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1 | void TestPrimaries(Int_t evNumber1=0, Int_t evNumber2=0) | |
2 | { | |
3 | // Dynamically link some shared libs | |
4 | if (gClassTable->GetID("AliRun") < 0) { | |
5 | gROOT->LoadMacro("loadlibs.C"); | |
6 | loadlibs(); | |
7 | } | |
8 | // Connect the Root Galice file containing Geometry, Kine and Hits | |
9 | AliRunLoader* rl = AliRunLoader::Open("galice.root"); | |
10 | // | |
11 | TDatabasePDG* DataBase = TDatabasePDG::Instance(); | |
12 | ||
13 | // Create some histograms | |
14 | ||
15 | TH1F *thetaH = new TH1F("thetaH","Theta distribution",180,0,180); | |
16 | TH1F *phiH = new TH1F("phiH","Phi distribution" ,180,-180,180); | |
17 | TH1F *etaH = new TH1F("etaH","Pseudorapidity",120,-12,12); | |
18 | TH1F *yH = new TH1F("yH","Rapidity distribution",120,-12,12); | |
19 | TH1F *eH = new TH1F("eH","Energy distribution",100,0,100); | |
20 | TH1F *eetaH = new TH1F("eetaH","Pseudorapidity",120,0,12); | |
21 | TH1F *ptH = new TH1F("ptH","Pt distribution",150,0,15); | |
22 | // | |
23 | // Loop over events | |
24 | // | |
25 | rl->LoadKinematics(); | |
26 | rl->LoadHeader(); | |
27 | ||
28 | for (Int_t nev=0; nev<= evNumber2; nev++) { | |
29 | rl->GetEvent(nev); | |
30 | AliStack* stack = rl->Stack(); | |
31 | Int_t npart = stack->GetNprimary(); | |
32 | if (nev < evNumber1) continue; | |
33 | // | |
34 | // Loop over primary particles (jpsi. upsilon, ...) | |
35 | // | |
36 | ||
37 | for (Int_t part=0; part<npart; part++) { | |
38 | TParticle *MPart = stack->Particle(part); | |
39 | Int_t mpart = MPart->GetPdgCode(); | |
40 | Int_t child1 = MPart->GetFirstDaughter(); | |
41 | Int_t child2 = MPart->GetLastDaughter(); | |
42 | Int_t mother = MPart->GetFirstMother(); | |
43 | Float_t Pt = MPart->Pt(); | |
44 | Float_t E = MPart->Energy(); | |
45 | Float_t Pz = MPart->Pz(); | |
46 | Float_t Py = MPart->Py(); | |
47 | Float_t Px = MPart->Px(); | |
48 | Float_t pT = TMath::Sqrt(Px*Px+Py*Py); | |
49 | Float_t theta = MPart->Theta(); | |
50 | Float_t phi = MPart->Phi()-TMath::Pi(); | |
51 | Float_t eta = -TMath::Log(TMath::Tan(theta/2.)); | |
52 | Float_t y = 0.5*TMath::Log((E+Pz+1.e-13)/(E-Pz+1.e-13)); | |
53 | ||
54 | if (child1 >= 0) continue; | |
55 | if (DataBase->GetParticle(mpart)->Charge() == 0) continue; | |
56 | Float_t wgt = 1./(Float_t ((evNumber2-evNumber1)+1.)); | |
57 | thetaH->Fill(theta*180./TMath::Pi(),wgt); | |
58 | phiH->Fill(phi*180./TMath::Pi(),wgt); | |
59 | etaH->Fill(eta,5.*wgt); | |
60 | eetaH->Fill(eta,E); | |
61 | yH->Fill(y,5.*wgt); | |
62 | eH->Fill(E,wgt); | |
63 | ptH->Fill(pT,wgt); | |
64 | } // primary loop | |
65 | } | |
66 | ||
67 | //Create a canvas, set the view range, show histograms | |
68 | TCanvas *c1 = new TCanvas("c1","Canvas 1",400,10,600,700); | |
69 | c1->Divide(2,2); | |
70 | c1->cd(1); ptH->Draw(); | |
71 | c1->cd(2); etaH->Draw(); | |
72 | c1->cd(3); yH->Draw(); | |
73 | c1->cd(4); eH->Draw(); | |
74 | ||
75 | TCanvas *c2 = new TCanvas("c2","Canvas 1",400,10,600,700); | |
76 | c2->Divide(2,2); | |
77 | c2->cd(1); phiH->Draw(); | |
78 | c2->cd(2); thetaH->Draw(); | |
79 | c2->cd(3); eetaH->Draw(); | |
80 | ||
81 | TFile* f = new TFile("kineH.root", "update"); | |
82 | ptH->Write(); | |
83 | etaH->Write(); | |
84 | yH->Write(); | |
85 | phiH->Write(); | |
86 | f->Close(); | |
87 | ||
88 | ||
89 | } | |
90 | ||
91 | ||
92 | ||
93 | ||
94 | ||
95 | ||
96 |