnalyser::passesEventSelection( const MCParticlePointer pseudoLepton, const ParticlePointer pseudoNeutrino, const JetCollection pseudoJets, const MCParticleCollection pseudoBs, const ParticleCollection allPseudoLeptons, const ParticlePointer pseudoMET ) {
// Event selection taken from here : https://twiki.cern.ch/twiki/bin/view/LHCPhysics/ParticleLevelTopDefinitions
unsigned int numberGoodLeptons = 0;
unsigned int numberVetoLeptons = 0;
ParticlePointer leadingLepton;
for ( unsigned int leptonIndex = 0; leptonIndex < allPseudoLeptons.size(); ++ leptonIndex ) {
const ParticlePointer lepton = allPseudoLeptons.at(leptonIndex);
// Check if this is a good signal type lepton
if ( lepton->pt() > minLeptonPt_ && fabs(lepton->eta()) < maxLeptonAbsEta_ ) {
++numberGoodLeptons;
if ( leadingLepton == 0 ) leadingLepton = lepton;
}
// Check if this is a veto lepton
if ( lepton->pt() > minVetoLeptonPt_ && fabs(lepton->eta()) < maxVetoLeptonAbsEta_ ) {
++numberVetoLeptons;
}
}
// Neutrino pt sum
bool passesNeutrinoSumPt = false;
if ( pseudoMET != 0 ) {
if ( pseudoMET->pt() > minNeutrinoSumPt_ ) passesNeutrinoSumPt = true;
}
// W MT
bool passesWMT = false;
if ( leadingLepton != 0 && pseudoMET != 0 ) {
double genMT = sqrt( 2 * leadingLepton->pt() * pseudoMET->pt() * ( 1 - cos(leadingLepton->phi() - pseudoMET->phi() ) ) );
if (genMT > minWMt_) passesWMT = true;
}
// Jets
unsigned int numberGoodJets = 0;
unsigned int numberGoodBJets = 0;
for ( unsigned int jetIndex = 0; jetIndex < pseudoJets.size(); ++ jetIndex ) {
const JetPointer jet = pseudoJets.at(jetIndex);
// Check if this is a good jet
if ( jet->pt() > minJetPt_ && fabs(jet->eta()) < maxJetAbsEta_ ) {
++numberGoodJets;
// Check if this is also a good b jet
if ( fabs( jet->partonFlavour() ) == 5 ) {
++numberGoodBJets;
}
}
}
if ( numberGoodLeptons == 1 && numberVetoLeptons <= 1 && passesNeutrinoSumPt && passesWMT && numberGoodJets >= minNJets_ && numberGoodBJets >= minNBJets_ ) {
return true;
}
else return false;
}
unsigned short Particle::getClosest(const ParticleCollection& particles) const {
unsigned short idOfClosest = 999;
double closestDR = 999.;
for (unsigned short index = 0; index < particles.size(); ++index) {
double DR = deltaR(particles.at(index));
if (DR < closestDR) {
closestDR = DR;
idOfClosest = index;
}
}
return idOfClosest;
}
void PseudoTopAnalyser::analyse(const EventPtr event) {
weight_ = event->weight();
treeMan_->setCurrentFolder(histogramFolder_);
// Store gen selection criteria
treeMan_->Fill("isSemiLeptonicElectron", event->isSemiLeptonicElectron());
treeMan_->Fill("isSemiLeptonicMuon", event->isSemiLeptonicMuon());
const PseudoTopParticlesPointer pseudoTopParticles = event->PseudoTopParticles();
const MCParticleCollection pseudoTops = pseudoTopParticles->getPseudoTops();
const MCParticlePointer pseudoLeptonicW = pseudoTopParticles->getPseudoLeptonicW();
const MCParticlePointer pseudoLepton = pseudoTopParticles->getPseudoLepton();
const ParticleCollection allPseudoLeptons = pseudoTopParticles->getAllPseudoLeptons();
const MCParticleCollection pseudoBs = pseudoTopParticles->getPseudoBs();
const ParticlePointer pseudoMET = pseudoTopParticles->getPseudoMET();
const ParticlePointer pseudoNeutrino = pseudoTopParticles->getPseudoNeutrino();
const JetCollection pseudoJets = pseudoTopParticles->getPseudoJets();
ParticleCollection pseudoTopsForTTbar;
