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e43c066c 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
16//-------------------------------------------------------------------------
17// Implementation of the ITS tracker class
15dd636f 18// It reads AliITSclusterV2 clusters and creates AliITStrackMI tracks
e43c066c 19// and fills with them the ESD
15dd636f 20// Origin: Marian Ivanov, CERN, Marian.Ivanov@cern.ch
e43c066c 21// dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
f43e383b 22//
e43c066c 23//-------------------------------------------------------------------------
0703142d 24
25#include <TFile.h>
26#include <TMatrixD.h>
e43c066c 27#include <TTree.h>
0703142d 28
29
e43c066c 30#include "AliESD.h"
0703142d 31#include "AliESDV0MI.h"
32#include "AliHelix.h"
e43c066c 33#include "AliITSclusterV2.h"
0703142d 34#include "AliITSgeom.h"
35#include "AliITSrecoV2.h"
e43c066c 36#include "AliITStrackerMI.h"
f43e383b 37
e43c066c 38
39ClassImp(AliITStrackerMI)
e43c066c 40
41
42
43AliITStrackerMI::AliITSlayer AliITStrackerMI::fgLayers[kMaxLayer]; // ITS layers
44
45AliITStrackerMI::AliITStrackerMI(const AliITSgeom *geom) : AliTracker() {
46 //--------------------------------------------------------------------
47 //This is the AliITStrackerMI constructor
48 //--------------------------------------------------------------------
49 AliITSgeom *g=(AliITSgeom*)geom;
50
51 Float_t x,y,z;
52 Int_t i;
53 for (i=1; i<kMaxLayer+1; i++) {
54 Int_t nlad=g->GetNladders(i);
55 Int_t ndet=g->GetNdetectors(i);
56
57 g->GetTrans(i,1,1,x,y,z);
58 Double_t r=TMath::Sqrt(x*x + y*y);
59 Double_t poff=TMath::ATan2(y,x);
60 Double_t zoff=z;
61
62 g->GetTrans(i,1,2,x,y,z);
63 r += TMath::Sqrt(x*x + y*y);
64 g->GetTrans(i,2,1,x,y,z);
65 r += TMath::Sqrt(x*x + y*y);
66 g->GetTrans(i,2,2,x,y,z);
67 r += TMath::Sqrt(x*x + y*y);
68 r*=0.25;
69
70 new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet);
71
72 for (Int_t j=1; j<nlad+1; j++) {
73 for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors
74 Float_t x,y,zshift; g->GetTrans(i,j,k,x,y,zshift);
75 Double_t rot[9]; g->GetRotMatrix(i,j,k,rot);
76
77 Double_t phi=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
78 phi+=TMath::Pi()/2;
79 if (i==1) phi+=TMath::Pi();
80 Double_t cp=TMath::Cos(phi), sp=TMath::Sin(phi);
81 Double_t r=x*cp+y*sp;
82
83 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
84 new(&det) AliITSdetector(r,phi);
85 }
86 }
87
88 }
89
90 fI=kMaxLayer;
91
92 fPass=0;
93 fConstraint[0]=1; fConstraint[1]=0;
94
95 Double_t xyz[]={kXV,kYV,kZV}, ers[]={kSigmaXV,kSigmaYV,kSigmaZV};
96 SetVertex(xyz,ers);
97
98 for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=kLayersNotToSkip[i];
99 fLastLayerToTrackTo=kLastLayerToTrackTo;
100
101}
102
103void AliITStrackerMI::SetLayersNotToSkip(Int_t *l) {
104 //--------------------------------------------------------------------
105 //This function set masks of the layers which must be not skipped
106 //--------------------------------------------------------------------
107 for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=l[i];
108}
109
110Int_t AliITStrackerMI::LoadClusters(TTree *cTree) {
111 //--------------------------------------------------------------------
112 //This function loads ITS clusters
113 //--------------------------------------------------------------------
114 TBranch *branch=cTree->GetBranch("Clusters");
115 if (!branch) {
116 Error("LoadClusters"," can't get the branch !\n");
117 return 1;
118 }
119
120 TClonesArray dummy("AliITSclusterV2",10000), *clusters=&dummy;
121 branch->SetAddress(&clusters);
122
123 Int_t j=0;
124 Int_t detector=0;
125 for (Int_t i=0; i<kMaxLayer; i++) {
126 Int_t ndet=fgLayers[i].GetNdetectors();
127 Int_t jmax = j + fgLayers[i].GetNladders()*ndet;
128 for (; j<jmax; j++) {
129 if (!cTree->GetEvent(j)) continue;
130 Int_t ncl=clusters->GetEntriesFast();
131 SignDeltas(clusters,GetZ());
132 while (ncl--) {
133 AliITSclusterV2 *c=(AliITSclusterV2*)clusters->UncheckedAt(ncl);
134 detector = c->GetDetectorIndex();
135 fgLayers[i].InsertCluster(new AliITSclusterV2(*c));
136 }
137 clusters->Delete();
138 //add dead zone virtual "cluster"
139 if (i<2){
140 for (Float_t ydead = 0; ydead < 1.31 ; ydead+=(i+1.)*0.018){
141 Int_t lab[4] = {0,0,0,detector};
142 Int_t info[3] = {0,0,0};
143 Float_t hit[5]={0,0,0.004/12.,0.001/12.,0};
144 if (i==0) hit[0] =ydead-0.4;
145 if (i==1) hit[0]=ydead-3.75;
146 hit[1] =-0.04;
147 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
148 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
149 hit[1]=-7.05;
150 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
151 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
152 hit[1]=-7.15;
153 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
154 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
155 hit[1] =0.06;
156 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
157 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
158 hit[1]=7.05;
159 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
160 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
161 hit[1]=7.25;
162 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
163 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
164 }
165 }
166
167 }
168 //
169 fgLayers[i].ResetRoad(); //road defined by the cluster density
170 fgLayers[i].SortClusters();
171 }
172
173 return 0;
174}
175
176void AliITStrackerMI::UnloadClusters() {
177 //--------------------------------------------------------------------
178 //This function unloads ITS clusters
179 //--------------------------------------------------------------------
180 for (Int_t i=0; i<kMaxLayer; i++) fgLayers[i].ResetClusters();
181}
182
15dd636f 183static Int_t CorrectForDeadZoneMaterial(AliITStrackMI *t) {
e43c066c 184 //--------------------------------------------------------------------
185 // Correction for the material between the TPC and the ITS
186 // (should it belong to the TPC code ?)
187 //--------------------------------------------------------------------
188 Double_t riw=80., diw=0.0053, x0iw=30; // TPC inner wall ?
189 Double_t rcd=61., dcd=0.0053, x0cd=30; // TPC "central drum" ?
190 Double_t yr=12.8, dr=0.03; // rods ?
191 Double_t zm=0.2, dm=0.40; // membrane
192 //Double_t rr=52., dr=0.19, x0r=24., yyr=7.77; //rails
193 Double_t rs=50., ds=0.001; // something belonging to the ITS (screen ?)
194
195 if (t->GetX() > riw) {
196 if (!t->PropagateTo(riw,diw,x0iw)) return 1;
197 if (TMath::Abs(t->GetY())>yr) t->CorrectForMaterial(dr);
198 if (TMath::Abs(t->GetZ())<zm) t->CorrectForMaterial(dm);
199 if (!t->PropagateTo(rcd,dcd,x0cd)) return 1;
200 //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z);
201 //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,dr,x0r);
202 if (!t->PropagateTo(rs,ds)) return 1;
203 } else if (t->GetX() < rs) {
204 if (!t->PropagateTo(rs,-ds)) return 1;
205 //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z);
206 //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,-dr,x0r);
207 if (!t->PropagateTo(rcd,-dcd,x0cd)) return 1;
208 if (!t->PropagateTo(riw+0.001,-diw,x0iw)) return 1;
209 } else {
210 ::Error("CorrectForDeadZoneMaterial","track is already in the dead zone !");
211 return 1;
212 }
213
214 return 0;
215}
216
217Int_t AliITStrackerMI::Clusters2Tracks(AliESD *event) {
218 //--------------------------------------------------------------------
219 // This functions reconstructs ITS tracks
220 // The clusters must be already loaded !
221 //--------------------------------------------------------------------
222 TObjArray itsTracks(15000);
223
224 {/* Read ESD tracks */
225 Int_t nentr=event->GetNumberOfTracks();
226 Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr);
227 while (nentr--) {
228 AliESDtrack *esd=event->GetTrack(nentr);
229
230 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue;
231 if (esd->GetStatus()&AliESDtrack::kTPCout) continue;
232 if (esd->GetStatus()&AliESDtrack::kITSin) continue;
51ad6848 233 if (esd->GetKinkIndex(0)>0) continue; //kink daughter
15dd636f 234 AliITStrackMI *t=0;
e43c066c 235 try {
15dd636f 236 t=new AliITStrackMI(*esd);
e43c066c 237 } catch (const Char_t *msg) {
238 Warning("Clusters2Tracks",msg);
239 delete t;
240 continue;
241 }
242 t->fD[0] = t->GetD(GetX(),GetY());
243 t->fD[1] = t->GetZat(GetX())-GetZ();
244 Double_t vdist = TMath::Sqrt(t->fD[0]*t->fD[0]+t->fD[1]*t->fD[1]);
245 if (t->GetMass()<0.13) t->SetMass(0.13957); // MI look to the esd - mass hypothesys !!!!!!!!!!!
246 // write expected q
247 t->fExpQ = TMath::Max(0.8*t->fESDtrack->GetTPCsignal(),30.);
248
249 if (TMath::Abs(t->fD[0])>10) {
250 delete t;
251 continue;
252 }
253
254 if (TMath::Abs(vdist)>20) {
255 delete t;
256 continue;
257 }
258 if (TMath::Abs(1/t->Get1Pt())<0.120) {
259 delete t;
260 continue;
261 }
262
263 if (CorrectForDeadZoneMaterial(t)!=0) {
264 Warning("Clusters2Tracks",
265 "failed to correct for the material in the dead zone !\n");
266 delete t;
267 continue;
268 }
269 t->fReconstructed = kFALSE;
270 itsTracks.AddLast(t);
271 }
272 } /* End Read ESD tracks */
273
274 itsTracks.Sort();
275 Int_t nentr=itsTracks.GetEntriesFast();
276 fTrackHypothesys.Expand(nentr);
277 MakeCoeficients(nentr);
278 Int_t ntrk=0;
279 for (fPass=0; fPass<2; fPass++) {
280 Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
281 for (Int_t i=0; i<nentr; i++) {
4c53440c 282// cerr<<fPass<<" "<<i<<'\r';
e43c066c 283 fCurrentEsdTrack = i;
15dd636f 284 AliITStrackMI *t=(AliITStrackMI*)itsTracks.UncheckedAt(i);
e43c066c 285 if (t==0) continue; //this track has been already tracked
286 if (t->fReconstructed&&(t->fNUsed<1.5)) continue; //this track was already "succesfully" reconstructed
287 if ( (TMath::Abs(t->GetD(GetX(),GetY())) >3.) && fConstraint[fPass]) continue;
288 if ( (TMath::Abs(t->GetZat(GetX())-GetZ())>3.) && fConstraint[fPass]) continue;
289
290 Int_t tpcLabel=t->GetLabel(); //save the TPC track label
291 fI = 6;
292 ResetTrackToFollow(*t);
293 ResetBestTrack();
294
295 FollowProlongationTree(t,i);
296
297
298 SortTrackHypothesys(fCurrentEsdTrack,20,0); //MI change
299 //
15dd636f 300 AliITStrackMI * besttrack = GetBestHypothesys(fCurrentEsdTrack,t,15);
e43c066c 301 if (!besttrack) continue;
302 besttrack->SetLabel(tpcLabel);
303 // besttrack->CookdEdx();
304 CookdEdx(besttrack);
305 besttrack->fFakeRatio=1.;
306 CookLabel(besttrack,0.); //For comparison only
307 // besttrack->UpdateESDtrack(AliESDtrack::kITSin);
308 //
309
310 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
311
312 if ( besttrack->GetNumberOfClusters()<5 && fConstraint[fPass]) {
313 continue;
314 }
315 if (besttrack->fChi2MIP[0]+besttrack->fNUsed>3.5) continue;
316 if ( (TMath::Abs(besttrack->fD[0]*besttrack->fD[0]+besttrack->fD[1]*besttrack->fD[1])>0.1) && fConstraint[fPass]) continue;
317 //delete itsTracks.RemoveAt(i);
318 t->fReconstructed = kTRUE;
319 ntrk++;
320 }
321 GetBestHypothesysMIP(itsTracks);
322 }
323
324 //GetBestHypothesysMIP(itsTracks);
51ad6848 325 FindV0(event);
e43c066c 326
327 itsTracks.Delete();
328 //
329 Int_t entries = fTrackHypothesys.GetEntriesFast();
330 for (Int_t ientry=0;ientry<entries;ientry++){
331 TObjArray * array =(TObjArray*)fTrackHypothesys.UncheckedAt(ientry);
332 if (array) array->Delete();
333 delete fTrackHypothesys.RemoveAt(ientry);
334 }
335
336 fTrackHypothesys.Delete();
337 Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk);
338
339 return 0;
340}
341
342
e43c066c 343Int_t AliITStrackerMI::PropagateBack(AliESD *event) {
344 //--------------------------------------------------------------------
345 // This functions propagates reconstructed ITS tracks back
346 // The clusters must be loaded !
347 //--------------------------------------------------------------------
348 Int_t nentr=event->GetNumberOfTracks();
349 Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
350
351 Int_t ntrk=0;
352 for (Int_t i=0; i<nentr; i++) {
353 AliESDtrack *esd=event->GetTrack(i);
354
355 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
356 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
357
15dd636f 358 AliITStrackMI *t=0;
e43c066c 359 try {
15dd636f 360 t=new AliITStrackMI(*esd);
e43c066c 361 } catch (const Char_t *msg) {
362 Warning("PropagateBack",msg);
363 delete t;
364 continue;
365 }
366 t->fExpQ = TMath::Max(0.8*t->fESDtrack->GetTPCsignal(),30.);
367
368 ResetTrackToFollow(*t);
369
370 // propagete to vertex [SR, GSI 17.02.2003]
371 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
372 if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {
373 if (fTrackToFollow.PropagateToVertex()) {
374 fTrackToFollow.StartTimeIntegral();
375 }
376 fTrackToFollow.PropagateTo(3.,-0.0028,65.19);
377 }
378
379 fTrackToFollow.ResetCovariance(); fTrackToFollow.ResetClusters();
380 if (RefitAt(49.,&fTrackToFollow,t)) {
381 if (CorrectForDeadZoneMaterial(&fTrackToFollow)!=0) {
382 Warning("PropagateBack",
383 "failed to correct for the material in the dead zone !\n");
384 delete t;
385 continue;
386 }
387 fTrackToFollow.SetLabel(t->GetLabel());
388 //fTrackToFollow.CookdEdx();
389 CookLabel(&fTrackToFollow,0.); //For comparison only
390 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
391 //UseClusters(&fTrackToFollow);
392 ntrk++;
393 }
394 delete t;
395 }
396
397 Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk);
398
399 return 0;
400}
401
402Int_t AliITStrackerMI::RefitInward(AliESD *event) {
403 //--------------------------------------------------------------------
404 // This functions refits ITS tracks using the
405 // "inward propagated" TPC tracks
406 // The clusters must be loaded !
407 //--------------------------------------------------------------------
408 Int_t nentr=event->GetNumberOfTracks();
409 Info("RefitInward", "Number of ESD tracks: %d\n", nentr);
410
411 Int_t ntrk=0;
412 for (Int_t i=0; i<nentr; i++) {
413 AliESDtrack *esd=event->GetTrack(i);
414
415 if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
416 if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
417 if (esd->GetStatus()&AliESDtrack::kTPCout)
418 if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
419
15dd636f 420 AliITStrackMI *t=0;
e43c066c 421 try {
15dd636f 422 t=new AliITStrackMI(*esd);
e43c066c 423 } catch (const Char_t *msg) {
424 Warning("RefitInward",msg);
425 delete t;
426 continue;
427 }
428 t->fExpQ = TMath::Max(0.8*t->fESDtrack->GetTPCsignal(),30.);
429 if (CorrectForDeadZoneMaterial(t)!=0) {
430 Warning("RefitInward",
431 "failed to correct for the material in the dead zone !\n");
432 delete t;
433 continue;
434 }
435
436 ResetTrackToFollow(*t);
437 fTrackToFollow.ResetClusters();
438
439 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
440 fTrackToFollow.ResetCovariance();
441
442 //Refitting...
