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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"
e341247d 36#include "AliITSgeomTGeo.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
1f3e997f 64AliITStrackerMI::AliITStrackerMI(const Char_t *geom) : AliTracker(),
8221b41b 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 //--------------------------------------------------------------------
e341247d 81 if (geom) {
82 AliWarning("\"geom\" is actually a dummy argument !");
83 }
84
628e7bb0 85 fCoeficients = 0;
86 fAfterV0 = kFALSE;
e341247d 87
88 for (Int_t i=1; i<kMaxLayer+1; i++) {
89 Int_t nlad=AliITSgeomTGeo::GetNLadders(i);
90 Int_t ndet=AliITSgeomTGeo::GetNDetectors(i);
91
92 Double_t xyz[3], &x=xyz[0], &y=xyz[1], &z=xyz[2];
93 AliITSgeomTGeo::GetOrigTranslation(i,1,1,xyz);
e43c066c 94 Double_t poff=TMath::ATan2(y,x);
95 Double_t zoff=z;
e341247d 96 Double_t r=TMath::Sqrt(x*x + y*y);
e43c066c 97
e341247d 98 AliITSgeomTGeo::GetOrigTranslation(i,1,2,xyz);
e43c066c 99 r += TMath::Sqrt(x*x + y*y);
e341247d 100 AliITSgeomTGeo::GetOrigTranslation(i,2,1,xyz);
e43c066c 101 r += TMath::Sqrt(x*x + y*y);
e341247d 102 AliITSgeomTGeo::GetOrigTranslation(i,2,2,xyz);
e43c066c 103 r += TMath::Sqrt(x*x + y*y);
104 r*=0.25;
105
106 new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet);
107
108 for (Int_t j=1; j<nlad+1; j++) {
109 for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors
e341247d 110 TGeoHMatrix m; AliITSgeomTGeo::GetOrigMatrix(i,j,k,m);
1f3e997f 111 const TGeoHMatrix *tm=AliITSgeomTGeo::GetTracking2LocalMatrix(i,j,k);
112 m.Multiply(tm);
113 Double_t txyz[3]={0.}, xyz[3]={0.};
114 m.LocalToMaster(txyz,xyz);
115 Double_t r=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
116 Double_t phi=TMath::ATan2(xyz[1],xyz[0]);
e341247d 117
118 if (phi<0) phi+=TMath::TwoPi();
119 else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi();
120
e43c066c 121 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
122 new(&det) AliITSdetector(r,phi);
123 }
124 }
125
126 }
127
128 fI=kMaxLayer;
129
130 fPass=0;
131 fConstraint[0]=1; fConstraint[1]=0;
132
133 Double_t xyz[]={kXV,kYV,kZV}, ers[]={kSigmaXV,kSigmaYV,kSigmaZV};
134 SetVertex(xyz,ers);
135
136 for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=kLayersNotToSkip[i];
137 fLastLayerToTrackTo=kLastLayerToTrackTo;
628e7bb0 138 for (Int_t i=0;i<100000;i++){
139 fBestTrackIndex[i]=0;
140 }
81e97e0d 141 //
142 fDebugStreamer = new TTreeSRedirector("ITSdebug.root");
143
628e7bb0 144}
e43c066c 145
8221b41b 146AliITStrackerMI::AliITStrackerMI(const AliITStrackerMI &tracker):AliTracker(tracker),
147fI(tracker.fI),
148fBestTrack(tracker.fBestTrack),
149fTrackToFollow(tracker.fTrackToFollow),
150fTrackHypothesys(tracker.fTrackHypothesys),
151fBestHypothesys(tracker.fBestHypothesys),
152fOriginal(tracker.fOriginal),
153fCurrentEsdTrack(tracker.fCurrentEsdTrack),
154fPass(tracker.fPass),
155fAfterV0(tracker.fAfterV0),
156fLastLayerToTrackTo(tracker.fLastLayerToTrackTo),
157fCoeficients(tracker.fCoeficients),
158fEsd(tracker.fEsd),
159fDebugStreamer(tracker.fDebugStreamer){
160 //Copy constructor
161}
162
163AliITStrackerMI & AliITStrackerMI::operator=(const AliITStrackerMI &tracker){
164 //Assignment operator
165 this->~AliITStrackerMI();
166 new(this) AliITStrackerMI(tracker);
167 return *this;
168}
169
170
628e7bb0 171AliITStrackerMI::~AliITStrackerMI()
172{
173 //
174 //destructor
175 //
176 if (fCoeficients) delete []fCoeficients;
81e97e0d 177 if (fDebugStreamer) {
178 //fDebugStreamer->Close();
179 delete fDebugStreamer;
180 }
e43c066c 181}
182
183void AliITStrackerMI::SetLayersNotToSkip(Int_t *l) {
184 //--------------------------------------------------------------------
185 //This function set masks of the layers which must be not skipped
186 //--------------------------------------------------------------------
187 for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=l[i];
188}
189
190Int_t AliITStrackerMI::LoadClusters(TTree *cTree) {
191 //--------------------------------------------------------------------
192 //This function loads ITS clusters
193 //--------------------------------------------------------------------
00a7cc50 194 TBranch *branch=cTree->GetBranch("ITSRecPoints");
e43c066c 195 if (!branch) {
196 Error("LoadClusters"," can't get the branch !\n");
197 return 1;
198 }
199
00a7cc50 200 TClonesArray dummy("AliITSRecPoint",10000), *clusters=&dummy;
e43c066c 201 branch->SetAddress(&clusters);
202
203 Int_t j=0;
204 Int_t detector=0;
205 for (Int_t i=0; i<kMaxLayer; i++) {
206 Int_t ndet=fgLayers[i].GetNdetectors();
207 Int_t jmax = j + fgLayers[i].GetNladders()*ndet;
208 for (; j<jmax; j++) {
209 if (!cTree->GetEvent(j)) continue;
210 Int_t ncl=clusters->GetEntriesFast();
211 SignDeltas(clusters,GetZ());
1f3e997f 212
213 //*** The Delta transformation
214 TGeoHMatrix delta;
215 AliITSgeomTGeo::GetTrackingMatrix(j,delta);
216 TGeoHMatrix m;
217 AliITSgeomTGeo::GetOrigMatrix(j,m);
218 delta.MultiplyLeft(&(m.Inverse()));
219 const TGeoHMatrix *tm = AliITSgeomTGeo::GetTracking2LocalMatrix(j);
220 delta.MultiplyLeft(&(tm->Inverse()));
221 //***
222
e43c066c 223 while (ncl--) {
00a7cc50 224 AliITSRecPoint *c=(AliITSRecPoint*)clusters->UncheckedAt(ncl);
a504d56f 225
1f3e997f 226 //*** Shift the cluster to the misaligned position
227 Double_t xyz[3]={c->GetX(),c->GetY(),c->GetZ()};
228 Double_t mxyz[3]={0.};
229
230 delta.LocalToMaster(xyz,mxyz);
231
232 c->SetX(mxyz[0]);
233 c->AliCluster::SetY(mxyz[1]);
234 c->AliCluster::SetZ(mxyz[2]);
235 //***
a504d56f 236
00a7cc50 237 fgLayers[i].InsertCluster(new AliITSRecPoint(*c));
e43c066c 238 }
239 clusters->Delete();
240 //add dead zone virtual "cluster"
241 if (i<2){
242 for (Float_t ydead = 0; ydead < 1.31 ; ydead+=(i+1.)*0.018){
243 Int_t lab[4] = {0,0,0,detector};
244 Int_t info[3] = {0,0,0};
245 Float_t hit[5]={0,0,0.004/12.,0.001/12.,0};
246 if (i==0) hit[0] =ydead-0.4;
247 if (i==1) hit[0]=ydead-3.75;
248 hit[1] =-0.04;
249 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
00a7cc50 250 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
e43c066c 251 hit[1]=-7.05;
252 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
00a7cc50 253 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
e43c066c 254 hit[1]=-7.15;
255 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
00a7cc50 256 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
e43c066c 257 hit[1] =0.06;
258 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
00a7cc50 259 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
e43c066c 260 hit[1]=7.05;
261 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
00a7cc50 262 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
e43c066c 263 hit[1]=7.25;
264 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
00a7cc50 265 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
e43c066c 266 }
267 }
268
269 }
270 //
271 fgLayers[i].ResetRoad(); //road defined by the cluster density
272 fgLayers[i].SortClusters();
273 }
274
275 return 0;
276}
277
278void AliITStrackerMI::UnloadClusters() {
279 //--------------------------------------------------------------------
280 //This function unloads ITS clusters
281 //--------------------------------------------------------------------
282 for (Int_t i=0; i<kMaxLayer; i++) fgLayers[i].ResetClusters();
283}
284
15dd636f 285static Int_t CorrectForDeadZoneMaterial(AliITStrackMI *t) {
e43c066c 286 //--------------------------------------------------------------------
287 // Correction for the material between the TPC and the ITS
288 // (should it belong to the TPC code ?)
289 //--------------------------------------------------------------------
290 Double_t riw=80., diw=0.0053, x0iw=30; // TPC inner wall ?
291 Double_t rcd=61., dcd=0.0053, x0cd=30; // TPC "central drum" ?
292 Double_t yr=12.8, dr=0.03; // rods ?
293 Double_t zm=0.2, dm=0.40; // membrane
294 //Double_t rr=52., dr=0.19, x0r=24., yyr=7.77; //rails
295 Double_t rs=50., ds=0.001; // something belonging to the ITS (screen ?)
296
297 if (t->GetX() > riw) {
298 if (!t->PropagateTo(riw,diw,x0iw)) return 1;
299 if (TMath::Abs(t->GetY())>yr) t->CorrectForMaterial(dr);
300 if (TMath::Abs(t->GetZ())<zm) t->CorrectForMaterial(dm);
301 if (!t->PropagateTo(rcd,dcd,x0cd)) return 1;
302 //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z);
303 //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,dr,x0r);
304 if (!t->PropagateTo(rs,ds)) return 1;
305 } else if (t->GetX() < rs) {
306 if (!t->PropagateTo(rs,-ds)) return 1;
307 //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z);
308 //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,-dr,x0r);
309 if (!t->PropagateTo(rcd,-dcd,x0cd)) return 1;
310 if (!t->PropagateTo(riw+0.001,-diw,x0iw)) return 1;
311 } else {
312 ::Error("CorrectForDeadZoneMaterial","track is already in the dead zone !");
313 return 1;
314 }
315
316 return 0;
317}
318
319Int_t AliITStrackerMI::Clusters2Tracks(AliESD *event) {
320 //--------------------------------------------------------------------
321 // This functions reconstructs ITS tracks
322 // The clusters must be already loaded !
