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ca28c5f5 | 1 | /**************************************************************************** |
2 | * Very important, delicate and rather obscure macro. * | |
3 | * * | |
4 | * Creates list of "findable" V0s, * | |
5 | * calculates efficiency, resolutions etc. * | |
6 | * * | |
7 | * Origin: I.Belikov, IReS, Strasbourg, Jouri.Belikov@cern.ch * | |
8 | ****************************************************************************/ | |
9 | ||
566abf75 | 10 | #if !defined(__CINT__) || defined(__MAKECINT__) |
4fa1e629 | 11 | #include <TMath.h> |
12 | #include <TError.h> | |
13 | #include <Riostream.h> | |
14 | #include <TH1F.h> | |
15 | #include <TTree.h> | |
16 | #include <TParticle.h> | |
17 | #include <TCanvas.h> | |
18 | #include <TLine.h> | |
19 | #include <TText.h> | |
20 | #include <TBenchmark.h> | |
21 | #include <TStyle.h> | |
8b462fd8 | 22 | #include <TFile.h> |
4fa1e629 | 23 | #include <TROOT.h> |
24 | ||
25 | #include "AliStack.h" | |
566abf75 | 26 | #include "AliHeader.h" |
4fa1e629 | 27 | #include "AliTrackReference.h" |
566abf75 | 28 | #include "AliRunLoader.h" |
ca28c5f5 | 29 | #include "AliRun.h" |
86ad5fcb | 30 | #include "AliESDEvent.h" |
ca28c5f5 | 31 | #endif |
32 | ||
4fa1e629 | 33 | Int_t GoodV0s(const Char_t *dir="."); |
ca28c5f5 | 34 | |
566abf75 | 35 | extern AliRun *gAlice; |
4fa1e629 | 36 | extern TBenchmark *gBenchmark; |
37 | extern TROOT *gROOT; | |
566abf75 | 38 | |
4fa1e629 | 39 | static Int_t allgood=0; |
40 | static Int_t allfound=0; | |
5102bab6 | 41 | |
4fa1e629 | 42 | Int_t AliV0Comparison(Int_t code=310, const Char_t *dir=".") { |
43 | //Lambda=3122, LambdaBar=-3122 | |
44 | gBenchmark->Start("AliV0Comparison"); | |
45 | ||
46 | ::Info("AliV0Comparison.C","Doing comparison..."); | |
5102bab6 | 47 | |
48 | ||
04b2a5f1 | 49 | const Double_t V0window=0.05; |
50 | Double_t ptncut=0.13, ptpcut=0.13, kinecut=0.03; | |
51 | Double_t V0mass=0.497672, V0width=0.020; | |
ca28c5f5 | 52 | switch (code) { |
04b2a5f1 | 53 | case kK0Short: |
54 | break; | |
55 | case kLambda0: | |
56 | V0mass=1.115683; V0width=0.015; ptpcut=0.50; kinecut=0.002; | |
57 | break; | |
58 | case kLambda0Bar: | |
59 | V0mass=1.115683; V0width=0.015; ptncut=0.50; kinecut=0.002; | |
60 | break; | |
ca28c5f5 | 61 | default: cerr<<"Invalid PDG code !\n"; return 1; |
62 | } | |
63 | ||
4fa1e629 | 64 | TH1F *hp=(TH1F*)gROOT->FindObject("hp"); |
65 | if (!hp) hp=new TH1F("hp","PHI Resolution",30,-30.,30.); | |
566abf75 | 66 | hp->SetXTitle("(mrad)"); hp->SetFillColor(2); |
4fa1e629 | 67 | |
68 | TH1F *hl=(TH1F*)gROOT->FindObject("hl"); | |
69 | if (!hl) hl=new TH1F("hl","LAMBDA Resolution",30,-30,30); | |
70 | hl->SetXTitle("(mrad)"); hl->SetFillColor(1); hl->SetFillStyle(3013); | |
71 | ||
72 | TH1F *hpt=(TH1F*)gROOT->FindObject("hpt"); | |
73 | if (!hpt) hpt=new TH1F("hpt","Relative Pt Resolution",30,-10.,10.); | |
566abf75 | 74 | hpt->SetXTitle("(%)"); hpt->SetFillColor(2); |
75 | ||
4fa1e629 | 76 | TH1F *hx=(TH1F*)gROOT->FindObject("hx"); |
77 | if (!hx) hx=new TH1F("hx","Position Resolution (X)",30,-3.,3.); | |
566abf75 | 78 | hx->SetXTitle("(mm)"); hx->SetFillColor(6); |
4fa1e629 | 79 | |
80 | TH1F *hy=(TH1F*)gROOT->FindObject("hy"); | |
81 | if (!hy) hy=new TH1F("hy","Position Resolution (Y)",30,-3.,3.); | |
566abf75 | 82 | hy->SetXTitle("(mm)"); hy->SetFillColor(1); hy->SetFillStyle(3013); |
4fa1e629 | 83 | |
84 | TH1F *hz=(TH1F*)gROOT->FindObject("hz"); | |
85 | if (!hz) hz=new TH1F("hz","Position Resolution (Z)",30,-3.,3.); | |
566abf75 | 86 | hz->SetXTitle("(mm)"); hz->SetFillColor(6); |
87 | ||
88 | ||
89 | Double_t pmin=0.2, pmax=4.2; Int_t nchan=20; | |
4fa1e629 | 90 | TH1F *hgood=(TH1F*)gROOT->FindObject("hgood"); |
91 | if (!hgood) hgood=new TH1F("hgood","Good Vertices",nchan,pmin,pmax); | |
92 | ||
93 | TH1F *hfound=(TH1F*)gROOT->FindObject("hfound"); | |
94 | if (!hfound) hfound=new TH1F("hfound","Found Vertices",nchan,pmin,pmax); | |
95 | ||
96 | TH1F *hfake=(TH1F*)gROOT->FindObject("hfake"); | |
97 | if (!hfake) hfake=new TH1F("hfake","Fake Vertices",nchan,pmin,pmax); | |
98 | ||
99 | TH1F *hg=(TH1F*)gROOT->FindObject("hg"); | |
100 | if (!hg) hg=new TH1F("hg","Efficiency for Good Vertices",nchan,pmin,pmax); | |
566abf75 | 101 | hg->SetLineColor(4); hg->SetLineWidth(2); |
4fa1e629 | 102 | |
103 | TH1F *hf=(TH1F*)gROOT->FindObject("hf"); | |
104 | if (!hf) hf=new TH1F("hf","Probability of Fake Vertices",nchan,pmin,pmax); | |
566abf75 | 105 | hf->SetFillColor(1); hf->SetFillStyle(3013); hf->SetLineWidth(2); |
106 | ||
4fa1e629 | 107 | |
566abf75 | 108 | Double_t mmin=V0mass-V0window, mmax=V0mass+V0window; |
4fa1e629 | 109 | TH1F *v0s=(TH1F*)gROOT->FindObject("v0s"); |
110 | if (!v0s) v0s=new TH1F("v0s","V0s Effective Mass",40, mmin, mmax); | |
111 | v0s->SetXTitle("(GeV)"); v0s->SetLineColor(4); v0s->SetLineWidth(4); | |
112 | ||
113 | TH1F *v0sf=(TH1F*)gROOT->FindObject("v0sf"); | |
114 | if (!v0sf) v0sf=new TH1F("v0sf","Fake V0s Effective Mass",40, mmin, mmax); | |
566abf75 | 115 | v0sf->SetXTitle("(GeV)"); v0sf->SetFillColor(6); |
116 | ||
117 | ||
4fa1e629 | 118 | Char_t fname[100]; |
119 | sprintf(fname,"%s/GoodV0s.root",dir); | |
120 | ||
121 | TFile *refFile=TFile::Open(fname,"old"); | |
122 | if (!refFile || !refFile->IsOpen()) { | |
123 | ::Info("AliV0Comparison.C","Marking good V0s (will take a while)..."); | |
124 | if (GoodV0s(dir)) { | |
125 | ::Error("AliV0Comparison.C","Can't generate the reference file !"); | |
126 | return 1; | |
127 | } | |
128 | } | |
129 | refFile=TFile::Open(fname,"old"); | |
130 | if (!refFile || !refFile->IsOpen()) { | |
131 | ::Error("AliV0Comparison.C","Can't open the reference file !"); | |
132 | return 1; | |
133 | } | |
134 | ||
135 | TTree *v0Tree=(TTree*)refFile->Get("v0Tree"); | |
136 | if (!v0Tree) { | |
137 | ::Error("AliV0Comparison.C","Can't get the reference tree !"); | |
138 | return 2; | |
139 | } | |
140 | TBranch *pbranch=v0Tree->GetBranch("positive"); | |
141 | if (!pbranch) { | |
142 | ::Error("AliV0Comparison.C","Can't get the positive daughter branch !"); | |
143 | return 3; | |
144 | } | |
145 | TClonesArray dummy("AliTrackReference",1000), *prefs=&dummy; | |
146 | pbranch->SetAddress(&prefs); | |
ca28c5f5 | 147 | |
4fa1e629 | 148 | TBranch *nbranch=v0Tree->GetBranch("negative"); |
149 | if (!nbranch) { | |
150 | ::Error("AliV0Comparison.C","Can't get the negative daughter branch !"); | |
151 | return 4; | |
ca28c5f5 | 152 | } |
4fa1e629 | 153 | TClonesArray dumm("AliTrackReference",1000), *nrefs=&dumm; |
154 | nbranch->SetAddress(&nrefs); | |
155 | ||
156 | ||
157 | sprintf(fname,"%s/AliESDs.root",dir); | |
158 | TFile *ef=TFile::Open(fname); | |
159 | if ((!ef)||(!ef->IsOpen())) { | |
160 | sprintf(fname,"%s/AliESDv0.root",dir); | |
161 | ef=TFile::Open(fname); | |
162 | if ((!ef)||(!ef->IsOpen())) { | |
163 | ::Error("AliV0Comparison.C","Can't open AliESDv0.root !"); | |
164 | return 5; | |
165 | } | |
ca28c5f5 | 166 | } |
4514157e | 167 | AliESDEvent* event = new AliESDEvent(); |
8b462fd8 | 168 | TTree* esdTree = (TTree*) ef->Get("esdTree"); |
169 | if (!esdTree) { | |
170 | ::Error("AliV0Comparison.C", "no ESD tree found"); | |
171 | return 6; | |
172 | } | |
86ad5fcb | 173 | event->ReadFromTree(esdTree); |
4fa1e629 | 174 | |
175 | ||
176 | //******* Loop over events ********* | |
177 | Int_t e=0; | |
8b462fd8 | 178 | while (esdTree->GetEvent(e)) { |
4fa1e629 | 179 | cout<<endl<<endl<<"********* Processing event number: "<<e<<"*******\n"; |
180 | ||
4fa1e629 | 181 | Int_t nentr=event->GetNumberOfV0s(); |
182 | allfound+=nentr; | |
ca28c5f5 | 183 | |
4fa1e629 | 184 | if (v0Tree->GetEvent(e++)==0) { |
185 | cerr<<"No reconstructable V0s !\n"; | |
186 | continue; | |
187 | } | |
ca28c5f5 | 188 | |
4fa1e629 | 189 | Int_t ngood=prefs->GetEntriesFast(),ng=0; |
ca28c5f5 | 190 | |
4fa1e629 | 191 | Double_t pxg=0.,pyg=0.,pzg=0.,ptg=0.; |
192 | Int_t nlab=-1, plab=-1; | |
193 | Int_t i; | |
194 | for (i=0; i<nentr; i++) { | |
195 | AliESDv0 *vertex=event->GetV0(i); | |
196 | ||
d6a49f20 | 197 | if (vertex->GetOnFlyStatus()) continue; |
198 | ||
4fa1e629 | 199 | Int_t nidx=TMath::Abs(vertex->GetNindex()); |
200 | Int_t pidx=TMath::Abs(vertex->GetPindex()); | |
201 | ||
202 | AliESDtrack *ntrack=event->GetTrack(nidx); | |
203 | AliESDtrack *ptrack=event->GetTrack(pidx); | |
204 | ||
205 | nlab=TMath::Abs(ntrack->GetLabel()); | |
206 | plab=TMath::Abs(ptrack->GetLabel()); | |
207 | ||
208 | /** Kinematical cuts **/ | |
209 | Double_t pxn,pyn,pzn; vertex->GetNPxPyPz(pxn,pyn,pzn); | |
210 | Double_t ptn=TMath::Sqrt(pxn*pxn + pyn*pyn); | |
211 | if (ptn < ptncut) continue; | |
212 | Double_t pxp,pyp,pzp; vertex->GetPPxPyPz(pxp,pyp,pzp); | |
213 | Double_t ptp=TMath::Sqrt(pxp*pxp + pyp*pyp); | |
214 | if (ptp < ptpcut) continue; | |
215 | Double_t kine=vertex->ChangeMassHypothesis(code); | |
216 | //if (TMath::Abs(kine)>kinecut) continue; | |
217 | ||
218 | Double_t mass=vertex->GetEffMass(); | |
219 | v0s->Fill(mass); | |
220 | v0sf->Fill(mass); | |
221 | ||
222 | AliTrackReference *nref=0, *pref=0; | |
223 | Int_t j; | |
224 | for (j=0; j<ngood; j++) { | |
225 | nref=(AliTrackReference*)nrefs->UncheckedAt(j); | |
226 | pref=(AliTrackReference*)prefs->UncheckedAt(j); | |
227 | if (nref->Label() == nlab) | |
228 | if (pref->Label() == plab) break; | |
229 | } | |
230 | ||
231 | if (TMath::Abs(mass-V0mass)>V0width) continue; | |
232 | ||
233 | Double_t px,py,pz; vertex->GetPxPyPz(px,py,pz); | |
234 | Double_t pt=TMath::Sqrt(px*px+py*py); | |
235 | ||
236 | if (j==ngood) { | |
237 | hfake->Fill(pt); | |
238 | cout<<"Fake vertex: ("<<nlab<<","<<plab<<")\n"; | |
239 | continue; | |
240 | } | |
241 | v0sf->Fill(mass,-1); | |
242 | ||
243 | pxg=nref->Px()+pref->Px(); pyg=nref->Py()+pref->Py(); | |
244 | pzg=nref->Pz()+pref->Pz(); | |
245 | ptg=TMath::Sqrt(pxg*pxg+pyg*pyg); | |
246 | Double_t phig=TMath::ATan2(pyg,pxg), phi=TMath::ATan2(py,px); | |
247 | Double_t lamg=TMath::ATan2(pzg,ptg), lam=TMath::ATan2(pz,pt); | |
248 | hp->Fill((phi - phig)*1000.); | |
249 | hl->Fill((lam - lamg)*1000.); | |
250 | hpt->Fill((1/pt - 1/ptg)/(1/ptg)*100.); | |
251 | ||
252 | Double_t x,y,z; vertex->GetXYZ(x,y,z); | |
253 | hx->Fill((x - nref->X())*10); | |
254 | hy->Fill((y - nref->Y())*10); | |
255 | hz->Fill((z - nref->Z())*10); | |
256 | ||
257 | hfound->Fill(ptg); | |
258 | nref->SetLabel(-1); | |
259 | ||
260 | } | |
261 | for (i=0; i<ngood; i++) { | |
262 | AliTrackReference *nref=(AliTrackReference*)nrefs->UncheckedAt(i); | |
263 | AliTrackReference *pref=(AliTrackReference*)prefs->UncheckedAt(i); | |
264 | Int_t pdg=(Int_t)nref->GetLength();//this is the mother's PDG ! | |
265 | if (code!=pdg) continue; | |
266 | ng++; | |
267 | pxg=nref->Px()+pref->Px(); pyg=nref->Py()+pref->Py(); | |
268 | ptg=TMath::Sqrt(pxg*pxg+pyg*pyg); | |
269 | hgood->Fill(ptg); | |
270 | nlab=nref->Label(); plab=pref->Label(); | |
271 | if (nlab < 0) continue; | |
272 | cout<<"Vertex ("<<nlab<<','<<plab<<") has not been found !\n"; | |
273 | } | |
274 | allgood+=ng; | |
275 | ||
276 | cout<<"Number of found V0s : "<<nentr<<endl; | |
277 | cout<<"Number of \"good\" V0s : "<<ng<<endl; | |
278 | ||
279 | prefs->Clear(); | |
280 | nrefs->Clear(); | |
4fa1e629 | 281 | |
282 | } //**** End of the loop over events | |
283 | ||
8b462fd8 | 284 | delete event; |
4514157e | 285 | delete esdTree; |
4fa1e629 | 286 | ef->Close(); |
287 | ||
288 | delete v0Tree; | |
289 | refFile->Close(); | |
ca28c5f5 | 290 | |
4fa1e629 | 291 | Stat_t ng=hgood->GetEntries(), nf=hfound->GetEntries(); |
292 | if (ng!=0) cout<<"Integral efficiency is about "<<nf/ng*100.<<" %\n"; | |
293 | cout<<"Total number of found V0s: "<<allfound<<" ("<<nf<<" in the peak)\n"; | |
294 | cout<<"Total number of \"good\" V0s: "<<allgood<<endl; | |
ca28c5f5 | 295 | |
296 | gStyle->SetOptStat(111110); | |
297 | gStyle->SetOptFit(1); | |
298 | ||
4fa1e629 | 299 | TCanvas *c1=(TCanvas*)gROOT->FindObject("c1"); |
300 | if (!c1) { | |
301 | c1=new TCanvas("c1","",0,0,580,610); | |
302 | c1->Divide(2,2); | |
303 | } | |
304 | ||
305 | Int_t minc=33; | |
ca28c5f5 | 306 | |
307 | c1->cd(1); | |
308 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
4fa1e629 | 309 | if (hp->GetEntries()<minc) hp->Draw(); else hp->Fit("gaus"); |
ca28c5f5 | 310 | hl->Draw("same"); c1->cd(); |
311 | ||
312 | c1->cd(2); | |
313 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
4fa1e629 | 314 | if (hpt->GetEntries()<minc) hpt->Draw(); else hpt->Fit("gaus"); |
315 | c1->cd(); | |
ca28c5f5 | 316 | |
317 | c1->cd(3); | |
318 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
4fa1e629 | 319 | if (hx->GetEntries()<minc) hx->Draw(); else hx->Fit("gaus"); |
ca28c5f5 | 320 | hy->Draw("same"); c1->cd(); |
321 | ||
322 | c1->cd(4); | |
323 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
4fa1e629 | 324 | if (hz->GetEntries()<minc) hz->Draw(); else hz->Fit("gaus"); |
ca28c5f5 | 325 | |
4fa1e629 | 326 | c1->Update(); |
ca28c5f5 | 327 | |
4fa1e629 | 328 | TCanvas *c2=(TCanvas*)gROOT->FindObject("c2"); |
329 | if (!c2) { | |
330 | c2=new TCanvas("c2","",600,0,580,610); | |
331 | c2->Divide(1,2); | |
332 | } | |
ca28c5f5 | 333 | |
334 | c2->cd(1); | |
335 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
336 | hfound->Sumw2(); hgood->Sumw2(); hfake->Sumw2(); | |
337 | hg->Divide(hfound,hgood,1,1.,"b"); | |
338 | hf->Divide(hfake,hgood,1,1.,"b"); | |
339 | hg->SetMaximum(1.4); | |
340 | hg->SetYTitle("V0 reconstruction efficiency"); | |
341 | hg->SetXTitle("Pt (GeV/c)"); | |
342 | hg->Draw(); | |
343 | ||
344 | TLine *line1 = new TLine(pmin,1.0,pmax,1.0); line1->SetLineStyle(4); | |
345 | line1->Draw("same"); | |
346 | TLine *line2 = new TLine(pmin,0.9,pmax,0.9); line2->SetLineStyle(4); | |
347 | line2->Draw("same"); | |
348 | ||
349 | hf->SetFillColor(1); | |
350 | hf->SetFillStyle(3013); | |
351 | hf->SetLineColor(2); | |
352 | hf->SetLineWidth(2); | |
353 | hf->Draw("histsame"); | |
354 | TText *text = new TText(0.461176,0.248448,"Fake vertices"); | |
355 | text->SetTextSize(0.05); | |
356 | text->Draw(); | |
357 | text = new TText(0.453919,1.11408,"Good vertices"); | |
358 | text->SetTextSize(0.05); | |