443 if (RefitAt(3.7, &fTrackToFollow, t)) {
444 fTrackToFollow.SetLabel(t->GetLabel());
445 // fTrackToFollow.CookdEdx();
446 CookdEdx(&fTrackToFollow);
447
448 CookLabel(&fTrackToFollow,0.0); //For comparison only
449
450 if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {//The beam pipe
451 Double_t a=fTrackToFollow.GetAlpha();
452 Double_t cs=TMath::Cos(a),sn=TMath::Sin(a);
453 Double_t xv= GetX()*cs + GetY()*sn;
454 Double_t yv=-GetX()*sn + GetY()*cs;
455
456 Double_t c=fTrackToFollow.GetC(), snp=fTrackToFollow.GetSnp();
457 Double_t x=fTrackToFollow.GetX(), y=fTrackToFollow.GetY();
458 Double_t tgfv=-(c*(x-xv)-snp)/(c*(y-yv) + TMath::Sqrt(1.-snp*snp));
459 Double_t fv=TMath::ATan(tgfv);
460
461 cs=TMath::Cos(fv); sn=TMath::Sin(fv);
462 x = xv*cs + yv*sn;
463 yv=-xv*sn + yv*cs; xv=x;
464
465 if (fTrackToFollow.Propagate(fv+a,xv)) {
466 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit);
399fb957 467 Float_t d=fTrackToFollow.GetD(GetX(),GetY());
468 Float_t z=fTrackToFollow.GetZ()-GetZ();
469 fTrackToFollow.GetESDtrack()->SetImpactParameters(d,z);
e43c066c 470 //UseClusters(&fTrackToFollow);
471 {
472 AliITSclusterV2 c; c.SetY(yv); c.SetZ(GetZ());
473 c.SetSigmaY2(GetSigmaY()*GetSigmaY());
474 c.SetSigmaZ2(GetSigmaZ()*GetSigmaZ());
475 Double_t chi2=fTrackToFollow.GetPredictedChi2(&c);
476 //Double_t chi2=GetPredictedChi2MI(&fTrackToFollow,&c,fI);
477 if (chi2<kMaxChi2)
478 if (fTrackToFollow.Update(&c,-chi2,0))
479 //if (UpdateMI(&fTrackToFollow,&c,-chi2,0))
480 fTrackToFollow.SetConstrainedESDtrack(chi2);
481 }
482 ntrk++;
483 }
484 }
485 }
486 delete t;
487 }
488
489 Info("RefitInward","Number of refitted tracks: %d\n",ntrk);
490
491 return 0;
492}
493
494AliCluster *AliITStrackerMI::GetCluster(Int_t index) const {
495 //--------------------------------------------------------------------
496 // Return pointer to a given cluster
497 //--------------------------------------------------------------------
498 Int_t l=(index & 0xf0000000) >> 28;
499 Int_t c=(index & 0x0fffffff) >> 00;
500 return fgLayers[l].GetCluster(c);
501}
502
503
15dd636f 504void AliITStrackerMI::FollowProlongationTree(AliITStrackMI * otrack, Int_t esdindex)
e43c066c 505{
506 //--------------------------------------------------------------------
507 // Follow prolongation tree
508 //--------------------------------------------------------------------
509
510 //setup tree of the prolongations
511 //
15dd636f 512 static AliITStrackMI tracks[7][100];
513 AliITStrackMI *currenttrack;
514 static AliITStrackMI currenttrack1;
515 static AliITStrackMI currenttrack2;
516 static AliITStrackMI backuptrack;
e43c066c 517 Int_t ntracks[7];
518 Int_t nindexes[7][100];
519 Float_t normalizedchi2[100];
520 for (Int_t ilayer=0;ilayer<6;ilayer++) ntracks[ilayer]=0;
521 otrack->fNSkipped=0;
15dd636f 522 new (&(tracks[6][0])) AliITStrackMI(*otrack);
e43c066c 523 ntracks[6]=1;
524 nindexes[6][0]=0;
525 //
526 //
527 // follow prolongations
528 for (Int_t ilayer=5;ilayer>=0;ilayer--){
529 //
530 AliITSlayer &layer=fgLayers[ilayer];
531 Double_t r=layer.GetR();
532 ntracks[ilayer]=0;
533 //
534 //
535 Int_t nskipped=0;
536 Float_t nused =0;
537 for (Int_t itrack =0;itrack<ntracks[ilayer+1];itrack++){
538 //set current track
539 if (ntracks[ilayer]>=100) break;
540 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].fNSkipped>0) nskipped++;
541 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].fNUsed>2.) nused++;
542 if (ntracks[ilayer]>15+ilayer){
543 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].fNSkipped>0 && nskipped>4+ilayer) continue;
544 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].fNUsed>2. && nused>3) continue;
545 }
546
15dd636f 547 new(&currenttrack1) AliITStrackMI(tracks[ilayer+1][nindexes[ilayer+1][itrack]]);
e43c066c 548 if (ilayer==3 || ilayer==1) {
549 Double_t rs=0.5*(fgLayers[ilayer+1].GetR() + r);
550 Double_t d=0.0034, x0=38.6;
551 if (ilayer==1) {rs=9.; d=0.0097; x0=42;}
552 if (!currenttrack1.PropagateTo(rs,d,x0)) {
553 continue;
554 }
555 }
556 //
557 //find intersection with layer
558 Double_t x,y,z;
559 if (!currenttrack1.GetGlobalXYZat(r,x,y,z)) {
560 continue;
561 }
562 Double_t phi=TMath::ATan2(y,x);
563 Int_t idet=layer.FindDetectorIndex(phi,z);
564 if (idet<0) {
565 continue;
566 }
567 //propagate to the intersection
568 const AliITSdetector &det=layer.GetDetector(idet);
569 phi=det.GetPhi();
15dd636f 570 new(&currenttrack2) AliITStrackMI(currenttrack1);
e43c066c 571 if (!currenttrack1.Propagate(phi,det.GetR())) {
572 continue;
573 }
574 currenttrack2.Propagate(phi,det.GetR()); //
575 currenttrack1.SetDetectorIndex(idet);
576 currenttrack2.SetDetectorIndex(idet);
577
578 //
579 //
580 Double_t dz=7.5*TMath::Sqrt(currenttrack1.GetSigmaZ2() + 16.*kSigmaZ2[ilayer]);
581 Double_t dy=7.5*TMath::Sqrt(currenttrack1.GetSigmaY2() + 16.*kSigmaY2[ilayer]);
582 //
583 Bool_t isBoundary=kFALSE;
584 if (currenttrack1.GetY()-dy< det.GetYmin()+0.2) isBoundary = kTRUE;
585 if (currenttrack1.GetY()+dy> det.GetYmax()-0.2) isBoundary = kTRUE;
586 if (currenttrack1.GetZ()-dz< det.GetZmin()+0.2) isBoundary = kTRUE;
587 if (currenttrack1.GetZ()+dz> det.GetZmax()-0.2) isBoundary = kTRUE;
588
589 if (isBoundary){ // track at boundary between detectors
590 Float_t maxtgl = TMath::Abs(currenttrack1.GetTgl());
591 if (maxtgl>1) maxtgl=1;
592 dz = TMath::Sqrt(dz*dz+0.25*maxtgl*maxtgl);
593 //
594 Float_t maxsnp = TMath::Abs(currenttrack1.GetSnp());
595 if (maxsnp>0.95) continue;
596 //if (maxsnp>0.5) maxsnp=0.5;
597 dy=TMath::Sqrt(dy*dy+0.25*maxsnp*maxsnp);
598 }
599
600 Double_t zmin=currenttrack1.GetZ() - dz;
601 Double_t zmax=currenttrack1.GetZ() + dz;
602 Double_t ymin=currenttrack1.GetY() + r*phi - dy;
603 Double_t ymax=currenttrack1.GetY() + r*phi + dy;
604 layer.SelectClusters(zmin,zmax,ymin,ymax);
605 //
606 // loop over all possible prolongations
607 //
608 Double_t msz=1./((currenttrack1.GetSigmaZ2() + 16.*kSigmaZ2[ilayer]));
609 Double_t msy=1./((currenttrack1.GetSigmaY2() + 16.*kSigmaY2[ilayer]));
610 if (fConstraint[fPass]){
611 msy/=60; msz/=60.;
612 }
613 else{
614 msy/=50; msz/=50.;
615 }
616 //
617 const AliITSclusterV2 *c=0; Int_t ci=-1;
618 Double_t chi2=12345.;
619 Int_t deadzone=0;
620 currenttrack = &currenttrack1;
621 while ((c=layer.GetNextCluster(ci))!=0) {
622 if (ntracks[ilayer]>95) break; //space for skipped clusters
623 Bool_t change =kFALSE;
624 if (c->GetQ()==0 && (deadzone==1)) continue;
625 Int_t idet=c->GetDetectorIndex();
626 if (currenttrack->GetDetectorIndex()!=idet) {
627 const AliITSdetector &det=layer.GetDetector(idet);
628 Double_t y,z;
629 if (!currenttrack2.GetProlongationFast(det.GetPhi(),det.GetR(),y,z)) continue;
630 Float_t pz = (z - c->GetZ()) , py=(y - c->GetY());
631 if (pz*pz*msz+py*py*msy>1.) continue;
632 //
15dd636f 633 new (&backuptrack) AliITStrackMI(currenttrack2);
e43c066c 634 change = kTRUE;
635 currenttrack =&currenttrack2;
636 if (!currenttrack->Propagate(det.GetPhi(),det.GetR())) {
15dd636f 637 new (currenttrack) AliITStrackMI(backuptrack);
e43c066c 638 change = kFALSE;
639 continue;
640 }
641 currenttrack->SetDetectorIndex(idet);
642 }
643 else{
644 Float_t pz = (currenttrack->GetZ() - c->GetZ()) , py=(currenttrack->GetY() - c->GetY());
645 if (pz*pz*msz+py*py*msy>1.) continue;
646 }
647
648 chi2=GetPredictedChi2MI(currenttrack,c,ilayer);
649 if (chi2<kMaxChi2s[ilayer]){
650 if (c->GetQ()==0) deadzone=1; // take dead zone only once
651 if (ntracks[ilayer]>=100) continue;
15dd636f 652 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
e43c066c 653 updatetrack->fClIndex[ilayer]=0;
654 if (change){
15dd636f 655 new (&currenttrack2) AliITStrackMI(backuptrack);
e43c066c 656 }
657 if (c->GetQ()!=0){
658 if (!UpdateMI(updatetrack,c,chi2,(ilayer<<28)+ci)) continue;
659 updatetrack->SetSampledEdx(c->GetQ(),updatetrack->GetNumberOfClusters()-1); //b.b.
660 }
661 else {
662 updatetrack->fNDeadZone++;
663 updatetrack->fDeadZoneProbability=GetDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2()));
664 }
665 if (c->IsUsed()){
666 updatetrack->fNUsed++;
667 }
668 Double_t x0;
669 Double_t d=layer.GetThickness(updatetrack->GetY(),updatetrack->GetZ(),x0);
670 updatetrack->CorrectForMaterial(d,x0);
671 if (fConstraint[fPass]) {
672 updatetrack->fConstrain = fConstraint[fPass];
673 fI = ilayer;
674 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
675 Double_t xyz[]={GetX(),GetY(),GetZ()};
676 Double_t ptfactor = 1;
677 Double_t ers[]={GetSigmaX()*ptfactor,GetSigmaY()*ptfactor,GetSigmaZ()};
678 Bool_t isPrim = kTRUE;
679 if (ilayer<4){
680 updatetrack->fD[0] = updatetrack->GetD(GetX(),GetY());
681 updatetrack->fD[1] = updatetrack->GetZat(GetX())-GetZ();
682 if ( TMath::Abs(updatetrack->fD[0]/(1.+ilayer))>0.4 || TMath::Abs(updatetrack->fD[1]/(1.+ilayer))>0.4) isPrim=kFALSE;
683 }
684 if (isPrim) updatetrack->Improve(d,xyz,ers);
685 } //apply vertex constrain
686 ntracks[ilayer]++;
687 } // create new hypothesy
688 } // loop over possible cluster prolongation
689 // if (fConstraint[fPass]&&itrack<2&&currenttrack1.fNSkipped==0 && deadzone==0){
690 if (itrack<2&&currenttrack1.fNSkipped==0 && deadzone==0&&ntracks[ilayer]<100){
15dd636f 691 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
e43c066c 692 vtrack->fClIndex[ilayer]=0;
693 fI = ilayer;
694 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
695 Double_t xyz[]={GetX(),GetY(),GetZ()};
696 Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
697 vtrack->Improve(d,xyz,ers);
698 vtrack->fNSkipped++;
699 ntracks[ilayer]++;
700 }
701
702 } //loop over track candidates
703 //
704 //
705 Int_t accepted=0;
706
707 Int_t golds=0;
708 for (Int_t itrack=0;itrack<ntracks[ilayer];itrack++){
709 normalizedchi2[itrack] = NormalizedChi2(&tracks[ilayer][itrack],ilayer);
710 if ( normalizedchi2[itrack]<3+0.5*ilayer) golds++;
711 if (ilayer>4) accepted++;
712 else{
713 if ( fConstraint[fPass] && normalizedchi2[itrack]<kMaxNormChi2C[ilayer]+1) accepted++;
714 if (!fConstraint[fPass] && normalizedchi2[itrack]<kMaxNormChi2NonC[ilayer]+1) accepted++;
715 }
716 }
717 TMath::Sort(ntracks[ilayer],normalizedchi2,nindexes[ilayer],kFALSE);
718 ntracks[ilayer] = TMath::Min(accepted,7+2*ilayer);
719 if (ntracks[ilayer]<golds+2+ilayer) ntracks[ilayer]=TMath::Min(golds+2+ilayer,accepted);
720 if (ntracks[ilayer]>90) ntracks[ilayer]=90;
721 } //loop over layers
722 //printf("%d\t%d\t%d\t%d\t%d\t%d\n",ntracks[0],ntracks[1],ntracks[2],ntracks[3],ntracks[4],ntracks[5]);
723
724 for (Int_t i=0;i<TMath::Min(20,ntracks[0]);i++) {
15dd636f 725 AliITStrackMI & track= tracks[0][nindexes[0][i]];
e43c066c 726 if (!fConstraint[fPass]&&track.fNormChi2[0]>7.)continue;
15dd636f 727 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
e43c066c 728 }
729 for (Int_t i=0;i<TMath::Min(4,ntracks[1]);i++) {
15dd636f 730 AliITStrackMI & track= tracks[1][nindexes[1][i]];
e43c066c 731 if (track.GetNumberOfClusters()<4) continue;
732 if (!fConstraint[fPass]&&track.fNormChi2[1]>7.)continue;
733 if (fConstraint[fPass]) track.fNSkipped+=1;
734 if (!fConstraint[fPass]) {
735 track.fD[0] = track.GetD(GetX(),GetY());
4c53440c 736 track.fNSkipped+=4./(4.+8.*TMath::Abs(track.fD[0]));
e43c066c 737 if (track.fN+track.fNDeadZone+track.fNSkipped>6) {
738 track.fNSkipped = 6-track.fN+track.fNDeadZone;
739 }
740 }
15dd636f 741 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
e43c066c 742 }
743 //}
744
745 if (!fConstraint[fPass]){
746 for (Int_t i=0;i<TMath::Min(3,ntracks[2]);i++) {
15dd636f 747 AliITStrackMI & track= tracks[2][nindexes[2][i]];
e43c066c 748 if (track.GetNumberOfClusters()<4) continue;
749 if (!fConstraint[fPass]&&track.fNormChi2[2]>7.)continue;
750 if (fConstraint[fPass]) track.fNSkipped+=2;
751 if (!fConstraint[fPass]){
752 track.fD[0] = track.GetD(GetX(),GetY());
4c53440c 753 track.fNSkipped+= 7./(7.+8.*TMath::Abs(track.fD[0]));
e43c066c 754 if (track.fN+track.fNDeadZone+track.fNSkipped>6) {
755 track.fNSkipped = 6-track.fN+track.fNDeadZone;
756 }
757 }
15dd636f 758 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
e43c066c 759 }
760 }
761}
762
763
764AliITStrackerMI::AliITSlayer & AliITStrackerMI::GetLayer(Int_t layer) const
765{
766 //--------------------------------------------------------------------
767 //
768 //
769 return fgLayers[layer];
770}
771AliITStrackerMI::AliITSlayer::AliITSlayer() {
772 //--------------------------------------------------------------------
773 //default AliITSlayer constructor
774 //--------------------------------------------------------------------
775 fN=0;
776 fDetectors=0;
777 fSkip = 0;
778 fCurrentSlice=-1;
779 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
780 fClusterWeight[i]=0;
781 fClusterTracks[0][i]=-1;
782 fClusterTracks[1][i]=-1;
783 fClusterTracks[2][i]=-1;
784 fClusterTracks[3][i]=-1;
785 }
786}
787
788AliITStrackerMI::AliITSlayer::
789AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd) {
790 //--------------------------------------------------------------------
791 //main AliITSlayer constructor
792 //--------------------------------------------------------------------
793 fR=r; fPhiOffset=p; fZOffset=z;
794 fNladders=nl; fNdetectors=nd;
795 fDetectors=new AliITSdetector[fNladders*fNdetectors];
796
797 fN=0;
798 fI=0;
799 fSkip = 0;
800 fRoad=2*fR*TMath::Sqrt(3.14/1.);//assuming that there's only one cluster
801}
802
803AliITStrackerMI::AliITSlayer::~AliITSlayer() {
804 //--------------------------------------------------------------------
805 // AliITSlayer destructor
806 //--------------------------------------------------------------------
807 delete[] fDetectors;
808 for (Int_t i=0; i<fN; i++) delete fClusters[i];
809 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
810 fClusterWeight[i]=0;
811 fClusterTracks[0][i]=-1;
812 fClusterTracks[1][i]=-1;
813 fClusterTracks[2][i]=-1;
814 fClusterTracks[3][i]=-1;
815 }
816}
817
818void AliITStrackerMI::AliITSlayer::ResetClusters() {
819 //--------------------------------------------------------------------
820 // This function removes loaded clusters
821 //--------------------------------------------------------------------
822 for (Int_t i=0; i<fN; i++) delete fClusters[i];
823 for (Int_t i=0; i<kMaxClusterPerLayer;i++){
824 fClusterWeight[i]=0;
825 fClusterTracks[0][i]=-1;
826 fClusterTracks[1][i]=-1;
827 fClusterTracks[2][i]=-1;
828 fClusterTracks[3][i]=-1;
829 }
830
831 fN=0;
832 fI=0;
833}
834
835void AliITStrackerMI::AliITSlayer::ResetWeights() {
836 //--------------------------------------------------------------------
837 // This function reset weights of the clusters
838 //--------------------------------------------------------------------
839 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
840 fClusterWeight[i]=0;
841 fClusterTracks[0][i]=-1;
842 fClusterTracks[1][i]=-1;
843 fClusterTracks[2][i]=-1;
844 fClusterTracks[3][i]=-1;
845 }
846 for (Int_t i=0; i<fN;i++) {
847 AliITSclusterV2 * cl = (AliITSclusterV2*)GetCluster(i);
848 if (cl&&cl->IsUsed()) cl->Use();
849 }
850
851}
852
853void AliITStrackerMI::AliITSlayer::ResetRoad() {
854 //--------------------------------------------------------------------
855 // This function calculates the road defined by the cluster density
856 //--------------------------------------------------------------------
857 Int_t n=0;
858 for (Int_t i=0; i<fN; i++) {
859 if (TMath::Abs(fClusters[i]->GetZ())<fR) n++;
860 }
861 //if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n);
862 if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n);
863}
