AliGenerator* Hijing2000()
{
AliGenHijing *gener = (AliGenHijing*) Hijing();
gener->SetJetQuenching(0);
gener->SetPtHardMin (2.3);
return gener;
}
void createGlauberTree(Int_t nEvents,
const char *outFileName)
{
AliPDG::AddParticlesToPdgDataBase();
TDatabasePDG::Instance();
// Run loader
TFolder *folder = new TFolder("myfolder","myfolder");
AliRunLoader* rl = new AliRunLoader(folder);
rl->MakeHeader();
rl->MakeStack();
AliStack* stack = rl->Stack();
//AliHeader* rheader = rl->GetHeader();
AliGenHijing *genHi = new AliGenHijing(-1);
genHi->SetStack(stack);
genHi->SetEnergyCMS(2760);
genHi->SetReferenceFrame("CMS");
genHi->SetProjectile("A", 208, 82);
genHi->SetTarget ("A", 208, 82);
genHi->SetPtHardMin (2.3);
genHi->SetImpactParameterRange(0.,30);
genHi->SetJetQuenching(0); // enable jet quenching
genHi->SetShadowing(1); // enable shadowing
genHi->SetDecaysOff(1); // neutral pion and heavy particle decays switched off
genHi->Init();
MyHeader *myheader = new MyHeader;
MyResponse *myresp = new MyResponse;
TFile *outFile = TFile::Open(outFileName, "RECREATE");
outFile->SetCompressionLevel(5);
TDirectory::TContext context(outFile);
TTree *tree = new TTree("glaubertree", "Glauber tree");
tree->Branch("header",&myheader, 32*1024, 99);
tree->Branch("response",&myresp, 32*1024, 99);
TNtuple *ntuple = new TNtuple("gnt", "Glauber ntuple", "npart:ncoll:b");
Double_t etas[] = {-10,-5,-4,-3,-2,-1,0,1,2,3,4,5,10};
TH1D *hNEta = new TH1D("hNeta","",12,etas);
TH1D *hEtEta = new TH1D("hEteta","",12,etas);
// create events and fill them
for (Int_t iEvent = 0; iEvent < nEvents; ++iEvent) {
cout << "Event " << iEvent+1 << "/" << nEvents << endl;;
stack->Reset();
hNEta->Reset();
hEtEta->Reset();
genHi->Generate();
AliStack *s = genHi->GetStack();
const TObjArray *parts = s->Particles();
Int_t nents = parts->GetEntries();
for (Int_t i = 0; i<nents; ++i) {
TParticle *p = (TParticle*)parts->At(i);
//p->Print();
TParticlePDG *pdg = p->GetPDG(1);
Int_t c = (Int_t)(TMath::Abs(pdg->Charge()));
if (c!=0) {
hNEta->Fill(p->Eta());
hEtEta->Fill(p->Eta(),p->Pt());
}
}
AliGenHijingEventHeader *h = (AliGenHijingEventHeader*)genHi->CollisionGeometry();
myheader->fNATT = nents;
myheader->fEATT = h->TotalEnergy();
myheader->fJATT = h->HardScatters();
myheader->fNT = h->TargetParticipants();
myheader->fNP = h->ProjectileParticipants();
myheader->fN00 = h->NwNw();
myheader->fN01 = h->NwN();
myheader->fN10 = h->NNw();
myheader->fN11 = h->NN();
myheader->fBB = h->ImpactParameter();
myheader->fRP = h->ReactionPlaneAngle();
myheader->fPSn = h->ProjSpectatorsn();
myheader->fPSp = h->ProjSpectatorsp();
myheader->fTSn = h->TargSpectatorsn();
myheader->fTSp = h->TargSpectatorsn();
myresp->fEtch0p = hEtEta->GetBinContent(hEtEta->FindBin(0.5));
myresp->fEtch1p = hEtEta->GetBinContent(hEtEta->FindBin(1.5));
myresp->fEtch2p = hEtEta->GetBinContent(hEtEta->FindBin(2.5));
myresp->fEtch3p = hEtEta->GetBinContent(hEtEta->FindBin(3.5));
myresp->fEtch4p = hEtEta->GetBinContent(hEtEta->FindBin(4.5));
myresp->fEtch5p = hEtEta->GetBinContent(hEtEta->FindBin(5.5));
myresp->fEtchrp = hEtEta->GetBinContent(hEtEta->FindBin(10.5));
myresp->fEtch0n = hEtEta->GetBinContent(hEtEta->FindBin(-0.5));
myresp->fEtch1n = hEtEta->GetBinContent(hEtEta->FindBin(-1.5));
myresp->fEtch2n = hEtEta->GetBinContent(hEtEta->FindBin(-2.5));
myresp->fEtch3n = hEtEta->GetBinContent(hEtEta->FindBin(-3.5));
myresp->fEtch4n = hEtEta->GetBinContent(hEtEta->FindBin(-4.5));
myresp->fEtch5n = hEtEta->GetBinContent(hEtEta->FindBin(-5.5));
myresp->fEtchrn = hEtEta->GetBinContent(hEtEta->FindBin(-10.5));
myresp->fNch0p = hNEta->GetBinContent(hNEta->FindBin(0.5));
myresp->fNch1p = hNEta->GetBinContent(hNEta->FindBin(1.5));
myresp->fNch2p = hNEta->GetBinContent(hNEta->FindBin(2.5));
myresp->fNch3p = hNEta->GetBinContent(hNEta->FindBin(3.5));
myresp->fNch4p = hNEta->GetBinContent(hNEta->FindBin(4.5));
myresp->fNch5p = hNEta->GetBinContent(hNEta->FindBin(5.5));
myresp->fNchrp = hNEta->GetBinContent(hNEta->FindBin(10.5));
myresp->fNch0n = hNEta->GetBinContent(hNEta->FindBin(-0.5));
myresp->fNch1n = hNEta->GetBinContent(hNEta->FindBin(-1.5));
myresp->fNch2n = hNEta->GetBinContent(hNEta->FindBin(-2.5));
myresp->fNch3n = hNEta->GetBinContent(hNEta->FindBin(-3.5));
myresp->fNch4n = hNEta->GetBinContent(hNEta->FindBin(-4.5));
myresp->fNch5n = hNEta->GetBinContent(hNEta->FindBin(-5.5));
myresp->fNchrn = hNEta->GetBinContent(hNEta->FindBin(-10.5));
tree->Fill();
if (ntuple) {
Int_t np = h->TargetParticipants() + h->ProjectileParticipants();
Int_t nc = h->NwNw() + h->NwN() + h->NNw() + h->NN();
Double_t b = h->ImpactParameter();
ntuple->Fill(np,nc,b);
}
} // end of event loop
tree->Write();
ntuple->Write();
outFile->Close();
}
