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f09fd69e | 1 | //=============================================================== |
2 | // In this Macro (which can (must) be compilated), you will find all the | |
3 | // analysis functions to build photon spectrum, invariant mass | |
4 | // spectrum of photon pairs and combinatorial background calculations | |
5 | // in ALICE electromagnetic calorimeter | |
6 | // Author: Gines MARTINEZ, Subatech, 15 june 2001 | |
7 | //============================================================== | |
8 | #include "TH2.h" | |
9 | #include "TH1.h" | |
10 | #include "TFile.h" | |
079e348c | 11 | #include "TTree.h" |
f09fd69e | 12 | #include "TRandom.h" |
13 | #include "TObjectTable.h" | |
079e348c | 14 | #include "AliRun.h" |
15 | #include "AliPHOSGetter.h" | |
f09fd69e | 16 | #include "AliPHOSRecParticle.h" |
17 | #include "TLorentzVector.h" | |
18 | #include "TGraphErrors.h" | |
19 | #include "TF1.h" | |
20 | ||
21 | TObjectTable * gObjectTable; | |
84ae9571 | 22 | TRandom * gRandom; |
23 | AliRun * gAlice; | |
f09fd69e | 24 | |
25 | ||
26 | void AnaMinv(char * filename) | |
27 | { | |
28 | TH2F * h_Minv_lowpT = new TH2F("h_Minv_lowpT","Minv vs pT low",500,0.0,1.0,40,0.,10.); | |
29 | TH2F * h_Minv_highpT = new TH2F("h_Minv_highpT","Minv vs pT high",500,0.0,1.0,50,0.,100.); | |
30 | TH2F * h_Minv_lowpT_back = new TH2F("h_Minv_lowpT_back","Minv vs pT low back",500,0.0,1.0,40,0.,10.); | |
31 | TH2F * h_Minv_highpT_back = new TH2F("h_Minv_highpT_back","Minv vs pT high back",500,0.0,1.0,50,0.,100.); | |
32 | ||
33 | ||
34 | TH1F * h_Pseudoeta = new TH1F("h_Pseudoeta","Pseudoeta photons",500,-1.0,1.0); | |
35 | TH1F * h_Pt = new TH1F("h_Pt","Pt photons",400,0.,10.); | |
36 | TH2F * h_Peta_Pt = new TH2F("h_Peta_Pt","Pseudo vs pT",40,0.,10.,50,-1.0,1.0); | |
37 | TH1F * h_Phi = new TH1F("h_Phi","Phi photons",400,-4.,4.); | |
38 | TH2F * h_Peta_Phi = new TH2F("h_Peta_Phi","Pseudo vs Phi",200,-4,4,200,-1.0,1.0); | |
84ae9571 | 39 | TH1F * h_Dispersion= new TH1F("h_Dispersion","Dispersion",50,0.,10.); |
40 | TH1F * h_Type = new TH1F("h_Type","Particle Type",10,0.,10.); | |
f09fd69e | 41 | |
84ae9571 | 42 | TH1F * h_DeltaR = new TH1F("h_DeltaR","Delta R",400,0.,2.); |
f09fd69e | 43 | TH1F * h_Asymmetry= new TH1F("h_Asymmetry","Asymmetry",400, -2., 2.); |
44 | ||
079e348c | 45 | AliPHOSGetter * RecData = AliPHOSGetter::GetInstance(filename,"Gines") ; |
f09fd69e | 46 | |
47 | AliPHOSRecParticle * RecParticle1; | |
48 | AliPHOSRecParticle * RecParticle2; | |
f09fd69e | 49 | |
84ae9571 | 50 | Float_t RelativeRCut = 0.00001 ; |
f09fd69e | 51 | Float_t AsymmetryCut = 0.7 ; |
52 | Float_t Asymmetry; | |
84ae9571 | 53 | Float_t Type; |
f09fd69e | 54 | |
55 | Int_t iEvent, iRecParticle1, iRecParticle2; | |
56 | Int_t nRecParticle; | |
57 | Float_t invariant_mass, invariant_mass_mixed; | |
84ae9571 | 58 | |
f09fd69e | 59 | Float_t average_multiplicity = 0.; |