864
865Int_t AliITStrackerMI::AliITSlayer::InsertCluster(AliITSclusterV2 *c) {
866 //--------------------------------------------------------------------
867 //This function adds a cluster to this layer
868 //--------------------------------------------------------------------
869 if (fN==kMaxClusterPerLayer) {
870 ::Error("InsertCluster","Too many clusters !\n");
871 return 1;
872 }
873 fCurrentSlice=-1;
874 if (fN==0) {fClusters[fN++]=c; return 0;}
875 Int_t i=FindClusterIndex(c->GetZ());
876 memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliITSclusterV2*));
877 memmove(fY+i+1 ,fY+i,(fN-i)*sizeof(Float_t));
878 memmove(fZ+i+1 ,fZ+i,(fN-i)*sizeof(Float_t));
879 fClusters[i]=c; fN++;
880 //
881 AliITSdetector &det=GetDetector(c->GetDetectorIndex());
882 Double_t y=fR*det.GetPhi() + c->GetY();
883 if (y>2.*fR*TMath::Pi()) y -= 2.*fR*TMath::Pi();
884 fY[i] = y;
885 fZ[i] = c->GetZ();
886 if (c->GetY()<det.GetYmin()) det.SetYmin(c->GetY());
887 if (c->GetY()>det.GetYmax()) det.SetYmax(c->GetY());
888 if (c->GetZ()<det.GetZmin()) det.SetZmin(c->GetZ());
889 if (c->GetZ()>det.GetZmax()) det.SetZmax(c->GetZ());
890
891 return 0;
892}
893
894void AliITStrackerMI::AliITSlayer::SortClusters()
895{
896 //
897 //sort clusters
898 //
899 fYB[0]=10000000;
900 fYB[1]=-10000000;
901 for (Int_t i=0;i<fN;i++){
902 if (fY[i]<fYB[0]) fYB[0]=fY[i];
903 if (fY[i]>fYB[1]) fYB[1]=fY[i];
904 fClusterIndex[i] = i;
905 }
906 //
907 // fill slices
908 fDy5 = (fYB[1]-fYB[0])/5.;
909 fDy10 = (fYB[1]-fYB[0])/10.;
910 fDy20 = (fYB[1]-fYB[0])/20.;
911 for (Int_t i=0;i<6;i++) fN5[i] =0;
912 for (Int_t i=0;i<11;i++) fN10[i]=0;
913 for (Int_t i=0;i<21;i++) fN20[i]=0;
914 //
915 for (Int_t i=0;i<6;i++) {fBy5[i][0] = fYB[0]+(i-0.75)*fDy5; fBy5[i][1] = fYB[0]+(i+0.75)*fDy5;}
916 for (Int_t i=0;i<11;i++) {fBy10[i][0] = fYB[0]+(i-0.75)*fDy10; fBy10[i][1] = fYB[0]+(i+0.75)*fDy10;}
917 for (Int_t i=0;i<21;i++) {fBy20[i][0] = fYB[0]+(i-0.75)*fDy20; fBy20[i][1] = fYB[0]+(i+0.75)*fDy20;}
918 //
919 //
920 for (Int_t i=0;i<fN;i++) for (Int_t irot=-1;irot<=1;irot++){
921 Float_t curY = fY[i]+irot*2.*TMath::Pi()*fR;
922 if (curY<fYB[0]-fDy5) continue;
923 if (curY>fYB[1]+fDy5) continue;
924 //
925 // slice 10
db3f8691 926 if (TMath::Abs(fYB[1]-fYB[0])<=0) continue;
e43c066c 927 Float_t fslice = TMath::Nint(10.*(curY-fYB[0])/(fYB[1]-fYB[0]));
928 Float_t ymiddle = fYB[0]+fslice*fDy10;
929 for (Int_t di =-1;di<=1;di++){
930 if (TMath::Abs(curY-(ymiddle+(float)di*fDy10))<0.75*fDy10){
931 //
932 Int_t slice = int(fslice+21.0001)-21+di;
933 if (slice<0) continue;
934 if (slice>10) continue;
2a03f170 935 if (fN10[slice]>=kMaxClusterPerLayer10) break;
e43c066c 936 fClusters10[slice][fN10[slice]] = fClusters[i];
937 fY10[slice][fN10[slice]] = curY;
938 fZ10[slice][fN10[slice]] = fZ[i];
939 fClusterIndex10[slice][fN10[slice]]=i;
940 fN10[slice]++;
941 }
942 }
943 //
944 // slice 5
945 fslice = TMath::Nint(5.*(curY-fYB[0])/(fYB[1]-fYB[0]));
946 ymiddle = fYB[0]+fslice*fDy5;
947 for (Int_t di =-1;di<=1;di++){
948 if (TMath::Abs(curY-(ymiddle+(float)di*fDy5))<0.75*fDy5){
949 //
950 Int_t slice = int(fslice+21.0001)-21+di;
951 if (slice<0) continue;
952 if (slice>5) continue;
2a03f170 953 if (fN5[slice]>=kMaxClusterPerLayer5) break;
e43c066c 954 fClusters5[slice][fN5[slice]] = fClusters[i];
955 fY5[slice][fN5[slice]] = curY;
956 fZ5[slice][fN5[slice]] = fZ[i];
957 fClusterIndex5[slice][fN5[slice]]=i;
958 fN5[slice]++;
959 }
960 }
961 //
962 // slice 20
963 fslice = TMath::Nint(20.*(curY-fYB[0])/(fYB[1]-fYB[0]));
964 ymiddle = fYB[0]+fslice*fDy20;
965 for (Int_t di =-1;di<=1;di++){
966 if (TMath::Abs(curY-(ymiddle+(float)di*fDy20))<0.75*fDy20){
967 //
968 Int_t slice = int(fslice+21.0001)-21+di;
969 if (slice<0) continue;
970 if (slice>20) continue;
2a03f170 971 if (fN20[slice]>=kMaxClusterPerLayer20) break;
e43c066c 972 fClusters20[slice][fN20[slice]] = fClusters[i];
973 fY20[slice][fN20[slice]] = curY;
974 fZ20[slice][fN20[slice]] = fZ[i];
975 fClusterIndex20[slice][fN20[slice]]=i;
976 fN20[slice]++;
977 }
978 }
979 }
980}
981
982
983
984
985Int_t AliITStrackerMI::AliITSlayer::FindClusterIndex(Float_t z) const {
986 //--------------------------------------------------------------------
987 // This function returns the index of the nearest cluster
988 //--------------------------------------------------------------------
989 Int_t ncl=0;
990 const Float_t *zcl;
991 if (fCurrentSlice<0) {
992 ncl = fN;
993 zcl = fZ;
994 }
995 else{
996 ncl = fNcs;
997 zcl = fZcs;;
998 }
999
1000 if (ncl==0) return 0;
1001 Int_t b=0, e=ncl-1, m=(b+e)/2;
1002 for (; b<e; m=(b+e)/2) {
1003 // if (z > fClusters[m]->GetZ()) b=m+1;
1004 if (z > zcl[m]) b=m+1;
1005 else e=m;
1006 }
1007 return m;
1008}
1009/*
1010void AliITStrackerMI::AliITSlayer::
1011SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1012 //--------------------------------------------------------------------
1013 // This function sets the "window"
1014 //--------------------------------------------------------------------
1015 fI=FindClusterIndex(zmin); fZmax=zmax;
1016 fImax = TMath::Min(FindClusterIndex(zmax)+1,fN);
1017 Double_t circle=2*TMath::Pi()*fR;
1018 if (ymax>circle) { ymax-=circle; ymin-=circle; }
1019 fYmin=ymin; fYmax=ymax;
1020 fSkip = 0;
1021}
1022*/
1023
1024
1025void AliITStrackerMI::AliITSlayer::
1026SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1027 //--------------------------------------------------------------------
1028 // This function sets the "window"
1029 //--------------------------------------------------------------------
1030
1031 Double_t circle=2*TMath::Pi()*fR;
1032 fYmin = ymin; fYmax =ymax;
1033 Float_t ymiddle = (fYmin+fYmax)*0.5;
1034 if (ymiddle<fYB[0]) {fYmin+=circle; fYmax+=circle;ymiddle+=circle;}
1035 else{
1036 if (ymiddle>fYB[1]) {fYmin-=circle; fYmax-=circle;ymiddle-=circle;}
1037 }
1038 //
1039 fCurrentSlice =-1;
1040 // defualt take all
1041 fClustersCs = fClusters;
1042 fClusterIndexCs = fClusterIndex;
1043 fYcs = fY;
1044 fZcs = fZ;
1045 fNcs = fN;
1046 //
1047 //is in 20 slice?
1048 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy20){
1049 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy20);
1050 if (slice<0) slice=0;
1051 if (slice>20) slice=20;
1052 Bool_t isOK = (fYmin>fBy20[slice][0]&&fYmax<fBy20[slice][1]);
1053 if (isOK) {
1054 fCurrentSlice=slice;
1055 fClustersCs = fClusters20[fCurrentSlice];
1056 fClusterIndexCs = fClusterIndex20[fCurrentSlice];
1057 fYcs = fY20[fCurrentSlice];
1058 fZcs = fZ20[fCurrentSlice];
1059 fNcs = fN20[fCurrentSlice];
1060 }
1061 }
1062 //
1063 //is in 10 slice?
1064 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy10){
1065 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy10);
1066 if (slice<0) slice=0;
1067 if (slice>10) slice=10;
1068 Bool_t isOK = (fYmin>fBy10[slice][0]&&fYmax<fBy10[slice][1]);
1069 if (isOK) {
1070 fCurrentSlice=slice;
1071 fClustersCs = fClusters10[fCurrentSlice];
1072 fClusterIndexCs = fClusterIndex10[fCurrentSlice];
1073 fYcs = fY10[fCurrentSlice];
1074 fZcs = fZ10[fCurrentSlice];
1075 fNcs = fN10[fCurrentSlice];
1076 }
1077 }
1078 //
1079 //is in 5 slice?
1080 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy5){
1081 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy5);
1082 if (slice<0) slice=0;
1083 if (slice>5) slice=5;
1084 Bool_t isOK = (fYmin>fBy5[slice][0]&&fYmax<fBy5[slice][1]);
1085 if ( isOK){
1086 fCurrentSlice=slice;
1087 fClustersCs = fClusters5[fCurrentSlice];
1088 fClusterIndexCs = fClusterIndex5[fCurrentSlice];
1089 fYcs = fY5[fCurrentSlice];
1090 fZcs = fZ5[fCurrentSlice];
1091 fNcs = fN5[fCurrentSlice];
1092 }
1093 }
1094 //
1095 fI=FindClusterIndex(zmin); fZmax=zmax;
1096 fImax = TMath::Min(FindClusterIndex(zmax)+1,fNcs);
1097 fSkip = 0;
1098 fAccepted =0;
1099}
1100
1101/*
1102const AliITSclusterV2 *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci){
1103 //--------------------------------------------------------------------
1104 // This function returns clusters within the "window"
1105 //--------------------------------------------------------------------
1106 const AliITSclusterV2 *cluster=0;
1107 for (Int_t i=fI; i<fN; i++) {
1108 const AliITSclusterV2 *c=fClusters[i];
1109 if (c->GetZ() > fZmax) break;
1110 // if (c->IsUsed()) continue;
1111 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
1112 Double_t y=fR*det.GetPhi() + c->GetY();
1113
1114 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
1115 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
1116
1117 if (y<fYmin) continue;
1118 if (y>fYmax) continue;
1119 cluster=c; ci=i;
1120 fI=i+1;
1121 break;
1122 }
1123 return cluster;
1124}
1125*/
1126
1127const AliITSclusterV2 *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci){
1128 //--------------------------------------------------------------------
1129 // This function returns clusters within the "window"
1130 //--------------------------------------------------------------------
1131
1132 if (fCurrentSlice<0){
1133 Double_t rpi2 = 2.*fR*TMath::Pi();
1134 for (Int_t i=fI; i<fImax; i++) {
1135 Double_t y = fY[i];
1136 if (fYmax<y) y -= rpi2;
1137 if (y<fYmin) continue;
1138 if (y>fYmax) continue;
1139 if (fClusters[i]->GetQ()==0&&fSkip==2) continue;
1140 ci=i;
1141 fI=i+1;
1142 return fClusters[i];
1143 }
1144 }
1145 else{
1146 for (Int_t i=fI; i<fImax; i++) {
1147 if (fYcs[i]<fYmin) continue;
1148 if (fYcs[i]>fYmax) continue;
1149 if (fClustersCs[i]->GetQ()==0&&fSkip==2) continue;
1150 ci=fClusterIndexCs[i];
1151 fI=i+1;
1152 return fClustersCs[i];
1153 }
1154 }
1155 return 0;
1156}
1157
1158
1159
1160Int_t AliITStrackerMI::AliITSlayer::
1161FindDetectorIndex(Double_t phi, Double_t z) const {
1162 //--------------------------------------------------------------------
1163 //This function finds the detector crossed by the track
1164 //--------------------------------------------------------------------
1165 Double_t dphi=-(phi-fPhiOffset);
1166 if (dphi < 0) dphi += 2*TMath::Pi();
1167 else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi();
1168 Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5);
1169 if (np>=fNladders) np-=fNladders;
1170 if (np<0) np+=fNladders;
1171
1172 Double_t dz=fZOffset-z;
1173 Int_t nz=Int_t(dz*(fNdetectors-1)*0.5/fZOffset+0.5);
1174 if (nz>=fNdetectors) return -1;
1175 if (nz<0) return -1;
1176
1177 return np*fNdetectors + nz;
1178}
1179
1180Double_t AliITStrackerMI::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0)
1181const {
1182 //--------------------------------------------------------------------
1183 //This function returns the layer thickness at this point (units X0)
1184 //--------------------------------------------------------------------
1185 Double_t d=0.0085;
1186 x0=21.82;
1187 if (43<fR&&fR<45) { //SSD2
1188 Double_t dd=0.0034;
1189 d=dd;
1190 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1191 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1192 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1193 for (Int_t i=0; i<12; i++) {
1194 if (TMath::Abs(z-3.9*(i+0.5))<0.15) {
1195 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1196 d+=0.0034;
1197 break;
1198 }
1199 if (TMath::Abs(z+3.9*(i+0.5))<0.15) {
1200 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1201 d+=0.0034;
1202 break;
1203 }
1204 if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1205 if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1206 }
1207 } else
1208 if (37<fR&&fR<41) { //SSD1
1209 Double_t dd=0.0034;
1210 d=dd;
1211 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1212 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1213 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1214 for (Int_t i=0; i<11; i++) {
1215 if (TMath::Abs(z-3.9*i)<0.15) {
1216 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1217 d+=dd;
1218 break;
1219 }
1220 if (TMath::Abs(z+3.9*i)<0.15) {
1221 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1222 d+=dd;
1223 break;
1224 }
1225 if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1226 if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1227 }
1228 } else
1229 if (13<fR&&fR<26) { //SDD
1230 Double_t dd=0.0033;
1231 d=dd;
1232 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1233
1234 if (TMath::Abs(y-1.80)<0.55) {
1235 d+=0.016;
1236 for (Int_t j=0; j<20; j++) {
1237 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1238 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1239 }
1240 }
1241 if (TMath::Abs(y+1.80)<0.55) {
1242 d+=0.016;
1243 for (Int_t j=0; j<20; j++) {
1244 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1245 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1246 }
1247 }
1248
1249 for (Int_t i=0; i<4; i++) {
1250 if (TMath::Abs(z-7.3*i)<0.60) {
1251 d+=dd;
1252 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1253 break;
1254 }
1255 if (TMath::Abs(z+7.3*i)<0.60) {
1256 d+=dd;
1257 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1258 break;
1259 }
1260 }
1261 } else
1262 if (6<fR&&fR<8) { //SPD2
1263 Double_t dd=0.0063; x0=21.5;
1264 d=dd;
1265 if (TMath::Abs(y-3.08)>0.5) d+=dd;
1266 //if (TMath::Abs(y-3.08)>0.45) d+=dd;
1267 if (TMath::Abs(y-3.03)<0.10) {d+=0.014;}
1268 } else
1269 if (3<fR&&fR<5) { //SPD1
1270 Double_t dd=0.0063; x0=21.5;
1271 d=dd;
1272 if (TMath::Abs(y+0.21)>0.6) d+=dd;
1273 //if (TMath::Abs(y+0.21)>0.45) d+=dd;
1274 if (TMath::Abs(y+0.10)<0.10) {d+=0.014;}
1275 }
1276
1277 return d;
1278}
1279
1280Double_t AliITStrackerMI::GetEffectiveThickness(Double_t y,Double_t z) const
1281{
1282 //--------------------------------------------------------------------
1283 //Returns the thickness between the current layer and the vertex (units X0)
1284 //--------------------------------------------------------------------
1285 Double_t d=0.0028*3*3; //beam pipe
1286 Double_t x0=0;
1287
1288 Double_t xn=fgLayers[fI].GetR();
1289 for (Int_t i=0; i<fI; i++) {
1290 Double_t xi=fgLayers[i].GetR();
1291 d+=fgLayers[i].GetThickness(y,z,x0)*xi*xi;
1292 }
1293
1294 if (fI>1) {
1295 Double_t xi=9.;
1296 d+=0.0097*xi*xi;
1297 }
1298
1299 if (fI>3) {
1300 Double_t xi=0.5*(fgLayers[3].GetR()+fgLayers[4].GetR());
1301 d+=0.0034*xi*xi;
1302 }
1303
1304 return d/(xn*xn);
1305}
1306
1307Int_t AliITStrackerMI::AliITSlayer::InRoad() const {
1308 //--------------------------------------------------------------------
1309 // This function returns number of clusters within the "window"
1310 //--------------------------------------------------------------------
1311 Int_t ncl=0;
1312 for (Int_t i=fI; i<fN; i++) {
1313 const AliITSclusterV2 *c=fClusters[i];
1314 if (c->GetZ() > fZmax) break;
1315 if (c->IsUsed()) continue;
1316 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
1317 Double_t y=fR*det.GetPhi() + c->GetY();
1318
1319 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
1320 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
1321
1322 if (y<fYmin) continue;
1323 if (y>fYmax) continue;
1324 ncl++;
1325 }
1326 return ncl;
1327}
1328
1329Bool_t
15dd636f 1330AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *t,const AliITStrackMI *c) {
e43c066c 1331 //--------------------------------------------------------------------
1332 // This function refits the track "t" at the position "x" using
1333 // the clusters from "c"
1334 //--------------------------------------------------------------------
1335 Int_t index[kMaxLayer];
1336 Int_t k;
1337 for (k=0; k<kMaxLayer; k++) index[k]=-1;
1338 Int_t nc=c->GetNumberOfClusters();
1339 for (k=0; k<nc; k++) {
1340 Int_t idx=c->GetClusterIndex(k),nl=(idx&0xf0000000)>>28;
1341 index[nl]=idx;
1342 }
1343
1344 Int_t from, to, step;
1345 if (xx > t->GetX()) {
1346 from=0; to=kMaxLayer;
1347 step=+1;
1348 } else {
1349 from=kMaxLayer-1; to=-1;
1350 step=-1;
1351 }
1352
1353 for (Int_t i=from; i != to; i += step) {
1354 AliITSlayer &layer=fgLayers[i];
1355 Double_t r=layer.GetR();
1356
1357 {
1358 Double_t hI=i-0.5*step;
1359 if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) {
1360 Double_t rs=0.5*(fgLayers[i-step].GetR() + r);
1361 Double_t d=0.0034, x0=38.6;
1362 if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;}
1363 if (!t->PropagateTo(rs,-step*d,x0)) {
1364 return kFALSE;
1365 }
1366 }
1367 }
1368
1369 // remember old position [SR, GSI 18.02.2003]
1370 Double_t oldX=0., oldY=0., oldZ=0.;
1371 if (t->IsStartedTimeIntegral() && step==1) {
1372 t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ);
1373 }
1374 //
1375
1376 Double_t x,y,z;
1377 if (!t->GetGlobalXYZat(r,x,y,z)) {
1378 return kFALSE;
1379 }
1380 Double_t phi=TMath::ATan2(y,x);
1381 Int_t idet=layer.FindDetectorIndex(phi,z);
1382 if (idet<0) {
1383 return kFALSE;
1384 }
1385 const AliITSdetector &det=layer.GetDetector(idet);
1386 phi=det.GetPhi();
1387 if (!t->Propagate(phi,det.GetR())) {
1388 return kFALSE;
1389 }
1390 t->SetDetectorIndex(idet);
1391
1392 const AliITSclusterV2 *cl=0;
1393 Double_t maxchi2=1000.*kMaxChi2;
1394
1395 Int_t idx=index[i];
1396 if (idx>0) {
1397 const AliITSclusterV2 *c=(AliITSclusterV2 *)GetCluster(idx);
1398 if (idet != c->GetDetectorIndex()) {
1399 idet=c->GetDetectorIndex();
1400 const AliITSdetector &det=layer.GetDetector(idet);
1401 if (!t->Propagate(det.GetPhi(),det.GetR())) {
1402 return kFALSE;
1403 }
1404 t->SetDetectorIndex(idet);
1405 }
1406 //Double_t chi2=t->GetPredictedChi2(c);
1407 Int_t layer = (idx & 0xf0000000) >> 28;;
1408 Double_t chi2=GetPredictedChi2MI(t,c,layer);
1409 if (chi2<maxchi2) {
1410 cl=c;
1411 maxchi2=chi2;
1412 } else {
1413 return kFALSE;
1414 }
1415 }
1416 /*
1417 if (cl==0)
1418 if (t->GetNumberOfClusters()>2) {
1419 Double_t dz=4*TMath::Sqrt(t->GetSigmaZ2()+kSigmaZ2[i]);
1420 Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+kSigmaY2[i]);
1421 Double_t zmin=t->GetZ() - dz;
1422 Double_t zmax=t->GetZ() + dz;
1423 Double_t ymin=t->GetY() + phi*r - dy;
1424 Double_t ymax=t->GetY() + phi*r + dy;
1425 layer.SelectClusters(zmin,zmax,ymin,ymax);
1426
1427 const AliITSclusterV2 *c=0; Int_t ci=-1;
1428 while ((c=layer.GetNextCluster(ci))!=0) {
1429 if (idet != c->GetDetectorIndex()) continue;
1430 Double_t chi2=t->GetPredictedChi2(c);
1431 if (chi2<maxchi2) { cl=c; maxchi2=chi2; idx=ci; }
1432 }
1433 }
1434 */
1435 if (cl) {
1436 //if (!t->Update(cl,maxchi2,idx)) {
1437 if (!UpdateMI(t,cl,maxchi2,idx)) {
1438 return kFALSE;
1439 }
1440 t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
1441 }
1442
1443 {
1444 Double_t x0;
1445 Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0);
1446 t->CorrectForMaterial(-step*d,x0);
1447 }
1448
1449 // track time update [SR, GSI 17.02.2003]
1450 if (t->IsStartedTimeIntegral() && step==1) {
1451 Double_t newX, newY, newZ;
1452 t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
1453 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
1454 (oldZ-newZ)*(oldZ-newZ);
1455 t->AddTimeStep(TMath::Sqrt(dL2));
1456 }
1457 //
1458
1459 }
1460
1461 if (!t->PropagateTo(xx,0.,0.)) return kFALSE;
1462 return kTRUE;
1463}
1464
1465
15dd636f 1466Double_t AliITStrackerMI::GetNormalizedChi2(AliITStrackMI * track, Int_t mode)
e43c066c 1467{
1468 //
1469 // calculate normalized chi2
1470 // return NormalizedChi2(track,0);
1471 Float_t chi2 = 0;
1472 Float_t sum=0;
1473 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
1474 // track->fdEdxMismatch=0;
1475 Float_t dedxmismatch =0;
1476 Float_t *ny = GetNy(fCurrentEsdTrack), *nz = GetNz(fCurrentEsdTrack);
1477 if (mode<100){
1478 for (Int_t i = 0;i<6;i++){
1479 if (track->fClIndex[i]>0){
1480 Float_t cerry, cerrz;
1481 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1482 else
1483 { cerry= track->fSigmaY[i]; cerrz = track->fSigmaZ[i];}
1484 cerry*=cerry;
1485 cerrz*=cerrz;
1486 Float_t cchi2 = (track->fDy[i]*track->fDy[i]/cerry)+(track->fDz[i]*track->fDz[i]/cerrz);
1487 if (i>1){
1488 Float_t ratio = track->fNormQ[i]/track->fExpQ;
1489 if (ratio<0.5) {
1490 cchi2+=(0.5-ratio)*10.;
1491 //track->fdEdxMismatch+=(0.5-ratio)*10.;
1492 dedxmismatch+=(0.5-ratio)*10.;
1493 }
1494 }
1495 if (i<2 ||i>3){
1496 AliITSclusterV2 * cl = (AliITSclusterV2*)GetCluster( track->fClIndex[i]);
1497 Double_t delta = cl->GetNy()+cl->GetNz()-ny[i]-nz[i];
1498 if (delta>1) chi2 +=0.5*TMath::Min(delta/2,2.);
1499 if (i<2) chi2+=2*cl->GetDeltaProbability();
1500 }
1501 chi2+=cchi2;
1502 sum++;
1503 }
1504 }
1505 if (TMath::Abs(track->fdEdxMismatch-dedxmismatch)>0.0001){
1506 track->fdEdxMismatch = dedxmismatch;
1507 }
1508 }
1509 else{
1510 for (Int_t i = 0;i<4;i++){
1511 if (track->fClIndex[i]>0){
1512 Float_t cerry, cerrz;
1513 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1514 else { cerry= track->fSigmaY[i]; cerrz = track->fSigmaZ[i];}
1515 cerry*=cerry;
1516 cerrz*=cerrz;
1517 chi2+= (track->fDy[i]*track->fDy[i]/cerry);
1518 chi2+= (track->fDz[i]*track->fDz[i]/cerrz);
1519 sum++;
1520 }
1521 }
1522 for (Int_t i = 4;i<6;i++){
1523 if (track->fClIndex[i]>0){
1524 Float_t cerry, cerrz;
1525 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1526 else { cerry= track->fSigmaY[i]; cerrz = track->fSigmaZ[i];}
1527 cerry*=cerry;
1528 cerrz*=cerrz;
1529 Float_t cerryb, cerrzb;
1530 if (ny[i+6]>0) {cerryb = erry[i+6]; cerrzb=errz[i+6];}
1531 else { cerryb= track->fSigmaY[i+6]; cerrzb = track->fSigmaZ[i+6];}
1532 cerryb*=cerryb;
1533 cerrzb*=cerrzb;
1534 chi2+= TMath::Min((track->fDy[i+6]*track->fDy[i+6]/cerryb),track->fDy[i]*track->fDy[i]/cerry);
1535 chi2+= TMath::Min((track->fDz[i+6]*track->fDz[i+6]/cerrzb),track->fDz[i]*track->fDz[i]/cerrz);
1536 sum++;
1537 }
1538 }
1539 }
1540 if (track->fESDtrack->GetTPCsignal()>85){
1541 Float_t ratio = track->fdEdx/track->fESDtrack->GetTPCsignal();
1542 if (ratio<0.5) {
1543 chi2+=(0.5-ratio)*5.;
1544 }
1545 if (ratio>2){
1546 chi2+=(ratio-2.0)*3;
1547 }
1548 }
1549 //
1550 Double_t match = TMath::Sqrt(track->fChi22);
1551 if (track->fConstrain) match/=track->GetNumberOfClusters();
1552 if (!track->fConstrain) match/=track->GetNumberOfClusters()-2.;
1553 if (match<0) match=0;
1554 Float_t deadzonefactor = (track->fNDeadZone>0) ? 3*(1.1-track->fDeadZoneProbability):0.;
1555 Double_t normchi2 = 2*track->fNSkipped+match+deadzonefactor+(1+(2*track->fNSkipped+deadzonefactor)/track->GetNumberOfClusters())*
1556 (chi2)/TMath::Max(double(sum-track->fNSkipped),
1557 1./(1.+track->fNSkipped));
1558
1559 return normchi2;
1560}
1561
1562
15dd636f 1563Double_t AliITStrackerMI::GetMatchingChi2(AliITStrackMI * track1, AliITStrackMI * track2)
e43c066c 1564{
1565 //
1566 // return matching chi2 between two tracks
15dd636f 1567 AliITStrackMI track3(*track2);
e43c066c 1568 track3.Propagate(track1->GetAlpha(),track1->GetX());
1569 TMatrixD vec(5,1);
1570 vec(0,0)=track1->fP0-track3.fP0;
1571 vec(1,0)=track1->fP1-track3.fP1;
1572 vec(2,0)=track1->fP2-track3.fP2;
1573 vec(3,0)=track1->fP3-track3.fP3;
1574 vec(4,0)=track1->fP4-track3.fP4;
1575 //
1576 TMatrixD cov(5,5);
1577 cov(0,0) = track1->fC00+track3.fC00;
1578 cov(1,1) = track1->fC11+track3.fC11;
1579 cov(2,2) = track1->fC22+track3.fC22;
1580 cov(3,3) = track1->fC33+track3.fC33;
1581 cov(4,4) = track1->fC44+track3.fC44;
1582
1583 cov(0,1)=cov(1,0) = track1->fC10+track3.fC10;
1584 cov(0,2)=cov(2,0) = track1->fC20+track3.fC20;
1585 cov(0,3)=cov(3,0) = track1->fC30+track3.fC30;
1586 cov(0,4)=cov(4,0) = track1->fC40+track3.fC40;
1587 //
1588 cov(1,2)=cov(2,1) = track1->fC21+track3.fC21;
1589 cov(1,3)=cov(3,1) = track1->fC31+track3.fC31;
1590 cov(1,4)=cov(4,1) = track1->fC41+track3.fC41;
1591 //
1592 cov(2,3)=cov(3,2) = track1->fC32+track3.fC32;
1593 cov(2,4)=cov(4,2) = track1->fC42+track3.fC42;
1594 //
1595 cov(3,4)=cov(4,3) = track1->fC43+track3.fC43;
1596
1597 cov.Invert();
1598 TMatrixD vec2(cov,TMatrixD::kMult,vec);
1599 TMatrixD chi2(vec2,TMatrixD::kTransposeMult,vec);
1600 return chi2(0,0);
1601}
1602
1603Double_t AliITStrackerMI::GetDeadZoneProbability(Double_t zpos, Double_t zerr)
1604{
1605 //
1606 // return probability that given point - characterized by z position and error is in dead zone
1607 //
1608 Double_t probability =0;
1609 Double_t absz = TMath::Abs(zpos);
1610 Double_t nearestz = (absz<2)? 0.:7.1;
1611 if (TMath::Abs(absz-nearestz)>0.25+3*zerr) return 0;
1612 Double_t zmin=0, zmax=0;
1613 if (zpos<-6.){
1614 zmin = -7.25; zmax = -6.95;
1615 }
1616 if (zpos>6){
1617 zmin = 7.0; zmax =7.3;
1618 }
1619 if (absz<2){
1620 zmin = -0.75; zmax = 1.5;
1621 }
1622 probability = (TMath::Erf((zpos-zmin)/zerr) - TMath::Erf((zpos-zmax)/zerr))*0.5;
1623 return probability;
1624}
1625
1626
15dd636f 1627Double_t AliITStrackerMI::GetTruncatedChi2(AliITStrackMI * track, Float_t fac)
e43c066c 1628{
1629 //
1630 // calculate normalized chi2
1631 Float_t chi2[6];
1632 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
1633 Float_t ncl = 0;
1634 for (Int_t i = 0;i<6;i++){
1635 if (TMath::Abs(track->fDy[i])>0){
1636 chi2[i]= (track->fDy[i]/erry[i])*(track->fDy[i]/erry[i]);
1637 chi2[i]+= (track->fDz[i]/errz[i])*(track->fDz[i]/errz[i]);
1638 ncl++;
1639 }
1640 else{chi2[i]=10000;}
1641 }
1642 Int_t index[6];
1643 TMath::Sort(6,chi2,index,kFALSE);
1644 Float_t max = float(ncl)*fac-1.;
1645 Float_t sumchi=0, sumweight=0;
1646 for (Int_t i=0;i<max+1;i++){
1647 Float_t weight = (i<max)?1.:(max+1.-i);
1648 sumchi+=weight*chi2[index[i]];
1649 sumweight+=weight;
1650 }
1651 Double_t normchi2 = sumchi/sumweight;
1652 return normchi2;
1653}
1654
1655
15dd636f 1656Double_t AliITStrackerMI::GetInterpolatedChi2(AliITStrackMI * forwardtrack, AliITStrackMI * backtrack)
e43c066c 1657{
1658 //
1659 // calculate normalized chi2
1660 // if (forwardtrack->fNUsed>0.3*float(forwardtrack->GetNumberOfClusters())) return 10000;
1661 Int_t npoints = 0;
1662 Double_t res =0;
1663 for (Int_t i=0;i<6;i++){
1664 if ( (backtrack->fSigmaY[i]<0.000000001) || (forwardtrack->fSigmaY[i]<0.000000001)) continue;
1665 Double_t sy1 = forwardtrack->fSigmaY[i];
1666 Double_t sz1 = forwardtrack->fSigmaZ[i];
1667 Double_t sy2 = backtrack->fSigmaY[i];
1668 Double_t sz2 = backtrack->fSigmaZ[i];
1669 if (i<2){ sy2=1000.;sz2=1000;}
1670 //
1671 Double_t dy0 = (forwardtrack->fDy[i]/(sy1*sy1) +backtrack->fDy[i]/(sy2*sy2))/(1./(sy1*sy1)+1./(sy2*sy2));
1672 Double_t dz0 = (forwardtrack->fDz[i]/(sz1*sz1) +backtrack->fDz[i]/(sz2*sz2))/(1./(sz1*sz1)+1./(sz2*sz2));
1673 //
1674 Double_t nz0 = dz0*TMath::Sqrt((1./(sz1*sz1)+1./(sz2*sz2)));
1675 Double_t ny0 = dy0*TMath::Sqrt((1./(sy1*sy1)+1./(sy2*sy2)));
1676 //
1677 res+= nz0*nz0+ny0*ny0;
1678 npoints++;
1679 }
1680 if (npoints>1) return
1681 TMath::Max(TMath::Abs(0.3*forwardtrack->Get1Pt())-0.5,0.)+
1682 //2*forwardtrack->fNUsed+
1683 res/TMath::Max(double(npoints-forwardtrack->fNSkipped),
1684 1./(1.+forwardtrack->fNSkipped));
1685 return 1000;
1686}
1687
1688
1689
1690
1691
1692Float_t *AliITStrackerMI::GetWeight(Int_t index) {
1693 //--------------------------------------------------------------------
1694 // Return pointer to a given cluster
1695 //--------------------------------------------------------------------
1696 Int_t l=(index & 0xf0000000) >> 28;
1697 Int_t c=(index & 0x0fffffff) >> 00;
1698 return fgLayers[l].GetWeight(c);
1699}
1700
15dd636f 1701void AliITStrackerMI::RegisterClusterTracks(AliITStrackMI* track,Int_t id)
e43c066c 1702{
1703 //---------------------------------------------
1704 // register track to the list
1705 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
1706 Int_t index = track->GetClusterIndex(icluster);
1707 Int_t l=(index & 0xf0000000) >> 28;
1708 Int_t c=(index & 0x0fffffff) >> 00;
1709 if (c>fgLayers[l].fN) continue;
1710 for (Int_t itrack=0;itrack<4;itrack++){
1711 if (fgLayers[l].fClusterTracks[itrack][c]<0){
1712 fgLayers[l].fClusterTracks[itrack][c]=id;
1713 break;
1714 }
1715 }
1716 }
1717}
15dd636f 1718void AliITStrackerMI::UnRegisterClusterTracks(AliITStrackMI* track, Int_t id)
e43c066c 1719{
1720 //---------------------------------------------
1721 // unregister track from the list
1722 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
1723 Int_t index = track->GetClusterIndex(icluster);
1724 Int_t l=(index & 0xf0000000) >> 28;
1725 Int_t c=(index & 0x0fffffff) >> 00;
1726 if (c>fgLayers[l].fN) continue;
1727 for (Int_t itrack=0;itrack<4;itrack++){
1728 if (fgLayers[l].fClusterTracks[itrack][c]==id){
1729 fgLayers[l].fClusterTracks[itrack][c]=-1;
1730 }
1731 }
1732 }
1733}
15dd636f 1734Float_t AliITStrackerMI::GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSclusterV2 *clist[6])
e43c066c 1735{
1736 //-------------------------------------------------------------
1737 //get number of shared clusters
1738 //-------------------------------------------------------------
1739 Float_t shared=0;
1740 for (Int_t i=0;i<6;i++) { list[i]=-1, clist[i]=0;}
1741 // mean number of clusters
1742 Float_t *ny = GetNy(id), *nz = GetNz(id);
1743
1744
1745 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
1746 Int_t index = track->GetClusterIndex(icluster);
1747 Int_t l=(index & 0xf0000000) >> 28;
1748 Int_t c=(index & 0x0fffffff) >> 00;
1749 if (c>fgLayers[l].fN) continue;
1750 if (ny[l]==0){
1751 printf("problem\n");
1752 }
1753 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(index);
1754 Float_t weight=1;
1755 //
1756 Float_t deltan = 0;
1757 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
1758 if (l>2&&track->fNormQ[l]/track->fExpQ>3.5) continue;
1759 if (l<2 || l>3){
1760 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
1761 }
1762 else{
1763 deltan = (cl->GetNz()-nz[l]);
1764 }
1765 if (deltan>2.0) continue; // extended - highly probable shared cluster
1766 weight = 2./TMath::Max(3.+deltan,2.);
1767 //
1768 for (Int_t itrack=0;itrack<4;itrack++){
1769 if (fgLayers[l].fClusterTracks[itrack][c]>=0 && fgLayers[l].fClusterTracks[itrack][c]!=id){
1770 list[l]=index;
1771 clist[l] = (AliITSclusterV2*)GetCluster(index);
1772 shared+=weight;
1773 break;
1774 }
1775 }
1776 }
1777 track->fNUsed=shared;
1778 return shared;
1779}
1780
15dd636f 1781Int_t AliITStrackerMI::GetOverlapTrack(AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6],Int_t overlist[6])
e43c066c 1782{
1783 //
1784 // find first shared track
1785 //
1786 // mean number of clusters
1787 Float_t *ny = GetNy(trackID), *nz = GetNz(trackID);
1788 //
1789 for (Int_t i=0;i<6;i++) overlist[i]=-1;
1790 Int_t sharedtrack=100000;
1791 Int_t tracks[24],trackindex=0;
1792 for (Int_t i=0;i<24;i++) {tracks[i]=-1;}
1793 //
1794 for (Int_t icluster=0;icluster<6;icluster++){
1795 if (clusterlist[icluster]<0) continue;
1796 Int_t index = clusterlist[icluster];
1797 Int_t l=(index & 0xf0000000) >> 28;
1798 Int_t c=(index & 0x0fffffff) >> 00;
1799 if (ny[l]==0){
1800 printf("problem\n");
1801 }
1802 if (c>fgLayers[l].fN) continue;
1803 //if (l>3) continue;
1804 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(index);
1805 //
1806 Float_t deltan = 0;
1807 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
1808 if (l>2&&track->fNormQ[l]/track->fExpQ>3.5) continue;
1809 if (l<2 || l>3){
1810 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
1811 }
1812 else{
1813 deltan = (cl->GetNz()-nz[l]);