323 //--------------------------------------------------------------------
324 TObjArray itsTracks(15000);
628e7bb0 325 fOriginal.Clear();
81e97e0d 326 fEsd = event; // store pointer to the esd
e43c066c 327 {/* Read ESD tracks */
328 Int_t nentr=event->GetNumberOfTracks();
329 Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr);
330 while (nentr--) {
331 AliESDtrack *esd=event->GetTrack(nentr);
332
333 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue;
334 if (esd->GetStatus()&AliESDtrack::kTPCout) continue;
335 if (esd->GetStatus()&AliESDtrack::kITSin) continue;
51ad6848 336 if (esd->GetKinkIndex(0)>0) continue; //kink daughter
15dd636f 337 AliITStrackMI *t=0;
e43c066c 338 try {
15dd636f 339 t=new AliITStrackMI(*esd);
e43c066c 340 } catch (const Char_t *msg) {
628e7bb0 341 //Warning("Clusters2Tracks",msg);
e43c066c 342 delete t;
343 continue;
344 }
791f9a2a 345 //t->fD[0] = t->GetD(GetX(),GetY());
346 //t->fD[1] = t->GetZat(GetX())-GetZ();
b9671574 347 t->GetDZ(GetX(),GetY(),GetZ(),t->GetDP()); //I.B.
348 Double_t vdist = TMath::Sqrt(t->GetD(0)*t->GetD(0)+t->GetD(1)*t->GetD(1));
628e7bb0 349 if (t->GetMass()<0.13) t->SetMass(0.13957); // MI look to the esd - mass hypothesys !!!!!!!!!!!
e43c066c 350 // write expected q
b9671574 351 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
e43c066c 352
b9671574 353 if (esd->GetV0Index(0)>0 && t->GetD(0)<30){
81e97e0d 354 //track - can be V0 according to TPC
e43c066c 355 }
81e97e0d 356 else{
b9671574 357 if (TMath::Abs(t->GetD(0))>10) {
81e97e0d 358 delete t;
359 continue;
360 }
361
362 if (TMath::Abs(vdist)>20) {
363 delete t;
364 continue;
365 }
366 if (TMath::Abs(1/t->Get1Pt())<0.120) {
367 delete t;
368 continue;
369 }
370
371 if (CorrectForDeadZoneMaterial(t)!=0) {
372 //Warning("Clusters2Tracks",
373 // "failed to correct for the material in the dead zone !\n");
374 delete t;
375 continue;
376 }
e43c066c 377 }
b9671574 378 t->SetReconstructed(kFALSE);
e43c066c 379 itsTracks.AddLast(t);
628e7bb0 380 fOriginal.AddLast(t);
e43c066c 381 }
382 } /* End Read ESD tracks */
383
384 itsTracks.Sort();
628e7bb0 385 fOriginal.Sort();
e43c066c 386 Int_t nentr=itsTracks.GetEntriesFast();
387 fTrackHypothesys.Expand(nentr);
81e97e0d 388 fBestHypothesys.Expand(nentr);
e43c066c 389 MakeCoeficients(nentr);
390 Int_t ntrk=0;
391 for (fPass=0; fPass<2; fPass++) {
392 Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
393 for (Int_t i=0; i<nentr; i++) {
4c53440c 394// cerr<<fPass<<" "<<i<<'\r';
e43c066c 395 fCurrentEsdTrack = i;
15dd636f 396 AliITStrackMI *t=(AliITStrackMI*)itsTracks.UncheckedAt(i);
e43c066c 397 if (t==0) continue; //this track has been already tracked
b9671574 398 if (t->GetReconstructed()&&(t->GetNUsed()<1.5)) continue; //this track was already "succesfully" reconstructed
791f9a2a 399 //if ( (TMath::Abs(t->GetD(GetX(),GetY())) >3.) && fConstraint[fPass]) continue;
400 //if ( (TMath::Abs(t->GetZat(GetX())-GetZ())>3.) && fConstraint[fPass]) continue;
401 Float_t dz[2]; t->GetDZ(GetX(),GetY(),GetZ(),dz); //I.B.
402 if ( (TMath::Abs(dz[0])>3.) && fConstraint[fPass]) continue;
403 if ( (TMath::Abs(dz[1])>3.) && fConstraint[fPass]) continue;
e43c066c 404
405 Int_t tpcLabel=t->GetLabel(); //save the TPC track label
406 fI = 6;
407 ResetTrackToFollow(*t);
408 ResetBestTrack();
81e97e0d 409 FollowProlongationTree(t,i,fConstraint[fPass]);
e43c066c 410
411 SortTrackHypothesys(fCurrentEsdTrack,20,0); //MI change
412 //
15dd636f 413 AliITStrackMI * besttrack = GetBestHypothesys(fCurrentEsdTrack,t,15);
e43c066c 414 if (!besttrack) continue;
415 besttrack->SetLabel(tpcLabel);
416 // besttrack->CookdEdx();
417 CookdEdx(besttrack);
b9671574 418 besttrack->SetFakeRatio(1.);
e43c066c 419 CookLabel(besttrack,0.); //For comparison only
e43c066c 420 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
628e7bb0 421
422 /*
423 if ( besttrack->GetNumberOfClusters()<6 && fConstraint[fPass]) {
e43c066c 424 continue;
425 }
426 if (besttrack->fChi2MIP[0]+besttrack->fNUsed>3.5) continue;
427 if ( (TMath::Abs(besttrack->fD[0]*besttrack->fD[0]+besttrack->fD[1]*besttrack->fD[1])>0.1) && fConstraint[fPass]) continue;
428 //delete itsTracks.RemoveAt(i);
628e7bb0 429 */
430 if (fConstraint[fPass]&&(!besttrack->IsGoldPrimary())) continue; //to be tracked also without vertex constrain
431
432
b9671574 433 t->SetReconstructed(kTRUE);
e43c066c 434 ntrk++;
435 }
436 GetBestHypothesysMIP(itsTracks);
437 }
438
439 //GetBestHypothesysMIP(itsTracks);
81e97e0d 440 UpdateTPCV0(event);
441 FindV02(event);
628e7bb0 442 fAfterV0 = kTRUE;
443 //GetBestHypothesysMIP(itsTracks);
444 //
e43c066c 445 itsTracks.Delete();
446 //
447 Int_t entries = fTrackHypothesys.GetEntriesFast();
448 for (Int_t ientry=0;ientry<entries;ientry++){
449 TObjArray * array =(TObjArray*)fTrackHypothesys.UncheckedAt(ientry);
450 if (array) array->Delete();
451 delete fTrackHypothesys.RemoveAt(ientry);
452 }
453
454 fTrackHypothesys.Delete();
81e97e0d 455 fBestHypothesys.Delete();
628e7bb0 456 fOriginal.Clear();
457 delete []fCoeficients;
458 fCoeficients=0;
e43c066c 459 Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk);
628e7bb0 460
e43c066c 461 return 0;
462}
463
464
e43c066c 465Int_t AliITStrackerMI::PropagateBack(AliESD *event) {
466 //--------------------------------------------------------------------
467 // This functions propagates reconstructed ITS tracks back
468 // The clusters must be loaded !
469 //--------------------------------------------------------------------
470 Int_t nentr=event->GetNumberOfTracks();
471 Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
472
473 Int_t ntrk=0;
474 for (Int_t i=0; i<nentr; i++) {
475 AliESDtrack *esd=event->GetTrack(i);
476
477 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
478 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
479
15dd636f 480 AliITStrackMI *t=0;
e43c066c 481 try {
15dd636f 482 t=new AliITStrackMI(*esd);
e43c066c 483 } catch (const Char_t *msg) {
628e7bb0 484 //Warning("PropagateBack",msg);
e43c066c 485 delete t;
486 continue;
487 }
b9671574 488 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
e43c066c 489
490 ResetTrackToFollow(*t);
491
492 // propagete to vertex [SR, GSI 17.02.2003]
493 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
494 if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {
6c94f330 495 if (fTrackToFollow.PropagateToVertex(event->GetVertex())) {
e43c066c 496 fTrackToFollow.StartTimeIntegral();
497 }
498 fTrackToFollow.PropagateTo(3.,-0.0028,65.19);
499 }
500
6c94f330 501 fTrackToFollow.ResetCovariance(10.); fTrackToFollow.ResetClusters();
e43c066c 502 if (RefitAt(49.,&fTrackToFollow,t)) {
503 if (CorrectForDeadZoneMaterial(&fTrackToFollow)!=0) {
628e7bb0 504 //Warning("PropagateBack",
505 // "failed to correct for the material in the dead zone !\n");
e43c066c 506 delete t;
507 continue;
508 }
509 fTrackToFollow.SetLabel(t->GetLabel());
510 //fTrackToFollow.CookdEdx();
511 CookLabel(&fTrackToFollow,0.); //For comparison only
512 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
513 //UseClusters(&fTrackToFollow);
514 ntrk++;
515 }
516 delete t;
517 }
518
519 Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk);
520
521 return 0;
522}
523
524Int_t AliITStrackerMI::RefitInward(AliESD *event) {
525 //--------------------------------------------------------------------
526 // This functions refits ITS tracks using the
527 // "inward propagated" TPC tracks
528 // The clusters must be loaded !
529 //--------------------------------------------------------------------
67c1e979 530 RefitV02(event);
e43c066c 531 Int_t nentr=event->GetNumberOfTracks();
532 Info("RefitInward", "Number of ESD tracks: %d\n", nentr);
533
534 Int_t ntrk=0;
535 for (Int_t i=0; i<nentr; i++) {
536 AliESDtrack *esd=event->GetTrack(i);
537
538 if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
539 if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
540 if (esd->GetStatus()&AliESDtrack::kTPCout)
541 if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
542
15dd636f 543 AliITStrackMI *t=0;
e43c066c 544 try {
15dd636f 545 t=new AliITStrackMI(*esd);
e43c066c 546 } catch (const Char_t *msg) {
628e7bb0 547 //Warning("RefitInward",msg);
e43c066c 548 delete t;
549 continue;
550 }
b9671574 551 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
e43c066c 552 if (CorrectForDeadZoneMaterial(t)!=0) {
628e7bb0 553 //Warning("RefitInward",
554 // "failed to correct for the material in the dead zone !\n");
e43c066c 555 delete t;
556 continue;
557 }
558
559 ResetTrackToFollow(*t);
560 fTrackToFollow.ResetClusters();
561
562 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
6c94f330 563 fTrackToFollow.ResetCovariance(10.);
e43c066c 564
565 //Refitting...
ef7253ac 566 if (RefitAt(3.7, &fTrackToFollow, t,kTRUE)) {
e43c066c 567 fTrackToFollow.SetLabel(t->GetLabel());
568 // fTrackToFollow.CookdEdx();
569 CookdEdx(&fTrackToFollow);
570
571 CookLabel(&fTrackToFollow,0.0); //For comparison only
572
573 if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {//The beam pipe
49d13e89 574 AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack();
575 esdTrack->UpdateTrackParams(&fTrackToFollow,AliESDtrack::kITSrefit);
576 Float_t r[3]={0.,0.,0.};
577 Double_t maxD=3.;
578 esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD);
579 ntrk++;
e43c066c 580 }
581 }
582 delete t;
583 }
584
585 Info("RefitInward","Number of refitted tracks: %d\n",ntrk);
586
587 return 0;
588}
589
590AliCluster *AliITStrackerMI::GetCluster(Int_t index) const {
591 //--------------------------------------------------------------------
592 // Return pointer to a given cluster
593 //--------------------------------------------------------------------
594 Int_t l=(index & 0xf0000000) >> 28;
595 Int_t c=(index & 0x0fffffff) >> 00;
596 return fgLayers[l].GetCluster(c);
597}
598
4e65ff9e 599#include "TGeoManager.h"
600#include "TGeoMatrix.h"
601#include "TGeoPhysicalNode.h"
602
df29e9a4 603Bool_t AliITStrackerMI::GetTrackPoint(Int_t index, AliTrackPoint& p) const {
604 //
605 // Get track space point with index i
606 //
78b03929 607 Int_t l=(index & 0xf0000000) >> 28;
608 Int_t c=(index & 0x0fffffff) >> 00;
00a7cc50 609 AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
df29e9a4 610 Int_t idet = cl->GetDetectorIndex();
4e65ff9e 611
612 const char* name = AliAlignObj::SymName((AliAlignObj::ELayerID)
613 (l+AliAlignObj::kFirstLayer), idet);
614 TGeoPNEntry *mapPN = gGeoManager->GetAlignableEntry(name);
615
616 if (!mapPN) return kFALSE;
617 TGeoPhysicalNode *node = mapPN->GetPhysicalNode();
618 if (!node) {
619 gGeoManager->MakeAlignablePN(name);
620 node = mapPN->GetPhysicalNode();
621 }
622 if (!node) return kFALSE;
623 TGeoHMatrix* matrix = node->GetMatrix();
624 if (!matrix) return kFALSE;
625
626 //
627 // Calculate the global coordinates
628 //
629 Double_t localCoord[] = {cl->GetDetLocalX(), 0, cl->GetDetLocalZ()};
630 // LG AliAlignObj makes life simple but keep in mind that alignable
631 // LG volume doesn't mean sensitive volume. There might be a shift
632 // LG between the 2, has it is here for the SPD :
633 if (l<2) localCoord[1] = 0.01;
634 // LG !!! Check for this when the new geometry comes !!!