60 | ||
079e348c | 61 | for(iEvent=0; iEvent<gAlice->TreeE()->GetEntries(); iEvent++) |
f09fd69e | 62 | { |
84ae9571 | 63 | TLorentzVector P_photon1, P_photon2, P_photonMixed1, P_photonMixed2 ; |
64 | ||
079e348c | 65 | RecData->Event(iEvent); |
f09fd69e | 66 | printf(">>> Event %d \n",iEvent); |
079e348c | 67 | nRecParticle=RecData->NRecParticles(); |
68 | average_multiplicity += ((Float_t) (nRecParticle) ) / ( (Float_t)gAlice->TreeE()->GetEntries() ) ; | |
f09fd69e | 69 | // Construction de la masse invariante des pairs |
70 | if (nRecParticle > 1) | |
71 | { | |
72 | for(iRecParticle1=0; iRecParticle1<nRecParticle; iRecParticle1++) | |
73 | { | |
079e348c | 74 | RecParticle1 = (AliPHOSRecParticle *) RecData->RecParticle(iRecParticle1); |
f09fd69e | 75 | RecParticle1->Momentum(P_photon1); |
84ae9571 | 76 | Type = RecParticle1->GetType(); |
77 | h_Type->Fill(Type); | |
78 | ||
f09fd69e | 79 | |
80 | h_Pseudoeta->Fill(P_photon1.PseudoRapidity()); | |
81 | h_Pt->Fill(P_photon1.Pt()); | |
82 | h_Phi->Fill(P_photon1.Phi()); | |
83 | h_Peta_Pt->Fill(P_photon1.Pt(), P_photon1.PseudoRapidity()); | |
84 | h_Peta_Phi->Fill(P_photon1.Phi(), P_photon1.PseudoRapidity() ); | |
84ae9571 | 85 | |
f09fd69e | 86 | for(iRecParticle2=iRecParticle1+1; iRecParticle2<nRecParticle; iRecParticle2++) |
87 | { | |
079e348c | 88 | RecParticle2 = (AliPHOSRecParticle *) RecData->RecParticle(iRecParticle2); |
f09fd69e | 89 | RecParticle2->Momentum(P_photon2); |
90 | Asymmetry = TMath::Abs((P_photon1.E()-P_photon2.E())/(P_photon1.E()+P_photon2.E())); | |
91 | if ( (P_photon1 != P_photon2) && | |
92 | (P_photon1.DeltaR(P_photon2) > RelativeRCut) && | |
93 | (Asymmetry < AsymmetryCut) ) | |
94 | { | |
95 | h_DeltaR->Fill(P_photon1.DeltaR(P_photon2)); | |
96 | h_Asymmetry->Fill( Asymmetry ); | |
97 | ||
98 | // printf("A. p1 es %f \n",P_photon1->E()); | |
99 | invariant_mass = (P_photon1 + P_photon2).M(); | |
100 | // printf("B. p1 es %f \n",P_photon1->E()); | |
101 | h_Minv_lowpT->Fill(invariant_mass, (P_photon1 + P_photon2).Pt() ); | |
102 | h_Minv_highpT->Fill(invariant_mass,(P_photon1 + P_photon2).Pt() ); | |
103 | } | |
104 | } | |
105 | } | |
106 | } | |
107 | } | |
108 | printf(">>> Average Multiplicity is %f \n",average_multiplicity); | |
079e348c | 109 | Int_t Background = (Int_t) (gAlice->TreeE()->GetEntries() * average_multiplicity * (average_multiplicity-1.)/2.) ; |
f09fd69e | 110 | printf(">>> Background is %d \n",Background); |
111 | ||
112 | Double_t Pt_Mixed1, Pt_Mixed2; | |
113 | Double_t Y_Mixed1, Y_Mixed2; | |
114 | Double_t Phi_Mixed1, Phi_Mixed2; | |
115 | ||
116 | for(iEvent=0; iEvent<Background; iEvent++) | |
117 | { | |
84ae9571 | 118 | TLorentzVector P_photon1, P_photon2, P_photonMixed1, P_photonMixed2 ; |
f09fd69e | 119 | // printf(">>> Background Event %d \n",iEvent); |
120 | Pt_Mixed1 = h_Pt->GetRandom(); | |
121 | Pt_Mixed2 = h_Pt->GetRandom(); | |
