added AliFemto documentation
[u/mrichter/AliRoot.git] / STEER / AliV0Comparison.C
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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"
5102bab6 30 #include "AliESD.h"
ca28c5f5 31#endif
32
4fa1e629 33Int_t GoodV0s(const Char_t *dir=".");
ca28c5f5 34
566abf75 35extern AliRun *gAlice;
4fa1e629 36extern TBenchmark *gBenchmark;
37extern TROOT *gROOT;
566abf75 38
4fa1e629 39static Int_t allgood=0;
40static Int_t allfound=0;
5102bab6 41
4fa1e629 42Int_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 }
8b462fd8 167 AliESD* event = new AliESD;
168 TTree* esdTree = (TTree*) ef->Get("esdTree");
169 if (!esdTree) {
170 ::Error("AliV0Comparison.C", "no ESD tree found");
171 return 6;
172 }
173 esdTree->SetBranchAddress("ESD", &event);
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;
4fa1e629 285 ef->Close();
286
287 delete v0Tree;
288 refFile->Close();
ca28c5f5 289
4fa1e629 290 Stat_t ng=hgood->GetEntries(), nf=hfound->GetEntries();
291 if (ng!=0) cout<<"Integral efficiency is about "<<nf/ng*100.<<" %\n";
292 cout<<"Total number of found V0s: "<<allfound<<" ("<<nf<<" in the peak)\n";
293 cout<<"Total number of \"good\" V0s: "<<allgood<<endl;
ca28c5f5 294
295 gStyle->SetOptStat(111110);
296 gStyle->SetOptFit(1);
297
4fa1e629 298 TCanvas *c1=(TCanvas*)gROOT->FindObject("c1");
299 if (!c1) {
300 c1=new TCanvas("c1","",0,0,580,610);
301 c1->Divide(2,2);
302 }
303
304 Int_t minc=33;
ca28c5f5 305
306 c1->cd(1);
307 gPad->SetFillColor(42); gPad->SetFrameFillColor(10);
4fa1e629 308 if (hp->GetEntries()<minc) hp->Draw(); else hp->Fit("gaus");
ca28c5f5 309 hl->Draw("same"); c1->cd();
310
311 c1->cd(2);
312 gPad->SetFillColor(42); gPad->SetFrameFillColor(10);
4fa1e629 313 if (hpt->GetEntries()<minc) hpt->Draw(); else hpt->Fit("gaus");
314 c1->cd();
ca28c5f5 315
316 c1->cd(3);
317 gPad->SetFillColor(42); gPad->SetFrameFillColor(10);
4fa1e629 318 if (hx->GetEntries()<minc) hx->Draw(); else hx->Fit("gaus");
ca28c5f5 319 hy->Draw("same"); c1->cd();
320
321 c1->cd(4);
322 gPad->SetFillColor(42); gPad->SetFrameFillColor(10);
4fa1e629 323 if (hz->GetEntries()<minc) hz->Draw(); else hz->Fit("gaus");
ca28c5f5 324
4fa1e629 325 c1->Update();
ca28c5f5 326
4fa1e629 327 TCanvas *c2=(TCanvas*)gROOT->FindObject("c2");
328 if (!c2) {
329 c2=new TCanvas("c2","",600,0,580,610);
330 c2->Divide(1,2);
331 }
ca28c5f5 332
333 c2->cd(1);
334 gPad->SetFillColor(42); gPad->SetFrameFillColor(10);
335 hfound->Sumw2(); hgood->Sumw2(); hfake->Sumw2();
336 hg->Divide(hfound,hgood,1,1.,"b");
337 hf->Divide(hfake,hgood,1,1.,"b");
338 hg->SetMaximum(1.4);
339 hg->SetYTitle("V0 reconstruction efficiency");
340 hg->SetXTitle("Pt (GeV/c)");
341 hg->Draw();
342
343 TLine *line1 = new TLine(pmin,1.0,pmax,1.0); line1->SetLineStyle(4);
344 line1->Draw("same");
345 TLine *line2 = new TLine(pmin,0.9,pmax,0.9); line2->SetLineStyle(4);
346 line2->Draw("same");
347
348 hf->SetFillColor(1);
349 hf->SetFillStyle(3013);
350 hf->SetLineColor(2);
351 hf->SetLineWidth(2);
352 hf->Draw("histsame");
353 TText *text = new TText(0.461176,0.248448,"Fake vertices");
354 text->SetTextSize(0.05);
355 text->Draw();
356 text = new TText(0.453919,1.11408,"Good vertices");
357 text->SetTextSize(0.05);
358 text->Draw();
359
360
361 c2->cd(2);
362 gPad->SetFillColor(42); gPad->SetFrameFillColor(10);
4fa1e629 363 if (v0s->GetEntries()<minc) v0s->Draw();
364 else v0s->Fit("gaus","","",V0mass-V0width,V0mass+V0width);
04b2a5f1 365 v0sf->Draw("same");
ca28c5f5 366 Double_t max=v0s->GetMaximum();
367 TLine *line3 = new TLine(V0mass-V0width,0.,V0mass-V0width,max);
368 line3->Draw("same");
369 TLine *line4 = new TLine(V0mass+V0width,0.,V0mass+V0width,max);
370 line4->Draw("same");
371
4fa1e629 372 c2->Update();
373
374 TFile fc("AliV0Comparison.root","RECREATE");
375 c1->Write();
376 c2->Write();
377 fc.Close();
378
379 gBenchmark->Stop("AliV0Comparison");
380 gBenchmark->Show("AliV0Comparison");
ca28c5f5 381
