2 // Script to make correction maps for dndeta measurements using the
3 // dNdEtaCorrection class.
6 makeCorrection(Char_t* dataDir, Int_t nRuns=20) {
10 gSystem->Load("../esdTrackCuts/libESDtrackQuality.so");
11 gSystem->Load("libdNdEta.so");
13 // ########################################################
14 // selection of esd tracks
15 ESDtrackQualityCuts* esdTrackCuts = new ESDtrackQualityCuts();
16 esdTrackCuts->DefineHistograms(1);
18 esdTrackCuts->SetMinNClustersTPC(50);
19 esdTrackCuts->SetMaxChi2PerClusterTPC(3.5);
20 esdTrackCuts->SetMaxCovDiagonalElements(2,2,0.5,0.5,2);
21 esdTrackCuts->SetRequireTPCRefit(kTRUE);
23 esdTrackCuts->SetMinNsigmaToVertex(3);
24 esdTrackCuts->SetAcceptKingDaughters(kFALSE);
26 AliLog::SetClassDebugLevel("ESDtrackQualityCuts",1);
28 // ########################################################
29 // definition of dNdEta correction object
31 dNdEtaCorrection* dNdEtaMap = new dNdEtaCorrection();
33 // ########################################################
36 sprintf(execDir,gSystem->pwd());
37 TSystemDirectory* baseDir = new TSystemDirectory(".",dataDir);
38 TList* dirList = baseDir->GetListOfFiles();
39 Int_t nDirs = dirList->GetEntries();
40 // go back to the dir where this script is executed
43 // ########################################################
44 // definition of used pointers
51 // ########################################################
53 Int_t nRunCounter = 0;
54 for (Int_t r=0; r<nDirs; r++) {
56 TSystemFile* presentDir = (TSystemFile*)dirList->At(r);
57 if (!presentDir || !presentDir->IsDirectory())
59 // check that the files are there
60 TString currentDataDir;
61 currentDataDir.Form("%s/%s",dataDir, presentDir->GetName());
62 cout << "Processing directory " << currentDataDir.Data() << endl;
63 if ((!gSystem->Which(currentDataDir,"galice.root")) ||
64 (!gSystem->Which(currentDataDir,"AliESDs.root")))
67 if (nRunCounter++ >= nRuns)
70 cout << "run #" << nRunCounter << endl;
72 // #########################################################
73 // setup galice and runloader
75 delete gAlice->GetRunLoader();
80 sprintf(str,"%s/galice.root",currentDataDir.Data());
81 AliRunLoader* runLoader = AliRunLoader::Open(str);
83 runLoader->LoadgAlice();
84 gAlice = runLoader->GetAliRun();
85 runLoader->LoadKinematics();
86 runLoader->LoadHeader();
88 // #########################################################
89 // open esd file and get the tree
91 sprintf(str,"%s/AliESDs.root",currentDataDir.Data());
92 // close it first to avoid memory leak
94 if (esdFile->IsOpen())
97 esdFile = TFile::Open(str);
98 esdTree = (TTree*)esdFile->Get("esdTree");
101 esdBranch = esdTree->GetBranch("ESD");
102 esdBranch->SetAddress(&esd);
106 // ########################################################
108 AliTracker::SetFieldMap(gAlice->Field(),kTRUE); // kTRUE means uniform magnetic field
109 //AliKalmanTrack::SetConvConst(1000/0.299792458/5.);
111 // ########################################################
112 // getting number of events
113 Int_t nEvents = (Int_t)runLoader->GetNumberOfEvents();
114 Int_t nESDEvents = esdBranch->GetEntries();
116 if (nEvents!=nESDEvents) {
117 cout << " Different number of events from runloader and esdtree!!!" << nEvents << " / " << nESDEvents << endl;
120 // ########################################################
121 // loop over number of events
122 cout << " looping over events..." << endl;
123 for(Int_t i=0; i<nEvents; i++) {
125 esdBranch->GetEntry(i);
126 runLoader->GetEvent(i);
128 // ########################################################
129 // get the EDS vertex
130 AliESDVertex* vtxESD = esd->GetVertex();
136 vtx_res[0] = vtxESD->GetXRes();
137 vtx_res[1] = vtxESD->GetYRes();
138 vtx_res[2] = vtxESD->GetZRes();
140 // the vertex should be reconstructed
141 if (strcmp(vtxESD->GetName(),"default")==0)
144 // the resolution should be reasonable???
145 if (vtx_res[2]==0 || vtx_res[2]>0.1)
149 // ########################################################
151 AliGenPythiaEventHeader* genHeader =
152 (AliGenPythiaEventHeader*)runLoader->GetHeader()->GenEventHeader();
155 genHeader->PrimaryVertex(vtxMC);
162 // ########################################################
163 // loop over mc particles
164 AliStack* particleStack = runLoader->Stack();
165 Int_t nPrim = particleStack->GetNprimary();
167 for (Int_t i_mc=0; i_mc<nPrim; i_mc++) {
169 TParticle* part = particleStack->Particle(i_mc);
170 if (!part || strcmp(part->GetName(),"XXX")==0)
173 TParticlePDG* pdgPart = part->GetPDG();
175 Bool_t prim = kFALSE;
176 // check if it's a primary particle - is there a better way ???
177 if ((part->GetFirstDaughter() >= nPrim) || (part->GetFirstDaughter()==-1)) {
178 if (TMath::Abs(pdgPart->PdgCode())>10 && pdgPart->PdgCode()!=21 && strcmp(pdgPart->ParticleClass(),"Unknown")!=0)
184 if (pdgPart->Charge()==0)
187 Float_t eta = part->Eta();
190 dNdEtaMap->FillGene(vtx[2], eta);
192 }// end of mc particle
194 // ########################################################
195 // loop over esd tracks
196 Int_t nTracks = esd->GetNumberOfTracks();
197 for (Int_t t=0; t<nTracks; t++) {
198 AliESDtrack* esdTrack = esd->GetTrack(t);
200 // cut the esd track?
201 if (!esdTrackCuts->AcceptTrack(esdTrack))
204 AliTPCtrack* tpcTrack = new AliTPCtrack(*esdTrack);
205 if (tpcTrack->GetAlpha()==0) {
206 cout << " Warning esd track alpha = 0" << endl;
210 Float_t theta = tpcTrack->Theta();
211 Float_t eta = -TMath::Log(TMath::Tan(theta/2.));
213 // using the eta of the mc particle
214 Int_t label = TMath::Abs(esdTrack->GetLabel());
216 cout << " cannot find corresponding mc part !!! " << label << endl;
219 TParticle* mcPart = particleStack->Particle(label);
222 dNdEtaMap->FillMeas(vtx[2], eta);
224 } // end of track loop
225 } // end of event loop
230 TFile* fout = new TFile("correction_map.root","RECREATE");
232 esdTrackCuts->SaveHistograms("esd_track_cuts");
233 dNdEtaMap->SaveHistograms();
238 dNdEtaMap->DrawHistograms();