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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 | * * | |
1330b1b0 | 7 | * To get the list of the "findable" V0s, you should first get the list * |
8 | * of "findable" tracks, which can be done by running * | |
9 | * TPC/AliTPCComparison.C and ITS/AliITSComparisonV2.C macros. * | |
10 | * * | |
ca28c5f5 | 11 | * Origin: I.Belikov, IReS, Strasbourg, Jouri.Belikov@cern.ch * |
12 | ****************************************************************************/ | |
13 | ||
566abf75 | 14 | #if !defined(__CINT__) || defined(__MAKECINT__) |
4fa1e629 | 15 | #include <TMath.h> |
16 | #include <TError.h> | |
17 | #include <Riostream.h> | |
18 | #include <TH1F.h> | |
19 | #include <TTree.h> | |
20 | #include <TParticle.h> | |
1330b1b0 | 21 | #include <TPDGCode.h> |
4fa1e629 | 22 | #include <TCanvas.h> |
23 | #include <TLine.h> | |
24 | #include <TText.h> | |
25 | #include <TBenchmark.h> | |
26 | #include <TStyle.h> | |
8b462fd8 | 27 | #include <TFile.h> |
4fa1e629 | 28 | #include <TROOT.h> |
29 | ||
30 | #include "AliStack.h" | |
566abf75 | 31 | #include "AliHeader.h" |
4fa1e629 | 32 | #include "AliTrackReference.h" |
566abf75 | 33 | #include "AliRunLoader.h" |
ca28c5f5 | 34 | #include "AliRun.h" |
86ad5fcb | 35 | #include "AliESDEvent.h" |
1330b1b0 | 36 | #include "AliESDv0.h" |
ca28c5f5 | 37 | #endif |
38 | ||
4fa1e629 | 39 | Int_t GoodV0s(const Char_t *dir="."); |
ca28c5f5 | 40 | |
566abf75 | 41 | extern AliRun *gAlice; |
4fa1e629 | 42 | extern TBenchmark *gBenchmark; |
43 | extern TROOT *gROOT; | |
566abf75 | 44 | |
4fa1e629 | 45 | static Int_t allgood=0; |
46 | static Int_t allfound=0; | |
5102bab6 | 47 | |
4fa1e629 | 48 | Int_t AliV0Comparison(Int_t code=310, const Char_t *dir=".") { |
49 | //Lambda=3122, LambdaBar=-3122 | |
50 | gBenchmark->Start("AliV0Comparison"); | |
51 | ||
52 | ::Info("AliV0Comparison.C","Doing comparison..."); | |
5102bab6 | 53 | |
54 | ||
04b2a5f1 | 55 | const Double_t V0window=0.05; |
56 | Double_t ptncut=0.13, ptpcut=0.13, kinecut=0.03; | |
57 | Double_t V0mass=0.497672, V0width=0.020; | |
ca28c5f5 | 58 | switch (code) { |
04b2a5f1 | 59 | case kK0Short: |
60 | break; | |
61 | case kLambda0: | |
62 | V0mass=1.115683; V0width=0.015; ptpcut=0.50; kinecut=0.002; | |
63 | break; | |
64 | case kLambda0Bar: | |
65 | V0mass=1.115683; V0width=0.015; ptncut=0.50; kinecut=0.002; | |
66 | break; | |
ca28c5f5 | 67 | default: cerr<<"Invalid PDG code !\n"; return 1; |
68 | } | |
69 | ||
4fa1e629 | 70 | TH1F *hp=(TH1F*)gROOT->FindObject("hp"); |
71 | if (!hp) hp=new TH1F("hp","PHI Resolution",30,-30.,30.); | |
566abf75 | 72 | hp->SetXTitle("(mrad)"); hp->SetFillColor(2); |
4fa1e629 | 73 | |
74 | TH1F *hl=(TH1F*)gROOT->FindObject("hl"); | |
75 | if (!hl) hl=new TH1F("hl","LAMBDA Resolution",30,-30,30); | |
