-void MUONcombi (Int_t evNumber=0)
+void MUONcombi (Int_t evNumber=0)
{
-/////////////////////////////////////////////////////////////////////////
-// This macro is a small example of a ROOT macro
-// illustrating how to read the output of GALICE
-// and fill some histograms.
-//
-// Root > .L anal.C //this loads the macro in memory
-// Root > anal(); //by default process first event
-// Root > anal(2); //process third event
-//Begin_Html
-/*
-<img src="gif/anal.gif">
-*/
-//End_Html
-/////////////////////////////////////////////////////////////////////////
+ const Float_t runWeight = 4.e8;
+
// Dynamically link some shared libs
- if (gClassTable->GetID("AliRun") < 0) {
- gSystem->Load("$ALITOP/cern.so/lib/libpdfDUMMY.so");
- gSystem->Load("$ALITOP/cern.so/lib/libPythia.so");
- gSystem->Load("$ROOTSYS/lib/libEG.so");
- gSystem->Load("$ROOTSYS/lib/libEGPythia.so");
- gSystem->Load("libGeant3Dummy.so"); //a dummy version of Geant3
- gSystem->Load("PHOS/libPHOSdummy.so"); //the standard Alice classes
- gSystem->Load("libgalice.so"); // the standard Alice classes
- }
-//
+ if (gClassTable->GetID("AliRun") < 0) {
+ gROOT->LoadMacro("loadlibs.C");
+ loadlibs();
+ } else {
+ delete gAlice;
+ gAlice = 0;
+ }
+
// Connect the Root Galice file containing Geometry, Kine and Hits
TFile *file = (TFile*)gROOT->GetListOfFiles()->FindObject("galice.root");
if (!file) file = new TFile("galice.root");
if (gAlice) printf("AliRun object found on file\n");
if (!gAlice) gAlice = new AliRun("gAlice","Alice test program");
}
-// TClonesArray &Partarray = *(gAlice->Particles());
- TClonesArray *PartArray = gAlice->Particles();
- GParticle *Part;
-
// Import the Kine and Hits Trees for the event evNumber in the file
Int_t nparticles = gAlice->GetEvent(evNumber);
if (nparticles <= 0) return;
//
//
- TH1F *dmass = new TH1F("dmass","Dimuon-Mass Distribution"
- ,50,0.,10.);
- TH1F *pt = new TH1F("pt","pT-single"
- ,50,0.,10.);
+ TH1F *dmass = new TH1F("dmass","Dimuon-Mass Distribution"
+ ,100,0.,5.);
+
+ TH1F *dmassc = new TH1F("dmassc","Dimuon-Mass Distribution"
+ ,200,0.,10.);
+ TH1F *dmassd = new TH1F("dmassd","Dimuon-Mass Distribution"
+ ,200,0.,10.);
+
+ TH1F *pt = new TH1F("pt","pT-single"
+ ,50,0.,10.);
+ TH1F *hCont[30];
+
//
// Generator Loop
//
-
+
+ Int_t i=0;
AliGenCocktailEntry *Entry, *e1, *e2;
AliGenCocktail* Cocktail = (AliGenCocktail*) gAlice->Generator();
) {
Entry->PrintInfo();
}
-// Pairs of Generators
-
//
// Initialize Combinator
- DimuonCombinator Combinator = DimuonCombinator(PartArray);
- Combinator->SetEtaCut(-4, 4);
- Combinator->SetPtMin(0.5);
-
- Int_t i=0;
+//
+ AliDimuCombinator* Combinator = new AliDimuCombinator();
+ Combinator->SetEtaCut(2.5, 4.);
+ Combinator->SetPtMin(1.0);
+
+ i=0;
+
//
// Single Muon Loop
//
-/*
+ Combinator->ResetRange();
+
+
- for(Muon=Combinator.FirstMuon();
+ for(Muon=Combinator->FirstMuon();
Muon;
- Muon=Combinator.NextMuon()) {
+ Muon=Combinator->NextMuon()) {
//
- Int_t chfirst= Muon->GetFirstChild();
- Int_t chlast = Muon->GetLastChild();
- Int_t parent = Muon->GetParent();
- Float_t ptm = Muon->GetPT();