122 | h_Peta_Phi->GetRandom2(Phi_Mixed1, Y_Mixed1); | |
123 | h_Peta_Phi->GetRandom2(Phi_Mixed2, Y_Mixed2); | |
124 | P_photonMixed1.SetPtEtaPhiM( Pt_Mixed1, Y_Mixed1, Phi_Mixed1, 0.0); | |
125 | P_photonMixed2.SetPtEtaPhiM( Pt_Mixed2, Y_Mixed2, Phi_Mixed2, 0.0); | |
126 | Asymmetry = TMath::Abs((P_photonMixed1.E()-P_photonMixed2.E())/(P_photonMixed1.E()+P_photonMixed2.E())); | |
127 | ||
128 | if ( (P_photonMixed1.DeltaR(P_photonMixed2) > RelativeRCut) && | |
129 | (Asymmetry < AsymmetryCut ) ) | |
130 | { | |
131 | invariant_mass_mixed = (P_photonMixed1 + P_photonMixed2).M(); | |
132 | h_Minv_lowpT_back->Fill(invariant_mass_mixed, (P_photonMixed1 + P_photonMixed2).Pt() ); | |
133 | h_Minv_highpT_back->Fill(invariant_mass_mixed,(P_photonMixed1 + P_photonMixed2).Pt() ); | |
134 | } | |
135 | } | |
136 | ||
137 | ||
138 | char outputname[80]; | |
139 | sprintf(outputname,"%s.Minv",filename); | |
140 | TFile output(outputname,"recreate"); | |
141 | h_Minv_lowpT->Write(); | |
142 | h_Minv_highpT->Write(); | |
143 | h_Minv_lowpT_back->Write(); | |
144 | h_Minv_highpT_back->Write(); | |
145 | h_Pseudoeta->Write(); | |
146 | h_Pt->Write(); | |
147 | h_Peta_Pt->Write(); | |
148 | h_Phi->Write(); | |
149 | h_Peta_Phi->Write(); | |
84ae9571 | 150 | h_Dispersion->Write(); |
151 | h_Type->Write(); | |
f09fd69e | 152 | h_Asymmetry->Write(); |
153 | h_DeltaR->Write(); | |
154 | ||
155 | output.Close(); | |
156 | } | |
157 | ||
158 | ||
159 | void AnaPtSpectrum(char * filename, Int_t NumberPerPtBin, Option_t * particle, Option_t * opt) | |
160 | { | |
161 | ||
162 | Int_t NumberOfPtBins = NumberPerPtBin; | |
163 | Float_t PtCalibration = 0.250; | |
164 | ||
165 | TFile * in = new TFile(filename); | |
166 | ||
167 | TH2F * h_Minv_pT = 0; | |
168 | TH2F * h_Minv_pT_back = 0; | |
169 | TH2F * frame = 0 ; | |
170 | ||
171 | if (strstr(opt,"low")) | |
172 | { | |
173 | h_Minv_pT = (TH2F *) in->Get("h_Minv_lowpT"); ; | |
174 | h_Minv_pT_back = (TH2F *) in->Get("h_Minv_lowpT_back"); | |
175 | PtCalibration = 0.250; | |
176 | frame = new TH2F("PtSpectrumlow","Pt Spectrum low",10, 0.,10.,10,0.1,10000); | |
177 | } | |
178 | if (strstr(opt,"high")) | |
179 | { | |
180 | h_Minv_pT = (TH2F *) in->Get("h_Minv_highpT"); ; | |
181 | h_Minv_pT_back = (TH2F *) in->Get("h_Minv_highpT_back"); | |
182 | PtCalibration = 2.5; | |
183 | frame = new TH2F("PtSpectrumhigh","Pt Spectrum high",10, 0.,100.,10,0.1,10000); | |
184 | } | |
185 | ||
186 | if ( h_Minv_pT == 0 ) | |
187 | { | |
188 | printf(">>> Bad Option! \n"); | |
189 | return; | |
190 | } | |
191 | Int_t Norma_1 = 100; Float_t Norma_minv_1 = 0.2; | |
192 | Int_t Norma_2 = 200; Float_t Norma_minv_2 = 0.4; | |
193 | ||
84ae9571 | 194 | Int_t Minv_1 = 46; |
f09fd69e | 195 | Int_t Minv_2 = 76; |
196 | if (strstr(particle,"eta")) | |
197 | { | |
84ae9571 | 198 | Minv_1 = 214; |
f09fd69e | 199 | Minv_2 = 314; |
200 | } | |
201 | ||
202 | if (strstr(particle,"norma")) | |