635 Double_t globalCoord[3] = {0};
636 matrix->LocalToMaster(localCoord, globalCoord);
637 Float_t xyz[3]= {globalCoord[0], globalCoord[1], globalCoord[2]};
638
639 //
640 // Calculate the cov matrix
641 //
642 TGeoRotation rotMatrix(*matrix);
643 TGeoRotation rotMatrixTr(rotMatrix.Inverse());
644 Double_t sigmaArray[] = {cl->GetSigmaY2(),0,0, 0,0,0, 0,0,cl->GetSigmaZ2()};
645 TGeoRotation sigmMatrix;
646 sigmMatrix.SetMatrix( sigmaArray );
647 sigmMatrix.MultiplyBy(&rotMatrixTr, kFALSE);
648 sigmMatrix.MultiplyBy(&rotMatrix, kTRUE);
649 const Double_t *globalSigma = sigmMatrix.GetRotationMatrix();
650 Float_t cov[6]= { globalSigma[0], globalSigma[1], globalSigma[2],
651 globalSigma[4], globalSigma[5],
652 globalSigma[8] };
653
28469fac 654 p.SetXYZ(xyz[0],xyz[1],xyz[2],cov);
df29e9a4 655 AliAlignObj::ELayerID iLayer = AliAlignObj::kInvalidLayer;
656 switch (l) {
657 case 0:
658 iLayer = AliAlignObj::kSPD1;
659 break;
660 case 1:
661 iLayer = AliAlignObj::kSPD2;
662 break;
663 case 2:
664 iLayer = AliAlignObj::kSDD1;
665 break;
666 case 3:
667 iLayer = AliAlignObj::kSDD2;
668 break;
669 case 4:
670 iLayer = AliAlignObj::kSSD1;
671 break;
672 case 5:
673 iLayer = AliAlignObj::kSSD2;
674 break;
675 default:
676 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
677 break;
678 };
679 UShort_t volid = AliAlignObj::LayerToVolUID(iLayer,idet);
680 p.SetVolumeID((UShort_t)volid);
681 return kTRUE;
682}
e43c066c 683
81e97e0d 684void AliITStrackerMI::FollowProlongationTree(AliITStrackMI * otrack, Int_t esdindex, Bool_t constrain)
e43c066c 685{
686 //--------------------------------------------------------------------
687 // Follow prolongation tree
688 //--------------------------------------------------------------------
81e97e0d 689 //
b9671574 690 AliESDtrack * esd = otrack->GetESDtrack();
81e97e0d 691 if (esd->GetV0Index(0)>0){
692 //
693 // TEMPORARY SOLLUTION: map V0 indexes to point to proper track
694 // mapping of esd track is different as its track in Containers
695 // Need something more stable
696 // Indexes are set back againg to the ESD track indexes in UpdateTPCV0
697 for (Int_t i=0;i<3;i++){
698 Int_t index = esd->GetV0Index(i);
699 if (index==0) break;
d6a49f20 700 AliESDv0 * vertex = fEsd->GetV0(index);
81e97e0d 701 if (vertex->GetStatus()<0) continue; // rejected V0
702 //
b75d63a7 703 if (esd->GetSign()>0) {
704 vertex->SetIndex(0,esdindex);
705 }
706 else{
707 vertex->SetIndex(1,esdindex);
708 }
81e97e0d 709 }
710 }
711 TObjArray *bestarray = (TObjArray*)fBestHypothesys.At(esdindex);
712 if (!bestarray){
713 bestarray = new TObjArray(5);
714 fBestHypothesys.AddAt(bestarray,esdindex);
715 }
e43c066c 716
81e97e0d 717 //
e43c066c 718 //setup tree of the prolongations
719 //
15dd636f 720 static AliITStrackMI tracks[7][100];
721 AliITStrackMI *currenttrack;
722 static AliITStrackMI currenttrack1;
723 static AliITStrackMI currenttrack2;
724 static AliITStrackMI backuptrack;
e43c066c 725 Int_t ntracks[7];
726 Int_t nindexes[7][100];
727 Float_t normalizedchi2[100];
728 for (Int_t ilayer=0;ilayer<6;ilayer++) ntracks[ilayer]=0;
b9671574 729 otrack->SetNSkipped(0);
15dd636f 730 new (&(tracks[6][0])) AliITStrackMI(*otrack);
e43c066c 731 ntracks[6]=1;
81e97e0d 732 for (Int_t i=0;i<7;i++) nindexes[i][0]=0;
e43c066c 733 //
734 //
735 // follow prolongations
736 for (Int_t ilayer=5;ilayer>=0;ilayer--){
737 //
738 AliITSlayer &layer=fgLayers[ilayer];
739 Double_t r=layer.GetR();
740 ntracks[ilayer]=0;
741 //
742 //
743 Int_t nskipped=0;
744 Float_t nused =0;
745 for (Int_t itrack =0;itrack<ntracks[ilayer+1];itrack++){
746 //set current track
747 if (ntracks[ilayer]>=100) break;
b9671574 748 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0) nskipped++;
749 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2.) nused++;
e43c066c 750 if (ntracks[ilayer]>15+ilayer){
b9671574 751 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0 && nskipped>4+ilayer) continue;
752 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2. && nused>3) continue;
e43c066c 753 }
754
15dd636f 755 new(&currenttrack1) AliITStrackMI(tracks[ilayer+1][nindexes[ilayer+1][itrack]]);
e43c066c 756 if (ilayer==3 || ilayer==1) {
757 Double_t rs=0.5*(fgLayers[ilayer+1].GetR() + r);
758 Double_t d=0.0034, x0=38.6;
759 if (ilayer==1) {rs=9.; d=0.0097; x0=42;}
760 if (!currenttrack1.PropagateTo(rs,d,x0)) {
761 continue;
762 }
763 }
764 //
765 //find intersection with layer
766 Double_t x,y,z;
767 if (!currenttrack1.GetGlobalXYZat(r,x,y,z)) {
768 continue;
769 }
770 Double_t phi=TMath::ATan2(y,x);
771 Int_t idet=layer.FindDetectorIndex(phi,z);
772 if (idet<0) {
773 continue;
774 }
775 //propagate to the intersection
776 const AliITSdetector &det=layer.GetDetector(idet);
777 phi=det.GetPhi();
15dd636f 778 new(&currenttrack2) AliITStrackMI(currenttrack1);
e43c066c 779 if (!currenttrack1.Propagate(phi,det.GetR())) {
780 continue;
781 }
782 currenttrack2.Propagate(phi,det.GetR()); //
783 currenttrack1.SetDetectorIndex(idet);
784 currenttrack2.SetDetectorIndex(idet);
785
786 //
787 //
788 Double_t dz=7.5*TMath::Sqrt(currenttrack1.GetSigmaZ2() + 16.*kSigmaZ2[ilayer]);
789 Double_t dy=7.5*TMath::Sqrt(currenttrack1.GetSigmaY2() + 16.*kSigmaY2[ilayer]);
790 //
791 Bool_t isBoundary=kFALSE;
792 if (currenttrack1.GetY()-dy< det.GetYmin()+0.2) isBoundary = kTRUE;
793 if (currenttrack1.GetY()+dy> det.GetYmax()-0.2) isBoundary = kTRUE;
794 if (currenttrack1.GetZ()-dz< det.GetZmin()+0.2) isBoundary = kTRUE;
795 if (currenttrack1.GetZ()+dz> det.GetZmax()-0.2) isBoundary = kTRUE;
796
797 if (isBoundary){ // track at boundary between detectors
798 Float_t maxtgl = TMath::Abs(currenttrack1.GetTgl());
799 if (maxtgl>1) maxtgl=1;
800 dz = TMath::Sqrt(dz*dz+0.25*maxtgl*maxtgl);
801 //
802 Float_t maxsnp = TMath::Abs(currenttrack1.GetSnp());
803 if (maxsnp>0.95) continue;
804 //if (maxsnp>0.5) maxsnp=0.5;
805 dy=TMath::Sqrt(dy*dy+0.25*maxsnp*maxsnp);
806 }
807
808 Double_t zmin=currenttrack1.GetZ() - dz;
809 Double_t zmax=currenttrack1.GetZ() + dz;
810 Double_t ymin=currenttrack1.GetY() + r*phi - dy;
811 Double_t ymax=currenttrack1.GetY() + r*phi + dy;
812 layer.SelectClusters(zmin,zmax,ymin,ymax);
813 //
814 // loop over all possible prolongations
815 //
816 Double_t msz=1./((currenttrack1.GetSigmaZ2() + 16.*kSigmaZ2[ilayer]));
817 Double_t msy=1./((currenttrack1.GetSigmaY2() + 16.*kSigmaY2[ilayer]));
81e97e0d 818 if (constrain){
e43c066c 819 msy/=60; msz/=60.;
820 }
821 else{
822 msy/=50; msz/=50.;
823 }
824 //
00a7cc50 825 const AliITSRecPoint *c=0; Int_t ci=-1;
e43c066c 826 Double_t chi2=12345.;
827 Int_t deadzone=0;
828 currenttrack = &currenttrack1;
829 while ((c=layer.GetNextCluster(ci))!=0) {
830 if (ntracks[ilayer]>95) break; //space for skipped clusters
831 Bool_t change =kFALSE;
832 if (c->GetQ()==0 && (deadzone==1)) continue;
833 Int_t idet=c->GetDetectorIndex();
834 if (currenttrack->GetDetectorIndex()!=idet) {
835 const AliITSdetector &det=layer.GetDetector(idet);
836 Double_t y,z;
837 if (!currenttrack2.GetProlongationFast(det.GetPhi(),det.GetR(),y,z)) continue;
838 Float_t pz = (z - c->GetZ()) , py=(y - c->GetY());
839 if (pz*pz*msz+py*py*msy>1.) continue;
840 //
15dd636f 841 new (&backuptrack) AliITStrackMI(currenttrack2);
e43c066c 842 change = kTRUE;
843 currenttrack =&currenttrack2;
844 if (!currenttrack->Propagate(det.GetPhi(),det.GetR())) {
15dd636f 845 new (currenttrack) AliITStrackMI(backuptrack);
e43c066c 846 change = kFALSE;
847 continue;
848 }
849 currenttrack->SetDetectorIndex(idet);
850 }
851 else{
852 Float_t pz = (currenttrack->GetZ() - c->GetZ()) , py=(currenttrack->GetY() - c->GetY());
853 if (pz*pz*msz+py*py*msy>1.) continue;
854 }
855
856 chi2=GetPredictedChi2MI(currenttrack,c,ilayer);
857 if (chi2<kMaxChi2s[ilayer]){
858 if (c->GetQ()==0) deadzone=1; // take dead zone only once
859 if (ntracks[ilayer]>=100) continue;
15dd636f 860 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
b9671574 861 updatetrack->SetClIndex(ilayer,0);
e43c066c 862 if (change){
15dd636f 863 new (&currenttrack2) AliITStrackMI(backuptrack);
e43c066c 864 }
865 if (c->GetQ()!=0){
866 if (!UpdateMI(updatetrack,c,chi2,(ilayer<<28)+ci)) continue;
867 updatetrack->SetSampledEdx(c->GetQ(),updatetrack->GetNumberOfClusters()-1); //b.b.