76 | hl->SetXTitle("(mrad)"); hl->SetFillColor(1); hl->SetFillStyle(3013); | |
77 | ||
78 | TH1F *hpt=(TH1F*)gROOT->FindObject("hpt"); | |
79 | if (!hpt) hpt=new TH1F("hpt","Relative Pt Resolution",30,-10.,10.); | |
566abf75 | 80 | hpt->SetXTitle("(%)"); hpt->SetFillColor(2); |
81 | ||
4fa1e629 | 82 | TH1F *hx=(TH1F*)gROOT->FindObject("hx"); |
83 | if (!hx) hx=new TH1F("hx","Position Resolution (X)",30,-3.,3.); | |
566abf75 | 84 | hx->SetXTitle("(mm)"); hx->SetFillColor(6); |
4fa1e629 | 85 | |
86 | TH1F *hy=(TH1F*)gROOT->FindObject("hy"); | |
87 | if (!hy) hy=new TH1F("hy","Position Resolution (Y)",30,-3.,3.); | |
566abf75 | 88 | hy->SetXTitle("(mm)"); hy->SetFillColor(1); hy->SetFillStyle(3013); |
4fa1e629 | 89 | |
90 | TH1F *hz=(TH1F*)gROOT->FindObject("hz"); | |
91 | if (!hz) hz=new TH1F("hz","Position Resolution (Z)",30,-3.,3.); | |
566abf75 | 92 | hz->SetXTitle("(mm)"); hz->SetFillColor(6); |
93 | ||
94 | ||
95 | Double_t pmin=0.2, pmax=4.2; Int_t nchan=20; | |
4fa1e629 | 96 | TH1F *hgood=(TH1F*)gROOT->FindObject("hgood"); |
97 | if (!hgood) hgood=new TH1F("hgood","Good Vertices",nchan,pmin,pmax); | |
98 | ||
99 | TH1F *hfound=(TH1F*)gROOT->FindObject("hfound"); | |
100 | if (!hfound) hfound=new TH1F("hfound","Found Vertices",nchan,pmin,pmax); | |
101 | ||
102 | TH1F *hfake=(TH1F*)gROOT->FindObject("hfake"); | |
103 | if (!hfake) hfake=new TH1F("hfake","Fake Vertices",nchan,pmin,pmax); | |
104 | ||
105 | TH1F *hg=(TH1F*)gROOT->FindObject("hg"); | |
106 | if (!hg) hg=new TH1F("hg","Efficiency for Good Vertices",nchan,pmin,pmax); | |
566abf75 | 107 | hg->SetLineColor(4); hg->SetLineWidth(2); |
4fa1e629 | 108 | |
109 | TH1F *hf=(TH1F*)gROOT->FindObject("hf"); | |
110 | if (!hf) hf=new TH1F("hf","Probability of Fake Vertices",nchan,pmin,pmax); | |
566abf75 | 111 | hf->SetFillColor(1); hf->SetFillStyle(3013); hf->SetLineWidth(2); |
112 | ||
4fa1e629 | 113 | |
566abf75 | 114 | Double_t mmin=V0mass-V0window, mmax=V0mass+V0window; |
4fa1e629 | 115 | TH1F *v0s=(TH1F*)gROOT->FindObject("v0s"); |
116 | if (!v0s) v0s=new TH1F("v0s","V0s Effective Mass",40, mmin, mmax); | |
117 | v0s->SetXTitle("(GeV)"); v0s->SetLineColor(4); v0s->SetLineWidth(4); | |
118 | ||
119 | TH1F *v0sf=(TH1F*)gROOT->FindObject("v0sf"); | |
120 | if (!v0sf) v0sf=new TH1F("v0sf","Fake V0s Effective Mass",40, mmin, mmax); | |
566abf75 | 121 | v0sf->SetXTitle("(GeV)"); v0sf->SetFillColor(6); |
122 | ||
123 | ||
4fa1e629 | 124 | Char_t fname[100]; |
125 | sprintf(fname,"%s/GoodV0s.root",dir); | |
126 | ||
127 | TFile *refFile=TFile::Open(fname,"old"); | |
128 | if (!refFile || !refFile->IsOpen()) { | |
129 | ::Info("AliV0Comparison.C","Marking good V0s (will take a while)..."); | |
130 | if (GoodV0s(dir)) { | |
131 | ::Error("AliV0Comparison.C","Can't generate the reference file !"); | |
132 | return 1; | |
133 | } | |
134 | } | |
135 | refFile=TFile::Open(fname,"old"); | |