203 | { | |
204 | Minv_1 = 100; | |
205 | Minv_2 = 200; | |
206 | } | |
207 | ||
208 | Int_t NHistos = 40/NumberOfPtBins; | |
209 | Int_t iHistos; | |
210 | ||
211 | TH1D * signal = 0; | |
212 | TH1D * background = 0; | |
213 | TH1D * ratio = 0; | |
214 | TH1D * difference = 0; | |
215 | ||
216 | Float_t Pt[NHistos]; | |
217 | Float_t PtError[NHistos]; | |
218 | Float_t Nmesons[NHistos]; | |
219 | Float_t NmesonsError[NHistos]; | |
220 | ||
221 | Float_t Ntota, Nback, Norma, NormaError, Renorma; | |
222 | ||
223 | for(iHistos=0; iHistos<NHistos; iHistos++) | |
224 | { | |
225 | signal = h_Minv_pT->ProjectionX("signal", NumberOfPtBins*iHistos+1,NumberOfPtBins*(iHistos+1)); | |
226 | background = h_Minv_pT_back->ProjectionX("background",NumberOfPtBins*iHistos+1,NumberOfPtBins*(iHistos+1)); | |
84ae9571 | 227 | |
f09fd69e | 228 | ratio = new TH1D(*signal); |
229 | ratio->Sumw2(); | |
230 | ratio->Add(background,-1.0); | |
231 | ratio->Divide(background); | |
232 | difference = new TH1D(*signal); | |
233 | difference->Sumw2(); | |
234 | ratio->Fit("pol0","","",Norma_minv_1,Norma_minv_2); | |
235 | if (background->Integral(Norma_1,Norma_2) == 0) | |
236 | Renorma = 0.; | |
237 | else | |
238 | Renorma = signal->Integral(Norma_1,Norma_2)/background->Integral(Norma_1,Norma_2); | |
239 | difference->Add(background,(-1.)*Renorma); | |
84ae9571 | 240 | |
f09fd69e | 241 | |
242 | Ntota = signal->Integral(Minv_1,Minv_2); | |
243 | Nback = background->Integral(Minv_1,Minv_2); | |
244 | Norma = ratio->GetFunction("pol0")->GetParameter(0); | |
245 | if (Renorma == 0.) | |
246 | NormaError = 0.; | |
247 | else | |
248 | NormaError = ratio->GetFunction("pol0")->GetParError(0); | |
249 | printf("Ntotal %f Nback %f Norma %f and NormaError %f \n",Ntota, Nback, Norma, NormaError); | |
250 | printf("differencia is %f \n",difference->Integral(Minv_1,Minv_2)); | |
251 | Nmesons[iHistos] = Ntota - Renorma * Nback; | |
252 | NmesonsError[iHistos] = TMath::Sqrt( Ntota + Nback*Renorma*Renorma + Nback*Nback*NormaError*NormaError ); | |
253 | Pt[iHistos] = (iHistos+0.5)*NumberOfPtBins*PtCalibration; | |
254 | PtError[iHistos] = NumberOfPtBins*PtCalibration/2.; | |
84ae9571 | 255 | |
f09fd69e | 256 | } |
f09fd69e | 257 | |
258 | char filenameout[80]; | |
259 | sprintf(filenameout,"%s.PtSpectrum_%d_%s_%s",filename, NumberPerPtBin, particle, opt); | |
260 | TFile out(filenameout,"recreate"); | |
261 | TGraphErrors * PtSpectrum = new TGraphErrors(NHistos, Pt, Nmesons, PtError, NmesonsError); | |
262 | PtSpectrum->SetName("PtSpectrum"); | |
263 | PtSpectrum->Write(); | |
264 | out.Close(); | |
265 | ||
266 | frame->Draw(); | |
267 | frame->SetStats(0); | |
268 | frame->SetXTitle("Neutral meson pT (GeV/c)"); | |
269 | frame->SetYTitle("Number of neutral mesons per pT bin"); | |
270 | PtSpectrum->SetMarkerStyle(27); | |
271 | PtSpectrum->Draw("P"); | |
272 | ||
84ae9571 | 273 | |
f09fd69e | 274 | } |