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Commit | Line | Data |
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75ec0f41 | 1 | // |
2 | // Script to make correction maps for dndeta measurements using the | |
3 | // dNdEtaCorrection class. | |
4 | // | |
5 | ||
6 | makeCorrection(Char_t* dataDir, Int_t nRuns=20) { | |
7 | ||
8 | Char_t str[256]; | |
9 | ||
745e836a | 10 | gSystem->Load("../libPWG0base.so"); |
75ec0f41 | 11 | |
12 | // ######################################################## | |
13 | // selection of esd tracks | |
745e836a | 14 | AliESDtrackCuts* esdTrackCuts = new AliESDtrackCuts(); |
75ec0f41 | 15 | esdTrackCuts->DefineHistograms(1); |
16 | ||
17 | esdTrackCuts->SetMinNClustersTPC(50); | |
18 | esdTrackCuts->SetMaxChi2PerClusterTPC(3.5); | |
19 | esdTrackCuts->SetMaxCovDiagonalElements(2,2,0.5,0.5,2); | |
20 | esdTrackCuts->SetRequireTPCRefit(kTRUE); | |
21 | ||
22 | esdTrackCuts->SetMinNsigmaToVertex(3); | |
23 | esdTrackCuts->SetAcceptKingDaughters(kFALSE); | |
24 | ||
745e836a | 25 | AliLog::SetClassDebugLevel("AliESDtrackCuts",1); |
75ec0f41 | 26 | |
27 | // ######################################################## | |
28 | // definition of dNdEta correction object | |
29 | ||
30 | dNdEtaCorrection* dNdEtaMap = new dNdEtaCorrection(); | |
31 | ||
32 | // ######################################################## | |
33 | // get the data dir | |
34 | Char_t execDir[256]; | |
35 | sprintf(execDir,gSystem->pwd()); | |
36 | TSystemDirectory* baseDir = new TSystemDirectory(".",dataDir); | |
37 | TList* dirList = baseDir->GetListOfFiles(); | |
38 | Int_t nDirs = dirList->GetEntries(); | |
39 | // go back to the dir where this script is executed | |
40 | gSystem->cd(execDir); | |
41 | ||
42 | // ######################################################## | |
43 | // definition of used pointers | |
44 | TFile* esdFile; | |
45 | TTree* esdTree; | |
46 | TBranch* esdBranch; | |
47 | ||
48 | AliESD* esd =0; | |
49 | ||
50 | // ######################################################## | |
51 | // loop over runs | |
52 | Int_t nRunCounter = 0; | |
53 | for (Int_t r=0; r<nDirs; r++) { | |
54 | ||
55 | TSystemFile* presentDir = (TSystemFile*)dirList->At(r); | |
56 | if (!presentDir || !presentDir->IsDirectory()) | |
57 | continue; | |
58 | // check that the files are there | |
59 | TString currentDataDir; | |
60 | currentDataDir.Form("%s/%s",dataDir, presentDir->GetName()); | |
61 | cout << "Processing directory " << currentDataDir.Data() << endl; | |
62 | if ((!gSystem->Which(currentDataDir,"galice.root")) || | |
63 | (!gSystem->Which(currentDataDir,"AliESDs.root"))) | |
64 | continue; | |
65 | ||
66 | if (nRunCounter++ >= nRuns) | |
67 | break; | |
68 | ||
69 | cout << "run #" << nRunCounter << endl; | |
70 | ||
71 | // ######################################################### | |
72 | // setup galice and runloader | |
73 | if (gAlice) { | |
74 | delete gAlice->GetRunLoader(); | |
75 | delete gAlice; | |
76 | gAlice=0; | |
77 | } | |
78 | ||
79 | sprintf(str,"%s/galice.root",currentDataDir.Data()); | |
80 | AliRunLoader* runLoader = AliRunLoader::Open(str); | |
81 | ||
82 | runLoader->LoadgAlice(); | |
83 | gAlice = runLoader->GetAliRun(); | |
84 | runLoader->LoadKinematics(); | |
85 | runLoader->LoadHeader(); | |
86 | ||
87 | // ######################################################### | |
88 | // open esd file and get the tree | |
89 | ||
90 | sprintf(str,"%s/AliESDs.root",currentDataDir.Data()); | |
91 | // close it first to avoid memory leak | |
92 | if (esdFile) | |
93 | if (esdFile->IsOpen()) | |
94 | esdFile->Close(); | |
95 | ||
96 | esdFile = TFile::Open(str); | |
97 | esdTree = (TTree*)esdFile->Get("esdTree"); | |
98 | if (!esdTree) | |
99 | continue; | |
100 | esdBranch = esdTree->GetBranch("ESD"); | |
101 | esdBranch->SetAddress(&esd); | |
102 | if (!esdBranch) | |
103 | continue; | |
104 | ||
105 | // ######################################################## | |
106 | // Magnetic field | |
107 | AliTracker::SetFieldMap(gAlice->Field(),kTRUE); // kTRUE means uniform magnetic field | |
108 | //AliKalmanTrack::SetConvConst(1000/0.299792458/5.); | |
109 | ||
110 | // ######################################################## | |
111 | // getting number of events | |
112 | Int_t nEvents = (Int_t)runLoader->GetNumberOfEvents(); | |
113 | Int_t nESDEvents = esdBranch->GetEntries(); | |
114 | ||
115 | if (nEvents!=nESDEvents) { | |
116 | cout << " Different number of events from runloader and esdtree!!!" << nEvents << " / " << nESDEvents << endl; | |
