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Method GetTrackPoint now works with mis-aligned geometry (L. Gaudichet)
[u/mrichter/AliRoot.git] / ITS / AliITStrackerMI.cxx
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e43c066c 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
bf6adc12 16/* $Id$ */
17
e43c066c 18//-------------------------------------------------------------------------
19// Implementation of the ITS tracker class
00a7cc50 20// It reads AliITSRecPoint clusters and creates AliITStrackMI tracks
e43c066c 21// and fills with them the ESD
15dd636f 22// Origin: Marian Ivanov, CERN, Marian.Ivanov@cern.ch
e43c066c 23// dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
f43e383b 24//
e43c066c 25//-------------------------------------------------------------------------
bf6adc12 26
27#include <TMatrixD.h>
e43c066c 28#include <TTree.h>
bf6adc12 29#include <TTreeStream.h>
30#include <TTree.h>
31
e43c066c 32#include "AliESD.h"
6c94f330 33#include "AliV0.h"
bf6adc12 34#include "AliHelix.h"
00a7cc50 35#include "AliITSRecPoint.h"
bf6adc12 36#include "AliITSgeom.h"
e43c066c 37#include "AliITStrackerMI.h"
df29e9a4 38#include "AliTrackPointArray.h"
39#include "AliAlignObj.h"
e43c066c 40
41ClassImp(AliITStrackerMI)
e43c066c 42
43
44
45AliITStrackerMI::AliITSlayer AliITStrackerMI::fgLayers[kMaxLayer]; // ITS layers
8221b41b 46AliITStrackerMI::AliITStrackerMI():AliTracker(),
47fI(0),
48fBestTrack(),
49fTrackToFollow(),
50fTrackHypothesys(),
51fBestHypothesys(),
52fOriginal(),
53fCurrentEsdTrack(),
54fPass(0),
55fAfterV0(kFALSE),
56fLastLayerToTrackTo(0),
57fCoeficients(0),
58fEsd(0),
59fDebugStreamer(0){
60 //Default constructor
61}
62
e43c066c 63
8221b41b 64AliITStrackerMI::AliITStrackerMI(const AliITSgeom *geom) : AliTracker(),
65fI(kMaxLayer),
66fBestTrack(),
67fTrackToFollow(),
68fTrackHypothesys(),
69fBestHypothesys(),
70fOriginal(),
71fCurrentEsdTrack(),
72fPass(0),
73fAfterV0(kFALSE),
74fLastLayerToTrackTo(kLastLayerToTrackTo),
75fCoeficients(0),
76fEsd(0),
77fDebugStreamer(0){
e43c066c 78 //--------------------------------------------------------------------
79 //This is the AliITStrackerMI constructor
80 //--------------------------------------------------------------------
628e7bb0 81 fCoeficients = 0;
82 fAfterV0 = kFALSE;
e43c066c 83 AliITSgeom *g=(AliITSgeom*)geom;
e43c066c 84 Float_t x,y,z;
85 Int_t i;
86 for (i=1; i<kMaxLayer+1; i++) {
87 Int_t nlad=g->GetNladders(i);
88 Int_t ndet=g->GetNdetectors(i);
89
90 g->GetTrans(i,1,1,x,y,z);
91 Double_t r=TMath::Sqrt(x*x + y*y);
92 Double_t poff=TMath::ATan2(y,x);
93 Double_t zoff=z;
94
95 g->GetTrans(i,1,2,x,y,z);
96 r += TMath::Sqrt(x*x + y*y);
97 g->GetTrans(i,2,1,x,y,z);
98 r += TMath::Sqrt(x*x + y*y);
99 g->GetTrans(i,2,2,x,y,z);
100 r += TMath::Sqrt(x*x + y*y);
101 r*=0.25;
102
103 new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet);
104
105 for (Int_t j=1; j<nlad+1; j++) {
106 for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors
107 Float_t x,y,zshift; g->GetTrans(i,j,k,x,y,zshift);
108 Double_t rot[9]; g->GetRotMatrix(i,j,k,rot);
109
110 Double_t phi=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
111 phi+=TMath::Pi()/2;
112 if (i==1) phi+=TMath::Pi();
113 Double_t cp=TMath::Cos(phi), sp=TMath::Sin(phi);
114 Double_t r=x*cp+y*sp;
115
116 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
117 new(&det) AliITSdetector(r,phi);
118 }
119 }
120
121 }
122
123 fI=kMaxLayer;
124
125 fPass=0;
126 fConstraint[0]=1; fConstraint[1]=0;
127
128 Double_t xyz[]={kXV,kYV,kZV}, ers[]={kSigmaXV,kSigmaYV,kSigmaZV};
129 SetVertex(xyz,ers);
130
131 for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=kLayersNotToSkip[i];
132 fLastLayerToTrackTo=kLastLayerToTrackTo;
628e7bb0 133 for (Int_t i=0;i<100000;i++){
134 fBestTrackIndex[i]=0;
135 }
81e97e0d 136 //
137 fDebugStreamer = new TTreeSRedirector("ITSdebug.root");
138
628e7bb0 139}
e43c066c 140
8221b41b 141AliITStrackerMI::AliITStrackerMI(const AliITStrackerMI &tracker):AliTracker(tracker),
142fI(tracker.fI),
143fBestTrack(tracker.fBestTrack),
144fTrackToFollow(tracker.fTrackToFollow),
145fTrackHypothesys(tracker.fTrackHypothesys),
146fBestHypothesys(tracker.fBestHypothesys),
147fOriginal(tracker.fOriginal),
148fCurrentEsdTrack(tracker.fCurrentEsdTrack),
149fPass(tracker.fPass),
150fAfterV0(tracker.fAfterV0),
151fLastLayerToTrackTo(tracker.fLastLayerToTrackTo),
152fCoeficients(tracker.fCoeficients),
153fEsd(tracker.fEsd),
154fDebugStreamer(tracker.fDebugStreamer){
155 //Copy constructor
156}
157
158AliITStrackerMI & AliITStrackerMI::operator=(const AliITStrackerMI &tracker){
159 //Assignment operator
160 this->~AliITStrackerMI();
161 new(this) AliITStrackerMI(tracker);
162 return *this;
163}
164
165
628e7bb0 166AliITStrackerMI::~AliITStrackerMI()
167{
168 //
169 //destructor
170 //
171 if (fCoeficients) delete []fCoeficients;
81e97e0d 172 if (fDebugStreamer) {
173 //fDebugStreamer->Close();
174 delete fDebugStreamer;
175 }
e43c066c 176}
177
178void AliITStrackerMI::SetLayersNotToSkip(Int_t *l) {
179 //--------------------------------------------------------------------
180 //This function set masks of the layers which must be not skipped
181 //--------------------------------------------------------------------
182 for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=l[i];
183}
184
185Int_t AliITStrackerMI::LoadClusters(TTree *cTree) {
186 //--------------------------------------------------------------------
187 //This function loads ITS clusters
188 //--------------------------------------------------------------------
00a7cc50 189 TBranch *branch=cTree->GetBranch("ITSRecPoints");
e43c066c 190 if (!branch) {
191 Error("LoadClusters"," can't get the branch !\n");
192 return 1;
193 }
194
00a7cc50 195 TClonesArray dummy("AliITSRecPoint",10000), *clusters=&dummy;
e43c066c 196 branch->SetAddress(&clusters);
197
198 Int_t j=0;
199 Int_t detector=0;
200 for (Int_t i=0; i<kMaxLayer; i++) {
201 Int_t ndet=fgLayers[i].GetNdetectors();
202 Int_t jmax = j + fgLayers[i].GetNladders()*ndet;
203 for (; j<jmax; j++) {
204 if (!cTree->GetEvent(j)) continue;
205 Int_t ncl=clusters->GetEntriesFast();
206 SignDeltas(clusters,GetZ());
207 while (ncl--) {
00a7cc50 208 AliITSRecPoint *c=(AliITSRecPoint*)clusters->UncheckedAt(ncl);
e43c066c 209 detector = c->GetDetectorIndex();
00a7cc50 210 fgLayers[i].InsertCluster(new AliITSRecPoint(*c));
e43c066c 211 }
212 clusters->Delete();
213 //add dead zone virtual "cluster"
214 if (i<2){
215 for (Float_t ydead = 0; ydead < 1.31 ; ydead+=(i+1.)*0.018){
216 Int_t lab[4] = {0,0,0,detector};
217 Int_t info[3] = {0,0,0};
218 Float_t hit[5]={0,0,0.004/12.,0.001/12.,0};
219 if (i==0) hit[0] =ydead-0.4;
220 if (i==1) hit[0]=ydead-3.75;
221 hit[1] =-0.04;
222 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
00a7cc50 223 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
e43c066c 224 hit[1]=-7.05;
225 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
00a7cc50 226 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
e43c066c 227 hit[1]=-7.15;
228 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
00a7cc50 229 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
e43c066c 230 hit[1] =0.06;
231 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
00a7cc50 232 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
e43c066c 233 hit[1]=7.05;
234 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
00a7cc50 235 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
e43c066c 236 hit[1]=7.25;
237 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
00a7cc50 238 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
e43c066c 239 }
240 }
241
242 }
243 //
244 fgLayers[i].ResetRoad(); //road defined by the cluster density
245 fgLayers[i].SortClusters();
246 }
247
248 return 0;
249}
250
251void AliITStrackerMI::UnloadClusters() {
252 //--------------------------------------------------------------------
253 //This function unloads ITS clusters
254 //--------------------------------------------------------------------
255 for (Int_t i=0; i<kMaxLayer; i++) fgLayers[i].ResetClusters();
256}
257
15dd636f 258static Int_t CorrectForDeadZoneMaterial(AliITStrackMI *t) {
e43c066c 259 //--------------------------------------------------------------------
260 // Correction for the material between the TPC and the ITS
261 // (should it belong to the TPC code ?)
262 //--------------------------------------------------------------------
263 Double_t riw=80., diw=0.0053, x0iw=30; // TPC inner wall ?
264 Double_t rcd=61., dcd=0.0053, x0cd=30; // TPC "central drum" ?
265 Double_t yr=12.8, dr=0.03; // rods ?
266 Double_t zm=0.2, dm=0.40; // membrane
267 //Double_t rr=52., dr=0.19, x0r=24., yyr=7.77; //rails
268 Double_t rs=50., ds=0.001; // something belonging to the ITS (screen ?)
269
270 if (t->GetX() > riw) {
271 if (!t->PropagateTo(riw,diw,x0iw)) return 1;
272 if (TMath::Abs(t->GetY())>yr) t->CorrectForMaterial(dr);
273 if (TMath::Abs(t->GetZ())<zm) t->CorrectForMaterial(dm);
274 if (!t->PropagateTo(rcd,dcd,x0cd)) return 1;
275 //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z);
276 //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,dr,x0r);
277 if (!t->PropagateTo(rs,ds)) return 1;
278 } else if (t->GetX() < rs) {
279 if (!t->PropagateTo(rs,-ds)) return 1;
280 //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z);
281 //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,-dr,x0r);
282 if (!t->PropagateTo(rcd,-dcd,x0cd)) return 1;
283 if (!t->PropagateTo(riw+0.001,-diw,x0iw)) return 1;
284 } else {
285 ::Error("CorrectForDeadZoneMaterial","track is already in the dead zone !");
286 return 1;
287 }
288
289 return 0;
290}
291
292Int_t AliITStrackerMI::Clusters2Tracks(AliESD *event) {
293 //--------------------------------------------------------------------
294 // This functions reconstructs ITS tracks
295 // The clusters must be already loaded !
296 //--------------------------------------------------------------------
297 TObjArray itsTracks(15000);
628e7bb0 298 fOriginal.Clear();
81e97e0d 299 fEsd = event; // store pointer to the esd
e43c066c 300 {/* Read ESD tracks */
301 Int_t nentr=event->GetNumberOfTracks();
302 Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr);
303 while (nentr--) {
304 AliESDtrack *esd=event->GetTrack(nentr);
305
306 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue;
307 if (esd->GetStatus()&AliESDtrack::kTPCout) continue;
308 if (esd->GetStatus()&AliESDtrack::kITSin) continue;
51ad6848 309 if (esd->GetKinkIndex(0)>0) continue; //kink daughter
15dd636f 310 AliITStrackMI *t=0;
e43c066c 311 try {
15dd636f 312 t=new AliITStrackMI(*esd);
e43c066c 313 } catch (const Char_t *msg) {
628e7bb0 314 //Warning("Clusters2Tracks",msg);
e43c066c 315 delete t;
316 continue;
317 }
791f9a2a 318 //t->fD[0] = t->GetD(GetX(),GetY());
319 //t->fD[1] = t->GetZat(GetX())-GetZ();
b9671574 320 t->GetDZ(GetX(),GetY(),GetZ(),t->GetDP()); //I.B.
321 Double_t vdist = TMath::Sqrt(t->GetD(0)*t->GetD(0)+t->GetD(1)*t->GetD(1));
628e7bb0 322 if (t->GetMass()<0.13) t->SetMass(0.13957); // MI look to the esd - mass hypothesys !!!!!!!!!!!
e43c066c 323 // write expected q
b9671574 324 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
e43c066c 325
b9671574 326 if (esd->GetV0Index(0)>0 && t->GetD(0)<30){
81e97e0d 327 //track - can be V0 according to TPC
e43c066c 328 }
81e97e0d 329 else{
b9671574 330 if (TMath::Abs(t->GetD(0))>10) {
81e97e0d 331 delete t;
332 continue;
333 }
334
335 if (TMath::Abs(vdist)>20) {
336 delete t;
337 continue;
338 }
339 if (TMath::Abs(1/t->Get1Pt())<0.120) {
340 delete t;
341 continue;
342 }
343
344 if (CorrectForDeadZoneMaterial(t)!=0) {
345 //Warning("Clusters2Tracks",
346 // "failed to correct for the material in the dead zone !\n");
347 delete t;
348 continue;
349 }
e43c066c 350 }
b9671574 351 t->SetReconstructed(kFALSE);
e43c066c 352 itsTracks.AddLast(t);
628e7bb0 353 fOriginal.AddLast(t);
e43c066c 354 }
355 } /* End Read ESD tracks */
356
357 itsTracks.Sort();
628e7bb0 358 fOriginal.Sort();
e43c066c 359 Int_t nentr=itsTracks.GetEntriesFast();
360 fTrackHypothesys.Expand(nentr);
81e97e0d 361 fBestHypothesys.Expand(nentr);
e43c066c 362 MakeCoeficients(nentr);
363 Int_t ntrk=0;
364 for (fPass=0; fPass<2; fPass++) {
365 Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
366 for (Int_t i=0; i<nentr; i++) {
4c53440c 367// cerr<<fPass<<" "<<i<<'\r';
e43c066c 368 fCurrentEsdTrack = i;
15dd636f 369 AliITStrackMI *t=(AliITStrackMI*)itsTracks.UncheckedAt(i);
e43c066c 370 if (t==0) continue; //this track has been already tracked
b9671574 371 if (t->GetReconstructed()&&(t->GetNUsed()<1.5)) continue; //this track was already "succesfully" reconstructed
791f9a2a 372 //if ( (TMath::Abs(t->GetD(GetX(),GetY())) >3.) && fConstraint[fPass]) continue;
373 //if ( (TMath::Abs(t->GetZat(GetX())-GetZ())>3.) && fConstraint[fPass]) continue;
374 Float_t dz[2]; t->GetDZ(GetX(),GetY(),GetZ(),dz); //I.B.
375 if ( (TMath::Abs(dz[0])>3.) && fConstraint[fPass]) continue;
376 if ( (TMath::Abs(dz[1])>3.) && fConstraint[fPass]) continue;
e43c066c 377
378 Int_t tpcLabel=t->GetLabel(); //save the TPC track label
379 fI = 6;
380 ResetTrackToFollow(*t);
381 ResetBestTrack();
81e97e0d 382 FollowProlongationTree(t,i,fConstraint[fPass]);
e43c066c 383
384 SortTrackHypothesys(fCurrentEsdTrack,20,0); //MI change
385 //
15dd636f 386 AliITStrackMI * besttrack = GetBestHypothesys(fCurrentEsdTrack,t,15);
e43c066c 387 if (!besttrack) continue;
388 besttrack->SetLabel(tpcLabel);
389 // besttrack->CookdEdx();
390 CookdEdx(besttrack);
b9671574 391 besttrack->SetFakeRatio(1.);
e43c066c 392 CookLabel(besttrack,0.); //For comparison only
e43c066c 393 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
628e7bb0 394
395 /*
396 if ( besttrack->GetNumberOfClusters()<6 && fConstraint[fPass]) {
e43c066c 397 continue;
398 }
399 if (besttrack->fChi2MIP[0]+besttrack->fNUsed>3.5) continue;
400 if ( (TMath::Abs(besttrack->fD[0]*besttrack->fD[0]+besttrack->fD[1]*besttrack->fD[1])>0.1) && fConstraint[fPass]) continue;
401 //delete itsTracks.RemoveAt(i);
628e7bb0 402 */
403 if (fConstraint[fPass]&&(!besttrack->IsGoldPrimary())) continue; //to be tracked also without vertex constrain
404
405
b9671574 406 t->SetReconstructed(kTRUE);
e43c066c 407 ntrk++;
408 }
409 GetBestHypothesysMIP(itsTracks);
410 }
411
412 //GetBestHypothesysMIP(itsTracks);
81e97e0d 413 UpdateTPCV0(event);
414 FindV02(event);
628e7bb0 415 fAfterV0 = kTRUE;
416 //GetBestHypothesysMIP(itsTracks);
417 //
e43c066c 418 itsTracks.Delete();
419 //
420 Int_t entries = fTrackHypothesys.GetEntriesFast();
421 for (Int_t ientry=0;ientry<entries;ientry++){
422 TObjArray * array =(TObjArray*)fTrackHypothesys.UncheckedAt(ientry);
423 if (array) array->Delete();
424 delete fTrackHypothesys.RemoveAt(ientry);
425 }
426
427 fTrackHypothesys.Delete();
81e97e0d 428 fBestHypothesys.Delete();
628e7bb0 429 fOriginal.Clear();
430 delete []fCoeficients;
431 fCoeficients=0;
e43c066c 432 Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk);
628e7bb0 433
e43c066c 434 return 0;
435}
436
437
e43c066c 438Int_t AliITStrackerMI::PropagateBack(AliESD *event) {
439 //--------------------------------------------------------------------
440 // This functions propagates reconstructed ITS tracks back
441 // The clusters must be loaded !
442 //--------------------------------------------------------------------
443 Int_t nentr=event->GetNumberOfTracks();
444 Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
445
446 Int_t ntrk=0;
447 for (Int_t i=0; i<nentr; i++) {
448 AliESDtrack *esd=event->GetTrack(i);
449
450 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
451 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
452
15dd636f 453 AliITStrackMI *t=0;
e43c066c 454 try {
15dd636f 455 t=new AliITStrackMI(*esd);
e43c066c 456 } catch (const Char_t *msg) {
628e7bb0 457 //Warning("PropagateBack",msg);
e43c066c 458 delete t;
459 continue;
460 }
b9671574 461 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
e43c066c 462
463 ResetTrackToFollow(*t);
464
465 // propagete to vertex [SR, GSI 17.02.2003]
466 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
467 if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {
6c94f330 468 if (fTrackToFollow.PropagateToVertex(event->GetVertex())) {
e43c066c 469 fTrackToFollow.StartTimeIntegral();
470 }
471 fTrackToFollow.PropagateTo(3.,-0.0028,65.19);
472 }
473
6c94f330 474 fTrackToFollow.ResetCovariance(10.); fTrackToFollow.ResetClusters();
e43c066c 475 if (RefitAt(49.,&fTrackToFollow,t)) {
476 if (CorrectForDeadZoneMaterial(&fTrackToFollow)!=0) {
628e7bb0 477 //Warning("PropagateBack",
478 // "failed to correct for the material in the dead zone !\n");
e43c066c 479 delete t;
480 continue;
481 }
482 fTrackToFollow.SetLabel(t->GetLabel());
483 //fTrackToFollow.CookdEdx();
484 CookLabel(&fTrackToFollow,0.); //For comparison only
485 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
486 //UseClusters(&fTrackToFollow);
487 ntrk++;
488 }
489 delete t;
490 }
491
492 Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk);
493
494 return 0;
495}
496
497Int_t AliITStrackerMI::RefitInward(AliESD *event) {
498 //--------------------------------------------------------------------
499 // This functions refits ITS tracks using the
500 // "inward propagated" TPC tracks
501 // The clusters must be loaded !
502 //--------------------------------------------------------------------
67c1e979 503 RefitV02(event);
e43c066c 504 Int_t nentr=event->GetNumberOfTracks();
505 Info("RefitInward", "Number of ESD tracks: %d\n", nentr);
506
507 Int_t ntrk=0;
508 for (Int_t i=0; i<nentr; i++) {
509 AliESDtrack *esd=event->GetTrack(i);
510
511 if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
512 if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
513 if (esd->GetStatus()&AliESDtrack::kTPCout)
514 if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
515
15dd636f 516 AliITStrackMI *t=0;
e43c066c 517 try {
15dd636f 518 t=new AliITStrackMI(*esd);
e43c066c 519 } catch (const Char_t *msg) {
628e7bb0 520 //Warning("RefitInward",msg);
e43c066c 521 delete t;
522 continue;
523 }
b9671574 524 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
e43c066c 525 if (CorrectForDeadZoneMaterial(t)!=0) {
628e7bb0 526 //Warning("RefitInward",
527 // "failed to correct for the material in the dead zone !\n");
e43c066c 528 delete t;
529 continue;
530 }
531
532 ResetTrackToFollow(*t);
533 fTrackToFollow.ResetClusters();
534
535 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
6c94f330 536 fTrackToFollow.ResetCovariance(10.);
e43c066c 537
538 //Refitting...
ef7253ac 539 if (RefitAt(3.7, &fTrackToFollow, t,kTRUE)) {
e43c066c 540 fTrackToFollow.SetLabel(t->GetLabel());
541 // fTrackToFollow.CookdEdx();
542 CookdEdx(&fTrackToFollow);
543
544 CookLabel(&fTrackToFollow,0.0); //For comparison only
545
546 if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {//The beam pipe
49d13e89 547 AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack();
548 esdTrack->UpdateTrackParams(&fTrackToFollow,AliESDtrack::kITSrefit);
549 Float_t r[3]={0.,0.,0.};
550 Double_t maxD=3.;
551 esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD);
552 ntrk++;
e43c066c 553 }
554 }
555 delete t;
556 }
557
558 Info("RefitInward","Number of refitted tracks: %d\n",ntrk);
559
560 return 0;
561}
562
563AliCluster *AliITStrackerMI::GetCluster(Int_t index) const {
564 //--------------------------------------------------------------------
565 // Return pointer to a given cluster
566 //--------------------------------------------------------------------
567 Int_t l=(index & 0xf0000000) >> 28;
568 Int_t c=(index & 0x0fffffff) >> 00;
569 return fgLayers[l].GetCluster(c);
570}
571
4e65ff9e 572#include "TGeoManager.h"
573#include "TGeoMatrix.h"
574#include "TGeoPhysicalNode.h"
575
df29e9a4 576Bool_t AliITStrackerMI::GetTrackPoint(Int_t index, AliTrackPoint& p) const {
577 //
578 // Get track space point with index i
579 //
78b03929 580 Int_t l=(index & 0xf0000000) >> 28;
581 Int_t c=(index & 0x0fffffff) >> 00;
00a7cc50 582 AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
df29e9a4 583 Int_t idet = cl->GetDetectorIndex();
4e65ff9e 584
585 const char* name = AliAlignObj::SymName((AliAlignObj::ELayerID)
586 (l+AliAlignObj::kFirstLayer), idet);
587 TGeoPNEntry *mapPN = gGeoManager->GetAlignableEntry(name);
588
589 if (!mapPN) return kFALSE;
590 TGeoPhysicalNode *node = mapPN->GetPhysicalNode();
591 if (!node) {
592 gGeoManager->MakeAlignablePN(name);
593 node = mapPN->GetPhysicalNode();
594 }
595 if (!node) return kFALSE;
596 TGeoHMatrix* matrix = node->GetMatrix();
597 if (!matrix) return kFALSE;
598
599 //
600 // Calculate the global coordinates
601 //
602 Double_t localCoord[] = {cl->GetDetLocalX(), 0, cl->GetDetLocalZ()};
603 // LG AliAlignObj makes life simple but keep in mind that alignable
604 // LG volume doesn't mean sensitive volume. There might be a shift
605 // LG between the 2, has it is here for the SPD :
606 if (l<2) localCoord[1] = 0.01;
607 // LG !!! Check for this when the new geometry comes !!!
608 Double_t globalCoord[3] = {0};
609 matrix->LocalToMaster(localCoord, globalCoord);
610 Float_t xyz[3]= {globalCoord[0], globalCoord[1], globalCoord[2]};
611
612 //
613 // Calculate the cov matrix
614 //
615 TGeoRotation rotMatrix(*matrix);
616 TGeoRotation rotMatrixTr(rotMatrix.Inverse());
617 Double_t sigmaArray[] = {cl->GetSigmaY2(),0,0, 0,0,0, 0,0,cl->GetSigmaZ2()};
618 TGeoRotation sigmMatrix;
619 sigmMatrix.SetMatrix( sigmaArray );
620 sigmMatrix.MultiplyBy(&rotMatrixTr, kFALSE);
621 sigmMatrix.MultiplyBy(&rotMatrix, kTRUE);
622 const Double_t *globalSigma = sigmMatrix.GetRotationMatrix();
623 Float_t cov[6]= { globalSigma[0], globalSigma[1], globalSigma[2],
624 globalSigma[4], globalSigma[5],
625 globalSigma[8] };
626
28469fac 627 p.SetXYZ(xyz[0],xyz[1],xyz[2],cov);
df29e9a4 628 AliAlignObj::ELayerID iLayer = AliAlignObj::kInvalidLayer;
629 switch (l) {
630 case 0:
631 iLayer = AliAlignObj::kSPD1;
632 break;
633 case 1:
634 iLayer = AliAlignObj::kSPD2;
635 break;
636 case 2:
637 iLayer = AliAlignObj::kSDD1;
638 break;
639 case 3:
640 iLayer = AliAlignObj::kSDD2;
641 break;
642 case 4:
643 iLayer = AliAlignObj::kSSD1;
644 break;
645 case 5:
646 iLayer = AliAlignObj::kSSD2;
647 break;
648 default:
649 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
650 break;
651 };
652 UShort_t volid = AliAlignObj::LayerToVolUID(iLayer,idet);
653 p.SetVolumeID((UShort_t)volid);
654 return kTRUE;
655}
e43c066c 656
81e97e0d 657void AliITStrackerMI::FollowProlongationTree(AliITStrackMI * otrack, Int_t esdindex, Bool_t constrain)
e43c066c 658{
659 //--------------------------------------------------------------------
660 // Follow prolongation tree
661 //--------------------------------------------------------------------
81e97e0d 662 //
b9671574 663 AliESDtrack * esd = otrack->GetESDtrack();
81e97e0d 664 if (esd->GetV0Index(0)>0){
665 //
666 // TEMPORARY SOLLUTION: map V0 indexes to point to proper track
667 // mapping of esd track is different as its track in Containers
668 // Need something more stable
669 // Indexes are set back againg to the ESD track indexes in UpdateTPCV0
670 for (Int_t i=0;i<3;i++){
671 Int_t index = esd->GetV0Index(i);
672 if (index==0) break;
d6a49f20 673 AliESDv0 * vertex = fEsd->GetV0(index);
81e97e0d 674 if (vertex->GetStatus()<0) continue; // rejected V0
675 //
b75d63a7 676 if (esd->GetSign()>0) {
677 vertex->SetIndex(0,esdindex);
678 }
679 else{
680 vertex->SetIndex(1,esdindex);
681 }
81e97e0d 682 }
683 }
684 TObjArray *bestarray = (TObjArray*)fBestHypothesys.At(esdindex);
685 if (!bestarray){
686 bestarray = new TObjArray(5);
687 fBestHypothesys.AddAt(bestarray,esdindex);
688 }
e43c066c 689
81e97e0d 690 //
e43c066c 691 //setup tree of the prolongations
692 //
15dd636f 693 static AliITStrackMI tracks[7][100];
694 AliITStrackMI *currenttrack;
695 static AliITStrackMI currenttrack1;
696 static AliITStrackMI currenttrack2;
697 static AliITStrackMI backuptrack;
e43c066c 698 Int_t ntracks[7];
699 Int_t nindexes[7][100];
700 Float_t normalizedchi2[100];
701 for (Int_t ilayer=0;ilayer<6;ilayer++) ntracks[ilayer]=0;
b9671574 702 otrack->SetNSkipped(0);
15dd636f 703 new (&(tracks[6][0])) AliITStrackMI(*otrack);
e43c066c 704 ntracks[6]=1;
81e97e0d 705 for (Int_t i=0;i<7;i++) nindexes[i][0]=0;
e43c066c 706 //
707 //
708 // follow prolongations
709 for (Int_t ilayer=5;ilayer>=0;ilayer--){
710 //
711 AliITSlayer &layer=fgLayers[ilayer];
712 Double_t r=layer.GetR();
713 ntracks[ilayer]=0;
714 //
715 //
716 Int_t nskipped=0;
717 Float_t nused =0;
718 for (Int_t itrack =0;itrack<ntracks[ilayer+1];itrack++){
719 //set current track
720 if (ntracks[ilayer]>=100) break;
b9671574 721 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0) nskipped++;
722 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2.) nused++;
e43c066c 723 if (ntracks[ilayer]>15+ilayer){
b9671574 724 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0 && nskipped>4+ilayer) continue;
725 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2. && nused>3) continue;
e43c066c 726 }
727
15dd636f 728 new(&currenttrack1) AliITStrackMI(tracks[ilayer+1][nindexes[ilayer+1][itrack]]);
e43c066c 729 if (ilayer==3 || ilayer==1) {
730 Double_t rs=0.5*(fgLayers[ilayer+1].GetR() + r);
731 Double_t d=0.0034, x0=38.6;
732 if (ilayer==1) {rs=9.; d=0.0097; x0=42;}
733 if (!currenttrack1.PropagateTo(rs,d,x0)) {
734 continue;
735 }
736 }
737 //
738 //find intersection with layer
739 Double_t x,y,z;
740 if (!currenttrack1.GetGlobalXYZat(r,x,y,z)) {
741 continue;
742 }
743 Double_t phi=TMath::ATan2(y,x);
744 Int_t idet=layer.FindDetectorIndex(phi,z);
745 if (idet<0) {
746 continue;
747 }
748 //propagate to the intersection
749 const AliITSdetector &det=layer.GetDetector(idet);
750 phi=det.GetPhi();
15dd636f 751 new(&currenttrack2) AliITStrackMI(currenttrack1);
e43c066c 752 if (!currenttrack1.Propagate(phi,det.GetR())) {
753 continue;
754 }
755 currenttrack2.Propagate(phi,det.GetR()); //
756 currenttrack1.SetDetectorIndex(idet);
757 currenttrack2.SetDetectorIndex(idet);
758
759 //
760 //
761 Double_t dz=7.5*TMath::Sqrt(currenttrack1.GetSigmaZ2() + 16.*kSigmaZ2[ilayer]);
762 Double_t dy=7.5*TMath::Sqrt(currenttrack1.GetSigmaY2() + 16.*kSigmaY2[ilayer]);
763 //
764 Bool_t isBoundary=kFALSE;
765 if (currenttrack1.GetY()-dy< det.GetYmin()+0.2) isBoundary = kTRUE;
766 if (currenttrack1.GetY()+dy> det.GetYmax()-0.2) isBoundary = kTRUE;
767 if (currenttrack1.GetZ()-dz< det.GetZmin()+0.2) isBoundary = kTRUE;
768 if (currenttrack1.GetZ()+dz> det.GetZmax()-0.2) isBoundary = kTRUE;
769
770 if (isBoundary){ // track at boundary between detectors
771 Float_t maxtgl = TMath::Abs(currenttrack1.GetTgl());
772 if (maxtgl>1) maxtgl=1;
773 dz = TMath::Sqrt(dz*dz+0.25*maxtgl*maxtgl);
774 //
775 Float_t maxsnp = TMath::Abs(currenttrack1.GetSnp());
776 if (maxsnp>0.95) continue;
777 //if (maxsnp>0.5) maxsnp=0.5;
778 dy=TMath::Sqrt(dy*dy+0.25*maxsnp*maxsnp);
779 }
780
781 Double_t zmin=currenttrack1.GetZ() - dz;
782 Double_t zmax=currenttrack1.GetZ() + dz;
783 Double_t ymin=currenttrack1.GetY() + r*phi - dy;
784 Double_t ymax=currenttrack1.GetY() + r*phi + dy;
785 layer.SelectClusters(zmin,zmax,ymin,ymax);
786 //
787 // loop over all possible prolongations
788 //
789 Double_t msz=1./((currenttrack1.GetSigmaZ2() + 16.*kSigmaZ2[ilayer]));
790 Double_t msy=1./((currenttrack1.GetSigmaY2() + 16.*kSigmaY2[ilayer]));
81e97e0d 791 if (constrain){
e43c066c 792 msy/=60; msz/=60.;
793 }
794 else{
795 msy/=50; msz/=50.;
796 }
797 //
00a7cc50 798 const AliITSRecPoint *c=0; Int_t ci=-1;
e43c066c 799 Double_t chi2=12345.;
800 Int_t deadzone=0;
801 currenttrack = &currenttrack1;
802 while ((c=layer.GetNextCluster(ci))!=0) {
803 if (ntracks[ilayer]>95) break; //space for skipped clusters
804 Bool_t change =kFALSE;
805 if (c->GetQ()==0 && (deadzone==1)) continue;
806 Int_t idet=c->GetDetectorIndex();
807 if (currenttrack->GetDetectorIndex()!=idet) {
808 const AliITSdetector &det=layer.GetDetector(idet);
809 Double_t y,z;
810 if (!currenttrack2.GetProlongationFast(det.GetPhi(),det.GetR(),y,z)) continue;
811 Float_t pz = (z - c->GetZ()) , py=(y - c->GetY());
812 if (pz*pz*msz+py*py*msy>1.) continue;
813 //
15dd636f 814 new (&backuptrack) AliITStrackMI(currenttrack2);
e43c066c 815 change = kTRUE;
816 currenttrack =&currenttrack2;
817 if (!currenttrack->Propagate(det.GetPhi(),det.GetR())) {
15dd636f 818 new (currenttrack) AliITStrackMI(backuptrack);
e43c066c 819 change = kFALSE;
820 continue;
821 }
822 currenttrack->SetDetectorIndex(idet);
823 }
824 else{
825 Float_t pz = (currenttrack->GetZ() - c->GetZ()) , py=(currenttrack->GetY() - c->GetY());
826 if (pz*pz*msz+py*py*msy>1.) continue;
827 }
828
829 chi2=GetPredictedChi2MI(currenttrack,c,ilayer);
830 if (chi2<kMaxChi2s[ilayer]){
831 if (c->GetQ()==0) deadzone=1; // take dead zone only once
832 if (ntracks[ilayer]>=100) continue;
15dd636f 833 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
b9671574 834 updatetrack->SetClIndex(ilayer,0);
e43c066c 835 if (change){
15dd636f 836 new (&currenttrack2) AliITStrackMI(backuptrack);
e43c066c 837 }
838 if (c->GetQ()!=0){
839 if (!UpdateMI(updatetrack,c,chi2,(ilayer<<28)+ci)) continue;
840 updatetrack->SetSampledEdx(c->GetQ(),updatetrack->GetNumberOfClusters()-1); //b.b.
841 }
842 else {
b9671574 843 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
844 updatetrack->SetDeadZoneProbability(GetDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
e43c066c 845 }
846 if (c->IsUsed()){
b9671574 847 updatetrack->IncrementNUsed();
e43c066c 848 }
849 Double_t x0;
850 Double_t d=layer.GetThickness(updatetrack->GetY(),updatetrack->GetZ(),x0);
851 updatetrack->CorrectForMaterial(d,x0);
81e97e0d 852 if (constrain) {
b9671574 853 updatetrack->SetConstrain(constrain);
e43c066c 854 fI = ilayer;
855 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
856 Double_t xyz[]={GetX(),GetY(),GetZ()};
857 Double_t ptfactor = 1;
858 Double_t ers[]={GetSigmaX()*ptfactor,GetSigmaY()*ptfactor,GetSigmaZ()};
859 Bool_t isPrim = kTRUE;
860 if (ilayer<4){
791f9a2a 861 //updatetrack->fD[0] = updatetrack->GetD(GetX(),GetY());
862 //updatetrack->fD[1] = updatetrack->GetZat(GetX())-GetZ();
b9671574 863 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
864 if ( TMath::Abs(updatetrack->GetD(0)/(1.+ilayer))>0.4 || TMath::Abs(updatetrack->GetD(1)/(1.+ilayer))>0.4) isPrim=kFALSE;
e43c066c 865 }
866 if (isPrim) updatetrack->Improve(d,xyz,ers);
867 } //apply vertex constrain
868 ntracks[ilayer]++;
869 } // create new hypothesy
870 } // loop over possible cluster prolongation
81e97e0d 871 // if (constrain&&itrack<2&&currenttrack1.fNSkipped==0 && deadzone==0){
b9671574 872 if (constrain&&itrack<2&&currenttrack1.GetNSkipped()==0 && deadzone==0&&ntracks[ilayer]<100){
15dd636f 873 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
b9671574 874 vtrack->SetClIndex(ilayer,0);
e43c066c 875 fI = ilayer;
876 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
877 Double_t xyz[]={GetX(),GetY(),GetZ()};
878 Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
879 vtrack->Improve(d,xyz,ers);
b9671574 880 vtrack->IncrementNSkipped();
e43c066c 881 ntracks[ilayer]++;
882 }
628e7bb0 883
6c94f330 884 if (constrain&&itrack<1&&TMath::Abs(currenttrack1.GetTgl())>1.1){ //big theta -- for low mult. runs
628e7bb0 885 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
b9671574 886 vtrack->SetClIndex(ilayer,0);
628e7bb0 887 fI = ilayer;
888 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
889 Double_t xyz[]={GetX(),GetY(),GetZ()};
890 Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
891 vtrack->Improve(d,xyz,ers);
b9671574 892 vtrack->SetNDeadZone(vtrack->GetNDeadZone()+1);
628e7bb0 893 ntracks[ilayer]++;
894 }
895
e43c066c 896
897 } //loop over track candidates
898 //
899 //
900 Int_t accepted=0;
901
902 Int_t golds=0;
903 for (Int_t itrack=0;itrack<ntracks[ilayer];itrack++){
904 normalizedchi2[itrack] = NormalizedChi2(&tracks[ilayer][itrack],ilayer);
905 if ( normalizedchi2[itrack]<3+0.5*ilayer) golds++;
906 if (ilayer>4) accepted++;
907 else{
81e97e0d 908 if ( constrain && normalizedchi2[itrack]<kMaxNormChi2C[ilayer]+1) accepted++;
909 if (!constrain && normalizedchi2[itrack]<kMaxNormChi2NonC[ilayer]+1) accepted++;
e43c066c 910 }
911 }
912 TMath::Sort(ntracks[ilayer],normalizedchi2,nindexes[ilayer],kFALSE);
913 ntracks[ilayer] = TMath::Min(accepted,7+2*ilayer);
914 if (ntracks[ilayer]<golds+2+ilayer) ntracks[ilayer]=TMath::Min(golds+2+ilayer,accepted);
915 if (ntracks[ilayer]>90) ntracks[ilayer]=90;
916 } //loop over layers
917 //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]);
81e97e0d 918 Int_t max = constrain? 20: 5;
e43c066c 919
628e7bb0 920 for (Int_t i=0;i<TMath::Min(max,ntracks[0]);i++) {
15dd636f 921 AliITStrackMI & track= tracks[0][nindexes[0][i]];
628e7bb0 922 if (track.GetNumberOfClusters()<2) continue;
b9671574 923 if (!constrain&&track.GetNormChi2(0)>7.)continue;
15dd636f 924 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
e43c066c 925 }
628e7bb0 926 for (Int_t i=0;i<TMath::Min(2,ntracks[1]);i++) {
15dd636f 927 AliITStrackMI & track= tracks[1][nindexes[1][i]];
e43c066c 928 if (track.GetNumberOfClusters()<4) continue;
b9671574 929 if (!constrain&&track.GetNormChi2(1)>7.)continue;
930 if (constrain) track.IncrementNSkipped();
81e97e0d 931 if (!constrain) {
b9671574 932 track.SetD(0,track.GetD(GetX(),GetY()));
933 track.SetNSkipped(track.GetNSkipped()+4./(4.+8.*TMath::Abs(track.GetD(0))));
934 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
935 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
e43c066c 936 }
937 }
15dd636f 938 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
e43c066c 939 }
940 //}
941
81e97e0d 942 if (!constrain){
628e7bb0 943 for (Int_t i=0;i<TMath::Min(2,ntracks[2]);i++) {
15dd636f 944 AliITStrackMI & track= tracks[2][nindexes[2][i]];
628e7bb0 945 if (track.GetNumberOfClusters()<3) continue;
b9671574 946 if (!constrain&&track.GetNormChi2(2)>7.)continue;
947 if (constrain) track.SetNSkipped(track.GetNSkipped()+2);
81e97e0d 948 if (!constrain){
b9671574 949 track.SetD(0,track.GetD(GetX(),GetY()));
950 track.SetNSkipped(track.GetNSkipped()+7./(7.+8.*TMath::Abs(track.GetD(0))));
951 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
952 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
e43c066c 953 }
954 }
15dd636f 955 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
e43c066c 956 }
957 }
81e97e0d 958
959 if (!constrain){
960 //
961 // register best tracks - important for V0 finder
962 //
963 for (Int_t ilayer=0;ilayer<5;ilayer++){
964 if (ntracks[ilayer]==0) continue;
965 AliITStrackMI & track= tracks[ilayer][nindexes[ilayer][0]];
966 if (track.GetNumberOfClusters()<1) continue;
967 CookLabel(&track,0);
968 bestarray->AddAt(new AliITStrackMI(track),ilayer);
969 }
970 }
971 //
972 // update TPC V0 information
973 //
b9671574 974 if (otrack->GetESDtrack()->GetV0Index(0)>0){
81e97e0d 975 Float_t fprimvertex[3]={GetX(),GetY(),GetZ()};
976 for (Int_t i=0;i<3;i++){
b9671574 977 Int_t index = otrack->GetESDtrack()->GetV0Index(i);
81e97e0d 978 if (index==0) break;
d6a49f20 979 AliV0 * vertex = (AliV0*)fEsd->GetV0(index);
81e97e0d 980 if (vertex->GetStatus()<0) continue; // rejected V0
981 //
6c94f330 982 if (otrack->GetSign()>0) {
81e97e0d 983 vertex->SetIndex(0,esdindex);
984 }
985 else{
986 vertex->SetIndex(1,esdindex);
987 }
988 //find nearest layer with track info
b75d63a7 989 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
990 Int_t nearestold = GetNearestLayer(xrp); //I.B.
81e97e0d 991 Int_t nearest = nearestold;
992 for (Int_t ilayer =nearest;ilayer<8;ilayer++){
993 if (ntracks[nearest]==0){
994 nearest = ilayer;
995 }
996 }
997 //
998 AliITStrackMI & track= tracks[nearest][nindexes[nearest][0]];
999 if (nearestold<5&&nearest<5){
b9671574 1000 Bool_t accept = track.GetNormChi2(nearest)<10;
81e97e0d 1001 if (accept){
6c94f330 1002 if (track.GetSign()>0) {
b75d63a7 1003 vertex->SetParamP(track);
81e97e0d 1004 vertex->Update(fprimvertex);
1005 // vertex->SetIndex(0,track.fESDtrack->GetID());
1006 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1007 }else{
b75d63a7 1008 vertex->SetParamN(track);
81e97e0d 1009 vertex->Update(fprimvertex);
1010 //vertex->SetIndex(1,track.fESDtrack->GetID());
1011 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1012 }
1013 vertex->SetStatus(vertex->GetStatus()+1);
1014 }else{
1015 // vertex->SetStatus(-2); // reject V0 - not enough clusters
1016 }
1017 }
1018 // if (nearestold>3){
1019// Int_t indexlayer = (ntracks[0]>0)? 0:1;
1020// if (ntracks[indexlayer]>0){
1021// AliITStrackMI & track= tracks[indexlayer][nindexes[indexlayer][0]];
1022// if (track.GetNumberOfClusters()>4&&track.fNormChi2[indexlayer]<4){
1023// vertex->SetStatus(-1); // reject V0 - clusters before
1024// }
1025// }
1026// }
1027 }
1028 }
e43c066c 1029}
1030
1031
1032AliITStrackerMI::AliITSlayer & AliITStrackerMI::GetLayer(Int_t layer) const
1033{
1034 //--------------------------------------------------------------------
1035 //
1036 //
1037 return fgLayers[layer];
1038}
8221b41b 1039
1040AliITStrackerMI::AliITSlayer::AliITSlayer():
1041fR(0),
1042fPhiOffset(0),
1043fNladders(0),
1044fZOffset(0),
1045fNdetectors(0),
1046fDetectors(0),
1047fN(0),
1048fDy5(0),
1049fDy10(0),
1050fDy20(0),
1051fClustersCs(0),
1052fClusterIndexCs(0),
1053fYcs(0),
1054fZcs(0),
1055fNcs(0),
1056fCurrentSlice(-1),
1057fZmax(0),
1058fYmin(0),
1059fYmax(0),
1060fI(0),
1061fImax(0),
1062fSkip(0),
1063fAccepted(0),
1064fRoad(0){
e43c066c 1065 //--------------------------------------------------------------------
1066 //default AliITSlayer constructor
1067 //--------------------------------------------------------------------
e43c066c 1068 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
1069 fClusterWeight[i]=0;
1070 fClusterTracks[0][i]=-1;
1071 fClusterTracks[1][i]=-1;
1072 fClusterTracks[2][i]=-1;
1073 fClusterTracks[3][i]=-1;
1074 }
1075}
1076
1077AliITStrackerMI::AliITSlayer::
8221b41b 1078AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd):
1079fR(r),
1080fPhiOffset(p),
1081fNladders(nl),
1082fZOffset(z),
1083fNdetectors(nd),
1084fDetectors(0),
1085fN(0),
1086fDy5(0),
1087fDy10(0),
1088fDy20(0),
1089fClustersCs(0),
1090fClusterIndexCs(0),
1091fYcs(0),
1092fZcs(0),
1093fNcs(0),
1094fCurrentSlice(-1),
1095fZmax(0),
1096fYmin(0),
1097fYmax(0),
1098fI(0),
1099fImax(0),
1100fSkip(0),
1101fAccepted(0),
1102fRoad(0) {
e43c066c 1103 //--------------------------------------------------------------------
1104 //main AliITSlayer constructor
1105 //--------------------------------------------------------------------
e43c066c 1106 fDetectors=new AliITSdetector[fNladders*fNdetectors];
e43c066c 1107 fRoad=2*fR*TMath::Sqrt(3.14/1.);//assuming that there's only one cluster
1108}
1109
8221b41b 1110AliITStrackerMI::AliITSlayer::AliITSlayer(const AliITSlayer& layer):
1111fR(layer.fR),
1112fPhiOffset(layer.fPhiOffset),
1113fNladders(layer.fNladders),
1114fZOffset(layer.fZOffset),
1115fNdetectors(layer.fNdetectors),
1116fDetectors(layer.fDetectors),
1117fN(layer.fN),
1118fDy5(layer.fDy5),
1119fDy10(layer.fDy10),
1120fDy20(layer.fDy20),
1121fClustersCs(layer.fClustersCs),
1122fClusterIndexCs(layer.fClusterIndexCs),
1123fYcs(layer.fYcs),
1124fZcs(layer.fZcs),
1125fNcs(layer.fNcs),
1126fCurrentSlice(layer.fCurrentSlice),
1127fZmax(layer.fZmax),
1128fYmin(layer.fYmin),
1129fYmax(layer.fYmax),
1130fI(layer.fI),
1131fImax(layer.fImax),
1132fSkip(layer.fSkip),
1133fAccepted(layer.fAccepted),
1134fRoad(layer.fRoad){
1135 //Copy constructor
1136}
1137
1138
e43c066c 1139AliITStrackerMI::AliITSlayer::~AliITSlayer() {
1140 //--------------------------------------------------------------------
1141 // AliITSlayer destructor
1142 //--------------------------------------------------------------------
1143 delete[] fDetectors;
1144 for (Int_t i=0; i<fN; i++) delete fClusters[i];
1145 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
1146 fClusterWeight[i]=0;
1147 fClusterTracks[0][i]=-1;
1148 fClusterTracks[1][i]=-1;
1149 fClusterTracks[2][i]=-1;
1150 fClusterTracks[3][i]=-1;
1151 }
1152}
1153
1154void AliITStrackerMI::AliITSlayer::ResetClusters() {
1155 //--------------------------------------------------------------------
1156 // This function removes loaded clusters
1157 //--------------------------------------------------------------------
1158 for (Int_t i=0; i<fN; i++) delete fClusters[i];
1159 for (Int_t i=0; i<kMaxClusterPerLayer;i++){
1160 fClusterWeight[i]=0;
1161 fClusterTracks[0][i]=-1;
1162 fClusterTracks[1][i]=-1;
1163 fClusterTracks[2][i]=-1;
1164 fClusterTracks[3][i]=-1;
1165 }
1166
1167 fN=0;
1168 fI=0;
1169}
1170
1171void AliITStrackerMI::AliITSlayer::ResetWeights() {
1172 //--------------------------------------------------------------------
1173 // This function reset weights of the clusters
1174 //--------------------------------------------------------------------
1175 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
1176 fClusterWeight[i]=0;
1177 fClusterTracks[0][i]=-1;
1178 fClusterTracks[1][i]=-1;
1179 fClusterTracks[2][i]=-1;
1180 fClusterTracks[3][i]=-1;
1181 }
1182 for (Int_t i=0; i<fN;i++) {
00a7cc50 1183 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster(i);
e43c066c 1184 if (cl&&cl->IsUsed()) cl->Use();
1185 }
1186
1187}
1188
1189void AliITStrackerMI::AliITSlayer::ResetRoad() {
1190 //--------------------------------------------------------------------
1191 // This function calculates the road defined by the cluster density
1192 //--------------------------------------------------------------------
1193 Int_t n=0;
1194 for (Int_t i=0; i<fN; i++) {
1195 if (TMath::Abs(fClusters[i]->GetZ())<fR) n++;
1196 }
1197 //if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n);
1198 if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n);
1199}
1200
628e7bb0 1201
00a7cc50 1202Int_t AliITStrackerMI::AliITSlayer::InsertCluster(AliITSRecPoint *c) {
e43c066c 1203 //--------------------------------------------------------------------
1204 //This function adds a cluster to this layer
1205 //--------------------------------------------------------------------
1206 if (fN==kMaxClusterPerLayer) {
1207 ::Error("InsertCluster","Too many clusters !\n");
1208 return 1;
1209 }
1210 fCurrentSlice=-1;
1d4090b7 1211 fClusters[fN]=c;
1212 fN++;
e43c066c 1213 AliITSdetector &det=GetDetector(c->GetDetectorIndex());
e43c066c 1214 if (c->GetY()<det.GetYmin()) det.SetYmin(c->GetY());
1215 if (c->GetY()>det.GetYmax()) det.SetYmax(c->GetY());
1216 if (c->GetZ()<det.GetZmin()) det.SetZmin(c->GetZ());
1217 if (c->GetZ()>det.GetZmax()) det.SetZmax(c->GetZ());
1218
1219 return 0;
1220}
1221
1222void AliITStrackerMI::AliITSlayer::SortClusters()
1223{
1224 //
1225 //sort clusters
1226 //
00a7cc50 1227 AliITSRecPoint **clusters = new AliITSRecPoint*[fN];
1d4090b7 1228 Float_t *z = new Float_t[fN];
1229 Int_t * index = new Int_t[fN];
1230 //
1231 for (Int_t i=0;i<fN;i++){
1232 z[i] = fClusters[i]->GetZ();
1233 }
1234 TMath::Sort(fN,z,index,kFALSE);
1235 for (Int_t i=0;i<fN;i++){
1236 clusters[i] = fClusters[index[i]];
1237 }
1238 //
1239 for (Int_t i=0;i<fN;i++){
1240 fClusters[i] = clusters[i];
1241 fZ[i] = fClusters[i]->GetZ();
1242 AliITSdetector &det=GetDetector(fClusters[i]->GetDetectorIndex());
1243 Double_t y=fR*det.GetPhi() + fClusters[i]->GetY();
1244 if (y>2.*fR*TMath::Pi()) y -= 2.*fR*TMath::Pi();
1245 fY[i] = y;
1246 }
1247 delete[] index;
1248 delete[] z;
1249 delete[] clusters;
1250 //
1251
e43c066c 1252 fYB[0]=10000000;
1253 fYB[1]=-10000000;
1254 for (Int_t i=0;i<fN;i++){
1255 if (fY[i]<fYB[0]) fYB[0]=fY[i];
1256 if (fY[i]>fYB[1]) fYB[1]=fY[i];
1257 fClusterIndex[i] = i;
1258 }
1259 //
1260 // fill slices
1261 fDy5 = (fYB[1]-fYB[0])/5.;
1262 fDy10 = (fYB[1]-fYB[0])/10.;
1263 fDy20 = (fYB[1]-fYB[0])/20.;
1264 for (Int_t i=0;i<6;i++) fN5[i] =0;
1265 for (Int_t i=0;i<11;i++) fN10[i]=0;
1266 for (Int_t i=0;i<21;i++) fN20[i]=0;
1267 //
1268 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;}
1269 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;}
1270 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;}
1271 //
1272 //
1d4090b7 1273 for (Int_t i=0;i<fN;i++)
1274 for (Int_t irot=-1;irot<=1;irot++){
1275 Float_t curY = fY[i]+irot*TMath::TwoPi()*fR;
1276 // slice 5
1277 for (Int_t slice=0; slice<6;slice++){
1278 if (fBy5[slice][0]<curY && curY<fBy5[slice][1]&&fN5[slice]<kMaxClusterPerLayer5){
1279 fClusters5[slice][fN5[slice]] = fClusters[i];
1280 fY5[slice][fN5[slice]] = curY;
1281 fZ5[slice][fN5[slice]] = fZ[i];
1282 fClusterIndex5[slice][fN5[slice]]=i;
1283 fN5[slice]++;
1284 }
e43c066c 1285 }
1d4090b7 1286 // slice 10
1287 for (Int_t slice=0; slice<11;slice++){
1288 if (fBy10[slice][0]<curY && curY<fBy10[slice][1]&&fN10[slice]<kMaxClusterPerLayer10){
1289 fClusters10[slice][fN10[slice]] = fClusters[i];
1290 fY10[slice][fN10[slice]] = curY;
1291 fZ10[slice][fN10[slice]] = fZ[i];
1292 fClusterIndex10[slice][fN10[slice]]=i;
1293 fN10[slice]++;
1294 }
e43c066c 1295 }
1d4090b7 1296 // slice 20
1297 for (Int_t slice=0; slice<21;slice++){
1298 if (fBy20[slice][0]<curY && curY<fBy20[slice][1]&&fN20[slice]<kMaxClusterPerLayer20){
1299 fClusters20[slice][fN20[slice]] = fClusters[i];
1300 fY20[slice][fN20[slice]] = curY;
1301 fZ20[slice][fN20[slice]] = fZ[i];
1302 fClusterIndex20[slice][fN20[slice]]=i;
1303 fN20[slice]++;
1304 }
1305 }
e43c066c 1306 }
1d4090b7 1307
1308 //
1309 // consistency check
1310 //
1311 for (Int_t i=0;i<fN-1;i++){
1312 if (fZ[i]>fZ[i+1]){
1313 printf("Bugg\n");
e43c066c 1314 }
1315 }
1d4090b7 1316 //
1317 for (Int_t slice=0;slice<21;slice++)
1318 for (Int_t i=0;i<fN20[slice]-1;i++){
1319 if (fZ20[slice][i]>fZ20[slice][i+1]){
1320 printf("Bugg\n");
1321 }
1322 }
1323
1324
e43c066c 1325}
1326
1327
e43c066c 1328Int_t AliITStrackerMI::AliITSlayer::FindClusterIndex(Float_t z) const {
1329 //--------------------------------------------------------------------
1330 // This function returns the index of the nearest cluster
1331 //--------------------------------------------------------------------
1332 Int_t ncl=0;
1333 const Float_t *zcl;
1334 if (fCurrentSlice<0) {
1335 ncl = fN;
1336 zcl = fZ;
1337 }
1338 else{
1339 ncl = fNcs;
1340 zcl = fZcs;;
1341 }
1342
1343 if (ncl==0) return 0;
1344 Int_t b=0, e=ncl-1, m=(b+e)/2;
1345 for (; b<e; m=(b+e)/2) {
1346 // if (z > fClusters[m]->GetZ()) b=m+1;
1347 if (z > zcl[m]) b=m+1;
1348 else e=m;
1349 }
1350 return m;
1351}
e43c066c 1352
1353
1354void AliITStrackerMI::AliITSlayer::
1355SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1356 //--------------------------------------------------------------------
1357 // This function sets the "window"
1358 //--------------------------------------------------------------------
1359
628e7bb0 1360 Double_t circle=2*TMath::Pi()*fR;
e43c066c 1361 fYmin = ymin; fYmax =ymax;
1362 Float_t ymiddle = (fYmin+fYmax)*0.5;
1363 if (ymiddle<fYB[0]) {fYmin+=circle; fYmax+=circle;ymiddle+=circle;}
1364 else{
1365 if (ymiddle>fYB[1]) {fYmin-=circle; fYmax-=circle;ymiddle-=circle;}
1366 }
1367 //
1368 fCurrentSlice =-1;
1369 // defualt take all
1370 fClustersCs = fClusters;
1371 fClusterIndexCs = fClusterIndex;
1372 fYcs = fY;
1373 fZcs = fZ;
1374 fNcs = fN;
628e7bb0 1375 //
e43c066c 1376 //is in 20 slice?
1377 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy20){
1378 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy20);
1379 if (slice<0) slice=0;
1380 if (slice>20) slice=20;
1381 Bool_t isOK = (fYmin>fBy20[slice][0]&&fYmax<fBy20[slice][1]);
1382 if (isOK) {
1383 fCurrentSlice=slice;
1384 fClustersCs = fClusters20[fCurrentSlice];
1385 fClusterIndexCs = fClusterIndex20[fCurrentSlice];
1386 fYcs = fY20[fCurrentSlice];
1387 fZcs = fZ20[fCurrentSlice];
1388 fNcs = fN20[fCurrentSlice];
1389 }
1390 }
1391 //
1392 //is in 10 slice?
1393 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy10){
1394 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy10);
1395 if (slice<0) slice=0;
1396 if (slice>10) slice=10;
1397 Bool_t isOK = (fYmin>fBy10[slice][0]&&fYmax<fBy10[slice][1]);
1398 if (isOK) {
1399 fCurrentSlice=slice;
1400 fClustersCs = fClusters10[fCurrentSlice];
1401 fClusterIndexCs = fClusterIndex10[fCurrentSlice];
1402 fYcs = fY10[fCurrentSlice];
1403 fZcs = fZ10[fCurrentSlice];
1404 fNcs = fN10[fCurrentSlice];
1405 }
1406 }
1407 //
1408 //is in 5 slice?
1409 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy5){
1410 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy5);
1411 if (slice<0) slice=0;
1412 if (slice>5) slice=5;
1413 Bool_t isOK = (fYmin>fBy5[slice][0]&&fYmax<fBy5[slice][1]);
1414 if ( isOK){
1415 fCurrentSlice=slice;
1416 fClustersCs = fClusters5[fCurrentSlice];
1417 fClusterIndexCs = fClusterIndex5[fCurrentSlice];
1418 fYcs = fY5[fCurrentSlice];
1419 fZcs = fZ5[fCurrentSlice];
1420 fNcs = fN5[fCurrentSlice];
1421 }
1422 }
628e7bb0 1423 //
e43c066c 1424 fI=FindClusterIndex(zmin); fZmax=zmax;
1425 fImax = TMath::Min(FindClusterIndex(zmax)+1,fNcs);
1426 fSkip = 0;
1427 fAccepted =0;
1428}
1429
e43c066c 1430
628e7bb0 1431
1432
1433Int_t AliITStrackerMI::AliITSlayer::
1434FindDetectorIndex(Double_t phi, Double_t z) const {
1435 //--------------------------------------------------------------------
1436 //This function finds the detector crossed by the track
1437 //--------------------------------------------------------------------
1438 Double_t dphi=-(phi-fPhiOffset);
1439 if (dphi < 0) dphi += 2*TMath::Pi();
1440 else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi();
1441 Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5);
1442 if (np>=fNladders) np-=fNladders;
1443 if (np<0) np+=fNladders;
1444
1445 Double_t dz=fZOffset-z;
1446 Int_t nz=Int_t(dz*(fNdetectors-1)*0.5/fZOffset+0.5);
1447 if (nz>=fNdetectors) return -1;
1448 if (nz<0) return -1;
1449
1450 return np*fNdetectors + nz;
1451}
1452
1453
00a7cc50 1454const AliITSRecPoint *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci){
e43c066c 1455 //--------------------------------------------------------------------
1456 // This function returns clusters within the "window"
1457 //--------------------------------------------------------------------
1458
1459 if (fCurrentSlice<0){
1460 Double_t rpi2 = 2.*fR*TMath::Pi();
1461 for (Int_t i=fI; i<fImax; i++) {
1462 Double_t y = fY[i];
1463 if (fYmax<y) y -= rpi2;
1d4090b7 1464 if (fYmin>y) y += rpi2;
e43c066c 1465 if (y<fYmin) continue;
1466 if (y>fYmax) continue;
1467 if (fClusters[i]->GetQ()==0&&fSkip==2) continue;
1468 ci=i;
1469 fI=i+1;
1470 return fClusters[i];
1471 }
1472 }
1473 else{
1474 for (Int_t i=fI; i<fImax; i++) {
1475 if (fYcs[i]<fYmin) continue;
1476 if (fYcs[i]>fYmax) continue;
1477 if (fClustersCs[i]->GetQ()==0&&fSkip==2) continue;
1478 ci=fClusterIndexCs[i];
1479 fI=i+1;
1480 return fClustersCs[i];
1481 }
1482 }
1483 return 0;
1484}
1485
1486
1487
e43c066c 1488Double_t AliITStrackerMI::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0)
1489const {
1490 //--------------------------------------------------------------------
1491 //This function returns the layer thickness at this point (units X0)
1492 //--------------------------------------------------------------------
1493 Double_t d=0.0085;
1494 x0=21.82;
1495 if (43<fR&&fR<45) { //SSD2
1496 Double_t dd=0.0034;
1497 d=dd;
1498 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1499 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1500 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1501 for (Int_t i=0; i<12; i++) {
1502 if (TMath::Abs(z-3.9*(i+0.5))<0.15) {
1503 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1504 d+=0.0034;
1505 break;
1506 }
1507 if (TMath::Abs(z+3.9*(i+0.5))<0.15) {
1508 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1509 d+=0.0034;
1510 break;
1511 }
1512 if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1513 if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1514 }
1515 } else
1516 if (37<fR&&fR<41) { //SSD1
1517 Double_t dd=0.0034;
1518 d=dd;
1519 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1520 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1521 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1522 for (Int_t i=0; i<11; i++) {
1523 if (TMath::Abs(z-3.9*i)<0.15) {
1524 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1525 d+=dd;
1526 break;
1527 }
1528 if (TMath::Abs(z+3.9*i)<0.15) {
1529 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1530 d+=dd;
1531 break;
1532 }
1533 if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1534 if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1535 }
1536 } else
1537 if (13<fR&&fR<26) { //SDD
1538 Double_t dd=0.0033;
1539 d=dd;
1540 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1541
1542 if (TMath::Abs(y-1.80)<0.55) {
1543 d+=0.016;
1544 for (Int_t j=0; j<20; j++) {
1545 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1546 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1547 }
1548 }
1549 if (TMath::Abs(y+1.80)<0.55) {
1550 d+=0.016;
1551 for (Int_t j=0; j<20; j++) {
1552 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1553 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1554 }
1555 }
1556
1557 for (Int_t i=0; i<4; i++) {
1558 if (TMath::Abs(z-7.3*i)<0.60) {
1559 d+=dd;
1560 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1561 break;
1562 }
1563 if (TMath::Abs(z+7.3*i)<0.60) {
1564 d+=dd;
1565 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1566 break;
1567 }
1568 }
1569 } else
1570 if (6<fR&&fR<8) { //SPD2
1571 Double_t dd=0.0063; x0=21.5;
1572 d=dd;
1573 if (TMath::Abs(y-3.08)>0.5) d+=dd;
1574 //if (TMath::Abs(y-3.08)>0.45) d+=dd;
1575 if (TMath::Abs(y-3.03)<0.10) {d+=0.014;}
1576 } else
1577 if (3<fR&&fR<5) { //SPD1
1578 Double_t dd=0.0063; x0=21.5;
1579 d=dd;
1580 if (TMath::Abs(y+0.21)>0.6) d+=dd;
1581 //if (TMath::Abs(y+0.21)>0.45) d+=dd;
1582 if (TMath::Abs(y+0.10)<0.10) {d+=0.014;}
1583 }
1584
1585 return d;
1586}
1587
1588Double_t AliITStrackerMI::GetEffectiveThickness(Double_t y,Double_t z) const
1589{
1590 //--------------------------------------------------------------------
1591 //Returns the thickness between the current layer and the vertex (units X0)
1592 //--------------------------------------------------------------------
1593 Double_t d=0.0028*3*3; //beam pipe
1594 Double_t x0=0;
1595
1596 Double_t xn=fgLayers[fI].GetR();
1597 for (Int_t i=0; i<fI; i++) {
1598 Double_t xi=fgLayers[i].GetR();
1599 d+=fgLayers[i].GetThickness(y,z,x0)*xi*xi;
1600 }
1601
1602 if (fI>1) {
1603 Double_t xi=9.;
1604 d+=0.0097*xi*xi;
1605 }
1606
1607 if (fI>3) {
1608 Double_t xi=0.5*(fgLayers[3].GetR()+fgLayers[4].GetR());
1609 d+=0.0034*xi*xi;
1610 }
1611
1612 return d/(xn*xn);
1613}
1614
1615Int_t AliITStrackerMI::AliITSlayer::InRoad() const {
1616 //--------------------------------------------------------------------
1617 // This function returns number of clusters within the "window"
1618 //--------------------------------------------------------------------
1619 Int_t ncl=0;
1620 for (Int_t i=fI; i<fN; i++) {
00a7cc50 1621 const AliITSRecPoint *c=fClusters[i];
e43c066c 1622 if (c->GetZ() > fZmax) break;
1623 if (c->IsUsed()) continue;
1624 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
1625 Double_t y=fR*det.GetPhi() + c->GetY();
1626
1627 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
1628 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
1629
1630 if (y<fYmin) continue;
1631 if (y>fYmax) continue;
1632 ncl++;
1633 }
1634 return ncl;
1635}
1636
ef7253ac 1637Bool_t AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *t,
1638 const AliITStrackMI *c, Bool_t extra) {
e43c066c 1639 //--------------------------------------------------------------------
1640 // This function refits the track "t" at the position "x" using
1641 // the clusters from "c"
ef7253ac 1642 // If "extra"==kTRUE,
1643 // the clusters from overlapped modules get attached to "t"
e43c066c 1644 //--------------------------------------------------------------------
1645 Int_t index[kMaxLayer];
1646 Int_t k;
1647 for (k=0; k<kMaxLayer; k++) index[k]=-1;
1648 Int_t nc=c->GetNumberOfClusters();
1649 for (k=0; k<nc; k++) {
1650 Int_t idx=c->GetClusterIndex(k),nl=(idx&0xf0000000)>>28;
1651 index[nl]=idx;
1652 }
1653
1654 Int_t from, to, step;
1655 if (xx > t->GetX()) {
1656 from=0; to=kMaxLayer;
1657 step=+1;
1658 } else {
1659 from=kMaxLayer-1; to=-1;
1660 step=-1;
1661 }
1662
1663 for (Int_t i=from; i != to; i += step) {
1664 AliITSlayer &layer=fgLayers[i];
1665 Double_t r=layer.GetR();
1666
1667 {
1668 Double_t hI=i-0.5*step;
1669 if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) {
1670 Double_t rs=0.5*(fgLayers[i-step].GetR() + r);
1671 Double_t d=0.0034, x0=38.6;
1672 if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;}
1673 if (!t->PropagateTo(rs,-step*d,x0)) {
1674 return kFALSE;
1675 }
1676 }
1677 }
1678
1679 // remember old position [SR, GSI 18.02.2003]
1680 Double_t oldX=0., oldY=0., oldZ=0.;
1681 if (t->IsStartedTimeIntegral() && step==1) {
1682 t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ);
1683 }
1684 //
1685
1686 Double_t x,y,z;
1687 if (!t->GetGlobalXYZat(r,x,y,z)) {
1688 return kFALSE;
1689 }
1690 Double_t phi=TMath::ATan2(y,x);
1691 Int_t idet=layer.FindDetectorIndex(phi,z);
1692 if (idet<0) {
1693 return kFALSE;
1694 }
1695 const AliITSdetector &det=layer.GetDetector(idet);
1696 phi=det.GetPhi();
1697 if (!t->Propagate(phi,det.GetR())) {
1698 return kFALSE;
1699 }
1700 t->SetDetectorIndex(idet);
1701
00a7cc50 1702 const AliITSRecPoint *cl=0;
e43c066c 1703 Double_t maxchi2=1000.*kMaxChi2;
1704
1705 Int_t idx=index[i];
1706 if (idx>0) {
00a7cc50 1707 const AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(idx);
67c1e979 1708 if (c){
1709 if (idet != c->GetDetectorIndex()) {
1710 idet=c->GetDetectorIndex();
1711 const AliITSdetector &det=layer.GetDetector(idet);
1712 if (!t->Propagate(det.GetPhi(),det.GetR())) {
1713 return kFALSE;
1714 }
1715 t->SetDetectorIndex(idet);
1716 }
1717 //Double_t chi2=t->GetPredictedChi2(c);
1718 Int_t layer = (idx & 0xf0000000) >> 28;;
1719 Double_t chi2=GetPredictedChi2MI(t,c,layer);
1720 if (chi2<maxchi2) {
1721 cl=c;
1722 maxchi2=chi2;
1723 } else {
1724 return kFALSE;
1725 }
1726 }
1727 }
67c1e979 1728
67c1e979 1729 if (cl) {
1730 //if (!t->Update(cl,maxchi2,idx)) {
1731 if (!UpdateMI(t,cl,maxchi2,idx)) {
1732 return kFALSE;
1733 }
1734 t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
1735 }
1736
1737 {
1738 Double_t x0;
1739 Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0);
1740 t->CorrectForMaterial(-step*d,x0);
1741 }
1742
ef7253ac 1743 if (extra) { //search for extra clusters
1744 AliITStrackV2 tmp(*t);
1745 Double_t dz=4*TMath::Sqrt(tmp.GetSigmaZ2()+kSigmaZ2[i]);
1746 if (dz < 0.5*TMath::Abs(tmp.GetTgl())) dz=0.5*TMath::Abs(tmp.GetTgl());
1747 Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+kSigmaY2[i]);
1748 if (dy < 0.5*TMath::Abs(tmp.GetSnp())) dy=0.5*TMath::Abs(tmp.GetSnp());
1749 Double_t zmin=t->GetZ() - dz;
1750 Double_t zmax=t->GetZ() + dz;
1751 Double_t ymin=t->GetY() + phi*r - dy;
1752 Double_t ymax=t->GetY() + phi*r + dy;
1753 layer.SelectClusters(zmin,zmax,ymin,ymax);
1754
1755 const AliITSRecPoint *c=0; Int_t ci=-1,cci=-1;
1756 Double_t maxchi2=1000.*kMaxChi2, tolerance=0.1;
1757 while ((c=layer.GetNextCluster(ci))!=0) {
1758 if (idet == c->GetDetectorIndex()) continue;
1759
1760 const AliITSdetector &det=layer.GetDetector(c->GetDetectorIndex());
1761
1762 if (!tmp.Propagate(det.GetPhi(),det.GetR())) continue;
1763
1764 if (TMath::Abs(tmp.GetZ() - c->GetZ()) > tolerance) continue;
1765 if (TMath::Abs(tmp.GetY() - c->GetY()) > tolerance) continue;
1766
1767 Double_t chi2=tmp.GetPredictedChi2(c);
1768 if (chi2<maxchi2) { maxchi2=chi2; cci=ci; }
1769 }
1770 if (cci>=0) t->SetExtraCluster(i,(i<<28)+cci);
1771 }
1772
67c1e979 1773 // track time update [SR, GSI 17.02.2003]
1774 if (t->IsStartedTimeIntegral() && step==1) {
1775 Double_t newX, newY, newZ;
1776 t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
1777 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
1778 (oldZ-newZ)*(oldZ-newZ);
1779 t->AddTimeStep(TMath::Sqrt(dL2));
1780 }
1781 //
1782
1783 }
1784
1785 if (!t->PropagateTo(xx,0.,0.)) return kFALSE;
1786 return kTRUE;
1787}
1788
67c1e979 1789Bool_t
1790AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *t,const Int_t *clindex) {
1791 //--------------------------------------------------------------------
1792 // This function refits the track "t" at the position "x" using
1793 // the clusters from array
1794 //--------------------------------------------------------------------
1795 Int_t index[kMaxLayer];
1796 Int_t k;
1797 for (k=0; k<kMaxLayer; k++) index[k]=-1;
1798 //
1799 for (k=0; k<kMaxLayer; k++) {
1800 index[k]=clindex[k];
1801 }
1802
1803 Int_t from, to, step;
1804 if (xx > t->GetX()) {
1805 from=0; to=kMaxLayer;
1806 step=+1;
1807 } else {
1808 from=kMaxLayer-1; to=-1;
1809 step=-1;
1810 }
1811
1812 for (Int_t i=from; i != to; i += step) {
1813 AliITSlayer &layer=fgLayers[i];
1814 Double_t r=layer.GetR();
1815 if (step<0 && xx>r) break; //
1816 {
1817 Double_t hI=i-0.5*step;
1818 if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) {
1819 Double_t rs=0.5*(fgLayers[i-step].GetR() + r);
1820 Double_t d=0.0034, x0=38.6;
1821 if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;}
1822 if (!t->PropagateTo(rs,-step*d,x0)) {
1823 return kFALSE;
e43c066c 1824 }
67c1e979 1825 }
1826 }
1827
1828 // remember old position [SR, GSI 18.02.2003]
1829 Double_t oldX=0., oldY=0., oldZ=0.;
1830 if (t->IsStartedTimeIntegral() && step==1) {
1831 t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ);
1832 }
1833 //
1834
1835 Double_t x,y,z;
1836 if (!t->GetGlobalXYZat(r,x,y,z)) {
1837 return kFALSE;
1838 }
1839 Double_t phi=TMath::ATan2(y,x);
1840 Int_t idet=layer.FindDetectorIndex(phi,z);
1841 if (idet<0) {
1842 return kFALSE;
1843 }
1844 const AliITSdetector &det=layer.GetDetector(idet);
1845 phi=det.GetPhi();
1846 if (!t->Propagate(phi,det.GetR())) {
1847 return kFALSE;
1848 }
1849 t->SetDetectorIndex(idet);
1850
00a7cc50 1851 const AliITSRecPoint *cl=0;
67c1e979 1852 Double_t maxchi2=1000.*kMaxChi2;
1853
1854 Int_t idx=index[i];
1855 if (idx>0) {
00a7cc50 1856 const AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(idx);
67c1e979 1857 if (c){
1858 if (idet != c->GetDetectorIndex()) {
1859 idet=c->GetDetectorIndex();
1860 const AliITSdetector &det=layer.GetDetector(idet);
1861 if (!t->Propagate(det.GetPhi(),det.GetR())) {
1862 return kFALSE;
1863 }
1864 t->SetDetectorIndex(idet);
1865 }
1866 //Double_t chi2=t->GetPredictedChi2(c);
1867 Int_t layer = (idx & 0xf0000000) >> 28;;
1868 Double_t chi2=GetPredictedChi2MI(t,c,layer);
1869 if (chi2<maxchi2) {
1870 cl=c;
1871 maxchi2=chi2;
1872 } else {
1873 return kFALSE;
1874 }
e43c066c 1875 }
1876 }
1877 /*
1878 if (cl==0)
1879 if (t->GetNumberOfClusters()>2) {
1880 Double_t dz=4*TMath::Sqrt(t->GetSigmaZ2()+kSigmaZ2[i]);
1881 Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+kSigmaY2[i]);
1882 Double_t zmin=t->GetZ() - dz;
1883 Double_t zmax=t->GetZ() + dz;
1884 Double_t ymin=t->GetY() + phi*r - dy;
1885 Double_t ymax=t->GetY() + phi*r + dy;
1886 layer.SelectClusters(zmin,zmax,ymin,ymax);
1887
00a7cc50 1888 const AliITSRecPoint *c=0; Int_t ci=-1;
e43c066c 1889 while ((c=layer.GetNextCluster(ci))!=0) {
1890 if (idet != c->GetDetectorIndex()) continue;
1891 Double_t chi2=t->GetPredictedChi2(c);
1892 if (chi2<maxchi2) { cl=c; maxchi2=chi2; idx=ci; }
1893 }
1894 }
1895 */
1896 if (cl) {
1897 //if (!t->Update(cl,maxchi2,idx)) {
1898 if (!UpdateMI(t,cl,maxchi2,idx)) {
1899 return kFALSE;
1900 }
1901 t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
1902 }
1903
1904 {
1905 Double_t x0;
1906 Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0);
1907 t->CorrectForMaterial(-step*d,x0);
1908 }
1909
1910 // track time update [SR, GSI 17.02.2003]
1911 if (t->IsStartedTimeIntegral() && step==1) {
1912 Double_t newX, newY, newZ;
1913 t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
1914 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
1915 (oldZ-newZ)*(oldZ-newZ);
1916 t->AddTimeStep(TMath::Sqrt(dL2));
1917 }
1918 //
1919
1920 }
1921
1922 if (!t->PropagateTo(xx,0.,0.)) return kFALSE;
1923 return kTRUE;
1924}
1925
15dd636f 1926Double_t AliITStrackerMI::GetNormalizedChi2(AliITStrackMI * track, Int_t mode)
e43c066c 1927{
1928 //
1929 // calculate normalized chi2
1930 // return NormalizedChi2(track,0);
1931 Float_t chi2 = 0;
1932 Float_t sum=0;
1933 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
1934 // track->fdEdxMismatch=0;
1935 Float_t dedxmismatch =0;
1936 Float_t *ny = GetNy(fCurrentEsdTrack), *nz = GetNz(fCurrentEsdTrack);
1937 if (mode<100){
1938 for (Int_t i = 0;i<6;i++){
b9671574 1939 if (track->GetClIndex(i)>0){
e43c066c 1940 Float_t cerry, cerrz;
1941 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1942 else
b9671574 1943 { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
e43c066c 1944 cerry*=cerry;
1945 cerrz*=cerrz;
b9671574 1946 Float_t cchi2 = (track->GetDy(i)*track->GetDy(i)/cerry)+(track->GetDz(i)*track->GetDz(i)/cerrz);
e43c066c 1947 if (i>1){
b9671574 1948 Float_t ratio = track->GetNormQ(i)/track->GetExpQ();
e43c066c 1949 if (ratio<0.5) {
1950 cchi2+=(0.5-ratio)*10.;
1951 //track->fdEdxMismatch+=(0.5-ratio)*10.;
1952 dedxmismatch+=(0.5-ratio)*10.;
1953 }
1954 }
1955 if (i<2 ||i>3){
b9671574 1956 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster( track->GetClIndex(i));
e43c066c 1957 Double_t delta = cl->GetNy()+cl->GetNz()-ny[i]-nz[i];
1958 if (delta>1) chi2 +=0.5*TMath::Min(delta/2,2.);
1959 if (i<2) chi2+=2*cl->GetDeltaProbability();
1960 }
1961 chi2+=cchi2;
1962 sum++;
1963 }
1964 }
b9671574 1965 if (TMath::Abs(track->GetdEdxMismatch()-dedxmismatch)>0.0001){
1966 track->SetdEdxMismatch(dedxmismatch);
e43c066c 1967 }
1968 }
1969 else{
1970 for (Int_t i = 0;i<4;i++){
b9671574 1971 if (track->GetClIndex(i)>0){
e43c066c 1972 Float_t cerry, cerrz;
1973 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
b9671574 1974 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
e43c066c 1975 cerry*=cerry;
1976 cerrz*=cerrz;
b9671574 1977 chi2+= (track->GetDy(i)*track->GetDy(i)/cerry);
1978 chi2+= (track->GetDz(i)*track->GetDz(i)/cerrz);
e43c066c 1979 sum++;
1980 }
1981 }
1982 for (Int_t i = 4;i<6;i++){
b9671574 1983 if (track->GetClIndex(i)>0){
e43c066c 1984 Float_t cerry, cerrz;
1985 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
b9671574 1986 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
e43c066c 1987 cerry*=cerry;
1988 cerrz*=cerrz;
1989 Float_t cerryb, cerrzb;
1990 if (ny[i+6]>0) {cerryb = erry[i+6]; cerrzb=errz[i+6];}
b9671574 1991 else { cerryb= track->GetSigmaY(i+6); cerrzb = track->GetSigmaZ(i+6);}
e43c066c 1992 cerryb*=cerryb;
1993 cerrzb*=cerrzb;
b9671574 1994 chi2+= TMath::Min((track->GetDy(i+6)*track->GetDy(i+6)/cerryb),track->GetDy(i)*track->GetDy(i)/cerry);
1995 chi2+= TMath::Min((track->GetDz(i+6)*track->GetDz(i+6)/cerrzb),track->GetDz(i)*track->GetDz(i)/cerrz);
e43c066c 1996 sum++;
1997 }
1998 }
1999 }
b9671574 2000 if (track->GetESDtrack()->GetTPCsignal()>85){
2001 Float_t ratio = track->GetdEdx()/track->GetESDtrack()->GetTPCsignal();
e43c066c 2002 if (ratio<0.5) {
2003 chi2+=(0.5-ratio)*5.;
2004 }
2005 if (ratio>2){
2006 chi2+=(ratio-2.0)*3;
2007 }
2008 }
2009 //
b9671574 2010 Double_t match = TMath::Sqrt(track->GetChi22());
2011 if (track->GetConstrain()) match/=track->GetNumberOfClusters();
2012 if (!track->GetConstrain()) match/=track->GetNumberOfClusters()-2.;
e43c066c 2013 if (match<0) match=0;
b9671574 2014 Float_t deadzonefactor = (track->GetNDeadZone()>0) ? 3*(1.1-track->GetDeadZoneProbability()):0.;
2015 Double_t normchi2 = 2*track->GetNSkipped()+match+deadzonefactor+(1+(2*track->GetNSkipped()+deadzonefactor)/track->GetNumberOfClusters())*
2016 (chi2)/TMath::Max(double(sum-track->GetNSkipped()),
2017 1./(1.+track->GetNSkipped()));
e43c066c 2018
2019 return normchi2;
2020}
2021
2022
15dd636f 2023Double_t AliITStrackerMI::GetMatchingChi2(AliITStrackMI * track1, AliITStrackMI * track2)
e43c066c 2024{
2025 //
2026 // return matching chi2 between two tracks
15dd636f 2027 AliITStrackMI track3(*track2);
e43c066c 2028 track3.Propagate(track1->GetAlpha(),track1->GetX());
2029 TMatrixD vec(5,1);
6c94f330 2030 vec(0,0)=track1->GetY() - track3.GetY();
2031 vec(1,0)=track1->GetZ() - track3.GetZ();
2032 vec(2,0)=track1->GetSnp() - track3.GetSnp();
2033 vec(3,0)=track1->GetTgl() - track3.GetTgl();
2034 vec(4,0)=track1->Get1Pt() - track3.Get1Pt();
e43c066c 2035 //
2036 TMatrixD cov(5,5);
6c94f330 2037 cov(0,0) = track1->GetSigmaY2()+track3.GetSigmaY2();
2038 cov(1,1) = track1->GetSigmaZ2()+track3.GetSigmaZ2();
2039 cov(2,2) = track1->GetSigmaSnp2()+track3.GetSigmaSnp2();
2040 cov(3,3) = track1->GetSigmaTgl2()+track3.GetSigmaTgl2();
2041 cov(4,4) = track1->GetSigma1Pt2()+track3.GetSigma1Pt2();
e43c066c 2042
6c94f330 2043 cov(0,1)=cov(1,0) = track1->GetSigmaZY()+track3.GetSigmaZY();
2044 cov(0,2)=cov(2,0) = track1->GetSigmaSnpY()+track3.GetSigmaSnpY();
2045 cov(0,3)=cov(3,0) = track1->GetSigmaTglY()+track3.GetSigmaTglY();
2046 cov(0,4)=cov(4,0) = track1->GetSigma1PtY()+track3.GetSigma1PtY();
e43c066c 2047 //
6c94f330 2048 cov(1,2)=cov(2,1) = track1->GetSigmaSnpZ()+track3.GetSigmaSnpZ();
2049 cov(1,3)=cov(3,1) = track1->GetSigmaTglZ()+track3.GetSigmaTglZ();
2050 cov(1,4)=cov(4,1) = track1->GetSigma1PtZ()+track3.GetSigma1PtZ();
e43c066c 2051 //
6c94f330 2052 cov(2,3)=cov(3,2) = track1->GetSigmaTglSnp()+track3.GetSigmaTglSnp();
2053 cov(2,4)=cov(4,2) = track1->GetSigma1PtSnp()+track3.GetSigma1PtSnp();
e43c066c 2054 //
6c94f330 2055 cov(3,4)=cov(4,3) = track1->GetSigma1PtTgl()+track3.GetSigma1PtTgl();
e43c066c 2056
2057 cov.Invert();
2058 TMatrixD vec2(cov,TMatrixD::kMult,vec);
2059 TMatrixD chi2(vec2,TMatrixD::kTransposeMult,vec);
2060 return chi2(0,0);
2061}
2062
2063Double_t AliITStrackerMI::GetDeadZoneProbability(Double_t zpos, Double_t zerr)
2064{
2065 //
2066 // return probability that given point - characterized by z position and error is in dead zone
2067 //
2068 Double_t probability =0;
2069 Double_t absz = TMath::Abs(zpos);
2070 Double_t nearestz = (absz<2)? 0.:7.1;
2071 if (TMath::Abs(absz-nearestz)>0.25+3*zerr) return 0;
2072 Double_t zmin=0, zmax=0;
2073 if (zpos<-6.){
2074 zmin = -7.25; zmax = -6.95;
2075 }
2076 if (zpos>6){
2077 zmin = 7.0; zmax =7.3;
2078 }
2079 if (absz<2){
2080 zmin = -0.75; zmax = 1.5;
2081 }
2082 probability = (TMath::Erf((zpos-zmin)/zerr) - TMath::Erf((zpos-zmax)/zerr))*0.5;
2083 return probability;
2084}
2085
2086
15dd636f 2087Double_t AliITStrackerMI::GetTruncatedChi2(AliITStrackMI * track, Float_t fac)
e43c066c 2088{
2089 //
2090 // calculate normalized chi2
2091 Float_t chi2[6];
2092 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2093 Float_t ncl = 0;
2094 for (Int_t i = 0;i<6;i++){
b9671574 2095 if (TMath::Abs(track->GetDy(i))>0){
2096 chi2[i]= (track->GetDy(i)/erry[i])*(track->GetDy(i)/erry[i]);
2097 chi2[i]+= (track->GetDz(i)/errz[i])*(track->GetDz(i)/errz[i]);
e43c066c 2098 ncl++;
2099 }
2100 else{chi2[i]=10000;}
2101 }
2102 Int_t index[6];
2103 TMath::Sort(6,chi2,index,kFALSE);
2104 Float_t max = float(ncl)*fac-1.;
2105 Float_t sumchi=0, sumweight=0;
2106 for (Int_t i=0;i<max+1;i++){
2107 Float_t weight = (i<max)?1.:(max+1.-i);
2108 sumchi+=weight*chi2[index[i]];
2109 sumweight+=weight;
2110 }
2111 Double_t normchi2 = sumchi/sumweight;
2112 return normchi2;
2113}
2114
2115
15dd636f 2116Double_t AliITStrackerMI::GetInterpolatedChi2(AliITStrackMI * forwardtrack, AliITStrackMI * backtrack)
e43c066c 2117{
2118 //
2119 // calculate normalized chi2
2120 // if (forwardtrack->fNUsed>0.3*float(forwardtrack->GetNumberOfClusters())) return 10000;
2121 Int_t npoints = 0;
2122 Double_t res =0;
2123 for (Int_t i=0;i<6;i++){
b9671574 2124 if ( (backtrack->GetSigmaY(i)<0.000000001) || (forwardtrack->GetSigmaY(i)<0.000000001)) continue;
2125 Double_t sy1 = forwardtrack->GetSigmaY(i);
2126 Double_t sz1 = forwardtrack->GetSigmaZ(i);
2127 Double_t sy2 = backtrack->GetSigmaY(i);
2128 Double_t sz2 = backtrack->GetSigmaZ(i);
e43c066c 2129 if (i<2){ sy2=1000.;sz2=1000;}
2130 //
b9671574 2131 Double_t dy0 = (forwardtrack->GetDy(i)/(sy1*sy1) +backtrack->GetDy(i)/(sy2*sy2))/(1./(sy1*sy1)+1./(sy2*sy2));
2132 Double_t dz0 = (forwardtrack->GetDz(i)/(sz1*sz1) +backtrack->GetDz(i)/(sz2*sz2))/(1./(sz1*sz1)+1./(sz2*sz2));
e43c066c 2133 //
2134 Double_t nz0 = dz0*TMath::Sqrt((1./(sz1*sz1)+1./(sz2*sz2)));
2135 Double_t ny0 = dy0*TMath::Sqrt((1./(sy1*sy1)+1./(sy2*sy2)));
2136 //
2137 res+= nz0*nz0+ny0*ny0;
2138 npoints++;
2139 }
2140 if (npoints>1) return
2141 TMath::Max(TMath::Abs(0.3*forwardtrack->Get1Pt())-0.5,0.)+
2142 //2*forwardtrack->fNUsed+
b9671574 2143 res/TMath::Max(double(npoints-forwardtrack->GetNSkipped()),
2144 1./(1.+forwardtrack->GetNSkipped()));
e43c066c 2145 return 1000;
2146}
2147
2148
2149
2150
2151
2152Float_t *AliITStrackerMI::GetWeight(Int_t index) {
2153 //--------------------------------------------------------------------
2154 // Return pointer to a given cluster
2155 //--------------------------------------------------------------------
2156 Int_t l=(index & 0xf0000000) >> 28;
2157 Int_t c=(index & 0x0fffffff) >> 00;
2158 return fgLayers[l].GetWeight(c);
2159}
2160
15dd636f 2161void AliITStrackerMI::RegisterClusterTracks(AliITStrackMI* track,Int_t id)
e43c066c 2162{
2163 //---------------------------------------------
2164 // register track to the list
628e7bb0 2165 //
b9671574 2166 if (track->GetESDtrack()->GetKinkIndex(0)!=0) return; //don't register kink tracks
628e7bb0 2167 //
2168 //
e43c066c 2169 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2170 Int_t index = track->GetClusterIndex(icluster);
2171 Int_t l=(index & 0xf0000000) >> 28;
2172 Int_t c=(index & 0x0fffffff) >> 00;
b9671574 2173 if (c>fgLayers[l].GetNumberOfClusters()) continue;
e43c066c 2174 for (Int_t itrack=0;itrack<4;itrack++){
b9671574 2175 if (fgLayers[l].GetClusterTracks(itrack,c)<0){
2176 fgLayers[l].SetClusterTracks(itrack,c,id);
e43c066c 2177 break;
2178 }
2179 }
2180 }
2181}
15dd636f 2182void AliITStrackerMI::UnRegisterClusterTracks(AliITStrackMI* track, Int_t id)
e43c066c 2183{
2184 //---------------------------------------------
2185 // unregister track from the list
2186 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2187 Int_t index = track->GetClusterIndex(icluster);
2188 Int_t l=(index & 0xf0000000) >> 28;
2189 Int_t c=(index & 0x0fffffff) >> 00;
b9671574 2190 if (c>fgLayers[l].GetNumberOfClusters()) continue;
e43c066c 2191 for (Int_t itrack=0;itrack<4;itrack++){
b9671574 2192 if (fgLayers[l].GetClusterTracks(itrack,c)==id){
2193 fgLayers[l].SetClusterTracks(itrack,c,-1);
e43c066c 2194 }
2195 }
2196 }
2197}
00a7cc50 2198Float_t AliITStrackerMI::GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSRecPoint *clist[6])
e43c066c 2199{
2200 //-------------------------------------------------------------
2201 //get number of shared clusters
2202 //-------------------------------------------------------------
2203 Float_t shared=0;
2204 for (Int_t i=0;i<6;i++) { list[i]=-1, clist[i]=0;}
2205 // mean number of clusters
2206 Float_t *ny = GetNy(id), *nz = GetNz(id);
2207
2208
2209 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2210 Int_t index = track->GetClusterIndex(icluster);
2211 Int_t l=(index & 0xf0000000) >> 28;
2212 Int_t c=(index & 0x0fffffff) >> 00;
b9671574 2213 if (c>fgLayers[l].GetNumberOfClusters()) continue;
e43c066c 2214 if (ny[l]==0){
2215 printf("problem\n");
2216 }
00a7cc50 2217 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
e43c066c 2218 Float_t weight=1;
2219 //
2220 Float_t deltan = 0;
2221 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
b9671574 2222 if (l>2&&track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
e43c066c 2223 if (l<2 || l>3){
2224 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2225 }
2226 else{
2227 deltan = (cl->GetNz()-nz[l]);
2228 }
2229 if (deltan>2.0) continue; // extended - highly probable shared cluster
2230 weight = 2./TMath::Max(3.+deltan,2.);
2231 //
2232 for (Int_t itrack=0;itrack<4;itrack++){
b9671574 2233 if (fgLayers[l].GetClusterTracks(itrack,c)>=0 && fgLayers[l].GetClusterTracks(itrack,c)!=id){
e43c066c 2234 list[l]=index;
00a7cc50 2235 clist[l] = (AliITSRecPoint*)GetCluster(index);
e43c066c 2236 shared+=weight;
2237 break;
2238 }
2239 }
2240 }
b9671574 2241 track->SetNUsed(shared);
e43c066c 2242 return shared;
2243}
2244
15dd636f 2245Int_t AliITStrackerMI::GetOverlapTrack(AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6],Int_t overlist[6])
e43c066c 2246{
2247 //
2248 // find first shared track
2249 //
2250 // mean number of clusters
2251 Float_t *ny = GetNy(trackID), *nz = GetNz(trackID);
2252 //
2253 for (Int_t i=0;i<6;i++) overlist[i]=-1;
2254 Int_t sharedtrack=100000;
2255 Int_t tracks[24],trackindex=0;
2256 for (Int_t i=0;i<24;i++) {tracks[i]=-1;}
2257 //
2258 for (Int_t icluster=0;icluster<6;icluster++){
2259 if (clusterlist[icluster]<0) continue;
2260 Int_t index = clusterlist[icluster];
2261 Int_t l=(index & 0xf0000000) >> 28;
2262 Int_t c=(index & 0x0fffffff) >> 00;
2263 if (ny[l]==0){
2264 printf("problem\n");
2265 }
b9671574 2266 if (c>fgLayers[l].GetNumberOfClusters()) continue;
e43c066c 2267 //if (l>3) continue;
00a7cc50 2268 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
e43c066c 2269 //
2270 Float_t deltan = 0;
2271 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
b9671574 2272 if (l>2&&track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
e43c066c 2273 if (l<2 || l>3){
2274 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2275 }
2276 else{
2277 deltan = (cl->GetNz()-nz[l]);
2278 }
2279 if (deltan>2.0) continue; // extended - highly probable shared cluster
2280 //
2281 for (Int_t itrack=3;itrack>=0;itrack--){
b9671574 2282 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2283 if (fgLayers[l].GetClusterTracks(itrack,c)!=trackID){
2284 tracks[trackindex] = fgLayers[l].GetClusterTracks(itrack,c);
e43c066c 2285 trackindex++;
2286 }
2287 }
2288 }
2289 if (trackindex==0) return -1;
2290 if (trackindex==1){
2291 sharedtrack = tracks[0];
2292 }else{
2293 if (trackindex==2) sharedtrack =TMath::Min(tracks[0],tracks[1]);
2294 else{
2295 //
2296 Int_t track[24], cluster[24];
2297 for (Int_t i=0;i<trackindex;i++){ track[i]=-1; cluster[i]=0;}
2298 Int_t index =0;
2299 //
2300 for (Int_t i=0;i<trackindex;i++){
2301 if (tracks[i]<0) continue;
2302 track[index] = tracks[i];
2303 cluster[index]++;
2304 for (Int_t j=i+1;j<trackindex;j++){
2305 if (tracks[j]<0) continue;
2306 if (tracks[j]==tracks[i]){
2307 cluster[index]++;
2308 tracks[j]=-1;
2309 }
2310 }
2311 index++;
2312 }
2313 Int_t max=0;
2314 for (Int_t i=0;i<index;i++){
2315 if (cluster[index]>max) {
2316 sharedtrack=track[index];
2317 max=cluster[index];
2318 }
2319 }
2320 }
2321 }
2322
2323 if (sharedtrack>=100000) return -1;
2324 //
2325 // make list of overlaps
2326 shared =0;
2327 for (Int_t icluster=0;icluster<6;icluster++){
2328 if (clusterlist[icluster]<0) continue;
2329 Int_t index = clusterlist[icluster];
2330 Int_t l=(index & 0xf0000000) >> 28;
2331 Int_t c=(index & 0x0fffffff) >> 00;
b9671574 2332 if (c>fgLayers[l].GetNumberOfClusters()) continue;
00a7cc50 2333 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
e43c066c 2334 if (l==0 || l==1){
2335 if (cl->GetNy()>2) continue;
2336 if (cl->GetNz()>2) continue;
2337 }
2338 if (l==4 || l==5){
2339 if (cl->GetNy()>3) continue;
2340 if (cl->GetNz()>3) continue;
2341 }
2342 //
2343 for (Int_t itrack=3;itrack>=0;itrack--){
b9671574 2344 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2345 if (fgLayers[l].GetClusterTracks(itrack,c)==sharedtrack){
e43c066c 2346 overlist[l]=index;
2347 shared++;
2348 }
2349 }
2350 }
2351 return sharedtrack;
2352}
2353
2354
15dd636f 2355AliITStrackMI * AliITStrackerMI::GetBest2Tracks(Int_t trackID1, Int_t trackID2, Float_t th0, Float_t th1){
e43c066c 2356 //
2357 // try to find track hypothesys without conflicts
2358 // with minimal chi2;
2359 TClonesArray *arr1 = (TClonesArray*)fTrackHypothesys.At(trackID1);
2360 Int_t entries1 = arr1->GetEntriesFast();
2361 TClonesArray *arr2 = (TClonesArray*)fTrackHypothesys.At(trackID2);
15dd636f 2362 if (!arr2) return (AliITStrackMI*) arr1->UncheckedAt(0);
e43c066c 2363 Int_t entries2 = arr2->GetEntriesFast();
15dd636f 2364 if (entries2<=0) return (AliITStrackMI*) arr1->UncheckedAt(0);
e43c066c 2365 //
15dd636f 2366 AliITStrackMI * track10=(AliITStrackMI*) arr1->UncheckedAt(0);
2367 AliITStrackMI * track20=(AliITStrackMI*) arr2->UncheckedAt(0);
e43c066c 2368 if (TMath::Abs(1./track10->Get1Pt())>0.5+TMath::Abs(1/track20->Get1Pt())) return track10;
2369
2370 for (Int_t itrack=0;itrack<entries1;itrack++){
15dd636f 2371 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
e43c066c 2372 UnRegisterClusterTracks(track,trackID1);
2373 }
2374 //
2375 for (Int_t itrack=0;itrack<entries2;itrack++){
15dd636f 2376 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
e43c066c 2377 UnRegisterClusterTracks(track,trackID2);
2378 }
2379 Int_t index1=0;
2380 Int_t index2=0;
2381 Float_t maxconflicts=6;
2382 Double_t maxchi2 =1000.;
2383 //
2384 // get weight of hypothesys - using best hypothesy
2385 Double_t w1,w2;
2386
2387 Int_t list1[6],list2[6];
00a7cc50 2388 AliITSRecPoint *clist1[6], *clist2[6] ;
e43c066c 2389 RegisterClusterTracks(track10,trackID1);
2390 RegisterClusterTracks(track20,trackID2);
2391 Float_t conflict1 = GetNumberOfSharedClusters(track10,trackID1,list1,clist1);
2392 Float_t conflict2 = GetNumberOfSharedClusters(track20,trackID2,list2,clist2);
2393 UnRegisterClusterTracks(track10,trackID1);
2394 UnRegisterClusterTracks(track20,trackID2);
2395 //
2396 // normalized chi2
2397 Float_t chi21 =0,chi22=0,ncl1=0,ncl2=0;
2398 Float_t nerry[6],nerrz[6];
2399 Float_t *erry1=GetErrY(trackID1),*errz1 = GetErrZ(trackID1);
2400 Float_t *erry2=GetErrY(trackID2),*errz2 = GetErrZ(trackID2);
2401 for (Int_t i=0;i<6;i++){
2402 if ( (erry1[i]>0) && (erry2[i]>0)) {
2403 nerry[i] = TMath::Min(erry1[i],erry2[i]);
2404 nerrz[i] = TMath::Min(errz1[i],errz2[i]);
2405 }else{
2406 nerry[i] = TMath::Max(erry1[i],erry2[i]);
2407 nerrz[i] = TMath::Max(errz1[i],errz2[i]);
2408 }
b9671574 2409 if (TMath::Abs(track10->GetDy(i))>0.000000000000001){
2410 chi21 += track10->GetDy(i)*track10->GetDy(i)/(nerry[i]*nerry[i]);
2411 chi21 += track10->GetDz(i)*track10->GetDz(i)/(nerrz[i]*nerrz[i]);
e43c066c 2412 ncl1++;
2413 }
b9671574 2414 if (TMath::Abs(track20->GetDy(i))>0.000000000000001){
2415 chi22 += track20->GetDy(i)*track20->GetDy(i)/(nerry[i]*nerry[i]);
2416 chi22 += track20->GetDz(i)*track20->GetDz(i)/(nerrz[i]*nerrz[i]);
e43c066c 2417 ncl2++;
2418 }
2419 }
2420 chi21/=ncl1;
2421 chi22/=ncl2;
2422 //
2423 //
b9671574 2424 Float_t d1 = TMath::Sqrt(track10->GetD(0)*track10->GetD(0)+track10->GetD(1)*track10->GetD(1))+0.1;
2425 Float_t d2 = TMath::Sqrt(track20->GetD(0)*track20->GetD(0)+track20->GetD(1)*track20->GetD(1))+0.1;
e43c066c 2426 Float_t s1 = TMath::Sqrt(track10->GetSigmaY2()*track10->GetSigmaZ2());
2427 Float_t s2 = TMath::Sqrt(track20->GetSigmaY2()*track20->GetSigmaZ2());
2428 //
2429 w1 = (d2/(d1+d2)+ 2*s2/(s1+s2)+
2430 +s2/(s1+s2)*0.5*(chi22+2.)/(chi21+chi22+4.)
2431 +1.*TMath::Abs(1./track10->Get1Pt())/(TMath::Abs(1./track10->Get1Pt())+TMath::Abs(1./track20->Get1Pt()))
2432 );
2433 w2 = (d1/(d1+d2)+ 2*s1/(s1+s2)+
2434 s1/(s1+s2)*0.5*(chi21+2.)/(chi21+chi22+4.)
2435 +1.*TMath::Abs(1./track20->Get1Pt())/(TMath::Abs(1./track10->Get1Pt())+TMath::Abs(1./track20->Get1Pt()))
2436 );
2437
2438 Double_t sumw = w1+w2;
2439 w1/=sumw;
2440 w2/=sumw;
2441 if (w1<w2*0.5) {
2442 w1 = (d2+0.5)/(d1+d2+1.);
2443 w2 = (d1+0.5)/(d1+d2+1.);
2444 }
2445 // Float_t maxmax = w1*track10->fChi2MIP[0]+w2*track20->fChi2MIP[0]+w1*conflict1+w2*conflict2+1.;
2446 //Float_t maxconflicts0 = w1*conflict1+w2*conflict2;
2447 //
2448 // get pair of "best" hypothesys
2449 //
2450 Float_t * ny1 = GetNy(trackID1), * nz1 = GetNz(trackID1);
2451 Float_t * ny2 = GetNy(trackID2), * nz2 = GetNz(trackID2);
2452
2453 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
15dd636f 2454 AliITStrackMI * track1=(AliITStrackMI*) arr1->UncheckedAt(itrack1);
e43c066c 2455 //if (track1->fFakeRatio>0) continue;
2456 RegisterClusterTracks(track1,trackID1);
2457 for (Int_t itrack2=0;itrack2<entries2;itrack2++){
15dd636f 2458 AliITStrackMI * track2=(AliITStrackMI*) arr2->UncheckedAt(itrack2);
e43c066c 2459
2460 // Float_t current = w1*track1->fChi2MIP[0]+w2*track2->fChi2MIP[0];
2461 //if (track2->fFakeRatio>0) continue;
2462 Float_t nskipped=0;
2463 RegisterClusterTracks(track2,trackID2);
2464 Int_t list1[6],list2[6];
00a7cc50 2465 AliITSRecPoint *clist1[6], *clist2[6] ;
e43c066c 2466 Float_t cconflict1 = GetNumberOfSharedClusters(track1,trackID1,list1,clist1);
2467 Float_t cconflict2 = GetNumberOfSharedClusters(track2,trackID2,list2,clist2);
2468 UnRegisterClusterTracks(track2,trackID2);
2469 //
b9671574 2470 if (track1->GetConstrain()) nskipped+=w1*track1->GetNSkipped();
2471 if (track2->GetConstrain()) nskipped+=w2*track2->GetNSkipped();
e43c066c 2472 if (nskipped>0.5) continue;
2473 //
2474 //if ( w1*conflict1+w2*conflict2>maxconflicts0) continue;
2475 if (conflict1+1<cconflict1) continue;
2476 if (conflict2+1<cconflict2) continue;
2477 Float_t conflict=0;
2478 Float_t sumchi2=0;
2479 Float_t sum=0;
2480 for (Int_t i=0;i<6;i++){
2481 //
2482 Float_t c1 =0.; // conflict coeficients
2483 Float_t c2 =0.;
2484 if (clist1[i]&&clist2[i]){
2485 Float_t deltan = 0;
2486 if (i<2 || i>3){
2487 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-TMath::Max(ny1[i],ny2[i])-TMath::Max(nz1[i],nz2[i]));
2488 }
2489 else{
2490 deltan = (clist1[i]->GetNz()-TMath::Max(nz1[i],nz2[i]));
2491 }
2492 c1 = 2./TMath::Max(3.+deltan,2.);
2493 c2 = 2./TMath::Max(3.+deltan,2.);
2494 }
2495 else{
2496 if (clist1[i]){
2497 Float_t deltan = 0;
2498 if (i<2 || i>3){
2499 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-ny1[i]-nz1[i]);
2500 }
2501 else{
2502 deltan = (clist1[i]->GetNz()-nz1[i]);
2503 }
2504 c1 = 2./TMath::Max(3.+deltan,2.);
2505 c2 = 0;
2506 }
2507
2508 if (clist2[i]){
2509 Float_t deltan = 0;
2510 if (i<2 || i>3){
2511 deltan = (clist2[i]->GetNy()+clist2[i]->GetNz()-ny2[i]-nz2[i]);
2512 }
2513 else{
2514 deltan = (clist2[i]->GetNz()-nz2[i]);
2515 }
2516 c2 = 2./TMath::Max(3.+deltan,2.);
2517 c1 = 0;
2518 }
2519 }
2520 //
2521 Double_t chi21=0,chi22=0;
b9671574 2522 if (TMath::Abs(track1->GetDy(i))>0.) {
2523 chi21 = (track1->GetDy(i)/track1->GetSigmaY(i))*(track1->GetDy(i)/track1->GetSigmaY(i))+
2524 (track1->GetDz(i)/track1->GetSigmaZ(i))*(track1->GetDz(i)/track1->GetSigmaZ(i));
e43c066c 2525 //chi21 = (track1->fDy[i]*track1->fDy[i])/(nerry[i]*nerry[i])+
b9671574 2526 // (track1->GetDz(i)*track1->GetDz(i))/(nerrz[i]*nerrz[i]);
e43c066c 2527 }else{
b9671574 2528 if (TMath::Abs(track1->GetSigmaY(i)>0.)) c1=1;
e43c066c 2529 }
2530 //
b9671574 2531 if (TMath::Abs(track2->GetDy(i))>0.) {
2532 chi22 = (track2->GetDy(i)/track2->GetSigmaY(i))*(track2->GetDy(i)/track2->GetSigmaY(i))+
2533 (track2->GetDz(i)/track2->GetSigmaZ(i))*(track2->GetDz(i)/track2->GetSigmaZ(i));
e43c066c 2534 //chi22 = (track2->fDy[i]*track2->fDy[i])/(nerry[i]*nerry[i])+
2535 // (track2->fDz[i]*track2->fDz[i])/(nerrz[i]*nerrz[i]);
2536 }
2537 else{
b9671574 2538 if (TMath::Abs(track2->GetSigmaY(i)>0.)) c2=1;
e43c066c 2539 }
2540 sumchi2+=w1*(1.+c1)*(1+c1)*(chi21+c1)+w2*(1.+c2)*(1+c2)*(chi22+c2);
2541 if (chi21>0) sum+=w1;
2542 if (chi22>0) sum+=w2;
2543 conflict+=(c1+c2);
2544 }
b9671574 2545 Double_t norm = sum-w1*track1->GetNSkipped()-w2*track2->GetNSkipped();
2546 if (norm<0) norm =1/(w1*track1->GetNSkipped()+w2*track2->GetNSkipped());
e43c066c 2547 Double_t normchi2 = 2*conflict+sumchi2/sum;
2548 if ( normchi2 <maxchi2 ){
2549 index1 = itrack1;
2550 index2 = itrack2;
2551 maxconflicts = conflict;
2552 maxchi2 = normchi2;
2553 }
2554 }
2555 UnRegisterClusterTracks(track1,trackID1);
2556 }
2557 //
2558 // if (maxconflicts<4 && maxchi2<th0){
2559 if (maxchi2<th0*2.){
b9671574 2560 Float_t orig = track10->GetFakeRatio()*track10->GetNumberOfClusters();
15dd636f 2561 AliITStrackMI* track1=(AliITStrackMI*) arr1->UncheckedAt(index1);
b9671574 2562 track1->SetChi2MIP(5,maxconflicts);
2563 track1->SetChi2MIP(6,maxchi2);
2564 track1->SetChi2MIP(7,0.01+orig-(track1->GetFakeRatio()*track1->GetNumberOfClusters()));
e43c066c 2565 // track1->UpdateESDtrack(AliESDtrack::kITSin);
b9671574 2566 track1->SetChi2MIP(8,index1);
e43c066c 2567 fBestTrackIndex[trackID1] =index1;
2568 UpdateESDtrack(track1, AliESDtrack::kITSin);
2569 }
b9671574 2570 else if (track10->GetChi2MIP(0)<th1){
2571 track10->SetChi2MIP(5,maxconflicts);
2572 track10->SetChi2MIP(6,maxchi2);
e43c066c 2573 // track10->UpdateESDtrack(AliESDtrack::kITSin);
2574 UpdateESDtrack(track10,AliESDtrack::kITSin);
2575 }
2576
2577 for (Int_t itrack=0;itrack<entries1;itrack++){
15dd636f 2578 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
e43c066c 2579 UnRegisterClusterTracks(track,trackID1);
2580 }
2581 //
2582 for (Int_t itrack=0;itrack<entries2;itrack++){
15dd636f 2583 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
e43c066c 2584 UnRegisterClusterTracks(track,trackID2);
2585 }
2586
b9671574 2587 if (track10->GetConstrain()&&track10->GetChi2MIP(0)<kMaxChi2PerCluster[0]&&track10->GetChi2MIP(1)<kMaxChi2PerCluster[1]
2588 &&track10->GetChi2MIP(2)<kMaxChi2PerCluster[2]&&track10->GetChi2MIP(3)<kMaxChi2PerCluster[3]){
e43c066c 2589 // if (track10->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track10->fChi2MIP[1]<kMaxChi2PerCluster[1]
2590 // &&track10->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track10->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2591 RegisterClusterTracks(track10,trackID1);
2592 }
b9671574 2593 if (track20->GetConstrain()&&track20->GetChi2MIP(0)<kMaxChi2PerCluster[0]&&track20->GetChi2MIP(1)<kMaxChi2PerCluster[1]
2594 &&track20->GetChi2MIP(2)<kMaxChi2PerCluster[2]&&track20->GetChi2MIP(3)<kMaxChi2PerCluster[3]){
e43c066c 2595 //if (track20->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track20->fChi2MIP[1]<kMaxChi2PerCluster[1]
2596 // &&track20->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track20->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2597 RegisterClusterTracks(track20,trackID2);
2598 }
2599 return track10;
2600
2601}
2602
2603void AliITStrackerMI::UseClusters(const AliKalmanTrack *t, Int_t from) const {
2604 //--------------------------------------------------------------------
2605 // This function marks clusters assigned to the track
2606 //--------------------------------------------------------------------
2607 AliTracker::UseClusters(t,from);
2608
00a7cc50 2609 AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(0));
e43c066c 2610 //if (c->GetQ()>2) c->Use();
2611 if (c->GetSigmaZ2()>0.1) c->Use();
00a7cc50 2612 c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(1));
e43c066c 2613 //if (c->GetQ()>2) c->Use();
2614 if (c->GetSigmaZ2()>0.1) c->Use();
2615
2616}
2617
2618
15dd636f 2619void AliITStrackerMI::AddTrackHypothesys(AliITStrackMI * track, Int_t esdindex)
e43c066c 2620{
2621 //------------------------------------------------------------------
2622 // add track to the list of hypothesys
2623 //------------------------------------------------------------------
2624
2625 if (esdindex>=fTrackHypothesys.GetEntriesFast()) fTrackHypothesys.Expand(esdindex*2+10);
2626 //
2627 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2628 if (!array) {
2629 array = new TObjArray(10);
2630 fTrackHypothesys.AddAt(array,esdindex);
2631 }
2632 array->AddLast(track);
2633}
2634
2635void AliITStrackerMI::SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode)
2636{
2637 //-------------------------------------------------------------------
2638 // compress array of track hypothesys
2639 // keep only maxsize best hypothesys
2640 //-------------------------------------------------------------------
2641 if (esdindex>fTrackHypothesys.GetEntriesFast()) return;
2642 if (! (fTrackHypothesys.At(esdindex)) ) return;
2643 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2644 Int_t entries = array->GetEntriesFast();
2645 //
2646 //- find preliminary besttrack as a reference
2647 Float_t minchi2=10000;
2648 Int_t maxn=0;
15dd636f 2649 AliITStrackMI * besttrack=0;
e43c066c 2650 for (Int_t itrack=0;itrack<array->GetEntriesFast();itrack++){
15dd636f 2651 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2652 if (!track) continue;
2653 Float_t chi2 = NormalizedChi2(track,0);
2654 //
b9671574 2655 Int_t tpcLabel=track->GetESDtrack()->GetTPCLabel();
e43c066c 2656 track->SetLabel(tpcLabel);
2657 CookdEdx(track);
b9671574 2658 track->SetFakeRatio(1.);
e43c066c 2659 CookLabel(track,0.); //For comparison only
2660 //
2661 //if (chi2<kMaxChi2PerCluster[0]&&track->fFakeRatio==0){
2662 if (chi2<kMaxChi2PerCluster[0]){
2663 if (track->GetNumberOfClusters()<maxn) continue;
2664 maxn = track->GetNumberOfClusters();
2665 if (chi2<minchi2){
2666 minchi2=chi2;
2667 besttrack=track;
2668 }
2669 }
2670 else{
b9671574 2671 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
628e7bb0 2672 delete array->RemoveAt(itrack);
2673 }
e43c066c 2674 }
2675 }
2676 if (!besttrack) return;
2677 //
2678 //
2679 //take errors of best track as a reference
2680 Float_t *erry = GetErrY(esdindex), *errz = GetErrZ(esdindex);
2681 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
2682 for (Int_t i=0;i<6;i++) {
b9671574 2683 if (besttrack->GetClIndex(i)>0){
2684 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2685 errz[i] = besttrack->GetSigmaZ(i); errz[i+6] = besttrack->GetSigmaZ(i+6);
2686 ny[i] = besttrack->GetNy(i);
2687 nz[i] = besttrack->GetNz(i);
e43c066c 2688 }
2689 }
2690 //
2691 // calculate normalized chi2
2692 //
2693 Float_t * chi2 = new Float_t[entries];
2694 Int_t * index = new Int_t[entries];
2695 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2696 for (Int_t itrack=0;itrack<entries;itrack++){
15dd636f 2697 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2698 if (track){
b9671574 2699 track->SetChi2MIP(0,GetNormalizedChi2(track, mode));
2700 if (track->GetChi2MIP(0)<kMaxChi2PerCluster[0])
2701 chi2[itrack] = track->GetChi2MIP(0);
628e7bb0 2702 else{
b9671574 2703 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
628e7bb0 2704 delete array->RemoveAt(itrack);
2705 }
2706 }
e43c066c 2707 }
2708 }
2709 //
2710 TMath::Sort(entries,chi2,index,kFALSE);
15dd636f 2711 besttrack = (AliITStrackMI*)array->At(index[0]);
b9671574 2712 if (besttrack&&besttrack->GetChi2MIP(0)<kMaxChi2PerCluster[0]){
e43c066c 2713 for (Int_t i=0;i<6;i++){
b9671574 2714 if (besttrack->GetClIndex(i)>0){
2715 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2716 errz[i] = besttrack->GetSigmaZ(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2717 ny[i] = besttrack->GetNy(i);
2718 nz[i] = besttrack->GetNz(i);
e43c066c 2719 }
2720 }
2721 }
2722 //
2723 // calculate one more time with updated normalized errors
2724 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2725 for (Int_t itrack=0;itrack<entries;itrack++){
15dd636f 2726 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2727 if (track){
b9671574 2728 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
2729 if (track->GetChi2MIP(0)<kMaxChi2PerCluster[0])
2730 chi2[itrack] = track->GetChi2MIP(0)-0*(track->GetNumberOfClusters()+track->GetNDeadZone());
628e7bb0 2731 else
2732 {
b9671574 2733 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
628e7bb0 2734 delete array->RemoveAt(itrack);
2735 }
2736 }
e43c066c 2737 }
2738 }
2739 entries = array->GetEntriesFast();
2740 //
628e7bb0 2741 //
e43c066c 2742 if (entries>0){
2743 TObjArray * newarray = new TObjArray();
2744 TMath::Sort(entries,chi2,index,kFALSE);
15dd636f 2745 besttrack = (AliITStrackMI*)array->At(index[0]);
e43c066c 2746 if (besttrack){
2747 //
2748 for (Int_t i=0;i<6;i++){
b9671574 2749 if (besttrack->GetNz(i)>0&&besttrack->GetNy(i)>0){
2750 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2751 errz[i] = besttrack->GetSigmaZ(i); errz[i+6] = besttrack->GetSigmaZ(i+6);
2752 ny[i] = besttrack->GetNy(i);
2753 nz[i] = besttrack->GetNz(i);
e43c066c 2754 }
2755 }
b9671574 2756 besttrack->SetChi2MIP(0,GetNormalizedChi2(besttrack,mode));
2757 Float_t minchi2 = TMath::Min(besttrack->GetChi2MIP(0)+5.+besttrack->GetNUsed(), double(kMaxChi2PerCluster[0]));
e43c066c 2758 Float_t minn = besttrack->GetNumberOfClusters()-3;
2759 Int_t accepted=0;
2760 for (Int_t i=0;i<entries;i++){
15dd636f 2761 AliITStrackMI * track = (AliITStrackMI*)array->At(index[i]);
e43c066c 2762 if (!track) continue;
2763 if (accepted>maxcut) break;
b9671574 2764 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
2765 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
2766 if (track->GetNumberOfClusters()<6 && (track->GetChi2MIP(0)+track->GetNUsed()>minchi2)){
628e7bb0 2767 delete array->RemoveAt(index[i]);
2768 continue;
2769 }
e43c066c 2770 }
b9671574 2771 Bool_t shortbest = !track->GetConstrain() && track->GetNumberOfClusters()<6;
2772 if ((track->GetChi2MIP(0)+track->GetNUsed()<minchi2 && track->GetNumberOfClusters()>=minn) ||shortbest){
628e7bb0 2773 if (!shortbest) accepted++;
e43c066c 2774 //
2775 newarray->AddLast(array->RemoveAt(index[i]));
2776 for (Int_t i=0;i<6;i++){
2777 if (nz[i]==0){
b9671574 2778 erry[i] = track->GetSigmaY(i); erry[i+6] = track->GetSigmaY(i+6);
2779 errz[i] = track->GetSigmaZ(i); errz[i] = track->GetSigmaZ(i+6);
2780 ny[i] = track->GetNy(i);
2781 nz[i] = track->GetNz(i);
e43c066c 2782 }
2783 }
2784 }
2785 else{
2786 delete array->RemoveAt(index[i]);
2787 }
2788 }
2789 array->Delete();
2790 delete fTrackHypothesys.RemoveAt(esdindex);
2791 fTrackHypothesys.AddAt(newarray,esdindex);
2792 }
2793 else{
2794 array->Delete();
2795 delete fTrackHypothesys.RemoveAt(esdindex);
2796 }
2797 }
2798 delete [] chi2;
2799 delete [] index;
2800}
2801
2802
2803
15dd636f 2804AliITStrackMI * AliITStrackerMI::GetBestHypothesys(Int_t esdindex, AliITStrackMI * original, Int_t checkmax)
e43c066c 2805{
2806 //-------------------------------------------------------------
2807 // try to find best hypothesy
2808 // currently - minimal chi2 of track+backpropagated track+matching to the tpc track
2809 //-------------------------------------------------------------
2810 if (fTrackHypothesys.GetEntriesFast()<=esdindex) return 0;
2811 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2812 if (!array) return 0;
2813 Int_t entries = array->GetEntriesFast();
2814 if (!entries) return 0;
2815 Float_t minchi2 = 100000;
15dd636f 2816 AliITStrackMI * besttrack=0;
e43c066c 2817 //
15dd636f 2818 AliITStrackMI * backtrack = new AliITStrackMI(*original);
2819 AliITStrackMI * forwardtrack = new AliITStrackMI(*original);
628e7bb0 2820 Double_t xyzv[]={GetX(),GetY(),GetZ()};
2821 Double_t ersv[]={GetSigmaX()/3.,GetSigmaY()/3.,GetSigmaZ()/3.};
e43c066c 2822 //
2823 for (Int_t i=0;i<entries;i++){
15dd636f 2824 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
e43c066c 2825 if (!track) continue;
628e7bb0 2826 Float_t sigmarfi,sigmaz;
2827 GetDCASigma(track,sigmarfi,sigmaz);
b9671574 2828 track->SetDnorm(0,sigmarfi);
2829 track->SetDnorm(1,sigmaz);
628e7bb0 2830 //
b9671574 2831 track->SetChi2MIP(1,1000000);
2832 track->SetChi2MIP(2,1000000);
2833 track->SetChi2MIP(3,1000000);
e43c066c 2834 //
2835 // backtrack
15dd636f 2836 backtrack = new(backtrack) AliITStrackMI(*track);
b9671574 2837 if (track->GetConstrain()){
628e7bb0 2838 if (!backtrack->PropagateTo(3.,0.0028,65.19)) continue;
2839 if (!backtrack->Improve(0,xyzv,ersv)) continue;
6c94f330 2840 //if (!backtrack->PropagateTo(2.,0.0028,0)) continue; // This
2841 //if (!backtrack->Improve(0,xyzv,ersv)) continue; // is
2842 //if (!backtrack->PropagateTo(1.,0.0028,0)) continue; // an over-kill
2843 //if (!backtrack->Improve(0,xyzv,ersv)) continue; // (I.B.)
2844 //if (!backtrack->PropagateToVertex()) continue; //
2845 backtrack->ResetCovariance(10.);
2846 //if (!backtrack->Improve(0,xyzv,ersv)) continue;
628e7bb0 2847 }else{
6c94f330 2848 backtrack->ResetCovariance(10.);
628e7bb0 2849 }
e43c066c 2850 backtrack->ResetClusters();
628e7bb0 2851
e43c066c 2852 Double_t x = original->GetX();
2853 if (!RefitAt(x,backtrack,track)) continue;
628e7bb0 2854 //
b9671574 2855 track->SetChi2MIP(1,NormalizedChi2(backtrack,0));
e43c066c 2856 //for (Int_t i=2;i<6;i++){track->fDy[i]+=backtrack->fDy[i]; track->fDz[i]+=backtrack->fDz[i];}
b9671574 2857 if (track->GetChi2MIP(1)>kMaxChi2PerCluster[1]*6.) continue;
2858 track->SetChi22(GetMatchingChi2(backtrack,original));
e43c066c 2859
b9671574 2860 if ((track->GetConstrain()) && track->GetChi22()>90.) continue;
2861 if ((!track->GetConstrain()) && track->GetChi22()>30.) continue;
2862 if ( track->GetChi22()/track->GetNumberOfClusters()>11.) continue;
e43c066c 2863
2864
b9671574 2865 if (!(track->GetConstrain())&&track->GetChi2MIP(1)>kMaxChi2PerCluster[1]) continue;
e43c066c 2866 Bool_t isOK=kTRUE;
e43c066c 2867 if(!isOK) continue;
2868 //
2869 //forward track - without constraint
15dd636f 2870 forwardtrack = new(forwardtrack) AliITStrackMI(*original);
e43c066c 2871 forwardtrack->ResetClusters();
2872 x = track->GetX();
628e7bb0 2873 RefitAt(x,forwardtrack,track);
b9671574 2874 track->SetChi2MIP(2,NormalizedChi2(forwardtrack,0));
2875 if (track->GetChi2MIP(2)>kMaxChi2PerCluster[2]*6.0) continue;
2876 if (!(track->GetConstrain())&&track->GetChi2MIP(2)>kMaxChi2PerCluster[2]) continue;
e43c066c 2877
791f9a2a 2878 //track->fD[0] = forwardtrack->GetD(GetX(),GetY());
2879 //track->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
b9671574 2880 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),track->GetDP()); //I.B.
2881 forwardtrack->SetD(0,track->GetD(0));
2882 forwardtrack->SetD(1,track->GetD(1));
e43c066c 2883 {
2884 Int_t list[6];
00a7cc50 2885 AliITSRecPoint* clist[6];
b9671574 2886 track->SetChi2MIP(4,GetNumberOfSharedClusters(track,esdindex,list,clist));
2887 if ( (!track->GetConstrain()) && track->GetChi2MIP(4)>1.0) continue;
e43c066c 2888 }
2889
b9671574 2890 track->SetChi2MIP(3,GetInterpolatedChi2(forwardtrack,backtrack));
2891 if ( (track->GetChi2MIP(3)>6.*kMaxChi2PerCluster[3])) continue;
2892 if ( (!track->GetConstrain()) && (track->GetChi2MIP(3)>2*kMaxChi2PerCluster[3])) {
2893 track->SetChi2MIP(3,1000);
e43c066c 2894 continue;
2895 }
b9671574 2896 Double_t chi2 = track->GetChi2MIP(0)+track->GetNUsed();
e43c066c 2897 //
2898 for (Int_t ichi=0;ichi<5;ichi++){
b9671574 2899 forwardtrack->SetChi2MIP(ichi, track->GetChi2MIP(ichi));
e43c066c 2900 }
2901 if (chi2 < minchi2){
15dd636f 2902 //besttrack = new AliITStrackMI(*forwardtrack);
99c2ee26 2903 besttrack = track;
e43c066c 2904 besttrack->SetLabel(track->GetLabel());
b9671574 2905 besttrack->SetFakeRatio(track->GetFakeRatio());
e43c066c 2906 minchi2 = chi2;
791f9a2a 2907 //original->fD[0] = forwardtrack->GetD(GetX(),GetY());
2908 //original->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
b9671574 2909 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),original->GetDP()); //I.B.
e43c066c 2910 }
2911 }
2912 delete backtrack;
2913 delete forwardtrack;
2914 Int_t accepted=0;
2915 for (Int_t i=0;i<entries;i++){
15dd636f 2916 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
e43c066c 2917 if (!track) continue;
628e7bb0 2918
b9671574 2919 if (accepted>checkmax || track->GetChi2MIP(3)>kMaxChi2PerCluster[3]*6. ||
e43c066c 2920 (track->GetNumberOfClusters()<besttrack->GetNumberOfClusters()-1.)||
b9671574 2921 track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*besttrack->GetNUsed()+3.){
2922 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
628e7bb0 2923 delete array->RemoveAt(i);
2924 continue;
2925 }
e43c066c 2926 }
2927 else{
2928 accepted++;
2929 }
2930 }
2931 //
2932 array->Compress();
2933 SortTrackHypothesys(esdindex,checkmax,1);
2934 array = (TObjArray*) fTrackHypothesys.At(esdindex);
afdf9b9c 2935 if (!array) return 0; // PH What can be the reason? Check SortTrackHypothesys
15dd636f 2936 besttrack = (AliITStrackMI*)array->At(0);
e43c066c 2937 if (!besttrack) return 0;
b9671574 2938 besttrack->SetChi2MIP(8,0);
e43c066c 2939 fBestTrackIndex[esdindex]=0;
2940 entries = array->GetEntriesFast();
15dd636f 2941 AliITStrackMI *longtrack =0;
e43c066c 2942 minchi2 =1000;
b9671574 2943 Float_t minn=besttrack->GetNumberOfClusters()+besttrack->GetNDeadZone();
e43c066c 2944 for (Int_t itrack=entries-1;itrack>0;itrack--){
15dd636f 2945 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
b9671574 2946 if (!track->GetConstrain()) continue;
2947 if (track->GetNumberOfClusters()+track->GetNDeadZone()<minn) continue;
2948 if (track->GetChi2MIP(0)-besttrack->GetChi2MIP(0)>0.0) continue;
2949 if (track->GetChi2MIP(0)>4.) continue;
2950 minn = track->GetNumberOfClusters()+track->GetNDeadZone();
e43c066c 2951 longtrack =track;
2952 }
2953 //if (longtrack) besttrack=longtrack;
2954
2955 Int_t list[6];
00a7cc50 2956 AliITSRecPoint * clist[6];
e43c066c 2957 Float_t shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
b9671574 2958 if (besttrack->GetConstrain()&&besttrack->GetChi2MIP(0)<kMaxChi2PerCluster[0]&&besttrack->GetChi2MIP(1)<kMaxChi2PerCluster[1]
2959 &&besttrack->GetChi2MIP(2)<kMaxChi2PerCluster[2]&&besttrack->GetChi2MIP(3)<kMaxChi2PerCluster[3]){
e43c066c 2960 RegisterClusterTracks(besttrack,esdindex);
2961 }
2962 //
2963 //
2964 if (shared>0.0){
2965 Int_t nshared;
2966 Int_t overlist[6];
2967 Int_t sharedtrack = GetOverlapTrack(besttrack, esdindex, nshared, list, overlist);
2968 if (sharedtrack>=0){
2969 //
2970 besttrack = GetBest2Tracks(esdindex,sharedtrack,10,5.5);
2971 if (besttrack){
2972 shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
2973 }
2974 else return 0;
2975 }
2976 }
2977
2978 if (shared>2.5) return 0;
2979 if (shared>1.0) return besttrack;
2980 //
628e7bb0 2981 // Don't sign clusters if not gold track
2982 //
2983 if (!besttrack->IsGoldPrimary()) return besttrack;
b9671574 2984 if (besttrack->GetESDtrack()->GetKinkIndex(0)!=0) return besttrack; //track belong to kink
628e7bb0 2985 //
e43c066c 2986 if (fConstraint[fPass]){
2987 //
2988 // sign clusters
2989 //
2990 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
2991 for (Int_t i=0;i<6;i++){
b9671574 2992 Int_t index = besttrack->GetClIndex(i);
e43c066c 2993 if (index<=0) continue;
2994 Int_t ilayer = (index & 0xf0000000) >> 28;
b9671574 2995 if (besttrack->GetSigmaY(ilayer)<0.00000000001) continue;
00a7cc50 2996 AliITSRecPoint *c = (AliITSRecPoint*)GetCluster(index);
e43c066c 2997 if (!c) continue;
2998 if (ilayer>3&&c->GetNy()+c->GetNz()>6) continue;
2999 if ( (c->GetNy()+c->GetNz() )> ny[i]+nz[i]+0.7) continue; //shared track
3000 if ( c->GetNz()> nz[i]+0.7) continue; //shared track
b9671574 3001 if ( ilayer>2&& besttrack->GetNormQ(ilayer)/besttrack->GetExpQ()>1.5) continue;
e43c066c 3002 //if ( c->GetNy()> ny[i]+0.7) continue; //shared track
3003
3004 Bool_t cansign = kTRUE;
3005 for (Int_t itrack=0;itrack<entries; itrack++){
15dd636f 3006 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
e43c066c 3007 if (!track) continue;
b9671574 3008 if (track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*shared+1.) break;
3009 if ( (track->GetClIndex(ilayer)>0) && (track->GetClIndex(ilayer)!=besttrack->GetClIndex(ilayer))){
e43c066c 3010 cansign = kFALSE;
3011 break;
3012 }
3013 }
3014 if (cansign){
b9671574 3015 if (TMath::Abs(besttrack->GetDy(ilayer)/besttrack->GetSigmaY(ilayer))>3.) continue;
3016 if (TMath::Abs(besttrack->GetDz(ilayer)/besttrack->GetSigmaZ(ilayer))>3.) continue;
e43c066c 3017 if (!c->IsUsed()) c->Use();
3018 }
3019 }
3020 }
3021 return besttrack;
3022}
3023
3024
3025
3026void AliITStrackerMI::GetBestHypothesysMIP(TObjArray &itsTracks)
3027{
3028 //
3029 // get "best" hypothesys
628e7bb0 3030 //
e43c066c 3031
3032 Int_t nentries = itsTracks.GetEntriesFast();
3033 for (Int_t i=0;i<nentries;i++){
15dd636f 3034 AliITStrackMI* track = (AliITStrackMI*)itsTracks.At(i);
e43c066c 3035 if (!track) continue;
3036 TObjArray * array = (TObjArray*) fTrackHypothesys.At(i);
3037 if (!array) continue;
3038 if (array->GetEntriesFast()<=0) continue;
3039 //
15dd636f 3040 AliITStrackMI* longtrack=0;
e43c066c 3041 Float_t minn=0;
3042 Float_t maxchi2=1000;
3043 for (Int_t j=0;j<array->GetEntriesFast();j++){
15dd636f 3044 AliITStrackMI* track = (AliITStrackMI*)array->At(j);
e43c066c 3045 if (!track) continue;
b9671574 3046 if (track->GetGoldV0()) {
628e7bb0 3047 longtrack = track; //gold V0 track taken
3048 break;
3049 }
b9671574 3050 if (track->GetNumberOfClusters()+track->GetNDeadZone()<minn) continue;
3051 Float_t chi2 = track->GetChi2MIP(0);
628e7bb0 3052 if (fAfterV0){
b9671574 3053 if (!track->GetGoldV0()&&track->GetConstrain()==kFALSE) chi2+=5;
628e7bb0 3054 }
b9671574 3055 if (track->GetNumberOfClusters()+track->GetNDeadZone()>minn) maxchi2 = track->GetChi2MIP(0);
628e7bb0 3056 //
3057 if (chi2 > maxchi2) continue;
b9671574 3058 minn= track->GetNumberOfClusters()+track->GetNDeadZone();
628e7bb0 3059 maxchi2 = chi2;
e43c066c 3060 longtrack=track;
e43c066c 3061 }
628e7bb0 3062 //
3063 //
3064 //
15dd636f 3065 AliITStrackMI * besttrack = (AliITStrackMI*)array->At(0);
e43c066c 3066 if (!longtrack) {longtrack = besttrack;}
3067 else besttrack= longtrack;
628e7bb0 3068 //
e43c066c 3069 if (besttrack){
3070 Int_t list[6];
00a7cc50 3071 AliITSRecPoint * clist[6];
e43c066c 3072 Float_t shared = GetNumberOfSharedClusters(longtrack,i,list,clist);
3073 //
b9671574 3074 track->SetNUsed(shared);
3075 track->SetNSkipped(besttrack->GetNSkipped());
3076 track->SetChi2MIP(0,besttrack->GetChi2MIP(0));
e43c066c 3077 if (shared>0){
3078 Int_t nshared;
3079 Int_t overlist[6];
3080 //
3081 Int_t sharedtrack = GetOverlapTrack(longtrack, i, nshared, list, overlist);
3082 //if (sharedtrack==-1) sharedtrack=0;
3083 if (sharedtrack>=0){
3084 besttrack = GetBest2Tracks(i,sharedtrack,10,5.5);
3085 }
3086 }
628e7bb0 3087 if (besttrack&&fAfterV0){
3088 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3089 }
e43c066c 3090 if (besttrack&&fConstraint[fPass])
3091 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3092 //if (besttrack&&besttrack->fConstrain)
3093 // UpdateESDtrack(besttrack,AliESDtrack::kITSin);
b9671574 3094 if (besttrack->GetChi2MIP(0)+besttrack->GetNUsed()>1.5){
3095 if ( (TMath::Abs(besttrack->GetD(0))>0.1) && fConstraint[fPass]) {
3096 track->SetReconstructed(kFALSE);
e43c066c 3097 }
b9671574 3098 if ( (TMath::Abs(besttrack->GetD(1))>0.1) && fConstraint[fPass]){
3099 track->SetReconstructed(kFALSE);
e43c066c 3100 }
3101 }
3102
3103 }
3104 }
3105}
3106
3107
15dd636f 3108void AliITStrackerMI::CookLabel(AliITStrackMI *track,Float_t wrong) const {
e43c066c 3109 //--------------------------------------------------------------------
3110 //This function "cooks" a track label. If label<0, this track is fake.
3111 //--------------------------------------------------------------------
3112 Int_t tpcLabel=-1;
3113
b9671574 3114 if ( track->GetESDtrack()) tpcLabel = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
e43c066c 3115
b9671574 3116 track->SetChi2MIP(9,0);
e43c066c 3117 Int_t nwrong=0;
3118 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3119 Int_t cindex = track->GetClusterIndex(i);
3120 Int_t l=(cindex & 0xf0000000) >> 28;
00a7cc50 3121 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
e43c066c 3122 Int_t isWrong=1;
3123 for (Int_t ind=0;ind<3;ind++){
3124 if (tpcLabel>0)
3125 if (cl->GetLabel(ind)==tpcLabel) isWrong=0;
3126 }
b9671574 3127 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
e43c066c 3128 nwrong+=isWrong;
3129 }
b9671574 3130 track->SetFakeRatio(double(nwrong)/double(track->GetNumberOfClusters()));
e43c066c 3131 if (tpcLabel>0){
b9671574 3132 if (track->GetFakeRatio()>wrong) track->SetLabel(-tpcLabel);
e43c066c 3133 else
b9671574 3134 track->SetLabel(tpcLabel);
e43c066c 3135 }
3136
3137}
3138
3139
3140
15dd636f 3141void AliITStrackerMI::CookdEdx(AliITStrackMI* track)
e43c066c 3142{
3143 //
3144 //
3145 // Int_t list[6];
00a7cc50 3146 //AliITSRecPoint * clist[6];
e43c066c 3147 // Int_t shared = GetNumberOfSharedClusters(track,index,list,clist);
3148 Float_t dedx[4];
3149 Int_t accepted=0;
b9671574 3150 track->SetChi2MIP(9,0);
e43c066c 3151 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3152 Int_t cindex = track->GetClusterIndex(i);
3153 Int_t l=(cindex & 0xf0000000) >> 28;
00a7cc50 3154 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
b9671574 3155 Int_t lab = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
e43c066c 3156 Int_t isWrong=1;
3157 for (Int_t ind=0;ind<3;ind++){
3158 if (cl->GetLabel(ind)==lab) isWrong=0;
3159 }
b9671574 3160 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
e43c066c 3161 if (l<2) continue;
3162 //if (l>3 && (cl->GetNy()>4) || (cl->GetNz()>4)) continue; //shared track
3163 //if (l>3&& !(cl->GetType()==1||cl->GetType()==10)) continue;
3164 //if (l<4&& !(cl->GetType()==1)) continue;
b9671574 3165 dedx[accepted]= track->GetSampledEdx(i);
e43c066c 3166 //dedx[accepted]= track->fNormQ[l];
3167 accepted++;
3168 }
3169 if (accepted<1) {
3170 track->SetdEdx(0);
3171 return;
3172 }
3173 Int_t indexes[4];
3174 TMath::Sort(accepted,dedx,indexes,kFALSE);
3175 Double_t low=0.;
3176 Double_t up=0.51;
3177 Double_t nl=low*accepted, nu =up*accepted;
3178 Float_t sumamp = 0;
3179 Float_t sumweight =0;
3180 for (Int_t i=0; i<accepted; i++) {
3181 Float_t weight =1;
3182 if (i<nl+0.1) weight = TMath::Max(1.-(nl-i),0.);
3183 if (i>nu-1) weight = TMath::Max(nu-i,0.);
3184 sumamp+= dedx[indexes[i]]*weight;
3185 sumweight+=weight;
3186 }
3187 track->SetdEdx(sumamp/sumweight);
3188}
3189
3190
3191void AliITStrackerMI::MakeCoeficients(Int_t ntracks){
3192 //
3193 //
628e7bb0 3194 if (fCoeficients) delete []fCoeficients;
e43c066c 3195 fCoeficients = new Float_t[ntracks*48];
3196 for (Int_t i=0;i<ntracks*48;i++) fCoeficients[i]=-1.;
3197}
3198
3199
00a7cc50 3200Double_t AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer)
e43c066c 3201{
3202 //
3203 //
3204 //
3205 Float_t erry,errz;
3206 Float_t theta = track->GetTgl();
3207 Float_t phi = track->GetSnp();
3208 phi = TMath::Sqrt(phi*phi/(1.-phi*phi));
b9671574 3209 GetError(layer,cluster,theta,phi,track->GetExpQ(),erry,errz);
e43c066c 3210 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz);
3211 Float_t ny,nz;
3212 GetNTeor(layer,cluster, theta,phi,ny,nz);
3213 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
3214 if (delta>1){
3215 chi2+=0.5*TMath::Min(delta/2,2.);
3216 chi2+=2.*cluster->GetDeltaProbability();
3217 }
3218 //
b9671574 3219 track->SetNy(layer,ny);
3220 track->SetNz(layer,nz);
3221 track->SetSigmaY(layer,erry);
3222 track->SetSigmaZ(layer, errz);
e43c066c 3223 //track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt(1+theta*theta+phi*phi);
b9671574 3224 track->SetNormQ(layer,cluster->GetQ()/TMath::Sqrt((1.+ track->GetTgl()*track->GetTgl())/(1.- track->GetSnp()*track->GetSnp())));
e43c066c 3225 return chi2;
3226
3227}
3228
00a7cc50 3229Int_t AliITStrackerMI::UpdateMI(AliITStrackMI* track, const AliITSRecPoint* cl,Double_t chi2,Int_t index) const
e43c066c 3230{
3231 //
3232 //
3233 //
3234 Int_t layer = (index & 0xf0000000) >> 28;
b9671574 3235 track->SetClIndex(layer, index);
3236 if ( (layer>1) &&track->GetNormQ(layer)/track->GetExpQ()<0.5 ) {
3237 chi2+= (0.5-track->GetNormQ(layer)/track->GetExpQ())*10.;
3238 track->SetdEdxMismatch(track->GetdEdxMismatch()+(0.5-track->GetNormQ(layer)/track->GetExpQ())*10.);
e43c066c 3239 }
b9671574 3240 return track->UpdateMI(cl->GetY(),cl->GetZ(),track->GetSigmaY(layer),track->GetSigmaZ(layer),chi2,index);
e43c066c 3241}
3242
00a7cc50 3243void AliITStrackerMI::GetNTeor(Int_t layer, const AliITSRecPoint* /*cl*/, Float_t theta, Float_t phi, Float_t &ny, Float_t &nz)
e43c066c 3244{
3245 //
3246 //get "mean shape"
3247 //
3248 if (layer==0){
3249 ny = 1.+TMath::Abs(phi)*3.2;
3250 nz = 1.+TMath::Abs(theta)*0.34;
3251 return;
3252 }
3253 if (layer==1){
3254 ny = 1.+TMath::Abs(phi)*3.2;
3255 nz = 1.+TMath::Abs(theta)*0.28;
3256 return;
3257 }
3258
3259 if (layer>3){
3260 ny = 2.02+TMath::Abs(phi)*1.95;
3261 nz = 2.02+TMath::Abs(phi)*2.35;
3262 return;
3263 }
4c53440c 3264 ny = 6.6-2.7*TMath::Abs(phi);
e43c066c 3265 nz = 2.8-3.11*TMath::Abs(phi)+0.45*TMath::Abs(theta);
3266}
3267
3268
3269
00a7cc50 3270Int_t AliITStrackerMI::GetError(Int_t layer, const AliITSRecPoint*cl, Float_t theta, Float_t phi,Float_t expQ, Float_t &erry, Float_t &errz)
e43c066c 3271{
3272 //calculate cluster position error
3273 //
3274 Float_t nz,ny;
3275 GetNTeor(layer, cl,theta,phi,ny,nz);
3276 erry = TMath::Sqrt(cl->GetSigmaY2());
3277 errz = TMath::Sqrt(cl->GetSigmaZ2());
3278 //
3279 // PIXELS
3280 if (layer<2){
3281
3282 if (TMath::Abs(ny-cl->GetNy())>0.6) {
3283 if (ny<cl->GetNy()){
3284 erry*=0.4+TMath::Abs(ny-cl->GetNy());
3285 errz*=0.4+TMath::Abs(ny-cl->GetNy());
3286 }else{
3287 erry*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
3288 errz*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
3289 }
3290 }
3291 if (TMath::Abs(nz-cl->GetNz())>1.) {
3292 erry*=TMath::Abs(nz-cl->GetNz());
3293 errz*=TMath::Abs(nz-cl->GetNz());
3294 }
3295 erry*=0.85;
3296 errz*=0.85;
3297 erry= TMath::Min(erry,float(0.005));
3298 errz= TMath::Min(errz,float(0.03));
3299 return 10;
3300 }
3301
3302//STRIPS
3303 if (layer>3){
1d4090b7 3304 //factor 1.8 appears in new simulation
3305 //
3306 Float_t scale=1.8;
e43c066c 3307 if (cl->GetNy()==100||cl->GetNz()==100){
1d4090b7 3308 erry = 0.004*scale;
3309 errz = 0.2*scale;
e43c066c 3310 return 100;
3311 }
3312 if (cl->GetNy()+cl->GetNz()>12){
1d4090b7 3313 erry = 0.06*scale;
3314 errz = 0.57*scale;
e43c066c 3315 return 100;
3316 }
3317 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
3318 Float_t chargematch = TMath::Max(double(normq/expQ),2.);
3319 //
3320 if (cl->GetType()==1 || cl->GetType()==10 ){
3321 if (chargematch<1.0 || (cl->GetNy()+cl->GetNz()<nz+ny+0.5)){
1d4090b7 3322 errz = 0.043*scale;
3323 erry = 0.00094*scale;
e43c066c 3324 return 101;
3325 }
3326 if (cl->GetNy()+cl->GetNz()<nz+ny+1.2){
1d4090b7 3327 errz = 0.06*scale;
3328 erry =0.0013*scale;
e43c066c 3329 return 102;
3330 }
1d4090b7 3331 erry = 0.0027*scale;
3332 errz = TMath::Min(0.028*(chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.15)*scale;
e43c066c 3333 return 103;
3334 }
3335 if (cl->GetType()==2 || cl->GetType()==11 ){
1d4090b7 3336 erry = TMath::Min(0.0010*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.05)*scale;
3337 errz = TMath::Min(0.025*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.5)*scale;
e43c066c 3338 return 104;
3339 }
3340
3341 if (cl->GetType()>100 ){
3342 if ((chargematch+cl->GetNy()+cl->GetNz()-nz-ny<1.5)){
1d4090b7 3343 errz = 0.05*scale;
3344 erry = 0.00096*scale;
e43c066c 3345 return 105;
3346 }
3347 if (cl->GetNy()+cl->GetNz()-nz-ny<1){
1d4090b7 3348 errz = 0.10*scale;
3349 erry = 0.0025*scale;
e43c066c 3350 return 106;
3351 }
3352
1d4090b7 3353 errz = TMath::Min(0.05*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.4)*scale;
3354 erry = TMath::Min(0.003*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.05)*scale;
e43c066c 3355 return 107;
3356 }
3357 Float_t diff = cl->GetNy()+cl->GetNz()-ny-nz;
3358 if (diff<1) diff=1;
3359 if (diff>4) diff=4;
3360
3361 if (cl->GetType()==5||cl->GetType()==6||cl->GetType()==7||cl->GetType()==8){
3362 errz = 0.14*diff;
3363 erry = 0.003*diff;
3364 return 108;
3365 }
3366 erry = 0.04*diff;
3367 errz = 0.06*diff;
3368 return 109;
3369 }
3370 //DRIFTS
3371 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
3372 Float_t chargematch = normq/expQ;
3373 Float_t factorz=1;
3374 Int_t cnz = cl->GetNz()%10;
3375 //charge match
3376 if (cl->GetType()==1){
3377 if (chargematch<1.25){
3378 erry = 0.0028*(1.+6./cl->GetQ()); // gold clusters
3379 }
3380 else{
3381 erry = 0.003*chargematch;
3382 if (cl->GetNz()==3) erry*=1.5;
3383 }
3384 if (chargematch<1.0){
3385 errz = 0.0011*(1.+6./cl->GetQ());
3386 }
3387 else{
3388 errz = 0.002*(1+2*(chargematch-1.));
3389 }
3390 if (cnz>nz+0.6) {
3391 erry*=(cnz-nz+0.5);
3392 errz*=1.4*(cnz-nz+0.5);
3393 }
3394 }
3395 if (cl->GetType()>1){
3396 if (chargematch<1){
3397 erry = 0.00385*(1.+6./cl->GetQ()); // gold clusters
3398 errz = 0.0016*(1.+6./cl->GetQ());
3399 }
3400 else{
3401 errz = 0.0014*(1+3*(chargematch-1.));
3402 erry = 0.003*(1+3*(chargematch-1.));
3403 }
3404 if (cnz>nz+0.6) {
3405 erry*=(cnz-nz+0.5);
3406 errz*=1.4*(cnz-nz+0.5);
3407 }
3408 }
3409
3410 if (TMath::Abs(cl->GetY())>2.5){
3411 factorz*=1+2*(TMath::Abs(cl->GetY())-2.5);
3412 }
3413 if (TMath::Abs(cl->GetY())<1){
3414 factorz*=1.+0.5*TMath::Abs(TMath::Abs(cl->GetY())-1.);
3415 }
3416 factorz= TMath::Min(factorz,float(4.));
3417 errz*=factorz;
3418
3419 erry= TMath::Min(erry,float(0.05));
3420 errz= TMath::Min(errz,float(0.05));
3421 return 200;
3422}
3423
3424
3425
628e7bb0 3426void AliITStrackerMI::GetDCASigma(AliITStrackMI* track, Float_t & sigmarfi, Float_t &sigmaz)
3427{
3428 //
3429 //DCA sigmas parameterization
3430 //to be paramterized using external parameters in future
3431 //
3432 //
6c94f330 3433 sigmarfi = 0.004+1.4 *TMath::Abs(track->GetC())+332.*track->GetC()*track->GetC();
3434 sigmaz = 0.011+4.37*TMath::Abs(track->GetC());
628e7bb0 3435}
3436
3437
e43c066c 3438void AliITStrackerMI::SignDeltas( TObjArray *ClusterArray, Float_t vz)
3439{
3440 //
3441 //
3442 Int_t entries = ClusterArray->GetEntriesFast();
3443 if (entries<4) return;
00a7cc50 3444 AliITSRecPoint* cluster = (AliITSRecPoint*)ClusterArray->At(0);
e43c066c 3445 Int_t layer = cluster->GetLayer();
3446 if (layer>1) return;
3447 Int_t index[10000];
3448 Int_t ncandidates=0;
3449 Float_t r = (layer>0)? 7:4;
3450 //
3451 for (Int_t i=0;i<entries;i++){
00a7cc50 3452 AliITSRecPoint* cl0 = (AliITSRecPoint*)ClusterArray->At(i);
e43c066c 3453 Float_t nz = 1+TMath::Abs((cl0->GetZ()-vz)/r);
3454 if (cl0->GetNy()+cl0->GetNz()<=5+2*layer+nz) continue;
3455 index[ncandidates] = i; //candidate to belong to delta electron track
3456 ncandidates++;
3457 if (cl0->GetNy()+cl0->GetNz()>9+2*layer+nz) {
3458 cl0->SetDeltaProbability(1);
3459 }
3460 }
3461 //
3462 //
3463 //
3464 for (Int_t i=0;i<ncandidates;i++){
00a7cc50 3465 AliITSRecPoint* cl0 = (AliITSRecPoint*)ClusterArray->At(index[i]);
e43c066c 3466 if (cl0->GetDeltaProbability()>0.8) continue;
3467 //
3468 Int_t ncl = 0;
3469 Float_t y[100],z[100],sumy,sumz,sumy2, sumyz, sumw;
3470 sumy=sumz=sumy2=sumyz=sumw=0.0;
3471 for (Int_t j=0;j<ncandidates;j++){
3472 if (i==j) continue;
00a7cc50 3473 AliITSRecPoint* cl1 = (AliITSRecPoint*)ClusterArray->At(index[j]);
e43c066c 3474 //
3475 Float_t dz = cl0->GetZ()-cl1->GetZ();
3476 Float_t dy = cl0->GetY()-cl1->GetY();
3477 if (TMath::Sqrt(dz*dz+dy*dy)<0.2){
3478 Float_t weight = cl1->GetNy()+cl1->GetNz()-2;
3479 y[ncl] = cl1->GetY();
3480 z[ncl] = cl1->GetZ();
3481 sumy+= y[ncl]*weight;
3482 sumz+= z[ncl]*weight;
3483 sumy2+=y[ncl]*y[ncl]*weight;
3484 sumyz+=y[ncl]*z[ncl]*weight;
3485 sumw+=weight;
3486 ncl++;
3487 }
3488 }
3489 if (ncl<4) continue;
3490 Float_t det = sumw*sumy2 - sumy*sumy;
3491 Float_t delta=1000;
3492 if (TMath::Abs(det)>0.01){
3493 Float_t z0 = (sumy2*sumz - sumy*sumyz)/det;
3494 Float_t k = (sumyz*sumw - sumy*sumz)/det;
3495 delta = TMath::Abs(cl0->GetZ()-(z0+k*cl0->GetY()));
3496 }
3497 else{
3498 Float_t z0 = sumyz/sumy;
3499 delta = TMath::Abs(cl0->GetZ()-z0);
3500 }
3501 if ( delta<0.05) {
3502 cl0->SetDeltaProbability(1-20.*delta);
3503 }
3504 }
3505}
3506
3507
15dd636f 3508void AliITStrackerMI::UpdateESDtrack(AliITStrackMI* track, ULong_t flags) const
e43c066c 3509{
3510 //
3511 //
3512 track->UpdateESDtrack(flags);
b9671574 3513 AliITStrackMI * oldtrack = (AliITStrackMI*)(track->GetESDtrack()->GetITStrack());
99c2ee26 3514 if (oldtrack) delete oldtrack;
b9671574 3515 track->GetESDtrack()->SetITStrack(new AliITStrackMI(*track));
3516 if (TMath::Abs(track->GetDnorm(1))<0.000000001){
628e7bb0 3517 printf("Problem\n");
3518 }
e43c066c 3519}
3520
3521
3522
81e97e0d 3523Int_t AliITStrackerMI::GetNearestLayer(const Double_t *xr) const{
3524 //
3525 //Get nearest upper layer close to the point xr.
3526 // rough approximation
3527 //
bf6adc12 3528 const Float_t kRadiuses[6]={4,6.5,15.03,24.,38.5,43.7};
81e97e0d 3529 Float_t radius = TMath::Sqrt(xr[0]*xr[0]+xr[1]*xr[1]);
3530 Int_t res =6;
3531 for (Int_t i=0;i<6;i++){
bf6adc12 3532 if (radius<kRadiuses[i]){
81e97e0d 3533 res =i;
3534 break;
3535 }
3536 }
3537 return res;
3538}
e43c066c 3539
51ad6848 3540
81e97e0d 3541void AliITStrackerMI::UpdateTPCV0(AliESD *event){
3542 //
3543 //try to update, or reject TPC V0s
3544 //
d6a49f20 3545 Int_t nv0s = event->GetNumberOfV0s();
81e97e0d 3546 Int_t nitstracks = fTrackHypothesys.GetEntriesFast();
51ad6848 3547
81e97e0d 3548 for (Int_t i=0;i<nv0s;i++){
d6a49f20 3549 AliESDv0 * vertex = event->GetV0(i);
81e97e0d 3550 Int_t ip = vertex->GetIndex(0);
3551 Int_t im = vertex->GetIndex(1);
3552 //
3553 TObjArray * arrayp = (ip<nitstracks) ? (TObjArray*)fTrackHypothesys.At(ip):0;
3554 TObjArray * arraym = (im<nitstracks) ? (TObjArray*)fTrackHypothesys.At(im):0;
3555 AliITStrackMI * trackp = (arrayp!=0) ? (AliITStrackMI*)arrayp->At(0):0;
3556 AliITStrackMI * trackm = (arraym!=0) ? (AliITStrackMI*)arraym->At(0):0;
3557 //
3558 //
3559 if (trackp){
b9671574 3560 if (trackp->GetNumberOfClusters()+trackp->GetNDeadZone()>5.5){
3561 if (trackp->GetConstrain()&&trackp->GetChi2MIP(0)<3) vertex->SetStatus(-100);
3562 if (!trackp->GetConstrain()&&trackp->GetChi2MIP(0)<2) vertex->SetStatus(-100);
81e97e0d 3563 }
3564 }
51ad6848 3565
81e97e0d 3566 if (trackm){
b9671574 3567 if (trackm->GetNumberOfClusters()+trackm->GetNDeadZone()>5.5){
3568 if (trackm->GetConstrain()&&trackm->GetChi2MIP(0)<3) vertex->SetStatus(-100);
3569 if (!trackm->GetConstrain()&&trackm->GetChi2MIP(0)<2) vertex->SetStatus(-100);
81e97e0d 3570 }
3571 }
3572 if (vertex->GetStatus()==-100) continue;
3573 //
b75d63a7 3574 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
3575 Int_t clayer = GetNearestLayer(xrp); //I.B.
81e97e0d 3576 vertex->SetNBefore(clayer); //
3577 vertex->SetChi2Before(9*clayer); //
3578 vertex->SetNAfter(6-clayer); //
3579 vertex->SetChi2After(0); //
3580 //
3581 if (clayer >1 ){ // calculate chi2 before vertex
3582 Float_t chi2p = 0, chi2m=0;
3583 //
3584 if (trackp){
3585 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
b9671574 3586 if (trackp->GetClIndex(ilayer)>0){
3587 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+
3588 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));
81e97e0d 3589 }
3590 else{
3591 chi2p+=9;
3592 }
3593 }
3594 }else{
3595 chi2p = 9*clayer;
3596 }
3597 //
3598 if (trackm){
3599 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
b9671574 3600 if (trackm->GetClIndex(ilayer)>0){
3601 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+
3602 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));
81e97e0d 3603 }
3604 else{
3605 chi2m+=9;
3606 }
3607 }
3608 }else{
3609 chi2m = 9*clayer;
3610 }
3611 vertex->SetChi2Before(TMath::Min(chi2p,chi2m));
3612 if (TMath::Min(chi2p,chi2m)/Float_t(clayer)<4) vertex->SetStatus(-10); // track exist before vertex
3613 }
3614
3615 if (clayer < 5 ){ // calculate chi2 after vertex
3616 Float_t chi2p = 0, chi2m=0;
3617 //
6c94f330 3618 if (trackp&&TMath::Abs(trackp->GetTgl())<1.){
81e97e0d 3619 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
b9671574 3620 if (trackp->GetClIndex(ilayer)>0){
3621 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+
3622 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));
81e97e0d 3623 }
3624 else{
3625 chi2p+=9;
3626 }
3627 }
3628 }else{
3629 chi2p = 0;
3630 }
3631 //
6c94f330 3632 if (trackm&&TMath::Abs(trackm->GetTgl())<1.){
81e97e0d 3633 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
b9671574 3634 if (trackm->GetClIndex(ilayer)>0){
3635 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+
3636 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));
81e97e0d 3637 }
3638 else{
3639 chi2m+=9;
3640 }
3641 }
3642 }else{
3643 chi2m = 0;
3644 }
3645 vertex->SetChi2After(TMath::Max(chi2p,chi2m));
3646 if (TMath::Max(chi2m,chi2p)/Float_t(6-clayer)>9) vertex->SetStatus(-20); // track not found in ITS
3647 }
3648 }
3649 //
3650}
51ad6848 3651
67c1e979 3652
3653
81e97e0d 3654void AliITStrackerMI::FindV02(AliESD *event)
e43c066c 3655{
3656 //
81e97e0d 3657 // V0 finder
3658 //
3659 // Cuts on DCA - R dependent
3660 // max distance DCA between 2 tracks cut
3661 // maxDist = TMath::Min(kMaxDist,kMaxDist0+pvertex->GetRr()*kMaxDist);
3662 //
3663 const Float_t kMaxDist0 = 0.1;
3664 const Float_t kMaxDist1 = 0.1;
3665 const Float_t kMaxDist = 1;
3666 const Float_t kMinPointAngle = 0.85;
3667 const Float_t kMinPointAngle2 = 0.99;
3668 const Float_t kMinR = 0.5;
3669 const Float_t kMaxR = 220;
3670 //const Float_t kCausality0Cut = 0.19;
3671 //const Float_t kLikelihood01Cut = 0.25;
3672 //const Float_t kPointAngleCut = 0.9996;
3673 const Float_t kCausality0Cut = 0.19;
3674 const Float_t kLikelihood01Cut = 0.45;
3675 const Float_t kLikelihood1Cut = 0.5;
3676 const Float_t kCombinedCut = 0.55;
3677
3678 //
3679 //
3680 TTreeSRedirector &cstream = *fDebugStreamer;
3681 Int_t ntracks = event->GetNumberOfTracks();
3682 Int_t nitstracks = fTrackHypothesys.GetEntriesFast();
3683 fOriginal.Expand(ntracks);
3684 fTrackHypothesys.Expand(ntracks);
3685 fBestHypothesys.Expand(ntracks);
3686 //
3687 AliHelix * helixes = new AliHelix[ntracks+2];
3688 TObjArray trackarray(ntracks+2); //array with tracks - with vertex constrain
3689 TObjArray trackarrayc(ntracks+2); //array of "best tracks" - without vertex constrain
3690 TObjArray trackarrayl(ntracks+2); //array of "longest tracks" - without vertex constrain
3691 Bool_t * forbidden = new Bool_t [ntracks+2];
3692 Int_t *itsmap = new Int_t [ntracks+2];
3693 Float_t *dist = new Float_t[ntracks+2];
3694 Float_t *normdist0 = new Float_t[ntracks+2];
3695 Float_t *normdist1 = new Float_t[ntracks+2];
3696 Float_t *normdist = new Float_t[ntracks+2];
3697 Float_t *norm = new Float_t[ntracks+2];
3698 Float_t *maxr = new Float_t[ntracks+2];
3699 Float_t *minr = new Float_t[ntracks+2];
3700 Float_t *minPointAngle= new Float_t[ntracks+2];
3701 //
6c94f330 3702 AliV0 *pvertex = new AliV0;
81e97e0d 3703 AliITStrackMI * dummy= new AliITStrackMI;
3704 dummy->SetLabel(0);
3705 AliITStrackMI trackat0; //temporary track for DCA calculation
e43c066c 3706 //
81e97e0d 3707 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
628e7bb0 3708 //
81e97e0d 3709 // make its - esd map
e43c066c 3710 //
81e97e0d 3711 for (Int_t itrack=0;itrack<ntracks+2;itrack++) {
3712 itsmap[itrack] = -1;
3713 forbidden[itrack] = kFALSE;
3714 maxr[itrack] = kMaxR;
3715 minr[itrack] = kMinR;
3716 minPointAngle[itrack] = kMinPointAngle;
3717 }
3718 for (Int_t itrack=0;itrack<nitstracks;itrack++){
3719 AliITStrackMI * original = (AliITStrackMI*)(fOriginal.At(itrack));
b9671574 3720 Int_t esdindex = original->GetESDtrack()->GetID();
81e97e0d 3721 itsmap[esdindex] = itrack;
3722 }
3723 //
3724 // create its tracks from esd tracks if not done before
3725 //
3726 for (Int_t itrack=0;itrack<ntracks;itrack++){
3727 if (itsmap[itrack]>=0) continue;
3728 AliITStrackMI * tpctrack = new AliITStrackMI(*(event->GetTrack(itrack)));
791f9a2a 3729 //tpctrack->fD[0] = tpctrack->GetD(GetX(),GetY());
3730 //tpctrack->fD[1] = tpctrack->GetZat(GetX())-GetZ();
b9671574 3731 tpctrack->GetDZ(GetX(),GetY(),GetZ(),tpctrack->GetDP()); //I.B.
3732 if (tpctrack->GetD(0)<20 && tpctrack->GetD(1)<20){
81e97e0d 3733 // tracks which can reach inner part of ITS
3734 // propagate track to outer its volume - with correction for material
3735 CorrectForDeadZoneMaterial(tpctrack);
3736 }
3737 itsmap[itrack] = nitstracks;
3738 fOriginal.AddAt(tpctrack,nitstracks);
3739 nitstracks++;
3740 }
3741 //
3742 // fill temporary arrays
3743 //
3744 for (Int_t itrack=0;itrack<ntracks;itrack++){
3745 AliESDtrack * esdtrack = event->GetTrack(itrack);
3746 Int_t itsindex = itsmap[itrack];
3747 AliITStrackMI *original = (AliITStrackMI*)fOriginal.At(itsmap[itrack]);
3748 if (!original) continue;
3749 AliITStrackMI *bestConst = 0;
3750 AliITStrackMI *bestLong = 0;
3751 AliITStrackMI *best = 0;
3752 //
628e7bb0 3753 //
81e97e0d 3754 TObjArray * array = (TObjArray*) fTrackHypothesys.At(itsindex);
3755 Int_t hentries = (array==0) ? 0 : array->GetEntriesFast();
3756 // Get best track with vertex constrain
628e7bb0 3757 for (Int_t ih=0;ih<hentries;ih++){
3758 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
b9671574 3759 if (!trackh->GetConstrain()) continue;
81e97e0d 3760 if (!bestConst) bestConst = trackh;
b9671574 3761 if (trackh->GetNumberOfClusters()>5.0){
81e97e0d 3762 bestConst = trackh; // full track - with minimal chi2
3763 break;
3764 }
b9671574 3765 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()) continue;
81e97e0d 3766 bestConst = trackh;
628e7bb0 3767 break;
81e97e0d 3768 }
3769 // Get best long track without vertex constrain and best track without vertex constrain
628e7bb0 3770 for (Int_t ih=0;ih<hentries;ih++){
3771 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
b9671574 3772 if (trackh->GetConstrain()) continue;
81e97e0d 3773 if (!best) best = trackh;
3774 if (!bestLong) bestLong = trackh;
b9671574 3775 if (trackh->GetNumberOfClusters()>5.0){
81e97e0d 3776 bestLong = trackh; // full track - with minimal chi2
3777 break;
3778 }
b9671574 3779 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()) continue;
81e97e0d 3780 bestLong = trackh;
628e7bb0 3781 }
81e97e0d 3782 if (!best) {
3783 best = original;
3784 bestLong = original;
628e7bb0 3785 }
6c94f330 3786 //I.B. trackat0 = *bestLong;
420c3064 3787 new (&trackat0) AliITStrackMI(*bestLong);
81e97e0d 3788 Double_t xx,yy,zz,alpha;
3789 bestLong->GetGlobalXYZat(bestLong->GetX(),xx,yy,zz);
3790 alpha = TMath::ATan2(yy,xx);
3791 trackat0.Propagate(alpha,0);
3792 // calculate normalized distances to the vertex
628e7bb0 3793 //
6c94f330 3794 Float_t ptfac = (1.+100.*TMath::Abs(trackat0.GetC()));
b9671574 3795 if ( bestLong->GetNumberOfClusters()>3 ){
6c94f330 3796 dist[itsindex] = trackat0.GetY();
3797 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
3798 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
3799 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
81e97e0d 3800 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
29641977 3801 if (!bestConst){
b9671574 3802 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<6) normdist[itsindex]*=2.;
3803 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<5) normdist[itsindex]*=2.;
3804 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<4) normdist[itsindex]*=2.;
29641977 3805 }else{
b9671574 3806 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<6) normdist[itsindex]*=1.5;
3807 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<5) normdist[itsindex]*=1.5;
29641977 3808 }
81e97e0d 3809 }
3810 else{
b9671574 3811 if (bestConst&&bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5){
3812 dist[itsindex] = bestConst->GetD(0);
3813 norm[itsindex] = bestConst->GetDnorm(0);
3814 normdist0[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
3815 normdist1[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
81e97e0d 3816 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
3817 }else{
6c94f330 3818 dist[itsindex] = trackat0.GetY();
3819 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
3820 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
3821 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
81e97e0d 3822 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
6c94f330 3823 if (TMath::Abs(trackat0.GetTgl())>1.05){
67c1e979 3824 if (normdist[itsindex]<3) forbidden[itsindex]=kTRUE;
3825 if (normdist[itsindex]>3) {
3826 minr[itsindex] = TMath::Max(Float_t(40.),minr[itsindex]);
3827 }
81e97e0d 3828 }
3829 }
3830 }
628e7bb0 3831 //
81e97e0d 3832 //-----------------------------------------------------------
3833 //Forbid primary track candidates -
628e7bb0 3834 //
81e97e0d 3835 //treetr->SetAlias("forbidden0","Tr0.fN<4&&Tr1.fN+Tr1.fNDeadZone>4.5");
3836 //treetr->SetAlias("forbidden1","ND<3&&Tr1.fN+Tr1.fNDeadZone>5.5");
3837 //treetr->SetAlias("forbidden2","ND<2&&Tr1.fClIndex[0]>0&&Tr1.fClIndex[0]>0");
3838 //treetr->SetAlias("forbidden3","ND<1&&Tr1.fClIndex[0]>0");
3839 //treetr->SetAlias("forbidden4","ND<4&&Tr1.fNormChi2[0]<2");
3840 //treetr->SetAlias("forbidden5","ND<5&&Tr1.fNormChi2[0]<1");
3841 //-----------------------------------------------------------
3842 if (bestConst){
b9671574 3843 if (bestLong->GetNumberOfClusters()<4 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5) forbidden[itsindex]=kTRUE;
3844 if (normdist[itsindex]<3 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>5.5) forbidden[itsindex]=kTRUE;
3845 if (normdist[itsindex]<2 && bestConst->GetClIndex(0)>0 && bestConst->GetClIndex(1)>0 ) forbidden[itsindex]=kTRUE;
3846 if (normdist[itsindex]<1 && bestConst->GetClIndex(0)>0) forbidden[itsindex]=kTRUE;
3847 if (normdist[itsindex]<4 && bestConst->GetNormChi2(0)<2) forbidden[itsindex]=kTRUE;
3848 if (normdist[itsindex]<5 && bestConst->GetNormChi2(0)<1) forbidden[itsindex]=kTRUE;
3849 if (bestConst->GetNormChi2(0)<2.5) {
81e97e0d 3850 minPointAngle[itsindex]= 0.9999;
3851 maxr[itsindex] = 10;
628e7bb0 3852 }
e43c066c 3853 }
81e97e0d 3854 //
3855 //forbid daughter kink candidates
3856 //
3857 if (esdtrack->GetKinkIndex(0)>0) forbidden[itsindex] = kTRUE;
3858 Bool_t isElectron = kTRUE;
29641977 3859 Bool_t isProton = kTRUE;
81e97e0d 3860 Double_t pid[5];
3861 esdtrack->GetESDpid(pid);
3862 for (Int_t i=1;i<5;i++){
3863 if (pid[0]<pid[i]) isElectron= kFALSE;
29641977 3864 if (pid[4]<pid[i]) isProton= kFALSE;
81e97e0d 3865 }
3866 if (isElectron){
3867 forbidden[itsindex]=kFALSE;
29641977 3868 normdist[itsindex]*=-1;
3869 }
3870 if (isProton){
3871 if (normdist[itsindex]>2) forbidden[itsindex]=kFALSE;
3872 normdist[itsindex]*=-1;
81e97e0d 3873 }
29641977 3874
81e97e0d 3875 //
3876 // Causality cuts in TPC volume
3877 //
3878 if (esdtrack->GetTPCdensity(0,10) >0.6) maxr[itsindex] = TMath::Min(Float_t(110),maxr[itsindex]);
3879 if (esdtrack->GetTPCdensity(10,30)>0.6) maxr[itsindex] = TMath::Min(Float_t(120),maxr[itsindex]);
3880 if (esdtrack->GetTPCdensity(20,40)>0.6) maxr[itsindex] = TMath::Min(Float_t(130),maxr[itsindex]);
3881 if (esdtrack->GetTPCdensity(30,50)>0.6) maxr[itsindex] = TMath::Min(Float_t(140),maxr[itsindex]);
3882 //
b9671574 3883 if (esdtrack->GetTPCdensity(0,60)<0.4&&bestLong->GetNumberOfClusters()<3) minr[itsindex]=100;
81e97e0d 3884 //
3885 //
29641977 3886 if (kFALSE){
81e97e0d 3887 cstream<<"Track"<<
3888 "Tr0.="<<best<<
3889 "Tr1.="<<((bestConst)? bestConst:dummy)<<
3890 "Tr2.="<<bestLong<<
3891 "Tr3.="<<&trackat0<<
3892 "Esd.="<<esdtrack<<
3893 "Dist="<<dist[itsindex]<<
3894 "ND0="<<normdist0[itsindex]<<
3895 "ND1="<<normdist1[itsindex]<<
3896 "ND="<<normdist[itsindex]<<
3897 "Pz="<<primvertex[2]<<
3898 "Forbid="<<forbidden[itsindex]<<
3899 "\n";
3900 //
3901 }
3902 trackarray.AddAt(best,itsindex);
3903 trackarrayc.AddAt(bestConst,itsindex);
3904 trackarrayl.AddAt(bestLong,itsindex);
3905 new (&helixes[itsindex]) AliHelix(*best);
e43c066c 3906 }
628e7bb0 3907 //
3908 //
81e97e0d 3909 //
3910 // first iterration of V0 finder
3911 //
3912 for (Int_t iesd0=0;iesd0<ntracks;iesd0++){
3913 Int_t itrack0 = itsmap[iesd0];
3914 if (forbidden[itrack0]) continue;
3915 AliITStrackMI * btrack0 = (AliITStrackMI*)trackarray.At(itrack0);
3916 if (!btrack0) continue;
420c3064 3917 if (btrack0->GetSign()>0) continue;
628e7bb0 3918 AliITStrackMI *trackc0 = (AliITStrackMI*)trackarrayc.At(itrack0);
3919 //
81e97e0d 3920 for (Int_t iesd1=0;iesd1<ntracks;iesd1++){
3921 Int_t itrack1 = itsmap[iesd1];
3922 if (forbidden[itrack1]) continue;
3923
3924 AliITStrackMI * btrack1 = (AliITStrackMI*)trackarray.At(itrack1);
3925 if (!btrack1) continue;
420c3064 3926 if (btrack1->GetSign()<0) continue;
81e97e0d 3927 Bool_t isGold = kFALSE;
3928 if (TMath::Abs(TMath::Abs(btrack0->GetLabel())-TMath::Abs(btrack1->GetLabel()))==1){
3929 isGold = kTRUE;
628e7bb0 3930 }
81e97e0d 3931 AliITStrackMI *trackc1 = (AliITStrackMI*)trackarrayc.At(itrack1);
3932 AliHelix &h1 = helixes[itrack0];
3933 AliHelix &h2 = helixes[itrack1];
628e7bb0 3934 //
81e97e0d 3935 // find linear distance
3936 Double_t rmin =0;
628e7bb0 3937 //
51ad6848 3938 //
51ad6848 3939 //
81e97e0d 3940 Double_t phase[2][2],radius[2];
3941 Int_t points = h1.GetRPHIintersections(h2, phase, radius);
3942 if (points==0) continue;
c49fe0bf 3943 Double_t delta[2]={1000000,1000000};
81e97e0d 3944 rmin = radius[0];
3945 h1.ParabolicDCA(h2,phase[0][0],phase[0][1],radius[0],delta[0]);
3946 if (points==2){
3947 if (radius[1]<rmin) rmin = radius[1];
3948 h1.ParabolicDCA(h2,phase[1][0],phase[1][1],radius[1],delta[1]);
3949 }
3950 rmin = TMath::Sqrt(rmin);
3951 Double_t distance = 0;
3952 Double_t radiusC = 0;
3953 Int_t iphase = 0;
c49fe0bf 3954 if (points==1 || delta[0]<delta[1]){
81e97e0d 3955 distance = TMath::Sqrt(delta[0]);
3956 radiusC = TMath::Sqrt(radius[0]);
3957 }else{
3958 distance = TMath::Sqrt(delta[1]);
3959 radiusC = TMath::Sqrt(radius[1]);
3960 iphase=1;
3961 }
3962 if (radiusC<TMath::Max(minr[itrack0],minr[itrack1])) continue;
3963 if (radiusC>TMath::Min(maxr[itrack0],maxr[itrack1])) continue;
3964 Float_t maxDist = TMath::Min(kMaxDist,Float_t(kMaxDist0+radiusC*kMaxDist1));
3965 if (distance>maxDist) continue;
3966 Float_t pointAngle = h1.GetPointAngle(h2,phase[iphase],primvertex);
3967 if (pointAngle<TMath::Max(minPointAngle[itrack0],minPointAngle[itrack1])) continue;
628e7bb0 3968 //
51ad6848 3969 //
81e97e0d 3970 // Double_t distance = TestV0(h1,h2,pvertex,rmin);
51ad6848 3971 //
81e97e0d 3972 // if (distance>maxDist) continue;
3973 // if (pvertex->GetRr()<kMinR) continue;
3974 // if (pvertex->GetRr()>kMaxR) continue;
3975 AliITStrackMI * track0=btrack0;
3976 AliITStrackMI * track1=btrack1;
3977 // if (pvertex->GetRr()<3.5){
3978 if (radiusC<3.5){
3979 //use longest tracks inside the pipe
3980 track0 = (AliITStrackMI*)trackarrayl.At(itrack0);
3981 track1 = (AliITStrackMI*)trackarrayl.At(itrack1);
3982 }
51ad6848 3983 //
3984 //
b75d63a7 3985 pvertex->SetParamN(*track0);
3986 pvertex->SetParamP(*track1);
81e97e0d 3987 pvertex->Update(primvertex);
b9671574 3988 pvertex->SetClusters(track0->ClIndex(),track1->ClIndex()); // register clusters
67c1e979 3989
81e97e0d 3990 if (pvertex->GetRr()<kMinR) continue;
3991 if (pvertex->GetRr()>kMaxR) continue;
b75d63a7 3992 if (pvertex->GetV0CosineOfPointingAngle()<kMinPointAngle) continue;
3993//Bo: if (pvertex->GetDist2()>maxDist) continue;
3994 if (pvertex->GetDcaV0Daughters()>maxDist) continue;
3995//Bo: pvertex->SetLab(0,track0->GetLabel());
3996//Bo: pvertex->SetLab(1,track1->GetLabel());
b9671574 3997 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
3998 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
81e97e0d 3999 //
4000 AliITStrackMI * htrackc0 = trackc0 ? trackc0:dummy;
4001 AliITStrackMI * htrackc1 = trackc1 ? trackc1:dummy;
51ad6848 4002
81e97e0d 4003 //
4004 //
4005 TObjArray * array0b = (TObjArray*)fBestHypothesys.At(itrack0);
6c94f330 4006 if (!array0b&&pvertex->GetRr()<40 && TMath::Abs(track0->GetTgl())<1.1)
81e97e0d 4007 FollowProlongationTree((AliITStrackMI*)fOriginal.At(itrack0),itrack0, kFALSE);
4008 TObjArray * array1b = (TObjArray*)fBestHypothesys.At(itrack1);
6c94f330 4009 if (!array1b&&pvertex->GetRr()<40 && TMath::Abs(track1->GetTgl())<1.1)
81e97e0d 4010 FollowProlongationTree((AliITStrackMI*)fOriginal.At(itrack1),itrack1, kFALSE);
4011 //
4012 AliITStrackMI * track0b = (AliITStrackMI*)fOriginal.At(itrack0);
4013 AliITStrackMI * track1b = (AliITStrackMI*)fOriginal.At(itrack1);
4014 AliITStrackMI * track0l = (AliITStrackMI*)fOriginal.At(itrack0);
4015 AliITStrackMI * track1l = (AliITStrackMI*)fOriginal.At(itrack1);
4016
4017 Float_t minchi2before0=16;
4018 Float_t minchi2before1=16;
4019 Float_t minchi2after0 =16;
4020 Float_t minchi2after1 =16;
b75d63a7 4021 Double_t xrp[3]; pvertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
4022 Int_t maxLayer = GetNearestLayer(xrp); //I.B.
81e97e0d 4023
4024 if (array0b) for (Int_t i=0;i<5;i++){
4025 // best track after vertex
4026 AliITStrackMI * btrack = (AliITStrackMI*)array0b->At(i);
4027 if (!btrack) continue;
b9671574 4028 if (btrack->GetNumberOfClusters()>track0l->GetNumberOfClusters()) track0l = btrack;
29641977 4029 // if (btrack->fX<pvertex->GetRr()-2.-0.5/(0.1+pvertex->GetAnglep()[2])) {
6c94f330 4030 if (btrack->GetX()<pvertex->GetRr()-2.) {
b9671574 4031 if ( (maxLayer>i+2|| (i==0)) && btrack->GetNumberOfClusters()==(6-i)&&i<3){
81e97e0d 4032 Float_t sumchi2= 0;
4033 Float_t sumn = 0;
29641977 4034 if (maxLayer<3){ // take prim vertex as additional measurement
4035 if (normdist[itrack0]>0 && htrackc0){
97f754fa 4036 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack0]*normdist[itrack0],16.);
29641977 4037 }else{
97f754fa 4038 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack0]*normdist[itrack0]+3.),16.);
29641977 4039 }
4040 sumn += 3-maxLayer;
4041 }
81e97e0d 4042 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
97f754fa 4043 sumn+=1.;
b9671574 4044 if (!btrack->GetClIndex(ilayer)){
81e97e0d 4045 sumchi2+=25;
4046 continue;
4047 }else{
b9671574 4048 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
97f754fa 4049 for (Int_t itrack=0;itrack<4;itrack++){
b9671574 4050 if (fgLayers[ilayer].GetClusterTracks(itrack,c)>=0 && fgLayers[ilayer].GetClusterTracks(itrack,c)!=itrack0){
97f754fa 4051 sumchi2+=18.; //shared cluster
4052 break;
4053 }
4054 }
b9671574 4055 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
4056 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
81e97e0d 4057 }
4058 }
4059 sumchi2/=sumn;
4060 if (sumchi2<minchi2before0) minchi2before0=sumchi2;
51ad6848 4061 }
81e97e0d 4062 continue; //safety space - Geo manager will give exact layer
51ad6848 4063 }
81e97e0d 4064 track0b = btrack;
b9671574 4065 minchi2after0 = btrack->GetNormChi2(i);
81e97e0d 4066 break;
4067 }
4068 if (array1b) for (Int_t i=0;i<5;i++){
4069 // best track after vertex
4070 AliITStrackMI * btrack = (AliITStrackMI*)array1b->At(i);
4071 if (!btrack) continue;
b9671574 4072 if (btrack->GetNumberOfClusters()>track1l->GetNumberOfClusters()) track1l = btrack;
29641977 4073 // if (btrack->fX<pvertex->GetRr()-2-0.5/(0.1+pvertex->GetAnglep()[2])){
6c94f330 4074 if (btrack->GetX()<pvertex->GetRr()-2){
b9671574 4075 if ((maxLayer>i+2 || (i==0))&&btrack->GetNumberOfClusters()==(6-i)&&(i<3)){
81e97e0d 4076 Float_t sumchi2= 0;
4077 Float_t sumn = 0;
29641977 4078 if (maxLayer<3){ // take prim vertex as additional measurement
4079 if (normdist[itrack1]>0 && htrackc1){
97f754fa 4080 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack1]*normdist[itrack1],16.);
29641977 4081 }else{
97f754fa 4082 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack1]*normdist[itrack1]+3.),16.);
29641977 4083 }
4084 sumn += 3-maxLayer;
4085 }
81e97e0d 4086 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
4087 sumn+=1.;
b9671574 4088 if (!btrack->GetClIndex(ilayer)){
81e97e0d 4089 sumchi2+=30;
4090 continue;
4091 }else{
b9671574 4092 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
97f754fa 4093 for (Int_t itrack=0;itrack<4;itrack++){
b9671574 4094 if (fgLayers[ilayer].GetClusterTracks(itrack,c)>=0 && fgLayers[ilayer].GetClusterTracks(itrack,c)!=itrack1){
97f754fa 4095 sumchi2+=18.; //shared cluster
4096 break;
4097 }
4098 }
b9671574 4099 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
4100 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
81e97e0d 4101 }
4102 }
4103 sumchi2/=sumn;
4104 if (sumchi2<minchi2before1) minchi2before1=sumchi2;
51ad6848 4105 }
81e97e0d 4106 continue; //safety space - Geo manager will give exact layer
51ad6848 4107 }
81e97e0d 4108 track1b = btrack;
b9671574 4109 minchi2after1 = btrack->GetNormChi2(i);
81e97e0d 4110 break;
e43c066c 4111 }
628e7bb0 4112 //
81e97e0d 4113 // position resolution - used for DCA cut
6c94f330 4114 Float_t sigmad = track0b->GetSigmaY2()+track0b->GetSigmaZ2()+track1b->GetSigmaY2()+track1b->GetSigmaZ2()+
4115 (track0b->GetX()-pvertex->GetRr())*(track0b->GetX()-pvertex->GetRr())*(track0b->GetSigmaSnp2()+track0b->GetSigmaTgl2())+
4116 (track1b->GetX()-pvertex->GetRr())*(track1b->GetX()-pvertex->GetRr())*(track1b->GetSigmaSnp2()+track1b->GetSigmaTgl2());
81e97e0d 4117 sigmad =TMath::Sqrt(sigmad)+0.04;
4118 if (pvertex->GetRr()>50){
4119 Double_t cov0[15],cov1[15];
b9671574 4120 track0b->GetESDtrack()->GetInnerExternalCovariance(cov0);
4121 track1b->GetESDtrack()->GetInnerExternalCovariance(cov1);
81e97e0d 4122 sigmad = cov0[0]+cov0[2]+cov1[0]+cov1[2]+
4123 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov0[5]+cov0[9])+
4124 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov1[5]+cov1[9]);
4125 sigmad =TMath::Sqrt(sigmad)+0.05;
4126 }
4127 //
6c94f330 4128 AliV0 vertex2;
b75d63a7 4129 vertex2.SetParamN(*track0b);
4130 vertex2.SetParamP(*track1b);
81e97e0d 4131 vertex2.Update(primvertex);
b75d63a7 4132 //Bo: if (vertex2.GetDist2()<=pvertex->GetDist2()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
4133 if (vertex2.GetDcaV0Daughters()<=pvertex->GetDcaV0Daughters()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
4134 pvertex->SetParamN(*track0b);
4135 pvertex->SetParamP(*track1b);
81e97e0d 4136 pvertex->Update(primvertex);
b9671574 4137 pvertex->SetClusters(track0b->ClIndex(),track1b->ClIndex()); // register clusters
4138 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
4139 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
81e97e0d 4140 }
4141 pvertex->SetDistSigma(sigmad);
b75d63a7 4142 //Bo: pvertex->SetDistNorm(pvertex->GetDist2()/sigmad);
29641977 4143 pvertex->SetNormDCAPrim(normdist[itrack0],normdist[itrack1]);
628e7bb0 4144 //
81e97e0d 4145 // define likelihhod and causalities
628e7bb0 4146 //
81e97e0d 4147 Float_t pa0=1, pa1=1, pb0=0.26, pb1=0.26;
29641977 4148 if (maxLayer<1){
4149 Float_t fnorm0 = normdist[itrack0];
4150 if (fnorm0<0) fnorm0*=-3;
4151 Float_t fnorm1 = normdist[itrack1];
4152 if (fnorm1<0) fnorm1*=-3;
4153 if (pvertex->GetAnglep()[2]>0.1 || (pvertex->GetRr()<10.5)&& pvertex->GetAnglep()[2]>0.05 || pvertex->GetRr()<3){
4154 pb0 = TMath::Exp(-TMath::Min(fnorm0,Float_t(16.))/12.);
4155 pb1 = TMath::Exp(-TMath::Min(fnorm1,Float_t(16.))/12.);
67c1e979 4156 }
81e97e0d 4157 pvertex->SetChi2Before(normdist[itrack0]);
4158 pvertex->SetChi2After(normdist[itrack1]);
4159 pvertex->SetNAfter(0);
4160 pvertex->SetNBefore(0);
4161 }else{
4162 pvertex->SetChi2Before(minchi2before0);
4163 pvertex->SetChi2After(minchi2before1);
29641977 4164 if (pvertex->GetAnglep()[2]>0.1 || ( pvertex->GetRr()<10.5 && pvertex->GetAnglep()[2]>0.05) || pvertex->GetRr()<3){
4165 pb0 = TMath::Exp(-TMath::Min(minchi2before0,Float_t(16))/12.);
4166 pb1 = TMath::Exp(-TMath::Min(minchi2before1,Float_t(16))/12.);
4167 }
4168 pvertex->SetNAfter(maxLayer);
4169 pvertex->SetNBefore(maxLayer);
628e7bb0 4170 }
81e97e0d 4171 if (pvertex->GetRr()<90){
b9671574 4172 pa0 *= TMath::Min(track0->GetESDtrack()->GetTPCdensity(0,60),Float_t(1.));
4173 pa1 *= TMath::Min(track1->GetESDtrack()->GetTPCdensity(0,60),Float_t(1.));
628e7bb0 4174 }
81e97e0d 4175 if (pvertex->GetRr()<20){
4176 pa0 *= (0.2+TMath::Exp(-TMath::Min(minchi2after0,Float_t(16))/8.))/1.2;
4177 pa1 *= (0.2+TMath::Exp(-TMath::Min(minchi2after1,Float_t(16))/8.))/1.2;
e43c066c 4178 }
628e7bb0 4179 //
81e97e0d 4180 pvertex->SetCausality(pb0,pb1,pa0,pa1);
628e7bb0 4181 //
81e97e0d 4182 // Likelihood calculations - apply cuts
4183 //
4184 Bool_t v0OK = kTRUE;
4185 Float_t p12 = pvertex->GetParamP()->GetParameter()[4]*pvertex->GetParamP()->GetParameter()[4];
b75d63a7 4186 p12 += pvertex->GetParamN()->GetParameter()[4]*pvertex->GetParamN()->GetParameter()[4];
81e97e0d 4187 p12 = TMath::Sqrt(p12); // "mean" momenta
4188 Float_t sigmap0 = 0.0001+0.001/(0.1+pvertex->GetRr());
4189 Float_t sigmap = 0.5*sigmap0*(0.6+0.4*p12); // "resolution: of point angle - as a function of radius and momenta
4190
bf6adc12 4191 Float_t causalityA = (1.0-pvertex->GetCausalityP()[0])*(1.0-pvertex->GetCausalityP()[1]);
4192 Float_t causalityB = TMath::Sqrt(TMath::Min(pvertex->GetCausalityP()[2],Float_t(0.7))*
81e97e0d 4193 TMath::Min(pvertex->GetCausalityP()[3],Float_t(0.7)));
628e7bb0 4194 //
b75d63a7 4195 //Bo: Float_t likelihood0 = (TMath::Exp(-pvertex->GetDistNorm())+0.1) *(pvertex->GetDist2()<0.5)*(pvertex->GetDistNorm()<5);
4196 Float_t lDistNorm = pvertex->GetDcaV0Daughters()/pvertex->GetDistSigma();
4197 Float_t likelihood0 = (TMath::Exp(-lDistNorm)+0.1) *(pvertex->GetDcaV0Daughters()<0.5)*(lDistNorm<5);
4198
4199 Float_t likelihood1 = TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/sigmap)+
4200 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(4.*sigmap))+
4201 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(8.*sigmap))+
4202 0.1*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/0.01);
628e7bb0 4203 //
bf6adc12 4204 if (causalityA<kCausality0Cut) v0OK = kFALSE;
4205 if (TMath::Sqrt(likelihood0*likelihood1)<kLikelihood01Cut) v0OK = kFALSE;
4206 if (likelihood1<kLikelihood1Cut) v0OK = kFALSE;
4207 if (TMath::Power(likelihood0*likelihood1*causalityB,0.33)<kCombinedCut) v0OK = kFALSE;
81e97e0d 4208
628e7bb0 4209 //
628e7bb0 4210 //
67c1e979 4211 if (kFALSE){
81e97e0d 4212 Bool_t gold = TMath::Abs(TMath::Abs(track0->GetLabel())-TMath::Abs(track1->GetLabel()))==1;
4213 cstream<<"It0"<<
4214 "Tr0.="<<track0<< //best without constrain
4215 "Tr1.="<<track1<< //best without constrain
4216 "Tr0B.="<<track0b<< //best without constrain after vertex
4217 "Tr1B.="<<track1b<< //best without constrain after vertex
4218 "Tr0C.="<<htrackc0<< //best with constrain if exist
4219 "Tr1C.="<<htrackc1<< //best with constrain if exist
4220 "Tr0L.="<<track0l<< //longest best
4221 "Tr1L.="<<track1l<< //longest best
b9671574 4222 "Esd0.="<<track0->GetESDtrack()<< // esd track0 params
4223 "Esd1.="<<track1->GetESDtrack()<< // esd track1 params
81e97e0d 4224 "V0.="<<pvertex<< //vertex properties
4225 "V0b.="<<&vertex2<< //vertex properties at "best" track
4226 "ND0="<<normdist[itrack0]<< //normalize distance for track0
4227 "ND1="<<normdist[itrack1]<< //normalize distance for track1
4228 "Gold="<<gold<< //
4229 // "RejectBase="<<rejectBase<< //rejection in First itteration
4230 "OK="<<v0OK<<
4231 "rmin="<<rmin<<
4232 "sigmad="<<sigmad<<
4233 "\n";
4234 }
4235 //if (rejectBase) continue;
628e7bb0 4236 //
81e97e0d 4237 pvertex->SetStatus(0);
4238 // if (rejectBase) {
4239 // pvertex->SetStatus(-100);
4240 //}
b75d63a7 4241 if (pvertex->GetV0CosineOfPointingAngle()>kMinPointAngle2) {
4242 //Bo: pvertex->SetESDindexes(track0->GetESDtrack()->GetID(),track1->GetESDtrack()->GetID());
4243 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());//Bo: consistency 0 for neg
4244 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());//Bo: consistency 1 for pos
67c1e979 4245 if (v0OK){
4246 // AliV0vertex vertexjuri(*track0,*track1);
4247 // vertexjuri.SetESDindexes(track0->fESDtrack->GetID(),track1->fESDtrack->GetID());
4248 // event->AddV0(&vertexjuri);
81e97e0d 4249 pvertex->SetStatus(100);
4250 }
d6a49f20 4251 pvertex->SetOnFlyStatus(kTRUE);
b75d63a7 4252 pvertex->ChangeMassHypothesis(kK0Short);
d6a49f20 4253 event->AddV0(pvertex);
628e7bb0 4254 }
51ad6848 4255 }
4256 }
628e7bb0 4257 //
4258 //
81e97e0d 4259 // delete temporary arrays
4260 //
4261 delete[] minPointAngle;
4262 delete[] maxr;
4263 delete[] minr;
4264 delete[] norm;
4265 delete[] normdist;
4266 delete[] normdist1;
4267 delete[] normdist0;
4268 delete[] dist;
4269 delete[] itsmap;
4270 delete[] helixes;
4271 delete pvertex;
e43c066c 4272}
4273
4274
67c1e979 4275void AliITStrackerMI::RefitV02(AliESD *event)
4276{
4277 //
4278 //try to refit V0s in the third path of the reconstruction
4279 //
4280 TTreeSRedirector &cstream = *fDebugStreamer;
4281 //
d6a49f20 4282 Int_t nv0s = event->GetNumberOfV0s();
67c1e979 4283 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
6c94f330 4284 AliV0 v0temp;
67c1e979 4285 for (Int_t iv0 = 0; iv0<nv0s;iv0++){
d6a49f20 4286 AliV0 * v0mi = (AliV0*)event->GetV0(iv0);
67c1e979 4287 if (!v0mi) continue;
4288 Int_t itrack0 = v0mi->GetIndex(0);
4289 Int_t itrack1 = v0mi->GetIndex(1);
4290 AliESDtrack *esd0 = event->GetTrack(itrack0);
4291 AliESDtrack *esd1 = event->GetTrack(itrack1);
4292 if (!esd0||!esd1) continue;
4293 AliITStrackMI tpc0(*esd0);
4294 AliITStrackMI tpc1(*esd1);
b75d63a7 4295 Double_t x,y,z; v0mi->GetXYZ(x,y,z); //I.B.
4296 Double_t alpha =TMath::ATan2(y,x); //I.B.
67c1e979 4297 if (v0mi->GetRr()>85){
4298 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
b75d63a7 4299 v0temp.SetParamN(tpc0);
4300 v0temp.SetParamP(tpc1);
67c1e979 4301 v0temp.Update(primvertex);
29641977 4302 if (kFALSE) cstream<<"Refit"<<
67c1e979 4303 "V0.="<<v0mi<<
4304 "V0refit.="<<&v0temp<<
4305 "Tr0.="<<&tpc0<<
4306 "Tr1.="<<&tpc1<<
4307 "\n";
b75d63a7 4308 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4309 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4310 v0mi->SetParamN(tpc0);
4311 v0mi->SetParamP(tpc1);
67c1e979 4312 v0mi->Update(primvertex);
4313 }
4314 }
4315 continue;
4316 }
4317 if (v0mi->GetRr()>35){
4318 CorrectForDeadZoneMaterial(&tpc0);
4319 CorrectForDeadZoneMaterial(&tpc1);
4320 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
b75d63a7 4321 v0temp.SetParamN(tpc0);
4322 v0temp.SetParamP(tpc1);
67c1e979 4323 v0temp.Update(primvertex);
29641977 4324 if (kFALSE) cstream<<"Refit"<<
67c1e979 4325 "V0.="<<v0mi<<
4326 "V0refit.="<<&v0temp<<
4327 "Tr0.="<<&tpc0<<
4328 "Tr1.="<<&tpc1<<
4329 "\n";
b75d63a7 4330 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4331 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4332 v0mi->SetParamN(tpc0);
4333 v0mi->SetParamP(tpc1);
67c1e979 4334 v0mi->Update(primvertex);
4335 }
4336 }
4337 continue;
4338 }
4339 CorrectForDeadZoneMaterial(&tpc0);
4340 CorrectForDeadZoneMaterial(&tpc1);
4341 // if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
4342 if (RefitAt(v0mi->GetRr(),&tpc0, v0mi->GetClusters(0)) && RefitAt(v0mi->GetRr(),&tpc1, v0mi->GetClusters(1))){
b75d63a7 4343 v0temp.SetParamN(tpc0);
4344 v0temp.SetParamP(tpc1);
67c1e979 4345 v0temp.Update(primvertex);
29641977 4346 if (kFALSE) cstream<<"Refit"<<
67c1e979 4347 "V0.="<<v0mi<<
4348 "V0refit.="<<&v0temp<<
4349 "Tr0.="<<&tpc0<<
4350 "Tr1.="<<&tpc1<<
4351 "\n";
b75d63a7 4352 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4353 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4354 v0mi->SetParamN(tpc0);
4355 v0mi->SetParamP(tpc1);
67c1e979 4356 v0mi->Update(primvertex);
4357 }
4358 }
4359 }
4360}
e43c066c 4361
51ad6848 4362
4363
4364
4365
4366
4367