Possibility to use KF vertexer (Andrea, Giuseppe); possibility to store results in...

[u/mrichter/AliRoot.git] / PWG3 / AliAnalysisVertexingHFTest.C

//--------------------------------------------------------------------------
// Test macro for reconstruction of heavy-flavour vertexing candidates
//
//     Andrea Dainese, andrea.dainese@lnl.infn.it
//--------------------------------------------------------------------------

void AliAnalysisVertexingHFTest(Int_t evFirst=0,
				Int_t evLast=0,
				TString infile="AliESDs.root",
				TString outfile="VertexingHF.root") {
  
  gSystem->Load("libAOD.so");
  gSystem->Load("libPWG3base.so");

  AliAnalysisVertexingHF *vHF = new AliAnalysisVertexingHF();
  //--- switch-off candidates finding (default: all on)
  //vHF->SetD0toKpiOff();
  //vHF->SetJPSItoEleOff();
  vHF->Set3ProngOff();
  vHF->Set4ProngOff();
  //--- secondary vertex with KF?
  //vHF->SetSecVtxWithKF();
  //--- set cuts for single-track selection
  vHF->SetITSrefitRequired();
  vHF->SetBothSPDNotRequired();
  vHF->SetMinITSCls(5);
  vHF->SetMinPtCut(0.);
  vHF->SetMind0Cut(0.);
  //--- set cuts for candidates selection
  //vHF->SetD0toKpiCuts(); 
  //vHF->SetBtoJPSICuts(); 
  //vHF->SetDplusCuts(); 
  //--- set this if you want to reconstruct primary vertex candidate by
  //    candidate using other tracks in the event (for pp, broad 
  //    interaction region)
  //vHF->SetRecoPrimVtxSkippingTrks();
  //--- OR set this if you want to remove the candidate daughters from 
  //    the primary vertex, without recostructing it from scratch
  //vHF->SetRmTrksFromPrimVtx();

  //--- check the settings
  vHF->PrintStatus();
  //--- verbose
  vHF->SetDebug(1);

  TTree *trees = new TTree[2];
  AliAODRecoDecayHF2Prong *rd2=0;
  //AliAODRecoDecayHF3Prong *rd3=0;
  //AliAODRecoDecayHF4Prong *rd4=0;
  trees[0].Branch("D0toKpi","AliAODRecoDecayHF2Prong",&rd2);
  trees[1].Branch("JPSItoEle","AliAODRecoDecayHF2Prong",&rd2);
  //trees[2].Branch("Charmto3Prong","AliAODRecoDecayHF3Prong",&rd3);
  //trees[3].Branch("D0to4Prong","AliAODRecoDecayHF4Prong",&rd4);

  TFile *inesd = new TFile(infile.Data());
  AliESDEvent *esd = new AliESDEvent();
  TTree *esdTree = (TTree*)inesd->Get("esdTree");
  esd->ReadFromTree(esdTree);

  if(esdTree->GetEntries()<evLast) evLast=esdTree->GetEntries()-1;
  for(Int_t i=evFirst; i<=evLast; i++) {
    esdTree->GetEvent(i);
    vHF->FindCandidates(esd,trees);
    //if(i==evLast) i=evFirst;
  }

  delete esdTree;
  inesd->Close();
  delete inesd;

  // Write trees with candidates
  TFile *fout = new TFile("AliAnalysisVertexingHF.root","recreate");
  trees[0].Write("TreeD0toKpi");
  trees[1].Write("TreeJPSItoEle");
  //trees[2].Write("TreeCharm3Prong");
  //trees[3].Write("TreeD0to4Prong");
  fout->Close();
  delete fout;

  return;
}