void readPrimaries(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 // rl->LoadKinematics(); rl->LoadHeader(); for (Int_t nev=0; nev<= evNumber2; nev++) { rl->GetEvent(nev); AliStack* stack = rl->Stack(); Int_t npart = stack->GetNprimary(); if (nev < evNumber1) continue; // // Loop over primary particles (jpsi. upsilon, ...) // for (Int_t part=0; partParticle(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); }