// // Only consider events with two pseudo tops
// if ( pseudoTops.size() != 2 ) return;
// // Also only consider events that are semi leptonic at the pseudo top level
// if ( !pseudoTopParticles->isSemiLeptonic() ) return;
// Check if event passes event selection (at pseudo top level)
if ( passesEventSelection( pseudoLepton, pseudoNeutrino, pseudoJets, pseudoBs, allPseudoLeptons, pseudoMET ) ) {
treeMan_->Fill("passesGenEventSelection",1);
}
else {
treeMan_->Fill("passesGenEventSelection",0);
}
//
// TOP VARIABLES
// Top reco at particle level performed
//
// Store info on top
for ( unsigned int ptIndex = 0; ptIndex < pseudoTops.size(); ++ ptIndex ) {
// cout << "Getting pseudo top number : " << ptIndex << endl;
const ParticlePointer pseudoTop = pseudoTops[ptIndex];
pseudoTopsForTTbar.push_back( pseudoTop );
treeMan_->Fill("pseudoTop_pT", pseudoTop->pt() );
treeMan_->Fill("pseudoTop_y", pseudoTop->rapidity() );
}
if( pseudoTopsForTTbar.size() == 2 ) {
// Store info on ttbar
ParticlePointer pseudoTTbar( new Particle( *pseudoTopsForTTbar[0] + *pseudoTopsForTTbar[1] ) );
treeMan_->Fill("pseudoTTbar_pT", pseudoTTbar->pt() );
treeMan_->Fill("pseudoTTbar_y", pseudoTTbar->rapidity() );
treeMan_->Fill("pseudoTTbar_m", pseudoTTbar->mass() );
}
// Store info on Bs
if ( pseudoBs.size() == 2 ) {
unsigned int leadingPsuedoBIndex = 0;
if ( pseudoBs[1]->pt() > pseudoBs[0]->pt() ) {
leadingPsuedoBIndex = 1;
}
unsigned int subleadingPsuedoBIndex = ( leadingPsuedoBIndex == 0 ) ? 1 : 0;
treeMan_->Fill("pseudoB_pT", pseudoBs[leadingPsuedoBIndex]->pt() );
treeMan_->Fill("pseudoB_eta", pseudoBs[leadingPsuedoBIndex]->eta() );
treeMan_->Fill("pseudoB_pT", pseudoBs[subleadingPsuedoBIndex]->pt() );
treeMan_->Fill("pseudoB_eta", pseudoBs[subleadingPsuedoBIndex]->eta() );
// for ( unsigned int pbIndex = 0; pbIndex < pseudoBs.size(); ++pbIndex ) {
// treeMan_->Fill("pseudoB_pT", pseudoBs[pbIndex]->pt() );
// treeMan_->Fill("pseudoB_eta", pseudoBs[pbIndex]->eta() );
// }
}
//
// GLOBAL VARIABLES
// No top reco at particle level
//
if ( allPseudoLeptons.size() > 0 ) {
// Store info on lepton
treeMan_->Fill("pseudoLepton_pT", allPseudoLeptons[0]->pt() );
treeMan_->Fill("pseudoLepton_eta", allPseudoLeptons[0]->eta() );
}
// Store pseudo MET
if ( pseudoMET != 0 ) {
treeMan_->Fill("pseudoMET", pseudoMET->et() );
METAlgorithm::value metType = (METAlgorithm::value) 0;
const METPointer met(event->MET(metType));
if ( pseudoMET->et() <= 0 && met->et() > 0 ) {
}
treeMan_->Fill("pseudoMET_mass", pseudoMET->mass() );
}
// Store pseudo HT
treeMan_->Fill("pseudoHT", event->HT( pseudoJets ) );
// Store pseudo ST
if ( allPseudoLeptons.size() > 0 ) {
treeMan_->Fill("pseudoST", event->ST( pseudoJets, allPseudoLeptons[0], METPointer( new MET( pseudoMET->px(), pseudoMET->py() )) ) );
}
// Store pseudo MT and WPT
// These are from the W reconstructed from the pseudo particles
// i.e. use the neutrino assocaited with the W rather than the more "global" MET
if ( pseudoLeptonicW != 0 ) {
treeMan_->Fill("pseudoWPT_reco", pseudoLeptonicW->pt() );
}
if ( pseudoMET != 0 && allPseudoLeptons.size() > 0 ) {
double WPT = event->WPT( allPseudoLeptons[0], METPointer( new MET( pseudoMET->px(), pseudoMET->py() )) );
treeMan_->Fill("pseudoWPT", WPT );
double MT = event->MT( allPseudoLeptons[0], METPointer( new MET( pseudoMET->px(), pseudoMET->py() )) );
treeMan_->Fill("pseudoMT", MT );
}
}