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();
}
void gen(Int_t nev = 1,
const char* genConfig = "$ALICE_ROOT/MUON/macros/genTestConfig.C")
{
// Load libraries
// gSystem->SetIncludePath("-I$ROOTSYS/include -I$ALICE_ROOT/include -I$ALICE_ROOT");
gSystem->Load("liblhapdf"); // Parton density functions
gSystem->Load("libEGPythia6"); // TGenerator interface
gSystem->Load("libpythia6"); // Pythia
gSystem->Load("libAliPythia6"); // ALICE specific implementations
AliPDG::AddParticlesToPdgDataBase();
TDatabasePDG::Instance();
// Run loader
AliRunLoader* rl = AliRunLoader::Open("galice.root","FASTRUN","recreate");
rl->SetCompressionLevel(2);
rl->SetNumberOfEventsPerFile(nev);
rl->LoadKinematics("RECREATE");
rl->MakeTree("E");
gAlice->SetRunLoader(rl);
// Create stack
rl->MakeStack();
AliStack* stack = rl->Stack();
// Header
AliHeader* header = rl->GetHeader();
// Create and Initialize Generator
gROOT->LoadMacro(genConfig);
AliGenerator* gener = genConfig();
// Go to galice.root
rl->CdGAFile();
// Forbid some decays. Do it after gener->Init(0, because
// the initialization of the generator includes reading of the decay table.
// ...
//
// Event Loop
//
TStopwatch timer;
timer.Start();
for (Int_t iev = 0; iev < nev; iev++) {
cout <<"Event number "<< iev << endl;
// Initialize event
header->Reset(0,iev);
rl->SetEventNumber(iev);
stack->Reset();
rl->MakeTree("K");
// Generate event
stack->Reset();
stack->ConnectTree(rl->TreeK());
gener->Generate();
cout << "Number of particles " << stack->GetNprimary() << endl;
// Finish event
header->SetNprimary(stack->GetNprimary());
header->SetNtrack(stack->GetNtrack());
// I/O
stack->FinishEvent();
header->SetStack(stack);
rl->TreeE()->Fill();
rl->WriteKinematics("OVERWRITE");
} // event loop
timer.Stop();
timer.Print();
// Termination
// Generator
gener->FinishRun();
// Write file
rl->WriteHeader("OVERWRITE");
gener->Write();
rl->Write();
}
void fastGen(Tune_t tune = kPyTuneCDFA , Float_t energy, Int_t nev = 1, TString process)
{
// Add all particles to the PDG database
AliPDG::AddParticlesToPdgDataBase();
// set the random seed
TDatime date;
UInt_t seed = date.Get()+gSystem->GetPid();
gRandom->SetSeed(seed);
cout<<"Seed for random number generation= "<<seed<<endl;
// Runloader
AliRunLoader* rl = AliRunLoader::Open("galice.root", "FASTRUN","recreate");
rl->SetCompressionLevel(2);
rl->SetNumberOfEventsPerFile(nev);
rl->LoadKinematics("RECREATE");
rl->MakeTree("E");
gAlice->SetRunLoader(rl);
// Create stack
rl->MakeStack();
AliStack* stack = rl->Stack();
// Header
AliHeader* header = rl->GetHeader();
//
// Create and Initialize Generator
AliGenerator *gener = CreateGenerator(tune,energy);
gener->Init();
// if nsd switch off single diffraction
if ( process == "NSD"){
if(tune != kPhojet) {
AliPythia::Instance()-> SetMSUB(92,0); // single diffraction AB-->XB
AliPythia::Instance()-> SetMSUB(93,0); // single diffraction AB-->AX
}
else {
cout << "NSD not yet implemented in the phojet case" << endl;
exit(1);
}
}
gener->SetStack(stack);
//
// Event Loop
//
Int_t iev;
for (iev = 0; iev < nev; iev++) {
if(!(iev%500)) printf("\n \n Event number %d \n \n", iev);
// Initialize event
header->Reset(0,iev);
rl->SetEventNumber(iev);
stack->Reset();
rl->MakeTree("K");
// stack->ConnectTree();
// Generate event
gener->Generate();
// Analysis
// Int_t npart = stack->GetNprimary();
// printf("Analyse %d Particles\n", npart);
// for (Int_t part=0; part<npart; part++) {
// TParticle *MPart = stack->Particle(part);
// Int_t mpart = MPart->GetPdgCode();
// printf("Particle %d\n", mpart);
// }
// Finish event
header->SetNprimary(stack->GetNprimary());
header->SetNtrack(stack->GetNtrack());
// I/O
//
stack->FinishEvent();
header->SetStack(stack);
rl->TreeE()->Fill();
rl->WriteKinematics("OVERWRITE");
} // event loop
//
// Termination
// Generator
gener->FinishRun();
// Write file
rl->WriteHeader("OVERWRITE");
gener->Write();
rl->Write();
}