1 Bool_t SelectThis(AliMUONHit* mHit);
3 Bool_t SelectThis(Float_t x, Float_t y, Float_t d)
5 // Float_t x = mHit->X(); // x-pos
6 // Float_t y = mHit->Y(); // y-pos
7 if (TMath::Abs(x) > d/2. && TMath::Abs(y) > d/2.) {
14 Bool_t SelectThat(Float_t x, Float_t y, Float_t d)
16 const Float_t phi0=60.*TMath::Pi()/180.;
21 Float_t phi = TMath::ATan2(y,x);
22 Float_t dist = TMath::Sin(phi0-phi)*TMath::Sqrt(x*x+y*y);
23 if (TMath::Abs(dist) > d) {
30 void MUONacc (Float_t d=3., Int_t evNumber1=0, Int_t evNumber2=0)
32 // Dynamically link some shared libs
33 Float_t rmin[14] = {17.5, 17.5, 23.5, 23.5, 33.5, 33.5, 43., 43., 50., 50,
34 56.1, 56.1, 59.6, 59.6};
35 Float_t rmax[14] = {91.5, 91.5, 122.5, 122.5, 158.3, 158.3, 260.0,
36 260.0, 260.0, 260.0, 293., 293, 293., 293.};
39 if (gClassTable->GetID("AliRun") < 0) {
40 gROOT->LoadMacro("loadlibs.C");
43 // Connect the Root Galice file containing Geometry, Kine and Hits
45 TFile *file = (TFile*)gROOT->GetListOfFiles()->FindObject("galice.root");
49 printf("\n Creating galice.root \n");
50 file = new TFile("galice.root");
52 printf("\n galice.root found in file list");
56 TDatabasePDG* DataBase = new TDatabasePDG();
58 // Get AliRun object from file or create it if not on file
60 gAlice = (AliRun*)(file->Get("gAlice"));
61 if (gAlice) printf("AliRun object found on file\n");
63 printf("\n create new gAlice object");
64 gAlice = new AliRun("gAlice","Alice test program");
68 // Create some histograms
70 TH1F *theta = new TH1F("theta","Theta distribution",180,0,180);
71 TH1F *emult = new TH1F("emult","Event Multiplicity",100,0,1000);
72 TH2F *supp = new TH2F("supp", "Diselected",100, -200., 200, 100, -200., 200.);
74 AliMUONChamber* iChamber;
81 for (Int_t nev=0; nev<= evNumber2; nev++) {
82 Int_t nparticles = gAlice->GetEvent(nev);
83 if (nev < evNumber1) continue;
84 if (nparticles <= 0) return;
86 AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON");
89 TTree *TH = gAlice->TreeH();
90 Int_t ntracks = TH->GetEntries();
91 TClonesArray *fPartArray = gAlice->Particles();
92 Int_t npart = fPartArray->GetEntriesFast();
97 // Loop over primary particles (jpsi. upsilon, ...)
101 for (Int_t part=0; part<30000; part+=3) {
102 TParticle *MPart = gAlice->Particle(part);
103 Int_t mpart = MPart->GetPdgCode();
104 Int_t child1 = MPart->GetFirstDaughter();
105 Int_t child2 = MPart->GetLastDaughter();
106 Int_t mother = MPart->GetFirstMother();
113 // printf("\n PDG Code %d %d %d %d %d %d %d %d \n",
114 // part, mpart, child1, child2, mother,prim, muon1,muon2);
117 Bool_t selected[2]={1,1};
119 for (Int_t track=muon1; track<=muon2;track++) {
121 Int_t nbytes += TH->GetEvent(track);
127 for(AliMUONHit* mHit=(AliMUONHit*)MUON->FirstHit(-1);
129 mHit=(AliMUONHit*)MUON->NextHit())
131 Int_t nch = mHit->Chamber(); // chamber number
132 Float_t x = mHit->X(); // x-pos of hit
133 Float_t y = mHit->Y(); // y-pos
134 Float_t z = mHit->Z(); // z-pos
135 Float_t Eloss = mHit->Eloss(); // energy loss
136 Float_t Theta = mHit->Theta(); // theta
137 Float_t Particle = mHit->Particle(); // Particle type
138 Int_t itrack = Int_t(mHit->Track());
140 TParticle *thePart = gAlice->Particle(itrack);
141 Float_t pTheta=thePart->Theta();
143 if (Particle != kMuonPlus && Particle != kMuonMinus) continue;
145 Float_t P = mhit->Momentum();
146 Float_t R = TMath::Sqrt(x*x+y*y);
147 TParticlePDG* Part = DataBase->GetParticle(Particle);
148 Double_t mass = Part->Mass();
149 theta->Fill(pTheta*180./TMath::Pi(),1.);
151 if (nch>14) continue;
152 // printf("\n %f %f %f %d\n ", R, rmin[nch-1], rmax[nch-1], nch);
153 // Geometrical acceptance of frames
154 // selected[muons] = selected[muons]&&SelectThis(x,y,d);
155 // Cut on default rmin and rmax
156 // selected[muons] = selected[muons] &&( R > rmin[nch-1] && R < rmax[nch-1]);
158 // selected[muons] = selected[muons] &&( R > rmin[nch-1]);
160 // selected[muons] = selected[muons] &&( R < rmax[nch-1]);
161 // selected[muons] = selected[muons] &&( R > z*TMath::Tan(2.0*TMath::Pi()/180.));
162 // Bool_t ok = (z<970 && ( R > z*TMath::Tan(2.0*TMath::Pi()/180.))) ||
163 // (z>970 && ( R > 970 * TMath::Tan(2.0*TMath::Pi()/180.)
164 // +(z-970)* TMath::Tan(1.6*TMath::Pi()/180.)));
166 // Bool_t ok = (z<970 && ( R < z*TMath::Tan(9.0*TMath::Pi()/180.))) ||
167 // (z>970 && ( R < 970 * TMath::Tan(9.0*TMath::Pi()/180.)
168 // +(z-970)* TMath::Tan(12.0*TMath::Pi()/180.)));
169 if (nch == 4 || nch == 7) {
170 Bool_t ok = SelectThat(x,y,d);
176 selected[muons] = selected[muons] && ok;
187 if (selected[0] && selected[1]) Nsel++;
190 printf("\n Selected %d %d \n", Nsel, prim);
193 //Create a canvas, set the view range, show histograms
195 TCanvas *c1 = new TCanvas("c1","Canvas 1",400,10,600,700);