136 | if (!refFile || !refFile->IsOpen()) { | |
137 | ::Error("AliV0Comparison.C","Can't open the reference file !"); | |
138 | return 1; | |
139 | } | |
140 | ||
141 | TTree *v0Tree=(TTree*)refFile->Get("v0Tree"); | |
142 | if (!v0Tree) { | |
143 | ::Error("AliV0Comparison.C","Can't get the reference tree !"); | |
144 | return 2; | |
145 | } | |
146 | TBranch *pbranch=v0Tree->GetBranch("positive"); | |
147 | if (!pbranch) { | |
148 | ::Error("AliV0Comparison.C","Can't get the positive daughter branch !"); | |
149 | return 3; | |
150 | } | |
151 | TClonesArray dummy("AliTrackReference",1000), *prefs=&dummy; | |
152 | pbranch->SetAddress(&prefs); | |
ca28c5f5 | 153 | |
4fa1e629 | 154 | TBranch *nbranch=v0Tree->GetBranch("negative"); |
155 | if (!nbranch) { | |
156 | ::Error("AliV0Comparison.C","Can't get the negative daughter branch !"); | |
157 | return 4; | |
ca28c5f5 | 158 | } |
4fa1e629 | 159 | TClonesArray dumm("AliTrackReference",1000), *nrefs=&dumm; |
160 | nbranch->SetAddress(&nrefs); | |
161 | ||
162 | ||
163 | sprintf(fname,"%s/AliESDs.root",dir); | |
164 | TFile *ef=TFile::Open(fname); | |
165 | if ((!ef)||(!ef->IsOpen())) { | |
166 | sprintf(fname,"%s/AliESDv0.root",dir); | |
167 | ef=TFile::Open(fname); | |
168 | if ((!ef)||(!ef->IsOpen())) { | |
169 | ::Error("AliV0Comparison.C","Can't open AliESDv0.root !"); | |
170 | return 5; | |
171 | } | |
ca28c5f5 | 172 | } |
4514157e | 173 | AliESDEvent* event = new AliESDEvent(); |
8b462fd8 | 174 | TTree* esdTree = (TTree*) ef->Get("esdTree"); |
175 | if (!esdTree) { | |
176 | ::Error("AliV0Comparison.C", "no ESD tree found"); | |
177 | return 6; | |
178 | } | |
86ad5fcb | 179 | event->ReadFromTree(esdTree); |
4fa1e629 | 180 | |
181 | ||
182 | //******* Loop over events ********* | |
183 | Int_t e=0; | |
8b462fd8 | 184 | while (esdTree->GetEvent(e)) { |
4fa1e629 | 185 | cout<<endl<<endl<<"********* Processing event number: "<<e<<"*******\n"; |
186 | ||
4fa1e629 | 187 | Int_t nentr=event->GetNumberOfV0s(); |
188 | allfound+=nentr; | |
ca28c5f5 | 189 | |
4fa1e629 | 190 | if (v0Tree->GetEvent(e++)==0) { |
191 | cerr<<"No reconstructable V0s !\n"; | |
192 | continue; | |
193 | } | |
ca28c5f5 | 194 | |
4fa1e629 | 195 | Int_t ngood=prefs->GetEntriesFast(),ng=0; |
ca28c5f5 | 196 | |
4fa1e629 | 197 | Double_t pxg=0.,pyg=0.,pzg=0.,ptg=0.; |
198 | Int_t nlab=-1, plab=-1; | |
199 | Int_t i; | |
200 | for (i=0; i<nentr; i++) { | |
201 | AliESDv0 *vertex=event->GetV0(i); | |
202 | ||
d6a49f20 | 203 | if (vertex->GetOnFlyStatus()) continue; |
204 | ||
4fa1e629 | 205 | Int_t nidx=TMath::Abs(vertex->GetNindex()); |
206 | Int_t pidx=TMath::Abs(vertex->GetPindex()); | |
207 | ||
208 | AliESDtrack *ntrack=event->GetTrack(nidx); | |
209 | AliESDtrack *ptrack=event->GetTrack(pidx); | |
210 | ||
211 | nlab=TMath::Abs(ntrack->GetLabel()); | |
