double EventWeightProvider::reweightTopPt(const EventPtr event) {
const MCParticleCollection genPart(event->GenParticles());
double topPt = 0.;
double tbarPt = 0.;
for (unsigned int i = 0; i < genPart.size(); i++) {
if (genPart.at(i)->pdgId() == (6))
topPt = genPart.at(i)->pt();
if (genPart.at(i)->pdgId() == (-6))
tbarPt = genPart.at(i)->pt();
}
double SFtop = exp(0.159-0.00141*topPt);
double SFtbar = exp(0.159-0.00141*tbarPt);
double weight=sqrt(SFtop*SFtbar);
return weight;
}
void MCAnalyser::analyse(const EventPtr event) {
histMan_->setCurrentHistogramFolder("MCStudy");
MCParticlePointer top, antitop, b_from_top, b_from_antitop, W_plus, W_minus, electron, neutrino, quark_from_W,
antiquark_from_W;
JetCollection genJets = event->GenJets();
JetPointer topBjet, antitopBjet, jet1fromW, jet2fromW;
bool ejets_event = false;
bool leptonic_Wplus_found = false, leptonic_Wminus_found = false;
bool hadronic_Wplus_found = false, hadronic_Wminus_found = false;
// bool fully_hadronic_event = false, fully_leptonic_event = false;
bool non_electron_leptonic_channel = false;
int index = 0;
int top_index = -100, antitop_index = -100, W_plus_index = -100, W_minus_index = -100;//, electron_index = -100,
// neutrino_index = -100, b_from_top_index = -100, b_from_antitop_index = -100, quark_from_W_index = -100,
// antiquark_from_W_index = -100;
//TODO: change from iterator to index: std::vectors have constant time for index = no gain using iterators
// MC ttbar reconstruction
for (MCParticleCollection::const_iterator mc_particle = event->GenParticles().begin();
mc_particle != event->GenParticles().end(); ++mc_particle, ++index) {
if ((*mc_particle)->status() != 3)
continue;
//top quark
if ((*mc_particle)->pdgId() == 6) {
top = *mc_particle;
top_index = index;
continue;
}
//anti-top quark
if ((*mc_particle)->pdgId() == -6) {
antitop = *mc_particle;
antitop_index = index;
continue;
}
//W+/W- bosons
if (((*mc_particle)->pdgId() == 24) && ((*mc_particle)->motherIndex() == top_index)) {
W_plus = *mc_particle;
W_plus_index = index;
continue;
}
if (((*mc_particle)->pdgId() == -24) && ((*mc_particle)->motherIndex() == antitop_index)) {
W_minus = *mc_particle;
W_minus_index = index;
continue;
}
//b-quarks
if (((*mc_particle)->pdgId() == 5) && ((*mc_particle)->motherIndex() == top_index)) {
b_from_top = *mc_particle;
// b_from_top_index = index;
continue;
}
if (((*mc_particle)->pdgId() == -5) && ((*mc_particle)->motherIndex() == antitop_index)) {
b_from_antitop = *mc_particle;
// b_from_antitop_index = index;
continue;
}
//W+ decay products
if ((*mc_particle)->motherIndex() == W_plus_index) {
if ((*mc_particle)->pdgId() == -11) {
electron = *mc_particle;
// electron_index = index;
leptonic_Wplus_found = true;
}
else if ((*mc_particle)->pdgId() == 12) {
neutrino = *mc_particle;
// neutrino_index = index;
leptonic_Wplus_found = true;
}
else if ((*mc_particle)->isLepton()) {
non_electron_leptonic_channel = true;
leptonic_Wplus_found = true;
}
else if ((*mc_particle)->isQuark() && ((*mc_particle)->pdgId() > 0)) {
quark_from_W = *mc_particle;
// quark_from_W_index = index;
hadronic_Wplus_found = true;
}
else if ((*mc_particle)->isQuark() && ((*mc_particle)->pdgId() < 0)) {
antiquark_from_W = *mc_particle;
// antiquark_from_W_index = index;
hadronic_Wplus_found = true;
}
else {
cout << "Something went wrong: W+ has unusual decay products." << endl;
}
}
//W- decay products
if ((*mc_particle)->motherIndex() == W_minus_index) {
if ((*mc_particle)->pdgId() == 11) {
electron = *mc_particle;
// electron_index = index;
leptonic_Wminus_found = true;
}
else if ((*mc_particle)->pdgId() == -12) {
neutrino = *mc_particle;
// neutrino_index = index;
leptonic_Wminus_found = true;
}
else if ((*mc_particle)->isLepton()) {
leptonic_Wminus_found = true;
non_electron_leptonic_channel = true;
}
else if ((*mc_particle)->isQuark() && ((*mc_particle)->pdgId() > 0)) {
quark_from_W = *mc_particle;
// quark_from_W_index = index;
hadronic_Wminus_found = true;
}
else if ((*mc_particle)->isQuark() && ((*mc_particle)->pdgId() < 0)) {
antiquark_from_W = *mc_particle;
// antiquark_from_W_index = index;
hadronic_Wminus_found = true;
}
else {
cout << "Something went wrong: W- has unusual decay products." << endl;
}
}
}
//classify the event
if (((leptonic_Wplus_found) || (leptonic_Wminus_found)) && ((hadronic_Wplus_found) || (hadronic_Wminus_found))
&& (!non_electron_leptonic_channel)) {
ejets_event = true;
mcEvent.decayChannel = Decay::electronPlusJets;
}
if (((leptonic_Wplus_found) || (leptonic_Wminus_found)) && (!hadronic_Wplus_found) && (!hadronic_Wminus_found)) {
// fully_leptonic_event = true;
mcEvent.decayChannel = Decay::fullyLeptonic;
}
if (((hadronic_Wplus_found) || (hadronic_Wminus_found)) && (!leptonic_Wplus_found) && (!leptonic_Wminus_found)) {
// fully_hadronic_event = true;
mcEvent.decayChannel = Decay::fullyHadronic;
}
if (ejets_event) {
//matching genJets and partons
if (genJets.size() > 0) {
int closestJetQuarkFromWIndex = quark_from_W->getClosestJetIndex(genJets);
float minDR_quarkW = quark_from_W->deltaR(genJets.at(closestJetQuarkFromWIndex));
jet1fromW = genJets.at(closestJetQuarkFromWIndex);
int closestJetAntiQuarkFromWIndex = antiquark_from_W->getClosestJetIndex(genJets);
float minDR_antiquarkW = antiquark_from_W->deltaR(genJets.at(closestJetAntiQuarkFromWIndex));
jet2fromW = genJets.at(closestJetAntiQuarkFromWIndex);
int closestJetBfromTopIndex = b_from_top->getClosestJetIndex(genJets);
float minDR_BfromTop = b_from_top->deltaR(genJets.at(closestJetBfromTopIndex));
topBjet = genJets.at(closestJetBfromTopIndex);
int closestJetBfromAntiTopIndex = b_from_antitop->getClosestJetIndex(genJets);
float minDR_BfromAntiTop = b_from_antitop->deltaR(genJets.at(closestJetBfromAntiTopIndex));
antitopBjet = genJets.at(closestJetBfromAntiTopIndex);
//delta R between genJets and partons histograms
histMan_->H1D("deltaRjet1")->Fill(minDR_quarkW);
histMan_->H1D("deltaRjet2")->Fill(minDR_antiquarkW);
histMan_->H1D("deltaRjet3")->Fill(minDR_BfromTop);
histMan_->H1D("deltaRjet4")->Fill(minDR_BfromAntiTop);
histMan_->H1D("deltaRjet_sum")->Fill(minDR_quarkW);
histMan_->H1D("deltaRjet_sum")->Fill(minDR_antiquarkW);
histMan_->H1D("deltaRjet_sum")->Fill(minDR_BfromTop);
histMan_->H1D("deltaRjet_sum")->Fill(minDR_BfromAntiTop);
}
if (leptonic_Wplus_found) {
mcEvent.leptonicTop = (ParticlePointer) top;
mcEvent.hadronicTop = (ParticlePointer) antitop;
mcEvent.leptonicW = (ParticlePointer) W_plus;
mcEvent.hadronicW = (ParticlePointer) W_minus;
mcEvent.leptonicBjet = topBjet;
mcEvent.hadronicBJet = antitopBjet;
mcEvent.jet1FromW = jet1fromW;
mcEvent.jet2FromW = jet2fromW;
mcEvent.neutrinoFromW = (ParticlePointer) neutrino;
ElectronPointer e(new Electron(electron->energy(), electron->px(), electron->py(), electron->pz()));
mcEvent.leptonFromW = e;
} else if (hadronic_Wplus_found) {
mcEvent.leptonicTop = (ParticlePointer) antitop;
mcEvent.hadronicTop = (ParticlePointer) top;
mcEvent.leptonicW = (ParticlePointer) W_minus;
