void Example2(const char *inputFile)
{
gSystem->Load("libDelphes");
TChain *chain = new TChain("Delphes");
chain->Add(inputFile);
ExRootTreeReader *treeReader = new ExRootTreeReader(chain);
ExRootResult *result = new ExRootResult();
MyPlots *plots = new MyPlots;
BookHistograms(result, plots);
AnalyseEvents(treeReader, plots);
PrintHistograms(result, plots);
result->Write("results.root");
cout << "** Exiting..." << endl;
delete plots;
delete result;
delete treeReader;
delete chain;
}
void delphes(const char *inputFile, const char* outputFileName)
{
gSystem->Load("libDelphes");
TChain *chain = new TChain("Delphes");
chain->Add(inputFile);
ExRootTreeReader *treeReader = new ExRootTreeReader(chain);
ExRootResult *result = new ExRootResult();
TH1* hNJet = result->AddHist1D("hNJets", "Jet multiplicity", "Multiplicity", "Events", 20, 0., 20.);
TH1* hNLeptons = result->AddHist1D("hNLeptons", "Lepton multiplicity", "Multiplicity", "Events", 20, 0., 20.);
TH1* hJetPt = result->AddHist1D("hJetPt", "Jet pT", "Transverse momentum p_{T} (GeV/c)", "Entries per 10GeV/c", 50, 0., 500.);
TH1* hNBjets = result->AddHist1D("hNBjets", "B Jet multiplicity", "B jet multiplicity", "Events", 20, 0., 20.);
TH1* hBjetPt = result->AddHist1D("hBjetPt", "B jet pT", "Transverse momentum p_{T} (GeV/c)", "Entries per 10GeV/c", 50, 0., 500.);
TH1* hST = result->AddHist1D("hST", "ST", "Scalar sum S_{T} (GeV/c)", "Events per 500GeV/c", 40, 0., 20000.);
// Analyze
TClonesArray *branchJet = treeReader->UseBranch("Jet");
TClonesArray *branchElectron = treeReader->UseBranch("Electron");
TClonesArray *branchMuon = treeReader->UseBranch("Muon");
TClonesArray *branchMissingET = treeReader->UseBranch("MissingET");
int nEventsTotal = 0, nEvents4J = 0, nEvents2B = 0, nEvents3B = 0, nEvents4B = 0;
int nEvents4J2B = 0, nEvents6J2B = 0, nEvents6J3B = 0;
// Loop over all events
for(Long64_t entry = 0, allEntries = treeReader->GetEntries(); entry < allEntries; ++entry)
{
double sT = 0;
int nLeptons = 0, nJets = 0, nBjets = 0;
treeReader->ReadEntry(entry);
for ( int i=0, n=branchMuon->GetEntriesFast(); i<n; ++i )
{
const Muon* muon = (Muon*)branchMuon->At(i);
const double muonPt = muon->PT;
if ( muonPt < 50 || fabs(muon->Eta) > 2.5 ) continue;
sT += muonPt;
nLeptons += 1;
}
for ( int i=0, n=branchElectron->GetEntriesFast(); i<n; ++i )
{
const Electron* electron = (Electron*)branchElectron->At(i);
const double electronPt = electron->PT;
if ( electronPt < 50 || fabs(electron->Eta) > 2.5 ) continue;
sT += electronPt;
nLeptons += 1;
}
for ( int i=0, n=branchJet->GetEntriesFast(); i<n; ++i )
{
const Jet* jet = (Jet*)branchJet->At(i);
const double jetPt = jet->PT;
if ( jetPt < 50 ) continue;
if ( fabs(jet->Eta) > 2.5 ) continue;
++nJets;
hJetPt->Fill(jetPt);
sT += jetPt;
if ( !jet->BTag ) continue;
++nBjets;
hBjetPt->Fill(jetPt);
}
hNLeptons->Fill(nLeptons);
hNJets->Fill(nJets);
hNBjets->Fill(nBjets);
// Analyse missing ET
if( branchMissingET->GetEntriesFast() > 0 )
{
const MissingET* met = (MissingET*)branchMissingET->At(0);
sT += met->MET;
}
hST->Fill(sT);
++nEventsTotal;
if ( nJets >= 4 ) ++nEvents4J;
if ( nBjets >= 2 ) ++nEvents2B;
if ( nBjets >= 3 ) ++nEvents3B;
if ( nBjets >= 4 ) ++nEvents4B;
if ( nJets >= 4 && nBjets >= 2 ) ++nEvents4J2B;
if ( nJets >= 6 && nBjets >= 2 ) ++nEvents6J2B;
if ( nJets >= 6 && nBjets >= 3 ) ++nEvents6J3B;
}
cout << inputFile << endl;
cout << "nJet4 " << 1.*nEvents4J/nEventsTotal << endl;
cout << "nBjet2 " << 1.*nEvents2B/nEventsTotal << endl;
cout << "nBjet3 " << 1.*nEvents3B/nEventsTotal << endl;
cout << "nBjet4 " << 1.*nEvents4B/nEventsTotal << endl;
cout << "nJet4 nBjet2 " << 1.*nEvents4J2B/nEventsTotal << endl;
cout << "nJet6 nBjet2 " << 1.*nEvents6J2B/nEventsTotal << endl;
cout << "nJet6 nBjet3 " << 1.*nEvents6J3B/nEventsTotal << endl;
//result->Print("png");
result->Write(outputFileName);
delete result;
delete treeReader;
delete chain;
}