868 }
869 else {
b9671574 870 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
871 updatetrack->SetDeadZoneProbability(GetDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
e43c066c 872 }
873 if (c->IsUsed()){
b9671574 874 updatetrack->IncrementNUsed();
e43c066c 875 }
876 Double_t x0;
877 Double_t d=layer.GetThickness(updatetrack->GetY(),updatetrack->GetZ(),x0);
878 updatetrack->CorrectForMaterial(d,x0);
81e97e0d 879 if (constrain) {
b9671574 880 updatetrack->SetConstrain(constrain);
e43c066c 881 fI = ilayer;
882 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
883 Double_t xyz[]={GetX(),GetY(),GetZ()};
884 Double_t ptfactor = 1;
885 Double_t ers[]={GetSigmaX()*ptfactor,GetSigmaY()*ptfactor,GetSigmaZ()};
886 Bool_t isPrim = kTRUE;
887 if (ilayer<4){
791f9a2a 888 //updatetrack->fD[0] = updatetrack->GetD(GetX(),GetY());
889 //updatetrack->fD[1] = updatetrack->GetZat(GetX())-GetZ();
b9671574 890 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
891 if ( TMath::Abs(updatetrack->GetD(0)/(1.+ilayer))>0.4 || TMath::Abs(updatetrack->GetD(1)/(1.+ilayer))>0.4) isPrim=kFALSE;
e43c066c 892 }
893 if (isPrim) updatetrack->Improve(d,xyz,ers);
894 } //apply vertex constrain
895 ntracks[ilayer]++;
896 } // create new hypothesy
897 } // loop over possible cluster prolongation
81e97e0d 898 // if (constrain&&itrack<2&&currenttrack1.fNSkipped==0 && deadzone==0){
b9671574 899 if (constrain&&itrack<2&&currenttrack1.GetNSkipped()==0 && deadzone==0&&ntracks[ilayer]<100){
15dd636f 900 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
b9671574 901 vtrack->SetClIndex(ilayer,0);
e43c066c 902 fI = ilayer;
903 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
904 Double_t xyz[]={GetX(),GetY(),GetZ()};
905 Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
906 vtrack->Improve(d,xyz,ers);
b9671574 907 vtrack->IncrementNSkipped();
e43c066c 908 ntracks[ilayer]++;
909 }
628e7bb0 910
6c94f330 911 if (constrain&&itrack<1&&TMath::Abs(currenttrack1.GetTgl())>1.1){ //big theta -- for low mult. runs
628e7bb0 912 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
b9671574 913 vtrack->SetClIndex(ilayer,0);
628e7bb0 914 fI = ilayer;
915 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
916 Double_t xyz[]={GetX(),GetY(),GetZ()};
917 Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
918 vtrack->Improve(d,xyz,ers);
b9671574 919 vtrack->SetNDeadZone(vtrack->GetNDeadZone()+1);
628e7bb0 920 ntracks[ilayer]++;
921 }
922
e43c066c 923
924 } //loop over track candidates
925 //
926 //
927 Int_t accepted=0;
928
929 Int_t golds=0;
930 for (Int_t itrack=0;itrack<ntracks[ilayer];itrack++){
931 normalizedchi2[itrack] = NormalizedChi2(&tracks[ilayer][itrack],ilayer);
932 if ( normalizedchi2[itrack]<3+0.5*ilayer) golds++;
933 if (ilayer>4) accepted++;
934 else{
81e97e0d 935 if ( constrain && normalizedchi2[itrack]<kMaxNormChi2C[ilayer]+1) accepted++;
936 if (!constrain && normalizedchi2[itrack]<kMaxNormChi2NonC[ilayer]+1) accepted++;
e43c066c 937 }
938 }
939 TMath::Sort(ntracks[ilayer],normalizedchi2,nindexes[ilayer],kFALSE);
940 ntracks[ilayer] = TMath::Min(accepted,7+2*ilayer);
941 if (ntracks[ilayer]<golds+2+ilayer) ntracks[ilayer]=TMath::Min(golds+2+ilayer,accepted);
942 if (ntracks[ilayer]>90) ntracks[ilayer]=90;
943 } //loop over layers
944 //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 945 Int_t max = constrain? 20: 5;
e43c066c 946
628e7bb0 947 for (Int_t i=0;i<TMath::Min(max,ntracks[0]);i++) {
15dd636f 948 AliITStrackMI & track= tracks[0][nindexes[0][i]];
628e7bb0 949 if (track.GetNumberOfClusters()<2) continue;
b9671574 950 if (!constrain&&track.GetNormChi2(0)>7.)continue;
15dd636f 951 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
e43c066c 952 }
628e7bb0 953 for (Int_t i=0;i<TMath::Min(2,ntracks[1]);i++) {
15dd636f 954 AliITStrackMI & track= tracks[1][nindexes[1][i]];
e43c066c 955 if (track.GetNumberOfClusters()<4) continue;
b9671574 956 if (!constrain&&track.GetNormChi2(1)>7.)continue;
957 if (constrain) track.IncrementNSkipped();
81e97e0d 958 if (!constrain) {
b9671574 959 track.SetD(0,track.GetD(GetX(),GetY()));
960 track.SetNSkipped(track.GetNSkipped()+4./(4.+8.*TMath::Abs(track.GetD(0))));
961 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
962 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
e43c066c 963 }
964 }
15dd636f 965 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
e43c066c 966 }
967 //}
968
81e97e0d 969 if (!constrain){
628e7bb0 970 for (Int_t i=0;i<TMath::Min(2,ntracks[2]);i++) {
15dd636f 971 AliITStrackMI & track= tracks[2][nindexes[2][i]];
628e7bb0 972 if (track.GetNumberOfClusters()<3) continue;
b9671574 973 if (!constrain&&track.GetNormChi2(2)>7.)continue;
974 if (constrain) track.SetNSkipped(track.GetNSkipped()+2);
81e97e0d 975 if (!constrain){
b9671574 976 track.SetD(0,track.GetD(GetX(),GetY()));
977 track.SetNSkipped(track.GetNSkipped()+7./(7.+8.*TMath::Abs(track.GetD(0))));
978 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
979 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
e43c066c 980 }
981 }
15dd636f 982 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
e43c066c 983 }
984 }
81e97e0d 985
986 if (!constrain){
987 //
988 // register best tracks - important for V0 finder
989 //
990 for (Int_t ilayer=0;ilayer<5;ilayer++){
991 if (ntracks[ilayer]==0) continue;
992 AliITStrackMI & track= tracks[ilayer][nindexes[ilayer][0]];
993 if (track.GetNumberOfClusters()<1) continue;
994 CookLabel(&track,0);
995 bestarray->AddAt(new AliITStrackMI(track),ilayer);
996 }
997 }
998 //
999 // update TPC V0 information
1000 //
b9671574 1001 if (otrack->GetESDtrack()->GetV0Index(0)>0){
81e97e0d 1002 Float_t fprimvertex[3]={GetX(),GetY(),GetZ()};
1003 for (Int_t i=0;i<3;i++){
b9671574 1004 Int_t index = otrack->GetESDtrack()->GetV0Index(i);
81e97e0d 1005 if (index==0) break;
d6a49f20 1006 AliV0 * vertex = (AliV0*)fEsd->GetV0(index);
81e97e0d 1007 if (vertex->GetStatus()<0) continue; // rejected V0
1008 //
6c94f330 1009 if (otrack->GetSign()>0) {
81e97e0d 1010 vertex->SetIndex(0,esdindex);
1011 }
1012 else{
1013 vertex->SetIndex(1,esdindex);