212 | plab=TMath::Abs(ptrack->GetLabel()); | |
213 | ||
214 | /** Kinematical cuts **/ | |
215 | Double_t pxn,pyn,pzn; vertex->GetNPxPyPz(pxn,pyn,pzn); | |
216 | Double_t ptn=TMath::Sqrt(pxn*pxn + pyn*pyn); | |
217 | if (ptn < ptncut) continue; | |
218 | Double_t pxp,pyp,pzp; vertex->GetPPxPyPz(pxp,pyp,pzp); | |
219 | Double_t ptp=TMath::Sqrt(pxp*pxp + pyp*pyp); | |
220 | if (ptp < ptpcut) continue; | |
221 | Double_t kine=vertex->ChangeMassHypothesis(code); | |
222 | //if (TMath::Abs(kine)>kinecut) continue; | |
223 | ||
224 | Double_t mass=vertex->GetEffMass(); | |
225 | v0s->Fill(mass); | |
226 | v0sf->Fill(mass); | |
227 | ||
228 | AliTrackReference *nref=0, *pref=0; | |
229 | Int_t j; | |
230 | for (j=0; j<ngood; j++) { | |
231 | nref=(AliTrackReference*)nrefs->UncheckedAt(j); | |
232 | pref=(AliTrackReference*)prefs->UncheckedAt(j); | |
233 | if (nref->Label() == nlab) | |
234 | if (pref->Label() == plab) break; | |
235 | } | |
236 | ||
237 | if (TMath::Abs(mass-V0mass)>V0width) continue; | |
238 | ||
239 | Double_t px,py,pz; vertex->GetPxPyPz(px,py,pz); | |
240 | Double_t pt=TMath::Sqrt(px*px+py*py); | |
241 | ||
242 | if (j==ngood) { | |
243 | hfake->Fill(pt); | |
244 | cout<<"Fake vertex: ("<<nlab<<","<<plab<<")\n"; | |
245 | continue; | |
246 | } | |
247 | v0sf->Fill(mass,-1); | |
248 | ||
249 | pxg=nref->Px()+pref->Px(); pyg=nref->Py()+pref->Py(); | |
250 | pzg=nref->Pz()+pref->Pz(); | |
251 | ptg=TMath::Sqrt(pxg*pxg+pyg*pyg); | |
252 | Double_t phig=TMath::ATan2(pyg,pxg), phi=TMath::ATan2(py,px); | |
253 | Double_t lamg=TMath::ATan2(pzg,ptg), lam=TMath::ATan2(pz,pt); | |
254 | hp->Fill((phi - phig)*1000.); | |
255 | hl->Fill((lam - lamg)*1000.); | |
256 | hpt->Fill((1/pt - 1/ptg)/(1/ptg)*100.); | |
257 | ||
258 | Double_t x,y,z; vertex->GetXYZ(x,y,z); | |
259 | hx->Fill((x - nref->X())*10); | |
260 | hy->Fill((y - nref->Y())*10); | |
261 | hz->Fill((z - nref->Z())*10); | |
262 | ||
263 | hfound->Fill(ptg); | |
264 | nref->SetLabel(-1); | |
265 | ||
266 | } | |
267 | for (i=0; i<ngood; i++) { | |
268 | AliTrackReference *nref=(AliTrackReference*)nrefs->UncheckedAt(i); | |
269 | AliTrackReference *pref=(AliTrackReference*)prefs->UncheckedAt(i); | |
270 | Int_t pdg=(Int_t)nref->GetLength();//this is the mother's PDG ! | |
271 | if (code!=pdg) continue; | |
272 | ng++; | |
273 | pxg=nref->Px()+pref->Px(); pyg=nref->Py()+pref->Py(); | |
274 | ptg=TMath::Sqrt(pxg*pxg+pyg*pyg); | |
275 | hgood->Fill(ptg); | |
276 | nlab=nref->Label(); plab=pref->Label(); | |
277 | if (nlab < 0) continue; | |
278 | cout<<"Vertex ("<<nlab<<','<<plab<<") has not been found !\n"; | |
279 | } | |
280 | allgood+=ng; | |
281 | ||
282 | cout<<"Number of found V0s : "<<nentr<<endl; | |
283 | cout<<"Number of \"good\" V0s : "<<ng<<endl; | |
284 | ||
285 | prefs->Clear(); | |
286 | nrefs->Clear(); | |
4fa1e629 | 287 | |
288 | } //**** End of the loop over events | |
289 | ||
8b462fd8 | 290 | delete event; |
4514157e | 291 | delete esdTree; |
4fa1e629 | 292 | ef->Close(); |
293 | ||
294 | delete v0Tree; | |
295 | refFile->Close(); | |
ca28c5f5 | 296 | |
4fa1e629 | 297 | Stat_t ng=hgood->GetEntries(), nf=hfound->GetEntries(); |
298 | if (ng!=0) cout<<"Integral efficiency is about "<<nf/ng*100.<<" %\n"; | |
299 | cout<<"Total number of found V0s: "<<allfound<<" ("<<nf<<" in the peak)\n"; | |
300 | cout<<"Total number of \"good\" V0s: "<<allgood<<endl; | |
ca28c5f5 | 301 | |
302 | gStyle->SetOptStat(111110); | |
303 | gStyle->SetOptFit(1); | |
304 | ||
4fa1e629 | 305 | TCanvas *c1=(TCanvas*)gROOT->FindObject("c1"); |
306 | if (!c1) { | |
307 | c1=new TCanvas("c1","",0,0,580,610); | |
308 | c1->Divide(2,2); | |
309 | } | |
310 | ||
311 | Int_t minc=33; | |
ca28c5f5 | 312 | |
313 | c1->cd(1); | |
314 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
4fa1e629 | 315 | if (hp->GetEntries()<minc) hp->Draw(); else hp->Fit("gaus"); |
ca28c5f5 | 316 | hl->Draw("same"); c1->cd(); |
317 | ||
318 | c1->cd(2); | |
319 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
4fa1e629 | 320 | if (hpt->GetEntries()<minc) hpt->Draw(); else hpt->Fit("gaus"); |
321 | c1->cd(); | |
ca28c5f5 | 322 | |
323 | c1->cd(3); | |
324 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
4fa1e629 | 325 | if (hx->GetEntries()<minc) hx->Draw(); else hx->Fit("gaus"); |
ca28c5f5 | 326 | hy->Draw("same"); c1->cd(); |
327 | ||
328 | c1->cd(4); | |
329 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
4fa1e629 | 330 | if (hz->GetEntries()<minc) hz->Draw(); else hz->Fit("gaus"); |
ca28c5f5 | 331 | |
4fa1e629 | 332 | c1->Update(); |
ca28c5f5 | 333 | |
4fa1e629 | 334 | TCanvas *c2=(TCanvas*)gROOT->FindObject("c2"); |
335 | if (!c2) { | |
336 | c2=new TCanvas("c2","",600,0,580,610); | |
337 | c2->Divide(1,2); | |
338 | } | |
ca28c5f5 | 339 | |
340 | c2->cd(1); | |
341 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
342 | hfound->Sumw2(); hgood->Sumw2(); hfake->Sumw2(); | |
343 | hg->Divide(hfound,hgood,1,1.,"b"); | |
344 | hf->Divide(hfake,hgood,1,1.,"b"); | |
345 | hg->SetMaximum(1.4); | |
346 | hg->SetYTitle("V0 reconstruction efficiency"); | |
347 | hg->SetXTitle("Pt (GeV/c)"); | |
348 | hg->Draw(); | |
349 | ||
350 | TLine *line1 = new TLine(pmin,1.0,pmax,1.0); line1->SetLineStyle(4); | |
351 | line1->Draw("same"); | |
352 | TLine *line2 = new TLine(pmin,0.9,pmax,0.9); line2->SetLineStyle(4); | |
353 | line2->Draw("same"); | |
354 | ||
355 | hf->SetFillColor(1); | |
356 | hf->SetFillStyle(3013); | |
357 | hf->SetLineColor(2); | |
358 | hf->SetLineWidth(2); | |
359 | hf->Draw("histsame"); | |
360 | TText *text = new TText(0.461176,0.248448,"Fake vertices"); | |
361 | text->SetTextSize(0.05); | |
362 | text->Draw(); | |
363 | text = new TText(0.453919,1.11408,"Good vertices"); | |