1814 }
1815 if (deltan>2.0) continue; // extended - highly probable shared cluster
1816 //
1817 for (Int_t itrack=3;itrack>=0;itrack--){
1818 if (fgLayers[l].fClusterTracks[itrack][c]<0) continue;
1819 if (fgLayers[l].fClusterTracks[itrack][c]!=trackID){
1820 tracks[trackindex] = fgLayers[l].fClusterTracks[itrack][c];
1821 trackindex++;
1822 }
1823 }
1824 }
1825 if (trackindex==0) return -1;
1826 if (trackindex==1){
1827 sharedtrack = tracks[0];
1828 }else{
1829 if (trackindex==2) sharedtrack =TMath::Min(tracks[0],tracks[1]);
1830 else{
1831 //
1832 Int_t track[24], cluster[24];
1833 for (Int_t i=0;i<trackindex;i++){ track[i]=-1; cluster[i]=0;}
1834 Int_t index =0;
1835 //
1836 for (Int_t i=0;i<trackindex;i++){
1837 if (tracks[i]<0) continue;
1838 track[index] = tracks[i];
1839 cluster[index]++;
1840 for (Int_t j=i+1;j<trackindex;j++){
1841 if (tracks[j]<0) continue;
1842 if (tracks[j]==tracks[i]){
1843 cluster[index]++;
1844 tracks[j]=-1;
1845 }
1846 }
1847 index++;
1848 }
1849 Int_t max=0;
1850 for (Int_t i=0;i<index;i++){
1851 if (cluster[index]>max) {
1852 sharedtrack=track[index];
1853 max=cluster[index];
1854 }
1855 }
1856 }
1857 }
1858
1859 if (sharedtrack>=100000) return -1;
1860 //
1861 // make list of overlaps
1862 shared =0;
1863 for (Int_t icluster=0;icluster<6;icluster++){
1864 if (clusterlist[icluster]<0) continue;
1865 Int_t index = clusterlist[icluster];
1866 Int_t l=(index & 0xf0000000) >> 28;
1867 Int_t c=(index & 0x0fffffff) >> 00;
1868 if (c>fgLayers[l].fN) continue;
1869 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(index);
1870 if (l==0 || l==1){
1871 if (cl->GetNy()>2) continue;
1872 if (cl->GetNz()>2) continue;
1873 }
1874 if (l==4 || l==5){
1875 if (cl->GetNy()>3) continue;
1876 if (cl->GetNz()>3) continue;
1877 }
1878 //
1879 for (Int_t itrack=3;itrack>=0;itrack--){
1880 if (fgLayers[l].fClusterTracks[itrack][c]<0) continue;
1881 if (fgLayers[l].fClusterTracks[itrack][c]==sharedtrack){
1882 overlist[l]=index;
1883 shared++;
1884 }
1885 }
1886 }
1887 return sharedtrack;
1888}
1889
1890
15dd636f 1891AliITStrackMI * AliITStrackerMI::GetBest2Tracks(Int_t trackID1, Int_t trackID2, Float_t th0, Float_t th1){
e43c066c 1892 //
1893 // try to find track hypothesys without conflicts
1894 // with minimal chi2;
1895 TClonesArray *arr1 = (TClonesArray*)fTrackHypothesys.At(trackID1);
1896 Int_t entries1 = arr1->GetEntriesFast();
1897 TClonesArray *arr2 = (TClonesArray*)fTrackHypothesys.At(trackID2);
15dd636f 1898 if (!arr2) return (AliITStrackMI*) arr1->UncheckedAt(0);
e43c066c 1899 Int_t entries2 = arr2->GetEntriesFast();
15dd636f 1900 if (entries2<=0) return (AliITStrackMI*) arr1->UncheckedAt(0);
e43c066c 1901 //
15dd636f 1902 AliITStrackMI * track10=(AliITStrackMI*) arr1->UncheckedAt(0);
1903 AliITStrackMI * track20=(AliITStrackMI*) arr2->UncheckedAt(0);
e43c066c 1904 if (TMath::Abs(1./track10->Get1Pt())>0.5+TMath::Abs(1/track20->Get1Pt())) return track10;
1905
1906 for (Int_t itrack=0;itrack<entries1;itrack++){
15dd636f 1907 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
e43c066c 1908 UnRegisterClusterTracks(track,trackID1);
1909 }
1910 //
1911 for (Int_t itrack=0;itrack<entries2;itrack++){
15dd636f 1912 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
e43c066c 1913 UnRegisterClusterTracks(track,trackID2);
1914 }
1915 Int_t index1=0;
1916 Int_t index2=0;
1917 Float_t maxconflicts=6;
1918 Double_t maxchi2 =1000.;
1919 //
1920 // get weight of hypothesys - using best hypothesy
1921 Double_t w1,w2;
1922
1923 Int_t list1[6],list2[6];
1924 AliITSclusterV2 *clist1[6], *clist2[6] ;
1925 RegisterClusterTracks(track10,trackID1);
1926 RegisterClusterTracks(track20,trackID2);
1927 Float_t conflict1 = GetNumberOfSharedClusters(track10,trackID1,list1,clist1);
1928 Float_t conflict2 = GetNumberOfSharedClusters(track20,trackID2,list2,clist2);
1929 UnRegisterClusterTracks(track10,trackID1);
1930 UnRegisterClusterTracks(track20,trackID2);
1931 //
1932 // normalized chi2
1933 Float_t chi21 =0,chi22=0,ncl1=0,ncl2=0;
1934 Float_t nerry[6],nerrz[6];
1935 Float_t *erry1=GetErrY(trackID1),*errz1 = GetErrZ(trackID1);
1936 Float_t *erry2=GetErrY(trackID2),*errz2 = GetErrZ(trackID2);
1937 for (Int_t i=0;i<6;i++){
1938 if ( (erry1[i]>0) && (erry2[i]>0)) {
1939 nerry[i] = TMath::Min(erry1[i],erry2[i]);
1940 nerrz[i] = TMath::Min(errz1[i],errz2[i]);
1941 }else{
1942 nerry[i] = TMath::Max(erry1[i],erry2[i]);
1943 nerrz[i] = TMath::Max(errz1[i],errz2[i]);
1944 }
1945 if (TMath::Abs(track10->fDy[i])>0.000000000000001){
1946 chi21 += track10->fDy[i]*track10->fDy[i]/(nerry[i]*nerry[i]);
1947 chi21 += track10->fDz[i]*track10->fDz[i]/(nerrz[i]*nerrz[i]);
1948 ncl1++;
1949 }
1950 if (TMath::Abs(track20->fDy[i])>0.000000000000001){
1951 chi22 += track20->fDy[i]*track20->fDy[i]/(nerry[i]*nerry[i]);
1952 chi22 += track20->fDz[i]*track20->fDz[i]/(nerrz[i]*nerrz[i]);
1953 ncl2++;
1954 }
1955 }
1956 chi21/=ncl1;
1957 chi22/=ncl2;
1958 //
1959 //
1960 Float_t d1 = TMath::Sqrt(track10->fD[0]*track10->fD[0]+track10->fD[1]*track10->fD[1])+0.1;
1961 Float_t d2 = TMath::Sqrt(track20->fD[0]*track20->fD[0]+track20->fD[1]*track20->fD[1])+0.1;
1962 Float_t s1 = TMath::Sqrt(track10->GetSigmaY2()*track10->GetSigmaZ2());
1963 Float_t s2 = TMath::Sqrt(track20->GetSigmaY2()*track20->GetSigmaZ2());
1964 //
1965 w1 = (d2/(d1+d2)+ 2*s2/(s1+s2)+
1966 +s2/(s1+s2)*0.5*(chi22+2.)/(chi21+chi22+4.)
1967 +1.*TMath::Abs(1./track10->Get1Pt())/(TMath::Abs(1./track10->Get1Pt())+TMath::Abs(1./track20->Get1Pt()))
1968 );
1969 w2 = (d1/(d1+d2)+ 2*s1/(s1+s2)+
1970 s1/(s1+s2)*0.5*(chi21+2.)/(chi21+chi22+4.)
1971 +1.*TMath::Abs(1./track20->Get1Pt())/(TMath::Abs(1./track10->Get1Pt())+TMath::Abs(1./track20->Get1Pt()))
1972 );
1973
1974 Double_t sumw = w1+w2;
1975 w1/=sumw;
1976 w2/=sumw;
1977 if (w1<w2*0.5) {
1978 w1 = (d2+0.5)/(d1+d2+1.);
1979 w2 = (d1+0.5)/(d1+d2+1.);
1980 }
1981 // Float_t maxmax = w1*track10->fChi2MIP[0]+w2*track20->fChi2MIP[0]+w1*conflict1+w2*conflict2+1.;
1982 //Float_t maxconflicts0 = w1*conflict1+w2*conflict2;
1983 //
1984 // get pair of "best" hypothesys
1985 //
1986 Float_t * ny1 = GetNy(trackID1), * nz1 = GetNz(trackID1);
1987 Float_t * ny2 = GetNy(trackID2), * nz2 = GetNz(trackID2);
1988
1989 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
15dd636f 1990 AliITStrackMI * track1=(AliITStrackMI*) arr1->UncheckedAt(itrack1);
e43c066c 1991 //if (track1->fFakeRatio>0) continue;
1992 RegisterClusterTracks(track1,trackID1);
1993 for (Int_t itrack2=0;itrack2<entries2;itrack2++){
15dd636f 1994 AliITStrackMI * track2=(AliITStrackMI*) arr2->UncheckedAt(itrack2);
e43c066c 1995
1996 // Float_t current = w1*track1->fChi2MIP[0]+w2*track2->fChi2MIP[0];
1997 //if (track2->fFakeRatio>0) continue;
1998 Float_t nskipped=0;
1999 RegisterClusterTracks(track2,trackID2);
2000 Int_t list1[6],list2[6];
2001 AliITSclusterV2 *clist1[6], *clist2[6] ;
2002 Float_t cconflict1 = GetNumberOfSharedClusters(track1,trackID1,list1,clist1);
2003 Float_t cconflict2 = GetNumberOfSharedClusters(track2,trackID2,list2,clist2);
2004 UnRegisterClusterTracks(track2,trackID2);
2005 //
2006 if (track1->fConstrain) nskipped+=w1*track1->fNSkipped;
2007 if (track2->fConstrain) nskipped+=w2*track2->fNSkipped;
2008 if (nskipped>0.5) continue;
2009 //
2010 //if ( w1*conflict1+w2*conflict2>maxconflicts0) continue;
2011 if (conflict1+1<cconflict1) continue;
2012 if (conflict2+1<cconflict2) continue;
2013 Float_t conflict=0;
2014 Float_t sumchi2=0;
2015 Float_t sum=0;
2016 for (Int_t i=0;i<6;i++){
2017 //
2018 Float_t c1 =0.; // conflict coeficients
2019 Float_t c2 =0.;
2020 if (clist1[i]&&clist2[i]){
2021 Float_t deltan = 0;
2022 if (i<2 || i>3){
2023 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-TMath::Max(ny1[i],ny2[i])-TMath::Max(nz1[i],nz2[i]));
2024 }
2025 else{
2026 deltan = (clist1[i]->GetNz()-TMath::Max(nz1[i],nz2[i]));
2027 }
2028 c1 = 2./TMath::Max(3.+deltan,2.);
2029 c2 = 2./TMath::Max(3.+deltan,2.);
2030 }
2031 else{
2032 if (clist1[i]){
2033 Float_t deltan = 0;
2034 if (i<2 || i>3){
2035 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-ny1[i]-nz1[i]);
2036 }
2037 else{
2038 deltan = (clist1[i]->GetNz()-nz1[i]);
2039 }
2040 c1 = 2./TMath::Max(3.+deltan,2.);
2041 c2 = 0;
2042 }
2043
2044 if (clist2[i]){
2045 Float_t deltan = 0;
2046 if (i<2 || i>3){
2047 deltan = (clist2[i]->GetNy()+clist2[i]->GetNz()-ny2[i]-nz2[i]);
2048 }
2049 else{
2050 deltan = (clist2[i]->GetNz()-nz2[i]);
2051 }
2052 c2 = 2./TMath::Max(3.+deltan,2.);
2053 c1 = 0;
2054 }
2055 }
2056 //
2057 Double_t chi21=0,chi22=0;
2058 if (TMath::Abs(track1->fDy[i])>0.) {
2059 chi21 = (track1->fDy[i]/track1->fSigmaY[i])*(track1->fDy[i]/track1->fSigmaY[i])+
2060 (track1->fDz[i]/track1->fSigmaZ[i])*(track1->fDz[i]/track1->fSigmaZ[i]);
2061 //chi21 = (track1->fDy[i]*track1->fDy[i])/(nerry[i]*nerry[i])+
2062 // (track1->fDz[i]*track1->fDz[i])/(nerrz[i]*nerrz[i]);
2063 }else{
2064 if (TMath::Abs(track1->fSigmaY[i]>0.)) c1=1;
2065 }
2066 //
2067 if (TMath::Abs(track2->fDy[i])>0.) {
2068 chi22 = (track2->fDy[i]/track2->fSigmaY[i])*(track2->fDy[i]/track2->fSigmaY[i])+
2069 (track2->fDz[i]/track2->fSigmaZ[i])*(track2->fDz[i]/track2->fSigmaZ[i]);
2070 //chi22 = (track2->fDy[i]*track2->fDy[i])/(nerry[i]*nerry[i])+
2071 // (track2->fDz[i]*track2->fDz[i])/(nerrz[i]*nerrz[i]);
2072 }
2073 else{
2074 if (TMath::Abs(track2->fSigmaY[i]>0.)) c2=1;
2075 }
2076 sumchi2+=w1*(1.+c1)*(1+c1)*(chi21+c1)+w2*(1.+c2)*(1+c2)*(chi22+c2);
2077 if (chi21>0) sum+=w1;
2078 if (chi22>0) sum+=w2;
2079 conflict+=(c1+c2);
2080 }
2081 Double_t norm = sum-w1*track1->fNSkipped-w2*track2->fNSkipped;
2082 if (norm<0) norm =1/(w1*track1->fNSkipped+w2*track2->fNSkipped);
2083 Double_t normchi2 = 2*conflict+sumchi2/sum;
2084 if ( normchi2 <maxchi2 ){
2085 index1 = itrack1;
2086 index2 = itrack2;
2087 maxconflicts = conflict;
2088 maxchi2 = normchi2;
2089 }
2090 }
2091 UnRegisterClusterTracks(track1,trackID1);
2092 }
2093 //
2094 // if (maxconflicts<4 && maxchi2<th0){
2095 if (maxchi2<th0*2.){
2096 Float_t orig = track10->fFakeRatio*track10->GetNumberOfClusters();
15dd636f 2097 AliITStrackMI* track1=(AliITStrackMI*) arr1->UncheckedAt(index1);
e43c066c 2098 track1->fChi2MIP[5] = maxconflicts;
2099 track1->fChi2MIP[6] = maxchi2;
2100 track1->fChi2MIP[7] = 0.01+orig-(track1->fFakeRatio*track1->GetNumberOfClusters());
2101 // track1->UpdateESDtrack(AliESDtrack::kITSin);
2102 track1->fChi2MIP[8] = index1;
2103 fBestTrackIndex[trackID1] =index1;
2104 UpdateESDtrack(track1, AliESDtrack::kITSin);
2105 }
2106 else if (track10->fChi2MIP[0]<th1){
2107 track10->fChi2MIP[5] = maxconflicts;
2108 track10->fChi2MIP[6] = maxchi2;
2109 // track10->UpdateESDtrack(AliESDtrack::kITSin);
2110 UpdateESDtrack(track10,AliESDtrack::kITSin);
2111 }
2112
2113 for (Int_t itrack=0;itrack<entries1;itrack++){
15dd636f 2114 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
e43c066c 2115 UnRegisterClusterTracks(track,trackID1);
2116 }
2117 //
2118 for (Int_t itrack=0;itrack<entries2;itrack++){
15dd636f 2119 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
e43c066c 2120 UnRegisterClusterTracks(track,trackID2);
2121 }
2122
2123 if (track10->fConstrain&&track10->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track10->fChi2MIP[1]<kMaxChi2PerCluster[1]
2124 &&track10->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track10->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2125 // if (track10->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track10->fChi2MIP[1]<kMaxChi2PerCluster[1]
2126 // &&track10->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track10->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2127 RegisterClusterTracks(track10,trackID1);
2128 }
2129 if (track20->fConstrain&&track20->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track20->fChi2MIP[1]<kMaxChi2PerCluster[1]
2130 &&track20->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track20->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2131 //if (track20->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track20->fChi2MIP[1]<kMaxChi2PerCluster[1]
2132 // &&track20->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track20->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2133 RegisterClusterTracks(track20,trackID2);
2134 }
2135 return track10;
2136
2137}
2138
2139void AliITStrackerMI::UseClusters(const AliKalmanTrack *t, Int_t from) const {
2140 //--------------------------------------------------------------------
2141 // This function marks clusters assigned to the track
2142 //--------------------------------------------------------------------
2143 AliTracker::UseClusters(t,from);
2144
2145 AliITSclusterV2 *c=(AliITSclusterV2 *)GetCluster(t->GetClusterIndex(0));
2146 //if (c->GetQ()>2) c->Use();
2147 if (c->GetSigmaZ2()>0.1) c->Use();
2148 c=(AliITSclusterV2 *)GetCluster(t->GetClusterIndex(1));
2149 //if (c->GetQ()>2) c->Use();
2150 if (c->GetSigmaZ2()>0.1) c->Use();
2151
2152}
2153
2154
15dd636f 2155void AliITStrackerMI::AddTrackHypothesys(AliITStrackMI * track, Int_t esdindex)
e43c066c 2156{
2157 //------------------------------------------------------------------
2158 // add track to the list of hypothesys
2159 //------------------------------------------------------------------
2160
2161 if (esdindex>=fTrackHypothesys.GetEntriesFast()) fTrackHypothesys.Expand(esdindex*2+10);
2162 //
2163 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2164 if (!array) {
2165 array = new TObjArray(10);
2166 fTrackHypothesys.AddAt(array,esdindex);
2167 }
2168 array->AddLast(track);
2169}
2170
2171void AliITStrackerMI::SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode)
2172{
2173 //-------------------------------------------------------------------
2174 // compress array of track hypothesys
2175 // keep only maxsize best hypothesys
2176 //-------------------------------------------------------------------
2177 if (esdindex>fTrackHypothesys.GetEntriesFast()) return;
2178 if (! (fTrackHypothesys.At(esdindex)) ) return;
2179 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2180 Int_t entries = array->GetEntriesFast();
2181 //
2182 //- find preliminary besttrack as a reference
2183 Float_t minchi2=10000;
2184 Int_t maxn=0;
15dd636f 2185 AliITStrackMI * besttrack=0;
e43c066c 2186 for (Int_t itrack=0;itrack<array->GetEntriesFast();itrack++){
15dd636f 2187 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2188 if (!track) continue;
2189 Float_t chi2 = NormalizedChi2(track,0);
2190 //
2191 Int_t tpcLabel=track->fESDtrack->GetTPCLabel();
2192 track->SetLabel(tpcLabel);
2193 CookdEdx(track);
2194 track->fFakeRatio=1.;
2195 CookLabel(track,0.); //For comparison only
2196 //
2197 //if (chi2<kMaxChi2PerCluster[0]&&track->fFakeRatio==0){
2198 if (chi2<kMaxChi2PerCluster[0]){
2199 if (track->GetNumberOfClusters()<maxn) continue;
2200 maxn = track->GetNumberOfClusters();
2201 if (chi2<minchi2){
2202 minchi2=chi2;
2203 besttrack=track;
2204 }
2205 }
2206 else{
2207 delete array->RemoveAt(itrack);
2208 }
2209 }
2210 if (!besttrack) return;
2211 //
2212 //
2213 //take errors of best track as a reference
2214 Float_t *erry = GetErrY(esdindex), *errz = GetErrZ(esdindex);
2215 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
2216 for (Int_t i=0;i<6;i++) {
2217 if (besttrack->fClIndex[i]>0){
2218 erry[i] = besttrack->fSigmaY[i]; erry[i+6] = besttrack->fSigmaY[i+6];
2219 errz[i] = besttrack->fSigmaZ[i]; errz[i+6] = besttrack->fSigmaZ[i+6];
2220 ny[i] = besttrack->fNy[i];
2221 nz[i] = besttrack->fNz[i];
2222 }
2223 }
2224 //
2225 // calculate normalized chi2
2226 //
2227 Float_t * chi2 = new Float_t[entries];
2228 Int_t * index = new Int_t[entries];
2229 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2230 for (Int_t itrack=0;itrack<entries;itrack++){
15dd636f 2231 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2232 if (track){
2233 track->fChi2MIP[0] = GetNormalizedChi2(track, mode);
2234 if (track->fChi2MIP[0]<kMaxChi2PerCluster[0])
2235 chi2[itrack] = track->fChi2MIP[0];
2236 else
2237 delete array->RemoveAt(itrack);
2238 }
2239 }
2240 //
2241 TMath::Sort(entries,chi2,index,kFALSE);
15dd636f 2242 besttrack = (AliITStrackMI*)array->At(index[0]);
e43c066c 2243 if (besttrack&&besttrack->fChi2MIP[0]<kMaxChi2PerCluster[0]){
2244 for (Int_t i=0;i<6;i++){
2245 if (besttrack->fClIndex[i]>0){
2246 erry[i] = besttrack->fSigmaY[i]; erry[i+6] = besttrack->fSigmaY[i+6];
2247 errz[i] = besttrack->fSigmaZ[i]; erry[i+6] = besttrack->fSigmaY[i+6];
2248 ny[i] = besttrack->fNy[i];
2249 nz[i] = besttrack->fNz[i];
2250 }
2251 }
2252 }
2253 //
2254 // calculate one more time with updated normalized errors
2255 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2256 for (Int_t itrack=0;itrack<entries;itrack++){
15dd636f 2257 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2258 if (track){
2259 track->fChi2MIP[0] = GetNormalizedChi2(track,mode);
2260 if (track->fChi2MIP[0]<kMaxChi2PerCluster[0])
2261 chi2[itrack] = track->fChi2MIP[0]-0*(track->GetNumberOfClusters()+track->fNDeadZone);
2262 else
2263 delete array->RemoveAt(itrack);
2264 }
2265 }
2266 entries = array->GetEntriesFast();
2267 //
2268 if (entries>0){
2269 TObjArray * newarray = new TObjArray();
2270 TMath::Sort(entries,chi2,index,kFALSE);
15dd636f 2271 besttrack = (AliITStrackMI*)array->At(index[0]);
e43c066c 2272 if (besttrack){
2273 //
2274 for (Int_t i=0;i<6;i++){
2275 if (besttrack->fNz[i]>0&&besttrack->fNy[i]>0){
2276 erry[i] = besttrack->fSigmaY[i]; erry[i+6] = besttrack->fSigmaY[i+6];
2277 errz[i] = besttrack->fSigmaZ[i]; errz[i+6] = besttrack->fSigmaZ[i+6];
2278 ny[i] = besttrack->fNy[i];
2279 nz[i] = besttrack->fNz[i];
2280 }
2281 }
2282 besttrack->fChi2MIP[0] = GetNormalizedChi2(besttrack,mode);
2283 Float_t minchi2 = TMath::Min(besttrack->fChi2MIP[0]+5.+besttrack->fNUsed, double(kMaxChi2PerCluster[0]));
2284 Float_t minn = besttrack->GetNumberOfClusters()-3;
2285 Int_t accepted=0;
2286 for (Int_t i=0;i<entries;i++){
15dd636f 2287 AliITStrackMI * track = (AliITStrackMI*)array->At(index[i]);
e43c066c 2288 if (!track) continue;
2289 if (accepted>maxcut) break;
2290 track->fChi2MIP[0] = GetNormalizedChi2(track,mode);
2291 if (track->GetNumberOfClusters()<6 && (track->fChi2MIP[0]+track->fNUsed>minchi2)){
2292 delete array->RemoveAt(index[i]);
2293 continue;
2294 }
2295 if (track->fChi2MIP[0]+track->fNUsed<minchi2 && track->GetNumberOfClusters()>=minn){
2296 accepted++;
2297 //
2298 newarray->AddLast(array->RemoveAt(index[i]));
2299 for (Int_t i=0;i<6;i++){
2300 if (nz[i]==0){
2301 erry[i] = track->fSigmaY[i]; erry[i+6] = track->fSigmaY[i+6];
2302 errz[i] = track->fSigmaZ[i]; errz[i] = track->fSigmaZ[i+6];
2303 ny[i] = track->fNy[i];
2304 nz[i] = track->fNz[i];
2305 }
2306 }
2307 }
2308 else{
2309 delete array->RemoveAt(index[i]);
2310 }
2311 }
2312 array->Delete();
2313 delete fTrackHypothesys.RemoveAt(esdindex);
2314 fTrackHypothesys.AddAt(newarray,esdindex);
2315 }
2316 else{
2317 array->Delete();
2318 delete fTrackHypothesys.RemoveAt(esdindex);
2319 }
2320 }
2321 delete [] chi2;
2322 delete [] index;
2323}
2324
2325
2326
15dd636f 2327AliITStrackMI * AliITStrackerMI::GetBestHypothesys(Int_t esdindex, AliITStrackMI * original, Int_t checkmax)
e43c066c 2328{
2329 //-------------------------------------------------------------
2330 // try to find best hypothesy
2331 // currently - minimal chi2 of track+backpropagated track+matching to the tpc track
2332 //-------------------------------------------------------------
2333 if (fTrackHypothesys.GetEntriesFast()<=esdindex) return 0;
2334 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2335 if (!array) return 0;
2336 Int_t entries = array->GetEntriesFast();
2337 if (!entries) return 0;
2338 Float_t minchi2 = 100000;
15dd636f 2339 AliITStrackMI * besttrack=0;
e43c066c 2340 //
15dd636f 2341 AliITStrackMI * backtrack = new AliITStrackMI(*original);
2342 AliITStrackMI * forwardtrack = new AliITStrackMI(*original);
e43c066c 2343 //
2344 for (Int_t i=0;i<entries;i++){
15dd636f 2345 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
e43c066c 2346 if (!track) continue;
2347 track->fChi2MIP[1] = 1000000;
2348 track->fChi2MIP[2] = 1000000;
2349 track->fChi2MIP[3] = 1000000;
2350 //
2351 // backtrack
15dd636f 2352 backtrack = new(backtrack) AliITStrackMI(*track);
e43c066c 2353 backtrack->ResetCovariance();
2354 backtrack->ResetCovariance();
2355 backtrack->ResetClusters();
2356 Double_t x = original->GetX();
2357 if (!RefitAt(x,backtrack,track)) continue;
2358 track->fChi2MIP[1] = NormalizedChi2(backtrack,0);
2359 //for (Int_t i=2;i<6;i++){track->fDy[i]+=backtrack->fDy[i]; track->fDz[i]+=backtrack->fDz[i];}
2360 if (track->fChi2MIP[1]>kMaxChi2PerCluster[1]*6.) continue;
2361 track->fChi22 = GetMatchingChi2(backtrack,original);
2362
2363 if ((track->fConstrain) && track->fChi22>90.) continue;
2364 if ((!track->fConstrain) && track->fChi22>30.) continue;
2365 if ( track->fChi22/track->GetNumberOfClusters()>11.) continue;
2366
2367
2368 if (!(track->fConstrain)&&track->fChi2MIP[1]>kMaxChi2PerCluster[1]) continue;
2369 Bool_t isOK=kTRUE;
2370 /*
2371 for (Int_t i=0;i<6;i++){
2372 if (track->fClIndex[i]>0){
2373 Double_t dy1 = (track->fDy[i]/track->fSigmaY[i]);
2374 Double_t dz1 = (track->fDz[i]/track->fSigmaZ[i]);
2375 Double_t dy2 = (backtrack->fDy[i]/backtrack->fSigmaY[i]);
2376 Double_t dz2 = (backtrack->fDz[i]/backtrack->fSigmaZ[i]);
2377 if (TMath::Min(dy1*dy1+dz1*dz1,dy2*dy2+dz2*dz2)> kMaxChi2sR[i]) isOK =kFALSE;
2378 track->fDy[i+6] = backtrack->fDy[i];
2379 track->fDz[i+6] = backtrack->fDz[i];
2380 track->fSigmaY[i+6] = backtrack->fSigmaY[i];
2381 track->fSigmaZ[i+6] = backtrack->fSigmaZ[i];
2382 }
2383 else{
2384 if (i==5){
2385 if (track->fClIndex[i-1]>0){
2386 Double_t dy2 = (backtrack->fDy[i-1]/backtrack->fSigmaY[i-1]);
2387 Double_t dz2 = (backtrack->fDz[i-1]/backtrack->fSigmaZ[i-1]);
2388 if (dy2*dy2+dz2*dz2> kMaxChi2sR[i]) isOK =kFALSE;
2389 }
2390 else isOK = kFALSE;
2391 }
2392 }
2393 }
2394 */
2395 if(!isOK) continue;
2396 //
2397 //forward track - without constraint
15dd636f 2398 forwardtrack = new(forwardtrack) AliITStrackMI(*original);
e43c066c 2399 forwardtrack->ResetClusters();
2400 x = track->GetX();
2401 if (!RefitAt(x,forwardtrack,track)) continue;
2402 track->fChi2MIP[2] = NormalizedChi2(forwardtrack,0);
2403 if (track->fChi2MIP[2]>kMaxChi2PerCluster[2]*6.0) continue;
2404 if (!(track->fConstrain)&&track->fChi2MIP[2]>kMaxChi2PerCluster[2]) continue;
2405
2406 track->fD[0] = forwardtrack->GetD(GetX(),GetY());
2407 track->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
2408 forwardtrack->fD[0] = track->fD[0];
2409 forwardtrack->fD[1] = track->fD[1];
2410 {
2411 Int_t list[6];
2412 AliITSclusterV2* clist[6];
2413 track->fChi2MIP[4] = GetNumberOfSharedClusters(track,esdindex,list,clist);
2414 if ( (!track->fConstrain) && track->fChi2MIP[4]>1.0) continue;
2415 }
2416
2417 track->fChi2MIP[3] = GetInterpolatedChi2(forwardtrack,backtrack);
2418 if ( (track->fChi2MIP[3]>6.*kMaxChi2PerCluster[3])) continue;
2419 if ( (!track->fConstrain) && (track->fChi2MIP[3]>2*kMaxChi2PerCluster[3])) {
2420 track->fChi2MIP[3]=1000;
2421 continue;
2422 }
2423 Double_t chi2 = track->fChi2MIP[0]+track->fNUsed;
2424 //
2425 for (Int_t ichi=0;ichi<5;ichi++){
2426 forwardtrack->fChi2MIP[ichi] = track->fChi2MIP[ichi];
2427 }
2428 if (chi2 < minchi2){
15dd636f 2429 //besttrack = new AliITStrackMI(*forwardtrack);
99c2ee26 2430 besttrack = track;
e43c066c 2431 besttrack->SetLabel(track->GetLabel());
2432 besttrack->fFakeRatio = track->fFakeRatio;
2433 minchi2 = chi2;
2434 original->fD[0] = forwardtrack->GetD(GetX(),GetY());
2435 original->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
2436 }
2437 }
2438 delete backtrack;
2439 delete forwardtrack;
2440 Int_t accepted=0;
2441 for (Int_t i=0;i<entries;i++){
15dd636f 2442 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
e43c066c 2443 if (!track) continue;
2444 if (accepted>checkmax || track->fChi2MIP[3]>kMaxChi2PerCluster[3]*6. ||
2445 (track->GetNumberOfClusters()<besttrack->GetNumberOfClusters()-1.)||
2446 track->fChi2MIP[0]>besttrack->fChi2MIP[0]+2.*besttrack->fNUsed+3.){
2447 delete array->RemoveAt(i);
2448 continue;
2449 }
2450 else{
2451 accepted++;
2452 }
2453 }
2454 //
2455 array->Compress();
2456 SortTrackHypothesys(esdindex,checkmax,1);
2457 array = (TObjArray*) fTrackHypothesys.At(esdindex);
15dd636f 2458 besttrack = (AliITStrackMI*)array->At(0);
e43c066c 2459 if (!besttrack) return 0;
2460 besttrack->fChi2MIP[8]=0;
2461 fBestTrackIndex[esdindex]=0;
2462 entries = array->GetEntriesFast();
15dd636f 2463 AliITStrackMI *longtrack =0;
e43c066c 2464 minchi2 =1000;
2465 Float_t minn=besttrack->GetNumberOfClusters()+besttrack->fNDeadZone;
2466 for (Int_t itrack=entries-1;itrack>0;itrack--){
15dd636f 2467 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2468 if (!track->fConstrain) continue;
2469 if (track->GetNumberOfClusters()+track->fNDeadZone<minn) continue;
2470 if (track->fChi2MIP[0]-besttrack->fChi2MIP[0]>0.0) continue;
2471 if (track->fChi2MIP[0]>4.) continue;
2472 minn = track->GetNumberOfClusters()+track->fNDeadZone;
2473 longtrack =track;
2474 }
2475 //if (longtrack) besttrack=longtrack;
2476
2477 Int_t list[6];
2478 AliITSclusterV2 * clist[6];
2479 Float_t shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
2480 if (besttrack->fConstrain&&besttrack->fChi2MIP[0]<kMaxChi2PerCluster[0]&&besttrack->fChi2MIP[1]<kMaxChi2PerCluster[1]
2481 &&besttrack->fChi2MIP[2]<kMaxChi2PerCluster[2]&&besttrack->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2482 //if (besttrack->fChi2MIP[0]<kMaxChi2PerCluster[0]&&besttrack->fChi2MIP[1]<kMaxChi2PerCluster[1]
2483 // &&besttrack->fChi2MIP[2]<kMaxChi2PerCluster[2]&&besttrack->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2484 RegisterClusterTracks(besttrack,esdindex);
2485 }
2486 //
2487 //
2488 if (shared>0.0){
2489 Int_t nshared;
2490 Int_t overlist[6];
2491 Int_t sharedtrack = GetOverlapTrack(besttrack, esdindex, nshared, list, overlist);
2492 if (sharedtrack>=0){
2493 //
2494 besttrack = GetBest2Tracks(esdindex,sharedtrack,10,5.5);
2495 if (besttrack){
2496 shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
2497 }
2498 else return 0;
2499 }
2500 }
2501
2502 if (shared>2.5) return 0;
2503 if (shared>1.0) return besttrack;
2504 //
2505 // don't sign clusters if not gold track
2506 Double_t deltad = besttrack->GetD(GetX(),GetY());
2507 Double_t deltaz = besttrack->GetZat(GetX()) - GetZ();
2508 Double_t deltaprim = TMath::Sqrt(deltad*deltad+deltaz*deltaz);
2509 if (deltaprim>0.1 && (fConstraint[fPass])) return besttrack;
2510 if (TMath::Abs(deltad)>0.1) return besttrack;
2511 if (TMath::Abs(deltaz)>0.1) return besttrack;
2512 if (besttrack->fChi2MIP[0]>4.) return besttrack;
2513 if (besttrack->fChi2MIP[1]>4.) return besttrack;
2514 if (besttrack->fChi2MIP[2]>4.) return besttrack;
2515 if (besttrack->fChi2MIP[3]>4.) return besttrack;
2516 if (fConstraint[fPass]){
2517 //
2518 // sign clusters
2519 //
2520 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
2521 for (Int_t i=0;i<6;i++){
2522 Int_t index = besttrack->fClIndex[i];
2523 if (index<=0) continue;
2524 Int_t ilayer = (index & 0xf0000000) >> 28;
2525 if (besttrack->fSigmaY[ilayer]<0.00000000001) continue;
2526 AliITSclusterV2 *c = (AliITSclusterV2*)GetCluster(index);
2527 if (!c) continue;
2528 if (ilayer>3&&c->GetNy()+c->GetNz()>6) continue;
2529 if ( (c->GetNy()+c->GetNz() )> ny[i]+nz[i]+0.7) continue; //shared track
2530 if ( c->GetNz()> nz[i]+0.7) continue; //shared track
2531 if ( ilayer>2&& besttrack->fNormQ[ilayer]/besttrack->fExpQ>1.5) continue;
2532 //if ( c->GetNy()> ny[i]+0.7) continue; //shared track
2533
2534 Bool_t cansign = kTRUE;
2535 for (Int_t itrack=0;itrack<entries; itrack++){
15dd636f 2536 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
e43c066c 2537 if (!track) continue;
2538 if (track->fChi2MIP[0]>besttrack->fChi2MIP[0]+2.*shared+1.) break;
2539 if ( (track->fClIndex[ilayer]>0) && (track->fClIndex[ilayer]!=besttrack->fClIndex[ilayer])){
2540 cansign = kFALSE;
2541 break;
2542 }
2543 }
2544 if (cansign){
2545 if (TMath::Abs(besttrack->fDy[ilayer]/besttrack->fSigmaY[ilayer])>3.) continue;
2546 if (TMath::Abs(besttrack->fDz[ilayer]/besttrack->fSigmaZ[ilayer])>3.) continue;
2547 if (!c->IsUsed()) c->Use();
2548 }
2549 }
2550 }
2551 return besttrack;
2552}
2553
2554
2555
2556void AliITStrackerMI::GetBestHypothesysMIP(TObjArray &itsTracks)
2557{
2558 //
2559 // get "best" hypothesys
2560 //for (Int_t ilayer=0;ilayer<6;ilayer++) fgLayers[ilayer].ResetWeights();
2561
2562
2563 Int_t nentries = itsTracks.GetEntriesFast();
2564 for (Int_t i=0;i<nentries;i++){
15dd636f 2565 AliITStrackMI* track = (AliITStrackMI*)itsTracks.At(i);
e43c066c 2566 if (!track) continue;
2567 TObjArray * array = (TObjArray*) fTrackHypothesys.At(i);
2568 if (!array) continue;
2569 if (array->GetEntriesFast()<=0) continue;
2570 //
15dd636f 2571 AliITStrackMI* longtrack=0;
e43c066c 2572 Float_t minn=0;
2573 Float_t maxchi2=1000;
2574 for (Int_t j=0;j<array->GetEntriesFast();j++){
15dd636f 2575 AliITStrackMI* track = (AliITStrackMI*)array->At(j);
e43c066c 2576 if (!track) continue;
2577 if (track->GetNumberOfClusters()+track->fNDeadZone<minn) continue;
2578 if (track->GetNumberOfClusters()+track->fNDeadZone>minn) maxchi2 = track->fChi2MIP[0];
2579 if (track->fChi2MIP[0]>maxchi2) continue;
2580 minn= track->GetNumberOfClusters()+track->fNDeadZone;
2581 maxchi2 = track->fChi2MIP[0];
2582 longtrack=track;
2583 break;
2584 }
15dd636f 2585 AliITStrackMI * besttrack = (AliITStrackMI*)array->At(0);
e43c066c 2586 if (!longtrack) {longtrack = besttrack;}
2587 else besttrack= longtrack;
2588 if (besttrack){
2589 Int_t list[6];
2590 AliITSclusterV2 * clist[6];
2591 Float_t shared = GetNumberOfSharedClusters(longtrack,i,list,clist);
2592 //
2593 track->fNUsed = shared;
2594 track->fNSkipped = besttrack->fNSkipped;
2595 track->fChi2MIP[0] = besttrack->fChi2MIP[0];
2596 if (shared>0){
2597 Int_t nshared;
2598 Int_t overlist[6];
2599 //
2600 Int_t sharedtrack = GetOverlapTrack(longtrack, i, nshared, list, overlist);
2601 //if (sharedtrack==-1) sharedtrack=0;
2602 if (sharedtrack>=0){
2603 besttrack = GetBest2Tracks(i,sharedtrack,10,5.5);
2604 }
2605 }
2606 if (besttrack&&fConstraint[fPass])
2607 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
2608 //if (besttrack&&besttrack->fConstrain)
2609 // UpdateESDtrack(besttrack,AliESDtrack::kITSin);
2610 if (besttrack->fChi2MIP[0]+besttrack->fNUsed>1.5){
2611 if ( (TMath::Abs(besttrack->fD[0])>0.1) && fConstraint[fPass]) {
2612 track->fReconstructed= kFALSE;
2613 }
2614 if ( (TMath::Abs(besttrack->fD[1])>0.1) && fConstraint[fPass]){
2615 track->fReconstructed= kFALSE;
2616 }
2617 }
2618
2619 }
2620 }
2621}
2622
2623
15dd636f 2624void AliITStrackerMI::CookLabel(AliITStrackMI *track,Float_t wrong) const {
e43c066c 2625 //--------------------------------------------------------------------
2626 //This function "cooks" a track label. If label<0, this track is fake.
2627 //--------------------------------------------------------------------
2628 Int_t tpcLabel=-1;
2629
2630 if ( track->fESDtrack) tpcLabel = TMath::Abs(track->fESDtrack->GetTPCLabel());
2631
2632 track->fChi2MIP[9]=0;
2633 Int_t nwrong=0;
2634 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
2635 Int_t cindex = track->GetClusterIndex(i);
2636 Int_t l=(cindex & 0xf0000000) >> 28;
2637 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(cindex);
2638 Int_t isWrong=1;
2639 for (Int_t ind=0;ind<3;ind++){
2640 if (tpcLabel>0)
2641 if (cl->GetLabel(ind)==tpcLabel) isWrong=0;
2642 }
2643 track->fChi2MIP[9]+=isWrong*(2<<l);
2644 nwrong+=isWrong;
2645 }
2646 track->fFakeRatio = double(nwrong)/double(track->GetNumberOfClusters());
2647 if (tpcLabel>0){
2648 if (track->fFakeRatio>wrong) track->fLab = -tpcLabel;
2649 else
2650 track->fLab = tpcLabel;
2651 }
2652
2653}
2654
2655
2656
15dd636f 2657void AliITStrackerMI::CookdEdx(AliITStrackMI* track)
e43c066c 2658{
2659 //
2660 //
2661 // Int_t list[6];
2662 //AliITSclusterV2 * clist[6];
2663 // Int_t shared = GetNumberOfSharedClusters(track,index,list,clist);
2664 Float_t dedx[4];
2665 Int_t accepted=0;
2666 track->fChi2MIP[9]=0;
2667 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
2668 Int_t cindex = track->GetClusterIndex(i);
2669 Int_t l=(cindex & 0xf0000000) >> 28;
2670 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(cindex);
2671 Int_t lab = TMath::Abs(track->fESDtrack->GetTPCLabel());
2672 Int_t isWrong=1;
2673 for (Int_t ind=0;ind<3;ind++){
2674 if (cl->GetLabel(ind)==lab) isWrong=0;
2675 }
2676 track->fChi2MIP[9]+=isWrong*(2<<l);
2677 if (l<2) continue;
2678 //if (l>3 && (cl->GetNy()>4) || (cl->GetNz()>4)) continue; //shared track
2679 //if (l>3&& !(cl->GetType()==1||cl->GetType()==10)) continue;
2680 //if (l<4&& !(cl->GetType()==1)) continue;
2681 dedx[accepted]= track->fdEdxSample[i];
2682 //dedx[accepted]= track->fNormQ[l];
2683 accepted++;
2684 }
2685 if (accepted<1) {
2686 track->SetdEdx(0);
2687 return;
2688 }
2689 Int_t indexes[4];
2690 TMath::Sort(accepted,dedx,indexes,kFALSE);
2691 Double_t low=0.;
2692 Double_t up=0.51;
2693 Double_t nl=low*accepted, nu =up*accepted;
2694 Float_t sumamp = 0;
2695 Float_t sumweight =0;
2696 for (Int_t i=0; i<accepted; i++) {
2697 Float_t weight =1;
2698 if (i<nl+0.1) weight = TMath::Max(1.-(nl-i),0.);
2699 if (i>nu-1) weight = TMath::Max(nu-i,0.);
2700 sumamp+= dedx[indexes[i]]*weight;
2701 sumweight+=weight;
2702 }
2703 track->SetdEdx(sumamp/sumweight);
2704}
2705
2706
2707void AliITStrackerMI::MakeCoeficients(Int_t ntracks){
2708 //
2709 //
2710 fCoeficients = new Float_t[ntracks*48];
2711 for (Int_t i=0;i<ntracks*48;i++) fCoeficients[i]=-1.;
2712}
2713
2714
15dd636f 2715Double_t AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSclusterV2 *cluster,Int_t layer)
e43c066c 2716{
2717 //
2718 //
2719 //
2720 Float_t erry,errz;
2721 Float_t theta = track->GetTgl();
2722 Float_t phi = track->GetSnp();
2723 phi = TMath::Sqrt(phi*phi/(1.-phi*phi));
2724 GetError(layer,cluster,theta,phi,track->fExpQ,erry,errz);
2725 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz);
2726 Float_t ny,nz;
2727 GetNTeor(layer,cluster, theta,phi,ny,nz);
2728 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
2729 if (delta>1){
2730 chi2+=0.5*TMath::Min(delta/2,2.);
2731 chi2+=2.*cluster->GetDeltaProbability();
2732 }
2733 //
2734 track->fNy[layer] =ny;
2735 track->fNz[layer] =nz;
2736 track->fSigmaY[layer] = erry;
2737 track->fSigmaZ[layer] = errz;
2738 //track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt(1+theta*theta+phi*phi);
2739 track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt((1.+ track->fP3*track->fP3)/(1.- track->fP2*track->fP2));
2740 return chi2;
2741
2742}
2743
15dd636f 2744Int_t AliITStrackerMI::UpdateMI(AliITStrackMI* track, const AliITSclusterV2* cl,Double_t chi2,Int_t index) const
e43c066c 2745{
2746 //
2747 //
2748 //
2749 Int_t layer = (index & 0xf0000000) >> 28;
2750 track->fClIndex[layer] = index;
2751 if ( (layer>1) &&track->fNormQ[layer]/track->fExpQ<0.5 ) {
2752 chi2+= (0.5-track->fNormQ[layer]/track->fExpQ)*10.;
2753 track->fdEdxMismatch+=(0.5-track->fNormQ[layer]/track->fExpQ)*10.;
2754 }
2755 return track->UpdateMI(cl->GetY(),cl->GetZ(),track->fSigmaY[layer],track->fSigmaZ[layer],chi2,index);
2756}
2757
2758void AliITStrackerMI::GetNTeor(Int_t layer, const AliITSclusterV2* /*cl*/, Float_t theta, Float_t phi, Float_t &ny, Float_t &nz)
2759{
2760 //
2761 //get "mean shape"
2762 //
2763 if (layer==0){
2764 ny = 1.+TMath::Abs(phi)*3.2;
2765 nz = 1.+TMath::Abs(theta)*0.34;
2766 return;
2767 }
2768 if (layer==1){
2769 ny = 1.+TMath::Abs(phi)*3.2;
2770 nz = 1.+TMath::Abs(theta)*0.28;
2771 return;
2772 }
2773
2774 if (layer>3){
2775 ny = 2.02+TMath::Abs(phi)*1.95;
2776 nz = 2.02+TMath::Abs(phi)*2.35;
2777 return;
2778 }
4c53440c 2779 ny = 6.6-2.7*TMath::Abs(phi);
e43c066c 2780 nz = 2.8-3.11*TMath::Abs(phi)+0.45*TMath::Abs(theta);
2781}
2782
2783
2784
2785Int_t AliITStrackerMI::GetError(Int_t layer, const AliITSclusterV2*cl, Float_t theta, Float_t phi,Float_t expQ, Float_t &erry, Float_t &errz)
2786{
2787 //calculate cluster position error
2788 //
2789 Float_t nz,ny;
2790 GetNTeor(layer, cl,theta,phi,ny,nz);
2791 erry = TMath::Sqrt(cl->GetSigmaY2());
2792 errz = TMath::Sqrt(cl->GetSigmaZ2());
2793 //
2794 // PIXELS
2795 if (layer<2){
2796
2797 if (TMath::Abs(ny-cl->GetNy())>0.6) {
2798 if (ny<cl->GetNy()){
2799 erry*=0.4+TMath::Abs(ny-cl->GetNy());
2800 errz*=0.4+TMath::Abs(ny-cl->GetNy());
2801 }else{
2802 erry*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
2803 errz*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
2804 }
2805 }
2806 if (TMath::Abs(nz-cl->GetNz())>1.) {
2807 erry*=TMath::Abs(nz-cl->GetNz());
2808 errz*=TMath::Abs(nz-cl->GetNz());
2809 }
2810 erry*=0.85;
2811 errz*=0.85;
2812 erry= TMath::Min(erry,float(0.005));
2813 errz= TMath::Min(errz,float(0.03));
2814 return 10;
2815 }
2816
2817//STRIPS
2818 if (layer>3){
2819 if (cl->GetNy()==100||cl->GetNz()==100){
2820 erry = 0.004;
2821 errz = 0.2;
2822 return 100;
2823 }
2824 if (cl->GetNy()+cl->GetNz()>12){
2825 erry = 0.06;
2826 errz = 0.57;
2827 return 100;
2828 }
2829 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
2830 Float_t chargematch = TMath::Max(double(normq/expQ),2.);
2831 //
2832 if (cl->GetType()==1 || cl->GetType()==10 ){
2833 if (chargematch<1.0 || (cl->GetNy()+cl->GetNz()<nz+ny+0.5)){
2834 errz = 0.043;
2835 erry = 0.00094;
2836 return 101;
2837 }
2838 if (cl->GetNy()+cl->GetNz()<nz+ny+1.2){
2839 errz = 0.06;
2840 erry =0.0013;
2841 return 102;
2842 }
2843 erry = 0.0027;
2844 errz = TMath::Min(0.028*(chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.15);
2845 return 103;
2846 }
2847 if (cl->GetType()==2 || cl->GetType()==11 ){
2848 erry = TMath::Min(0.0010*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.05);
2849 errz = TMath::Min(0.025*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.5);
2850 return 104;
2851 }
2852
2853 if (cl->GetType()>100 ){
2854 if ((chargematch+cl->GetNy()+cl->GetNz()-nz-ny<1.5)){
2855 errz = 0.05;
2856 erry = 0.00096;
2857 return 105;
2858 }
2859 if (cl->GetNy()+cl->GetNz()-nz-ny<1){
2860 errz = 0.10;
2861 erry = 0.0025;
2862 return 106;
2863 }
2864
2865 errz = TMath::Min(0.05*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.4);
2866 erry = TMath::Min(0.003*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.05);
2867 return 107;
2868 }
2869 Float_t diff = cl->GetNy()+cl->GetNz()-ny-nz;
2870 if (diff<1) diff=1;
2871 if (diff>4) diff=4;
2872
2873 if (cl->GetType()==5||cl->GetType()==6||cl->GetType()==7||cl->GetType()==8){
2874 errz = 0.14*diff;
2875 erry = 0.003*diff;
2876 return 108;
2877 }
2878 erry = 0.04*diff;
2879 errz = 0.06*diff;
2880 return 109;
2881 }
2882 //DRIFTS
2883 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
2884 Float_t chargematch = normq/expQ;
2885 Float_t factorz=1;
2886 Int_t cnz = cl->GetNz()%10;
2887 //charge match
2888 if (cl->GetType()==1){
2889 if (chargematch<1.25){
2890 erry = 0.0028*(1.+6./cl->GetQ()); // gold clusters
2891 }
2892 else{
2893 erry = 0.003*chargematch;
2894 if (cl->GetNz()==3) erry*=1.5;
2895 }
2896 if (chargematch<1.0){
2897 errz = 0.0011*(1.+6./cl->GetQ());
2898 }
2899 else{
2900 errz = 0.002*(1+2*(chargematch-1.));
2901 }
2902 if (cnz>nz+0.6) {
2903 erry*=(cnz-nz+0.5);
2904 errz*=1.4*(cnz-nz+0.5);
2905 }
2906 }
2907 if (cl->GetType()>1){
2908 if (chargematch<1){
2909 erry = 0.00385*(1.+6./cl->GetQ()); // gold clusters
2910 errz = 0.0016*(1.+6./cl->GetQ());
2911 }
2912 else{
2913 errz = 0.0014*(1+3*(chargematch-1.));
2914 erry = 0.003*(1+3*(chargematch-1.));
2915 }
2916 if (cnz>nz+0.6) {
2917 erry*=(cnz-nz+0.5);
2918 errz*=1.4*(cnz-nz+0.5);
2919 }
2920 }
2921
2922 if (TMath::Abs(cl->GetY())>2.5){
2923 factorz*=1+2*(TMath::Abs(cl->GetY())-2.5);
2924 }
2925 if (TMath::Abs(cl->GetY())<1){
2926 factorz*=1.+0.5*TMath::Abs(TMath::Abs(cl->GetY())-1.);
2927 }
2928 factorz= TMath::Min(factorz,float(4.));
2929 errz*=factorz;
2930
2931 erry= TMath::Min(erry,float(0.05));
2932 errz= TMath::Min(errz,float(0.05));
2933 return 200;
2934}
2935
2936
2937
2938void AliITStrackerMI::SignDeltas( TObjArray *ClusterArray, Float_t vz)
2939{
2940 //
2941 //
2942 Int_t entries = ClusterArray->GetEntriesFast();
2943 if (entries<4) return;
2944 AliITSclusterV2* cluster = (AliITSclusterV2*)ClusterArray->At(0);
2945 Int_t layer = cluster->GetLayer();
2946 if (layer>1) return;
2947 Int_t index[10000];
2948 Int_t ncandidates=0;
2949 Float_t r = (layer>0)? 7:4;
2950 //
2951 for (Int_t i=0;i<entries;i++){
2952 AliITSclusterV2* cl0 = (AliITSclusterV2*)ClusterArray->At(i);
2953 Float_t nz = 1+TMath::Abs((cl0->GetZ()-vz)/r);
2954 if (cl0->GetNy()+cl0->GetNz()<=5+2*layer+nz) continue;
2955 index[ncandidates] = i; //candidate to belong to delta electron track
2956 ncandidates++;
2957 if (cl0->GetNy()+cl0->GetNz()>9+2*layer+nz) {
2958 cl0->SetDeltaProbability(1);
2959 }
2960 }
2961 //
2962 //
2963 //
2964 for (Int_t i=0;i<ncandidates;i++){
2965 AliITSclusterV2* cl0 = (AliITSclusterV2*)ClusterArray->At(index[i]);
2966 if (cl0->GetDeltaProbability()>0.8) continue;
2967 //
2968 Int_t ncl = 0;
2969 Float_t y[100],z[100],sumy,sumz,sumy2, sumyz, sumw;
2970 sumy=sumz=sumy2=sumyz=sumw=0.0;
2971 for (Int_t j=0;j<ncandidates;j++){
2972 if (i==j) continue;
2973 AliITSclusterV2* cl1 = (AliITSclusterV2*)ClusterArray->At(index[j]);
2974 //
2975 Float_t dz = cl0->GetZ()-cl1->GetZ();
2976 Float_t dy = cl0->GetY()-cl1->GetY();
2977 if (TMath::Sqrt(dz*dz+dy*dy)<0.2){
2978 Float_t weight = cl1->GetNy()+cl1->GetNz()-2;
2979 y[ncl] = cl1->GetY();
2980 z[ncl] = cl1->GetZ();
2981 sumy+= y[ncl]*weight;
2982 sumz+= z[ncl]*weight;
2983 sumy2+=y[ncl]*y[ncl]*weight;
2984 sumyz+=y[ncl]*z[ncl]*weight;
2985 sumw+=weight;
2986 ncl++;
2987 }
2988 }
2989 if (ncl<4) continue;
2990 Float_t det = sumw*sumy2 - sumy*sumy;
2991 Float_t delta=1000;
2992 if (TMath::Abs(det)>0.01){
2993 Float_t z0 = (sumy2*sumz - sumy*sumyz)/det;
2994 Float_t k = (sumyz*sumw - sumy*sumz)/det;
2995 delta = TMath::Abs(cl0->GetZ()-(z0+k*cl0->GetY()));
2996 }
2997 else{
2998 Float_t z0 = sumyz/sumy;
2999 delta = TMath::Abs(cl0->GetZ()-z0);
3000 }
3001 if ( delta<0.05) {
3002 cl0->SetDeltaProbability(1-20.*delta);
3003 }
3004 }
3005}
3006
3007
15dd636f 3008void AliITStrackerMI::UpdateESDtrack(AliITStrackMI* track, ULong_t flags) const
e43c066c 3009{
3010 //
3011 //
3012 track->UpdateESDtrack(flags);
15dd636f 3013 AliITStrackMI * oldtrack = (AliITStrackMI*)(track->fESDtrack->GetITStrack());
99c2ee26 3014 if (oldtrack) delete oldtrack;
15dd636f 3015 track->fESDtrack->SetITStrack(new AliITStrackMI(*track));
e43c066c 3016}
3017
3018
3019
3020
51ad6848 3021
3022
3023
3024
3025void AliITStrackerMI::FindV0(AliESD *event)
e43c066c 3026{
3027 //
3028 // fast V0 finder
3029 //
51ad6848 3030 //fV0Array->Clean();
4661fe35 3031 AliHelix * helixes = new AliHelix[30000];
e43c066c 3032 TObjArray trackarray(30000);
3033 Float_t dist[30000];
51ad6848 3034 Float_t mindist[30000];
3035 AliESDV0MI *vertexarray = new AliESDV0MI[20000];
3036 AliV0vertex *oldvertexarray = new AliV0vertex[20000];
3037 AliESDV0MI *pvertex = &vertexarray[0];
3038
3039
e43c066c 3040 //
3041 Int_t entries = fTrackHypothesys.GetEntriesFast();
3042 for (Int_t i=0;i<entries;i++){
3043 TObjArray * array = (TObjArray*)fTrackHypothesys.At(i);
3044 if (!array) continue;
15dd636f 3045 AliITStrackMI * track = (AliITStrackMI*)array->At(fBestTrackIndex[i]);
e43c066c 3046 if (track){
3047 dist[i] = TMath::Sqrt(track->fD[0]*track->fD[0]+track->fD[1]*track->fD[1]);
51ad6848 3048 Float_t pt1 = TMath::Abs(track->fP4*track->GetConvConst());
3049 mindist[i] = TMath::Min(0.02+0.03*pt1,0.15);
3050 if (mindist[i]<0.05) mindist[i]=0.05;
e43c066c 3051 trackarray.AddAt(track,i);
3052 new (&helixes[i]) AliHelix(*track);
3053 }
3054 }
51ad6848 3055 // Int_t multifound=0;
3056 Int_t vertexall =0;
3057 AliESDV0MI tempvertex;
3058 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
3059
e43c066c 3060 for (Int_t itrack0=0;itrack0<entries;itrack0++){
15dd636f 3061 AliITStrackMI * track0 = (AliITStrackMI*)trackarray.At(itrack0);
e43c066c 3062 if (!track0) continue;
51ad6848 3063 if (track0->fP4>0) continue;
3064 if (dist[itrack0]<mindist[itrack0]) continue;
3065 Int_t vertexes =0;
3066 //
3067 for (Int_t itrack1=0;itrack1<entries;itrack1++){
15dd636f 3068 AliITStrackMI * track1 = (AliITStrackMI*)trackarray.At(itrack1);
e43c066c 3069 if (!track1) continue;
51ad6848 3070 if (track1->fP4<0) continue;
3071 if (dist[itrack1]<mindist[itrack1]) continue;
3072 //
e43c066c 3073 AliHelix *h1 = &helixes[itrack0];
51ad6848 3074 AliHelix *h2 = &helixes[itrack1];
3075 Double_t distance = TestV0(h1,h2,pvertex);
e43c066c 3076 if (distance>0.4) continue;
51ad6848 3077 //
3078 if (distance>0.3*(dist[itrack1]+dist[itrack0])) continue;
3079 //if (distance>0.2*dist[itrack0]) continue;
0703142d 3080 if (pvertex->GetRr()<0.3*(dist[itrack1]+dist[itrack0])) continue;
3081 if (pvertex->GetRr()>27) continue;
51ad6848 3082 pvertex->SetM(*track0);
3083 pvertex->SetP(*track1);
3084 pvertex->Update(primvertex);
3085 //
3086 //
0703142d 3087 if (pvertex->GetPointAngle()<0.85) continue;
51ad6848 3088 //
3089 //
0703142d 3090 pvertex->SetLab(0,track0->GetLabel());
3091 pvertex->SetLab(1,track1->GetLabel());
3092 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
3093 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
51ad6848 3094 // calculate chi2s
3095 //
0703142d 3096 pvertex->SetChi2After(0);
3097 pvertex->SetChi2Before(0);
3098 pvertex->SetNBefore(0);
3099 pvertex->SetNAfter(0);
e43c066c 3100
51ad6848 3101 for (Int_t i=0;i<6;i++){
3102 Float_t radius = fgLayers[i].GetR();
0703142d 3103 if (pvertex->GetRr()>radius+0.5){
3104 pvertex->SetNBefore(pvertex->GetNBefore()+2.);
51ad6848 3105 //
3106 if (track0->fClIndex[i]<=0) {
0703142d 3107 pvertex->SetChi2Before(pvertex->GetChi2Before()+9);
51ad6848 3108 }else{
3109 Float_t chi2 = track0->fDy[i]*track0->fDy[i]/(track0->fSigmaY[i]*track0->fSigmaY[i])+
3110 track0->fDz[i]*track0->fDz[i]/(track0->fSigmaZ[i]*track0->fSigmaZ[i]);
0703142d 3111 pvertex->SetChi2Before(pvertex->GetChi2Before()+chi2);
51ad6848 3112 }
3113
3114 if (track1->fClIndex[i]<=0) {
0703142d 3115 pvertex->SetChi2Before(pvertex->GetChi2Before()+9);
51ad6848 3116 }else{
3117 Float_t chi2 = track1->fDy[i]*track1->fDy[i]/(track1->fSigmaY[i]*track1->fSigmaY[i])+
3118 track1->fDz[i]*track1->fDz[i]/(track1->fSigmaZ[i]*track1->fSigmaZ[i]);
0703142d 3119 pvertex->SetChi2Before(pvertex->GetChi2Before()+chi2);
51ad6848 3120 }
3121 }
3122
0703142d 3123 if (pvertex->GetRr()<radius-0.5){
3124 pvertex->SetNAfter(pvertex->GetNAfter()+2.);
51ad6848 3125 //
3126 if (track0->fClIndex[i]<=0) {
0703142d 3127 pvertex->SetChi2After(pvertex->GetChi2After()+9);
51ad6848 3128 }else{
3129 Float_t chi2 = track0->fDy[i]*track0->fDy[i]/(track0->fSigmaY[i]*track0->fSigmaY[i])+
3130 track0->fDz[i]*track0->fDz[i]/(track0->fSigmaZ[i]*track0->fSigmaZ[i]);
0703142d 3131 pvertex->SetChi2After(pvertex->GetChi2After()+chi2);
51ad6848 3132 }
3133
3134 if (track1->fClIndex[i]<=0) {
0703142d 3135 pvertex->SetChi2After(pvertex->GetChi2After()+9);
51ad6848 3136 }else{
3137 Float_t chi2 = track1->fDy[i]*track1->fDy[i]/(track1->fSigmaY[i]*track1->fSigmaY[i])+
3138 track1->fDz[i]*track1->fDz[i]/(track1->fSigmaZ[i]*track1->fSigmaZ[i]);
0703142d 3139 pvertex->SetChi2After(pvertex->GetChi2After()+chi2);
51ad6848 3140 }
3141 }
e43c066c 3142 }
0703142d 3143 if (pvertex->GetNBefore()>2){
3144 if (pvertex->GetChi2Before()/pvertex->GetNBefore()<4.) continue; //have clusters before vetex
51ad6848 3145 }
3146 distance = FindBestPair(itrack0,itrack1,pvertex);
0703142d 3147 if (pvertex->GetPointAngle()<0.85) continue;
51ad6848 3148 //
3149 if (distance>0.3) continue;
0703142d 3150 // if (pvertex->GetDistSigma()*6>pvertex->GetRr()) continue;
3151 // if (pvertex->GetDistSigma()>0.4) continue;
3152 //if (pvertex->GetDistNorm()>5.5) continue;
51ad6848 3153 new (&oldvertexarray[vertexall]) AliV0vertex(*track0,*track1) ;
3154 vertexes++;
3155 vertexall++;
3156 pvertex = &vertexarray[vertexall];
3157 }
3158 }
3159 // printf("\n\n\nMultifound\t%d\n\n\n",multifound);
3160 //
3161 // sort vertices according quality
3162 Float_t quality[10000];
3163 Int_t indexes[10000];
3164 Int_t trackvertices[30000];
3165 for (Int_t i=0;i<entries;i++) trackvertices[i]=0;
0703142d 3166 for (Int_t i=0;i<vertexall;i++) quality[i] = 1.-vertexarray[i].GetPointAngle();
51ad6848 3167 TMath::Sort(vertexall,quality,indexes,kFALSE);
3168
3169 for (Int_t i=0;i<vertexall;i++){
3170 pvertex= &vertexarray[indexes[i]];
0703142d 3171 Int_t index0 = vertexarray[indexes[i]].GetIndex(0);
3172 Int_t index1 = vertexarray[indexes[i]].GetIndex(1);
3173 vertexarray[indexes[i]].SetOrder(2,i);
3174 vertexarray[indexes[i]].SetOrder(1,trackvertices[index1]);
3175 vertexarray[indexes[i]].SetOrder(0,trackvertices[index0]);
51ad6848 3176 if (trackvertices[index1]+trackvertices[index0]>2) continue;
3177 if (trackvertices[index1]+trackvertices[index0]>0) {
0703142d 3178 // if (pvertex->GetPointAngle()<0.995) continue;
51ad6848 3179 }
3180 trackvertices[index0]++;
3181 trackvertices[index1]++;
3182
3183 // event->AddV0(&oldvertexarray[indexes[i]]);
3184 Int_t v0index = event->AddV0MI(&vertexarray[indexes[i]]);
0703142d 3185 AliESDtrack * ptrack0 = event->GetTrack(vertexarray[indexes[i]].GetIndex(0));
3186 AliESDtrack * ptrack1 = event->GetTrack(vertexarray[indexes[i]].GetIndex(1));
51ad6848 3187 if (!ptrack0 || !ptrack1){
3188 printf("BBBBBBBUUUUUUUUUUGGGGGGGGGG\n");
3189 }
3190 Int_t v0index0[3]={ptrack0->GetV0Index(0),ptrack0->GetV0Index(1),ptrack0->GetV0Index(2)};
3191 Int_t v0index1[3]={ptrack1->GetV0Index(0),ptrack1->GetV0Index(1),ptrack1->GetV0Index(2)};
3192 for (Int_t i=0;i<3;i++){
3193 if (v0index0[i]<0) {
3194 v0index0[i]=v0index;
3195 ptrack0->SetV0Indexes(v0index0);
3196 break;
e43c066c 3197 }
51ad6848 3198 }
3199 for (Int_t i=0;i<3;i++){
3200 if (v0index1[i]<0) {
3201 v0index1[i]=v0index;
3202 ptrack1->SetV0Indexes(v0index1);
3203 break;
e43c066c 3204 }
51ad6848 3205 }
e43c066c 3206 }
4661fe35 3207 delete[] helixes;
51ad6848 3208 delete[] vertexarray;
3209 delete[] oldvertexarray;
e43c066c 3210}
3211
51ad6848 3212
3213Double_t AliITStrackerMI::FindBestPair(Int_t esdtrack0, Int_t esdtrack1, AliESDV0MI *vertex)
e43c066c 3214{
3215 //
3216 // try to find best pair from the tree of track hyp.
3217 //
3218 TObjArray * array0 = (TObjArray*)fTrackHypothesys.At(esdtrack0);
3219 Int_t entries0 = array0->GetEntriesFast();
3220 TObjArray * array1 = (TObjArray*)fTrackHypothesys.At(esdtrack1);
3221 Int_t entries1 = array1->GetEntriesFast();
51ad6848 3222 // Float_t primvertex[3]={GetX(),GetY(),GetZ()};
e43c066c 3223 //
3224 //
51ad6848 3225 //AliESDV0MI v0;
0703142d 3226 Double_t criticalradius = vertex->GetRr();
e43c066c 3227 //
51ad6848 3228 AliITStrackMI * track0= (AliITStrackMI*)array0->At(fBestTrackIndex[esdtrack0]);
3229 AliITStrackMI * track1= (AliITStrackMI*)array1->At(fBestTrackIndex[esdtrack1]);
3230 //
3231 // find the best tracks after decay point
e43c066c 3232 for (Int_t itrack0=0;itrack0<entries0;itrack0++){
51ad6848 3233 AliITStrackMI * track = (AliITStrackMI*)array0->At(itrack0);
3234 if (!track) continue;
3235 if (track->fX<criticalradius-1) continue;
3236 if (track->fX>criticalradius){
3237 track0 = track;
3238 break;
e43c066c 3239 }
3240 }
e43c066c 3241
51ad6848 3242 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
3243 AliITStrackMI * track = (AliITStrackMI*)array1->At(itrack1);
3244 if (!track) continue;
3245 if (track->fX<criticalradius-1) continue;
3246 if (track->fX>criticalradius){
3247 track1 = track;
3248 break;
3249 }
3250 }
3251 //propagate to vertex
0703142d 3252 Double_t alpha = TMath::ATan2(vertex->GetXr(1),vertex->GetXr(0));
3253 Double_t radius =TMath::Sqrt(vertex->GetXr(1)*vertex->GetXr(1)+vertex->GetXr(0)*vertex->GetXr(0));
51ad6848 3254 AliITStrackMI track0p = *track0;
3255 AliITStrackMI track1p = *track1;
3256 if (!track0p.Propagate(alpha,radius)) return 100000;
3257 if (!track1p.Propagate(alpha,radius)) return 100000;
3258 //track0p.Propagate(alpha,radius);
3259 //track1p.Propagate(alpha,radius);
3260 //
3261 //
3262 //vertex2->SetM(track0p);
3263 //vertex2->SetP(track1p);
3264 //vertex2->Update(primvertex);
3265 //
3266 AliHelix h0(track0p);
3267 AliHelix h1(track1p);
3268 Double_t distance = TestV0(&h0,&h1,vertex);
3269 Float_t v[3]={GetX(),GetY(),GetZ()};
3270 // vertex->Update(v,track0->fMass, track1->fMass);
3271 vertex->SetM(*track0);
3272 vertex->SetP(*track1);
3273 vertex->Update(v);
3274 Float_t sigma = TMath::Sqrt(track1p.GetSigmaY2()+track1p.GetSigmaZ2()+track0p.GetSigmaY2()+track0p.GetSigmaZ2());
0703142d 3275 vertex->SetDistNorm(distance/sigma);
3276 vertex->SetDistSigma(sigma);
51ad6848 3277 return distance;
e43c066c 3278}
3279
3280
3281
51ad6848 3282Double_t AliITStrackerMI::TestV0(AliHelix *helix1, AliHelix *helix2, AliESDV0MI *vertex)
e43c066c 3283{
3284 //
3285 // test the helixes for the distnce calculate vertex characteristic
3286 //
3287 Float_t distance1,distance2;
3288 AliHelix & dhelix1 = *helix1;
3289 Double_t pp[3],xx[3];
3290 dhelix1.GetMomentum(0,pp,0);
3291 dhelix1.Evaluate(0,xx);
3292 AliHelix &mhelix = *helix2;
3293 //
3294 //find intersection linear
3295 //
3296 Double_t phase[2][2],radius[2];
3297 Int_t points = dhelix1.GetRPHIintersections(mhelix, phase, radius);
3298 Double_t delta1=10000,delta2=10000;
3299
3300 if (points>0){
3301 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
3302 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
3303 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
3304 }
3305 if (points==2){
3306 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
3307 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
3308 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
3309 }
3310 distance1 = TMath::Min(delta1,delta2);
0703142d 3311 vertex->SetDist1(TMath::Sqrt(distance1));
e43c066c 3312 //
3313 //find intersection parabolic
3314 //
3315 points = dhelix1.GetRPHIintersections(mhelix, phase, radius);
3316 delta1=10000,delta2=10000;
3317
3318 if (points>0){
3319 dhelix1.ParabolicDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
3320 }
3321 if (points==2){
3322 dhelix1.ParabolicDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
3323 }
3324
3325 distance2 = TMath::Min(delta1,delta2);
0703142d 3326 vertex->SetDist2(TMath::Sqrt(distance2));
e43c066c 3327 if (distance2<100){
3328 if (delta1<delta2){
3329 //get V0 info
0703142d 3330 dhelix1.Evaluate(phase[0][0],vertex->GetXrp());
3331 dhelix1.GetMomentum(phase[0][0],vertex->GetPPp());
3332 mhelix.GetMomentum(phase[0][1],vertex->GetPMp());
3333 dhelix1.GetAngle(phase[0][0],mhelix,phase[0][1],vertex->GetAnglep());
3334 vertex->SetRr(TMath::Sqrt(radius[0]));
e43c066c 3335 }
3336 else{
0703142d 3337 dhelix1.Evaluate(phase[1][0],vertex->GetXrp());
3338 dhelix1.GetMomentum(phase[1][0],vertex->GetPPp());
3339 mhelix.GetMomentum(phase[1][1],vertex->GetPMp());
3340 dhelix1.GetAngle(phase[1][0],mhelix,phase[1][1],vertex->GetAnglep());
3341 vertex->SetRr(TMath::Sqrt(radius[1]));
e43c066c 3342 }
3343 }
3344 //
3345 //
0703142d 3346 return vertex->GetDist2();
e43c066c 3347}
3348
51ad6848 3349
3350
3351
3352
3353
3354