//________________________________________________________________________
AliGenMUONCocktail::AliGenMUONCocktail()
- :AliGenCocktail()
+ :AliGenCocktail(),
+ fFastGlauber (0x0),
+ fTotalRate(0),
+ fMuonMultiplicity(1),
+ fMuonPtCut(1.),
+ fMuonThetaMinCut(171.),
+ fMuonThetaMaxCut(178.),
+ fNSucceded(0),
+ fNGenerated(0),
+ fLowImpactParameter(0.),
+ fHighImpactParameter(5.),
+ fAverageImpactParameter(0.),
+ fNumberOfCollisions(0.),
+ fNumberOfParticipants(0.),
+ fHadronicMuons(kTRUE),
+ fInvMassCut (kFALSE),
+ fInvMassMinCut (0.),
+ fInvMassMaxCut (100.)
{
// Constructor
- fFastGlauber =0x0;
- fTotalRate =0;
- fNSucceded=0;
- fNGenerated=0;
- fMuonMultiplicity=1;
- fMuonPtCut= 1.;
- fMuonThetaMinCut=171.;
- fMuonThetaMaxCut=178.;
- fLowImpactParameter = 0.;
- fHighImpactParameter = 5.;
- fAverageImpactParameter =0.;
- fNumberOfCollisions = 0.;
- fNumberOfParticipants = 0.;
- fHadronicMuons = kTRUE;
-}
-//_________________________________________________________________________
-AliGenMUONCocktail::AliGenMUONCocktail(const AliGenMUONCocktail & cocktail):
- AliGenCocktail(cocktail)
-{
-// Copy constructor
- fFastGlauber =0x0;
- fTotalRate =0;
- fNSucceded=0;
- fNGenerated=0;
- fMuonMultiplicity=1;
- fMuonPtCut= 1.;
- fMuonThetaMinCut=171.;
- fMuonThetaMaxCut=178.;
- fLowImpactParameter = 0.;
- fHighImpactParameter = 5.;
- fAverageImpactParameter =0.;
- fNumberOfCollisions = 0.;
- fNumberOfParticipants = 0.;
- fHadronicMuons = kTRUE;
}
//_________________________________________________________________________
AliGenMUONCocktail::~AliGenMUONCocktail()
Double_t sigmaReaction = 0.072; // MinBias NN cross section for PbPb LHC energies http://arxiv.org/pdf/nucl-ex/0302016
// Initialising Fast Glauber object
- fFastGlauber = new AliFastGlauber();
+ fFastGlauber = AliFastGlauber::Instance();
fFastGlauber->SetPbPbLHC();
fFastGlauber->SetNNCrossSection(sigmaReaction*1000.); //Expected NN cross-section in mb at LHC with diffractive part http://arxiv.org/pdf/nucl-ex/0302016 )
fFastGlauber->Init(1);
// Generate event
TIter next(fEntries);
AliGenCocktailEntry *entry = 0;
- AliGenCocktailEntry *preventry = 0;
AliGenerator* gen = 0;
- TObjArray *partArray = gAlice->GetMCApp()->Particles();
+ const TObjArray *partArray = gAlice->GetMCApp()->Particles();
// Generate the vertex position used by all generators
if(fVertexSmear == kPerEvent) Vertex();
// Loop on primordialTrigger
Bool_t primordialTrigger = kFALSE;
while(!primordialTrigger) {
- //Reseting stack
- AliRunLoader * runloader = gAlice->GetRunLoader();
- if (runloader)
- if (runloader->Stack())
- runloader->Stack()->Reset();
- // Loop over generators and generate events
- Int_t igen=0;
- Int_t npart =0;
- while((entry = (AliGenCocktailEntry*)next())) {
- gen = entry->Generator();
- gen->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2));
- if ( (npart = gRandom->Poisson(entry->Rate())) >0 ) {
- igen++;
- if (igen ==1) entry->SetFirst(0);
- else entry->SetFirst((partArray->GetEntriesFast())+1);
- // if ( (fHadronicMuons == kFALSE) && ( (gen->GetName() == "Pions") || (gen->GetName() == "Kaons") ) )
- // { AliInfo(Form("This generator %s is finally not generated. This is option for hadronic muons.",gen->GetName() ) ); }
- // else {
- gen->SetNumberParticles(npart);
- gen->Generate();
- entry->SetLast(partArray->GetEntriesFast());
- preventry = entry;
- // }
- }
- }
- next.Reset();
- // Tesitng primordial trigger : Muon pair in the MUON spectrometer acceptance and pTCut
- Int_t iPart;
- fNGenerated++;
- Int_t numberOfMuons=0;