mcEvent.hadronicW = (ParticlePointer) W_plus;
mcEvent.leptonicBjet = antitopBjet;
mcEvent.hadronicBJet = topBjet;
mcEvent.jet1FromW = jet1fromW;
mcEvent.jet2FromW = jet2fromW;
mcEvent.neutrinoFromW = (ParticlePointer) neutrino;
ElectronPointer e(new Electron(electron->energy(), electron->px(), electron->py(), electron->pz()));
mcEvent.leptonFromW = e;
} else
cout << "ERROR: no hadronic or leptonic W's in semileptonic event (nonsense).\n";
//comparing deltaR between genJets from W and closest partons
histMan_->H2D("deltaR_genJets_partons")->Fill(mcEvent.jet1FromW->deltaR(mcEvent.jet2FromW),
quark_from_W->deltaR(antiquark_from_W));
//invariant mass histograms
histMan_->H1D("W_inv_mass_from_truth_partons")->Fill(quark_from_W->invariantMass(antiquark_from_W));
histMan_->H1D("W_inv_mass_from_genJets")->Fill(mcEvent.jet1FromW->invariantMass(mcEvent.jet2FromW));
histMan_->H1D("top_leptonic_inv_mass_from_truth")->Fill(mcEvent.leptonicW->invariantMass(mcEvent.leptonicBjet));
histMan_->H1D("top_hadronic_inv_mass_from_truth")->Fill(mcEvent.hadronicW->invariantMass(mcEvent.hadronicBJet));
histMan_->H1D("m3_mc")->Fill(mcEvent.M3());
// comparing truth and reco objects
if (topEplusJetsRefSelection_->passesFullSelectionExceptLastTwoSteps(event)) {
const JetCollection jets = topEplusJetsRefSelection_->cleanedJets(event);
LeptonPointer selectedElectron = topEplusJetsRefSelection_->signalLepton(event);
METPointer met = event->MET();
histMan_->H1D("m3_diff")->Fill(fabs(mcEvent.M3() - TtbarHypothesis::M3(jets)));
boost::scoped_ptr<ChiSquaredBasedTopPairReconstruction> chi2Reco(
new ChiSquaredBasedTopPairReconstruction(selectedElectron, met, jets));
if (!chi2Reco->meetsInitialCriteria()) { //reports details on failure and skips event
cout << chi2Reco->getDetailsOnFailure();
return;
}
TtbarHypothesisPointer bestTopHypothesis = chi2Reco->getBestSolution();
double deltaRElectron = mcEvent.leptonFromW->deltaR(bestTopHypothesis->leptonFromW);
double deltaRLeptonicBjet = mcEvent.leptonicBjet->deltaR(bestTopHypothesis->leptonicBjet);
double deltaRHadronicBjet = mcEvent.hadronicBJet->deltaR(bestTopHypothesis->hadronicBJet);
double deltaRjet11fromW = mcEvent.jet1FromW->deltaR(bestTopHypothesis->jet1FromW);
double deltaRjet12fromW = mcEvent.jet1FromW->deltaR(bestTopHypothesis->jet2FromW);
double deltaRjet21fromW = mcEvent.jet2FromW->deltaR(bestTopHypothesis->jet1FromW);
double deltaRjet22fromW = mcEvent.jet2FromW->deltaR(bestTopHypothesis->jet2FromW);
double deltaRjet1fromW = 0;
double deltaRjet2fromW = 0;
if (deltaRjet11fromW < deltaRjet12fromW)
deltaRjet1fromW = deltaRjet11fromW;
else
deltaRjet1fromW = deltaRjet12fromW;
if (deltaRjet21fromW < deltaRjet22fromW)
deltaRjet2fromW = deltaRjet21fromW;
else
deltaRjet2fromW = deltaRjet22fromW;
double deltaEtaNeutrino = mcEvent.neutrinoFromW->deltaEta(bestTopHypothesis->neutrinoFromW);
double deltaPhiNeutrino = mcEvent.neutrinoFromW->deltaPhi(bestTopHypothesis->neutrinoFromW);
histMan_->H1D("deltaEtaNeutrino")->Fill(deltaEtaNeutrino);
histMan_->H1D("deltaPhiNeutrino")->Fill(deltaPhiNeutrino);
histMan_->H1D("deltaRElectron")->Fill(deltaRElectron);
histMan_->H1D("deltaRLeptonicBjet")->Fill(deltaRLeptonicBjet);
histMan_->H1D("deltaRHadronicBjet")->Fill(deltaRHadronicBjet);
histMan_->H1D("deltaRjet1fromW")->Fill(deltaRjet1fromW);
histMan_->H1D("deltaRjet2fromW")->Fill(deltaRjet2fromW);
histMan_->H1D("deltaRsum")->Fill(
deltaRElectron + deltaRLeptonicBjet + deltaRHadronicBjet + deltaRjet1fromW + deltaRjet2fromW);
}
}
}