1014 }
1015 //find nearest layer with track info
b75d63a7 1016 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
1017 Int_t nearestold = GetNearestLayer(xrp); //I.B.
81e97e0d 1018 Int_t nearest = nearestold;
1019 for (Int_t ilayer =nearest;ilayer<8;ilayer++){
1020 if (ntracks[nearest]==0){
1021 nearest = ilayer;
1022 }
1023 }
1024 //
1025 AliITStrackMI & track= tracks[nearest][nindexes[nearest][0]];
1026 if (nearestold<5&&nearest<5){
b9671574 1027 Bool_t accept = track.GetNormChi2(nearest)<10;
81e97e0d 1028 if (accept){
6c94f330 1029 if (track.GetSign()>0) {
b75d63a7 1030 vertex->SetParamP(track);
81e97e0d 1031 vertex->Update(fprimvertex);
1032 // vertex->SetIndex(0,track.fESDtrack->GetID());
1033 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1034 }else{
b75d63a7 1035 vertex->SetParamN(track);
81e97e0d 1036 vertex->Update(fprimvertex);
1037 //vertex->SetIndex(1,track.fESDtrack->GetID());
1038 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1039 }
1040 vertex->SetStatus(vertex->GetStatus()+1);
1041 }else{
1042 // vertex->SetStatus(-2); // reject V0 - not enough clusters
1043 }
1044 }
1045 // if (nearestold>3){
1046// Int_t indexlayer = (ntracks[0]>0)? 0:1;
1047// if (ntracks[indexlayer]>0){
1048// AliITStrackMI & track= tracks[indexlayer][nindexes[indexlayer][0]];
1049// if (track.GetNumberOfClusters()>4&&track.fNormChi2[indexlayer]<4){
1050// vertex->SetStatus(-1); // reject V0 - clusters before
1051// }
1052// }
1053// }
1054 }
1055 }
e43c066c 1056}
1057
1058
1059AliITStrackerMI::AliITSlayer & AliITStrackerMI::GetLayer(Int_t layer) const
1060{
1061 //--------------------------------------------------------------------
1062 //
1063 //
1064 return fgLayers[layer];
1065}
8221b41b 1066
1067AliITStrackerMI::AliITSlayer::AliITSlayer():
1068fR(0),
1069fPhiOffset(0),
1070fNladders(0),
1071fZOffset(0),
1072fNdetectors(0),
1073fDetectors(0),
1074fN(0),
1075fDy5(0),
1076fDy10(0),
1077fDy20(0),
1078fClustersCs(0),
1079fClusterIndexCs(0),
1080fYcs(0),
1081fZcs(0),
1082fNcs(0),
1083fCurrentSlice(-1),
1084fZmax(0),
1085fYmin(0),
1086fYmax(0),
1087fI(0),
1088fImax(0),
1089fSkip(0),
1090fAccepted(0),
1091fRoad(0){
e43c066c 1092 //--------------------------------------------------------------------
1093 //default AliITSlayer constructor
1094 //--------------------------------------------------------------------
e43c066c 1095 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
1096 fClusterWeight[i]=0;
1097 fClusterTracks[0][i]=-1;
1098 fClusterTracks[1][i]=-1;
1099 fClusterTracks[2][i]=-1;
1100 fClusterTracks[3][i]=-1;
1101 }
1102}
1103
1104AliITStrackerMI::AliITSlayer::
8221b41b 1105AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd):
1106fR(r),
1107fPhiOffset(p),
1108fNladders(nl),
1109fZOffset(z),
1110fNdetectors(nd),
1111fDetectors(0),
1112fN(0),
1113fDy5(0),
1114fDy10(0),
1115fDy20(0),
1116fClustersCs(0),
1117fClusterIndexCs(0),
1118fYcs(0),
1119fZcs(0),
1120fNcs(0),
1121fCurrentSlice(-1),
1122fZmax(0),
1123fYmin(0),
1124fYmax(0),
1125fI(0),
1126fImax(0),
1127fSkip(0),
1128fAccepted(0),
1129fRoad(0) {
e43c066c 1130 //--------------------------------------------------------------------
1131 //main AliITSlayer constructor
1132 //--------------------------------------------------------------------
e43c066c 1133 fDetectors=new AliITSdetector[fNladders*fNdetectors];
e43c066c 1134 fRoad=2*fR*TMath::Sqrt(3.14/1.);//assuming that there's only one cluster
1135}
1136
8221b41b 1137AliITStrackerMI::AliITSlayer::AliITSlayer(const AliITSlayer& layer):
1138fR(layer.fR),
1139fPhiOffset(layer.fPhiOffset),
1140fNladders(layer.fNladders),
1141fZOffset(layer.fZOffset),
1142fNdetectors(layer.fNdetectors),
1143fDetectors(layer.fDetectors),
1144fN(layer.fN),
1145fDy5(layer.fDy5),
1146fDy10(layer.fDy10),
1147fDy20(layer.fDy20),
1148fClustersCs(layer.fClustersCs),
1149fClusterIndexCs(layer.fClusterIndexCs),
1150fYcs(layer.fYcs),
1151fZcs(layer.fZcs),
1152fNcs(layer.fNcs),
1153fCurrentSlice(layer.fCurrentSlice),
1154fZmax(layer.fZmax),
1155fYmin(layer.fYmin),
1156fYmax(layer.fYmax),
1157fI(layer.fI),
1158fImax(layer.fImax),
1159fSkip(layer.fSkip),
1160fAccepted(layer.fAccepted),
1161fRoad(layer.fRoad){
1162 //Copy constructor
1163}
1164
1165
e43c066c 1166AliITStrackerMI::AliITSlayer::~AliITSlayer() {
1167 //--------------------------------------------------------------------
1168 // AliITSlayer destructor
1169 //--------------------------------------------------------------------
1170 delete[] fDetectors;
1171 for (Int_t i=0; i<fN; i++) delete fClusters[i];
1172 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
1173 fClusterWeight[i]=0;
1174 fClusterTracks[0][i]=-1;
1175 fClusterTracks[1][i]=-1;
1176 fClusterTracks[2][i]=-1;
1177 fClusterTracks[3][i]=-1;
1178 }
1179}
1180
1181void AliITStrackerMI::AliITSlayer::ResetClusters() {
1182 //--------------------------------------------------------------------
1183 // This function removes loaded clusters
1184 //--------------------------------------------------------------------
1185 for (Int_t i=0; i<fN; i++) delete fClusters[i];
1186 for (Int_t i=0; i<kMaxClusterPerLayer;i++){
1187 fClusterWeight[i]=0;
1188 fClusterTracks[0][i]=-1;
1189 fClusterTracks[1][i]=-1;
1190 fClusterTracks[2][i]=-1;
1191 fClusterTracks[3][i]=-1;
1192 }
1193
1194 fN=0;
1195 fI=0;
1196}
1197
1198void AliITStrackerMI::AliITSlayer::ResetWeights() {
1199 //--------------------------------------------------------------------
1200 // This function reset weights of the clusters
1201 //--------------------------------------------------------------------
1202 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
1203 fClusterWeight[i]=0;
1204 fClusterTracks[0][i]=-1;
1205 fClusterTracks[1][i]=-1;
1206 fClusterTracks[2][i]=-1;
1207 fClusterTracks[3][i]=-1;
1208 }
1209 for (Int_t i=0; i<fN;i++) {
00a7cc50 1210 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster(i);
e43c066c 1211 if (cl&&cl->IsUsed()) cl->Use();
1212 }
1213
1214}
1215
1216void AliITStrackerMI::AliITSlayer::ResetRoad() {
1217 //--------------------------------------------------------------------
1218 // This function calculates the road defined by the cluster density
1219 //--------------------------------------------------------------------
1220 Int_t n=0;
1221 for (Int_t i=0; i<fN; i++) {
1222 if (TMath::Abs(fClusters[i]->GetZ())<fR) n++;
1223 }
1224 //if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n);
1225 if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n);
1226}
1227
628e7bb0 1228
00a7cc50 1229Int_t AliITStrackerMI::AliITSlayer::InsertCluster(AliITSRecPoint *c) {
e43c066c 1230 //--------------------------------------------------------------------
1231 //This function adds a cluster to this layer
1232 //--------------------------------------------------------------------
1233 if (fN==kMaxClusterPerLayer) {
1234 ::Error("InsertCluster","Too many clusters !\n");
1235 return 1;
1236 }
1237 fCurrentSlice=-1;
1d4090b7 1238 fClusters[fN]=c;
1239 fN++;
e43c066c 1240 AliITSdetector &det=GetDetector(c->GetDetectorIndex());
e43c066c 1241 if (c->GetY()<det.GetYmin()) det.SetYmin(c->GetY());
1242 if (c->GetY()>det.GetYmax()) det.SetYmax(c->GetY());
1243 if (c->GetZ()<det.GetZmin()) det.SetZmin(c->GetZ());
1244 if (c->GetZ()>det.GetZmax()) det.SetZmax(c->GetZ());
1245
1246 return 0;
1247}
1248
1249void AliITStrackerMI::AliITSlayer::SortClusters()
1250{
1251 //
1252 //sort clusters
1253 //
00a7cc50 1254 AliITSRecPoint **clusters = new AliITSRecPoint*[fN];
1d4090b7 1255 Float_t *z = new Float_t[fN];
1256 Int_t * index = new Int_t[fN];
1257 //
1258 for (Int_t i=0;i<fN;i++){
1259 z[i] = fClusters[i]->GetZ();
1260 }
1261 TMath::Sort(fN,z,index,kFALSE);
1262 for (Int_t i=0;i<fN;i++){
1263 clusters[i] = fClusters[index[i]];
1264 }
1265 //
1266 for (Int_t i=0;i<fN;i++){
1267 fClusters[i] = clusters[i];
1268 fZ[i] = fClusters[i]->GetZ();
1269 AliITSdetector &det=GetDetector(fClusters[i]->GetDetectorIndex());
1270 Double_t y=fR*det.GetPhi() + fClusters[i]->GetY();
1271 if (y>2.*fR*TMath::Pi()) y -= 2.*fR*TMath::Pi();
1272 fY[i] = y;
1273 }
1274 delete[] index;
1275 delete[] z;
1276 delete[] clusters;
1277 //
1278
e43c066c 1279 fYB[0]=10000000;
1280 fYB[1]=-10000000;
1281 for (Int_t i=0;i<fN;i++){
1282 if (fY[i]<fYB[0]) fYB[0]=fY[i];
1283 if (fY[i]>fYB[1]) fYB[1]=fY[i];
1284 fClusterIndex[i] = i;
1285 }
1286 //
1287 // fill slices
1288 fDy5 = (fYB[1]-fYB[0])/5.;
1289 fDy10 = (fYB[1]-fYB[0])/10.;
1290 fDy20 = (fYB[1]-fYB[0])/20.;
1291 for (Int_t i=0;i<6;i++) fN5[i] =0;
1292 for (Int_t i=0;i<11;i++) fN10[i]=0;
1293 for (Int_t i=0;i<21;i++) fN20[i]=0;
1294 //
1295 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;}
1296 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;}
1297 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;}
1298 //
1299 //
1d4090b7 1300 for (Int_t i=0;i<fN;i++)
1301 for (Int_t irot=-1;irot<=1;irot++){
1302 Float_t curY = fY[i]+irot*TMath::TwoPi()*fR;
1303 // slice 5
1304 for (Int_t slice=0; slice<6;slice++){
1305 if (fBy5[slice][0]<curY && curY<fBy5[slice][1]&&fN5[slice]<kMaxClusterPerLayer5){
1306 fClusters5[slice][fN5[slice]] = fClusters[i];
1307 fY5[slice][fN5[slice]] = curY;
1308 fZ5[slice][fN5[slice]] = fZ[i];
1309 fClusterIndex5[slice][fN5[slice]]=i;
1310 fN5[slice]++;
1311 }
e43c066c 1312 }
1d4090b7 1313 // slice 10
1314 for (Int_t slice=0; slice<11;slice++){
1315 if (fBy10[slice][0]<curY && curY<fBy10[slice][1]&&fN10[slice]<kMaxClusterPerLayer10){
1316 fClusters10[slice][fN10[slice]] = fClusters[i];
1317 fY10[slice][fN10[slice]] = curY;
1318 fZ10[slice][fN10[slice]] = fZ[i];
1319 fClusterIndex10[slice][fN10[slice]]=i;
1320 fN10[slice]++;
1321 }
e43c066c 1322 }
1d4090b7 1323 // slice 20
1324 for (Int_t slice=0; slice<21;slice++){
1325 if (fBy20[slice][0]<curY && curY<fBy20[slice][1]&&fN20[slice]<kMaxClusterPerLayer20){
1326 fClusters20[slice][fN20[slice]] = fClusters[i];
1327 fY20[slice][fN20[slice]] = curY;
1328 fZ20[slice][fN20[slice]] = fZ[i];
1329 fClusterIndex20[slice][fN20[slice]]=i;
1330 fN20[slice]++;
1331 }
1332 }
e43c066c 1333 }
1d4090b7 1334
1335 //
1336 // consistency check
1337 //
1338 for (Int_t i=0;i<fN-1;i++){
1339 if (fZ[i]>fZ[i+1]){
1340 printf("Bugg\n");
e43c066c 1341 }
1342 }
1d4090b7 1343 //
1344 for (Int_t slice=0;slice<21;slice++)
1345 for (Int_t i=0;i<fN20[slice]-1;i++){
1346 if (fZ20[slice][i]>fZ20[slice][i+1]){
1347 printf("Bugg\n");
1348 }
1349 }
1350
1351
e43c066c 1352}
1353
1354
e43c066c 1355Int_t AliITStrackerMI::AliITSlayer::FindClusterIndex(Float_t z) const {
1356 //--------------------------------------------------------------------
1357 // This function returns the index of the nearest cluster
1358 //--------------------------------------------------------------------
1359 Int_t ncl=0;
1360 const Float_t *zcl;
1361 if (fCurrentSlice<0) {
1362 ncl = fN;
1363 zcl = fZ;
1364 }
1365 else{
1366 ncl = fNcs;
1367 zcl = fZcs;;
1368 }
1369
1370 if (ncl==0) return 0;
1371 Int_t b=0, e=ncl-1, m=(b+e)/2;
1372 for (; b<e; m=(b+e)/2) {
1373 // if (z > fClusters[m]->GetZ()) b=m+1;
1374 if (z > zcl[m]) b=m+1;
1375 else e=m;
1376 }
1377 return m;
1378}
e43c066c 1379
1380
1381void AliITStrackerMI::AliITSlayer::
1382SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1383 //--------------------------------------------------------------------
1384 // This function sets the "window"
1385 //--------------------------------------------------------------------
1386
628e7bb0 1387 Double_t circle=2*TMath::Pi()*fR;
e43c066c 1388 fYmin = ymin; fYmax =ymax;
1389 Float_t ymiddle = (fYmin+fYmax)*0.5;
1390 if (ymiddle<fYB[0]) {fYmin+=circle; fYmax+=circle;ymiddle+=circle;}
1391 else{
1392 if (ymiddle>fYB[1]) {fYmin-=circle; fYmax-=circle;ymiddle-=circle;}
1393 }
1394 //
1395 fCurrentSlice =-1;
1396 // defualt take all
1397 fClustersCs = fClusters;
1398 fClusterIndexCs = fClusterIndex;
1399 fYcs = fY;
1400 fZcs = fZ;
1401 fNcs = fN;
628e7bb0 1402 //
e43c066c 1403 //is in 20 slice?