382 return 0;
383}
384
ca28c5f5 385
4fa1e629 386Int_t GoodV0s(const Char_t *dir) {
387 if (gAlice) {
388 delete gAlice->GetRunLoader();
389 delete gAlice;//if everything was OK here it is already NULL
390 gAlice = 0x0;
ca28c5f5 391 }
392
4fa1e629 393 Char_t fname[100];
394 sprintf(fname,"%s/galice.root",dir);
395
396 AliRunLoader *rl = AliRunLoader::Open(fname,"COMPARISON");
5102bab6 397 if (!rl) {
4fa1e629 398 ::Error("GoodTracksITS","Can't start session !");
399 return 1;
ca28c5f5 400 }
5102bab6 401
566abf75 402 rl->LoadgAlice();
403 rl->LoadHeader();
404 rl->LoadKinematics();
4fa1e629 405
406
407 Int_t nev=rl->GetNumberOfEvents();
408 ::Info("GoodV0s","Number of events : %d\n",nev);
409
410 sprintf(fname,"%s/GoodTracksITS.root",dir);
411 TFile *itsFile=TFile::Open(fname);
412 if ((!itsFile)||(!itsFile->IsOpen())) {
413 ::Error("GoodV0s","Can't open the GoodTracksITS.root !");
414 delete rl;
415 return 5;
416 }
417 TClonesArray dum("AliTrackReference",1000), *itsRefs=&dum;
418 TTree *itsTree=(TTree*)itsFile->Get("itsTree");
419 if (!itsTree) {
420 ::Error("GoodV0s","Can't get the ITS reference tree !");
421 delete rl;
422 return 6;
423 }
424 TBranch *itsBranch=itsTree->GetBranch("ITS");
425 if (!itsBranch) {
426 ::Error("GoodV0s","Can't get the ITS reference branch !");
427 delete rl;
428 return 7;
429 }
430 itsBranch->SetAddress(&itsRefs);
431
432
433 sprintf(fname,"%s/GoodV0s.root",dir);
434 TFile *v0File=TFile::Open(fname,"recreate");
435 TClonesArray dummy("AliTrackReference",1000), *nrefs=&dummy;
436 TClonesArray dumm("AliTrackReference",1000), *prefs=&dumm;
437 TTree v0Tree("v0Tree","Tree with info about the reconstructable V0s");
438 v0Tree.Branch("negative",&nrefs);
439 v0Tree.Branch("positive",&prefs);
440
441
442 /*** Some information about the cuts ***/
443 Double_t r2min=0.9*0.9;
444 Double_t r2max=2.9*2.9;
445
446
447
448 //******** Loop over generated events
449 for (Int_t e=0; e<nev; e++) {
450 rl->GetEvent(e); v0File->cd();
451
452 Int_t np = rl->GetHeader()->GetNtrack();
453 cout<<"Event "<<e<<" Number of particles: "<<np<<endl;
454
455 itsTree->GetEvent(e);
456 Int_t nk=itsRefs->GetEntriesFast();
457
458 AliStack *stack=rl->Stack();
459
460 AliTrackReference *nref=0, *pref=0;
461
462 Int_t nv=0;
463 while (np--) {
464 //cerr<<np<<'\r';
465 TParticle *p0=stack->Particle(np);
466
467 /*** only these V0s are "good" ***/
468 Int_t code=p0->GetPdgCode();
469 if (code!=kK0Short)
470 if (code!=kLambda0)
471 if (code!=kLambda0Bar) continue;
472
473 /*** daughter tracks should be "good" ***/
474 Int_t plab=p0->GetFirstDaughter(), nlab=p0->GetLastDaughter();
475 if (nlab==plab) continue;
476 if (nlab<0) continue;
477 if (plab<0) continue;
478 Int_t i;
60f349ea 479 TParticle * part = stack->Particle(plab);
480 if (part) {
481 TParticlePDG * partPDG = part->GetPDG();
482 if (partPDG && partPDG->Charge() < 0.) {
483 i=plab; plab=nlab; nlab=i;
484 }
485 }
4fa1e629 486
487 for (i=0; i<nk; i++) {
488 nref=(AliTrackReference*)itsRefs->UncheckedAt(i);
489 if (nref->Label()==nlab) break;
490 }
491 if (i==nk) continue;
492 for (i=0; i<nk; i++) {
493 pref=(AliTrackReference*)itsRefs->UncheckedAt(i);
494 if (pref->Label()==plab) break;
495 }
496 if (i==nk) continue;
497
498 /*** fiducial volume ***/
499 TParticle *p=stack->Particle(nlab);
500 Double_t x=p->Vx(), y=p->Vy(), z=p->Vz(), r2=x*x+y*y;
501 if (r2<r2min) continue;
502 if (r2>r2max) continue;
ca28c5f5 503
4fa1e629 504 Int_t pdg=p0->GetPdgCode();
505 nref->SetLength(pdg); //This will the V0's PDG !
506
507 new((*nrefs)[nv]) AliTrackReference(*nref);
508 new((*prefs)[nv]) AliTrackReference(*pref);
509
510 nv++;
ca28c5f5 511 }
4fa1e629 512 itsRefs->Clear();
ca28c5f5 513
4fa1e629 514 v0Tree.Fill();
515 nrefs->Clear(); prefs->Clear();
516
517 } //**** end of the loop over generated events
518
519 v0Tree.Write();
520 v0File->Close();
521
522 delete itsTree;
523 itsFile->Close();
524
525 delete rl;
526 return 0;
ca28c5f5 527}