359 | text->Draw(); | |
360 | ||
361 | ||
362 | c2->cd(2); | |
363 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
4fa1e629 | 364 | if (v0s->GetEntries()<minc) v0s->Draw(); |
365 | else v0s->Fit("gaus","","",V0mass-V0width,V0mass+V0width); | |
04b2a5f1 | 366 | v0sf->Draw("same"); |
ca28c5f5 | 367 | Double_t max=v0s->GetMaximum(); |
368 | TLine *line3 = new TLine(V0mass-V0width,0.,V0mass-V0width,max); | |
369 | line3->Draw("same"); | |
370 | TLine *line4 = new TLine(V0mass+V0width,0.,V0mass+V0width,max); | |
371 | line4->Draw("same"); | |
372 | ||
4fa1e629 | 373 | c2->Update(); |
374 | ||
375 | TFile fc("AliV0Comparison.root","RECREATE"); | |
376 | c1->Write(); | |
377 | c2->Write(); | |
378 | fc.Close(); | |
379 | ||
380 | gBenchmark->Stop("AliV0Comparison"); | |
381 | gBenchmark->Show("AliV0Comparison"); | |
ca28c5f5 | 382 | |
383 | return 0; | |
384 | } | |
385 | ||
ca28c5f5 | 386 | |
4fa1e629 | 387 | Int_t GoodV0s(const Char_t *dir) { |
388 | if (gAlice) { | |
389 | delete gAlice->GetRunLoader(); | |
390 | delete gAlice;//if everything was OK here it is already NULL | |
391 | gAlice = 0x0; | |
ca28c5f5 | 392 | } |
393 | ||
4fa1e629 | 394 | Char_t fname[100]; |
395 | sprintf(fname,"%s/galice.root",dir); | |
396 | ||
397 | AliRunLoader *rl = AliRunLoader::Open(fname,"COMPARISON"); | |
5102bab6 | 398 | if (!rl) { |
4fa1e629 | 399 | ::Error("GoodTracksITS","Can't start session !"); |
400 | return 1; | |
ca28c5f5 | 401 | } |
5102bab6 | 402 | |
566abf75 | 403 | rl->LoadgAlice(); |
404 | rl->LoadHeader(); | |
405 | rl->LoadKinematics(); | |
4fa1e629 | 406 | |
407 | ||
408 | Int_t nev=rl->GetNumberOfEvents(); | |
409 | ::Info("GoodV0s","Number of events : %d\n",nev); | |
410 | ||
411 | sprintf(fname,"%s/GoodTracksITS.root",dir); | |
412 | TFile *itsFile=TFile::Open(fname); | |
413 | if ((!itsFile)||(!itsFile->IsOpen())) { | |
414 | ::Error("GoodV0s","Can't open the GoodTracksITS.root !"); | |
415 | delete rl; | |
416 | return 5; | |
417 | } | |
418 | TClonesArray dum("AliTrackReference",1000), *itsRefs=&dum; | |
419 | TTree *itsTree=(TTree*)itsFile->Get("itsTree"); | |
420 | if (!itsTree) { | |
421 | ::Error("GoodV0s","Can't get the ITS reference tree !"); | |
422 | delete rl; | |
423 | return 6; | |
424 | } | |
425 | TBranch *itsBranch=itsTree->GetBranch("ITS"); | |
426 | if (!itsBranch) { | |
427 | ::Error("GoodV0s","Can't get the ITS reference branch !"); | |
428 | delete rl; | |
429 | return 7; | |
430 | } | |
431 | itsBranch->SetAddress(&itsRefs); | |
432 | ||
433 | ||
434 | sprintf(fname,"%s/GoodV0s.root",dir); | |
435 | TFile *v0File=TFile::Open(fname,"recreate"); | |
436 | TClonesArray dummy("AliTrackReference",1000), *nrefs=&dummy; | |
437 | TClonesArray dumm("AliTrackReference",1000), *prefs=&dumm; | |
438 | TTree v0Tree("v0Tree","Tree with info about the reconstructable V0s"); | |