117 | return; | |
118 | } | |
119 | // ######################################################## | |
120 | // loop over number of events | |
121 | cout << " looping over events..." << endl; | |
122 | for(Int_t i=0; i<nEvents; i++) { | |
123 | ||
124 | esdBranch->GetEntry(i); | |
125 | runLoader->GetEvent(i); | |
126 | ||
127 | // ######################################################## | |
128 | // get the EDS vertex | |
129 | AliESDVertex* vtxESD = esd->GetVertex(); | |
130 | ||
131 | Double_t vtx[3]; | |
132 | Double_t vtx_res[3]; | |
133 | vtxESD->GetXYZ(vtx); | |
134 | ||
135 | vtx_res[0] = vtxESD->GetXRes(); | |
136 | vtx_res[1] = vtxESD->GetYRes(); | |
137 | vtx_res[2] = vtxESD->GetZRes(); | |
138 | ||
745e836a | 139 | Bool_t goodEvent = kTRUE; |
140 | ||
75ec0f41 | 141 | // the vertex should be reconstructed |
142 | if (strcmp(vtxESD->GetName(),"default")==0) | |
745e836a | 143 | goodEvent = kFALSE; |
75ec0f41 | 144 | |
145 | // the resolution should be reasonable??? | |
745e836a | 146 | if (vtx_res[2]==0 || vtx_res[2]>0.01) |
147 | goodEvent = kFALSE; | |
75ec0f41 | 148 | |
149 | // ######################################################## | |
150 | // get the MC vertex | |
151 | AliGenPythiaEventHeader* genHeader = | |
152 | (AliGenPythiaEventHeader*)runLoader->GetHeader()->GenEventHeader(); | |
153 | ||
154 | TArrayF vtxMC(3); | |
155 | genHeader->PrimaryVertex(vtxMC); | |
156 | Double_t vtx[3]; | |
157 | vtx[0] = vtxMC[0]; | |
158 | vtx[1] = vtxMC[1]; | |
159 | vtx[2] = vtxMC[2]; | |
160 | ||
75ec0f41 | 161 | // ######################################################## |
162 | // loop over mc particles | |
163 | AliStack* particleStack = runLoader->Stack(); | |
164 | Int_t nPrim = particleStack->GetNprimary(); | |
165 | ||
166 | for (Int_t i_mc=0; i_mc<nPrim; i_mc++) { | |
167 | ||
168 | TParticle* part = particleStack->Particle(i_mc); | |
169 | if (!part || strcmp(part->GetName(),"XXX")==0) | |
170 | continue; | |
171 | ||
172 | TParticlePDG* pdgPart = part->GetPDG(); | |
173 | ||
174 | Bool_t prim = kFALSE; | |
175 | // check if it's a primary particle - is there a better way ??? | |
176 | if ((part->GetFirstDaughter() >= nPrim) || (part->GetFirstDaughter()==-1)) { | |
177 | if (TMath::Abs(pdgPart->PdgCode())>10 && pdgPart->PdgCode()!=21 && strcmp(pdgPart->ParticleClass(),"Unknown")!=0) | |
178 | prim = kTRUE; | |
179 | } | |
180 | if (!prim) | |
181 | continue; | |
182 | ||
183 | if (pdgPart->Charge()==0) | |
184 | continue; | |
185 | ||
186 | Float_t eta = part->Eta(); | |
187 | ||
745e836a | 188 | if (prim) { |
189 | dNdEtaMap->FillParticleAllEvents(vtx[2], eta); | |
190 | ||
191 | if (goodEvent) | |
192 | dNdEtaMap->FillParticleWhenGoodEvent(vtx[2], eta); | |
193 | } | |
75ec0f41 | 194 | |
195 | }// end of mc particle | |
196 | ||
745e836a | 197 | if (!goodEvent) |
198 | continue; | |
199 | ||
75ec0f41 | 200 | // ######################################################## |
201 | // loop over esd tracks | |
202 | Int_t nTracks = esd->GetNumberOfTracks(); | |
203 | for (Int_t t=0; t<nTracks; t++) { | |
204 | AliESDtrack* esdTrack = esd->GetTrack(t); | |
205 | ||
206 | // cut the esd track? | |
207 | if (!esdTrackCuts->AcceptTrack(esdTrack)) | |
208 | continue; | |
209 | ||
210 | AliTPCtrack* tpcTrack = new AliTPCtrack(*esdTrack); | |
211 | if (tpcTrack->GetAlpha()==0) { | |
212 | cout << " Warning esd track alpha = 0" << endl; | |
213 | continue; | |
214 | } | |
215 | ||
216 | Float_t theta = tpcTrack->Theta(); | |
217 | Float_t eta = -TMath::Log(TMath::Tan(theta/2.)); | |
218 | ||
219 | // using the eta of the mc particle | |
220 | Int_t label = TMath::Abs(esdTrack->GetLabel()); | |
221 | if (label<0) { | |
222 | cout << " cannot find corresponding mc part !!! " << label << endl; | |
223 | continue; | |
224 | } | |
225 | TParticle* mcPart = particleStack->Particle(label); | |
226 | eta = mcPart->Eta(); | |
227 | ||
745e836a | 228 | dNdEtaMap->FillParticleWhenMeasuredTrack(vtx[2], eta); |
75ec0f41 | 229 | |
230 | } // end of track loop | |
231 | } // end of event loop | |
232 | } // end of run loop | |
233 | ||
234 | dNdEtaMap->Finish(); | |
235 | ||
236 | TFile* fout = new TFile("correction_map.root","RECREATE"); | |
237 | ||
238 | esdTrackCuts->SaveHistograms("esd_track_cuts"); | |
239 | dNdEtaMap->SaveHistograms(); | |
240 | ||
241 | fout->Write(); | |
242 | fout->Close(); | |
243 | ||
244 | dNdEtaMap->DrawHistograms(); | |
245 | ||
246 | } |