--- /dev/null
+void TestPrimaries(Int_t evNumber1=0, Int_t evNumber2=0)
+{
+// Dynamically link some shared libs
+ if (gClassTable->GetID("AliRun") < 0) {
+ gROOT->LoadMacro("loadlibs.C");
+ loadlibs();
+ }
+// Connect the Root Galice file containing Geometry, Kine and Hits
+
+ AliRunLoader* rl = AliRunLoader::Open("galice.root");
+//
+ TDatabasePDG* DataBase = new TDatabasePDG();
+
+// Create some histograms
+
+ TH1F *thetaH = new TH1F("thetaH","Theta distribution",180,0,180);
+ TH1F *phiH = new TH1F("phiH","Phi distribution" ,180,-180,180);
+ TH1F *etaH = new TH1F("etaH","Pseudorapidity",120,-12,12);
+ TH1F *yH = new TH1F("yH","Rapidity distribution",120,-12,12);
+ TH1F *eH = new TH1F("eH","Energy distribution",100,0,100);
+ TH1F *eetaH = new TH1F("eetaH","Pseudorapidity",120,0,12);
+ TH1F *ptH = new TH1F("ptH","Pt distribution",150,0,15);
+//
+// Loop over events
+//
+
+ for (Int_t nev=0; nev<= evNumber2; nev++) {
+ rl->GetEvent(nev);
+ rl->LoadKinematics();
+ rl->LoadHeader();
+ AliStack* stack = rl->Stack();
+ Int_t npart = stack->GetNprimary();
+ if (nev < evNumber1) continue;
+//
+// Loop over primary particles (jpsi. upsilon, ...)
+//
+
+ for (Int_t part=0; part<npart; part++) {
+ TParticle *MPart = stack->Particle(part);
+ Int_t mpart = MPart->GetPdgCode();
+ Int_t child1 = MPart->GetFirstDaughter();
+ Int_t child2 = MPart->GetLastDaughter();
+ Int_t mother = MPart->GetFirstMother();
+ printf("\n %d %d %d %d ", mpart, child1, child2, mother);
+
+ Float_t Pt = MPart->Pt();
+ Float_t E = MPart->Energy();
+ Float_t Pz = MPart->Pz();
+ Float_t Py = MPart->Py();
+ Float_t Px = MPart->Px();
+ Float_t pT = TMath::Sqrt(Px*Px+Py*Py);
+ Float_t theta = MPart->Theta();
+ Float_t phi = MPart->Phi()-TMath::Pi();
+ Float_t eta = -TMath::Log(TMath::Tan(theta/2.));
+ Float_t y = 0.5*TMath::Log((E+Pz+1.e-13)/(E-Pz+1.e-13));
+
+ if (child1 >= 0) continue;
+ if (mpart == kPi0 || mpart == kGamma) continue;
+ Float_t wgt = 1./(Float_t ((evNumber2-evNumber1)+1.));
+ thetaH->Fill(theta*180./TMath::Pi(),wgt);
+ phiH->Fill(phi*180./TMath::Pi(),wgt);
+ etaH->Fill(eta,5.*wgt);
+ eetaH->Fill(eta,E);
+ yH->Fill(y,5.*wgt);
+ eH->Fill(E,wgt);
+ ptH->Fill(pT,wgt);
+ } // primary loop
+ }
+
+//Create a canvas, set the view range, show histograms
+ TCanvas *c1 = new TCanvas("c1","Canvas 1",400,10,600,700);
+ c1->Divide(2,2);
+ c1->cd(1); ptH->Draw();
+ c1->cd(2); etaH->Draw();
+ c1->cd(3); yH->Draw();
+ c1->cd(4
+
+
+
+); eH->Draw();
+
+ TCanvas *c2 = new TCanvas("c2","Canvas 1",400,10,600,700);
+ c2->Divide(2,2);
+ c2->cd(1); phiH->Draw();
+ c2->cd(2); thetaH->Draw();
+ c2->cd(3); eetaH->Draw();
+ Float_t i0,i1,i2,i3,i4,i5;
+ Float_t ne = Float_t ((evNumber2-evNumber1)+1.);
+
+ i0=eetaH->Integral(01,25)/1000./ne;
+ i1=eetaH->Integral(25,40)/1000./ne;
+ i2=eetaH->Integral(40,50)/1000./ne;
+ i3=eetaH->Integral(50,60)/1000./ne;
+ i4=eetaH->Integral(60,70)/1000./ne;
+ i5=eetaH->Integral(70,120)/1000./ne;
+
+ printf(" 0 < eta < 2.5 %f \n",i0);
+ printf("2.5 < eta < 4.0 %f \n",i1);
+ printf("4.0 < eta < 5.0 %f \n",i2);
+ printf("5.0 < eta < 6.0 %f \n",i3);
+ printf("6.0 < eta < 7.0 %f \n",i4);
+ printf("7.0 < eta <12.0 %f \n",i5);
+
+}
+
+
+
+
+
+
+