439 | v0Tree.Branch("negative",&nrefs); | |
440 | v0Tree.Branch("positive",&prefs); | |
441 | ||
442 | ||
443 | /*** Some information about the cuts ***/ | |
444 | Double_t r2min=0.9*0.9; | |
445 | Double_t r2max=2.9*2.9; | |
446 | ||
447 | ||
448 | ||
449 | //******** Loop over generated events | |
450 | for (Int_t e=0; e<nev; e++) { | |
451 | rl->GetEvent(e); v0File->cd(); | |
452 | ||
453 | Int_t np = rl->GetHeader()->GetNtrack(); | |
454 | cout<<"Event "<<e<<" Number of particles: "<<np<<endl; | |
455 | ||
456 | itsTree->GetEvent(e); | |
457 | Int_t nk=itsRefs->GetEntriesFast(); | |
458 | ||
459 | AliStack *stack=rl->Stack(); | |
460 | ||
461 | AliTrackReference *nref=0, *pref=0; | |
462 | ||
463 | Int_t nv=0; | |
464 | while (np--) { | |
465 | //cerr<<np<<'\r'; | |
466 | TParticle *p0=stack->Particle(np); | |
467 | ||
468 | /*** only these V0s are "good" ***/ | |
469 | Int_t code=p0->GetPdgCode(); | |
470 | if (code!=kK0Short) | |
471 | if (code!=kLambda0) | |
472 | if (code!=kLambda0Bar) continue; | |
473 | ||
474 | /*** daughter tracks should be "good" ***/ | |
475 | Int_t plab=p0->GetFirstDaughter(), nlab=p0->GetLastDaughter(); | |
476 | if (nlab==plab) continue; | |
477 | if (nlab<0) continue; | |
478 | if (plab<0) continue; | |
479 | Int_t i; | |
60f349ea | 480 | TParticle * part = stack->Particle(plab); |
481 | if (part) { | |
482 | TParticlePDG * partPDG = part->GetPDG(); | |
483 | if (partPDG && partPDG->Charge() < 0.) { | |
484 | i=plab; plab=nlab; nlab=i; | |
485 | } | |
486 | } | |
4fa1e629 | 487 | |
488 | for (i=0; i<nk; i++) { | |
489 | nref=(AliTrackReference*)itsRefs->UncheckedAt(i); | |
490 | if (nref->Label()==nlab) break; | |
491 | } | |
492 | if (i==nk) continue; | |
493 | for (i=0; i<nk; i++) { | |
494 | pref=(AliTrackReference*)itsRefs->UncheckedAt(i); | |
495 | if (pref->Label()==plab) break; | |
496 | } | |
497 | if (i==nk) continue; | |
498 | ||
499 | /*** fiducial volume ***/ | |
500 | TParticle *p=stack->Particle(nlab); | |
501 | Double_t x=p->Vx(), y=p->Vy(), z=p->Vz(), r2=x*x+y*y; | |
502 | if (r2<r2min) continue; | |
503 | if (r2>r2max) continue; | |
ca28c5f5 | 504 | |
4fa1e629 | 505 | Int_t pdg=p0->GetPdgCode(); |
506 | nref->SetLength(pdg); //This will the V0's PDG ! | |
507 | ||
508 | new((*nrefs)[nv]) AliTrackReference(*nref); | |
509 | new((*prefs)[nv]) AliTrackReference(*pref); | |
510 | ||
511 | nv++; | |
ca28c5f5 | 512 | } |
4fa1e629 | 513 | itsRefs->Clear(); |
ca28c5f5 | 514 | |
4fa1e629 | 515 | v0Tree.Fill(); |
516 | nrefs->Clear(); prefs->Clear(); | |
517 | ||
518 | } //**** end of the loop over generated events | |
519 | ||
520 | v0Tree.Write(); | |
521 | v0File->Close(); | |
522 | ||
523 | delete itsTree; | |
524 | itsFile->Close(); | |
525 | ||
526 | delete rl; | |
527 | return 0; | |
ca28c5f5 | 528 | } |