- // printf(">>>fNGenerated is %d\n",fNGenerated);
- for(iPart=0; iPart<partArray->GetEntriesFast(); iPart++){
- if ( (TMath::Abs(gAlice->GetMCApp()->Particle(iPart)->GetPdgCode())==13) &&
- (gAlice->GetMCApp()->Particle(iPart)->Theta()*180./TMath::Pi()>fMuonThetaMinCut) &&
- (gAlice->GetMCApp()->Particle(iPart)->Theta()*180./TMath::Pi()<fMuonThetaMaxCut) &&
- (gAlice->GetMCApp()->Particle(iPart)->Pt()>fMuonPtCut) ) {
- gAlice->GetMCApp()->Particle(iPart)->SetProductionVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2), 0.);
- numberOfMuons++;
+ //Reseting stack
+ AliRunLoader * runloader = AliRunLoader::Instance();
+ if (runloader)
+ if (runloader->Stack())
+ runloader->Stack()->Clean();
+ // Loop over generators and generate events
+ Int_t igen=0;
+ Int_t npart =0;
+ while((entry = (AliGenCocktailEntry*)next())) {
+ gen = entry->Generator();
+ gen->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2));
+ gen->SetTime(fTime);
+ if ( (npart = gRandom->Poisson(entry->Rate())) >0 ) {
+ igen++;
+ if (igen == 1) entry->SetFirst(0);
+ else entry->SetFirst((partArray->GetEntriesFast())+1);
+ // if ( (fHadronicMuons == kFALSE) && ( (gen->GetName() == "Pions") || (gen->GetName() == "Kaons") ) )
+ // { AliInfo(Form("This generator %s is finally not generated. This is option for hadronic muons.",gen->GetName() ) ); }
+ // else {
+ gen->SetNumberParticles(npart);
+ gen->Generate();
+ entry->SetLast(partArray->GetEntriesFast());
+ // }
+ }
+ }
+ next.Reset();
+ // Testing primordial trigger : Muon pair in the MUON spectrometer acceptance and pTCut
+ Int_t iPart;
+ fNGenerated++;
+ Int_t numberOfMuons=0;
+ // printf(">>>fNGenerated is %d\n",fNGenerated);
+
+ TObjArray GoodMuons; // Used in the Invariant Mass selection cut
+
+ for(iPart=0; iPart<partArray->GetEntriesFast(); iPart++){
+
+ if ( (TMath::Abs(gAlice->GetMCApp()->Particle(iPart)->GetPdgCode())==13) &&
+ (gAlice->GetMCApp()->Particle(iPart)->Theta()*180./TMath::Pi()>fMuonThetaMinCut) &&
+ (gAlice->GetMCApp()->Particle(iPart)->Theta()*180./TMath::Pi()<fMuonThetaMaxCut) &&
+ (gAlice->GetMCApp()->Particle(iPart)->Pt()>fMuonPtCut) ) {
+ gAlice->GetMCApp()->Particle(iPart)->SetProductionVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2), fTime);
+ GoodMuons.AddLast(gAlice->GetMCApp()->Particle(iPart));
+ numberOfMuons++;
+ }
+ }
+
+ // Test the invariant mass of each pair (if cut on Invariant mass is required)
+ Bool_t InvMassRangeOK = kTRUE;
+ if(fInvMassCut && (numberOfMuons>=2) ){
+ TLorentzVector fV1, fV2, fVtot;
+ InvMassRangeOK = kFALSE;
+ for(iPart=0; iPart<GoodMuons.GetEntriesFast(); iPart++){
+ TParticle * mu1 = ((TParticle *)GoodMuons.At(iPart));
+
+ for(int iPart2=iPart+1; iPart2<GoodMuons.GetEntriesFast(); iPart2++){
+ TParticle * mu2 = ((TParticle *)GoodMuons.At(iPart2));
+
+ fV1.SetPxPyPzE(mu1->Px() ,mu1->Py() ,mu1->Pz() ,mu1->Energy() );
+ fV2.SetPxPyPzE(mu2->Px() ,mu2->Py() ,mu2->Pz() ,mu2->Energy() );
+ fVtot = fV1 + fV2;
+
+ if(fVtot.M()>fInvMassMinCut && fVtot.M()<fInvMassMaxCut) {
+ InvMassRangeOK = kTRUE;
+ break;
+ }
+ }
+ if(InvMassRangeOK) break; // Invariant Mass Cut pass as soon as one pair satisfy the criterion
+ }
+ }
+
+
+ if ((numberOfMuons >= fMuonMultiplicity) && InvMassRangeOK ) primordialTrigger = kTRUE;
}
- }
- // printf(">>> Number of Muons is %d \n", numberOfMuons);
- if (numberOfMuons >= fMuonMultiplicity ) primordialTrigger = kTRUE;
- }
fNSucceded++;
-
+
AliDebug(5,Form("Generated Events are %d and Succeeded Events are %d",fNGenerated,fNSucceded));
}
-
-
-
-
-
-
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff