git://git.uio.no / u / mrichter / AliRoot.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Storing impact parameters in the ESD track (Yu.Belikov)
[u/mrichter/AliRoot.git] / ITS / AliITStrackerMI.cxx
CommitLineData
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//-------------------------------------------------------------------------
f43e383b 24#include "AliITSrecoV2.h"
e43c066c 25#include <TTree.h>
e43c066c 26#include "AliITSgeom.h"
e43c066c 27#include "AliESD.h"
28#include "AliITSclusterV2.h"
e43c066c 29#include "AliITStrackerMI.h"
30#include "TMatrixD.h"
51ad6848 31#include "TFile.h"
32#include "TTree.h"
e43c066c 33#include "AliHelix.h"
51ad6848 34#include "AliESDV0MI.h"
f43e383b 35
e43c066c 36
37ClassImp(AliITStrackerMI)
e43c066c 38
39
40
41AliITStrackerMI::AliITSlayer AliITStrackerMI::fgLayers[kMaxLayer]; // ITS layers
42
43AliITStrackerMI::AliITStrackerMI(const AliITSgeom *geom) : AliTracker() {
44 //--------------------------------------------------------------------
45 //This is the AliITStrackerMI constructor
46 //--------------------------------------------------------------------
47 AliITSgeom *g=(AliITSgeom*)geom;
48
49 Float_t x,y,z;
50 Int_t i;
51 for (i=1; i<kMaxLayer+1; i++) {
52 Int_t nlad=g->GetNladders(i);
53 Int_t ndet=g->GetNdetectors(i);
54
55 g->GetTrans(i,1,1,x,y,z);
56 Double_t r=TMath::Sqrt(x*x + y*y);
57 Double_t poff=TMath::ATan2(y,x);
58 Double_t zoff=z;
59
60 g->GetTrans(i,1,2,x,y,z);
61 r += TMath::Sqrt(x*x + y*y);
62 g->GetTrans(i,2,1,x,y,z);
63 r += TMath::Sqrt(x*x + y*y);
64 g->GetTrans(i,2,2,x,y,z);
65 r += TMath::Sqrt(x*x + y*y);
66 r*=0.25;
67
68 new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet);
69
70 for (Int_t j=1; j<nlad+1; j++) {
71 for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors
72 Float_t x,y,zshift; g->GetTrans(i,j,k,x,y,zshift);
73 Double_t rot[9]; g->GetRotMatrix(i,j,k,rot);
74
75 Double_t phi=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
76 phi+=TMath::Pi()/2;
77 if (i==1) phi+=TMath::Pi();
78 Double_t cp=TMath::Cos(phi), sp=TMath::Sin(phi);
79 Double_t r=x*cp+y*sp;
80
81 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
82 new(&det) AliITSdetector(r,phi);
83 }
84 }
85
86 }
87
88 fI=kMaxLayer;
89
90 fPass=0;
91 fConstraint[0]=1; fConstraint[1]=0;
92
93 Double_t xyz[]={kXV,kYV,kZV}, ers[]={kSigmaXV,kSigmaYV,kSigmaZV};
94 SetVertex(xyz,ers);
95
96 for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=kLayersNotToSkip[i];
97 fLastLayerToTrackTo=kLastLayerToTrackTo;
98
99}
100
101void AliITStrackerMI::SetLayersNotToSkip(Int_t *l) {
102 //--------------------------------------------------------------------
103 //This function set masks of the layers which must be not skipped
104 //--------------------------------------------------------------------
105 for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=l[i];
106}
107
108Int_t AliITStrackerMI::LoadClusters(TTree *cTree) {
109 //--------------------------------------------------------------------
110 //This function loads ITS clusters
111 //--------------------------------------------------------------------
112 TBranch *branch=cTree->GetBranch("Clusters");
113 if (!branch) {
114 Error("LoadClusters"," can't get the branch !\n");
115 return 1;
116 }
117
118 TClonesArray dummy("AliITSclusterV2",10000), *clusters=&dummy;
119 branch->SetAddress(&clusters);
120
121 Int_t j=0;
122 Int_t detector=0;
123 for (Int_t i=0; i<kMaxLayer; i++) {
124 Int_t ndet=fgLayers[i].GetNdetectors();
125 Int_t jmax = j + fgLayers[i].GetNladders()*ndet;
126 for (; j<jmax; j++) {
127 if (!cTree->GetEvent(j)) continue;
128 Int_t ncl=clusters->GetEntriesFast();
129 SignDeltas(clusters,GetZ());
130 while (ncl--) {
131 AliITSclusterV2 *c=(AliITSclusterV2*)clusters->UncheckedAt(ncl);
132 detector = c->GetDetectorIndex();
133 fgLayers[i].InsertCluster(new AliITSclusterV2(*c));
134 }
135 clusters->Delete();
136 //add dead zone virtual "cluster"
137 if (i<2){
138 for (Float_t ydead = 0; ydead < 1.31 ; ydead+=(i+1.)*0.018){
139 Int_t lab[4] = {0,0,0,detector};
140 Int_t info[3] = {0,0,0};
141 Float_t hit[5]={0,0,0.004/12.,0.001/12.,0};
142 if (i==0) hit[0] =ydead-0.4;
143 if (i==1) hit[0]=ydead-3.75;
144 hit[1] =-0.04;
145 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
146 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
147 hit[1]=-7.05;
148 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
149 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
150 hit[1]=-7.15;
151 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
152 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
153 hit[1] =0.06;
154 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
155 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
156 hit[1]=7.05;
157 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
158 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
159 hit[1]=7.25;
160 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
161 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
162 }
163 }
164
165 }
166 //
167 fgLayers[i].ResetRoad(); //road defined by the cluster density
168 fgLayers[i].SortClusters();
169 }
170
171 return 0;
172}
173
174void AliITStrackerMI::UnloadClusters() {
175 //--------------------------------------------------------------------
176 //This function unloads ITS clusters
177 //--------------------------------------------------------------------
178 for (Int_t i=0; i<kMaxLayer; i++) fgLayers[i].ResetClusters();
179}
180
15dd636f 181static Int_t CorrectForDeadZoneMaterial(AliITStrackMI *t) {
e43c066c 182 //--------------------------------------------------------------------
183 // Correction for the material between the TPC and the ITS
184 // (should it belong to the TPC code ?)
185 //--------------------------------------------------------------------
186 Double_t riw=80., diw=0.0053, x0iw=30; // TPC inner wall ?
187 Double_t rcd=61., dcd=0.0053, x0cd=30; // TPC "central drum" ?
188 Double_t yr=12.8, dr=0.03; // rods ?
189 Double_t zm=0.2, dm=0.40; // membrane
190 //Double_t rr=52., dr=0.19, x0r=24., yyr=7.77; //rails
191 Double_t rs=50., ds=0.001; // something belonging to the ITS (screen ?)
192
193 if (t->GetX() > riw) {
194 if (!t->PropagateTo(riw,diw,x0iw)) return 1;
195 if (TMath::Abs(t->GetY())>yr) t->CorrectForMaterial(dr);
196 if (TMath::Abs(t->GetZ())<zm) t->CorrectForMaterial(dm);
197 if (!t->PropagateTo(rcd,dcd,x0cd)) return 1;
198 //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z);
199 //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,dr,x0r);
200 if (!t->PropagateTo(rs,ds)) return 1;
201 } else if (t->GetX() < rs) {
202 if (!t->PropagateTo(rs,-ds)) return 1;
203 //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z);
204 //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,-dr,x0r);
205 if (!t->PropagateTo(rcd,-dcd,x0cd)) return 1;
206 if (!t->PropagateTo(riw+0.001,-diw,x0iw)) return 1;
207 } else {
208 ::Error("CorrectForDeadZoneMaterial","track is already in the dead zone !");
209 return 1;
210 }
211
212 return 0;
213}
214
215Int_t AliITStrackerMI::Clusters2Tracks(AliESD *event) {
216 //--------------------------------------------------------------------
217 // This functions reconstructs ITS tracks
218 // The clusters must be already loaded !
219 //--------------------------------------------------------------------
220 TObjArray itsTracks(15000);
221
222 {/* Read ESD tracks */
223 Int_t nentr=event->GetNumberOfTracks();
224 Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr);
225 while (nentr--) {
226 AliESDtrack *esd=event->GetTrack(nentr);
227
228 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue;
229 if (esd->GetStatus()&AliESDtrack::kTPCout) continue;
230 if (esd->GetStatus()&AliESDtrack::kITSin) continue;
51ad6848 231 if (esd->GetKinkIndex(0)>0) continue; //kink daughter
15dd636f 232 AliITStrackMI *t=0;
e43c066c 233 try {
15dd636f 234 t=new AliITStrackMI(*esd);
e43c066c 235 } catch (const Char_t *msg) {
236 Warning("Clusters2Tracks",msg);
237 delete t;
238 continue;
239 }
240 t->fD[0] = t->GetD(GetX(),GetY());
241 t->fD[1] = t->GetZat(GetX())-GetZ();
242 Double_t vdist = TMath::Sqrt(t->fD[0]*t->fD[0]+t->fD[1]*t->fD[1]);
243 if (t->GetMass()<0.13) t->SetMass(0.13957); // MI look to the esd - mass hypothesys !!!!!!!!!!!
244 // write expected q
245 t->fExpQ = TMath::Max(0.8*t->fESDtrack->GetTPCsignal(),30.);
246
247 if (TMath::Abs(t->fD[0])>10) {
248 delete t;
249 continue;
250 }
251
252 if (TMath::Abs(vdist)>20) {
253 delete t;
254 continue;
255 }
256 if (TMath::Abs(1/t->Get1Pt())<0.120) {
257 delete t;
258 continue;
259 }
260
261 if (CorrectForDeadZoneMaterial(t)!=0) {
262 Warning("Clusters2Tracks",
263 "failed to correct for the material in the dead zone !\n");
264 delete t;
265 continue;
266 }
267 t->fReconstructed = kFALSE;
268 itsTracks.AddLast(t);
269 }
270 } /* End Read ESD tracks */
271
272 itsTracks.Sort();
273 Int_t nentr=itsTracks.GetEntriesFast();
274 fTrackHypothesys.Expand(nentr);
275 MakeCoeficients(nentr);
276 Int_t ntrk=0;
277 for (fPass=0; fPass<2; fPass++) {
278 Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
279 for (Int_t i=0; i<nentr; i++) {
4c53440c 280// cerr<<fPass<<" "<<i<<'\r';
e43c066c 281 fCurrentEsdTrack = i;
15dd636f 282 AliITStrackMI *t=(AliITStrackMI*)itsTracks.UncheckedAt(i);
e43c066c 283 if (t==0) continue; //this track has been already tracked
284 if (t->fReconstructed&&(t->fNUsed<1.5)) continue; //this track was already "succesfully" reconstructed
285 if ( (TMath::Abs(t->GetD(GetX(),GetY())) >3.) && fConstraint[fPass]) continue;
286 if ( (TMath::Abs(t->GetZat(GetX())-GetZ())>3.) && fConstraint[fPass]) continue;
287
288 Int_t tpcLabel=t->GetLabel(); //save the TPC track label
289 fI = 6;
290 ResetTrackToFollow(*t);
291 ResetBestTrack();
292
293 FollowProlongationTree(t,i);
294
295
296 SortTrackHypothesys(fCurrentEsdTrack,20,0); //MI change
297 //
15dd636f 298 AliITStrackMI * besttrack = GetBestHypothesys(fCurrentEsdTrack,t,15);
e43c066c 299 if (!besttrack) continue;
300 besttrack->SetLabel(tpcLabel);
301 // besttrack->CookdEdx();
302 CookdEdx(besttrack);
303 besttrack->fFakeRatio=1.;
304 CookLabel(besttrack,0.); //For comparison only
305 // besttrack->UpdateESDtrack(AliESDtrack::kITSin);
306 //
307
308 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
309
310 if ( besttrack->GetNumberOfClusters()<5 && fConstraint[fPass]) {
311 continue;
312 }
313 if (besttrack->fChi2MIP[0]+besttrack->fNUsed>3.5) continue;
314 if ( (TMath::Abs(besttrack->fD[0]*besttrack->fD[0]+besttrack->fD[1]*besttrack->fD[1])>0.1) && fConstraint[fPass]) continue;
315 //delete itsTracks.RemoveAt(i);
316 t->fReconstructed = kTRUE;
317 ntrk++;
318 }
319 GetBestHypothesysMIP(itsTracks);
320 }
321
322 //GetBestHypothesysMIP(itsTracks);
51ad6848 323 FindV0(event);
e43c066c 324
325 itsTracks.Delete();
326 //
327 Int_t entries = fTrackHypothesys.GetEntriesFast();
328 for (Int_t ientry=0;ientry<entries;ientry++){
329 TObjArray * array =(TObjArray*)fTrackHypothesys.UncheckedAt(ientry);
330 if (array) array->Delete();
331 delete fTrackHypothesys.RemoveAt(ientry);
332 }
333
334 fTrackHypothesys.Delete();
335 Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk);
336
337 return 0;
338}
339
340
e43c066c 341Int_t AliITStrackerMI::PropagateBack(AliESD *event) {
342 //--------------------------------------------------------------------
343 // This functions propagates reconstructed ITS tracks back
344 // The clusters must be loaded !
345 //--------------------------------------------------------------------
346 Int_t nentr=event->GetNumberOfTracks();
347 Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
348
349 Int_t ntrk=0;
350 for (Int_t i=0; i<nentr; i++) {
351 AliESDtrack *esd=event->GetTrack(i);
352
353 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
354 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
355
15dd636f 356 AliITStrackMI *t=0;
e43c066c 357 try {
15dd636f 358 t=new AliITStrackMI(*esd);
e43c066c 359 } catch (const Char_t *msg) {
360 Warning("PropagateBack",msg);
361 delete t;
362 continue;
363 }
364 t->fExpQ = TMath::Max(0.8*t->fESDtrack->GetTPCsignal(),30.);
365
366 ResetTrackToFollow(*t);
367
368 // propagete to vertex [SR, GSI 17.02.2003]
369 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
370 if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {
371 if (fTrackToFollow.PropagateToVertex()) {
372 fTrackToFollow.StartTimeIntegral();
373 }
374 fTrackToFollow.PropagateTo(3.,-0.0028,65.19);
375 }
376
377 fTrackToFollow.ResetCovariance(); fTrackToFollow.ResetClusters();
378 if (RefitAt(49.,&fTrackToFollow,t)) {
379 if (CorrectForDeadZoneMaterial(&fTrackToFollow)!=0) {
380 Warning("PropagateBack",
381 "failed to correct for the material in the dead zone !\n");
382 delete t;
383 continue;
384 }
385 fTrackToFollow.SetLabel(t->GetLabel());
386 //fTrackToFollow.CookdEdx();
387 CookLabel(&fTrackToFollow,0.); //For comparison only
388 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
389 //UseClusters(&fTrackToFollow);
390 ntrk++;
391 }
392 delete t;
393 }
394
395 Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk);
396
397 return 0;
398}
399
400Int_t AliITStrackerMI::RefitInward(AliESD *event) {
401 //--------------------------------------------------------------------
402 // This functions refits ITS tracks using the
403 // "inward propagated" TPC tracks
404 // The clusters must be loaded !
405 //--------------------------------------------------------------------
406 Int_t nentr=event->GetNumberOfTracks();
407 Info("RefitInward", "Number of ESD tracks: %d\n", nentr);
408
409 Int_t ntrk=0;
410 for (Int_t i=0; i<nentr; i++) {
411 AliESDtrack *esd=event->GetTrack(i);
412
413 if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
414 if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
415 if (esd->GetStatus()&AliESDtrack::kTPCout)
416 if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
417
15dd636f 418 AliITStrackMI *t=0;
e43c066c 419 try {
15dd636f 420 t=new AliITStrackMI(*esd);
e43c066c 421 } catch (const Char_t *msg) {
422 Warning("RefitInward",msg);
423 delete t;
424 continue;
425 }
426 t->fExpQ = TMath::Max(0.8*t->fESDtrack->GetTPCsignal(),30.);
427 if (CorrectForDeadZoneMaterial(t)!=0) {
428 Warning("RefitInward",
429 "failed to correct for the material in the dead zone !\n");
430 delete t;
431 continue;
432 }
433
434 ResetTrackToFollow(*t);
435 fTrackToFollow.ResetClusters();
436
437 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
438 fTrackToFollow.ResetCovariance();
439
440 //Refitting...
441 if (RefitAt(3.7, &fTrackToFollow, t)) {
442 fTrackToFollow.SetLabel(t->GetLabel());
443 // fTrackToFollow.CookdEdx();
444 CookdEdx(&fTrackToFollow);
445
446 CookLabel(&fTrackToFollow,0.0); //For comparison only
447
448 if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {//The beam pipe
449 Double_t a=fTrackToFollow.GetAlpha();
450 Double_t cs=TMath::Cos(a),sn=TMath::Sin(a);
451 Double_t xv= GetX()*cs + GetY()*sn;
452 Double_t yv=-GetX()*sn + GetY()*cs;
453
454 Double_t c=fTrackToFollow.GetC(), snp=fTrackToFollow.GetSnp();
455 Double_t x=fTrackToFollow.GetX(), y=fTrackToFollow.GetY();
456 Double_t tgfv=-(c*(x-xv)-snp)/(c*(y-yv) + TMath::Sqrt(1.-snp*snp));
457 Double_t fv=TMath::ATan(tgfv);
458
459 cs=TMath::Cos(fv); sn=TMath::Sin(fv);
460 x = xv*cs + yv*sn;
461 yv=-xv*sn + yv*cs; xv=x;
462
463 if (fTrackToFollow.Propagate(fv+a,xv)) {
464 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit);
399fb957 465 Float_t d=fTrackToFollow.GetD(GetX(),GetY());
466 Float_t z=fTrackToFollow.GetZ()-GetZ();
467 fTrackToFollow.GetESDtrack()->SetImpactParameters(d,z);
e43c066c 468 //UseClusters(&fTrackToFollow);
469 {
470 AliITSclusterV2 c; c.SetY(yv); c.SetZ(GetZ());
471 c.SetSigmaY2(GetSigmaY()*GetSigmaY());
472 c.SetSigmaZ2(GetSigmaZ()*GetSigmaZ());
473 Double_t chi2=fTrackToFollow.GetPredictedChi2(&c);
474 //Double_t chi2=GetPredictedChi2MI(&fTrackToFollow,&c,fI);
475 if (chi2<kMaxChi2)
476 if (fTrackToFollow.Update(&c,-chi2,0))
477 //if (UpdateMI(&fTrackToFollow,&c,-chi2,0))
478 fTrackToFollow.SetConstrainedESDtrack(chi2);
479 }
480 ntrk++;
481 }
482 }
483 }
484 delete t;
485 }
486
487 Info("RefitInward","Number of refitted tracks: %d\n",ntrk);
488
489 return 0;
490}
491
492AliCluster *AliITStrackerMI::GetCluster(Int_t index) const {
493 //--------------------------------------------------------------------
494 // Return pointer to a given cluster
495 //--------------------------------------------------------------------
496 Int_t l=(index & 0xf0000000) >> 28;
497 Int_t c=(index & 0x0fffffff) >> 00;
498 return fgLayers[l].GetCluster(c);
499}
500
501
15dd636f 502void AliITStrackerMI::FollowProlongationTree(AliITStrackMI * otrack, Int_t esdindex)
e43c066c 503{
504 //--------------------------------------------------------------------
505 // Follow prolongation tree
506 //--------------------------------------------------------------------
507
508 //setup tree of the prolongations
509 //
15dd636f 510 static AliITStrackMI tracks[7][100];
511 AliITStrackMI *currenttrack;
512 static AliITStrackMI currenttrack1;
513 static AliITStrackMI currenttrack2;
514 static AliITStrackMI backuptrack;
e43c066c 515 Int_t ntracks[7];
516 Int_t nindexes[7][100];
517 Float_t normalizedchi2[100];
518 for (Int_t ilayer=0;ilayer<6;ilayer++) ntracks[ilayer]=0;
519 otrack->fNSkipped=0;
15dd636f 520 new (&(tracks[6][0])) AliITStrackMI(*otrack);
e43c066c 521 ntracks[6]=1;
522 nindexes[6][0]=0;
523 //
524 //
525 // follow prolongations
526 for (Int_t ilayer=5;ilayer>=0;ilayer--){
527 //
528 AliITSlayer &layer=fgLayers[ilayer];
529 Double_t r=layer.GetR();
530 ntracks[ilayer]=0;
531 //
532 //
533 Int_t nskipped=0;
534 Float_t nused =0;
535 for (Int_t itrack =0;itrack<ntracks[ilayer+1];itrack++){
536 //set current track
537 if (ntracks[ilayer]>=100) break;
538 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].fNSkipped>0) nskipped++;
539 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].fNUsed>2.) nused++;
540 if (ntracks[ilayer]>15+ilayer){
541 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].fNSkipped>0 && nskipped>4+ilayer) continue;
542 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].fNUsed>2. && nused>3) continue;
543 }
544
15dd636f 545 new(&currenttrack1) AliITStrackMI(tracks[ilayer+1][nindexes[ilayer+1][itrack]]);
e43c066c 546 if (ilayer==3 || ilayer==1) {
547 Double_t rs=0.5*(fgLayers[ilayer+1].GetR() + r);
548 Double_t d=0.0034, x0=38.6;
549 if (ilayer==1) {rs=9.; d=0.0097; x0=42;}
550 if (!currenttrack1.PropagateTo(rs,d,x0)) {
551 continue;
552 }
553 }
554 //
555 //find intersection with layer
556 Double_t x,y,z;
557 if (!currenttrack1.GetGlobalXYZat(r,x,y,z)) {
558 continue;
559 }
560 Double_t phi=TMath::ATan2(y,x);
561 Int_t idet=layer.FindDetectorIndex(phi,z);
562 if (idet<0) {
563 continue;
564 }
565 //propagate to the intersection
566 const AliITSdetector &det=layer.GetDetector(idet);
567 phi=det.GetPhi();
15dd636f 568 new(&currenttrack2) AliITStrackMI(currenttrack1);
e43c066c 569 if (!currenttrack1.Propagate(phi,det.GetR())) {
570 continue;
571 }
572 currenttrack2.Propagate(phi,det.GetR()); //
573 currenttrack1.SetDetectorIndex(idet);
574 currenttrack2.SetDetectorIndex(idet);
575
576 //
577 //
578 Double_t dz=7.5*TMath::Sqrt(currenttrack1.GetSigmaZ2() + 16.*kSigmaZ2[ilayer]);
579 Double_t dy=7.5*TMath::Sqrt(currenttrack1.GetSigmaY2() + 16.*kSigmaY2[ilayer]);
580 //
581 Bool_t isBoundary=kFALSE;
582 if (currenttrack1.GetY()-dy< det.GetYmin()+0.2) isBoundary = kTRUE;
583 if (currenttrack1.GetY()+dy> det.GetYmax()-0.2) isBoundary = kTRUE;
584 if (currenttrack1.GetZ()-dz< det.GetZmin()+0.2) isBoundary = kTRUE;
585 if (currenttrack1.GetZ()+dz> det.GetZmax()-0.2) isBoundary = kTRUE;
586
587 if (isBoundary){ // track at boundary between detectors
588 Float_t maxtgl = TMath::Abs(currenttrack1.GetTgl());
589 if (maxtgl>1) maxtgl=1;
590 dz = TMath::Sqrt(dz*dz+0.25*maxtgl*maxtgl);
591 //
592 Float_t maxsnp = TMath::Abs(currenttrack1.GetSnp());
593 if (maxsnp>0.95) continue;
594 //if (maxsnp>0.5) maxsnp=0.5;
595 dy=TMath::Sqrt(dy*dy+0.25*maxsnp*maxsnp);
596 }
597
598 Double_t zmin=currenttrack1.GetZ() - dz;
599 Double_t zmax=currenttrack1.GetZ() + dz;
600 Double_t ymin=currenttrack1.GetY() + r*phi - dy;
601 Double_t ymax=currenttrack1.GetY() + r*phi + dy;
602 layer.SelectClusters(zmin,zmax,ymin,ymax);
603 //
604 // loop over all possible prolongations
605 //
606 Double_t msz=1./((currenttrack1.GetSigmaZ2() + 16.*kSigmaZ2[ilayer]));
607 Double_t msy=1./((currenttrack1.GetSigmaY2() + 16.*kSigmaY2[ilayer]));
608 if (fConstraint[fPass]){
609 msy/=60; msz/=60.;
610 }
611 else{
612 msy/=50; msz/=50.;
613 }
614 //
615 const AliITSclusterV2 *c=0; Int_t ci=-1;
616 Double_t chi2=12345.;
617 Int_t deadzone=0;
618 currenttrack = &currenttrack1;
619 while ((c=layer.GetNextCluster(ci))!=0) {
620 if (ntracks[ilayer]>95) break; //space for skipped clusters
621 Bool_t change =kFALSE;
622 if (c->GetQ()==0 && (deadzone==1)) continue;
623 Int_t idet=c->GetDetectorIndex();
624 if (currenttrack->GetDetectorIndex()!=idet) {
625 const AliITSdetector &det=layer.GetDetector(idet);
626 Double_t y,z;
627 if (!currenttrack2.GetProlongationFast(det.GetPhi(),det.GetR(),y,z)) continue;
628 Float_t pz = (z - c->GetZ()) , py=(y - c->GetY());
629 if (pz*pz*msz+py*py*msy>1.) continue;
630 //
15dd636f 631 new (&backuptrack) AliITStrackMI(currenttrack2);
e43c066c 632 change = kTRUE;
633 currenttrack =&currenttrack2;
634 if (!currenttrack->Propagate(det.GetPhi(),det.GetR())) {
15dd636f 635 new (currenttrack) AliITStrackMI(backuptrack);
e43c066c 636 change = kFALSE;
637 continue;
638 }
639 currenttrack->SetDetectorIndex(idet);
640 }
641 else{
642 Float_t pz = (currenttrack->GetZ() - c->GetZ()) , py=(currenttrack->GetY() - c->GetY());
643 if (pz*pz*msz+py*py*msy>1.) continue;
644 }
645
646 chi2=GetPredictedChi2MI(currenttrack,c,ilayer);
647 if (chi2<kMaxChi2s[ilayer]){
648 if (c->GetQ()==0) deadzone=1; // take dead zone only once
649 if (ntracks[ilayer]>=100) continue;
15dd636f 650 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
e43c066c 651 updatetrack->fClIndex[ilayer]=0;
652 if (change){
15dd636f 653 new (&currenttrack2) AliITStrackMI(backuptrack);
e43c066c 654 }
655 if (c->GetQ()!=0){
656 if (!UpdateMI(updatetrack,c,chi2,(ilayer<<28)+ci)) continue;
657 updatetrack->SetSampledEdx(c->GetQ(),updatetrack->GetNumberOfClusters()-1); //b.b.
658 }
659 else {
660 updatetrack->fNDeadZone++;
661 updatetrack->fDeadZoneProbability=GetDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2()));
662 }
663 if (c->IsUsed()){
664 updatetrack->fNUsed++;
665 }
666 Double_t x0;
667 Double_t d=layer.GetThickness(updatetrack->GetY(),updatetrack->GetZ(),x0);
668 updatetrack->CorrectForMaterial(d,x0);
669 if (fConstraint[fPass]) {
670 updatetrack->fConstrain = fConstraint[fPass];
671 fI = ilayer;
672 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
673 Double_t xyz[]={GetX(),GetY(),GetZ()};
674 Double_t ptfactor = 1;
675 Double_t ers[]={GetSigmaX()*ptfactor,GetSigmaY()*ptfactor,GetSigmaZ()};
676 Bool_t isPrim = kTRUE;
677 if (ilayer<4){
678 updatetrack->fD[0] = updatetrack->GetD(GetX(),GetY());
679 updatetrack->fD[1] = updatetrack->GetZat(GetX())-GetZ();
680 if ( TMath::Abs(updatetrack->fD[0]/(1.+ilayer))>0.4 || TMath::Abs(updatetrack->fD[1]/(1.+ilayer))>0.4) isPrim=kFALSE;
681 }
682 if (isPrim) updatetrack->Improve(d,xyz,ers);
683 } //apply vertex constrain
684 ntracks[ilayer]++;
685 } // create new hypothesy
686 } // loop over possible cluster prolongation
687 // if (fConstraint[fPass]&&itrack<2&&currenttrack1.fNSkipped==0 && deadzone==0){
688 if (itrack<2&&currenttrack1.fNSkipped==0 && deadzone==0&&ntracks[ilayer]<100){
15dd636f 689 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
e43c066c 690 vtrack->fClIndex[ilayer]=0;
691 fI = ilayer;
692 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
693 Double_t xyz[]={GetX(),GetY(),GetZ()};
694 Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
695 vtrack->Improve(d,xyz,ers);
696 vtrack->fNSkipped++;
697 ntracks[ilayer]++;
698 }
699
700 } //loop over track candidates
701 //
702 //
703 Int_t accepted=0;
704
705 Int_t golds=0;
706 for (Int_t itrack=0;itrack<ntracks[ilayer];itrack++){
707 normalizedchi2[itrack] = NormalizedChi2(&tracks[ilayer][itrack],ilayer);
708 if ( normalizedchi2[itrack]<3+0.5*ilayer) golds++;
709 if (ilayer>4) accepted++;
710 else{
711 if ( fConstraint[fPass] && normalizedchi2[itrack]<kMaxNormChi2C[ilayer]+1) accepted++;
712 if (!fConstraint[fPass] && normalizedchi2[itrack]<kMaxNormChi2NonC[ilayer]+1) accepted++;
713 }
714 }
715 TMath::Sort(ntracks[ilayer],normalizedchi2,nindexes[ilayer],kFALSE);
716 ntracks[ilayer] = TMath::Min(accepted,7+2*ilayer);
717 if (ntracks[ilayer]<golds+2+ilayer) ntracks[ilayer]=TMath::Min(golds+2+ilayer,accepted);
718 if (ntracks[ilayer]>90) ntracks[ilayer]=90;
719 } //loop over layers
720 //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]);
721
722 for (Int_t i=0;i<TMath::Min(20,ntracks[0]);i++) {
15dd636f 723 AliITStrackMI & track= tracks[0][nindexes[0][i]];
e43c066c 724 if (!fConstraint[fPass]&&track.fNormChi2[0]>7.)continue;
15dd636f 725 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
e43c066c 726 }
727 for (Int_t i=0;i<TMath::Min(4,ntracks[1]);i++) {
15dd636f 728 AliITStrackMI & track= tracks[1][nindexes[1][i]];
e43c066c 729 if (track.GetNumberOfClusters()<4) continue;
730 if (!fConstraint[fPass]&&track.fNormChi2[1]>7.)continue;
731 if (fConstraint[fPass]) track.fNSkipped+=1;
732 if (!fConstraint[fPass]) {
733 track.fD[0] = track.GetD(GetX(),GetY());
4c53440c 734 track.fNSkipped+=4./(4.+8.*TMath::Abs(track.fD[0]));
e43c066c 735 if (track.fN+track.fNDeadZone+track.fNSkipped>6) {
736 track.fNSkipped = 6-track.fN+track.fNDeadZone;
737 }
738 }
15dd636f 739 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
e43c066c 740 }
741 //}
742
743 if (!fConstraint[fPass]){
744 for (Int_t i=0;i<TMath::Min(3,ntracks[2]);i++) {
15dd636f 745 AliITStrackMI & track= tracks[2][nindexes[2][i]];
e43c066c 746 if (track.GetNumberOfClusters()<4) continue;
747 if (!fConstraint[fPass]&&track.fNormChi2[2]>7.)continue;
748 if (fConstraint[fPass]) track.fNSkipped+=2;
749 if (!fConstraint[fPass]){
750 track.fD[0] = track.GetD(GetX(),GetY());
4c53440c 751 track.fNSkipped+= 7./(7.+8.*TMath::Abs(track.fD[0]));
e43c066c 752 if (track.fN+track.fNDeadZone+track.fNSkipped>6) {
753 track.fNSkipped = 6-track.fN+track.fNDeadZone;
754 }
755 }
15dd636f 756 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
e43c066c 757 }
758 }
759}
760
761
762AliITStrackerMI::AliITSlayer & AliITStrackerMI::GetLayer(Int_t layer) const
763{
764 //--------------------------------------------------------------------
765 //
766 //
767 return fgLayers[layer];
768}
769AliITStrackerMI::AliITSlayer::AliITSlayer() {
770 //--------------------------------------------------------------------
771 //default AliITSlayer constructor
772 //--------------------------------------------------------------------
773 fN=0;
774 fDetectors=0;
775 fSkip = 0;
776 fCurrentSlice=-1;
777 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
778 fClusterWeight[i]=0;
779 fClusterTracks[0][i]=-1;
780 fClusterTracks[1][i]=-1;
781 fClusterTracks[2][i]=-1;
782 fClusterTracks[3][i]=-1;
783 }
784}
785
786AliITStrackerMI::AliITSlayer::
787AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd) {
788 //--------------------------------------------------------------------
789 //main AliITSlayer constructor
790 //--------------------------------------------------------------------
791 fR=r; fPhiOffset=p; fZOffset=z;
792 fNladders=nl; fNdetectors=nd;
793 fDetectors=new AliITSdetector[fNladders*fNdetectors];
794
795 fN=0;
796 fI=0;
797 fSkip = 0;
798 fRoad=2*fR*TMath::Sqrt(3.14/1.);//assuming that there's only one cluster
799}
800
801AliITStrackerMI::AliITSlayer::~AliITSlayer() {
802 //--------------------------------------------------------------------
803 // AliITSlayer destructor
804 //--------------------------------------------------------------------
805 delete[] fDetectors;
806 for (Int_t i=0; i<fN; i++) delete fClusters[i];
807 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
808 fClusterWeight[i]=0;
809 fClusterTracks[0][i]=-1;
810 fClusterTracks[1][i]=-1;
811 fClusterTracks[2][i]=-1;
812 fClusterTracks[3][i]=-1;
813 }
814}
815
816void AliITStrackerMI::AliITSlayer::ResetClusters() {
817 //--------------------------------------------------------------------
818 // This function removes loaded clusters
819 //--------------------------------------------------------------------
820 for (Int_t i=0; i<fN; i++) delete fClusters[i];
821 for (Int_t i=0; i<kMaxClusterPerLayer;i++){
822 fClusterWeight[i]=0;
823 fClusterTracks[0][i]=-1;
824 fClusterTracks[1][i]=-1;
825 fClusterTracks[2][i]=-1;
826 fClusterTracks[3][i]=-1;
827 }
828
829 fN=0;
830 fI=0;
831}
832
833void AliITStrackerMI::AliITSlayer::ResetWeights() {
834 //--------------------------------------------------------------------
835 // This function reset weights of the clusters
836 //--------------------------------------------------------------------
837 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
838 fClusterWeight[i]=0;
839 fClusterTracks[0][i]=-1;
840 fClusterTracks[1][i]=-1;
841 fClusterTracks[2][i]=-1;
842 fClusterTracks[3][i]=-1;
843 }
844 for (Int_t i=0; i<fN;i++) {
845 AliITSclusterV2 * cl = (AliITSclusterV2*)GetCluster(i);
846 if (cl&&cl->IsUsed()) cl->Use();
847 }
848
849}
850
851void AliITStrackerMI::AliITSlayer::ResetRoad() {
852 //--------------------------------------------------------------------
853 // This function calculates the road defined by the cluster density
854 //--------------------------------------------------------------------
855 Int_t n=0;
856 for (Int_t i=0; i<fN; i++) {
857 if (TMath::Abs(fClusters[i]->GetZ())<fR) n++;
858 }
859 //if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n);
860 if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n);
861}
862
863Int_t AliITStrackerMI::AliITSlayer::InsertCluster(AliITSclusterV2 *c) {
864 //--------------------------------------------------------------------
865 //This function adds a cluster to this layer
866 //--------------------------------------------------------------------
867 if (fN==kMaxClusterPerLayer) {
868 ::Error("InsertCluster","Too many clusters !\n");
869 return 1;
870 }
871 fCurrentSlice=-1;
872 if (fN==0) {fClusters[fN++]=c; return 0;}
873 Int_t i=FindClusterIndex(c->GetZ());
874 memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliITSclusterV2*));
875 memmove(fY+i+1 ,fY+i,(fN-i)*sizeof(Float_t));
876 memmove(fZ+i+1 ,fZ+i,(fN-i)*sizeof(Float_t));
877 fClusters[i]=c; fN++;
878 //
879 AliITSdetector &det=GetDetector(c->GetDetectorIndex());
880 Double_t y=fR*det.GetPhi() + c->GetY();
881 if (y>2.*fR*TMath::Pi()) y -= 2.*fR*TMath::Pi();
882 fY[i] = y;
883 fZ[i] = c->GetZ();
884 if (c->GetY()<det.GetYmin()) det.SetYmin(c->GetY());
885 if (c->GetY()>det.GetYmax()) det.SetYmax(c->GetY());
886 if (c->GetZ()<det.GetZmin()) det.SetZmin(c->GetZ());
887 if (c->GetZ()>det.GetZmax()) det.SetZmax(c->GetZ());
888
889 return 0;
890}
891
892void AliITStrackerMI::AliITSlayer::SortClusters()
893{
894 //
895 //sort clusters
896 //
897 fYB[0]=10000000;
898 fYB[1]=-10000000;
899 for (Int_t i=0;i<fN;i++){
900 if (fY[i]<fYB[0]) fYB[0]=fY[i];
901 if (fY[i]>fYB[1]) fYB[1]=fY[i];
902 fClusterIndex[i] = i;
903 }
904 //
905 // fill slices
906 fDy5 = (fYB[1]-fYB[0])/5.;
907 fDy10 = (fYB[1]-fYB[0])/10.;
908 fDy20 = (fYB[1]-fYB[0])/20.;
909 for (Int_t i=0;i<6;i++) fN5[i] =0;
910 for (Int_t i=0;i<11;i++) fN10[i]=0;
911 for (Int_t i=0;i<21;i++) fN20[i]=0;
912 //
913 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;}
914 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;}
915 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;}
916 //
917 //
918 for (Int_t i=0;i<fN;i++) for (Int_t irot=-1;irot<=1;irot++){
919 Float_t curY = fY[i]+irot*2.*TMath::Pi()*fR;
920 if (curY<fYB[0]-fDy5) continue;
921 if (curY>fYB[1]+fDy5) continue;
922 //
923 // slice 10
db3f8691 924 if (TMath::Abs(fYB[1]-fYB[0])<=0) continue;
e43c066c 925 Float_t fslice = TMath::Nint(10.*(curY-fYB[0])/(fYB[1]-fYB[0]));
926 Float_t ymiddle = fYB[0]+fslice*fDy10;
927 for (Int_t di =-1;di<=1;di++){
928 if (TMath::Abs(curY-(ymiddle+(float)di*fDy10))<0.75*fDy10){
929 //
930 Int_t slice = int(fslice+21.0001)-21+di;
931 if (slice<0) continue;
932 if (slice>10) continue;
2a03f170 933 if (fN10[slice]>=kMaxClusterPerLayer10) break;
e43c066c 934 fClusters10[slice][fN10[slice]] = fClusters[i];
935 fY10[slice][fN10[slice]] = curY;
936 fZ10[slice][fN10[slice]] = fZ[i];
937 fClusterIndex10[slice][fN10[slice]]=i;
938 fN10[slice]++;
939 }
940 }
941 //
942 // slice 5
943 fslice = TMath::Nint(5.*(curY-fYB[0])/(fYB[1]-fYB[0]));
944 ymiddle = fYB[0]+fslice*fDy5;
945 for (Int_t di =-1;di<=1;di++){
946 if (TMath::Abs(curY-(ymiddle+(float)di*fDy5))<0.75*fDy5){
947 //
948 Int_t slice = int(fslice+21.0001)-21+di;
949 if (slice<0) continue;
950 if (slice>5) continue;
2a03f170 951 if (fN5[slice]>=kMaxClusterPerLayer5) break;
e43c066c 952 fClusters5[slice][fN5[slice]] = fClusters[i];
953 fY5[slice][fN5[slice]] = curY;
954 fZ5[slice][fN5[slice]] = fZ[i];
955 fClusterIndex5[slice][fN5[slice]]=i;
956 fN5[slice]++;
957 }
958 }
959 //
960 // slice 20
961 fslice = TMath::Nint(20.*(curY-fYB[0])/(fYB[1]-fYB[0]));
962 ymiddle = fYB[0]+fslice*fDy20;
963 for (Int_t di =-1;di<=1;di++){
964 if (TMath::Abs(curY-(ymiddle+(float)di*fDy20))<0.75*fDy20){
965 //
966 Int_t slice = int(fslice+21.0001)-21+di;
967 if (slice<0) continue;
968 if (slice>20) continue;
2a03f170 969 if (fN20[slice]>=kMaxClusterPerLayer20) break;
e43c066c 970 fClusters20[slice][fN20[slice]] = fClusters[i];
971 fY20[slice][fN20[slice]] = curY;
972 fZ20[slice][fN20[slice]] = fZ[i];
973 fClusterIndex20[slice][fN20[slice]]=i;
974 fN20[slice]++;
975 }
976 }
977 }
978}
979
980
981
982
983Int_t AliITStrackerMI::AliITSlayer::FindClusterIndex(Float_t z) const {
984 //--------------------------------------------------------------------
985 // This function returns the index of the nearest cluster
986 //--------------------------------------------------------------------
987 Int_t ncl=0;
988 const Float_t *zcl;
989 if (fCurrentSlice<0) {
990 ncl = fN;
991 zcl = fZ;
992 }
993 else{
994 ncl = fNcs;
995 zcl = fZcs;;
996 }
997
998 if (ncl==0) return 0;
999 Int_t b=0, e=ncl-1, m=(b+e)/2;
1000 for (; b<e; m=(b+e)/2) {
1001 // if (z > fClusters[m]->GetZ()) b=m+1;
1002 if (z > zcl[m]) b=m+1;
1003 else e=m;
1004 }
1005 return m;
1006}
1007/*
1008void AliITStrackerMI::AliITSlayer::
1009SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1010 //--------------------------------------------------------------------
1011 // This function sets the "window"
1012 //--------------------------------------------------------------------
1013 fI=FindClusterIndex(zmin); fZmax=zmax;
1014 fImax = TMath::Min(FindClusterIndex(zmax)+1,fN);
1015 Double_t circle=2*TMath::Pi()*fR;
1016 if (ymax>circle) { ymax-=circle; ymin-=circle; }
1017 fYmin=ymin; fYmax=ymax;
1018 fSkip = 0;
1019}
1020*/
1021
1022
1023void AliITStrackerMI::AliITSlayer::
1024SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1025 //--------------------------------------------------------------------
1026 // This function sets the "window"
1027 //--------------------------------------------------------------------
1028
1029 Double_t circle=2*TMath::Pi()*fR;
1030 fYmin = ymin; fYmax =ymax;
1031 Float_t ymiddle = (fYmin+fYmax)*0.5;
1032 if (ymiddle<fYB[0]) {fYmin+=circle; fYmax+=circle;ymiddle+=circle;}
1033 else{
1034 if (ymiddle>fYB[1]) {fYmin-=circle; fYmax-=circle;ymiddle-=circle;}
1035 }
1036 //
1037 fCurrentSlice =-1;
1038 // defualt take all
1039 fClustersCs = fClusters;
1040 fClusterIndexCs = fClusterIndex;
1041 fYcs = fY;
1042 fZcs = fZ;
1043 fNcs = fN;
1044 //
1045 //is in 20 slice?
1046 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy20){
1047 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy20);
1048 if (slice<0) slice=0;
1049 if (slice>20) slice=20;
1050 Bool_t isOK = (fYmin>fBy20[slice][0]&&fYmax<fBy20[slice][1]);
1051 if (isOK) {
1052 fCurrentSlice=slice;
1053 fClustersCs = fClusters20[fCurrentSlice];
1054 fClusterIndexCs = fClusterIndex20[fCurrentSlice];
1055 fYcs = fY20[fCurrentSlice];
1056 fZcs = fZ20[fCurrentSlice];
1057 fNcs = fN20[fCurrentSlice];
1058 }
1059 }
1060 //
1061 //is in 10 slice?
1062 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy10){
1063 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy10);
1064 if (slice<0) slice=0;
1065 if (slice>10) slice=10;
1066 Bool_t isOK = (fYmin>fBy10[slice][0]&&fYmax<fBy10[slice][1]);
1067 if (isOK) {
1068 fCurrentSlice=slice;
1069 fClustersCs = fClusters10[fCurrentSlice];
1070 fClusterIndexCs = fClusterIndex10[fCurrentSlice];
1071 fYcs = fY10[fCurrentSlice];
1072 fZcs = fZ10[fCurrentSlice];
1073 fNcs = fN10[fCurrentSlice];
1074 }
1075 }
1076 //
1077 //is in 5 slice?
1078 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy5){
1079 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy5);
1080 if (slice<0) slice=0;
1081 if (slice>5) slice=5;
1082 Bool_t isOK = (fYmin>fBy5[slice][0]&&fYmax<fBy5[slice][1]);
1083 if ( isOK){
1084 fCurrentSlice=slice;
1085 fClustersCs = fClusters5[fCurrentSlice];
1086 fClusterIndexCs = fClusterIndex5[fCurrentSlice];
1087 fYcs = fY5[fCurrentSlice];
1088 fZcs = fZ5[fCurrentSlice];
1089 fNcs = fN5[fCurrentSlice];
1090 }
1091 }
1092 //
1093 fI=FindClusterIndex(zmin); fZmax=zmax;
1094 fImax = TMath::Min(FindClusterIndex(zmax)+1,fNcs);
1095 fSkip = 0;
1096 fAccepted =0;
1097}
1098
1099/*
1100const AliITSclusterV2 *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci){
1101 //--------------------------------------------------------------------
1102 // This function returns clusters within the "window"
1103 //--------------------------------------------------------------------
1104 const AliITSclusterV2 *cluster=0;
1105 for (Int_t i=fI; i<fN; i++) {
1106 const AliITSclusterV2 *c=fClusters[i];
1107 if (c->GetZ() > fZmax) break;
1108 // if (c->IsUsed()) continue;
1109 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
1110 Double_t y=fR*det.GetPhi() + c->GetY();
1111
1112 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
1113 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
1114
1115 if (y<fYmin) continue;
1116 if (y>fYmax) continue;
1117 cluster=c; ci=i;
1118 fI=i+1;
1119 break;
1120 }
1121 return cluster;
1122}
1123*/
1124
1125const AliITSclusterV2 *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci){
1126 //--------------------------------------------------------------------
1127 // This function returns clusters within the "window"
1128 //--------------------------------------------------------------------
1129
1130 if (fCurrentSlice<0){
1131 Double_t rpi2 = 2.*fR*TMath::Pi();
1132 for (Int_t i=fI; i<fImax; i++) {
1133 Double_t y = fY[i];
1134 if (fYmax<y) y -= rpi2;
1135 if (y<fYmin) continue;
1136 if (y>fYmax) continue;
1137 if (fClusters[i]->GetQ()==0&&fSkip==2) continue;
1138 ci=i;
1139 fI=i+1;
1140 return fClusters[i];
1141 }
1142 }
1143 else{
1144 for (Int_t i=fI; i<fImax; i++) {
1145 if (fYcs[i]<fYmin) continue;
1146 if (fYcs[i]>fYmax) continue;
1147 if (fClustersCs[i]->GetQ()==0&&fSkip==2) continue;
1148 ci=fClusterIndexCs[i];
1149 fI=i+1;
1150 return fClustersCs[i];
1151 }
1152 }
1153 return 0;
1154}
1155
1156
1157
1158Int_t AliITStrackerMI::AliITSlayer::
1159FindDetectorIndex(Double_t phi, Double_t z) const {
1160 //--------------------------------------------------------------------
1161 //This function finds the detector crossed by the track
1162 //--------------------------------------------------------------------
1163 Double_t dphi=-(phi-fPhiOffset);
1164 if (dphi < 0) dphi += 2*TMath::Pi();
1165 else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi();
1166 Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5);
1167 if (np>=fNladders) np-=fNladders;
1168 if (np<0) np+=fNladders;
1169
1170 Double_t dz=fZOffset-z;
1171 Int_t nz=Int_t(dz*(fNdetectors-1)*0.5/fZOffset+0.5);
1172 if (nz>=fNdetectors) return -1;
1173 if (nz<0) return -1;
1174
1175 return np*fNdetectors + nz;
1176}
1177
1178Double_t AliITStrackerMI::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0)
1179const {
1180 //--------------------------------------------------------------------
1181 //This function returns the layer thickness at this point (units X0)
1182 //--------------------------------------------------------------------
1183 Double_t d=0.0085;
1184 x0=21.82;
1185 if (43<fR&&fR<45) { //SSD2
1186 Double_t dd=0.0034;
1187 d=dd;
1188 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1189 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1190 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1191 for (Int_t i=0; i<12; i++) {
1192 if (TMath::Abs(z-3.9*(i+0.5))<0.15) {
1193 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1194 d+=0.0034;
1195 break;
1196 }
1197 if (TMath::Abs(z+3.9*(i+0.5))<0.15) {
1198 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1199 d+=0.0034;
1200 break;
1201 }
1202 if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1203 if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1204 }
1205 } else
1206 if (37<fR&&fR<41) { //SSD1
1207 Double_t dd=0.0034;
1208 d=dd;
1209 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1210 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1211 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1212 for (Int_t i=0; i<11; i++) {
1213 if (TMath::Abs(z-3.9*i)<0.15) {
1214 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1215 d+=dd;
1216 break;
1217 }
1218 if (TMath::Abs(z+3.9*i)<0.15) {
1219 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1220 d+=dd;
1221 break;
1222 }
1223 if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1224 if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1225 }
1226 } else
1227 if (13<fR&&fR<26) { //SDD
1228 Double_t dd=0.0033;
1229 d=dd;
1230 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1231
1232 if (TMath::Abs(y-1.80)<0.55) {
1233 d+=0.016;
1234 for (Int_t j=0; j<20; j++) {
1235 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1236 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1237 }
1238 }
1239 if (TMath::Abs(y+1.80)<0.55) {
1240 d+=0.016;
1241 for (Int_t j=0; j<20; j++) {
1242 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1243 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1244 }
1245 }
1246
1247 for (Int_t i=0; i<4; i++) {
1248 if (TMath::Abs(z-7.3*i)<0.60) {
1249 d+=dd;
1250 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1251 break;
1252 }
1253 if (TMath::Abs(z+7.3*i)<0.60) {
1254 d+=dd;
1255 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1256 break;
1257 }
1258 }
1259 } else
1260 if (6<fR&&fR<8) { //SPD2
1261 Double_t dd=0.0063; x0=21.5;
1262 d=dd;
1263 if (TMath::Abs(y-3.08)>0.5) d+=dd;
1264 //if (TMath::Abs(y-3.08)>0.45) d+=dd;
1265 if (TMath::Abs(y-3.03)<0.10) {d+=0.014;}
1266 } else
1267 if (3<fR&&fR<5) { //SPD1
1268 Double_t dd=0.0063; x0=21.5;
1269 d=dd;
1270 if (TMath::Abs(y+0.21)>0.6) d+=dd;
1271 //if (TMath::Abs(y+0.21)>0.45) d+=dd;
1272 if (TMath::Abs(y+0.10)<0.10) {d+=0.014;}
1273 }
1274
1275 return d;
1276}
1277
1278Double_t AliITStrackerMI::GetEffectiveThickness(Double_t y,Double_t z) const
1279{
1280 //--------------------------------------------------------------------
1281 //Returns the thickness between the current layer and the vertex (units X0)
1282 //--------------------------------------------------------------------
1283 Double_t d=0.0028*3*3; //beam pipe
1284 Double_t x0=0;
1285
1286 Double_t xn=fgLayers[fI].GetR();
1287 for (Int_t i=0; i<fI; i++) {
1288 Double_t xi=fgLayers[i].GetR();
1289 d+=fgLayers[i].GetThickness(y,z,x0)*xi*xi;
1290 }
1291
1292 if (fI>1) {
1293 Double_t xi=9.;
1294 d+=0.0097*xi*xi;
1295 }
1296
1297 if (fI>3) {
1298 Double_t xi=0.5*(fgLayers[3].GetR()+fgLayers[4].GetR());
1299 d+=0.0034*xi*xi;
1300 }
1301
1302 return d/(xn*xn);
1303}
1304
1305Int_t AliITStrackerMI::AliITSlayer::InRoad() const {
1306 //--------------------------------------------------------------------
1307 // This function returns number of clusters within the "window"
1308 //--------------------------------------------------------------------
1309 Int_t ncl=0;
1310 for (Int_t i=fI; i<fN; i++) {
1311 const AliITSclusterV2 *c=fClusters[i];
1312 if (c->GetZ() > fZmax) break;
1313 if (c->IsUsed()) continue;
1314 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
1315 Double_t y=fR*det.GetPhi() + c->GetY();
1316
1317 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
1318 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
1319
1320 if (y<fYmin) continue;
1321 if (y>fYmax) continue;
1322 ncl++;
1323 }
1324 return ncl;
1325}
1326
1327Bool_t
15dd636f 1328AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *t,const AliITStrackMI *c) {
e43c066c 1329 //--------------------------------------------------------------------
1330 // This function refits the track "t" at the position "x" using
1331 // the clusters from "c"
1332 //--------------------------------------------------------------------
1333 Int_t index[kMaxLayer];
1334 Int_t k;
1335 for (k=0; k<kMaxLayer; k++) index[k]=-1;
1336 Int_t nc=c->GetNumberOfClusters();
1337 for (k=0; k<nc; k++) {
1338 Int_t idx=c->GetClusterIndex(k),nl=(idx&0xf0000000)>>28;
1339 index[nl]=idx;
1340 }
1341
1342 Int_t from, to, step;
1343 if (xx > t->GetX()) {
1344 from=0; to=kMaxLayer;
1345 step=+1;
1346 } else {
1347 from=kMaxLayer-1; to=-1;
1348 step=-1;
1349 }
1350
1351 for (Int_t i=from; i != to; i += step) {
1352 AliITSlayer &layer=fgLayers[i];
1353 Double_t r=layer.GetR();
1354
1355 {
1356 Double_t hI=i-0.5*step;
1357 if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) {
1358 Double_t rs=0.5*(fgLayers[i-step].GetR() + r);
1359 Double_t d=0.0034, x0=38.6;
1360 if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;}
1361 if (!t->PropagateTo(rs,-step*d,x0)) {
1362 return kFALSE;
1363 }
1364 }
1365 }
1366
1367 // remember old position [SR, GSI 18.02.2003]
1368 Double_t oldX=0., oldY=0., oldZ=0.;
1369 if (t->IsStartedTimeIntegral() && step==1) {
1370 t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ);
1371 }
1372 //
1373
1374 Double_t x,y,z;
1375 if (!t->GetGlobalXYZat(r,x,y,z)) {
1376 return kFALSE;
1377 }
1378 Double_t phi=TMath::ATan2(y,x);
1379 Int_t idet=layer.FindDetectorIndex(phi,z);
1380 if (idet<0) {
1381 return kFALSE;
1382 }
1383 const AliITSdetector &det=layer.GetDetector(idet);
1384 phi=det.GetPhi();
1385 if (!t->Propagate(phi,det.GetR())) {
1386 return kFALSE;
1387 }
1388 t->SetDetectorIndex(idet);
1389
1390 const AliITSclusterV2 *cl=0;
1391 Double_t maxchi2=1000.*kMaxChi2;
1392
1393 Int_t idx=index[i];
1394 if (idx>0) {
1395 const AliITSclusterV2 *c=(AliITSclusterV2 *)GetCluster(idx);
1396 if (idet != c->GetDetectorIndex()) {
1397 idet=c->GetDetectorIndex();
1398 const AliITSdetector &det=layer.GetDetector(idet);
1399 if (!t->Propagate(det.GetPhi(),det.GetR())) {
1400 return kFALSE;
1401 }
1402 t->SetDetectorIndex(idet);
1403 }
1404 //Double_t chi2=t->GetPredictedChi2(c);
1405 Int_t layer = (idx & 0xf0000000) >> 28;;
1406 Double_t chi2=GetPredictedChi2MI(t,c,layer);
1407 if (chi2<maxchi2) {
1408 cl=c;
1409 maxchi2=chi2;
1410 } else {
1411 return kFALSE;
1412 }
1413 }
1414 /*
1415 if (cl==0)
1416 if (t->GetNumberOfClusters()>2) {
1417 Double_t dz=4*TMath::Sqrt(t->GetSigmaZ2()+kSigmaZ2[i]);
1418 Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+kSigmaY2[i]);
1419 Double_t zmin=t->GetZ() - dz;
1420 Double_t zmax=t->GetZ() + dz;
1421 Double_t ymin=t->GetY() + phi*r - dy;
1422 Double_t ymax=t->GetY() + phi*r + dy;
1423 layer.SelectClusters(zmin,zmax,ymin,ymax);
1424
1425 const AliITSclusterV2 *c=0; Int_t ci=-1;
1426 while ((c=layer.GetNextCluster(ci))!=0) {
1427 if (idet != c->GetDetectorIndex()) continue;
1428 Double_t chi2=t->GetPredictedChi2(c);
1429 if (chi2<maxchi2) { cl=c; maxchi2=chi2; idx=ci; }
1430 }
1431 }
1432 */
1433 if (cl) {
1434 //if (!t->Update(cl,maxchi2,idx)) {
1435 if (!UpdateMI(t,cl,maxchi2,idx)) {
1436 return kFALSE;
1437 }
1438 t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
1439 }
1440
1441 {
1442 Double_t x0;
1443 Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0);
1444 t->CorrectForMaterial(-step*d,x0);
1445 }
1446
1447 // track time update [SR, GSI 17.02.2003]
1448 if (t->IsStartedTimeIntegral() && step==1) {
1449 Double_t newX, newY, newZ;
1450 t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
1451 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
1452 (oldZ-newZ)*(oldZ-newZ);
1453 t->AddTimeStep(TMath::Sqrt(dL2));
1454 }
1455 //
1456
1457 }
1458
1459 if (!t->PropagateTo(xx,0.,0.)) return kFALSE;
1460 return kTRUE;
1461}
1462
1463
15dd636f 1464Double_t AliITStrackerMI::GetNormalizedChi2(AliITStrackMI * track, Int_t mode)
e43c066c 1465{
1466 //
1467 // calculate normalized chi2
1468 // return NormalizedChi2(track,0);
1469 Float_t chi2 = 0;
1470 Float_t sum=0;
1471 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
1472 // track->fdEdxMismatch=0;
1473 Float_t dedxmismatch =0;
1474 Float_t *ny = GetNy(fCurrentEsdTrack), *nz = GetNz(fCurrentEsdTrack);
1475 if (mode<100){
1476 for (Int_t i = 0;i<6;i++){
1477 if (track->fClIndex[i]>0){
1478 Float_t cerry, cerrz;
1479 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1480 else
1481 { cerry= track->fSigmaY[i]; cerrz = track->fSigmaZ[i];}
1482 cerry*=cerry;
1483 cerrz*=cerrz;
1484 Float_t cchi2 = (track->fDy[i]*track->fDy[i]/cerry)+(track->fDz[i]*track->fDz[i]/cerrz);
1485 if (i>1){
1486 Float_t ratio = track->fNormQ[i]/track->fExpQ;
1487 if (ratio<0.5) {
1488 cchi2+=(0.5-ratio)*10.;
1489 //track->fdEdxMismatch+=(0.5-ratio)*10.;
1490 dedxmismatch+=(0.5-ratio)*10.;
1491 }
1492 }
1493 if (i<2 ||i>3){
1494 AliITSclusterV2 * cl = (AliITSclusterV2*)GetCluster( track->fClIndex[i]);
1495 Double_t delta = cl->GetNy()+cl->GetNz()-ny[i]-nz[i];
1496 if (delta>1) chi2 +=0.5*TMath::Min(delta/2,2.);
1497 if (i<2) chi2+=2*cl->GetDeltaProbability();
1498 }
1499 chi2+=cchi2;
1500 sum++;
1501 }
1502 }
1503 if (TMath::Abs(track->fdEdxMismatch-dedxmismatch)>0.0001){
1504 track->fdEdxMismatch = dedxmismatch;
1505 }
1506 }
1507 else{
1508 for (Int_t i = 0;i<4;i++){
1509 if (track->fClIndex[i]>0){
1510 Float_t cerry, cerrz;
1511 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1512 else { cerry= track->fSigmaY[i]; cerrz = track->fSigmaZ[i];}
1513 cerry*=cerry;
1514 cerrz*=cerrz;
1515 chi2+= (track->fDy[i]*track->fDy[i]/cerry);
1516 chi2+= (track->fDz[i]*track->fDz[i]/cerrz);
1517 sum++;
1518 }
1519 }
1520 for (Int_t i = 4;i<6;i++){
1521 if (track->fClIndex[i]>0){
1522 Float_t cerry, cerrz;
1523 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1524 else { cerry= track->fSigmaY[i]; cerrz = track->fSigmaZ[i];}
1525 cerry*=cerry;
1526 cerrz*=cerrz;
1527 Float_t cerryb, cerrzb;
1528 if (ny[i+6]>0) {cerryb = erry[i+6]; cerrzb=errz[i+6];}
1529 else { cerryb= track->fSigmaY[i+6]; cerrzb = track->fSigmaZ[i+6];}
1530 cerryb*=cerryb;
1531 cerrzb*=cerrzb;
1532 chi2+= TMath::Min((track->fDy[i+6]*track->fDy[i+6]/cerryb),track->fDy[i]*track->fDy[i]/cerry);
1533 chi2+= TMath::Min((track->fDz[i+6]*track->fDz[i+6]/cerrzb),track->fDz[i]*track->fDz[i]/cerrz);
1534 sum++;
1535 }
1536 }
1537 }
1538 if (track->fESDtrack->GetTPCsignal()>85){
1539 Float_t ratio = track->fdEdx/track->fESDtrack->GetTPCsignal();
1540 if (ratio<0.5) {
1541 chi2+=(0.5-ratio)*5.;
1542 }
1543 if (ratio>2){
1544 chi2+=(ratio-2.0)*3;
1545 }
1546 }
1547 //
1548 Double_t match = TMath::Sqrt(track->fChi22);
1549 if (track->fConstrain) match/=track->GetNumberOfClusters();
1550 if (!track->fConstrain) match/=track->GetNumberOfClusters()-2.;
1551 if (match<0) match=0;
1552 Float_t deadzonefactor = (track->fNDeadZone>0) ? 3*(1.1-track->fDeadZoneProbability):0.;
1553 Double_t normchi2 = 2*track->fNSkipped+match+deadzonefactor+(1+(2*track->fNSkipped+deadzonefactor)/track->GetNumberOfClusters())*
1554 (chi2)/TMath::Max(double(sum-track->fNSkipped),
1555 1./(1.+track->fNSkipped));
1556
1557 return normchi2;
1558}
1559
1560
15dd636f 1561Double_t AliITStrackerMI::GetMatchingChi2(AliITStrackMI * track1, AliITStrackMI * track2)
e43c066c 1562{
1563 //
1564 // return matching chi2 between two tracks
15dd636f 1565 AliITStrackMI track3(*track2);
e43c066c 1566 track3.Propagate(track1->GetAlpha(),track1->GetX());
1567 TMatrixD vec(5,1);
1568 vec(0,0)=track1->fP0-track3.fP0;
1569 vec(1,0)=track1->fP1-track3.fP1;
1570 vec(2,0)=track1->fP2-track3.fP2;
1571 vec(3,0)=track1->fP3-track3.fP3;
1572 vec(4,0)=track1->fP4-track3.fP4;
1573 //
1574 TMatrixD cov(5,5);
1575 cov(0,0) = track1->fC00+track3.fC00;
1576 cov(1,1) = track1->fC11+track3.fC11;
1577 cov(2,2) = track1->fC22+track3.fC22;
1578 cov(3,3) = track1->fC33+track3.fC33;
1579 cov(4,4) = track1->fC44+track3.fC44;
1580
1581 cov(0,1)=cov(1,0) = track1->fC10+track3.fC10;
1582 cov(0,2)=cov(2,0) = track1->fC20+track3.fC20;
1583 cov(0,3)=cov(3,0) = track1->fC30+track3.fC30;
1584 cov(0,4)=cov(4,0) = track1->fC40+track3.fC40;
1585 //
1586 cov(1,2)=cov(2,1) = track1->fC21+track3.fC21;
1587 cov(1,3)=cov(3,1) = track1->fC31+track3.fC31;
1588 cov(1,4)=cov(4,1) = track1->fC41+track3.fC41;
1589 //
1590 cov(2,3)=cov(3,2) = track1->fC32+track3.fC32;
1591 cov(2,4)=cov(4,2) = track1->fC42+track3.fC42;
1592 //
1593 cov(3,4)=cov(4,3) = track1->fC43+track3.fC43;
1594
1595 cov.Invert();
1596 TMatrixD vec2(cov,TMatrixD::kMult,vec);
1597 TMatrixD chi2(vec2,TMatrixD::kTransposeMult,vec);
1598 return chi2(0,0);
1599}
1600
1601Double_t AliITStrackerMI::GetDeadZoneProbability(Double_t zpos, Double_t zerr)
1602{
1603 //
1604 // return probability that given point - characterized by z position and error is in dead zone
1605 //
1606 Double_t probability =0;
1607 Double_t absz = TMath::Abs(zpos);
1608 Double_t nearestz = (absz<2)? 0.:7.1;
1609 if (TMath::Abs(absz-nearestz)>0.25+3*zerr) return 0;
1610 Double_t zmin=0, zmax=0;
1611 if (zpos<-6.){
1612 zmin = -7.25; zmax = -6.95;
1613 }
1614 if (zpos>6){
1615 zmin = 7.0; zmax =7.3;
1616 }
1617 if (absz<2){
1618 zmin = -0.75; zmax = 1.5;
1619 }
1620 probability = (TMath::Erf((zpos-zmin)/zerr) - TMath::Erf((zpos-zmax)/zerr))*0.5;
1621 return probability;
1622}
1623
1624
15dd636f 1625Double_t AliITStrackerMI::GetTruncatedChi2(AliITStrackMI * track, Float_t fac)
e43c066c 1626{
1627 //
1628 // calculate normalized chi2
1629 Float_t chi2[6];
1630 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
1631 Float_t ncl = 0;
1632 for (Int_t i = 0;i<6;i++){
1633 if (TMath::Abs(track->fDy[i])>0){
1634 chi2[i]= (track->fDy[i]/erry[i])*(track->fDy[i]/erry[i]);
1635 chi2[i]+= (track->fDz[i]/errz[i])*(track->fDz[i]/errz[i]);
1636 ncl++;
1637 }
1638 else{chi2[i]=10000;}
1639 }
1640 Int_t index[6];
1641 TMath::Sort(6,chi2,index,kFALSE);
1642 Float_t max = float(ncl)*fac-1.;
1643 Float_t sumchi=0, sumweight=0;
1644 for (Int_t i=0;i<max+1;i++){
1645 Float_t weight = (i<max)?1.:(max+1.-i);
1646 sumchi+=weight*chi2[index[i]];
1647 sumweight+=weight;
1648 }
1649 Double_t normchi2 = sumchi/sumweight;
1650 return normchi2;
1651}
1652
1653
15dd636f 1654Double_t AliITStrackerMI::GetInterpolatedChi2(AliITStrackMI * forwardtrack, AliITStrackMI * backtrack)
e43c066c 1655{
1656 //
1657 // calculate normalized chi2
1658 // if (forwardtrack->fNUsed>0.3*float(forwardtrack->GetNumberOfClusters())) return 10000;
1659 Int_t npoints = 0;
1660 Double_t res =0;
1661 for (Int_t i=0;i<6;i++){
1662 if ( (backtrack->fSigmaY[i]<0.000000001) || (forwardtrack->fSigmaY[i]<0.000000001)) continue;
1663 Double_t sy1 = forwardtrack->fSigmaY[i];
1664 Double_t sz1 = forwardtrack->fSigmaZ[i];
1665 Double_t sy2 = backtrack->fSigmaY[i];
1666 Double_t sz2 = backtrack->fSigmaZ[i];
1667 if (i<2){ sy2=1000.;sz2=1000;}
1668 //
1669 Double_t dy0 = (forwardtrack->fDy[i]/(sy1*sy1) +backtrack->fDy[i]/(sy2*sy2))/(1./(sy1*sy1)+1./(sy2*sy2));
1670 Double_t dz0 = (forwardtrack->fDz[i]/(sz1*sz1) +backtrack->fDz[i]/(sz2*sz2))/(1./(sz1*sz1)+1./(sz2*sz2));
1671 //
1672 Double_t nz0 = dz0*TMath::Sqrt((1./(sz1*sz1)+1./(sz2*sz2)));
1673 Double_t ny0 = dy0*TMath::Sqrt((1./(sy1*sy1)+1./(sy2*sy2)));
1674 //
1675 res+= nz0*nz0+ny0*ny0;
1676 npoints++;
1677 }
1678 if (npoints>1) return
1679 TMath::Max(TMath::Abs(0.3*forwardtrack->Get1Pt())-0.5,0.)+
1680 //2*forwardtrack->fNUsed+
1681 res/TMath::Max(double(npoints-forwardtrack->fNSkipped),
1682 1./(1.+forwardtrack->fNSkipped));
1683 return 1000;
1684}
1685
1686
1687
1688
1689
1690Float_t *AliITStrackerMI::GetWeight(Int_t index) {
1691 //--------------------------------------------------------------------
1692 // Return pointer to a given cluster
1693 //--------------------------------------------------------------------
1694 Int_t l=(index & 0xf0000000) >> 28;
1695 Int_t c=(index & 0x0fffffff) >> 00;
1696 return fgLayers[l].GetWeight(c);
1697}
1698
15dd636f 1699void AliITStrackerMI::RegisterClusterTracks(AliITStrackMI* track,Int_t id)
e43c066c 1700{
1701 //---------------------------------------------
1702 // register track to the list
1703 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
1704 Int_t index = track->GetClusterIndex(icluster);
1705 Int_t l=(index & 0xf0000000) >> 28;
1706 Int_t c=(index & 0x0fffffff) >> 00;
1707 if (c>fgLayers[l].fN) continue;
1708 for (Int_t itrack=0;itrack<4;itrack++){
1709 if (fgLayers[l].fClusterTracks[itrack][c]<0){
1710 fgLayers[l].fClusterTracks[itrack][c]=id;
1711 break;
1712 }
1713 }
1714 }
1715}
15dd636f 1716void AliITStrackerMI::UnRegisterClusterTracks(AliITStrackMI* track, Int_t id)
e43c066c 1717{
1718 //---------------------------------------------
1719 // unregister track from the list
1720 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
1721 Int_t index = track->GetClusterIndex(icluster);
1722 Int_t l=(index & 0xf0000000) >> 28;
1723 Int_t c=(index & 0x0fffffff) >> 00;
1724 if (c>fgLayers[l].fN) continue;
1725 for (Int_t itrack=0;itrack<4;itrack++){
1726 if (fgLayers[l].fClusterTracks[itrack][c]==id){
1727 fgLayers[l].fClusterTracks[itrack][c]=-1;
1728 }
1729 }
1730 }
1731}
15dd636f 1732Float_t AliITStrackerMI::GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSclusterV2 *clist[6])
e43c066c 1733{
1734 //-------------------------------------------------------------
1735 //get number of shared clusters
1736 //-------------------------------------------------------------
1737 Float_t shared=0;
1738 for (Int_t i=0;i<6;i++) { list[i]=-1, clist[i]=0;}
1739 // mean number of clusters
1740 Float_t *ny = GetNy(id), *nz = GetNz(id);
1741
1742
1743 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
1744 Int_t index = track->GetClusterIndex(icluster);
1745 Int_t l=(index & 0xf0000000) >> 28;
1746 Int_t c=(index & 0x0fffffff) >> 00;
1747 if (c>fgLayers[l].fN) continue;
1748 if (ny[l]==0){
1749 printf("problem\n");
1750 }
1751 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(index);
1752 Float_t weight=1;
1753 //
1754 Float_t deltan = 0;
1755 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
1756 if (l>2&&track->fNormQ[l]/track->fExpQ>3.5) continue;
1757 if (l<2 || l>3){
1758 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
1759 }
1760 else{
1761 deltan = (cl->GetNz()-nz[l]);
1762 }
1763 if (deltan>2.0) continue; // extended - highly probable shared cluster
1764 weight = 2./TMath::Max(3.+deltan,2.);
1765 //
1766 for (Int_t itrack=0;itrack<4;itrack++){
1767 if (fgLayers[l].fClusterTracks[itrack][c]>=0 && fgLayers[l].fClusterTracks[itrack][c]!=id){
1768 list[l]=index;
1769 clist[l] = (AliITSclusterV2*)GetCluster(index);
1770 shared+=weight;
1771 break;
1772 }
1773 }
1774 }
1775 track->fNUsed=shared;
1776 return shared;
1777}
1778
15dd636f 1779Int_t AliITStrackerMI::GetOverlapTrack(AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6],Int_t overlist[6])
e43c066c 1780{
1781 //
1782 // find first shared track
1783 //
1784 // mean number of clusters
1785 Float_t *ny = GetNy(trackID), *nz = GetNz(trackID);
1786 //
1787 for (Int_t i=0;i<6;i++) overlist[i]=-1;
1788 Int_t sharedtrack=100000;
1789 Int_t tracks[24],trackindex=0;
1790 for (Int_t i=0;i<24;i++) {tracks[i]=-1;}
1791 //
1792 for (Int_t icluster=0;icluster<6;icluster++){
1793 if (clusterlist[icluster]<0) continue;
1794 Int_t index = clusterlist[icluster];
1795 Int_t l=(index & 0xf0000000) >> 28;
1796 Int_t c=(index & 0x0fffffff) >> 00;
1797 if (ny[l]==0){
1798 printf("problem\n");
1799 }
1800 if (c>fgLayers[l].fN) continue;
1801 //if (l>3) continue;
1802 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(index);
1803 //
1804 Float_t deltan = 0;
1805 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
1806 if (l>2&&track->fNormQ[l]/track->fExpQ>3.5) continue;
1807 if (l<2 || l>3){
1808 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
1809 }
1810 else{
1811 deltan = (cl->GetNz()-nz[l]);
1812 }
1813 if (deltan>2.0) continue; // extended - highly probable shared cluster
1814 //
1815 for (Int_t itrack=3;itrack>=0;itrack--){
1816 if (fgLayers[l].fClusterTracks[itrack][c]<0) continue;
1817 if (fgLayers[l].fClusterTracks[itrack][c]!=trackID){
1818 tracks[trackindex] = fgLayers[l].fClusterTracks[itrack][c];
1819 trackindex++;
1820 }
1821 }
1822 }
1823 if (trackindex==0) return -1;
1824 if (trackindex==1){
1825 sharedtrack = tracks[0];
1826 }else{
1827 if (trackindex==2) sharedtrack =TMath::Min(tracks[0],tracks[1]);
1828 else{
1829 //
1830 Int_t track[24], cluster[24];
1831 for (Int_t i=0;i<trackindex;i++){ track[i]=-1; cluster[i]=0;}
1832 Int_t index =0;
1833 //
1834 for (Int_t i=0;i<trackindex;i++){
1835 if (tracks[i]<0) continue;
1836 track[index] = tracks[i];
1837 cluster[index]++;
1838 for (Int_t j=i+1;j<trackindex;j++){
1839 if (tracks[j]<0) continue;
1840 if (tracks[j]==tracks[i]){
1841 cluster[index]++;
1842 tracks[j]=-1;
1843 }
1844 }
1845 index++;
1846 }
1847 Int_t max=0;
1848 for (Int_t i=0;i<index;i++){
1849 if (cluster[index]>max) {
1850 sharedtrack=track[index];
1851 max=cluster[index];
1852 }
1853 }
1854 }
1855 }
1856
1857 if (sharedtrack>=100000) return -1;
1858 //
1859 // make list of overlaps
1860 shared =0;
1861 for (Int_t icluster=0;icluster<6;icluster++){
1862 if (clusterlist[icluster]<0) continue;
1863 Int_t index = clusterlist[icluster];
1864 Int_t l=(index & 0xf0000000) >> 28;
1865 Int_t c=(index & 0x0fffffff) >> 00;
1866 if (c>fgLayers[l].fN) continue;
1867 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(index);
1868 if (l==0 || l==1){
1869 if (cl->GetNy()>2) continue;
1870 if (cl->GetNz()>2) continue;
1871 }
1872 if (l==4 || l==5){
1873 if (cl->GetNy()>3) continue;
1874 if (cl->GetNz()>3) continue;
1875 }
1876 //
1877 for (Int_t itrack=3;itrack>=0;itrack--){
1878 if (fgLayers[l].fClusterTracks[itrack][c]<0) continue;
1879 if (fgLayers[l].fClusterTracks[itrack][c]==sharedtrack){
1880 overlist[l]=index;
1881 shared++;
1882 }
1883 }
1884 }
1885 return sharedtrack;
1886}
1887
1888
15dd636f 1889AliITStrackMI * AliITStrackerMI::GetBest2Tracks(Int_t trackID1, Int_t trackID2, Float_t th0, Float_t th1){
e43c066c 1890 //
1891 // try to find track hypothesys without conflicts
1892 // with minimal chi2;
1893 TClonesArray *arr1 = (TClonesArray*)fTrackHypothesys.At(trackID1);
1894 Int_t entries1 = arr1->GetEntriesFast();
1895 TClonesArray *arr2 = (TClonesArray*)fTrackHypothesys.At(trackID2);
15dd636f 1896 if (!arr2) return (AliITStrackMI*) arr1->UncheckedAt(0);
e43c066c 1897 Int_t entries2 = arr2->GetEntriesFast();
15dd636f 1898 if (entries2<=0) return (AliITStrackMI*) arr1->UncheckedAt(0);
e43c066c 1899 //
15dd636f 1900 AliITStrackMI * track10=(AliITStrackMI*) arr1->UncheckedAt(0);
1901 AliITStrackMI * track20=(AliITStrackMI*) arr2->UncheckedAt(0);
e43c066c 1902 if (TMath::Abs(1./track10->Get1Pt())>0.5+TMath::Abs(1/track20->Get1Pt())) return track10;
1903
1904 for (Int_t itrack=0;itrack<entries1;itrack++){
15dd636f 1905 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
e43c066c 1906 UnRegisterClusterTracks(track,trackID1);
1907 }
1908 //
1909 for (Int_t itrack=0;itrack<entries2;itrack++){
15dd636f 1910 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
e43c066c 1911 UnRegisterClusterTracks(track,trackID2);
1912 }
1913 Int_t index1=0;
1914 Int_t index2=0;
1915 Float_t maxconflicts=6;
1916 Double_t maxchi2 =1000.;
1917 //
1918 // get weight of hypothesys - using best hypothesy
1919 Double_t w1,w2;
1920
1921 Int_t list1[6],list2[6];
1922 AliITSclusterV2 *clist1[6], *clist2[6] ;
1923 RegisterClusterTracks(track10,trackID1);
1924 RegisterClusterTracks(track20,trackID2);
1925 Float_t conflict1 = GetNumberOfSharedClusters(track10,trackID1,list1,clist1);
1926 Float_t conflict2 = GetNumberOfSharedClusters(track20,trackID2,list2,clist2);
1927 UnRegisterClusterTracks(track10,trackID1);
1928 UnRegisterClusterTracks(track20,trackID2);
1929 //
1930 // normalized chi2
1931 Float_t chi21 =0,chi22=0,ncl1=0,ncl2=0;
1932 Float_t nerry[6],nerrz[6];
1933 Float_t *erry1=GetErrY(trackID1),*errz1 = GetErrZ(trackID1);
1934 Float_t *erry2=GetErrY(trackID2),*errz2 = GetErrZ(trackID2);
1935 for (Int_t i=0;i<6;i++){
1936 if ( (erry1[i]>0) && (erry2[i]>0)) {
1937 nerry[i] = TMath::Min(erry1[i],erry2[i]);
1938 nerrz[i] = TMath::Min(errz1[i],errz2[i]);
1939 }else{
1940 nerry[i] = TMath::Max(erry1[i],erry2[i]);
1941 nerrz[i] = TMath::Max(errz1[i],errz2[i]);
1942 }
1943 if (TMath::Abs(track10->fDy[i])>0.000000000000001){
1944 chi21 += track10->fDy[i]*track10->fDy[i]/(nerry[i]*nerry[i]);
1945 chi21 += track10->fDz[i]*track10->fDz[i]/(nerrz[i]*nerrz[i]);
1946 ncl1++;
1947 }
1948 if (TMath::Abs(track20->fDy[i])>0.000000000000001){
1949 chi22 += track20->fDy[i]*track20->fDy[i]/(nerry[i]*nerry[i]);
1950 chi22 += track20->fDz[i]*track20->fDz[i]/(nerrz[i]*nerrz[i]);
1951 ncl2++;
1952 }
1953 }
1954 chi21/=ncl1;
1955 chi22/=ncl2;
1956 //
1957 //
1958 Float_t d1 = TMath::Sqrt(track10->fD[0]*track10->fD[0]+track10->fD[1]*track10->fD[1])+0.1;
1959 Float_t d2 = TMath::Sqrt(track20->fD[0]*track20->fD[0]+track20->fD[1]*track20->fD[1])+0.1;
1960 Float_t s1 = TMath::Sqrt(track10->GetSigmaY2()*track10->GetSigmaZ2());
1961 Float_t s2 = TMath::Sqrt(track20->GetSigmaY2()*track20->GetSigmaZ2());
1962 //
1963 w1 = (d2/(d1+d2)+ 2*s2/(s1+s2)+
1964 +s2/(s1+s2)*0.5*(chi22+2.)/(chi21+chi22+4.)
1965 +1.*TMath::Abs(1./track10->Get1Pt())/(TMath::Abs(1./track10->Get1Pt())+TMath::Abs(1./track20->Get1Pt()))
1966 );
1967 w2 = (d1/(d1+d2)+ 2*s1/(s1+s2)+
1968 s1/(s1+s2)*0.5*(chi21+2.)/(chi21+chi22+4.)
1969 +1.*TMath::Abs(1./track20->Get1Pt())/(TMath::Abs(1./track10->Get1Pt())+TMath::Abs(1./track20->Get1Pt()))
1970 );
1971
1972 Double_t sumw = w1+w2;
1973 w1/=sumw;
1974 w2/=sumw;
1975 if (w1<w2*0.5) {
1976 w1 = (d2+0.5)/(d1+d2+1.);
1977 w2 = (d1+0.5)/(d1+d2+1.);
1978 }
1979 // Float_t maxmax = w1*track10->fChi2MIP[0]+w2*track20->fChi2MIP[0]+w1*conflict1+w2*conflict2+1.;
1980 //Float_t maxconflicts0 = w1*conflict1+w2*conflict2;
1981 //
1982 // get pair of "best" hypothesys
1983 //
1984 Float_t * ny1 = GetNy(trackID1), * nz1 = GetNz(trackID1);
1985 Float_t * ny2 = GetNy(trackID2), * nz2 = GetNz(trackID2);
1986
1987 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
15dd636f 1988 AliITStrackMI * track1=(AliITStrackMI*) arr1->UncheckedAt(itrack1);
e43c066c 1989 //if (track1->fFakeRatio>0) continue;
1990 RegisterClusterTracks(track1,trackID1);
1991 for (Int_t itrack2=0;itrack2<entries2;itrack2++){
15dd636f 1992 AliITStrackMI * track2=(AliITStrackMI*) arr2->UncheckedAt(itrack2);
e43c066c 1993
1994 // Float_t current = w1*track1->fChi2MIP[0]+w2*track2->fChi2MIP[0];
1995 //if (track2->fFakeRatio>0) continue;
1996 Float_t nskipped=0;
1997 RegisterClusterTracks(track2,trackID2);
1998 Int_t list1[6],list2[6];
1999 AliITSclusterV2 *clist1[6], *clist2[6] ;
2000 Float_t cconflict1 = GetNumberOfSharedClusters(track1,trackID1,list1,clist1);
2001 Float_t cconflict2 = GetNumberOfSharedClusters(track2,trackID2,list2,clist2);
2002 UnRegisterClusterTracks(track2,trackID2);
2003 //
2004 if (track1->fConstrain) nskipped+=w1*track1->fNSkipped;
2005 if (track2->fConstrain) nskipped+=w2*track2->fNSkipped;
2006 if (nskipped>0.5) continue;
2007 //
2008 //if ( w1*conflict1+w2*conflict2>maxconflicts0) continue;
2009 if (conflict1+1<cconflict1) continue;
2010 if (conflict2+1<cconflict2) continue;
2011 Float_t conflict=0;
2012 Float_t sumchi2=0;
2013 Float_t sum=0;
2014 for (Int_t i=0;i<6;i++){
2015 //
2016 Float_t c1 =0.; // conflict coeficients
2017 Float_t c2 =0.;
2018 if (clist1[i]&&clist2[i]){
2019 Float_t deltan = 0;
2020 if (i<2 || i>3){
2021 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-TMath::Max(ny1[i],ny2[i])-TMath::Max(nz1[i],nz2[i]));
2022 }
2023 else{
2024 deltan = (clist1[i]->GetNz()-TMath::Max(nz1[i],nz2[i]));
2025 }
2026 c1 = 2./TMath::Max(3.+deltan,2.);
2027 c2 = 2./TMath::Max(3.+deltan,2.);
2028 }
2029 else{
2030 if (clist1[i]){
2031 Float_t deltan = 0;
2032 if (i<2 || i>3){
2033 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-ny1[i]-nz1[i]);
2034 }
2035 else{
2036 deltan = (clist1[i]->GetNz()-nz1[i]);
2037 }
2038 c1 = 2./TMath::Max(3.+deltan,2.);
2039 c2 = 0;
2040 }
2041
2042 if (clist2[i]){
2043 Float_t deltan = 0;
2044 if (i<2 || i>3){
2045 deltan = (clist2[i]->GetNy()+clist2[i]->GetNz()-ny2[i]-nz2[i]);
2046 }
2047 else{
2048 deltan = (clist2[i]->GetNz()-nz2[i]);
2049 }
2050 c2 = 2./TMath::Max(3.+deltan,2.);
2051 c1 = 0;
2052 }
2053 }
2054 //
2055 Double_t chi21=0,chi22=0;
2056 if (TMath::Abs(track1->fDy[i])>0.) {
2057 chi21 = (track1->fDy[i]/track1->fSigmaY[i])*(track1->fDy[i]/track1->fSigmaY[i])+
2058 (track1->fDz[i]/track1->fSigmaZ[i])*(track1->fDz[i]/track1->fSigmaZ[i]);
2059 //chi21 = (track1->fDy[i]*track1->fDy[i])/(nerry[i]*nerry[i])+
2060 // (track1->fDz[i]*track1->fDz[i])/(nerrz[i]*nerrz[i]);
2061 }else{
2062 if (TMath::Abs(track1->fSigmaY[i]>0.)) c1=1;
2063 }
2064 //
2065 if (TMath::Abs(track2->fDy[i])>0.) {
2066 chi22 = (track2->fDy[i]/track2->fSigmaY[i])*(track2->fDy[i]/track2->fSigmaY[i])+
2067 (track2->fDz[i]/track2->fSigmaZ[i])*(track2->fDz[i]/track2->fSigmaZ[i]);
2068 //chi22 = (track2->fDy[i]*track2->fDy[i])/(nerry[i]*nerry[i])+
2069 // (track2->fDz[i]*track2->fDz[i])/(nerrz[i]*nerrz[i]);
2070 }
2071 else{
2072 if (TMath::Abs(track2->fSigmaY[i]>0.)) c2=1;
2073 }
2074 sumchi2+=w1*(1.+c1)*(1+c1)*(chi21+c1)+w2*(1.+c2)*(1+c2)*(chi22+c2);
2075 if (chi21>0) sum+=w1;
2076 if (chi22>0) sum+=w2;
2077 conflict+=(c1+c2);
2078 }
2079 Double_t norm = sum-w1*track1->fNSkipped-w2*track2->fNSkipped;
2080 if (norm<0) norm =1/(w1*track1->fNSkipped+w2*track2->fNSkipped);
2081 Double_t normchi2 = 2*conflict+sumchi2/sum;
2082 if ( normchi2 <maxchi2 ){
2083 index1 = itrack1;
2084 index2 = itrack2;
2085 maxconflicts = conflict;
2086 maxchi2 = normchi2;
2087 }
2088 }
2089 UnRegisterClusterTracks(track1,trackID1);
2090 }
2091 //
2092 // if (maxconflicts<4 && maxchi2<th0){
2093 if (maxchi2<th0*2.){
2094 Float_t orig = track10->fFakeRatio*track10->GetNumberOfClusters();
15dd636f 2095 AliITStrackMI* track1=(AliITStrackMI*) arr1->UncheckedAt(index1);
e43c066c 2096 track1->fChi2MIP[5] = maxconflicts;
2097 track1->fChi2MIP[6] = maxchi2;
2098 track1->fChi2MIP[7] = 0.01+orig-(track1->fFakeRatio*track1->GetNumberOfClusters());
2099 // track1->UpdateESDtrack(AliESDtrack::kITSin);
2100 track1->fChi2MIP[8] = index1;
2101 fBestTrackIndex[trackID1] =index1;
2102 UpdateESDtrack(track1, AliESDtrack::kITSin);
2103 }
2104 else if (track10->fChi2MIP[0]<th1){
2105 track10->fChi2MIP[5] = maxconflicts;
2106 track10->fChi2MIP[6] = maxchi2;
2107 // track10->UpdateESDtrack(AliESDtrack::kITSin);
2108 UpdateESDtrack(track10,AliESDtrack::kITSin);
2109 }
2110
2111 for (Int_t itrack=0;itrack<entries1;itrack++){
15dd636f 2112 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
e43c066c 2113 UnRegisterClusterTracks(track,trackID1);
2114 }
2115 //
2116 for (Int_t itrack=0;itrack<entries2;itrack++){
15dd636f 2117 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
e43c066c 2118 UnRegisterClusterTracks(track,trackID2);
2119 }
2120
2121 if (track10->fConstrain&&track10->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track10->fChi2MIP[1]<kMaxChi2PerCluster[1]
2122 &&track10->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track10->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2123 // if (track10->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track10->fChi2MIP[1]<kMaxChi2PerCluster[1]
2124 // &&track10->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track10->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2125 RegisterClusterTracks(track10,trackID1);
2126 }
2127 if (track20->fConstrain&&track20->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track20->fChi2MIP[1]<kMaxChi2PerCluster[1]
2128 &&track20->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track20->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2129 //if (track20->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track20->fChi2MIP[1]<kMaxChi2PerCluster[1]
2130 // &&track20->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track20->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2131 RegisterClusterTracks(track20,trackID2);
2132 }
2133 return track10;
2134
2135}
2136
2137void AliITStrackerMI::UseClusters(const AliKalmanTrack *t, Int_t from) const {
2138 //--------------------------------------------------------------------
2139 // This function marks clusters assigned to the track
2140 //--------------------------------------------------------------------
2141 AliTracker::UseClusters(t,from);
2142
2143 AliITSclusterV2 *c=(AliITSclusterV2 *)GetCluster(t->GetClusterIndex(0));
2144 //if (c->GetQ()>2) c->Use();
2145 if (c->GetSigmaZ2()>0.1) c->Use();
2146 c=(AliITSclusterV2 *)GetCluster(t->GetClusterIndex(1));
2147 //if (c->GetQ()>2) c->Use();
2148 if (c->GetSigmaZ2()>0.1) c->Use();
2149
2150}
2151
2152
15dd636f 2153void AliITStrackerMI::AddTrackHypothesys(AliITStrackMI * track, Int_t esdindex)
e43c066c 2154{
2155 //------------------------------------------------------------------
2156 // add track to the list of hypothesys
2157 //------------------------------------------------------------------
2158
2159 if (esdindex>=fTrackHypothesys.GetEntriesFast()) fTrackHypothesys.Expand(esdindex*2+10);
2160 //
2161 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2162 if (!array) {
2163 array = new TObjArray(10);
2164 fTrackHypothesys.AddAt(array,esdindex);
2165 }
2166 array->AddLast(track);
2167}
2168
2169void AliITStrackerMI::SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode)
2170{
2171 //-------------------------------------------------------------------
2172 // compress array of track hypothesys
2173 // keep only maxsize best hypothesys
2174 //-------------------------------------------------------------------
2175 if (esdindex>fTrackHypothesys.GetEntriesFast()) return;
2176 if (! (fTrackHypothesys.At(esdindex)) ) return;
2177 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2178 Int_t entries = array->GetEntriesFast();
2179 //
2180 //- find preliminary besttrack as a reference
2181 Float_t minchi2=10000;
2182 Int_t maxn=0;
15dd636f 2183 AliITStrackMI * besttrack=0;
e43c066c 2184 for (Int_t itrack=0;itrack<array->GetEntriesFast();itrack++){
15dd636f 2185 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2186 if (!track) continue;
2187 Float_t chi2 = NormalizedChi2(track,0);
2188 //
2189 Int_t tpcLabel=track->fESDtrack->GetTPCLabel();
2190 track->SetLabel(tpcLabel);
2191 CookdEdx(track);
2192 track->fFakeRatio=1.;
2193 CookLabel(track,0.); //For comparison only
2194 //
2195 //if (chi2<kMaxChi2PerCluster[0]&&track->fFakeRatio==0){
2196 if (chi2<kMaxChi2PerCluster[0]){
2197 if (track->GetNumberOfClusters()<maxn) continue;
2198 maxn = track->GetNumberOfClusters();
2199 if (chi2<minchi2){
2200 minchi2=chi2;
2201 besttrack=track;
2202 }
2203 }
2204 else{
2205 delete array->RemoveAt(itrack);
2206 }
2207 }
2208 if (!besttrack) return;
2209 //
2210 //
2211 //take errors of best track as a reference
2212 Float_t *erry = GetErrY(esdindex), *errz = GetErrZ(esdindex);
2213 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
2214 for (Int_t i=0;i<6;i++) {
2215 if (besttrack->fClIndex[i]>0){
2216 erry[i] = besttrack->fSigmaY[i]; erry[i+6] = besttrack->fSigmaY[i+6];
2217 errz[i] = besttrack->fSigmaZ[i]; errz[i+6] = besttrack->fSigmaZ[i+6];
2218 ny[i] = besttrack->fNy[i];
2219 nz[i] = besttrack->fNz[i];
2220 }
2221 }
2222 //
2223 // calculate normalized chi2
2224 //
2225 Float_t * chi2 = new Float_t[entries];
2226 Int_t * index = new Int_t[entries];
2227 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2228 for (Int_t itrack=0;itrack<entries;itrack++){
15dd636f 2229 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2230 if (track){
2231 track->fChi2MIP[0] = GetNormalizedChi2(track, mode);
2232 if (track->fChi2MIP[0]<kMaxChi2PerCluster[0])
2233 chi2[itrack] = track->fChi2MIP[0];
2234 else
2235 delete array->RemoveAt(itrack);
2236 }
2237 }
2238 //
2239 TMath::Sort(entries,chi2,index,kFALSE);
15dd636f 2240 besttrack = (AliITStrackMI*)array->At(index[0]);
e43c066c 2241 if (besttrack&&besttrack->fChi2MIP[0]<kMaxChi2PerCluster[0]){
2242 for (Int_t i=0;i<6;i++){
2243 if (besttrack->fClIndex[i]>0){
2244 erry[i] = besttrack->fSigmaY[i]; erry[i+6] = besttrack->fSigmaY[i+6];
2245 errz[i] = besttrack->fSigmaZ[i]; erry[i+6] = besttrack->fSigmaY[i+6];
2246 ny[i] = besttrack->fNy[i];
2247 nz[i] = besttrack->fNz[i];
2248 }
2249 }
2250 }
2251 //
2252 // calculate one more time with updated normalized errors
2253 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2254 for (Int_t itrack=0;itrack<entries;itrack++){
15dd636f 2255 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2256 if (track){
2257 track->fChi2MIP[0] = GetNormalizedChi2(track,mode);
2258 if (track->fChi2MIP[0]<kMaxChi2PerCluster[0])
2259 chi2[itrack] = track->fChi2MIP[0]-0*(track->GetNumberOfClusters()+track->fNDeadZone);
2260 else
2261 delete array->RemoveAt(itrack);
2262 }
2263 }
2264 entries = array->GetEntriesFast();
2265 //
2266 if (entries>0){
2267 TObjArray * newarray = new TObjArray();
2268 TMath::Sort(entries,chi2,index,kFALSE);
15dd636f 2269 besttrack = (AliITStrackMI*)array->At(index[0]);
e43c066c 2270 if (besttrack){
2271 //
2272 for (Int_t i=0;i<6;i++){
2273 if (besttrack->fNz[i]>0&&besttrack->fNy[i]>0){
2274 erry[i] = besttrack->fSigmaY[i]; erry[i+6] = besttrack->fSigmaY[i+6];
2275 errz[i] = besttrack->fSigmaZ[i]; errz[i+6] = besttrack->fSigmaZ[i+6];
2276 ny[i] = besttrack->fNy[i];
2277 nz[i] = besttrack->fNz[i];
2278 }
2279 }
2280 besttrack->fChi2MIP[0] = GetNormalizedChi2(besttrack,mode);
2281 Float_t minchi2 = TMath::Min(besttrack->fChi2MIP[0]+5.+besttrack->fNUsed, double(kMaxChi2PerCluster[0]));
2282 Float_t minn = besttrack->GetNumberOfClusters()-3;
2283 Int_t accepted=0;
2284 for (Int_t i=0;i<entries;i++){
15dd636f 2285 AliITStrackMI * track = (AliITStrackMI*)array->At(index[i]);
e43c066c 2286 if (!track) continue;
2287 if (accepted>maxcut) break;
2288 track->fChi2MIP[0] = GetNormalizedChi2(track,mode);
2289 if (track->GetNumberOfClusters()<6 && (track->fChi2MIP[0]+track->fNUsed>minchi2)){
2290 delete array->RemoveAt(index[i]);
2291 continue;
2292 }
2293 if (track->fChi2MIP[0]+track->fNUsed<minchi2 && track->GetNumberOfClusters()>=minn){
2294 accepted++;
2295 //
2296 newarray->AddLast(array->RemoveAt(index[i]));
2297 for (Int_t i=0;i<6;i++){
2298 if (nz[i]==0){
2299 erry[i] = track->fSigmaY[i]; erry[i+6] = track->fSigmaY[i+6];
2300 errz[i] = track->fSigmaZ[i]; errz[i] = track->fSigmaZ[i+6];
2301 ny[i] = track->fNy[i];
2302 nz[i] = track->fNz[i];
2303 }
2304 }
2305 }
2306 else{
2307 delete array->RemoveAt(index[i]);
2308 }
2309 }
2310 array->Delete();
2311 delete fTrackHypothesys.RemoveAt(esdindex);
2312 fTrackHypothesys.AddAt(newarray,esdindex);
2313 }
2314 else{
2315 array->Delete();
2316 delete fTrackHypothesys.RemoveAt(esdindex);
2317 }
2318 }
2319 delete [] chi2;
2320 delete [] index;
2321}
2322
2323
2324
15dd636f 2325AliITStrackMI * AliITStrackerMI::GetBestHypothesys(Int_t esdindex, AliITStrackMI * original, Int_t checkmax)
e43c066c 2326{
2327 //-------------------------------------------------------------
2328 // try to find best hypothesy
2329 // currently - minimal chi2 of track+backpropagated track+matching to the tpc track
2330 //-------------------------------------------------------------
2331 if (fTrackHypothesys.GetEntriesFast()<=esdindex) return 0;
2332 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2333 if (!array) return 0;
2334 Int_t entries = array->GetEntriesFast();
2335 if (!entries) return 0;
2336 Float_t minchi2 = 100000;
15dd636f 2337 AliITStrackMI * besttrack=0;
e43c066c 2338 //
15dd636f 2339 AliITStrackMI * backtrack = new AliITStrackMI(*original);
2340 AliITStrackMI * forwardtrack = new AliITStrackMI(*original);
e43c066c 2341 //
2342 for (Int_t i=0;i<entries;i++){
15dd636f 2343 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
e43c066c 2344 if (!track) continue;
2345 track->fChi2MIP[1] = 1000000;
2346 track->fChi2MIP[2] = 1000000;
2347 track->fChi2MIP[3] = 1000000;
2348 //
2349 // backtrack
15dd636f 2350 backtrack = new(backtrack) AliITStrackMI(*track);
e43c066c 2351 backtrack->ResetCovariance();
2352 backtrack->ResetCovariance();
2353 backtrack->ResetClusters();
2354 Double_t x = original->GetX();
2355 if (!RefitAt(x,backtrack,track)) continue;
2356 track->fChi2MIP[1] = NormalizedChi2(backtrack,0);
2357 //for (Int_t i=2;i<6;i++){track->fDy[i]+=backtrack->fDy[i]; track->fDz[i]+=backtrack->fDz[i];}
2358 if (track->fChi2MIP[1]>kMaxChi2PerCluster[1]*6.) continue;
2359 track->fChi22 = GetMatchingChi2(backtrack,original);
2360
2361 if ((track->fConstrain) && track->fChi22>90.) continue;
2362 if ((!track->fConstrain) && track->fChi22>30.) continue;
2363 if ( track->fChi22/track->GetNumberOfClusters()>11.) continue;
2364
2365
2366 if (!(track->fConstrain)&&track->fChi2MIP[1]>kMaxChi2PerCluster[1]) continue;
2367 Bool_t isOK=kTRUE;
2368 /*
2369 for (Int_t i=0;i<6;i++){
2370 if (track->fClIndex[i]>0){
2371 Double_t dy1 = (track->fDy[i]/track->fSigmaY[i]);
2372 Double_t dz1 = (track->fDz[i]/track->fSigmaZ[i]);
2373 Double_t dy2 = (backtrack->fDy[i]/backtrack->fSigmaY[i]);
2374 Double_t dz2 = (backtrack->fDz[i]/backtrack->fSigmaZ[i]);
2375 if (TMath::Min(dy1*dy1+dz1*dz1,dy2*dy2+dz2*dz2)> kMaxChi2sR[i]) isOK =kFALSE;
2376 track->fDy[i+6] = backtrack->fDy[i];
2377 track->fDz[i+6] = backtrack->fDz[i];
2378 track->fSigmaY[i+6] = backtrack->fSigmaY[i];
2379 track->fSigmaZ[i+6] = backtrack->fSigmaZ[i];
2380 }
2381 else{
2382 if (i==5){
2383 if (track->fClIndex[i-1]>0){
2384 Double_t dy2 = (backtrack->fDy[i-1]/backtrack->fSigmaY[i-1]);
2385 Double_t dz2 = (backtrack->fDz[i-1]/backtrack->fSigmaZ[i-1]);
2386 if (dy2*dy2+dz2*dz2> kMaxChi2sR[i]) isOK =kFALSE;
2387 }
2388 else isOK = kFALSE;
2389 }
2390 }
2391 }
2392 */
2393 if(!isOK) continue;
2394 //
2395 //forward track - without constraint
15dd636f 2396 forwardtrack = new(forwardtrack) AliITStrackMI(*original);
e43c066c 2397 forwardtrack->ResetClusters();
2398 x = track->GetX();
2399 if (!RefitAt(x,forwardtrack,track)) continue;
2400 track->fChi2MIP[2] = NormalizedChi2(forwardtrack,0);
2401 if (track->fChi2MIP[2]>kMaxChi2PerCluster[2]*6.0) continue;
2402 if (!(track->fConstrain)&&track->fChi2MIP[2]>kMaxChi2PerCluster[2]) continue;
2403
2404 track->fD[0] = forwardtrack->GetD(GetX(),GetY());
2405 track->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
2406 forwardtrack->fD[0] = track->fD[0];
2407 forwardtrack->fD[1] = track->fD[1];
2408 {
2409 Int_t list[6];
2410 AliITSclusterV2* clist[6];
2411 track->fChi2MIP[4] = GetNumberOfSharedClusters(track,esdindex,list,clist);
2412 if ( (!track->fConstrain) && track->fChi2MIP[4]>1.0) continue;
2413 }
2414
2415 track->fChi2MIP[3] = GetInterpolatedChi2(forwardtrack,backtrack);
2416 if ( (track->fChi2MIP[3]>6.*kMaxChi2PerCluster[3])) continue;
2417 if ( (!track->fConstrain) && (track->fChi2MIP[3]>2*kMaxChi2PerCluster[3])) {
2418 track->fChi2MIP[3]=1000;
2419 continue;
2420 }
2421 Double_t chi2 = track->fChi2MIP[0]+track->fNUsed;
2422 //
2423 for (Int_t ichi=0;ichi<5;ichi++){
2424 forwardtrack->fChi2MIP[ichi] = track->fChi2MIP[ichi];
2425 }
2426 if (chi2 < minchi2){
15dd636f 2427 //besttrack = new AliITStrackMI(*forwardtrack);
99c2ee26 2428 besttrack = track;
e43c066c 2429 besttrack->SetLabel(track->GetLabel());
2430 besttrack->fFakeRatio = track->fFakeRatio;
2431 minchi2 = chi2;
2432 original->fD[0] = forwardtrack->GetD(GetX(),GetY());
2433 original->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
2434 }
2435 }
2436 delete backtrack;
2437 delete forwardtrack;
2438 Int_t accepted=0;
2439 for (Int_t i=0;i<entries;i++){
15dd636f 2440 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
e43c066c 2441 if (!track) continue;
2442 if (accepted>checkmax || track->fChi2MIP[3]>kMaxChi2PerCluster[3]*6. ||
2443 (track->GetNumberOfClusters()<besttrack->GetNumberOfClusters()-1.)||
2444 track->fChi2MIP[0]>besttrack->fChi2MIP[0]+2.*besttrack->fNUsed+3.){
2445 delete array->RemoveAt(i);
2446 continue;
2447 }
2448 else{
2449 accepted++;
2450 }
2451 }
2452 //
2453 array->Compress();
2454 SortTrackHypothesys(esdindex,checkmax,1);
2455 array = (TObjArray*) fTrackHypothesys.At(esdindex);
15dd636f 2456 besttrack = (AliITStrackMI*)array->At(0);
e43c066c 2457 if (!besttrack) return 0;
2458 besttrack->fChi2MIP[8]=0;
2459 fBestTrackIndex[esdindex]=0;
2460 entries = array->GetEntriesFast();
15dd636f 2461 AliITStrackMI *longtrack =0;
e43c066c 2462 minchi2 =1000;
2463 Float_t minn=besttrack->GetNumberOfClusters()+besttrack->fNDeadZone;
2464 for (Int_t itrack=entries-1;itrack>0;itrack--){
15dd636f 2465 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2466 if (!track->fConstrain) continue;
2467 if (track->GetNumberOfClusters()+track->fNDeadZone<minn) continue;
2468 if (track->fChi2MIP[0]-besttrack->fChi2MIP[0]>0.0) continue;
2469 if (track->fChi2MIP[0]>4.) continue;
2470 minn = track->GetNumberOfClusters()+track->fNDeadZone;
2471 longtrack =track;
2472 }
2473 //if (longtrack) besttrack=longtrack;
2474
2475 Int_t list[6];
2476 AliITSclusterV2 * clist[6];
2477 Float_t shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
2478 if (besttrack->fConstrain&&besttrack->fChi2MIP[0]<kMaxChi2PerCluster[0]&&besttrack->fChi2MIP[1]<kMaxChi2PerCluster[1]
2479 &&besttrack->fChi2MIP[2]<kMaxChi2PerCluster[2]&&besttrack->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2480 //if (besttrack->fChi2MIP[0]<kMaxChi2PerCluster[0]&&besttrack->fChi2MIP[1]<kMaxChi2PerCluster[1]
2481 // &&besttrack->fChi2MIP[2]<kMaxChi2PerCluster[2]&&besttrack->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2482 RegisterClusterTracks(besttrack,esdindex);
2483 }
2484 //
2485 //
2486 if (shared>0.0){
2487 Int_t nshared;
2488 Int_t overlist[6];
2489 Int_t sharedtrack = GetOverlapTrack(besttrack, esdindex, nshared, list, overlist);
2490 if (sharedtrack>=0){
2491 //
2492 besttrack = GetBest2Tracks(esdindex,sharedtrack,10,5.5);
2493 if (besttrack){
2494 shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
2495 }
2496 else return 0;
2497 }
2498 }
2499
2500 if (shared>2.5) return 0;
2501 if (shared>1.0) return besttrack;
2502 //
2503 // don't sign clusters if not gold track
2504 Double_t deltad = besttrack->GetD(GetX(),GetY());
2505 Double_t deltaz = besttrack->GetZat(GetX()) - GetZ();
2506 Double_t deltaprim = TMath::Sqrt(deltad*deltad+deltaz*deltaz);
2507 if (deltaprim>0.1 && (fConstraint[fPass])) return besttrack;
2508 if (TMath::Abs(deltad)>0.1) return besttrack;
2509 if (TMath::Abs(deltaz)>0.1) return besttrack;
2510 if (besttrack->fChi2MIP[0]>4.) return besttrack;
2511 if (besttrack->fChi2MIP[1]>4.) return besttrack;
2512 if (besttrack->fChi2MIP[2]>4.) return besttrack;
2513 if (besttrack->fChi2MIP[3]>4.) return besttrack;
2514 if (fConstraint[fPass]){
2515 //
2516 // sign clusters
2517 //
2518 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
2519 for (Int_t i=0;i<6;i++){
2520 Int_t index = besttrack->fClIndex[i];
2521 if (index<=0) continue;
2522 Int_t ilayer = (index & 0xf0000000) >> 28;
2523 if (besttrack->fSigmaY[ilayer]<0.00000000001) continue;
2524 AliITSclusterV2 *c = (AliITSclusterV2*)GetCluster(index);
2525 if (!c) continue;
2526 if (ilayer>3&&c->GetNy()+c->GetNz()>6) continue;
2527 if ( (c->GetNy()+c->GetNz() )> ny[i]+nz[i]+0.7) continue; //shared track
2528 if ( c->GetNz()> nz[i]+0.7) continue; //shared track
2529 if ( ilayer>2&& besttrack->fNormQ[ilayer]/besttrack->fExpQ>1.5) continue;
2530 //if ( c->GetNy()> ny[i]+0.7) continue; //shared track
2531
2532 Bool_t cansign = kTRUE;
2533 for (Int_t itrack=0;itrack<entries; itrack++){
15dd636f 2534 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
e43c066c 2535 if (!track) continue;
2536 if (track->fChi2MIP[0]>besttrack->fChi2MIP[0]+2.*shared+1.) break;
2537 if ( (track->fClIndex[ilayer]>0) && (track->fClIndex[ilayer]!=besttrack->fClIndex[ilayer])){
2538 cansign = kFALSE;
2539 break;
2540 }
2541 }
2542 if (cansign){
2543 if (TMath::Abs(besttrack->fDy[ilayer]/besttrack->fSigmaY[ilayer])>3.) continue;
2544 if (TMath::Abs(besttrack->fDz[ilayer]/besttrack->fSigmaZ[ilayer])>3.) continue;
2545 if (!c->IsUsed()) c->Use();
2546 }
2547 }
2548 }
2549 return besttrack;
2550}
2551
2552
2553
2554void AliITStrackerMI::GetBestHypothesysMIP(TObjArray &itsTracks)
2555{
2556 //
2557 // get "best" hypothesys
2558 //for (Int_t ilayer=0;ilayer<6;ilayer++) fgLayers[ilayer].ResetWeights();
2559
2560
2561 Int_t nentries = itsTracks.GetEntriesFast();
2562 for (Int_t i=0;i<nentries;i++){
15dd636f 2563 AliITStrackMI* track = (AliITStrackMI*)itsTracks.At(i);
e43c066c 2564 if (!track) continue;
2565 TObjArray * array = (TObjArray*) fTrackHypothesys.At(i);
2566 if (!array) continue;
2567 if (array->GetEntriesFast()<=0) continue;
2568 //
15dd636f 2569 AliITStrackMI* longtrack=0;
e43c066c 2570 Float_t minn=0;
2571 Float_t maxchi2=1000;
2572 for (Int_t j=0;j<array->GetEntriesFast();j++){
15dd636f 2573 AliITStrackMI* track = (AliITStrackMI*)array->At(j);
e43c066c 2574 if (!track) continue;
2575 if (track->GetNumberOfClusters()+track->fNDeadZone<minn) continue;
2576 if (track->GetNumberOfClusters()+track->fNDeadZone>minn) maxchi2 = track->fChi2MIP[0];
2577 if (track->fChi2MIP[0]>maxchi2) continue;
2578 minn= track->GetNumberOfClusters()+track->fNDeadZone;
2579 maxchi2 = track->fChi2MIP[0];
2580 longtrack=track;
2581 break;
2582 }
15dd636f 2583 AliITStrackMI * besttrack = (AliITStrackMI*)array->At(0);
e43c066c 2584 if (!longtrack) {longtrack = besttrack;}
2585 else besttrack= longtrack;
2586 if (besttrack){
2587 Int_t list[6];
2588 AliITSclusterV2 * clist[6];
2589 Float_t shared = GetNumberOfSharedClusters(longtrack,i,list,clist);
2590 //
2591 track->fNUsed = shared;
2592 track->fNSkipped = besttrack->fNSkipped;
2593 track->fChi2MIP[0] = besttrack->fChi2MIP[0];
2594 if (shared>0){
2595 Int_t nshared;
2596 Int_t overlist[6];
2597 //
2598 Int_t sharedtrack = GetOverlapTrack(longtrack, i, nshared, list, overlist);
2599 //if (sharedtrack==-1) sharedtrack=0;
2600 if (sharedtrack>=0){
2601 besttrack = GetBest2Tracks(i,sharedtrack,10,5.5);
2602 }
2603 }
2604 if (besttrack&&fConstraint[fPass])
2605 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
2606 //if (besttrack&&besttrack->fConstrain)
2607 // UpdateESDtrack(besttrack,AliESDtrack::kITSin);
2608 if (besttrack->fChi2MIP[0]+besttrack->fNUsed>1.5){
2609 if ( (TMath::Abs(besttrack->fD[0])>0.1) && fConstraint[fPass]) {
2610 track->fReconstructed= kFALSE;
2611 }
2612 if ( (TMath::Abs(besttrack->fD[1])>0.1) && fConstraint[fPass]){
2613 track->fReconstructed= kFALSE;
2614 }
2615 }
2616
2617 }
2618 }
2619}
2620
2621
15dd636f 2622void AliITStrackerMI::CookLabel(AliITStrackMI *track,Float_t wrong) const {
e43c066c 2623 //--------------------------------------------------------------------
2624 //This function "cooks" a track label. If label<0, this track is fake.
2625 //--------------------------------------------------------------------
2626 Int_t tpcLabel=-1;
2627
2628 if ( track->fESDtrack) tpcLabel = TMath::Abs(track->fESDtrack->GetTPCLabel());
2629
2630 track->fChi2MIP[9]=0;
2631 Int_t nwrong=0;
2632 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
2633 Int_t cindex = track->GetClusterIndex(i);
2634 Int_t l=(cindex & 0xf0000000) >> 28;
2635 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(cindex);
2636 Int_t isWrong=1;
2637 for (Int_t ind=0;ind<3;ind++){
2638 if (tpcLabel>0)
2639 if (cl->GetLabel(ind)==tpcLabel) isWrong=0;
2640 }
2641 track->fChi2MIP[9]+=isWrong*(2<<l);
2642 nwrong+=isWrong;
2643 }
2644 track->fFakeRatio = double(nwrong)/double(track->GetNumberOfClusters());
2645 if (tpcLabel>0){
2646 if (track->fFakeRatio>wrong) track->fLab = -tpcLabel;
2647 else
2648 track->fLab = tpcLabel;
2649 }
2650
2651}
2652
2653
2654
15dd636f 2655void AliITStrackerMI::CookdEdx(AliITStrackMI* track)
e43c066c 2656{
2657 //
2658 //
2659 // Int_t list[6];
2660 //AliITSclusterV2 * clist[6];
2661 // Int_t shared = GetNumberOfSharedClusters(track,index,list,clist);
2662 Float_t dedx[4];
2663 Int_t accepted=0;
2664 track->fChi2MIP[9]=0;
2665 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
2666 Int_t cindex = track->GetClusterIndex(i);
2667 Int_t l=(cindex & 0xf0000000) >> 28;
2668 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(cindex);
2669 Int_t lab = TMath::Abs(track->fESDtrack->GetTPCLabel());
2670 Int_t isWrong=1;
2671 for (Int_t ind=0;ind<3;ind++){
2672 if (cl->GetLabel(ind)==lab) isWrong=0;
2673 }
2674 track->fChi2MIP[9]+=isWrong*(2<<l);
2675 if (l<2) continue;
2676 //if (l>3 && (cl->GetNy()>4) || (cl->GetNz()>4)) continue; //shared track
2677 //if (l>3&& !(cl->GetType()==1||cl->GetType()==10)) continue;
2678 //if (l<4&& !(cl->GetType()==1)) continue;
2679 dedx[accepted]= track->fdEdxSample[i];
2680 //dedx[accepted]= track->fNormQ[l];
2681 accepted++;
2682 }
2683 if (accepted<1) {
2684 track->SetdEdx(0);
2685 return;
2686 }
2687 Int_t indexes[4];
2688 TMath::Sort(accepted,dedx,indexes,kFALSE);
2689 Double_t low=0.;
2690 Double_t up=0.51;
2691 Double_t nl=low*accepted, nu =up*accepted;
2692 Float_t sumamp = 0;
2693 Float_t sumweight =0;
2694 for (Int_t i=0; i<accepted; i++) {
2695 Float_t weight =1;
2696 if (i<nl+0.1) weight = TMath::Max(1.-(nl-i),0.);
2697 if (i>nu-1) weight = TMath::Max(nu-i,0.);
2698 sumamp+= dedx[indexes[i]]*weight;
2699 sumweight+=weight;
2700 }
2701 track->SetdEdx(sumamp/sumweight);
2702}
2703
2704
2705void AliITStrackerMI::MakeCoeficients(Int_t ntracks){
2706 //
2707 //
2708 fCoeficients = new Float_t[ntracks*48];
2709 for (Int_t i=0;i<ntracks*48;i++) fCoeficients[i]=-1.;
2710}
2711
2712
15dd636f 2713Double_t AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSclusterV2 *cluster,Int_t layer)
e43c066c 2714{
2715 //
2716 //
2717 //
2718 Float_t erry,errz;
2719 Float_t theta = track->GetTgl();
2720 Float_t phi = track->GetSnp();
2721 phi = TMath::Sqrt(phi*phi/(1.-phi*phi));
2722 GetError(layer,cluster,theta,phi,track->fExpQ,erry,errz);
2723 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz);
2724 Float_t ny,nz;
2725 GetNTeor(layer,cluster, theta,phi,ny,nz);
2726 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
2727 if (delta>1){
2728 chi2+=0.5*TMath::Min(delta/2,2.);
2729 chi2+=2.*cluster->GetDeltaProbability();
2730 }
2731 //
2732 track->fNy[layer] =ny;
2733 track->fNz[layer] =nz;
2734 track->fSigmaY[layer] = erry;
2735 track->fSigmaZ[layer] = errz;
2736 //track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt(1+theta*theta+phi*phi);
2737 track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt((1.+ track->fP3*track->fP3)/(1.- track->fP2*track->fP2));
2738 return chi2;
2739
2740}
2741
15dd636f 2742Int_t AliITStrackerMI::UpdateMI(AliITStrackMI* track, const AliITSclusterV2* cl,Double_t chi2,Int_t index) const
e43c066c 2743{
2744 //
2745 //
2746 //
2747 Int_t layer = (index & 0xf0000000) >> 28;
2748 track->fClIndex[layer] = index;
2749 if ( (layer>1) &&track->fNormQ[layer]/track->fExpQ<0.5 ) {
2750 chi2+= (0.5-track->fNormQ[layer]/track->fExpQ)*10.;
2751 track->fdEdxMismatch+=(0.5-track->fNormQ[layer]/track->fExpQ)*10.;
2752 }
2753 return track->UpdateMI(cl->GetY(),cl->GetZ(),track->fSigmaY[layer],track->fSigmaZ[layer],chi2,index);
2754}
2755
2756void AliITStrackerMI::GetNTeor(Int_t layer, const AliITSclusterV2* /*cl*/, Float_t theta, Float_t phi, Float_t &ny, Float_t &nz)
2757{
2758 //
2759 //get "mean shape"
2760 //
2761 if (layer==0){
2762 ny = 1.+TMath::Abs(phi)*3.2;
2763 nz = 1.+TMath::Abs(theta)*0.34;
2764 return;
2765 }
2766 if (layer==1){
2767 ny = 1.+TMath::Abs(phi)*3.2;
2768 nz = 1.+TMath::Abs(theta)*0.28;
2769 return;
2770 }
2771
2772 if (layer>3){
2773 ny = 2.02+TMath::Abs(phi)*1.95;
2774 nz = 2.02+TMath::Abs(phi)*2.35;
2775 return;
2776 }
4c53440c 2777 ny = 6.6-2.7*TMath::Abs(phi);
e43c066c 2778 nz = 2.8-3.11*TMath::Abs(phi)+0.45*TMath::Abs(theta);
2779}
2780
2781
2782
2783Int_t AliITStrackerMI::GetError(Int_t layer, const AliITSclusterV2*cl, Float_t theta, Float_t phi,Float_t expQ, Float_t &erry, Float_t &errz)
2784{
2785 //calculate cluster position error
2786 //
2787 Float_t nz,ny;
2788 GetNTeor(layer, cl,theta,phi,ny,nz);
2789 erry = TMath::Sqrt(cl->GetSigmaY2());
2790 errz = TMath::Sqrt(cl->GetSigmaZ2());
2791 //
2792 // PIXELS
2793 if (layer<2){
2794
2795 if (TMath::Abs(ny-cl->GetNy())>0.6) {
2796 if (ny<cl->GetNy()){
2797 erry*=0.4+TMath::Abs(ny-cl->GetNy());
2798 errz*=0.4+TMath::Abs(ny-cl->GetNy());
2799 }else{
2800 erry*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
2801 errz*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
2802 }
2803 }
2804 if (TMath::Abs(nz-cl->GetNz())>1.) {
2805 erry*=TMath::Abs(nz-cl->GetNz());
2806 errz*=TMath::Abs(nz-cl->GetNz());
2807 }
2808 erry*=0.85;
2809 errz*=0.85;
2810 erry= TMath::Min(erry,float(0.005));
2811 errz= TMath::Min(errz,float(0.03));
2812 return 10;
2813 }
2814
2815//STRIPS
2816 if (layer>3){
2817 if (cl->GetNy()==100||cl->GetNz()==100){
2818 erry = 0.004;
2819 errz = 0.2;
2820 return 100;
2821 }
2822 if (cl->GetNy()+cl->GetNz()>12){
2823 erry = 0.06;
2824 errz = 0.57;
2825 return 100;
2826 }
2827 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
2828 Float_t chargematch = TMath::Max(double(normq/expQ),2.);
2829 //
2830 if (cl->GetType()==1 || cl->GetType()==10 ){
2831 if (chargematch<1.0 || (cl->GetNy()+cl->GetNz()<nz+ny+0.5)){
2832 errz = 0.043;
2833 erry = 0.00094;
2834 return 101;
2835 }
2836 if (cl->GetNy()+cl->GetNz()<nz+ny+1.2){
2837 errz = 0.06;
2838 erry =0.0013;
2839 return 102;
2840 }
2841 erry = 0.0027;
2842 errz = TMath::Min(0.028*(chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.15);
2843 return 103;
2844 }
2845 if (cl->GetType()==2 || cl->GetType()==11 ){
2846 erry = TMath::Min(0.0010*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.05);
2847 errz = TMath::Min(0.025*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.5);
2848 return 104;
2849 }
2850
2851 if (cl->GetType()>100 ){
2852 if ((chargematch+cl->GetNy()+cl->GetNz()-nz-ny<1.5)){
2853 errz = 0.05;
2854 erry = 0.00096;
2855 return 105;
2856 }
2857 if (cl->GetNy()+cl->GetNz()-nz-ny<1){
2858 errz = 0.10;
2859 erry = 0.0025;
2860 return 106;
2861 }
2862
2863 errz = TMath::Min(0.05*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.4);
2864 erry = TMath::Min(0.003*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.05);
2865 return 107;
2866 }
2867 Float_t diff = cl->GetNy()+cl->GetNz()-ny-nz;
2868 if (diff<1) diff=1;
2869 if (diff>4) diff=4;
2870
2871 if (cl->GetType()==5||cl->GetType()==6||cl->GetType()==7||cl->GetType()==8){
2872 errz = 0.14*diff;
2873 erry = 0.003*diff;
2874 return 108;
2875 }
2876 erry = 0.04*diff;
2877 errz = 0.06*diff;
2878 return 109;
2879 }
2880 //DRIFTS
2881 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
2882 Float_t chargematch = normq/expQ;
2883 Float_t factorz=1;
2884 Int_t cnz = cl->GetNz()%10;
2885 //charge match
2886 if (cl->GetType()==1){
2887 if (chargematch<1.25){
2888 erry = 0.0028*(1.+6./cl->GetQ()); // gold clusters
2889 }
2890 else{
2891 erry = 0.003*chargematch;
2892 if (cl->GetNz()==3) erry*=1.5;
2893 }
2894 if (chargematch<1.0){
2895 errz = 0.0011*(1.+6./cl->GetQ());
2896 }
2897 else{
2898 errz = 0.002*(1+2*(chargematch-1.));
2899 }
2900 if (cnz>nz+0.6) {
2901 erry*=(cnz-nz+0.5);
2902 errz*=1.4*(cnz-nz+0.5);
2903 }
2904 }
2905 if (cl->GetType()>1){
2906 if (chargematch<1){
2907 erry = 0.00385*(1.+6./cl->GetQ()); // gold clusters
2908 errz = 0.0016*(1.+6./cl->GetQ());
2909 }
2910 else{
2911 errz = 0.0014*(1+3*(chargematch-1.));
2912 erry = 0.003*(1+3*(chargematch-1.));
2913 }
2914 if (cnz>nz+0.6) {
2915 erry*=(cnz-nz+0.5);
2916 errz*=1.4*(cnz-nz+0.5);
2917 }
2918 }
2919
2920 if (TMath::Abs(cl->GetY())>2.5){
2921 factorz*=1+2*(TMath::Abs(cl->GetY())-2.5);
2922 }
2923 if (TMath::Abs(cl->GetY())<1){
2924 factorz*=1.+0.5*TMath::Abs(TMath::Abs(cl->GetY())-1.);
2925 }
2926 factorz= TMath::Min(factorz,float(4.));
2927 errz*=factorz;
2928
2929 erry= TMath::Min(erry,float(0.05));
2930 errz= TMath::Min(errz,float(0.05));
2931 return 200;
2932}
2933
2934
2935
2936void AliITStrackerMI::SignDeltas( TObjArray *ClusterArray, Float_t vz)
2937{
2938 //
2939 //
2940 Int_t entries = ClusterArray->GetEntriesFast();
2941 if (entries<4) return;
2942 AliITSclusterV2* cluster = (AliITSclusterV2*)ClusterArray->At(0);
2943 Int_t layer = cluster->GetLayer();
2944 if (layer>1) return;
2945 Int_t index[10000];
2946 Int_t ncandidates=0;
2947 Float_t r = (layer>0)? 7:4;
2948 //
2949 for (Int_t i=0;i<entries;i++){
2950 AliITSclusterV2* cl0 = (AliITSclusterV2*)ClusterArray->At(i);
2951 Float_t nz = 1+TMath::Abs((cl0->GetZ()-vz)/r);
2952 if (cl0->GetNy()+cl0->GetNz()<=5+2*layer+nz) continue;
2953 index[ncandidates] = i; //candidate to belong to delta electron track
2954 ncandidates++;
2955 if (cl0->GetNy()+cl0->GetNz()>9+2*layer+nz) {
2956 cl0->SetDeltaProbability(1);
2957 }
2958 }
2959 //
2960 //
2961 //
2962 for (Int_t i=0;i<ncandidates;i++){
2963 AliITSclusterV2* cl0 = (AliITSclusterV2*)ClusterArray->At(index[i]);
2964 if (cl0->GetDeltaProbability()>0.8) continue;
2965 //
2966 Int_t ncl = 0;
2967 Float_t y[100],z[100],sumy,sumz,sumy2, sumyz, sumw;
2968 sumy=sumz=sumy2=sumyz=sumw=0.0;
2969 for (Int_t j=0;j<ncandidates;j++){
2970 if (i==j) continue;
2971 AliITSclusterV2* cl1 = (AliITSclusterV2*)ClusterArray->At(index[j]);
2972 //
2973 Float_t dz = cl0->GetZ()-cl1->GetZ();
2974 Float_t dy = cl0->GetY()-cl1->GetY();
2975 if (TMath::Sqrt(dz*dz+dy*dy)<0.2){
2976 Float_t weight = cl1->GetNy()+cl1->GetNz()-2;
2977 y[ncl] = cl1->GetY();
2978 z[ncl] = cl1->GetZ();
2979 sumy+= y[ncl]*weight;
2980 sumz+= z[ncl]*weight;
2981 sumy2+=y[ncl]*y[ncl]*weight;
2982 sumyz+=y[ncl]*z[ncl]*weight;
2983 sumw+=weight;
2984 ncl++;
2985 }
2986 }
2987 if (ncl<4) continue;
2988 Float_t det = sumw*sumy2 - sumy*sumy;
2989 Float_t delta=1000;
2990 if (TMath::Abs(det)>0.01){
2991 Float_t z0 = (sumy2*sumz - sumy*sumyz)/det;
2992 Float_t k = (sumyz*sumw - sumy*sumz)/det;
2993 delta = TMath::Abs(cl0->GetZ()-(z0+k*cl0->GetY()));
2994 }
2995 else{
2996 Float_t z0 = sumyz/sumy;
2997 delta = TMath::Abs(cl0->GetZ()-z0);
2998 }
2999 if ( delta<0.05) {
3000 cl0->SetDeltaProbability(1-20.*delta);
3001 }
3002 }
3003}
3004
3005
15dd636f 3006void AliITStrackerMI::UpdateESDtrack(AliITStrackMI* track, ULong_t flags) const
e43c066c 3007{
3008 //
3009 //
3010 track->UpdateESDtrack(flags);
15dd636f 3011 AliITStrackMI * oldtrack = (AliITStrackMI*)(track->fESDtrack->GetITStrack());
99c2ee26 3012 if (oldtrack) delete oldtrack;
15dd636f 3013 track->fESDtrack->SetITStrack(new AliITStrackMI(*track));
e43c066c 3014}
3015
3016
3017
3018
51ad6848 3019
3020
3021
3022
3023void AliITStrackerMI::FindV0(AliESD *event)
e43c066c 3024{
3025 //
3026 // fast V0 finder
3027 //
51ad6848 3028 //fV0Array->Clean();
e43c066c 3029 AliHelix helixes[30000];
3030 TObjArray trackarray(30000);
3031 Float_t dist[30000];
51ad6848 3032 Float_t mindist[30000];
3033 AliESDV0MI *vertexarray = new AliESDV0MI[20000];
3034 AliV0vertex *oldvertexarray = new AliV0vertex[20000];
3035 AliESDV0MI *pvertex = &vertexarray[0];
3036
3037
e43c066c 3038 //
3039 Int_t entries = fTrackHypothesys.GetEntriesFast();
3040 for (Int_t i=0;i<entries;i++){
3041 TObjArray * array = (TObjArray*)fTrackHypothesys.At(i);
3042 if (!array) continue;
15dd636f 3043 AliITStrackMI * track = (AliITStrackMI*)array->At(fBestTrackIndex[i]);
e43c066c 3044 if (track){
3045 dist[i] = TMath::Sqrt(track->fD[0]*track->fD[0]+track->fD[1]*track->fD[1]);
51ad6848 3046 Float_t pt1 = TMath::Abs(track->fP4*track->GetConvConst());
3047 mindist[i] = TMath::Min(0.02+0.03*pt1,0.15);
3048 if (mindist[i]<0.05) mindist[i]=0.05;
e43c066c 3049 trackarray.AddAt(track,i);
3050 new (&helixes[i]) AliHelix(*track);
3051 }
3052 }
51ad6848 3053 // Int_t multifound=0;
3054 Int_t vertexall =0;
3055 AliESDV0MI tempvertex;
3056 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
3057
e43c066c 3058 for (Int_t itrack0=0;itrack0<entries;itrack0++){
15dd636f 3059 AliITStrackMI * track0 = (AliITStrackMI*)trackarray.At(itrack0);
e43c066c 3060 if (!track0) continue;
51ad6848 3061 if (track0->fP4>0) continue;
3062 if (dist[itrack0]<mindist[itrack0]) continue;
3063 Int_t vertexes =0;
3064 //
3065 for (Int_t itrack1=0;itrack1<entries;itrack1++){
15dd636f 3066 AliITStrackMI * track1 = (AliITStrackMI*)trackarray.At(itrack1);
e43c066c 3067 if (!track1) continue;
51ad6848 3068 if (track1->fP4<0) continue;
3069 if (dist[itrack1]<mindist[itrack1]) continue;
3070 //
e43c066c 3071 AliHelix *h1 = &helixes[itrack0];
51ad6848 3072 AliHelix *h2 = &helixes[itrack1];
3073 Double_t distance = TestV0(h1,h2,pvertex);
e43c066c 3074 if (distance>0.4) continue;
51ad6848 3075 //
3076 if (distance>0.3*(dist[itrack1]+dist[itrack0])) continue;
3077 //if (distance>0.2*dist[itrack0]) continue;
3078 if (pvertex->fRr<0.3*(dist[itrack1]+dist[itrack0])) continue;
3079 if (pvertex->fRr>27) continue;
3080 pvertex->SetM(*track0);
3081 pvertex->SetP(*track1);
3082 pvertex->Update(primvertex);
3083 //
3084 //
3085 if (pvertex->fPointAngle<0.85) continue;
3086 //
3087 //
3088 pvertex->fLab[0]=track0->GetLabel();
3089 pvertex->fLab[1]=track1->GetLabel();
3090 pvertex->fIndex[0] = track0->GetESDtrack()->GetID();
3091 pvertex->fIndex[1] = track1->GetESDtrack()->GetID();
3092 // calculate chi2s
3093 //
3094 pvertex->fChi2After = 0;
3095 pvertex->fChi2Before = 0;
3096 pvertex->fNBefore=0;
3097 pvertex->fNAfter=0;
e43c066c 3098
51ad6848 3099 for (Int_t i=0;i<6;i++){
3100 Float_t radius = fgLayers[i].GetR();
3101 if (pvertex->fRr>radius+0.5){
3102 pvertex->fNBefore+=2.;
3103 //
3104 if (track0->fClIndex[i]<=0) {
3105 pvertex->fChi2Before+=9;
3106 }else{
3107 Float_t chi2 = track0->fDy[i]*track0->fDy[i]/(track0->fSigmaY[i]*track0->fSigmaY[i])+
3108 track0->fDz[i]*track0->fDz[i]/(track0->fSigmaZ[i]*track0->fSigmaZ[i]);
3109 pvertex->fChi2Before+=chi2;
3110 }
3111
3112 if (track1->fClIndex[i]<=0) {
3113 pvertex->fChi2Before+=9;
3114 }else{
3115 Float_t chi2 = track1->fDy[i]*track1->fDy[i]/(track1->fSigmaY[i]*track1->fSigmaY[i])+
3116 track1->fDz[i]*track1->fDz[i]/(track1->fSigmaZ[i]*track1->fSigmaZ[i]);
3117 pvertex->fChi2Before+=chi2;
3118 }
3119 }
3120
3121 if (pvertex->fRr<radius-0.5){
3122 pvertex->fNAfter+=2.;
3123 //
3124 if (track0->fClIndex[i]<=0) {
3125 pvertex->fChi2After+=9;
3126 }else{
3127 Float_t chi2 = track0->fDy[i]*track0->fDy[i]/(track0->fSigmaY[i]*track0->fSigmaY[i])+
3128 track0->fDz[i]*track0->fDz[i]/(track0->fSigmaZ[i]*track0->fSigmaZ[i]);
3129 pvertex->fChi2After+=chi2;
3130 }
3131
3132 if (track1->fClIndex[i]<=0) {
3133 pvertex->fChi2After+=9;
3134 }else{
3135 Float_t chi2 = track1->fDy[i]*track1->fDy[i]/(track1->fSigmaY[i]*track1->fSigmaY[i])+
3136 track1->fDz[i]*track1->fDz[i]/(track1->fSigmaZ[i]*track1->fSigmaZ[i]);
3137 pvertex->fChi2After+=chi2;
3138 }
3139 }
e43c066c 3140 }
51ad6848 3141 if (pvertex->fNBefore>2){
3142 if (pvertex->fChi2Before/pvertex->fNBefore<4.) continue; //have clusters before vetex
3143 }
3144 distance = FindBestPair(itrack0,itrack1,pvertex);
3145 if (pvertex->fPointAngle<0.85) continue;
3146 //
3147 if (distance>0.3) continue;
3148 // if (pvertex->fDistSigma*6>pvertex->fRr) continue;
3149 // if (pvertex->fDistSigma>0.4) continue;
3150 //if (pvertex->fDistNorm>5.5) continue;
3151 new (&oldvertexarray[vertexall]) AliV0vertex(*track0,*track1) ;
3152 vertexes++;
3153 vertexall++;
3154 pvertex = &vertexarray[vertexall];
3155 }
3156 }
3157 // printf("\n\n\nMultifound\t%d\n\n\n",multifound);
3158 //
3159 // sort vertices according quality
3160 Float_t quality[10000];
3161 Int_t indexes[10000];
3162 Int_t trackvertices[30000];
3163 for (Int_t i=0;i<entries;i++) trackvertices[i]=0;
3164 for (Int_t i=0;i<vertexall;i++) quality[i] = 1.-vertexarray[i].fPointAngle;
3165 TMath::Sort(vertexall,quality,indexes,kFALSE);
3166
3167 for (Int_t i=0;i<vertexall;i++){
3168 pvertex= &vertexarray[indexes[i]];
3169 Int_t index0 = vertexarray[indexes[i]].fIndex[0];
3170 Int_t index1 = vertexarray[indexes[i]].fIndex[1];
3171 vertexarray[indexes[i]].fOrder[2] = i;
3172 vertexarray[indexes[i]].fOrder[1] = trackvertices[index1];
3173 vertexarray[indexes[i]].fOrder[0] = trackvertices[index0];
3174 if (trackvertices[index1]+trackvertices[index0]>2) continue;
3175 if (trackvertices[index1]+trackvertices[index0]>0) {
3176 // if (pvertex->fPointAngle<0.995) continue;
3177 }
3178 trackvertices[index0]++;
3179 trackvertices[index1]++;
3180
3181 // event->AddV0(&oldvertexarray[indexes[i]]);
3182 Int_t v0index = event->AddV0MI(&vertexarray[indexes[i]]);
3183 AliESDtrack * ptrack0 = event->GetTrack(vertexarray[indexes[i]].fIndex[0]);
3184 AliESDtrack * ptrack1 = event->GetTrack(vertexarray[indexes[i]].fIndex[1]);
3185 if (!ptrack0 || !ptrack1){
3186 printf("BBBBBBBUUUUUUUUUUGGGGGGGGGG\n");
3187 }
3188 Int_t v0index0[3]={ptrack0->GetV0Index(0),ptrack0->GetV0Index(1),ptrack0->GetV0Index(2)};
3189 Int_t v0index1[3]={ptrack1->GetV0Index(0),ptrack1->GetV0Index(1),ptrack1->GetV0Index(2)};
3190 for (Int_t i=0;i<3;i++){
3191 if (v0index0[i]<0) {
3192 v0index0[i]=v0index;
3193 ptrack0->SetV0Indexes(v0index0);
3194 break;
e43c066c 3195 }
51ad6848 3196 }
3197 for (Int_t i=0;i<3;i++){
3198 if (v0index1[i]<0) {
3199 v0index1[i]=v0index;
3200 ptrack1->SetV0Indexes(v0index1);
3201 break;
e43c066c 3202 }
51ad6848 3203 }
e43c066c 3204 }
51ad6848 3205 delete[] vertexarray;
3206 delete[] oldvertexarray;
e43c066c 3207}
3208
51ad6848 3209
3210Double_t AliITStrackerMI::FindBestPair(Int_t esdtrack0, Int_t esdtrack1, AliESDV0MI *vertex)
e43c066c 3211{
3212 //
3213 // try to find best pair from the tree of track hyp.
3214 //
3215 TObjArray * array0 = (TObjArray*)fTrackHypothesys.At(esdtrack0);
3216 Int_t entries0 = array0->GetEntriesFast();
3217 TObjArray * array1 = (TObjArray*)fTrackHypothesys.At(esdtrack1);
3218 Int_t entries1 = array1->GetEntriesFast();
51ad6848 3219 // Float_t primvertex[3]={GetX(),GetY(),GetZ()};
e43c066c 3220 //
3221 //
51ad6848 3222 //AliESDV0MI v0;
e43c066c 3223 Double_t criticalradius = vertex->fRr;
e43c066c 3224 //
51ad6848 3225 AliITStrackMI * track0= (AliITStrackMI*)array0->At(fBestTrackIndex[esdtrack0]);
3226 AliITStrackMI * track1= (AliITStrackMI*)array1->At(fBestTrackIndex[esdtrack1]);
3227 //
3228 // find the best tracks after decay point
e43c066c 3229 for (Int_t itrack0=0;itrack0<entries0;itrack0++){
51ad6848 3230 AliITStrackMI * track = (AliITStrackMI*)array0->At(itrack0);
3231 if (!track) continue;
3232 if (track->fX<criticalradius-1) continue;
3233 if (track->fX>criticalradius){
3234 track0 = track;
3235 break;
e43c066c 3236 }
3237 }
e43c066c 3238
51ad6848 3239 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
3240 AliITStrackMI * track = (AliITStrackMI*)array1->At(itrack1);
3241 if (!track) continue;
3242 if (track->fX<criticalradius-1) continue;
3243 if (track->fX>criticalradius){
3244 track1 = track;
3245 break;
3246 }
3247 }
3248 //propagate to vertex
3249 Double_t alpha = TMath::ATan2(vertex->fXr[1],vertex->fXr[0]);
3250 Double_t radius =TMath::Sqrt(vertex->fXr[1]*vertex->fXr[1]+vertex->fXr[0]*vertex->fXr[0]);
3251 AliITStrackMI track0p = *track0;
3252 AliITStrackMI track1p = *track1;
3253 if (!track0p.Propagate(alpha,radius)) return 100000;
3254 if (!track1p.Propagate(alpha,radius)) return 100000;
3255 //track0p.Propagate(alpha,radius);
3256 //track1p.Propagate(alpha,radius);
3257 //
3258 //
3259 //vertex2->SetM(track0p);
3260 //vertex2->SetP(track1p);
3261 //vertex2->Update(primvertex);
3262 //
3263 AliHelix h0(track0p);
3264 AliHelix h1(track1p);
3265 Double_t distance = TestV0(&h0,&h1,vertex);
3266 Float_t v[3]={GetX(),GetY(),GetZ()};
3267 // vertex->Update(v,track0->fMass, track1->fMass);
3268 vertex->SetM(*track0);
3269 vertex->SetP(*track1);
3270 vertex->Update(v);
3271 Float_t sigma = TMath::Sqrt(track1p.GetSigmaY2()+track1p.GetSigmaZ2()+track0p.GetSigmaY2()+track0p.GetSigmaZ2());
3272 vertex->fDistNorm = distance/sigma;
3273 vertex->fDistSigma = sigma;
3274 return distance;
e43c066c 3275}
3276
3277
3278
51ad6848 3279Double_t AliITStrackerMI::TestV0(AliHelix *helix1, AliHelix *helix2, AliESDV0MI *vertex)
e43c066c 3280{
3281 //
3282 // test the helixes for the distnce calculate vertex characteristic
3283 //
3284 Float_t distance1,distance2;
3285 AliHelix & dhelix1 = *helix1;
3286 Double_t pp[3],xx[3];
3287 dhelix1.GetMomentum(0,pp,0);
3288 dhelix1.Evaluate(0,xx);
3289 AliHelix &mhelix = *helix2;
3290 //
3291 //find intersection linear
3292 //
3293 Double_t phase[2][2],radius[2];
3294 Int_t points = dhelix1.GetRPHIintersections(mhelix, phase, radius);
3295 Double_t delta1=10000,delta2=10000;
3296
3297 if (points>0){
3298 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
3299 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
3300 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
3301 }
3302 if (points==2){
3303 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
3304 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
3305 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
3306 }
3307 distance1 = TMath::Min(delta1,delta2);
3308 vertex->fDist1 = TMath::Sqrt(distance1);
3309 //
3310 //find intersection parabolic
3311 //
3312 points = dhelix1.GetRPHIintersections(mhelix, phase, radius);
3313 delta1=10000,delta2=10000;
3314
3315 if (points>0){
3316 dhelix1.ParabolicDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
3317 }
3318 if (points==2){
3319 dhelix1.ParabolicDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
3320 }
3321
3322 distance2 = TMath::Min(delta1,delta2);
3323 vertex->fDist2 = TMath::Sqrt(distance2);
3324 if (distance2<100){
3325 if (delta1<delta2){
3326 //get V0 info
3327 dhelix1.Evaluate(phase[0][0],vertex->fXr);
51ad6848 3328 dhelix1.GetMomentum(phase[0][0],vertex->fPP);
3329 mhelix.GetMomentum(phase[0][1],vertex->fPM);
e43c066c 3330 dhelix1.GetAngle(phase[0][0],mhelix,phase[0][1],vertex->fAngle);
3331 vertex->fRr = TMath::Sqrt(radius[0]);
3332 }
3333 else{
3334 dhelix1.Evaluate(phase[1][0],vertex->fXr);
51ad6848 3335 dhelix1.GetMomentum(phase[1][0],vertex->fPP);
3336 mhelix.GetMomentum(phase[1][1],vertex->fPM);
e43c066c 3337 dhelix1.GetAngle(phase[1][0],mhelix,phase[1][1],vertex->fAngle);
3338 vertex->fRr = TMath::Sqrt(radius[1]);
3339 }
3340 }
3341 //
3342 //
3343 return vertex->fDist2;
3344}
3345
51ad6848 3346
3347
3348
3349
3350
3351