364 | text->SetTextSize(0.05); | |
365 | text->Draw(); | |
366 | ||
367 | ||
368 | c2->cd(2); | |
369 | gPad->SetFillColor(42); gPad->SetFrameFillColor(10); | |
4fa1e629 | 370 | if (v0s->GetEntries()<minc) v0s->Draw(); |
371 | else v0s->Fit("gaus","","",V0mass-V0width,V0mass+V0width); | |
04b2a5f1 | 372 | v0sf->Draw("same"); |
ca28c5f5 | 373 | Double_t max=v0s->GetMaximum(); |
374 | TLine *line3 = new TLine(V0mass-V0width,0.,V0mass-V0width,max); | |
375 | line3->Draw("same"); | |
376 | TLine *line4 = new TLine(V0mass+V0width,0.,V0mass+V0width,max); | |
377 | line4->Draw("same"); | |
378 | ||
4fa1e629 | 379 | c2->Update(); |
380 | ||
381 | TFile fc("AliV0Comparison.root","RECREATE"); | |
382 | c1->Write(); | |
383 | c2->Write(); | |
384 | fc.Close(); | |
385 | ||
386 | gBenchmark->Stop("AliV0Comparison"); | |
387 | gBenchmark->Show("AliV0Comparison"); | |
ca28c5f5 | 388 | |
389 | return 0; | |
390 | } | |
391 | ||
ca28c5f5 | 392 | |
4fa1e629 | 393 | Int_t GoodV0s(const Char_t *dir) { |
394 | if (gAlice) { | |
395 | delete gAlice->GetRunLoader(); | |
396 | delete gAlice;//if everything was OK here it is already NULL | |
397 | gAlice = 0x0; | |
ca28c5f5 | 398 | } |
399 | ||
4fa1e629 | 400 | Char_t fname[100]; |
401 | sprintf(fname,"%s/galice.root",dir); | |
402 | ||
403 | AliRunLoader *rl = AliRunLoader::Open(fname,"COMPARISON"); | |
5102bab6 | 404 | if (!rl) { |
4fa1e629 | 405 | ::Error("GoodTracksITS","Can't start session !"); |
406 | return 1; | |
ca28c5f5 | 407 | } |
5102bab6 | 408 | |
566abf75 | 409 | rl->LoadgAlice(); |
410 | rl->LoadHeader(); | |
411 | rl->LoadKinematics(); | |
4fa1e629 | 412 | |
413 | ||
414 | Int_t nev=rl->GetNumberOfEvents(); | |
415 | ::Info("GoodV0s","Number of events : %d\n",nev); | |
416 | ||
417 | sprintf(fname,"%s/GoodTracksITS.root",dir); | |
418 | TFile *itsFile=TFile::Open(fname); | |
419 | if ((!itsFile)||(!itsFile->IsOpen())) { | |
420 | ::Error("GoodV0s","Can't open the GoodTracksITS.root !"); | |
421 | delete rl; | |
422 | return 5; | |
423 | } | |
424 | TClonesArray dum("AliTrackReference",1000), *itsRefs=&dum; | |
425 | TTree *itsTree=(TTree*)itsFile->Get("itsTree"); | |
426 | if (!itsTree) { | |
427 | ::Error("GoodV0s","Can't get the ITS reference tree !"); | |
428 | delete rl; | |
429 | return 6; | |
430 | } | |
431 | TBranch *itsBranch=itsTree->GetBranch("ITS"); | |
432 | if (!itsBranch) { | |
433 | ::Error("GoodV0s","Can't get the ITS reference branch !"); | |
434 | delete rl; | |
435 | return 7; | |
436 | } | |
437 | itsBranch->SetAddress(&itsRefs); | |
438 | ||
439 | ||
440 | sprintf(fname,"%s/GoodV0s.root",dir); | |
441 | TFile *v0File=TFile::Open(fname,"recreate"); | |
442 | TClonesArray dummy("AliTrackReference",1000), *nrefs=&dummy; | |
443 | TClonesArray dumm("AliTrackReference",1000), *prefs=&dumm; | |