- Float_t eta = Muon->GetEta();
+ Int_t chfirst = Muon->GetFirstDaughter();
+ Int_t chlast = Muon->GetLastDaughter();
+ Int_t parent = Muon->GetFirstMother();
+ Float_t ptm = Muon->Pt();
+ Float_t eta = Muon->Eta();
- printf("\n Particle %d Parent %d first child %d last child %d",
- i,parent, chfirst, chlast);
- printf("\n Particle pt, eta: %f , %f ",pt,eta);
- i++;
+// printf("\n Particle %d Parent %d first child %d last child %d",
+// i,parent, chfirst, chlast);
+// printf("\n Particle pt, eta: %f , %f ", ptm, eta);
+ i++;
}
-*/
//
// Di-Muon Loop
Float_t pt1,pt2;
- GParticle* Muon1, *Muon2;
-/*
+ TParticle* Muon1;
+ TParticle* Muon2;
+
Combinator->ResetRange();
- for (Combinator->FirstMuonPairSelected(Muon1,Muon2);
- (Muon1 && Muon2);
- Combinator->NextMuonPairSelected(Muon1,Muon2))
- {
- pt1=Muon1->GetPT();
- pt2=Muon2->GetPT();
- Float_t mass=Combinator->Mass(Muon1, Muon2);
- Float_t wgt =Combinator->Weight(Muon1, Muon2);
- pt->Fill(pt1, wgt);
- pt->Fill(pt2, wgt);
- Float_t smeared_mass=mass;
- Combinator->SmearGauss(0.05*mass, smeared_mass);
- dmass->Fill(smeared_mass , wgt);
- }
-*/
+
//
// Dimuon Loop controlled by Generator Loop
//
+ Float_t sig = 0;
+ Int_t icont = 0;
+ char name[30];
for (Cocktail->FirstGeneratorPair(e1,e2);
(e1&&e2);
Cocktail->NextGeneratorPair(e1,e2)
){
+
+ sprintf(name, "%s-%s", e1->GetName(), e2->GetName());
+ hCont[icont] = new TH1F(name,"Dimuon-Mass Distribution",100,0.,5.);
printf("\n ----------------------------------------------------");
e1->PrintInfo();
e2->PrintInfo();
(Muon1 && Muon2);
Combinator->NextMuonPairSelected(Muon1,Muon2))
{
- pt1=Muon1->GetPT();
- pt2=Muon2->GetPT();
- Float_t mass=Combinator->Mass(Muon1, Muon2);
- Float_t wgt =Combinator->Weight(Muon1, Muon2);
+ pt1 = Muon1->Pt();
+ pt2 = Muon2->Pt();
+ Float_t mass = Combinator->Mass(Muon1, Muon2);
+ Float_t wgt = runWeight*Combinator->Weight(Muon1, Muon2)*
+ Combinator->DecayProbability(Muon1)*
+ Combinator->DecayProbability(Muon2);
pt->Fill(pt1, wgt);
pt->Fill(pt2, wgt);
- Float_t smeared_mass=mass;
- Combinator->SmearGauss(0.05*mass, smeared_mass);
- dmass->Fill(smeared_mass , wgt);
+ Float_t smeared_mass = mass;
+ Combinator->SmearGauss(0.02*mass, smeared_mass);
+
+ if (TMath::Min(pt1,pt2) > -0.5*TMath::Max(pt1,pt2)+2.) {
+ if (Combinator->Correlated(Muon1, Muon2)) {
+ dmassc->Fill(smeared_mass, wgt);
+ sig += wgt;
+ } else {
+// account for the fact that we sum like-sign and unlike-sign
+ wgt *= 0.5;
+ }
+ dmass->Fill(smeared_mass, wgt);
+ hCont[icont]->Fill(smeared_mass, wgt);
+ }
} // Dimuon Loop
+ icont++;
}// Generator Loop
-
+ printf("\n Signal %e \n \n", sig);
+
//
//Create a canvas, set the view range, show histograms
//
pt->Draw();
pad12->cd();
+ pad12->SetLogy(0);
dmass->SetFillColor(42);
dmass->SetXTitle("m (GeV)");
dmass->Draw();
+
+ pad13->cd();
+ pad13->SetLogy(0);
+ dmassc->SetFillColor(42);
+ dmassc->SetXTitle("m (GeV)");
+ dmassc->Draw();
+
+ pad14->cd();
+ pad14->SetLogy(0);
+ dmassd->SetFillColor(42);
+ dmassd->SetXTitle("m (GeV)");
+ dmassd->Draw();
+
+
}
+
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff