C++ Tower::P4方法代码示例

void printJet(Jet *jet)
{

  GenParticle *particle;
  Muon *muon;

  Track *track;
  Tower *tower;

  TObject *object;
  TLorentzVector momentum;
      momentum.SetPxPyPzE(0.0, 0.0, 0.0, 0.0);
      //TRefArray constituentarray(jet->Constituents);
      TRefArray particlearray(jet->Particles);
      cout<<"Looping over jet constituents. Jet pt: "<<jet->PT<<", eta: "<<jet->Eta<<", phi: "<<jet->Phi<<endl;      

      // Loop over all jet's constituents
      for(Int_t j = 0; j < jet->Constituents.GetEntriesFast(); ++j)
      {
        object = jet->Constituents.At(j);
        // Check if the constituent is accessible
        if(object == 0) continue;

        if(object->IsA() == GenParticle::Class())
        {
          particle = (GenParticle*) object;
          cout << "    GenPart pt: " << particle->PT << ", eta: " << particle->Eta << ", phi: " << particle->Phi << endl;
          momentum += particle->P4();
        }
        else if(object->IsA() == Track::Class())
        {
          track = (Track*) object;
          cout << "    Track pt: " << track->PT << ", eta: " << track->Eta << ", phi: " << track->Phi << endl;
          momentum += track->P4();
        }
        else if(object->IsA() == Tower::Class())
        {
          tower = (Tower*) object;
          cout << "    Tower pt: " << tower->ET << ", eta: " << tower->Eta << ", phi: " << tower->Phi << endl;
          momentum += tower->P4();
        }
        else if(object->IsA() == Muon::Class())
        {
          muon = (Muon*) object;
          cout << "    Muon pt: " << muon->PT << ", eta: " << muon->Eta << ", phi: " << muon->Phi << endl;
          momentum += muon->P4();
        }
      }
      cout << " constituent sum pt:  " << momentum.Pt() <<" eta "<< momentum.Eta()  <<"  phi " << momentum.Phi() << std::endl;


      for (Int_t j =0; j<jet->Particles.GetEntries();  j++){
     		GenParticle *p_tmp = (GenParticle*) particlearray.At(j);
		printGenParticle(p_tmp);
	}
}

//.........这里部分代码省略.........
  Float_t Eem, Ehad;
  Bool_t skip;

  Long64_t entry;

  Int_t i, j, pdgCode;

  // Loop over all events
  for(entry = 0; entry < allEntries; ++entry)
  {
    // Load selected branches with data from specified event
    treeReader->ReadEntry(entry);

    // Loop over all electrons in event
    for(i = 0; i < branchElectron->GetEntriesFast(); ++i)
    {
      electron = (Electron*) branchElectron->At(i);
      particle = (GenParticle*) electron->Particle.GetObject();

      plots->fElectronDeltaPT->Fill((particle->PT - electron->PT)/particle->PT);
      plots->fElectronDeltaEta->Fill((particle->Eta - electron->Eta)/particle->Eta);
    }

    // Loop over all photons in event
    for(i = 0; i < branchPhoton->GetEntriesFast(); ++i)
    {
      photon = (Photon*) branchPhoton->At(i);

      // skip photons with references to multiple particles
      if(photon->Particles.GetEntriesFast() != 1) continue;

      particle = (GenParticle*) photon->Particles.At(0);

      plots->fPhotonDeltaPT->Fill((particle->PT - photon->PT)/particle->PT);
      plots->fPhotonDeltaEta->Fill((particle->Eta - photon->Eta)/particle->Eta);
      plots->fPhotonDeltaE->Fill((particle->E - photon->E)/particle->E);
    }

    // Loop over all muons in event
    for(i = 0; i < branchMuon->GetEntriesFast(); ++i)
    {
      muon = (Muon*) branchMuon->At(i);
      particle = (GenParticle*) muon->Particle.GetObject();

      plots->fMuonDeltaPT->Fill((particle->PT - muon->PT)/particle->PT);
      plots->fMuonDeltaEta->Fill((particle->Eta - muon->Eta)/particle->Eta);
    }

    // Loop over all tracks in event
    for(i = 0; i < branchTrack->GetEntriesFast(); ++i)
    {
      track = (Track*) branchTrack->At(i);
      particle = (GenParticle*) track->Particle.GetObject();

      plots->fTrackDeltaPT->Fill((particle->PT - track->PT)/particle->PT);
      plots->fTrackDeltaEta->Fill((particle->Eta - track->Eta)/particle->Eta);
    }

    // cout << "--  New event -- " << endl;

    // Loop over all jets in event
    for(i = 0; i < branchJet->GetEntriesFast(); ++i)
    {
      jet = (Jet*) branchJet->At(i);

      momentum.SetPxPyPzE(0.0, 0.0, 0.0, 0.0);

      // cout<<"Looping over jet constituents. Jet pt: "<<jet->PT<<", eta: "<<jet->Eta<<", phi: "<<jet->Phi<<endl;

      // Loop over all jet's constituents
      for(j = 0; j < jet->Constituents.GetEntriesFast(); ++j)
      {
        object = jet->Constituents.At(j);

        // Check if the constituent is accessible
        if(object == 0) continue;

        if(object->IsA() == GenParticle::Class())
        {
          particle = (GenParticle*) object;
          // cout << "    GenPart pt: " << particle->PT << ", eta: " << particle->Eta << ", phi: " << particle->Phi << endl;
          momentum += particle->P4();
        }
        else if(object->IsA() == Track::Class())
        {
          track = (Track*) object;
          // cout << "    Track pt: " << track->PT << ", eta: " << track->Eta << ", phi: " << track->Phi << endl;
          momentum += track->P4();
        }
        else if(object->IsA() == Tower::Class())
        {
          tower = (Tower*) object;
          // cout << "    Tower pt: " << tower->ET << ", eta: " << tower->Eta << ", phi: " << tower->Phi << endl;
          momentum += tower->P4();
        }
      }
      plots->fJetDeltaPT->Fill((jet->PT - momentum.Pt())/jet->PT);
    }
  }
}

void LHCOWriter::AnalyseMuons()
{
  Muon *element;
  Track *track;
  Tower *tower;
  Jet *jet;
  Int_t muonCounter, tauCounter, jetCounter, minIndex;
  Float_t sumPT, sumET, ratET, jetDR, minDR;

  muonCounter = 0;
  fItMuon->Reset();
  while((element = static_cast<Muon*>(fItMuon->Next())))
  {
    Reset();

    sumPT = 0.0;
    fItTrack->Reset();
    while((track = static_cast<Track*>(fItTrack->Next())))
    {
      if(element->P4().DeltaR(track->P4()) < 0.5) sumPT += track->PT;
    }

    sumET = 0.0;
    fItTower->Reset();
    while((tower = static_cast<Tower*>(fItTower->Next())))
    {
      if(element->P4().DeltaR(tower->P4()) < 0.5) sumET += tower->ET;
    }

    tauCounter = 0;
    jetCounter = 0;
    minIndex = -1;
    minDR = 1.0E9;
    fItJet->Reset();
    while((jet = static_cast<Jet*>(fItJet->Next())))
    {
      if(jet->TauTag != 0)
      {
        ++tauCounter;
        continue;
      }

      jetDR = element->P4().DeltaR(jet->P4());
      if(jetDR < minDR)
      {
        minIndex = jetCounter;
        minDR = jetDR;
      }
      ++jetCounter;
    }

    fIntParam[1] = 2;

    fDblParam[0] = element->Eta;
    fDblParam[1] = element->Phi;
    fDblParam[2] = element->PT;

    fDblParam[3] = 0.11;

    fDblParam[4] = element->Charge;

    if(minIndex >= 0)
    {
      fDblParam[5] = fIntParam[0] + fBranchMuon->GetEntriesFast() - muonCounter + tauCounter + minIndex;
    }

    ratET = sumET/element->PT;
    fDblParam[6] = Float_t(TMath::Nint(sumPT)) + (ratET < 1.0 ? ratET : 0.99);

    Write();
    ++muonCounter;
  }
}