444 | TTree v0Tree("v0Tree","Tree with info about the reconstructable V0s"); | |
445 | v0Tree.Branch("negative",&nrefs); | |
446 | v0Tree.Branch("positive",&prefs); | |
447 | ||
448 | ||
449 | /*** Some information about the cuts ***/ | |
450 | Double_t r2min=0.9*0.9; | |
451 | Double_t r2max=2.9*2.9; | |
452 | ||
453 | ||
454 | ||
455 | //******** Loop over generated events | |
456 | for (Int_t e=0; e<nev; e++) { | |
457 | rl->GetEvent(e); v0File->cd(); | |
458 | ||
459 | Int_t np = rl->GetHeader()->GetNtrack(); | |
460 | cout<<"Event "<<e<<" Number of particles: "<<np<<endl; | |
461 | ||
462 | itsTree->GetEvent(e); | |
463 | Int_t nk=itsRefs->GetEntriesFast(); | |
464 | ||
465 | AliStack *stack=rl->Stack(); | |
466 | ||
467 | AliTrackReference *nref=0, *pref=0; | |
468 | ||
469 | Int_t nv=0; | |
470 | while (np--) { | |
471 | //cerr<<np<<'\r'; | |
472 | TParticle *p0=stack->Particle(np); | |
473 | ||
474 | /*** only these V0s are "good" ***/ | |
475 | Int_t code=p0->GetPdgCode(); | |
476 | if (code!=kK0Short) | |
477 | if (code!=kLambda0) | |
478 | if (code!=kLambda0Bar) continue; | |
479 | ||
480 | /*** daughter tracks should be "good" ***/ | |
481 | Int_t plab=p0->GetFirstDaughter(), nlab=p0->GetLastDaughter(); | |
482 | if (nlab==plab) continue; | |
483 | if (nlab<0) continue; | |
484 | if (plab<0) continue; | |
485 | Int_t i; | |
60f349ea | 486 | TParticle * part = stack->Particle(plab); |
487 | if (part) { | |
488 | TParticlePDG * partPDG = part->GetPDG(); | |
489 | if (partPDG && partPDG->Charge() < 0.) { | |
490 | i=plab; plab=nlab; nlab=i; | |
491 | } | |
492 | } | |
4fa1e629 | 493 | |
494 | for (i=0; i<nk; i++) { | |
495 | nref=(AliTrackReference*)itsRefs->UncheckedAt(i); | |
496 | if (nref->Label()==nlab) break; | |
497 | } | |
498 | if (i==nk) continue; | |
499 | for (i=0; i<nk; i++) { | |
500 | pref=(AliTrackReference*)itsRefs->UncheckedAt(i); | |
501 | if (pref->Label()==plab) break; | |
502 | } | |
503 | if (i==nk) continue; | |
504 | ||
505 | /*** fiducial volume ***/ | |
506 | TParticle *p=stack->Particle(nlab); | |
507 | Double_t x=p->Vx(), y=p->Vy(), z=p->Vz(), r2=x*x+y*y; | |
508 | if (r2<r2min) continue; | |
509 | if (r2>r2max) continue; | |
ca28c5f5 | 510 | |
4fa1e629 | 511 | Int_t pdg=p0->GetPdgCode(); |
512 | nref->SetLength(pdg); //This will the V0's PDG ! | |
513 | ||
514 | new((*nrefs)[nv]) AliTrackReference(*nref); | |
515 | new((*prefs)[nv]) AliTrackReference(*pref); | |
516 | ||
517 | nv++; | |
ca28c5f5 | 518 | } |
4fa1e629 | 519 | itsRefs->Clear(); |
ca28c5f5 | 520 | |
4fa1e629 | 521 | v0Tree.Fill(); |
522 | nrefs->Clear(); prefs->Clear(); | |
523 | ||
524 | } //**** end of the loop over generated events | |
525 | ||
526 | v0Tree.Write(); | |
527 | v0File->Close(); | |
528 | ||
529 | delete itsTree; | |
530 | itsFile->Close(); | |
531 | ||
532 | delete rl; | |
533 | return 0; | |
ca28c5f5 | 534 | } |