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Error in ZDC positiong corrected
[u/mrichter/AliRoot.git] / ITS / AliITStrackerMI.cxx
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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]);
304864ab 245 if (t->GetMass()<0.13) t->SetMass(AliPID::ParticleMass(AliPID::kPion)); // MI look to the esd - mass hypothesys !!!!!!!!!!!
e43c066c 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;
1d4090b7 874 fClusters[fN]=c;
875 fN++;
e43c066c 876 AliITSdetector &det=GetDetector(c->GetDetectorIndex());
e43c066c 877 if (c->GetY()<det.GetYmin()) det.SetYmin(c->GetY());
878 if (c->GetY()>det.GetYmax()) det.SetYmax(c->GetY());
879 if (c->GetZ()<det.GetZmin()) det.SetZmin(c->GetZ());
880 if (c->GetZ()>det.GetZmax()) det.SetZmax(c->GetZ());
881
882 return 0;
883}
884
885void AliITStrackerMI::AliITSlayer::SortClusters()
886{
887 //
888 //sort clusters
889 //
1d4090b7 890 AliITSclusterV2 **clusters = new AliITSclusterV2*[fN];
891 Float_t *z = new Float_t[fN];
892 Int_t * index = new Int_t[fN];
893 //
894 for (Int_t i=0;i<fN;i++){
895 z[i] = fClusters[i]->GetZ();
896 }
897 TMath::Sort(fN,z,index,kFALSE);
898 for (Int_t i=0;i<fN;i++){
899 clusters[i] = fClusters[index[i]];
900 }
901 //
902 for (Int_t i=0;i<fN;i++){
903 fClusters[i] = clusters[i];
904 fZ[i] = fClusters[i]->GetZ();
905 AliITSdetector &det=GetDetector(fClusters[i]->GetDetectorIndex());
906 Double_t y=fR*det.GetPhi() + fClusters[i]->GetY();
907 if (y>2.*fR*TMath::Pi()) y -= 2.*fR*TMath::Pi();
908 fY[i] = y;
909 }
910 delete[] index;
911 delete[] z;
912 delete[] clusters;
913 //
914
e43c066c 915 fYB[0]=10000000;
916 fYB[1]=-10000000;
917 for (Int_t i=0;i<fN;i++){
918 if (fY[i]<fYB[0]) fYB[0]=fY[i];
919 if (fY[i]>fYB[1]) fYB[1]=fY[i];
920 fClusterIndex[i] = i;
921 }
922 //
923 // fill slices
924 fDy5 = (fYB[1]-fYB[0])/5.;
925 fDy10 = (fYB[1]-fYB[0])/10.;
926 fDy20 = (fYB[1]-fYB[0])/20.;
927 for (Int_t i=0;i<6;i++) fN5[i] =0;
928 for (Int_t i=0;i<11;i++) fN10[i]=0;
929 for (Int_t i=0;i<21;i++) fN20[i]=0;
930 //
931 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;}
932 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;}
933 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;}
934 //
935 //
1d4090b7 936 for (Int_t i=0;i<fN;i++)
937 for (Int_t irot=-1;irot<=1;irot++){
938 Float_t curY = fY[i]+irot*TMath::TwoPi()*fR;
939 // slice 5
940 for (Int_t slice=0; slice<6;slice++){
941 if (fBy5[slice][0]<curY && curY<fBy5[slice][1]&&fN5[slice]<kMaxClusterPerLayer5){
942 fClusters5[slice][fN5[slice]] = fClusters[i];
943 fY5[slice][fN5[slice]] = curY;
944 fZ5[slice][fN5[slice]] = fZ[i];
945 fClusterIndex5[slice][fN5[slice]]=i;
946 fN5[slice]++;
947 }
e43c066c 948 }
1d4090b7 949 // slice 10
950 for (Int_t slice=0; slice<11;slice++){
951 if (fBy10[slice][0]<curY && curY<fBy10[slice][1]&&fN10[slice]<kMaxClusterPerLayer10){
952 fClusters10[slice][fN10[slice]] = fClusters[i];
953 fY10[slice][fN10[slice]] = curY;
954 fZ10[slice][fN10[slice]] = fZ[i];
955 fClusterIndex10[slice][fN10[slice]]=i;
956 fN10[slice]++;
957 }
e43c066c 958 }
1d4090b7 959 // slice 20
960 for (Int_t slice=0; slice<21;slice++){
961 if (fBy20[slice][0]<curY && curY<fBy20[slice][1]&&fN20[slice]<kMaxClusterPerLayer20){
962 fClusters20[slice][fN20[slice]] = fClusters[i];
963 fY20[slice][fN20[slice]] = curY;
964 fZ20[slice][fN20[slice]] = fZ[i];
965 fClusterIndex20[slice][fN20[slice]]=i;
966 fN20[slice]++;
967 }
968 }
e43c066c 969 }
1d4090b7 970
971 //
972 // consistency check
973 //
974 for (Int_t i=0;i<fN-1;i++){
975 if (fZ[i]>fZ[i+1]){
976 printf("Bugg\n");
e43c066c 977 }
978 }
1d4090b7 979 //
980 for (Int_t slice=0;slice<21;slice++)
981 for (Int_t i=0;i<fN20[slice]-1;i++){
982 if (fZ20[slice][i]>fZ20[slice][i+1]){
983 printf("Bugg\n");
984 }
985 }
986
987
e43c066c 988}
989
990
991
992
993Int_t AliITStrackerMI::AliITSlayer::FindClusterIndex(Float_t z) const {
994 //--------------------------------------------------------------------
995 // This function returns the index of the nearest cluster
996 //--------------------------------------------------------------------
997 Int_t ncl=0;
998 const Float_t *zcl;
999 if (fCurrentSlice<0) {
1000 ncl = fN;
1001 zcl = fZ;
1002 }
1003 else{
1004 ncl = fNcs;
1005 zcl = fZcs;;
1006 }
1007
1008 if (ncl==0) return 0;
1009 Int_t b=0, e=ncl-1, m=(b+e)/2;
1010 for (; b<e; m=(b+e)/2) {
1011 // if (z > fClusters[m]->GetZ()) b=m+1;
1012 if (z > zcl[m]) b=m+1;
1013 else e=m;
1014 }
1015 return m;
1016}
e43c066c 1017
1018
1019void AliITStrackerMI::AliITSlayer::
1020SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1021 //--------------------------------------------------------------------
1022 // This function sets the "window"
1023 //--------------------------------------------------------------------
1024
1d4090b7 1025 Double_t circle=TMath::TwoPi()*fR;
e43c066c 1026 fYmin = ymin; fYmax =ymax;
1027 Float_t ymiddle = (fYmin+fYmax)*0.5;
1028 if (ymiddle<fYB[0]) {fYmin+=circle; fYmax+=circle;ymiddle+=circle;}
1029 else{
1030 if (ymiddle>fYB[1]) {fYmin-=circle; fYmax-=circle;ymiddle-=circle;}
1031 }
1032 //
1033 fCurrentSlice =-1;
1034 // defualt take all
1035 fClustersCs = fClusters;
1036 fClusterIndexCs = fClusterIndex;
1037 fYcs = fY;
1038 fZcs = fZ;
1039 fNcs = fN;
1d4090b7 1040
e43c066c 1041 //is in 20 slice?
1042 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy20){
1043 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy20);
1044 if (slice<0) slice=0;
1045 if (slice>20) slice=20;
1046 Bool_t isOK = (fYmin>fBy20[slice][0]&&fYmax<fBy20[slice][1]);
1047 if (isOK) {
1048 fCurrentSlice=slice;
1049 fClustersCs = fClusters20[fCurrentSlice];
1050 fClusterIndexCs = fClusterIndex20[fCurrentSlice];
1051 fYcs = fY20[fCurrentSlice];
1052 fZcs = fZ20[fCurrentSlice];
1053 fNcs = fN20[fCurrentSlice];
1054 }
1055 }
1056 //
1057 //is in 10 slice?
1058 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy10){
1059 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy10);
1060 if (slice<0) slice=0;
1061 if (slice>10) slice=10;
1062 Bool_t isOK = (fYmin>fBy10[slice][0]&&fYmax<fBy10[slice][1]);
1063 if (isOK) {
1064 fCurrentSlice=slice;
1065 fClustersCs = fClusters10[fCurrentSlice];
1066 fClusterIndexCs = fClusterIndex10[fCurrentSlice];
1067 fYcs = fY10[fCurrentSlice];
1068 fZcs = fZ10[fCurrentSlice];
1069 fNcs = fN10[fCurrentSlice];
1070 }
1071 }
1072 //
1073 //is in 5 slice?
1074 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy5){
1075 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy5);
1076 if (slice<0) slice=0;
1077 if (slice>5) slice=5;
1078 Bool_t isOK = (fYmin>fBy5[slice][0]&&fYmax<fBy5[slice][1]);
1079 if ( isOK){
1080 fCurrentSlice=slice;
1081 fClustersCs = fClusters5[fCurrentSlice];
1082 fClusterIndexCs = fClusterIndex5[fCurrentSlice];
1083 fYcs = fY5[fCurrentSlice];
1084 fZcs = fZ5[fCurrentSlice];
1085 fNcs = fN5[fCurrentSlice];
1086 }
1087 }
1d4090b7 1088
e43c066c 1089 fI=FindClusterIndex(zmin); fZmax=zmax;
1090 fImax = TMath::Min(FindClusterIndex(zmax)+1,fNcs);
1d4090b7 1091 // fImax = fNcs;
e43c066c 1092 fSkip = 0;
1093 fAccepted =0;
1094}
1095
e43c066c 1096
1097const AliITSclusterV2 *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci){
1098 //--------------------------------------------------------------------
1099 // This function returns clusters within the "window"
1100 //--------------------------------------------------------------------
1101
1102 if (fCurrentSlice<0){
1103 Double_t rpi2 = 2.*fR*TMath::Pi();
1104 for (Int_t i=fI; i<fImax; i++) {
1105 Double_t y = fY[i];
1106 if (fYmax<y) y -= rpi2;
1d4090b7 1107 if (fYmin>y) y += rpi2;
e43c066c 1108 if (y<fYmin) continue;
1109 if (y>fYmax) continue;
1110 if (fClusters[i]->GetQ()==0&&fSkip==2) continue;
1111 ci=i;
1112 fI=i+1;
1113 return fClusters[i];
1114 }
1115 }
1116 else{
1117 for (Int_t i=fI; i<fImax; i++) {
1118 if (fYcs[i]<fYmin) continue;
1119 if (fYcs[i]>fYmax) continue;
1120 if (fClustersCs[i]->GetQ()==0&&fSkip==2) continue;
1121 ci=fClusterIndexCs[i];
1122 fI=i+1;
1123 return fClustersCs[i];
1124 }
1125 }
1126 return 0;
1127}
1128
1129
1130
1131Int_t AliITStrackerMI::AliITSlayer::
1132FindDetectorIndex(Double_t phi, Double_t z) const {
1133 //--------------------------------------------------------------------
1134 //This function finds the detector crossed by the track
1135 //--------------------------------------------------------------------
1136 Double_t dphi=-(phi-fPhiOffset);
1137 if (dphi < 0) dphi += 2*TMath::Pi();
1138 else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi();
1139 Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5);
1140 if (np>=fNladders) np-=fNladders;
1141 if (np<0) np+=fNladders;
1142
1143 Double_t dz=fZOffset-z;
1144 Int_t nz=Int_t(dz*(fNdetectors-1)*0.5/fZOffset+0.5);
1145 if (nz>=fNdetectors) return -1;
1146 if (nz<0) return -1;
1147
1148 return np*fNdetectors + nz;
1149}
1150
1151Double_t AliITStrackerMI::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0)
1152const {
1153 //--------------------------------------------------------------------
1154 //This function returns the layer thickness at this point (units X0)
1155 //--------------------------------------------------------------------
1156 Double_t d=0.0085;
1157 x0=21.82;
1158 if (43<fR&&fR<45) { //SSD2
1159 Double_t dd=0.0034;
1160 d=dd;
1161 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1162 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1163 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1164 for (Int_t i=0; i<12; i++) {
1165 if (TMath::Abs(z-3.9*(i+0.5))<0.15) {
1166 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1167 d+=0.0034;
1168 break;
1169 }
1170 if (TMath::Abs(z+3.9*(i+0.5))<0.15) {
1171 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1172 d+=0.0034;
1173 break;
1174 }
1175 if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1176 if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1177 }
1178 } else
1179 if (37<fR&&fR<41) { //SSD1
1180 Double_t dd=0.0034;
1181 d=dd;
1182 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1183 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1184 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1185 for (Int_t i=0; i<11; i++) {
1186 if (TMath::Abs(z-3.9*i)<0.15) {
1187 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1188 d+=dd;
1189 break;
1190 }
1191 if (TMath::Abs(z+3.9*i)<0.15) {
1192 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1193 d+=dd;
1194 break;
1195 }
1196 if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1197 if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1198 }
1199 } else
1200 if (13<fR&&fR<26) { //SDD
1201 Double_t dd=0.0033;
1202 d=dd;
1203 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1204
1205 if (TMath::Abs(y-1.80)<0.55) {
1206 d+=0.016;
1207 for (Int_t j=0; j<20; j++) {
1208 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1209 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1210 }
1211 }
1212 if (TMath::Abs(y+1.80)<0.55) {
1213 d+=0.016;
1214 for (Int_t j=0; j<20; j++) {
1215 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1216 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1217 }
1218 }
1219
1220 for (Int_t i=0; i<4; i++) {
1221 if (TMath::Abs(z-7.3*i)<0.60) {
1222 d+=dd;
1223 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1224 break;
1225 }
1226 if (TMath::Abs(z+7.3*i)<0.60) {
1227 d+=dd;
1228 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1229 break;
1230 }
1231 }
1232 } else
1233 if (6<fR&&fR<8) { //SPD2
1234 Double_t dd=0.0063; x0=21.5;
1235 d=dd;
1236 if (TMath::Abs(y-3.08)>0.5) d+=dd;
1237 //if (TMath::Abs(y-3.08)>0.45) d+=dd;
1238 if (TMath::Abs(y-3.03)<0.10) {d+=0.014;}
1239 } else
1240 if (3<fR&&fR<5) { //SPD1
1241 Double_t dd=0.0063; x0=21.5;
1242 d=dd;
1243 if (TMath::Abs(y+0.21)>0.6) d+=dd;
1244 //if (TMath::Abs(y+0.21)>0.45) d+=dd;
1245 if (TMath::Abs(y+0.10)<0.10) {d+=0.014;}
1246 }
1247
1248 return d;
1249}
1250
1251Double_t AliITStrackerMI::GetEffectiveThickness(Double_t y,Double_t z) const
1252{
1253 //--------------------------------------------------------------------
1254 //Returns the thickness between the current layer and the vertex (units X0)
1255 //--------------------------------------------------------------------
1256 Double_t d=0.0028*3*3; //beam pipe
1257 Double_t x0=0;
1258
1259 Double_t xn=fgLayers[fI].GetR();
1260 for (Int_t i=0; i<fI; i++) {
1261 Double_t xi=fgLayers[i].GetR();
1262 d+=fgLayers[i].GetThickness(y,z,x0)*xi*xi;
1263 }
1264
1265 if (fI>1) {
1266 Double_t xi=9.;
1267 d+=0.0097*xi*xi;
1268 }
1269
1270 if (fI>3) {
1271 Double_t xi=0.5*(fgLayers[3].GetR()+fgLayers[4].GetR());
1272 d+=0.0034*xi*xi;
1273 }
1274
1275 return d/(xn*xn);
1276}
1277
1278Int_t AliITStrackerMI::AliITSlayer::InRoad() const {
1279 //--------------------------------------------------------------------
1280 // This function returns number of clusters within the "window"
1281 //--------------------------------------------------------------------
1282 Int_t ncl=0;
1283 for (Int_t i=fI; i<fN; i++) {
1284 const AliITSclusterV2 *c=fClusters[i];
1285 if (c->GetZ() > fZmax) break;
1286 if (c->IsUsed()) continue;
1287 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
1288 Double_t y=fR*det.GetPhi() + c->GetY();
1289
1290 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
1291 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
1292
1293 if (y<fYmin) continue;
1294 if (y>fYmax) continue;
1295 ncl++;
1296 }
1297 return ncl;
1298}
1299
1300Bool_t
15dd636f 1301AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *t,const AliITStrackMI *c) {
e43c066c 1302 //--------------------------------------------------------------------
1303 // This function refits the track "t" at the position "x" using
1304 // the clusters from "c"
1305 //--------------------------------------------------------------------
1306 Int_t index[kMaxLayer];
1307 Int_t k;
1308 for (k=0; k<kMaxLayer; k++) index[k]=-1;
1309 Int_t nc=c->GetNumberOfClusters();
1310 for (k=0; k<nc; k++) {
1311 Int_t idx=c->GetClusterIndex(k),nl=(idx&0xf0000000)>>28;
1312 index[nl]=idx;
1313 }
1314
1315 Int_t from, to, step;
1316 if (xx > t->GetX()) {
1317 from=0; to=kMaxLayer;
1318 step=+1;
1319 } else {
1320 from=kMaxLayer-1; to=-1;
1321 step=-1;
1322 }
1323
1324 for (Int_t i=from; i != to; i += step) {
1325 AliITSlayer &layer=fgLayers[i];
1326 Double_t r=layer.GetR();
1327
1328 {
1329 Double_t hI=i-0.5*step;
1330 if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) {
1331 Double_t rs=0.5*(fgLayers[i-step].GetR() + r);
1332 Double_t d=0.0034, x0=38.6;
1333 if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;}
1334 if (!t->PropagateTo(rs,-step*d,x0)) {
1335 return kFALSE;
1336 }
1337 }
1338 }
1339
1340 // remember old position [SR, GSI 18.02.2003]
1341 Double_t oldX=0., oldY=0., oldZ=0.;
1342 if (t->IsStartedTimeIntegral() && step==1) {
1343 t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ);
1344 }
1345 //
1346
1347 Double_t x,y,z;
1348 if (!t->GetGlobalXYZat(r,x,y,z)) {
1349 return kFALSE;
1350 }
1351 Double_t phi=TMath::ATan2(y,x);
1352 Int_t idet=layer.FindDetectorIndex(phi,z);
1353 if (idet<0) {
1354 return kFALSE;
1355 }
1356 const AliITSdetector &det=layer.GetDetector(idet);
1357 phi=det.GetPhi();
1358 if (!t->Propagate(phi,det.GetR())) {
1359 return kFALSE;
1360 }
1361 t->SetDetectorIndex(idet);
1362
1363 const AliITSclusterV2 *cl=0;
1364 Double_t maxchi2=1000.*kMaxChi2;
1365
1366 Int_t idx=index[i];
1367 if (idx>0) {
1368 const AliITSclusterV2 *c=(AliITSclusterV2 *)GetCluster(idx);
1369 if (idet != c->GetDetectorIndex()) {
1370 idet=c->GetDetectorIndex();
1371 const AliITSdetector &det=layer.GetDetector(idet);
1372 if (!t->Propagate(det.GetPhi(),det.GetR())) {
1373 return kFALSE;
1374 }
1375 t->SetDetectorIndex(idet);
1376 }
1377 //Double_t chi2=t->GetPredictedChi2(c);
1378 Int_t layer = (idx & 0xf0000000) >> 28;;
1379 Double_t chi2=GetPredictedChi2MI(t,c,layer);
1380 if (chi2<maxchi2) {
1381 cl=c;
1382 maxchi2=chi2;
1383 } else {
1384 return kFALSE;
1385 }
1386 }
1387 /*
1388 if (cl==0)
1389 if (t->GetNumberOfClusters()>2) {
1390 Double_t dz=4*TMath::Sqrt(t->GetSigmaZ2()+kSigmaZ2[i]);
1391 Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+kSigmaY2[i]);
1392 Double_t zmin=t->GetZ() - dz;
1393 Double_t zmax=t->GetZ() + dz;
1394 Double_t ymin=t->GetY() + phi*r - dy;
1395 Double_t ymax=t->GetY() + phi*r + dy;
1396 layer.SelectClusters(zmin,zmax,ymin,ymax);
1397
1398 const AliITSclusterV2 *c=0; Int_t ci=-1;
1399 while ((c=layer.GetNextCluster(ci))!=0) {
1400 if (idet != c->GetDetectorIndex()) continue;
1401 Double_t chi2=t->GetPredictedChi2(c);
1402 if (chi2<maxchi2) { cl=c; maxchi2=chi2; idx=ci; }
1403 }
1404 }
1405 */
1406 if (cl) {
1407 //if (!t->Update(cl,maxchi2,idx)) {
1408 if (!UpdateMI(t,cl,maxchi2,idx)) {
1409 return kFALSE;
1410 }
1411 t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
1412 }
1413
1414 {
1415 Double_t x0;
1416 Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0);
1417 t->CorrectForMaterial(-step*d,x0);
1418 }
1419
1420 // track time update [SR, GSI 17.02.2003]
1421 if (t->IsStartedTimeIntegral() && step==1) {
1422 Double_t newX, newY, newZ;
1423 t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
1424 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
1425 (oldZ-newZ)*(oldZ-newZ);
1426 t->AddTimeStep(TMath::Sqrt(dL2));
1427 }
1428 //
1429
1430 }
1431
1432 if (!t->PropagateTo(xx,0.,0.)) return kFALSE;
1433 return kTRUE;
1434}
1435
1436
15dd636f 1437Double_t AliITStrackerMI::GetNormalizedChi2(AliITStrackMI * track, Int_t mode)
e43c066c 1438{
1439 //
1440 // calculate normalized chi2
1441 // return NormalizedChi2(track,0);
1442 Float_t chi2 = 0;
1443 Float_t sum=0;
1444 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
1445 // track->fdEdxMismatch=0;
1446 Float_t dedxmismatch =0;
1447 Float_t *ny = GetNy(fCurrentEsdTrack), *nz = GetNz(fCurrentEsdTrack);
1448 if (mode<100){
1449 for (Int_t i = 0;i<6;i++){
1450 if (track->fClIndex[i]>0){
1451 Float_t cerry, cerrz;
1452 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1453 else
1454 { cerry= track->fSigmaY[i]; cerrz = track->fSigmaZ[i];}
1455 cerry*=cerry;
1456 cerrz*=cerrz;
1457 Float_t cchi2 = (track->fDy[i]*track->fDy[i]/cerry)+(track->fDz[i]*track->fDz[i]/cerrz);
1458 if (i>1){
1459 Float_t ratio = track->fNormQ[i]/track->fExpQ;
1460 if (ratio<0.5) {
1461 cchi2+=(0.5-ratio)*10.;
1462 //track->fdEdxMismatch+=(0.5-ratio)*10.;
1463 dedxmismatch+=(0.5-ratio)*10.;
1464 }
1465 }
1466 if (i<2 ||i>3){
1467 AliITSclusterV2 * cl = (AliITSclusterV2*)GetCluster( track->fClIndex[i]);
1468 Double_t delta = cl->GetNy()+cl->GetNz()-ny[i]-nz[i];
1469 if (delta>1) chi2 +=0.5*TMath::Min(delta/2,2.);
1470 if (i<2) chi2+=2*cl->GetDeltaProbability();
1471 }
1472 chi2+=cchi2;
1473 sum++;
1474 }
1475 }
1476 if (TMath::Abs(track->fdEdxMismatch-dedxmismatch)>0.0001){
1477 track->fdEdxMismatch = dedxmismatch;
1478 }
1479 }
1480 else{
1481 for (Int_t i = 0;i<4;i++){
1482 if (track->fClIndex[i]>0){
1483 Float_t cerry, cerrz;
1484 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1485 else { cerry= track->fSigmaY[i]; cerrz = track->fSigmaZ[i];}
1486 cerry*=cerry;
1487 cerrz*=cerrz;
1488 chi2+= (track->fDy[i]*track->fDy[i]/cerry);
1489 chi2+= (track->fDz[i]*track->fDz[i]/cerrz);
1490 sum++;
1491 }
1492 }
1493 for (Int_t i = 4;i<6;i++){
1494 if (track->fClIndex[i]>0){
1495 Float_t cerry, cerrz;
1496 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1497 else { cerry= track->fSigmaY[i]; cerrz = track->fSigmaZ[i];}
1498 cerry*=cerry;
1499 cerrz*=cerrz;
1500 Float_t cerryb, cerrzb;
1501 if (ny[i+6]>0) {cerryb = erry[i+6]; cerrzb=errz[i+6];}
1502 else { cerryb= track->fSigmaY[i+6]; cerrzb = track->fSigmaZ[i+6];}
1503 cerryb*=cerryb;
1504 cerrzb*=cerrzb;
1505 chi2+= TMath::Min((track->fDy[i+6]*track->fDy[i+6]/cerryb),track->fDy[i]*track->fDy[i]/cerry);
1506 chi2+= TMath::Min((track->fDz[i+6]*track->fDz[i+6]/cerrzb),track->fDz[i]*track->fDz[i]/cerrz);
1507 sum++;
1508 }
1509 }
1510 }
1511 if (track->fESDtrack->GetTPCsignal()>85){
1512 Float_t ratio = track->fdEdx/track->fESDtrack->GetTPCsignal();
1513 if (ratio<0.5) {
1514 chi2+=(0.5-ratio)*5.;
1515 }
1516 if (ratio>2){
1517 chi2+=(ratio-2.0)*3;
1518 }
1519 }
1520 //
1521 Double_t match = TMath::Sqrt(track->fChi22);
1522 if (track->fConstrain) match/=track->GetNumberOfClusters();
1523 if (!track->fConstrain) match/=track->GetNumberOfClusters()-2.;
1524 if (match<0) match=0;
1525 Float_t deadzonefactor = (track->fNDeadZone>0) ? 3*(1.1-track->fDeadZoneProbability):0.;
1526 Double_t normchi2 = 2*track->fNSkipped+match+deadzonefactor+(1+(2*track->fNSkipped+deadzonefactor)/track->GetNumberOfClusters())*
1527 (chi2)/TMath::Max(double(sum-track->fNSkipped),
1528 1./(1.+track->fNSkipped));
1529
1530 return normchi2;
1531}
1532
1533
15dd636f 1534Double_t AliITStrackerMI::GetMatchingChi2(AliITStrackMI * track1, AliITStrackMI * track2)
e43c066c 1535{
1536 //
1537 // return matching chi2 between two tracks
15dd636f 1538 AliITStrackMI track3(*track2);
e43c066c 1539 track3.Propagate(track1->GetAlpha(),track1->GetX());
1540 TMatrixD vec(5,1);
1541 vec(0,0)=track1->fP0-track3.fP0;
1542 vec(1,0)=track1->fP1-track3.fP1;
1543 vec(2,0)=track1->fP2-track3.fP2;
1544 vec(3,0)=track1->fP3-track3.fP3;
1545 vec(4,0)=track1->fP4-track3.fP4;
1546 //
1547 TMatrixD cov(5,5);
1548 cov(0,0) = track1->fC00+track3.fC00;
1549 cov(1,1) = track1->fC11+track3.fC11;
1550 cov(2,2) = track1->fC22+track3.fC22;
1551 cov(3,3) = track1->fC33+track3.fC33;
1552 cov(4,4) = track1->fC44+track3.fC44;
1553
1554 cov(0,1)=cov(1,0) = track1->fC10+track3.fC10;
1555 cov(0,2)=cov(2,0) = track1->fC20+track3.fC20;
1556 cov(0,3)=cov(3,0) = track1->fC30+track3.fC30;
1557 cov(0,4)=cov(4,0) = track1->fC40+track3.fC40;
1558 //
1559 cov(1,2)=cov(2,1) = track1->fC21+track3.fC21;
1560 cov(1,3)=cov(3,1) = track1->fC31+track3.fC31;
1561 cov(1,4)=cov(4,1) = track1->fC41+track3.fC41;
1562 //
1563 cov(2,3)=cov(3,2) = track1->fC32+track3.fC32;
1564 cov(2,4)=cov(4,2) = track1->fC42+track3.fC42;
1565 //
1566 cov(3,4)=cov(4,3) = track1->fC43+track3.fC43;
1567
1568 cov.Invert();
1569 TMatrixD vec2(cov,TMatrixD::kMult,vec);
1570 TMatrixD chi2(vec2,TMatrixD::kTransposeMult,vec);
1571 return chi2(0,0);
1572}
1573
1574Double_t AliITStrackerMI::GetDeadZoneProbability(Double_t zpos, Double_t zerr)
1575{
1576 //
1577 // return probability that given point - characterized by z position and error is in dead zone
1578 //
1579 Double_t probability =0;
1580 Double_t absz = TMath::Abs(zpos);
1581 Double_t nearestz = (absz<2)? 0.:7.1;
1582 if (TMath::Abs(absz-nearestz)>0.25+3*zerr) return 0;
1583 Double_t zmin=0, zmax=0;
1584 if (zpos<-6.){
1585 zmin = -7.25; zmax = -6.95;
1586 }
1587 if (zpos>6){
1588 zmin = 7.0; zmax =7.3;
1589 }
1590 if (absz<2){
1591 zmin = -0.75; zmax = 1.5;
1592 }
1593 probability = (TMath::Erf((zpos-zmin)/zerr) - TMath::Erf((zpos-zmax)/zerr))*0.5;
1594 return probability;
1595}
1596
1597
15dd636f 1598Double_t AliITStrackerMI::GetTruncatedChi2(AliITStrackMI * track, Float_t fac)
e43c066c 1599{
1600 //
1601 // calculate normalized chi2
1602 Float_t chi2[6];
1603 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
1604 Float_t ncl = 0;
1605 for (Int_t i = 0;i<6;i++){
1606 if (TMath::Abs(track->fDy[i])>0){
1607 chi2[i]= (track->fDy[i]/erry[i])*(track->fDy[i]/erry[i]);
1608 chi2[i]+= (track->fDz[i]/errz[i])*(track->fDz[i]/errz[i]);
1609 ncl++;
1610 }
1611 else{chi2[i]=10000;}
1612 }
1613 Int_t index[6];
1614 TMath::Sort(6,chi2,index,kFALSE);
1615 Float_t max = float(ncl)*fac-1.;
1616 Float_t sumchi=0, sumweight=0;
1617 for (Int_t i=0;i<max+1;i++){
1618 Float_t weight = (i<max)?1.:(max+1.-i);
1619 sumchi+=weight*chi2[index[i]];
1620 sumweight+=weight;
1621 }
1622 Double_t normchi2 = sumchi/sumweight;
1623 return normchi2;
1624}
1625
1626
15dd636f 1627Double_t AliITStrackerMI::GetInterpolatedChi2(AliITStrackMI * forwardtrack, AliITStrackMI * backtrack)
e43c066c 1628{
1629 //
1630 // calculate normalized chi2
1631 // if (forwardtrack->fNUsed>0.3*float(forwardtrack->GetNumberOfClusters())) return 10000;
1632 Int_t npoints = 0;
1633 Double_t res =0;
1634 for (Int_t i=0;i<6;i++){
1635 if ( (backtrack->fSigmaY[i]<0.000000001) || (forwardtrack->fSigmaY[i]<0.000000001)) continue;
1636 Double_t sy1 = forwardtrack->fSigmaY[i];
1637 Double_t sz1 = forwardtrack->fSigmaZ[i];
1638 Double_t sy2 = backtrack->fSigmaY[i];
1639 Double_t sz2 = backtrack->fSigmaZ[i];
1640 if (i<2){ sy2=1000.;sz2=1000;}
1641 //
1642 Double_t dy0 = (forwardtrack->fDy[i]/(sy1*sy1) +backtrack->fDy[i]/(sy2*sy2))/(1./(sy1*sy1)+1./(sy2*sy2));
1643 Double_t dz0 = (forwardtrack->fDz[i]/(sz1*sz1) +backtrack->fDz[i]/(sz2*sz2))/(1./(sz1*sz1)+1./(sz2*sz2));
1644 //
1645 Double_t nz0 = dz0*TMath::Sqrt((1./(sz1*sz1)+1./(sz2*sz2)));
1646 Double_t ny0 = dy0*TMath::Sqrt((1./(sy1*sy1)+1./(sy2*sy2)));
1647 //
1648 res+= nz0*nz0+ny0*ny0;
1649 npoints++;
1650 }
1651 if (npoints>1) return
1652 TMath::Max(TMath::Abs(0.3*forwardtrack->Get1Pt())-0.5,0.)+
1653 //2*forwardtrack->fNUsed+
1654 res/TMath::Max(double(npoints-forwardtrack->fNSkipped),
1655 1./(1.+forwardtrack->fNSkipped));
1656 return 1000;
1657}
1658
1659
1660
1661
1662
1663Float_t *AliITStrackerMI::GetWeight(Int_t index) {
1664 //--------------------------------------------------------------------
1665 // Return pointer to a given cluster
1666 //--------------------------------------------------------------------
1667 Int_t l=(index & 0xf0000000) >> 28;
1668 Int_t c=(index & 0x0fffffff) >> 00;
1669 return fgLayers[l].GetWeight(c);
1670}
1671
15dd636f 1672void AliITStrackerMI::RegisterClusterTracks(AliITStrackMI* track,Int_t id)
e43c066c 1673{
1674 //---------------------------------------------
1675 // register track to the list
1676 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
1677 Int_t index = track->GetClusterIndex(icluster);
1678 Int_t l=(index & 0xf0000000) >> 28;
1679 Int_t c=(index & 0x0fffffff) >> 00;
1680 if (c>fgLayers[l].fN) continue;
1681 for (Int_t itrack=0;itrack<4;itrack++){
1682 if (fgLayers[l].fClusterTracks[itrack][c]<0){
1683 fgLayers[l].fClusterTracks[itrack][c]=id;
1684 break;
1685 }
1686 }
1687 }
1688}
15dd636f 1689void AliITStrackerMI::UnRegisterClusterTracks(AliITStrackMI* track, Int_t id)
e43c066c 1690{
1691 //---------------------------------------------
1692 // unregister track from the list
1693 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
1694 Int_t index = track->GetClusterIndex(icluster);
1695 Int_t l=(index & 0xf0000000) >> 28;
1696 Int_t c=(index & 0x0fffffff) >> 00;
1697 if (c>fgLayers[l].fN) continue;
1698 for (Int_t itrack=0;itrack<4;itrack++){
1699 if (fgLayers[l].fClusterTracks[itrack][c]==id){
1700 fgLayers[l].fClusterTracks[itrack][c]=-1;
1701 }
1702 }
1703 }
1704}
15dd636f 1705Float_t AliITStrackerMI::GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSclusterV2 *clist[6])
e43c066c 1706{
1707 //-------------------------------------------------------------
1708 //get number of shared clusters
1709 //-------------------------------------------------------------
1710 Float_t shared=0;
1711 for (Int_t i=0;i<6;i++) { list[i]=-1, clist[i]=0;}
1712 // mean number of clusters
1713 Float_t *ny = GetNy(id), *nz = GetNz(id);
1714
1715
1716 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
1717 Int_t index = track->GetClusterIndex(icluster);
1718 Int_t l=(index & 0xf0000000) >> 28;
1719 Int_t c=(index & 0x0fffffff) >> 00;
1720 if (c>fgLayers[l].fN) continue;
1721 if (ny[l]==0){
1722 printf("problem\n");
1723 }
1724 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(index);
1725 Float_t weight=1;
1726 //
1727 Float_t deltan = 0;
1728 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
1729 if (l>2&&track->fNormQ[l]/track->fExpQ>3.5) continue;
1730 if (l<2 || l>3){
1731 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
1732 }
1733 else{
1734 deltan = (cl->GetNz()-nz[l]);
1735 }
1736 if (deltan>2.0) continue; // extended - highly probable shared cluster
1737 weight = 2./TMath::Max(3.+deltan,2.);
1738 //
1739 for (Int_t itrack=0;itrack<4;itrack++){
1740 if (fgLayers[l].fClusterTracks[itrack][c]>=0 && fgLayers[l].fClusterTracks[itrack][c]!=id){
1741 list[l]=index;
1742 clist[l] = (AliITSclusterV2*)GetCluster(index);
1743 shared+=weight;
1744 break;
1745 }
1746 }
1747 }
1748 track->fNUsed=shared;
1749 return shared;
1750}
1751
15dd636f 1752Int_t AliITStrackerMI::GetOverlapTrack(AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6],Int_t overlist[6])
e43c066c 1753{
1754 //
1755 // find first shared track
1756 //
1757 // mean number of clusters
1758 Float_t *ny = GetNy(trackID), *nz = GetNz(trackID);
1759 //
1760 for (Int_t i=0;i<6;i++) overlist[i]=-1;
1761 Int_t sharedtrack=100000;
1762 Int_t tracks[24],trackindex=0;
1763 for (Int_t i=0;i<24;i++) {tracks[i]=-1;}
1764 //
1765 for (Int_t icluster=0;icluster<6;icluster++){
1766 if (clusterlist[icluster]<0) continue;
1767 Int_t index = clusterlist[icluster];
1768 Int_t l=(index & 0xf0000000) >> 28;
1769 Int_t c=(index & 0x0fffffff) >> 00;
1770 if (ny[l]==0){
1771 printf("problem\n");
1772 }
1773 if (c>fgLayers[l].fN) continue;
1774 //if (l>3) continue;
1775 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(index);
1776 //
1777 Float_t deltan = 0;
1778 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
1779 if (l>2&&track->fNormQ[l]/track->fExpQ>3.5) continue;
1780 if (l<2 || l>3){
1781 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
1782 }
1783 else{
1784 deltan = (cl->GetNz()-nz[l]);
1785 }
1786 if (deltan>2.0) continue; // extended - highly probable shared cluster
1787 //
1788 for (Int_t itrack=3;itrack>=0;itrack--){
1789 if (fgLayers[l].fClusterTracks[itrack][c]<0) continue;
1790 if (fgLayers[l].fClusterTracks[itrack][c]!=trackID){
1791 tracks[trackindex] = fgLayers[l].fClusterTracks[itrack][c];
1792 trackindex++;
1793 }
1794 }
1795 }
1796 if (trackindex==0) return -1;
1797 if (trackindex==1){
1798 sharedtrack = tracks[0];
1799 }else{
1800 if (trackindex==2) sharedtrack =TMath::Min(tracks[0],tracks[1]);
1801 else{
1802 //
1803 Int_t track[24], cluster[24];
1804 for (Int_t i=0;i<trackindex;i++){ track[i]=-1; cluster[i]=0;}
1805 Int_t index =0;
1806 //
1807 for (Int_t i=0;i<trackindex;i++){
1808 if (tracks[i]<0) continue;
1809 track[index] = tracks[i];
1810 cluster[index]++;
1811 for (Int_t j=i+1;j<trackindex;j++){
1812 if (tracks[j]<0) continue;
1813 if (tracks[j]==tracks[i]){
1814 cluster[index]++;
1815 tracks[j]=-1;
1816 }
1817 }
1818 index++;
1819 }
1820 Int_t max=0;
1821 for (Int_t i=0;i<index;i++){
1822 if (cluster[index]>max) {
1823 sharedtrack=track[index];
1824 max=cluster[index];
1825 }
1826 }
1827 }
1828 }
1829
1830 if (sharedtrack>=100000) return -1;
1831 //
1832 // make list of overlaps
1833 shared =0;
1834 for (Int_t icluster=0;icluster<6;icluster++){
1835 if (clusterlist[icluster]<0) continue;
1836 Int_t index = clusterlist[icluster];
1837 Int_t l=(index & 0xf0000000) >> 28;
1838 Int_t c=(index & 0x0fffffff) >> 00;
1839 if (c>fgLayers[l].fN) continue;
1840 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(index);
1841 if (l==0 || l==1){
1842 if (cl->GetNy()>2) continue;
1843 if (cl->GetNz()>2) continue;
1844 }
1845 if (l==4 || l==5){
1846 if (cl->GetNy()>3) continue;
1847 if (cl->GetNz()>3) continue;
1848 }
1849 //
1850 for (Int_t itrack=3;itrack>=0;itrack--){
1851 if (fgLayers[l].fClusterTracks[itrack][c]<0) continue;
1852 if (fgLayers[l].fClusterTracks[itrack][c]==sharedtrack){
1853 overlist[l]=index;
1854 shared++;
1855 }
1856 }
1857 }
1858 return sharedtrack;
1859}
1860
1861
15dd636f 1862AliITStrackMI * AliITStrackerMI::GetBest2Tracks(Int_t trackID1, Int_t trackID2, Float_t th0, Float_t th1){
e43c066c 1863 //
1864 // try to find track hypothesys without conflicts
1865 // with minimal chi2;
1866 TClonesArray *arr1 = (TClonesArray*)fTrackHypothesys.At(trackID1);
1867 Int_t entries1 = arr1->GetEntriesFast();
1868 TClonesArray *arr2 = (TClonesArray*)fTrackHypothesys.At(trackID2);
15dd636f 1869 if (!arr2) return (AliITStrackMI*) arr1->UncheckedAt(0);
e43c066c 1870 Int_t entries2 = arr2->GetEntriesFast();
15dd636f 1871 if (entries2<=0) return (AliITStrackMI*) arr1->UncheckedAt(0);
e43c066c 1872 //
15dd636f 1873 AliITStrackMI * track10=(AliITStrackMI*) arr1->UncheckedAt(0);
1874 AliITStrackMI * track20=(AliITStrackMI*) arr2->UncheckedAt(0);
e43c066c 1875 if (TMath::Abs(1./track10->Get1Pt())>0.5+TMath::Abs(1/track20->Get1Pt())) return track10;
1876
1877 for (Int_t itrack=0;itrack<entries1;itrack++){
15dd636f 1878 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
e43c066c 1879 UnRegisterClusterTracks(track,trackID1);
1880 }
1881 //
1882 for (Int_t itrack=0;itrack<entries2;itrack++){
15dd636f 1883 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
e43c066c 1884 UnRegisterClusterTracks(track,trackID2);
1885 }
1886 Int_t index1=0;
1887 Int_t index2=0;
1888 Float_t maxconflicts=6;
1889 Double_t maxchi2 =1000.;
1890 //
1891 // get weight of hypothesys - using best hypothesy
1892 Double_t w1,w2;
1893
1894 Int_t list1[6],list2[6];
1895 AliITSclusterV2 *clist1[6], *clist2[6] ;
1896 RegisterClusterTracks(track10,trackID1);
1897 RegisterClusterTracks(track20,trackID2);
1898 Float_t conflict1 = GetNumberOfSharedClusters(track10,trackID1,list1,clist1);
1899 Float_t conflict2 = GetNumberOfSharedClusters(track20,trackID2,list2,clist2);
1900 UnRegisterClusterTracks(track10,trackID1);
1901 UnRegisterClusterTracks(track20,trackID2);
1902 //
1903 // normalized chi2
1904 Float_t chi21 =0,chi22=0,ncl1=0,ncl2=0;
1905 Float_t nerry[6],nerrz[6];
1906 Float_t *erry1=GetErrY(trackID1),*errz1 = GetErrZ(trackID1);
1907 Float_t *erry2=GetErrY(trackID2),*errz2 = GetErrZ(trackID2);
1908 for (Int_t i=0;i<6;i++){
1909 if ( (erry1[i]>0) && (erry2[i]>0)) {
1910 nerry[i] = TMath::Min(erry1[i],erry2[i]);
1911 nerrz[i] = TMath::Min(errz1[i],errz2[i]);
1912 }else{
1913 nerry[i] = TMath::Max(erry1[i],erry2[i]);
1914 nerrz[i] = TMath::Max(errz1[i],errz2[i]);
1915 }
1916 if (TMath::Abs(track10->fDy[i])>0.000000000000001){
1917 chi21 += track10->fDy[i]*track10->fDy[i]/(nerry[i]*nerry[i]);
1918 chi21 += track10->fDz[i]*track10->fDz[i]/(nerrz[i]*nerrz[i]);
1919 ncl1++;
1920 }
1921 if (TMath::Abs(track20->fDy[i])>0.000000000000001){
1922 chi22 += track20->fDy[i]*track20->fDy[i]/(nerry[i]*nerry[i]);
1923 chi22 += track20->fDz[i]*track20->fDz[i]/(nerrz[i]*nerrz[i]);
1924 ncl2++;
1925 }
1926 }
1927 chi21/=ncl1;
1928 chi22/=ncl2;
1929 //
1930 //
1931 Float_t d1 = TMath::Sqrt(track10->fD[0]*track10->fD[0]+track10->fD[1]*track10->fD[1])+0.1;
1932 Float_t d2 = TMath::Sqrt(track20->fD[0]*track20->fD[0]+track20->fD[1]*track20->fD[1])+0.1;
1933 Float_t s1 = TMath::Sqrt(track10->GetSigmaY2()*track10->GetSigmaZ2());
1934 Float_t s2 = TMath::Sqrt(track20->GetSigmaY2()*track20->GetSigmaZ2());
1935 //
1936 w1 = (d2/(d1+d2)+ 2*s2/(s1+s2)+
1937 +s2/(s1+s2)*0.5*(chi22+2.)/(chi21+chi22+4.)
1938 +1.*TMath::Abs(1./track10->Get1Pt())/(TMath::Abs(1./track10->Get1Pt())+TMath::Abs(1./track20->Get1Pt()))
1939 );
1940 w2 = (d1/(d1+d2)+ 2*s1/(s1+s2)+
1941 s1/(s1+s2)*0.5*(chi21+2.)/(chi21+chi22+4.)
1942 +1.*TMath::Abs(1./track20->Get1Pt())/(TMath::Abs(1./track10->Get1Pt())+TMath::Abs(1./track20->Get1Pt()))
1943 );
1944
1945 Double_t sumw = w1+w2;
1946 w1/=sumw;
1947 w2/=sumw;
1948 if (w1<w2*0.5) {
1949 w1 = (d2+0.5)/(d1+d2+1.);
1950 w2 = (d1+0.5)/(d1+d2+1.);
1951 }
1952 // Float_t maxmax = w1*track10->fChi2MIP[0]+w2*track20->fChi2MIP[0]+w1*conflict1+w2*conflict2+1.;
1953 //Float_t maxconflicts0 = w1*conflict1+w2*conflict2;
1954 //
1955 // get pair of "best" hypothesys
1956 //
1957 Float_t * ny1 = GetNy(trackID1), * nz1 = GetNz(trackID1);
1958 Float_t * ny2 = GetNy(trackID2), * nz2 = GetNz(trackID2);
1959
1960 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
15dd636f 1961 AliITStrackMI * track1=(AliITStrackMI*) arr1->UncheckedAt(itrack1);
e43c066c 1962 //if (track1->fFakeRatio>0) continue;
1963 RegisterClusterTracks(track1,trackID1);
1964 for (Int_t itrack2=0;itrack2<entries2;itrack2++){
15dd636f 1965 AliITStrackMI * track2=(AliITStrackMI*) arr2->UncheckedAt(itrack2);
e43c066c 1966
1967 // Float_t current = w1*track1->fChi2MIP[0]+w2*track2->fChi2MIP[0];
1968 //if (track2->fFakeRatio>0) continue;
1969 Float_t nskipped=0;
1970 RegisterClusterTracks(track2,trackID2);
1971 Int_t list1[6],list2[6];
1972 AliITSclusterV2 *clist1[6], *clist2[6] ;
1973 Float_t cconflict1 = GetNumberOfSharedClusters(track1,trackID1,list1,clist1);
1974 Float_t cconflict2 = GetNumberOfSharedClusters(track2,trackID2,list2,clist2);
1975 UnRegisterClusterTracks(track2,trackID2);
1976 //
1977 if (track1->fConstrain) nskipped+=w1*track1->fNSkipped;
1978 if (track2->fConstrain) nskipped+=w2*track2->fNSkipped;
1979 if (nskipped>0.5) continue;
1980 //
1981 //if ( w1*conflict1+w2*conflict2>maxconflicts0) continue;
1982 if (conflict1+1<cconflict1) continue;
1983 if (conflict2+1<cconflict2) continue;
1984 Float_t conflict=0;
1985 Float_t sumchi2=0;
1986 Float_t sum=0;
1987 for (Int_t i=0;i<6;i++){
1988 //
1989 Float_t c1 =0.; // conflict coeficients
1990 Float_t c2 =0.;
1991 if (clist1[i]&&clist2[i]){
1992 Float_t deltan = 0;
1993 if (i<2 || i>3){
1994 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-TMath::Max(ny1[i],ny2[i])-TMath::Max(nz1[i],nz2[i]));
1995 }
1996 else{
1997 deltan = (clist1[i]->GetNz()-TMath::Max(nz1[i],nz2[i]));
1998 }
1999 c1 = 2./TMath::Max(3.+deltan,2.);
2000 c2 = 2./TMath::Max(3.+deltan,2.);
2001 }
2002 else{
2003 if (clist1[i]){
2004 Float_t deltan = 0;
2005 if (i<2 || i>3){
2006 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-ny1[i]-nz1[i]);
2007 }
2008 else{
2009 deltan = (clist1[i]->GetNz()-nz1[i]);
2010 }
2011 c1 = 2./TMath::Max(3.+deltan,2.);
2012 c2 = 0;
2013 }
2014
2015 if (clist2[i]){
2016 Float_t deltan = 0;
2017 if (i<2 || i>3){
2018 deltan = (clist2[i]->GetNy()+clist2[i]->GetNz()-ny2[i]-nz2[i]);
2019 }
2020 else{
2021 deltan = (clist2[i]->GetNz()-nz2[i]);
2022 }
2023 c2 = 2./TMath::Max(3.+deltan,2.);
2024 c1 = 0;
2025 }
2026 }
2027 //
2028 Double_t chi21=0,chi22=0;
2029 if (TMath::Abs(track1->fDy[i])>0.) {
2030 chi21 = (track1->fDy[i]/track1->fSigmaY[i])*(track1->fDy[i]/track1->fSigmaY[i])+
2031 (track1->fDz[i]/track1->fSigmaZ[i])*(track1->fDz[i]/track1->fSigmaZ[i]);
2032 //chi21 = (track1->fDy[i]*track1->fDy[i])/(nerry[i]*nerry[i])+
2033 // (track1->fDz[i]*track1->fDz[i])/(nerrz[i]*nerrz[i]);
2034 }else{
2035 if (TMath::Abs(track1->fSigmaY[i]>0.)) c1=1;
2036 }
2037 //
2038 if (TMath::Abs(track2->fDy[i])>0.) {
2039 chi22 = (track2->fDy[i]/track2->fSigmaY[i])*(track2->fDy[i]/track2->fSigmaY[i])+
2040 (track2->fDz[i]/track2->fSigmaZ[i])*(track2->fDz[i]/track2->fSigmaZ[i]);
2041 //chi22 = (track2->fDy[i]*track2->fDy[i])/(nerry[i]*nerry[i])+
2042 // (track2->fDz[i]*track2->fDz[i])/(nerrz[i]*nerrz[i]);
2043 }
2044 else{
2045 if (TMath::Abs(track2->fSigmaY[i]>0.)) c2=1;
2046 }
2047 sumchi2+=w1*(1.+c1)*(1+c1)*(chi21+c1)+w2*(1.+c2)*(1+c2)*(chi22+c2);
2048 if (chi21>0) sum+=w1;
2049 if (chi22>0) sum+=w2;
2050 conflict+=(c1+c2);
2051 }
2052 Double_t norm = sum-w1*track1->fNSkipped-w2*track2->fNSkipped;
2053 if (norm<0) norm =1/(w1*track1->fNSkipped+w2*track2->fNSkipped);
2054 Double_t normchi2 = 2*conflict+sumchi2/sum;
2055 if ( normchi2 <maxchi2 ){
2056 index1 = itrack1;
2057 index2 = itrack2;
2058 maxconflicts = conflict;
2059 maxchi2 = normchi2;
2060 }
2061 }
2062 UnRegisterClusterTracks(track1,trackID1);
2063 }
2064 //
2065 // if (maxconflicts<4 && maxchi2<th0){
2066 if (maxchi2<th0*2.){
2067 Float_t orig = track10->fFakeRatio*track10->GetNumberOfClusters();
15dd636f 2068 AliITStrackMI* track1=(AliITStrackMI*) arr1->UncheckedAt(index1);
e43c066c 2069 track1->fChi2MIP[5] = maxconflicts;
2070 track1->fChi2MIP[6] = maxchi2;
2071 track1->fChi2MIP[7] = 0.01+orig-(track1->fFakeRatio*track1->GetNumberOfClusters());
2072 // track1->UpdateESDtrack(AliESDtrack::kITSin);
2073 track1->fChi2MIP[8] = index1;
2074 fBestTrackIndex[trackID1] =index1;
2075 UpdateESDtrack(track1, AliESDtrack::kITSin);
2076 }
2077 else if (track10->fChi2MIP[0]<th1){
2078 track10->fChi2MIP[5] = maxconflicts;
2079 track10->fChi2MIP[6] = maxchi2;
2080 // track10->UpdateESDtrack(AliESDtrack::kITSin);
2081 UpdateESDtrack(track10,AliESDtrack::kITSin);
2082 }
2083
2084 for (Int_t itrack=0;itrack<entries1;itrack++){
15dd636f 2085 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
e43c066c 2086 UnRegisterClusterTracks(track,trackID1);
2087 }
2088 //
2089 for (Int_t itrack=0;itrack<entries2;itrack++){
15dd636f 2090 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
e43c066c 2091 UnRegisterClusterTracks(track,trackID2);
2092 }
2093
2094 if (track10->fConstrain&&track10->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track10->fChi2MIP[1]<kMaxChi2PerCluster[1]
2095 &&track10->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track10->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2096 // if (track10->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track10->fChi2MIP[1]<kMaxChi2PerCluster[1]
2097 // &&track10->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track10->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2098 RegisterClusterTracks(track10,trackID1);
2099 }
2100 if (track20->fConstrain&&track20->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track20->fChi2MIP[1]<kMaxChi2PerCluster[1]
2101 &&track20->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track20->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2102 //if (track20->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track20->fChi2MIP[1]<kMaxChi2PerCluster[1]
2103 // &&track20->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track20->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2104 RegisterClusterTracks(track20,trackID2);
2105 }
2106 return track10;
2107
2108}
2109
2110void AliITStrackerMI::UseClusters(const AliKalmanTrack *t, Int_t from) const {
2111 //--------------------------------------------------------------------
2112 // This function marks clusters assigned to the track
2113 //--------------------------------------------------------------------
2114 AliTracker::UseClusters(t,from);
2115
2116 AliITSclusterV2 *c=(AliITSclusterV2 *)GetCluster(t->GetClusterIndex(0));
2117 //if (c->GetQ()>2) c->Use();
2118 if (c->GetSigmaZ2()>0.1) c->Use();
2119 c=(AliITSclusterV2 *)GetCluster(t->GetClusterIndex(1));
2120 //if (c->GetQ()>2) c->Use();
2121 if (c->GetSigmaZ2()>0.1) c->Use();
2122
2123}
2124
2125
15dd636f 2126void AliITStrackerMI::AddTrackHypothesys(AliITStrackMI * track, Int_t esdindex)
e43c066c 2127{
2128 //------------------------------------------------------------------
2129 // add track to the list of hypothesys
2130 //------------------------------------------------------------------
2131
2132 if (esdindex>=fTrackHypothesys.GetEntriesFast()) fTrackHypothesys.Expand(esdindex*2+10);
2133 //
2134 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2135 if (!array) {
2136 array = new TObjArray(10);
2137 fTrackHypothesys.AddAt(array,esdindex);
2138 }
2139 array->AddLast(track);
2140}
2141
2142void AliITStrackerMI::SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode)
2143{
2144 //-------------------------------------------------------------------
2145 // compress array of track hypothesys
2146 // keep only maxsize best hypothesys
2147 //-------------------------------------------------------------------
2148 if (esdindex>fTrackHypothesys.GetEntriesFast()) return;
2149 if (! (fTrackHypothesys.At(esdindex)) ) return;
2150 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2151 Int_t entries = array->GetEntriesFast();
2152 //
2153 //- find preliminary besttrack as a reference
2154 Float_t minchi2=10000;
2155 Int_t maxn=0;
15dd636f 2156 AliITStrackMI * besttrack=0;
e43c066c 2157 for (Int_t itrack=0;itrack<array->GetEntriesFast();itrack++){
15dd636f 2158 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2159 if (!track) continue;
2160 Float_t chi2 = NormalizedChi2(track,0);
2161 //
2162 Int_t tpcLabel=track->fESDtrack->GetTPCLabel();
2163 track->SetLabel(tpcLabel);
2164 CookdEdx(track);
2165 track->fFakeRatio=1.;
2166 CookLabel(track,0.); //For comparison only
2167 //
2168 //if (chi2<kMaxChi2PerCluster[0]&&track->fFakeRatio==0){
2169 if (chi2<kMaxChi2PerCluster[0]){
2170 if (track->GetNumberOfClusters()<maxn) continue;
2171 maxn = track->GetNumberOfClusters();
2172 if (chi2<minchi2){
2173 minchi2=chi2;
2174 besttrack=track;
2175 }
2176 }
2177 else{
2178 delete array->RemoveAt(itrack);
2179 }
2180 }
2181 if (!besttrack) return;
2182 //
2183 //
2184 //take errors of best track as a reference
2185 Float_t *erry = GetErrY(esdindex), *errz = GetErrZ(esdindex);
2186 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
2187 for (Int_t i=0;i<6;i++) {
2188 if (besttrack->fClIndex[i]>0){
2189 erry[i] = besttrack->fSigmaY[i]; erry[i+6] = besttrack->fSigmaY[i+6];
2190 errz[i] = besttrack->fSigmaZ[i]; errz[i+6] = besttrack->fSigmaZ[i+6];
2191 ny[i] = besttrack->fNy[i];
2192 nz[i] = besttrack->fNz[i];
2193 }
2194 }
2195 //
2196 // calculate normalized chi2
2197 //
2198 Float_t * chi2 = new Float_t[entries];
2199 Int_t * index = new Int_t[entries];
2200 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2201 for (Int_t itrack=0;itrack<entries;itrack++){
15dd636f 2202 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2203 if (track){
2204 track->fChi2MIP[0] = GetNormalizedChi2(track, mode);
2205 if (track->fChi2MIP[0]<kMaxChi2PerCluster[0])
2206 chi2[itrack] = track->fChi2MIP[0];
2207 else
2208 delete array->RemoveAt(itrack);
2209 }
2210 }
2211 //
2212 TMath::Sort(entries,chi2,index,kFALSE);
15dd636f 2213 besttrack = (AliITStrackMI*)array->At(index[0]);
e43c066c 2214 if (besttrack&&besttrack->fChi2MIP[0]<kMaxChi2PerCluster[0]){
2215 for (Int_t i=0;i<6;i++){
2216 if (besttrack->fClIndex[i]>0){
2217 erry[i] = besttrack->fSigmaY[i]; erry[i+6] = besttrack->fSigmaY[i+6];
2218 errz[i] = besttrack->fSigmaZ[i]; erry[i+6] = besttrack->fSigmaY[i+6];
2219 ny[i] = besttrack->fNy[i];
2220 nz[i] = besttrack->fNz[i];
2221 }
2222 }
2223 }
2224 //
2225 // calculate one more time with updated normalized errors
2226 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2227 for (Int_t itrack=0;itrack<entries;itrack++){
15dd636f 2228 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2229 if (track){
2230 track->fChi2MIP[0] = GetNormalizedChi2(track,mode);
2231 if (track->fChi2MIP[0]<kMaxChi2PerCluster[0])
2232 chi2[itrack] = track->fChi2MIP[0]-0*(track->GetNumberOfClusters()+track->fNDeadZone);
2233 else
2234 delete array->RemoveAt(itrack);
2235 }
2236 }
2237 entries = array->GetEntriesFast();
2238 //
2239 if (entries>0){
2240 TObjArray * newarray = new TObjArray();
2241 TMath::Sort(entries,chi2,index,kFALSE);
15dd636f 2242 besttrack = (AliITStrackMI*)array->At(index[0]);
e43c066c 2243 if (besttrack){
2244 //
2245 for (Int_t i=0;i<6;i++){
2246 if (besttrack->fNz[i]>0&&besttrack->fNy[i]>0){
2247 erry[i] = besttrack->fSigmaY[i]; erry[i+6] = besttrack->fSigmaY[i+6];
2248 errz[i] = besttrack->fSigmaZ[i]; errz[i+6] = besttrack->fSigmaZ[i+6];
2249 ny[i] = besttrack->fNy[i];
2250 nz[i] = besttrack->fNz[i];
2251 }
2252 }
2253 besttrack->fChi2MIP[0] = GetNormalizedChi2(besttrack,mode);
2254 Float_t minchi2 = TMath::Min(besttrack->fChi2MIP[0]+5.+besttrack->fNUsed, double(kMaxChi2PerCluster[0]));
2255 Float_t minn = besttrack->GetNumberOfClusters()-3;
2256 Int_t accepted=0;
2257 for (Int_t i=0;i<entries;i++){
15dd636f 2258 AliITStrackMI * track = (AliITStrackMI*)array->At(index[i]);
e43c066c 2259 if (!track) continue;
2260 if (accepted>maxcut) break;
2261 track->fChi2MIP[0] = GetNormalizedChi2(track,mode);
2262 if (track->GetNumberOfClusters()<6 && (track->fChi2MIP[0]+track->fNUsed>minchi2)){
2263 delete array->RemoveAt(index[i]);
2264 continue;
2265 }
2266 if (track->fChi2MIP[0]+track->fNUsed<minchi2 && track->GetNumberOfClusters()>=minn){
2267 accepted++;
2268 //
2269 newarray->AddLast(array->RemoveAt(index[i]));
2270 for (Int_t i=0;i<6;i++){
2271 if (nz[i]==0){
2272 erry[i] = track->fSigmaY[i]; erry[i+6] = track->fSigmaY[i+6];
2273 errz[i] = track->fSigmaZ[i]; errz[i] = track->fSigmaZ[i+6];
2274 ny[i] = track->fNy[i];
2275 nz[i] = track->fNz[i];
2276 }
2277 }
2278 }
2279 else{
2280 delete array->RemoveAt(index[i]);
2281 }
2282 }
2283 array->Delete();
2284 delete fTrackHypothesys.RemoveAt(esdindex);
2285 fTrackHypothesys.AddAt(newarray,esdindex);
2286 }
2287 else{
2288 array->Delete();
2289 delete fTrackHypothesys.RemoveAt(esdindex);
2290 }
2291 }
2292 delete [] chi2;
2293 delete [] index;
2294}
2295
2296
2297
15dd636f 2298AliITStrackMI * AliITStrackerMI::GetBestHypothesys(Int_t esdindex, AliITStrackMI * original, Int_t checkmax)
e43c066c 2299{
2300 //-------------------------------------------------------------
2301 // try to find best hypothesy
2302 // currently - minimal chi2 of track+backpropagated track+matching to the tpc track
2303 //-------------------------------------------------------------
2304 if (fTrackHypothesys.GetEntriesFast()<=esdindex) return 0;
2305 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2306 if (!array) return 0;
2307 Int_t entries = array->GetEntriesFast();
2308 if (!entries) return 0;
2309 Float_t minchi2 = 100000;
15dd636f 2310 AliITStrackMI * besttrack=0;
e43c066c 2311 //
15dd636f 2312 AliITStrackMI * backtrack = new AliITStrackMI(*original);
2313 AliITStrackMI * forwardtrack = new AliITStrackMI(*original);
e43c066c 2314 //
2315 for (Int_t i=0;i<entries;i++){
15dd636f 2316 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
e43c066c 2317 if (!track) continue;
2318 track->fChi2MIP[1] = 1000000;
2319 track->fChi2MIP[2] = 1000000;
2320 track->fChi2MIP[3] = 1000000;
2321 //
2322 // backtrack
15dd636f 2323 backtrack = new(backtrack) AliITStrackMI(*track);
e43c066c 2324 backtrack->ResetCovariance();
2325 backtrack->ResetCovariance();
2326 backtrack->ResetClusters();
2327 Double_t x = original->GetX();
2328 if (!RefitAt(x,backtrack,track)) continue;
2329 track->fChi2MIP[1] = NormalizedChi2(backtrack,0);
2330 //for (Int_t i=2;i<6;i++){track->fDy[i]+=backtrack->fDy[i]; track->fDz[i]+=backtrack->fDz[i];}
2331 if (track->fChi2MIP[1]>kMaxChi2PerCluster[1]*6.) continue;
2332 track->fChi22 = GetMatchingChi2(backtrack,original);
2333
2334 if ((track->fConstrain) && track->fChi22>90.) continue;
2335 if ((!track->fConstrain) && track->fChi22>30.) continue;
2336 if ( track->fChi22/track->GetNumberOfClusters()>11.) continue;
2337
2338
2339 if (!(track->fConstrain)&&track->fChi2MIP[1]>kMaxChi2PerCluster[1]) continue;
2340 Bool_t isOK=kTRUE;
2341 /*
2342 for (Int_t i=0;i<6;i++){
2343 if (track->fClIndex[i]>0){
2344 Double_t dy1 = (track->fDy[i]/track->fSigmaY[i]);
2345 Double_t dz1 = (track->fDz[i]/track->fSigmaZ[i]);
2346 Double_t dy2 = (backtrack->fDy[i]/backtrack->fSigmaY[i]);
2347 Double_t dz2 = (backtrack->fDz[i]/backtrack->fSigmaZ[i]);
2348 if (TMath::Min(dy1*dy1+dz1*dz1,dy2*dy2+dz2*dz2)> kMaxChi2sR[i]) isOK =kFALSE;
2349 track->fDy[i+6] = backtrack->fDy[i];
2350 track->fDz[i+6] = backtrack->fDz[i];
2351 track->fSigmaY[i+6] = backtrack->fSigmaY[i];
2352 track->fSigmaZ[i+6] = backtrack->fSigmaZ[i];
2353 }
2354 else{
2355 if (i==5){
2356 if (track->fClIndex[i-1]>0){
2357 Double_t dy2 = (backtrack->fDy[i-1]/backtrack->fSigmaY[i-1]);
2358 Double_t dz2 = (backtrack->fDz[i-1]/backtrack->fSigmaZ[i-1]);
2359 if (dy2*dy2+dz2*dz2> kMaxChi2sR[i]) isOK =kFALSE;
2360 }
2361 else isOK = kFALSE;
2362 }
2363 }
2364 }
2365 */
2366 if(!isOK) continue;
2367 //
2368 //forward track - without constraint
15dd636f 2369 forwardtrack = new(forwardtrack) AliITStrackMI(*original);
e43c066c 2370 forwardtrack->ResetClusters();
2371 x = track->GetX();
2372 if (!RefitAt(x,forwardtrack,track)) continue;
2373 track->fChi2MIP[2] = NormalizedChi2(forwardtrack,0);
2374 if (track->fChi2MIP[2]>kMaxChi2PerCluster[2]*6.0) continue;
2375 if (!(track->fConstrain)&&track->fChi2MIP[2]>kMaxChi2PerCluster[2]) continue;
2376
2377 track->fD[0] = forwardtrack->GetD(GetX(),GetY());
2378 track->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
2379 forwardtrack->fD[0] = track->fD[0];
2380 forwardtrack->fD[1] = track->fD[1];
2381 {
2382 Int_t list[6];
2383 AliITSclusterV2* clist[6];
2384 track->fChi2MIP[4] = GetNumberOfSharedClusters(track,esdindex,list,clist);
2385 if ( (!track->fConstrain) && track->fChi2MIP[4]>1.0) continue;
2386 }
2387
2388 track->fChi2MIP[3] = GetInterpolatedChi2(forwardtrack,backtrack);
2389 if ( (track->fChi2MIP[3]>6.*kMaxChi2PerCluster[3])) continue;
2390 if ( (!track->fConstrain) && (track->fChi2MIP[3]>2*kMaxChi2PerCluster[3])) {
2391 track->fChi2MIP[3]=1000;
2392 continue;
2393 }
2394 Double_t chi2 = track->fChi2MIP[0]+track->fNUsed;
2395 //
2396 for (Int_t ichi=0;ichi<5;ichi++){
2397 forwardtrack->fChi2MIP[ichi] = track->fChi2MIP[ichi];
2398 }
2399 if (chi2 < minchi2){
15dd636f 2400 //besttrack = new AliITStrackMI(*forwardtrack);
99c2ee26 2401 besttrack = track;
e43c066c 2402 besttrack->SetLabel(track->GetLabel());
2403 besttrack->fFakeRatio = track->fFakeRatio;
2404 minchi2 = chi2;
2405 original->fD[0] = forwardtrack->GetD(GetX(),GetY());
2406 original->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
2407 }
2408 }
2409 delete backtrack;
2410 delete forwardtrack;
2411 Int_t accepted=0;
2412 for (Int_t i=0;i<entries;i++){
15dd636f 2413 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
e43c066c 2414 if (!track) continue;
2415 if (accepted>checkmax || track->fChi2MIP[3]>kMaxChi2PerCluster[3]*6. ||
2416 (track->GetNumberOfClusters()<besttrack->GetNumberOfClusters()-1.)||
2417 track->fChi2MIP[0]>besttrack->fChi2MIP[0]+2.*besttrack->fNUsed+3.){
2418 delete array->RemoveAt(i);
2419 continue;
2420 }
2421 else{
2422 accepted++;
2423 }
2424 }
2425 //
2426 array->Compress();
2427 SortTrackHypothesys(esdindex,checkmax,1);
2428 array = (TObjArray*) fTrackHypothesys.At(esdindex);
15dd636f 2429 besttrack = (AliITStrackMI*)array->At(0);
e43c066c 2430 if (!besttrack) return 0;
2431 besttrack->fChi2MIP[8]=0;
2432 fBestTrackIndex[esdindex]=0;
2433 entries = array->GetEntriesFast();
15dd636f 2434 AliITStrackMI *longtrack =0;
e43c066c 2435 minchi2 =1000;
2436 Float_t minn=besttrack->GetNumberOfClusters()+besttrack->fNDeadZone;
2437 for (Int_t itrack=entries-1;itrack>0;itrack--){
15dd636f 2438 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2439 if (!track->fConstrain) continue;
2440 if (track->GetNumberOfClusters()+track->fNDeadZone<minn) continue;
2441 if (track->fChi2MIP[0]-besttrack->fChi2MIP[0]>0.0) continue;
2442 if (track->fChi2MIP[0]>4.) continue;
2443 minn = track->GetNumberOfClusters()+track->fNDeadZone;
2444 longtrack =track;
2445 }
2446 //if (longtrack) besttrack=longtrack;
2447
2448 Int_t list[6];
2449 AliITSclusterV2 * clist[6];
2450 Float_t shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
2451 if (besttrack->fConstrain&&besttrack->fChi2MIP[0]<kMaxChi2PerCluster[0]&&besttrack->fChi2MIP[1]<kMaxChi2PerCluster[1]
2452 &&besttrack->fChi2MIP[2]<kMaxChi2PerCluster[2]&&besttrack->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2453 //if (besttrack->fChi2MIP[0]<kMaxChi2PerCluster[0]&&besttrack->fChi2MIP[1]<kMaxChi2PerCluster[1]
2454 // &&besttrack->fChi2MIP[2]<kMaxChi2PerCluster[2]&&besttrack->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2455 RegisterClusterTracks(besttrack,esdindex);
2456 }
2457 //
2458 //
2459 if (shared>0.0){
2460 Int_t nshared;
2461 Int_t overlist[6];
2462 Int_t sharedtrack = GetOverlapTrack(besttrack, esdindex, nshared, list, overlist);
2463 if (sharedtrack>=0){
2464 //
2465 besttrack = GetBest2Tracks(esdindex,sharedtrack,10,5.5);
2466 if (besttrack){
2467 shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
2468 }
2469 else return 0;
2470 }
2471 }
2472
2473 if (shared>2.5) return 0;
2474 if (shared>1.0) return besttrack;
2475 //
2476 // don't sign clusters if not gold track
2477 Double_t deltad = besttrack->GetD(GetX(),GetY());
2478 Double_t deltaz = besttrack->GetZat(GetX()) - GetZ();
2479 Double_t deltaprim = TMath::Sqrt(deltad*deltad+deltaz*deltaz);
2480 if (deltaprim>0.1 && (fConstraint[fPass])) return besttrack;
2481 if (TMath::Abs(deltad)>0.1) return besttrack;
2482 if (TMath::Abs(deltaz)>0.1) return besttrack;
2483 if (besttrack->fChi2MIP[0]>4.) return besttrack;
2484 if (besttrack->fChi2MIP[1]>4.) return besttrack;
2485 if (besttrack->fChi2MIP[2]>4.) return besttrack;
2486 if (besttrack->fChi2MIP[3]>4.) return besttrack;
2487 if (fConstraint[fPass]){
2488 //
2489 // sign clusters
2490 //
2491 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
2492 for (Int_t i=0;i<6;i++){
2493 Int_t index = besttrack->fClIndex[i];
2494 if (index<=0) continue;
2495 Int_t ilayer = (index & 0xf0000000) >> 28;
2496 if (besttrack->fSigmaY[ilayer]<0.00000000001) continue;
2497 AliITSclusterV2 *c = (AliITSclusterV2*)GetCluster(index);
2498 if (!c) continue;
2499 if (ilayer>3&&c->GetNy()+c->GetNz()>6) continue;
2500 if ( (c->GetNy()+c->GetNz() )> ny[i]+nz[i]+0.7) continue; //shared track
2501 if ( c->GetNz()> nz[i]+0.7) continue; //shared track
2502 if ( ilayer>2&& besttrack->fNormQ[ilayer]/besttrack->fExpQ>1.5) continue;
2503 //if ( c->GetNy()> ny[i]+0.7) continue; //shared track
2504
2505 Bool_t cansign = kTRUE;
2506 for (Int_t itrack=0;itrack<entries; itrack++){
15dd636f 2507 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
e43c066c 2508 if (!track) continue;
2509 if (track->fChi2MIP[0]>besttrack->fChi2MIP[0]+2.*shared+1.) break;
2510 if ( (track->fClIndex[ilayer]>0) && (track->fClIndex[ilayer]!=besttrack->fClIndex[ilayer])){
2511 cansign = kFALSE;
2512 break;
2513 }
2514 }
2515 if (cansign){
2516 if (TMath::Abs(besttrack->fDy[ilayer]/besttrack->fSigmaY[ilayer])>3.) continue;
2517 if (TMath::Abs(besttrack->fDz[ilayer]/besttrack->fSigmaZ[ilayer])>3.) continue;
2518 if (!c->IsUsed()) c->Use();
2519 }
2520 }
2521 }
2522 return besttrack;
2523}
2524
2525
2526
2527void AliITStrackerMI::GetBestHypothesysMIP(TObjArray &itsTracks)
2528{
2529 //
2530 // get "best" hypothesys
2531 //for (Int_t ilayer=0;ilayer<6;ilayer++) fgLayers[ilayer].ResetWeights();
2532
2533
2534 Int_t nentries = itsTracks.GetEntriesFast();
2535 for (Int_t i=0;i<nentries;i++){
15dd636f 2536 AliITStrackMI* track = (AliITStrackMI*)itsTracks.At(i);
e43c066c 2537 if (!track) continue;
2538 TObjArray * array = (TObjArray*) fTrackHypothesys.At(i);
2539 if (!array) continue;
2540 if (array->GetEntriesFast()<=0) continue;
2541 //
15dd636f 2542 AliITStrackMI* longtrack=0;
e43c066c 2543 Float_t minn=0;
2544 Float_t maxchi2=1000;
2545 for (Int_t j=0;j<array->GetEntriesFast();j++){
15dd636f 2546 AliITStrackMI* track = (AliITStrackMI*)array->At(j);
e43c066c 2547 if (!track) continue;
2548 if (track->GetNumberOfClusters()+track->fNDeadZone<minn) continue;
2549 if (track->GetNumberOfClusters()+track->fNDeadZone>minn) maxchi2 = track->fChi2MIP[0];
2550 if (track->fChi2MIP[0]>maxchi2) continue;
2551 minn= track->GetNumberOfClusters()+track->fNDeadZone;
2552 maxchi2 = track->fChi2MIP[0];
2553 longtrack=track;
2554 break;
2555 }
15dd636f 2556 AliITStrackMI * besttrack = (AliITStrackMI*)array->At(0);
e43c066c 2557 if (!longtrack) {longtrack = besttrack;}
2558 else besttrack= longtrack;
2559 if (besttrack){
2560 Int_t list[6];
2561 AliITSclusterV2 * clist[6];
2562 Float_t shared = GetNumberOfSharedClusters(longtrack,i,list,clist);
2563 //
2564 track->fNUsed = shared;
2565 track->fNSkipped = besttrack->fNSkipped;
2566 track->fChi2MIP[0] = besttrack->fChi2MIP[0];
2567 if (shared>0){
2568 Int_t nshared;
2569 Int_t overlist[6];
2570 //
2571 Int_t sharedtrack = GetOverlapTrack(longtrack, i, nshared, list, overlist);
2572 //if (sharedtrack==-1) sharedtrack=0;
2573 if (sharedtrack>=0){
2574 besttrack = GetBest2Tracks(i,sharedtrack,10,5.5);
2575 }
2576 }
2577 if (besttrack&&fConstraint[fPass])
2578 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
2579 //if (besttrack&&besttrack->fConstrain)
2580 // UpdateESDtrack(besttrack,AliESDtrack::kITSin);
2581 if (besttrack->fChi2MIP[0]+besttrack->fNUsed>1.5){
2582 if ( (TMath::Abs(besttrack->fD[0])>0.1) && fConstraint[fPass]) {
2583 track->fReconstructed= kFALSE;
2584 }
2585 if ( (TMath::Abs(besttrack->fD[1])>0.1) && fConstraint[fPass]){
2586 track->fReconstructed= kFALSE;
2587 }
2588 }
2589
2590 }
2591 }
2592}
2593
2594
15dd636f 2595void AliITStrackerMI::CookLabel(AliITStrackMI *track,Float_t wrong) const {
e43c066c 2596 //--------------------------------------------------------------------
2597 //This function "cooks" a track label. If label<0, this track is fake.
2598 //--------------------------------------------------------------------
2599 Int_t tpcLabel=-1;
2600
2601 if ( track->fESDtrack) tpcLabel = TMath::Abs(track->fESDtrack->GetTPCLabel());
2602
2603 track->fChi2MIP[9]=0;
2604 Int_t nwrong=0;
2605 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
2606 Int_t cindex = track->GetClusterIndex(i);
2607 Int_t l=(cindex & 0xf0000000) >> 28;
2608 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(cindex);
2609 Int_t isWrong=1;
2610 for (Int_t ind=0;ind<3;ind++){
2611 if (tpcLabel>0)
2612 if (cl->GetLabel(ind)==tpcLabel) isWrong=0;
2613 }
2614 track->fChi2MIP[9]+=isWrong*(2<<l);
2615 nwrong+=isWrong;
2616 }
2617 track->fFakeRatio = double(nwrong)/double(track->GetNumberOfClusters());
2618 if (tpcLabel>0){
2619 if (track->fFakeRatio>wrong) track->fLab = -tpcLabel;
2620 else
2621 track->fLab = tpcLabel;
2622 }
2623
2624}
2625
2626
2627
15dd636f 2628void AliITStrackerMI::CookdEdx(AliITStrackMI* track)
e43c066c 2629{
2630 //
2631 //
2632 // Int_t list[6];
2633 //AliITSclusterV2 * clist[6];
2634 // Int_t shared = GetNumberOfSharedClusters(track,index,list,clist);
2635 Float_t dedx[4];
2636 Int_t accepted=0;
2637 track->fChi2MIP[9]=0;
2638 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
2639 Int_t cindex = track->GetClusterIndex(i);
2640 Int_t l=(cindex & 0xf0000000) >> 28;
2641 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(cindex);
2642 Int_t lab = TMath::Abs(track->fESDtrack->GetTPCLabel());
2643 Int_t isWrong=1;
2644 for (Int_t ind=0;ind<3;ind++){
2645 if (cl->GetLabel(ind)==lab) isWrong=0;
2646 }
2647 track->fChi2MIP[9]+=isWrong*(2<<l);
2648 if (l<2) continue;
2649 //if (l>3 && (cl->GetNy()>4) || (cl->GetNz()>4)) continue; //shared track
2650 //if (l>3&& !(cl->GetType()==1||cl->GetType()==10)) continue;
2651 //if (l<4&& !(cl->GetType()==1)) continue;
2652 dedx[accepted]= track->fdEdxSample[i];
2653 //dedx[accepted]= track->fNormQ[l];
2654 accepted++;
2655 }
2656 if (accepted<1) {
2657 track->SetdEdx(0);
2658 return;
2659 }
2660 Int_t indexes[4];
2661 TMath::Sort(accepted,dedx,indexes,kFALSE);
2662 Double_t low=0.;
2663 Double_t up=0.51;
2664 Double_t nl=low*accepted, nu =up*accepted;
2665 Float_t sumamp = 0;
2666 Float_t sumweight =0;
2667 for (Int_t i=0; i<accepted; i++) {
2668 Float_t weight =1;
2669 if (i<nl+0.1) weight = TMath::Max(1.-(nl-i),0.);
2670 if (i>nu-1) weight = TMath::Max(nu-i,0.);
2671 sumamp+= dedx[indexes[i]]*weight;
2672 sumweight+=weight;
2673 }
2674 track->SetdEdx(sumamp/sumweight);
2675}
2676
2677
2678void AliITStrackerMI::MakeCoeficients(Int_t ntracks){
2679 //
2680 //
2681 fCoeficients = new Float_t[ntracks*48];
2682 for (Int_t i=0;i<ntracks*48;i++) fCoeficients[i]=-1.;
2683}
2684
2685
15dd636f 2686Double_t AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSclusterV2 *cluster,Int_t layer)
e43c066c 2687{
2688 //
2689 //
2690 //
2691 Float_t erry,errz;
2692 Float_t theta = track->GetTgl();
2693 Float_t phi = track->GetSnp();
2694 phi = TMath::Sqrt(phi*phi/(1.-phi*phi));
2695 GetError(layer,cluster,theta,phi,track->fExpQ,erry,errz);
2696 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz);
2697 Float_t ny,nz;
2698 GetNTeor(layer,cluster, theta,phi,ny,nz);
2699 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
2700 if (delta>1){
2701 chi2+=0.5*TMath::Min(delta/2,2.);
2702 chi2+=2.*cluster->GetDeltaProbability();
2703 }
2704 //
2705 track->fNy[layer] =ny;
2706 track->fNz[layer] =nz;
2707 track->fSigmaY[layer] = erry;
2708 track->fSigmaZ[layer] = errz;
2709 //track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt(1+theta*theta+phi*phi);
2710 track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt((1.+ track->fP3*track->fP3)/(1.- track->fP2*track->fP2));
2711 return chi2;
2712
2713}
2714
15dd636f 2715Int_t AliITStrackerMI::UpdateMI(AliITStrackMI* track, const AliITSclusterV2* cl,Double_t chi2,Int_t index) const
e43c066c 2716{
2717 //
2718 //
2719 //
2720 Int_t layer = (index & 0xf0000000) >> 28;
2721 track->fClIndex[layer] = index;
2722 if ( (layer>1) &&track->fNormQ[layer]/track->fExpQ<0.5 ) {
2723 chi2+= (0.5-track->fNormQ[layer]/track->fExpQ)*10.;
2724 track->fdEdxMismatch+=(0.5-track->fNormQ[layer]/track->fExpQ)*10.;
2725 }
2726 return track->UpdateMI(cl->GetY(),cl->GetZ(),track->fSigmaY[layer],track->fSigmaZ[layer],chi2,index);
2727}
2728
2729void AliITStrackerMI::GetNTeor(Int_t layer, const AliITSclusterV2* /*cl*/, Float_t theta, Float_t phi, Float_t &ny, Float_t &nz)
2730{
2731 //
2732 //get "mean shape"
2733 //
2734 if (layer==0){
2735 ny = 1.+TMath::Abs(phi)*3.2;
2736 nz = 1.+TMath::Abs(theta)*0.34;
2737 return;
2738 }
2739 if (layer==1){
2740 ny = 1.+TMath::Abs(phi)*3.2;
2741 nz = 1.+TMath::Abs(theta)*0.28;
2742 return;
2743 }
2744
2745 if (layer>3){
2746 ny = 2.02+TMath::Abs(phi)*1.95;
2747 nz = 2.02+TMath::Abs(phi)*2.35;
2748 return;
2749 }
4c53440c 2750 ny = 6.6-2.7*TMath::Abs(phi);
e43c066c 2751 nz = 2.8-3.11*TMath::Abs(phi)+0.45*TMath::Abs(theta);
2752}
2753
2754
2755
2756Int_t AliITStrackerMI::GetError(Int_t layer, const AliITSclusterV2*cl, Float_t theta, Float_t phi,Float_t expQ, Float_t &erry, Float_t &errz)
2757{
2758 //calculate cluster position error
2759 //
2760 Float_t nz,ny;
2761 GetNTeor(layer, cl,theta,phi,ny,nz);
2762 erry = TMath::Sqrt(cl->GetSigmaY2());
2763 errz = TMath::Sqrt(cl->GetSigmaZ2());
2764 //
2765 // PIXELS
2766 if (layer<2){
2767
2768 if (TMath::Abs(ny-cl->GetNy())>0.6) {
2769 if (ny<cl->GetNy()){
2770 erry*=0.4+TMath::Abs(ny-cl->GetNy());
2771 errz*=0.4+TMath::Abs(ny-cl->GetNy());
2772 }else{
2773 erry*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
2774 errz*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
2775 }
2776 }
2777 if (TMath::Abs(nz-cl->GetNz())>1.) {
2778 erry*=TMath::Abs(nz-cl->GetNz());
2779 errz*=TMath::Abs(nz-cl->GetNz());
2780 }
2781 erry*=0.85;
2782 errz*=0.85;
2783 erry= TMath::Min(erry,float(0.005));
2784 errz= TMath::Min(errz,float(0.03));
2785 return 10;
2786 }
2787
2788//STRIPS
2789 if (layer>3){
1d4090b7 2790 //factor 1.8 appears in new simulation
2791 //
2792 Float_t scale=1.8;
e43c066c 2793 if (cl->GetNy()==100||cl->GetNz()==100){
1d4090b7 2794 erry = 0.004*scale;
2795 errz = 0.2*scale;
e43c066c 2796 return 100;
2797 }
2798 if (cl->GetNy()+cl->GetNz()>12){
1d4090b7 2799 erry = 0.06*scale;
2800 errz = 0.57*scale;
e43c066c 2801 return 100;
2802 }
2803 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
2804 Float_t chargematch = TMath::Max(double(normq/expQ),2.);
2805 //
2806 if (cl->GetType()==1 || cl->GetType()==10 ){
2807 if (chargematch<1.0 || (cl->GetNy()+cl->GetNz()<nz+ny+0.5)){
1d4090b7 2808 errz = 0.043*scale;
2809 erry = 0.00094*scale;
e43c066c 2810 return 101;
2811 }
2812 if (cl->GetNy()+cl->GetNz()<nz+ny+1.2){
1d4090b7 2813 errz = 0.06*scale;
2814 erry =0.0013*scale;
e43c066c 2815 return 102;
2816 }
1d4090b7 2817 erry = 0.0027*scale;
2818 errz = TMath::Min(0.028*(chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.15)*scale;
e43c066c 2819 return 103;
2820 }
2821 if (cl->GetType()==2 || cl->GetType()==11 ){
1d4090b7 2822 erry = TMath::Min(0.0010*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.05)*scale;
2823 errz = TMath::Min(0.025*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.5)*scale;
e43c066c 2824 return 104;
2825 }
2826
2827 if (cl->GetType()>100 ){
2828 if ((chargematch+cl->GetNy()+cl->GetNz()-nz-ny<1.5)){
1d4090b7 2829 errz = 0.05*scale;
2830 erry = 0.00096*scale;
e43c066c 2831 return 105;
2832 }
2833 if (cl->GetNy()+cl->GetNz()-nz-ny<1){
1d4090b7 2834 errz = 0.10*scale;
2835 erry = 0.0025*scale;
e43c066c 2836 return 106;
2837 }
2838
1d4090b7 2839 errz = TMath::Min(0.05*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.4)*scale;
2840 erry = TMath::Min(0.003*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.05)*scale;
e43c066c 2841 return 107;
2842 }
2843 Float_t diff = cl->GetNy()+cl->GetNz()-ny-nz;
2844 if (diff<1) diff=1;
2845 if (diff>4) diff=4;
2846
2847 if (cl->GetType()==5||cl->GetType()==6||cl->GetType()==7||cl->GetType()==8){
2848 errz = 0.14*diff;
2849 erry = 0.003*diff;
2850 return 108;
2851 }
2852 erry = 0.04*diff;
2853 errz = 0.06*diff;
2854 return 109;
2855 }
2856 //DRIFTS
2857 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
2858 Float_t chargematch = normq/expQ;
2859 Float_t factorz=1;
2860 Int_t cnz = cl->GetNz()%10;
2861 //charge match
2862 if (cl->GetType()==1){
2863 if (chargematch<1.25){
2864 erry = 0.0028*(1.+6./cl->GetQ()); // gold clusters
2865 }
2866 else{
2867 erry = 0.003*chargematch;
2868 if (cl->GetNz()==3) erry*=1.5;
2869 }
2870 if (chargematch<1.0){
2871 errz = 0.0011*(1.+6./cl->GetQ());
2872 }
2873 else{
2874 errz = 0.002*(1+2*(chargematch-1.));
2875 }
2876 if (cnz>nz+0.6) {
2877 erry*=(cnz-nz+0.5);
2878 errz*=1.4*(cnz-nz+0.5);
2879 }
2880 }
2881 if (cl->GetType()>1){
2882 if (chargematch<1){
2883 erry = 0.00385*(1.+6./cl->GetQ()); // gold clusters
2884 errz = 0.0016*(1.+6./cl->GetQ());
2885 }
2886 else{
2887 errz = 0.0014*(1+3*(chargematch-1.));
2888 erry = 0.003*(1+3*(chargematch-1.));
2889 }
2890 if (cnz>nz+0.6) {
2891 erry*=(cnz-nz+0.5);
2892 errz*=1.4*(cnz-nz+0.5);
2893 }
2894 }
2895
2896 if (TMath::Abs(cl->GetY())>2.5){
2897 factorz*=1+2*(TMath::Abs(cl->GetY())-2.5);
2898 }
2899 if (TMath::Abs(cl->GetY())<1){
2900 factorz*=1.+0.5*TMath::Abs(TMath::Abs(cl->GetY())-1.);
2901 }
2902 factorz= TMath::Min(factorz,float(4.));
2903 errz*=factorz;
2904
2905 erry= TMath::Min(erry,float(0.05));
2906 errz= TMath::Min(errz,float(0.05));
2907 return 200;
2908}
2909
2910
2911
2912void AliITStrackerMI::SignDeltas( TObjArray *ClusterArray, Float_t vz)
2913{
2914 //
2915 //
2916 Int_t entries = ClusterArray->GetEntriesFast();
2917 if (entries<4) return;
2918 AliITSclusterV2* cluster = (AliITSclusterV2*)ClusterArray->At(0);
2919 Int_t layer = cluster->GetLayer();
2920 if (layer>1) return;
2921 Int_t index[10000];
2922 Int_t ncandidates=0;
2923 Float_t r = (layer>0)? 7:4;
2924 //
2925 for (Int_t i=0;i<entries;i++){
2926 AliITSclusterV2* cl0 = (AliITSclusterV2*)ClusterArray->At(i);
2927 Float_t nz = 1+TMath::Abs((cl0->GetZ()-vz)/r);
2928 if (cl0->GetNy()+cl0->GetNz()<=5+2*layer+nz) continue;
2929 index[ncandidates] = i; //candidate to belong to delta electron track
2930 ncandidates++;
2931 if (cl0->GetNy()+cl0->GetNz()>9+2*layer+nz) {
2932 cl0->SetDeltaProbability(1);
2933 }
2934 }
2935 //
2936 //
2937 //
2938 for (Int_t i=0;i<ncandidates;i++){
2939 AliITSclusterV2* cl0 = (AliITSclusterV2*)ClusterArray->At(index[i]);
2940 if (cl0->GetDeltaProbability()>0.8) continue;
2941 //
2942 Int_t ncl = 0;
2943 Float_t y[100],z[100],sumy,sumz,sumy2, sumyz, sumw;
2944 sumy=sumz=sumy2=sumyz=sumw=0.0;
2945 for (Int_t j=0;j<ncandidates;j++){
2946 if (i==j) continue;
2947 AliITSclusterV2* cl1 = (AliITSclusterV2*)ClusterArray->At(index[j]);
2948 //
2949 Float_t dz = cl0->GetZ()-cl1->GetZ();
2950 Float_t dy = cl0->GetY()-cl1->GetY();
2951 if (TMath::Sqrt(dz*dz+dy*dy)<0.2){
2952 Float_t weight = cl1->GetNy()+cl1->GetNz()-2;
2953 y[ncl] = cl1->GetY();
2954 z[ncl] = cl1->GetZ();
2955 sumy+= y[ncl]*weight;
2956 sumz+= z[ncl]*weight;
2957 sumy2+=y[ncl]*y[ncl]*weight;
2958 sumyz+=y[ncl]*z[ncl]*weight;
2959 sumw+=weight;
2960 ncl++;
2961 }
2962 }
2963 if (ncl<4) continue;
2964 Float_t det = sumw*sumy2 - sumy*sumy;
2965 Float_t delta=1000;
2966 if (TMath::Abs(det)>0.01){
2967 Float_t z0 = (sumy2*sumz - sumy*sumyz)/det;
2968 Float_t k = (sumyz*sumw - sumy*sumz)/det;
2969 delta = TMath::Abs(cl0->GetZ()-(z0+k*cl0->GetY()));
2970 }
2971 else{
2972 Float_t z0 = sumyz/sumy;
2973 delta = TMath::Abs(cl0->GetZ()-z0);
2974 }
2975 if ( delta<0.05) {
2976 cl0->SetDeltaProbability(1-20.*delta);
2977 }
2978 }
2979}
2980
2981
15dd636f 2982void AliITStrackerMI::UpdateESDtrack(AliITStrackMI* track, ULong_t flags) const
e43c066c 2983{
2984 //
2985 //
2986 track->UpdateESDtrack(flags);
15dd636f 2987 AliITStrackMI * oldtrack = (AliITStrackMI*)(track->fESDtrack->GetITStrack());
99c2ee26 2988 if (oldtrack) delete oldtrack;
15dd636f 2989 track->fESDtrack->SetITStrack(new AliITStrackMI(*track));
e43c066c 2990}
2991
2992
2993
2994
51ad6848 2995
2996
2997
2998
2999void AliITStrackerMI::FindV0(AliESD *event)
e43c066c 3000{
3001 //
3002 // fast V0 finder
3003 //
51ad6848 3004 //fV0Array->Clean();
4661fe35 3005 AliHelix * helixes = new AliHelix[30000];
e43c066c 3006 TObjArray trackarray(30000);
3007 Float_t dist[30000];
51ad6848 3008 Float_t mindist[30000];
3009 AliESDV0MI *vertexarray = new AliESDV0MI[20000];
3010 AliV0vertex *oldvertexarray = new AliV0vertex[20000];
3011 AliESDV0MI *pvertex = &vertexarray[0];
3012
3013
e43c066c 3014 //
3015 Int_t entries = fTrackHypothesys.GetEntriesFast();
3016 for (Int_t i=0;i<entries;i++){
3017 TObjArray * array = (TObjArray*)fTrackHypothesys.At(i);
3018 if (!array) continue;
15dd636f 3019 AliITStrackMI * track = (AliITStrackMI*)array->At(fBestTrackIndex[i]);
e43c066c 3020 if (track){
3021 dist[i] = TMath::Sqrt(track->fD[0]*track->fD[0]+track->fD[1]*track->fD[1]);
51ad6848 3022 Float_t pt1 = TMath::Abs(track->fP4*track->GetConvConst());
3023 mindist[i] = TMath::Min(0.02+0.03*pt1,0.15);
3024 if (mindist[i]<0.05) mindist[i]=0.05;
e43c066c 3025 trackarray.AddAt(track,i);
3026 new (&helixes[i]) AliHelix(*track);
3027 }
3028 }
51ad6848 3029 // Int_t multifound=0;
3030 Int_t vertexall =0;
3031 AliESDV0MI tempvertex;
3032 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
3033
e43c066c 3034 for (Int_t itrack0=0;itrack0<entries;itrack0++){
15dd636f 3035 AliITStrackMI * track0 = (AliITStrackMI*)trackarray.At(itrack0);
e43c066c 3036 if (!track0) continue;
51ad6848 3037 if (track0->fP4>0) continue;
3038 if (dist[itrack0]<mindist[itrack0]) continue;
3039 Int_t vertexes =0;
3040 //
3041 for (Int_t itrack1=0;itrack1<entries;itrack1++){
15dd636f 3042 AliITStrackMI * track1 = (AliITStrackMI*)trackarray.At(itrack1);
e43c066c 3043 if (!track1) continue;
51ad6848 3044 if (track1->fP4<0) continue;
3045 if (dist[itrack1]<mindist[itrack1]) continue;
3046 //
e43c066c 3047 AliHelix *h1 = &helixes[itrack0];
51ad6848 3048 AliHelix *h2 = &helixes[itrack1];
3049 Double_t distance = TestV0(h1,h2,pvertex);
e43c066c 3050 if (distance>0.4) continue;
51ad6848 3051 //
3052 if (distance>0.3*(dist[itrack1]+dist[itrack0])) continue;
3053 //if (distance>0.2*dist[itrack0]) continue;
0703142d 3054 if (pvertex->GetRr()<0.3*(dist[itrack1]+dist[itrack0])) continue;
3055 if (pvertex->GetRr()>27) continue;
51ad6848 3056 pvertex->SetM(*track0);
3057 pvertex->SetP(*track1);
3058 pvertex->Update(primvertex);
3059 //
3060 //
0703142d 3061 if (pvertex->GetPointAngle()<0.85) continue;
51ad6848 3062 //
3063 //
0703142d 3064 pvertex->SetLab(0,track0->GetLabel());
3065 pvertex->SetLab(1,track1->GetLabel());
3066 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
3067 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
51ad6848 3068 // calculate chi2s
3069 //
0703142d 3070 pvertex->SetChi2After(0);
3071 pvertex->SetChi2Before(0);
3072 pvertex->SetNBefore(0);
3073 pvertex->SetNAfter(0);
e43c066c 3074
51ad6848 3075 for (Int_t i=0;i<6;i++){
3076 Float_t radius = fgLayers[i].GetR();
0703142d 3077 if (pvertex->GetRr()>radius+0.5){
3078 pvertex->SetNBefore(pvertex->GetNBefore()+2.);
51ad6848 3079 //
3080 if (track0->fClIndex[i]<=0) {
0703142d 3081 pvertex->SetChi2Before(pvertex->GetChi2Before()+9);
51ad6848 3082 }else{
3083 Float_t chi2 = track0->fDy[i]*track0->fDy[i]/(track0->fSigmaY[i]*track0->fSigmaY[i])+
3084 track0->fDz[i]*track0->fDz[i]/(track0->fSigmaZ[i]*track0->fSigmaZ[i]);
0703142d 3085 pvertex->SetChi2Before(pvertex->GetChi2Before()+chi2);
51ad6848 3086 }
3087
3088 if (track1->fClIndex[i]<=0) {
0703142d 3089 pvertex->SetChi2Before(pvertex->GetChi2Before()+9);
51ad6848 3090 }else{
3091 Float_t chi2 = track1->fDy[i]*track1->fDy[i]/(track1->fSigmaY[i]*track1->fSigmaY[i])+
3092 track1->fDz[i]*track1->fDz[i]/(track1->fSigmaZ[i]*track1->fSigmaZ[i]);
0703142d 3093 pvertex->SetChi2Before(pvertex->GetChi2Before()+chi2);
51ad6848 3094 }
3095 }
3096
0703142d 3097 if (pvertex->GetRr()<radius-0.5){
3098 pvertex->SetNAfter(pvertex->GetNAfter()+2.);
51ad6848 3099 //
3100 if (track0->fClIndex[i]<=0) {
0703142d 3101 pvertex->SetChi2After(pvertex->GetChi2After()+9);
51ad6848 3102 }else{
3103 Float_t chi2 = track0->fDy[i]*track0->fDy[i]/(track0->fSigmaY[i]*track0->fSigmaY[i])+
3104 track0->fDz[i]*track0->fDz[i]/(track0->fSigmaZ[i]*track0->fSigmaZ[i]);
0703142d 3105 pvertex->SetChi2After(pvertex->GetChi2After()+chi2);
51ad6848 3106 }
3107
3108 if (track1->fClIndex[i]<=0) {
0703142d 3109 pvertex->SetChi2After(pvertex->GetChi2After()+9);
51ad6848 3110 }else{
3111 Float_t chi2 = track1->fDy[i]*track1->fDy[i]/(track1->fSigmaY[i]*track1->fSigmaY[i])+
3112 track1->fDz[i]*track1->fDz[i]/(track1->fSigmaZ[i]*track1->fSigmaZ[i]);
0703142d 3113 pvertex->SetChi2After(pvertex->GetChi2After()+chi2);
51ad6848 3114 }
3115 }
e43c066c 3116 }
0703142d 3117 if (pvertex->GetNBefore()>2){
3118 if (pvertex->GetChi2Before()/pvertex->GetNBefore()<4.) continue; //have clusters before vetex
51ad6848 3119 }
3120 distance = FindBestPair(itrack0,itrack1,pvertex);
0703142d 3121 if (pvertex->GetPointAngle()<0.85) continue;
51ad6848 3122 //
3123 if (distance>0.3) continue;
0703142d 3124 // if (pvertex->GetDistSigma()*6>pvertex->GetRr()) continue;
3125 // if (pvertex->GetDistSigma()>0.4) continue;
3126 //if (pvertex->GetDistNorm()>5.5) continue;
51ad6848 3127 new (&oldvertexarray[vertexall]) AliV0vertex(*track0,*track1) ;
3128 vertexes++;
3129 vertexall++;
3130 pvertex = &vertexarray[vertexall];
3131 }
3132 }
3133 // printf("\n\n\nMultifound\t%d\n\n\n",multifound);
3134 //
3135 // sort vertices according quality
3136 Float_t quality[10000];
3137 Int_t indexes[10000];
3138 Int_t trackvertices[30000];
3139 for (Int_t i=0;i<entries;i++) trackvertices[i]=0;
0703142d 3140 for (Int_t i=0;i<vertexall;i++) quality[i] = 1.-vertexarray[i].GetPointAngle();
51ad6848 3141 TMath::Sort(vertexall,quality,indexes,kFALSE);
3142
3143 for (Int_t i=0;i<vertexall;i++){
3144 pvertex= &vertexarray[indexes[i]];
0703142d 3145 Int_t index0 = vertexarray[indexes[i]].GetIndex(0);
3146 Int_t index1 = vertexarray[indexes[i]].GetIndex(1);
3147 vertexarray[indexes[i]].SetOrder(2,i);
3148 vertexarray[indexes[i]].SetOrder(1,trackvertices[index1]);
3149 vertexarray[indexes[i]].SetOrder(0,trackvertices[index0]);
51ad6848 3150 if (trackvertices[index1]+trackvertices[index0]>2) continue;
3151 if (trackvertices[index1]+trackvertices[index0]>0) {
0703142d 3152 // if (pvertex->GetPointAngle()<0.995) continue;
51ad6848 3153 }
3154 trackvertices[index0]++;
3155 trackvertices[index1]++;
3156
3157 // event->AddV0(&oldvertexarray[indexes[i]]);
3158 Int_t v0index = event->AddV0MI(&vertexarray[indexes[i]]);
0703142d 3159 AliESDtrack * ptrack0 = event->GetTrack(vertexarray[indexes[i]].GetIndex(0));
3160 AliESDtrack * ptrack1 = event->GetTrack(vertexarray[indexes[i]].GetIndex(1));
51ad6848 3161 if (!ptrack0 || !ptrack1){
3162 printf("BBBBBBBUUUUUUUUUUGGGGGGGGGG\n");
3163 }
3164 Int_t v0index0[3]={ptrack0->GetV0Index(0),ptrack0->GetV0Index(1),ptrack0->GetV0Index(2)};
3165 Int_t v0index1[3]={ptrack1->GetV0Index(0),ptrack1->GetV0Index(1),ptrack1->GetV0Index(2)};
3166 for (Int_t i=0;i<3;i++){
3167 if (v0index0[i]<0) {
3168 v0index0[i]=v0index;
3169 ptrack0->SetV0Indexes(v0index0);
3170 break;
e43c066c 3171 }
51ad6848 3172 }
3173 for (Int_t i=0;i<3;i++){
3174 if (v0index1[i]<0) {
3175 v0index1[i]=v0index;
3176 ptrack1->SetV0Indexes(v0index1);
3177 break;
e43c066c 3178 }
51ad6848 3179 }
e43c066c 3180 }
4661fe35 3181 delete[] helixes;
51ad6848 3182 delete[] vertexarray;
3183 delete[] oldvertexarray;
e43c066c 3184}
3185
51ad6848 3186
3187Double_t AliITStrackerMI::FindBestPair(Int_t esdtrack0, Int_t esdtrack1, AliESDV0MI *vertex)
e43c066c 3188{
3189 //
3190 // try to find best pair from the tree of track hyp.
3191 //
3192 TObjArray * array0 = (TObjArray*)fTrackHypothesys.At(esdtrack0);
3193 Int_t entries0 = array0->GetEntriesFast();
3194 TObjArray * array1 = (TObjArray*)fTrackHypothesys.At(esdtrack1);
3195 Int_t entries1 = array1->GetEntriesFast();
51ad6848 3196 // Float_t primvertex[3]={GetX(),GetY(),GetZ()};
e43c066c 3197 //
3198 //
51ad6848 3199 //AliESDV0MI v0;
0703142d 3200 Double_t criticalradius = vertex->GetRr();
e43c066c 3201 //
51ad6848 3202 AliITStrackMI * track0= (AliITStrackMI*)array0->At(fBestTrackIndex[esdtrack0]);
3203 AliITStrackMI * track1= (AliITStrackMI*)array1->At(fBestTrackIndex[esdtrack1]);
3204 //
3205 // find the best tracks after decay point
e43c066c 3206 for (Int_t itrack0=0;itrack0<entries0;itrack0++){
51ad6848 3207 AliITStrackMI * track = (AliITStrackMI*)array0->At(itrack0);
3208 if (!track) continue;
3209 if (track->fX<criticalradius-1) continue;
3210 if (track->fX>criticalradius){
3211 track0 = track;
3212 break;
e43c066c 3213 }
3214 }
e43c066c 3215
51ad6848 3216 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
3217 AliITStrackMI * track = (AliITStrackMI*)array1->At(itrack1);
3218 if (!track) continue;
3219 if (track->fX<criticalradius-1) continue;
3220 if (track->fX>criticalradius){
3221 track1 = track;
3222 break;
3223 }
3224 }
3225 //propagate to vertex
0703142d 3226 Double_t alpha = TMath::ATan2(vertex->GetXr(1),vertex->GetXr(0));
3227 Double_t radius =TMath::Sqrt(vertex->GetXr(1)*vertex->GetXr(1)+vertex->GetXr(0)*vertex->GetXr(0));
51ad6848 3228 AliITStrackMI track0p = *track0;
3229 AliITStrackMI track1p = *track1;
3230 if (!track0p.Propagate(alpha,radius)) return 100000;
3231 if (!track1p.Propagate(alpha,radius)) return 100000;
3232 //track0p.Propagate(alpha,radius);
3233 //track1p.Propagate(alpha,radius);
3234 //
3235 //
3236 //vertex2->SetM(track0p);
3237 //vertex2->SetP(track1p);
3238 //vertex2->Update(primvertex);
3239 //
3240 AliHelix h0(track0p);
3241 AliHelix h1(track1p);
3242 Double_t distance = TestV0(&h0,&h1,vertex);
3243 Float_t v[3]={GetX(),GetY(),GetZ()};
3244 // vertex->Update(v,track0->fMass, track1->fMass);
3245 vertex->SetM(*track0);
3246 vertex->SetP(*track1);
3247 vertex->Update(v);
3248 Float_t sigma = TMath::Sqrt(track1p.GetSigmaY2()+track1p.GetSigmaZ2()+track0p.GetSigmaY2()+track0p.GetSigmaZ2());
0703142d 3249 vertex->SetDistNorm(distance/sigma);
3250 vertex->SetDistSigma(sigma);
51ad6848 3251 return distance;
e43c066c 3252}
3253
3254
3255
51ad6848 3256Double_t AliITStrackerMI::TestV0(AliHelix *helix1, AliHelix *helix2, AliESDV0MI *vertex)
e43c066c 3257{
3258 //
3259 // test the helixes for the distnce calculate vertex characteristic
3260 //
3261 Float_t distance1,distance2;
3262 AliHelix & dhelix1 = *helix1;
3263 Double_t pp[3],xx[3];
3264 dhelix1.GetMomentum(0,pp,0);
3265 dhelix1.Evaluate(0,xx);
3266 AliHelix &mhelix = *helix2;
3267 //
3268 //find intersection linear
3269 //
3270 Double_t phase[2][2],radius[2];
3271 Int_t points = dhelix1.GetRPHIintersections(mhelix, phase, radius);
3272 Double_t delta1=10000,delta2=10000;
3273
3274 if (points>0){
3275 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
3276 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
3277 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
3278 }
3279 if (points==2){
3280 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
3281 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
3282 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
3283 }
3284 distance1 = TMath::Min(delta1,delta2);
0703142d 3285 vertex->SetDist1(TMath::Sqrt(distance1));
e43c066c 3286 //
3287 //find intersection parabolic
3288 //
3289 points = dhelix1.GetRPHIintersections(mhelix, phase, radius);
3290 delta1=10000,delta2=10000;
3291
3292 if (points>0){
3293 dhelix1.ParabolicDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
3294 }
3295 if (points==2){
3296 dhelix1.ParabolicDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
3297 }
3298
3299 distance2 = TMath::Min(delta1,delta2);
0703142d 3300 vertex->SetDist2(TMath::Sqrt(distance2));
e43c066c 3301 if (distance2<100){
3302 if (delta1<delta2){
3303 //get V0 info
0703142d 3304 dhelix1.Evaluate(phase[0][0],vertex->GetXrp());
3305 dhelix1.GetMomentum(phase[0][0],vertex->GetPPp());
3306 mhelix.GetMomentum(phase[0][1],vertex->GetPMp());
3307 dhelix1.GetAngle(phase[0][0],mhelix,phase[0][1],vertex->GetAnglep());
3308 vertex->SetRr(TMath::Sqrt(radius[0]));
e43c066c 3309 }
3310 else{
0703142d 3311 dhelix1.Evaluate(phase[1][0],vertex->GetXrp());
3312 dhelix1.GetMomentum(phase[1][0],vertex->GetPPp());
3313 mhelix.GetMomentum(phase[1][1],vertex->GetPMp());
3314 dhelix1.GetAngle(phase[1][0],mhelix,phase[1][1],vertex->GetAnglep());
3315 vertex->SetRr(TMath::Sqrt(radius[1]));
e43c066c 3316 }
3317 }
3318 //
3319 //
0703142d 3320 return vertex->GetDist2();
e43c066c 3321}
3322
51ad6848 3323
3324
3325
3326
3327
3328