1404 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy20){
1405 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy20);
1406 if (slice<0) slice=0;
1407 if (slice>20) slice=20;
1408 Bool_t isOK = (fYmin>fBy20[slice][0]&&fYmax<fBy20[slice][1]);
1409 if (isOK) {
1410 fCurrentSlice=slice;
1411 fClustersCs = fClusters20[fCurrentSlice];
1412 fClusterIndexCs = fClusterIndex20[fCurrentSlice];
1413 fYcs = fY20[fCurrentSlice];
1414 fZcs = fZ20[fCurrentSlice];
1415 fNcs = fN20[fCurrentSlice];
1416 }
1417 }
1418 //
1419 //is in 10 slice?
1420 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy10){
1421 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy10);
1422 if (slice<0) slice=0;
1423 if (slice>10) slice=10;
1424 Bool_t isOK = (fYmin>fBy10[slice][0]&&fYmax<fBy10[slice][1]);
1425 if (isOK) {
1426 fCurrentSlice=slice;
1427 fClustersCs = fClusters10[fCurrentSlice];
1428 fClusterIndexCs = fClusterIndex10[fCurrentSlice];
1429 fYcs = fY10[fCurrentSlice];
1430 fZcs = fZ10[fCurrentSlice];
1431 fNcs = fN10[fCurrentSlice];
1432 }
1433 }
1434 //
1435 //is in 5 slice?
1436 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy5){
1437 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy5);
1438 if (slice<0) slice=0;
1439 if (slice>5) slice=5;
1440 Bool_t isOK = (fYmin>fBy5[slice][0]&&fYmax<fBy5[slice][1]);
1441 if ( isOK){
1442 fCurrentSlice=slice;
1443 fClustersCs = fClusters5[fCurrentSlice];
1444 fClusterIndexCs = fClusterIndex5[fCurrentSlice];
1445 fYcs = fY5[fCurrentSlice];
1446 fZcs = fZ5[fCurrentSlice];
1447 fNcs = fN5[fCurrentSlice];
1448 }
1449 }
628e7bb0 1450 //
e43c066c 1451 fI=FindClusterIndex(zmin); fZmax=zmax;
1452 fImax = TMath::Min(FindClusterIndex(zmax)+1,fNcs);
1453 fSkip = 0;
1454 fAccepted =0;
1455}
1456
e43c066c 1457
628e7bb0 1458
1459
1460Int_t AliITStrackerMI::AliITSlayer::
1461FindDetectorIndex(Double_t phi, Double_t z) const {
1462 //--------------------------------------------------------------------
1463 //This function finds the detector crossed by the track
1464 //--------------------------------------------------------------------
1465 Double_t dphi=-(phi-fPhiOffset);
1466 if (dphi < 0) dphi += 2*TMath::Pi();
1467 else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi();
1468 Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5);
1469 if (np>=fNladders) np-=fNladders;
1470 if (np<0) np+=fNladders;
1471
1472 Double_t dz=fZOffset-z;
1473 Int_t nz=Int_t(dz*(fNdetectors-1)*0.5/fZOffset+0.5);
1474 if (nz>=fNdetectors) return -1;
1475 if (nz<0) return -1;
1476
1477 return np*fNdetectors + nz;
1478}
1479
1480
00a7cc50 1481const AliITSRecPoint *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci){
e43c066c 1482 //--------------------------------------------------------------------
1483 // This function returns clusters within the "window"
1484 //--------------------------------------------------------------------
1485
1486 if (fCurrentSlice<0){
1487 Double_t rpi2 = 2.*fR*TMath::Pi();
1488 for (Int_t i=fI; i<fImax; i++) {
1489 Double_t y = fY[i];
1490 if (fYmax<y) y -= rpi2;
1d4090b7 1491 if (fYmin>y) y += rpi2;
e43c066c 1492 if (y<fYmin) continue;
1493 if (y>fYmax) continue;
1494 if (fClusters[i]->GetQ()==0&&fSkip==2) continue;
1495 ci=i;
1496 fI=i+1;
1497 return fClusters[i];
1498 }
1499 }
1500 else{
1501 for (Int_t i=fI; i<fImax; i++) {
1502 if (fYcs[i]<fYmin) continue;
1503 if (fYcs[i]>fYmax) continue;
1504 if (fClustersCs[i]->GetQ()==0&&fSkip==2) continue;
1505 ci=fClusterIndexCs[i];
1506 fI=i+1;
1507 return fClustersCs[i];
1508 }
1509 }
1510 return 0;
1511}
1512
1513
1514
e43c066c 1515Double_t AliITStrackerMI::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0)
1516const {
1517 //--------------------------------------------------------------------
1518 //This function returns the layer thickness at this point (units X0)
1519 //--------------------------------------------------------------------
1520 Double_t d=0.0085;
1521 x0=21.82;
1522 if (43<fR&&fR<45) { //SSD2
1523 Double_t dd=0.0034;
1524 d=dd;
1525 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1526 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1527 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1528 for (Int_t i=0; i<12; i++) {
1529 if (TMath::Abs(z-3.9*(i+0.5))<0.15) {
1530 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1531 d+=0.0034;
1532 break;
1533 }
1534 if (TMath::Abs(z+3.9*(i+0.5))<0.15) {
1535 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1536 d+=0.0034;
1537 break;
1538 }
1539 if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1540 if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1541 }
1542 } else
1543 if (37<fR&&fR<41) { //SSD1
1544 Double_t dd=0.0034;
1545 d=dd;
1546 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1547 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1548 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1549 for (Int_t i=0; i<11; i++) {
1550 if (TMath::Abs(z-3.9*i)<0.15) {
1551 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1552 d+=dd;
1553 break;
1554 }
1555 if (TMath::Abs(z+3.9*i)<0.15) {
1556 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1557 d+=dd;
1558 break;
1559 }
1560 if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1561 if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1562 }
1563 } else
1564 if (13<fR&&fR<26) { //SDD
1565 Double_t dd=0.0033;
1566 d=dd;
1567 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1568
1569 if (TMath::Abs(y-1.80)<0.55) {
1570 d+=0.016;
1571 for (Int_t j=0; j<20; j++) {
1572 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1573 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1574 }
1575 }
1576 if (TMath::Abs(y+1.80)<0.55) {
1577 d+=0.016;
1578 for (Int_t j=0; j<20; j++) {
1579 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1580 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1581 }
1582 }
1583
1584 for (Int_t i=0; i<4; i++) {
1585 if (TMath::Abs(z-7.3*i)<0.60) {
1586 d+=dd;
1587 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1588 break;
1589 }
1590 if (TMath::Abs(z+7.3*i)<0.60) {
1591 d+=dd;
1592 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1593 break;
1594 }
1595 }
1596 } else
1597 if (6<fR&&fR<8) { //SPD2
1598 Double_t dd=0.0063; x0=21.5;
1599 d=dd;
1600 if (TMath::Abs(y-3.08)>0.5) d+=dd;
1601 //if (TMath::Abs(y-3.08)>0.45) d+=dd;
1602 if (TMath::Abs(y-3.03)<0.10) {d+=0.014;}
1603 } else
1604 if (3<fR&&fR<5) { //SPD1
1605 Double_t dd=0.0063; x0=21.5;
1606 d=dd;
1607 if (TMath::Abs(y+0.21)>0.6) d+=dd;
1608 //if (TMath::Abs(y+0.21)>0.45) d+=dd;
1609 if (TMath::Abs(y+0.10)<0.10) {d+=0.014;}
1610 }
1611
1612 return d;
1613}
1614
1615Double_t AliITStrackerMI::GetEffectiveThickness(Double_t y,Double_t z) const
1616{
1617 //--------------------------------------------------------------------
1618 //Returns the thickness between the current layer and the vertex (units X0)
1619 //--------------------------------------------------------------------
1620 Double_t d=0.0028*3*3; //beam pipe
1621 Double_t x0=0;
1622
1623 Double_t xn=fgLayers[fI].GetR();
1624 for (Int_t i=0; i<fI; i++) {
1625 Double_t xi=fgLayers[i].GetR();
1626 d+=fgLayers[i].GetThickness(y,z,x0)*xi*xi;
1627 }
1628
1629 if (fI>1) {
1630 Double_t xi=9.;
1631 d+=0.0097*xi*xi;
1632 }
1633
1634 if (fI>3) {
1635 Double_t xi=0.5*(fgLayers[3].GetR()+fgLayers[4].GetR());
1636 d+=0.0034*xi*xi;
1637 }
1638
1639 return d/(xn*xn);
1640}
1641
1642Int_t AliITStrackerMI::AliITSlayer::InRoad() const {
1643 //--------------------------------------------------------------------
1644 // This function returns number of clusters within the "window"
1645 //--------------------------------------------------------------------
1646 Int_t ncl=0;
1647 for (Int_t i=fI; i<fN; i++) {
00a7cc50 1648 const AliITSRecPoint *c=fClusters[i];
e43c066c 1649 if (c->GetZ() > fZmax) break;
1650 if (c->IsUsed()) continue;
1651 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
1652 Double_t y=fR*det.GetPhi() + c->GetY();
1653
1654 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
1655 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
1656
1657 if (y<fYmin) continue;
1658 if (y>fYmax) continue;
1659 ncl++;
1660 }
1661 return ncl;
1662}
1663
ef7253ac 1664Bool_t AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *t,
1665 const AliITStrackMI *c, Bool_t extra) {
e43c066c 1666 //--------------------------------------------------------------------
1667 // This function refits the track "t" at the position "x" using
1668 // the clusters from "c"
ef7253ac 1669 // If "extra"==kTRUE,
1670 // the clusters from overlapped modules get attached to "t"
e43c066c 1671 //--------------------------------------------------------------------
1672 Int_t index[kMaxLayer];
1673 Int_t k;
1674 for (k=0; k<kMaxLayer; k++) index[k]=-1;
1675 Int_t nc=c->GetNumberOfClusters();
1676 for (k=0; k<nc; k++) {
1677 Int_t idx=c->GetClusterIndex(k),nl=(idx&0xf0000000)>>28;
1678 index[nl]=idx;
1679 }
1680
1681 Int_t from, to, step;
1682 if (xx > t->GetX()) {
1683 from=0; to=kMaxLayer;
1684 step=+1;
1685 } else {
1686 from=kMaxLayer-1; to=-1;
1687 step=-1;
1688 }
1689
1690 for (Int_t i=from; i != to; i += step) {
1691 AliITSlayer &layer=fgLayers[i];
1692 Double_t r=layer.GetR();
1693
1694 {
1695 Double_t hI=i-0.5*step;
1696 if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) {
1697 Double_t rs=0.5*(fgLayers[i-step].GetR() + r);
1698 Double_t d=0.0034, x0=38.6;
1699 if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;}
1700 if (!t->PropagateTo(rs,-step*d,x0)) {
1701 return kFALSE;
1702 }
1703 }
1704 }
1705
1706 // remember old position [SR, GSI 18.02.2003]
1707 Double_t oldX=0., oldY=0., oldZ=0.;
1708 if (t->IsStartedTimeIntegral() && step==1) {
1709 t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ);
1710 }
1711 //
1712
1713 Double_t x,y,z;
1714 if (!t->GetGlobalXYZat(r,x,y,z)) {
1715 return kFALSE;
1716 }
1717 Double_t phi=TMath::ATan2(y,x);
1718 Int_t idet=layer.FindDetectorIndex(phi,z);
1719 if (idet<0) {
1720 return kFALSE;
1721 }
1722 const AliITSdetector &det=layer.GetDetector(idet);
1723 phi=det.GetPhi();
1724 if (!t->Propagate(phi,det.GetR())) {
1725 return kFALSE;
1726 }
1727 t->SetDetectorIndex(idet);
1728
00a7cc50 1729 const AliITSRecPoint *cl=0;
e43c066c 1730 Double_t maxchi2=1000.*kMaxChi2;
1731
1732 Int_t idx=index[i];
1733 if (idx>0) {
00a7cc50 1734 const AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(idx);
67c1e979 1735 if (c){
1736 if (idet != c->GetDetectorIndex()) {
1737 idet=c->GetDetectorIndex();
1738 const AliITSdetector &det=layer.GetDetector(idet);
1739 if (!t->Propagate(det.GetPhi(),det.GetR())) {
1740 return kFALSE;
1741 }
1742 t->SetDetectorIndex(idet);
1743 }
1744 //Double_t chi2=t->GetPredictedChi2(c);
1745 Int_t layer = (idx & 0xf0000000) >> 28;;
1746 Double_t chi2=GetPredictedChi2MI(t,c,layer);
1747 if (chi2<maxchi2) {
1748 cl=c;
1749 maxchi2=chi2;
1750 } else {
1751 return kFALSE;
1752 }
1753 }
1754 }
67c1e979 1755
67c1e979 1756 if (cl) {
1757 //if (!t->Update(cl,maxchi2,idx)) {
1758 if (!UpdateMI(t,cl,maxchi2,idx)) {
1759 return kFALSE;
1760 }
1761 t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
1762 }
1763
1764 {
1765 Double_t x0;
1766 Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0);
1767 t->CorrectForMaterial(-step*d,x0);
1768 }
1769
ef7253ac 1770 if (extra) { //search for extra clusters
1771 AliITStrackV2 tmp(*t);
1772 Double_t dz=4*TMath::Sqrt(tmp.GetSigmaZ2()+kSigmaZ2[i]);
1773 if (dz < 0.5*TMath::Abs(tmp.GetTgl())) dz=0.5*TMath::Abs(tmp.GetTgl());
1774 Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+kSigmaY2[i]);
1775 if (dy < 0.5*TMath::Abs(tmp.GetSnp())) dy=0.5*TMath::Abs(tmp.GetSnp());
1776 Double_t zmin=t->GetZ() - dz;
1777 Double_t zmax=t->GetZ() + dz;
1778 Double_t ymin=t->GetY() + phi*r - dy;
1779 Double_t ymax=t->GetY() + phi*r + dy;
1780 layer.SelectClusters(zmin,zmax,ymin,ymax);
1781
1782 const AliITSRecPoint *c=0; Int_t ci=-1,cci=-1;
1783 Double_t maxchi2=1000.*kMaxChi2, tolerance=0.1;
1784 while ((c=layer.GetNextCluster(ci))!=0) {
1785 if (idet == c->GetDetectorIndex()) continue;
1786
1787 const AliITSdetector &det=layer.GetDetector(c->GetDetectorIndex());
1788
1789 if (!tmp.Propagate(det.GetPhi(),det.GetR())) continue;
1790
1791 if (TMath::Abs(tmp.GetZ() - c->GetZ()) > tolerance) continue;
1792 if (TMath::Abs(tmp.GetY() - c->GetY()) > tolerance) continue;
1793
1794 Double_t chi2=tmp.GetPredictedChi2(c);
1795 if (chi2<maxchi2) { maxchi2=chi2; cci=ci; }
1796 }
1797 if (cci>=0) t->SetExtraCluster(i,(i<<28)+cci);
1798 }
1799
67c1e979 1800 // track time update [SR, GSI 17.02.2003]
1801 if (t->IsStartedTimeIntegral() && step==1) {
1802 Double_t newX, newY, newZ;
1803 t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
1804 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
1805 (oldZ-newZ)*(oldZ-newZ);
1806 t->AddTimeStep(TMath::Sqrt(dL2));
1807 }
1808 //
1809
1810 }
1811
1812 if (!t->PropagateTo(xx,0.,0.)) return kFALSE;
1813 return kTRUE;
1814}
1815
67c1e979 1816Bool_t
1817AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *t,const Int_t *clindex) {
1818 //--------------------------------------------------------------------
1819 // This function refits the track "t" at the position "x" using
1820 // the clusters from array
1821 //--------------------------------------------------------------------
1822 Int_t index[kMaxLayer];
1823 Int_t k;
1824 for (k=0; k<kMaxLayer; k++) index[k]=-1;
1825 //
1826 for (k=0; k<kMaxLayer; k++) {
1827 index[k]=clindex[k];
1828 }
1829
1830 Int_t from, to, step;
1831 if (xx > t->GetX()) {
1832 from=0; to=kMaxLayer;
1833 step=+1;
1834 } else {
1835 from=kMaxLayer-1; to=-1;
1836 step=-1;
1837 }
1838
1839 for (Int_t i=from; i != to; i += step) {
1840 AliITSlayer &layer=fgLayers[i];
1841 Double_t r=layer.GetR();
1842 if (step<0 && xx>r) break; //
1843 {
1844 Double_t hI=i-0.5*step;
1845 if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) {
1846 Double_t rs=0.5*(fgLayers[i-step].GetR() + r);
1847 Double_t d=0.0034, x0=38.6;
1848 if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;}
1849 if (!t->PropagateTo(rs,-step*d,x0)) {
1850 return kFALSE;
e43c066c 1851 }
67c1e979 1852 }
1853 }
1854
1855 // remember old position [SR, GSI 18.02.2003]
1856 Double_t oldX=0., oldY=0., oldZ=0.;
1857 if (t->IsStartedTimeIntegral() && step==1) {
1858 t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ);
1859 }
1860 //
1861
1862 Double_t x,y,z;
1863 if (!t->GetGlobalXYZat(r,x,y,z)) {
1864 return kFALSE;
1865 }
1866 Double_t phi=TMath::ATan2(y,x);
1867 Int_t idet=layer.FindDetectorIndex(phi,z);
1868 if (idet<0) {
1869 return kFALSE;
1870 }
1871 const AliITSdetector &det=layer.GetDetector(idet);
1872 phi=det.GetPhi();
1873 if (!t->Propagate(phi,det.GetR())) {
1874 return kFALSE;
1875 }
1876 t->SetDetectorIndex(idet);
1877
00a7cc50 1878 const AliITSRecPoint *cl=0;
67c1e979 1879 Double_t maxchi2=1000.*kMaxChi2;
1880
1881 Int_t idx=index[i];
1882 if (idx>0) {
00a7cc50 1883 const AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(idx);
67c1e979 1884 if (c){
1885 if (idet != c->GetDetectorIndex()) {
1886 idet=c->GetDetectorIndex();
1887 const AliITSdetector &det=layer.GetDetector(idet);
1888 if (!t->Propagate(det.GetPhi(),det.GetR())) {
1889 return kFALSE;
1890 }
1891 t->SetDetectorIndex(idet);
1892 }
1893 //Double_t chi2=t->GetPredictedChi2(c);
1894 Int_t layer = (idx & 0xf0000000) >> 28;;
1895 Double_t chi2=GetPredictedChi2MI(t,c,layer);
1896 if (chi2<maxchi2) {
1897 cl=c;
1898 maxchi2=chi2;
1899 } else {
1900 return kFALSE;
1901 }
e43c066c 1902 }
1903 }
1904 /*
1905 if (cl==0)
1906 if (t->GetNumberOfClusters()>2) {
1907 Double_t dz=4*TMath::Sqrt(t->GetSigmaZ2()+kSigmaZ2[i]);
1908 Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+kSigmaY2[i]);
1909 Double_t zmin=t->GetZ() - dz;
1910 Double_t zmax=t->GetZ() + dz;
1911 Double_t ymin=t->GetY() + phi*r - dy;
1912 Double_t ymax=t->GetY() + phi*r + dy;
1913 layer.SelectClusters(zmin,zmax,ymin,ymax);
1914
00a7cc50 1915 const AliITSRecPoint *c=0; Int_t ci=-1;
e43c066c 1916 while ((c=layer.GetNextCluster(ci))!=0) {
1917 if (idet != c->GetDetectorIndex()) continue;
1918 Double_t chi2=t->GetPredictedChi2(c);
1919 if (chi2<maxchi2) { cl=c; maxchi2=chi2; idx=ci; }
1920 }
1921 }
1922 */
1923 if (cl) {
1924 //if (!t->Update(cl,maxchi2,idx)) {
1925 if (!UpdateMI(t,cl,maxchi2,idx)) {
1926 return kFALSE;
1927 }
1928 t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
1929 }
1930
1931 {
1932 Double_t x0;
1933 Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0);
1934 t->CorrectForMaterial(-step*d,x0);
1935 }
1936
1937 // track time update [SR, GSI 17.02.2003]
1938 if (t->IsStartedTimeIntegral() && step==1) {
1939 Double_t newX, newY, newZ;
1940 t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
1941 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
1942 (oldZ-newZ)*(oldZ-newZ);
1943 t->AddTimeStep(TMath::Sqrt(dL2));
1944 }
1945 //
1946
1947 }
1948
1949 if (!t->PropagateTo(xx,0.,0.)) return kFALSE;
1950 return kTRUE;
1951}
1952
15dd636f 1953Double_t AliITStrackerMI::GetNormalizedChi2(AliITStrackMI * track, Int_t mode)
e43c066c 1954{
1955 //
1956 // calculate normalized chi2
1957 // return NormalizedChi2(track,0);
1958 Float_t chi2 = 0;
1959 Float_t sum=0;
1960 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
1961 // track->fdEdxMismatch=0;
1962 Float_t dedxmismatch =0;
1963 Float_t *ny = GetNy(fCurrentEsdTrack), *nz = GetNz(fCurrentEsdTrack);
1964 if (mode<100){
1965 for (Int_t i = 0;i<6;i++){
b9671574 1966 if (track->GetClIndex(i)>0){
e43c066c 1967 Float_t cerry, cerrz;
1968 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1969 else
b9671574 1970 { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
e43c066c 1971 cerry*=cerry;
1972 cerrz*=cerrz;
b9671574 1973 Float_t cchi2 = (track->GetDy(i)*track->GetDy(i)/cerry)+(track->GetDz(i)*track->GetDz(i)/cerrz);
e43c066c 1974 if (i>1){
b9671574 1975 Float_t ratio = track->GetNormQ(i)/track->GetExpQ();
e43c066c 1976 if (ratio<0.5) {
1977 cchi2+=(0.5-ratio)*10.;
1978 //track->fdEdxMismatch+=(0.5-ratio)*10.;
1979 dedxmismatch+=(0.5-ratio)*10.;
1980 }
1981 }
1982 if (i<2 ||i>3){
b9671574 1983 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster( track->GetClIndex(i));
e43c066c 1984 Double_t delta = cl->GetNy()+cl->GetNz()-ny[i]-nz[i];
1985 if (delta>1) chi2 +=0.5*TMath::Min(delta/2,2.);
1986 if (i<2) chi2+=2*cl->GetDeltaProbability();
1987 }
1988 chi2+=cchi2;
1989 sum++;
1990 }
1991 }
b9671574 1992 if (TMath::Abs(track->GetdEdxMismatch()-dedxmismatch)>0.0001){
1993 track->SetdEdxMismatch(dedxmismatch);
e43c066c 1994 }
1995 }
1996 else{
1997 for (Int_t i = 0;i<4;i++){
b9671574 1998 if (track->GetClIndex(i)>0){
e43c066c 1999 Float_t cerry, cerrz;
2000 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
b9671574 2001 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
e43c066c 2002 cerry*=cerry;
2003 cerrz*=cerrz;
b9671574 2004 chi2+= (track->GetDy(i)*track->GetDy(i)/cerry);
2005 chi2+= (track->GetDz(i)*track->GetDz(i)/cerrz);
e43c066c 2006 sum++;
2007 }
2008 }
2009 for (Int_t i = 4;i<6;i++){
b9671574 2010 if (track->GetClIndex(i)>0){
e43c066c 2011 Float_t cerry, cerrz;
2012 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
b9671574 2013 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
e43c066c 2014 cerry*=cerry;
2015 cerrz*=cerrz;
2016 Float_t cerryb, cerrzb;
2017 if (ny[i+6]>0) {cerryb = erry[i+6]; cerrzb=errz[i+6];}
b9671574 2018 else { cerryb= track->GetSigmaY(i+6); cerrzb = track->GetSigmaZ(i+6);}
e43c066c 2019 cerryb*=cerryb;
2020 cerrzb*=cerrzb;
b9671574 2021 chi2+= TMath::Min((track->GetDy(i+6)*track->GetDy(i+6)/cerryb),track->GetDy(i)*track->GetDy(i)/cerry);
2022 chi2+= TMath::Min((track->GetDz(i+6)*track->GetDz(i+6)/cerrzb),track->GetDz(i)*track->GetDz(i)/cerrz);
e43c066c 2023 sum++;
2024 }
2025 }
2026 }
b9671574 2027 if (track->GetESDtrack()->GetTPCsignal()>85){
2028 Float_t ratio = track->GetdEdx()/track->GetESDtrack()->GetTPCsignal();
e43c066c 2029 if (ratio<0.5) {
2030 chi2+=(0.5-ratio)*5.;
2031 }
2032 if (ratio>2){
2033 chi2+=(ratio-2.0)*3;
2034 }
2035 }
2036 //
b9671574 2037 Double_t match = TMath::Sqrt(track->GetChi22());
2038 if (track->GetConstrain()) match/=track->GetNumberOfClusters();
2039 if (!track->GetConstrain()) match/=track->GetNumberOfClusters()-2.;
e43c066c 2040 if (match<0) match=0;
b9671574 2041 Float_t deadzonefactor = (track->GetNDeadZone()>0) ? 3*(1.1-track->GetDeadZoneProbability()):0.;
2042 Double_t normchi2 = 2*track->GetNSkipped()+match+deadzonefactor+(1+(2*track->GetNSkipped()+deadzonefactor)/track->GetNumberOfClusters())*
2043 (chi2)/TMath::Max(double(sum-track->GetNSkipped()),
2044 1./(1.+track->GetNSkipped()));
e43c066c 2045
2046 return normchi2;
2047}
2048
2049
15dd636f 2050Double_t AliITStrackerMI::GetMatchingChi2(AliITStrackMI * track1, AliITStrackMI * track2)
e43c066c 2051{
2052 //
2053 // return matching chi2 between two tracks
15dd636f 2054 AliITStrackMI track3(*track2);
e43c066c 2055 track3.Propagate(track1->GetAlpha(),track1->GetX());
2056 TMatrixD vec(5,1);
6c94f330 2057 vec(0,0)=track1->GetY() - track3.GetY();
2058 vec(1,0)=track1->GetZ() - track3.GetZ();
2059 vec(2,0)=track1->GetSnp() - track3.GetSnp();
2060 vec(3,0)=track1->GetTgl() - track3.GetTgl();
2061 vec(4,0)=track1->Get1Pt() - track3.Get1Pt();
e43c066c 2062 //
2063 TMatrixD cov(5,5);
6c94f330 2064 cov(0,0) = track1->GetSigmaY2()+track3.GetSigmaY2();
2065 cov(1,1) = track1->GetSigmaZ2()+track3.GetSigmaZ2();
2066 cov(2,2) = track1->GetSigmaSnp2()+track3.GetSigmaSnp2();
2067 cov(3,3) = track1->GetSigmaTgl2()+track3.GetSigmaTgl2();
2068 cov(4,4) = track1->GetSigma1Pt2()+track3.GetSigma1Pt2();
e43c066c 2069
6c94f330 2070 cov(0,1)=cov(1,0) = track1->GetSigmaZY()+track3.GetSigmaZY();
2071 cov(0,2)=cov(2,0) = track1->GetSigmaSnpY()+track3.GetSigmaSnpY();
2072 cov(0,3)=cov(3,0) = track1->GetSigmaTglY()+track3.GetSigmaTglY();
2073 cov(0,4)=cov(4,0) = track1->GetSigma1PtY()+track3.GetSigma1PtY();
e43c066c 2074 //
6c94f330 2075 cov(1,2)=cov(2,1) = track1->GetSigmaSnpZ()+track3.GetSigmaSnpZ();
2076 cov(1,3)=cov(3,1) = track1->GetSigmaTglZ()+track3.GetSigmaTglZ();
2077 cov(1,4)=cov(4,1) = track1->GetSigma1PtZ()+track3.GetSigma1PtZ();
e43c066c 2078 //
6c94f330 2079 cov(2,3)=cov(3,2) = track1->GetSigmaTglSnp()+track3.GetSigmaTglSnp();
2080 cov(2,4)=cov(4,2) = track1->GetSigma1PtSnp()+track3.GetSigma1PtSnp();
e43c066c 2081 //
6c94f330 2082 cov(3,4)=cov(4,3) = track1->GetSigma1PtTgl()+track3.GetSigma1PtTgl();
e43c066c 2083
2084 cov.Invert();
2085 TMatrixD vec2(cov,TMatrixD::kMult,vec);
2086 TMatrixD chi2(vec2,TMatrixD::kTransposeMult,vec);
2087 return chi2(0,0);
2088}
2089
2090Double_t AliITStrackerMI::GetDeadZoneProbability(Double_t zpos, Double_t zerr)
2091{
2092 //
2093 // return probability that given point - characterized by z position and error is in dead zone
2094 //
2095 Double_t probability =0;
2096 Double_t absz = TMath::Abs(zpos);
2097 Double_t nearestz = (absz<2)? 0.:7.1;
2098 if (TMath::Abs(absz-nearestz)>0.25+3*zerr) return 0;
2099 Double_t zmin=0, zmax=0;
2100 if (zpos<-6.){
2101 zmin = -7.25; zmax = -6.95;
2102 }
2103 if (zpos>6){
2104 zmin = 7.0; zmax =7.3;
2105 }
2106 if (absz<2){
2107 zmin = -0.75; zmax = 1.5;
2108 }
2109 probability = (TMath::Erf((zpos-zmin)/zerr) - TMath::Erf((zpos-zmax)/zerr))*0.5;
2110 return probability;
2111}
2112
2113
15dd636f 2114Double_t AliITStrackerMI::GetTruncatedChi2(AliITStrackMI * track, Float_t fac)
e43c066c 2115{
2116 //
2117 // calculate normalized chi2
2118 Float_t chi2[6];
2119 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2120 Float_t ncl = 0;
2121 for (Int_t i = 0;i<6;i++){
b9671574 2122 if (TMath::Abs(track->GetDy(i))>0){
2123 chi2[i]= (track->GetDy(i)/erry[i])*(track->GetDy(i)/erry[i]);
2124 chi2[i]+= (track->GetDz(i)/errz[i])*(track->GetDz(i)/errz[i]);
e43c066c 2125 ncl++;
2126 }
2127 else{chi2[i]=10000;}
2128 }
2129 Int_t index[6];
2130 TMath::Sort(6,chi2,index,kFALSE);
2131 Float_t max = float(ncl)*fac-1.;
2132 Float_t sumchi=0, sumweight=0;
2133 for (Int_t i=0;i<max+1;i++){
2134 Float_t weight = (i<max)?1.:(max+1.-i);
2135 sumchi+=weight*chi2[index[i]];
2136 sumweight+=weight;
2137 }
2138 Double_t normchi2 = sumchi/sumweight;
2139 return normchi2;
2140}
2141
2142
15dd636f 2143Double_t AliITStrackerMI::GetInterpolatedChi2(AliITStrackMI * forwardtrack, AliITStrackMI * backtrack)
e43c066c 2144{
2145 //
2146 // calculate normalized chi2
2147 // if (forwardtrack->fNUsed>0.3*float(forwardtrack->GetNumberOfClusters())) return 10000;
2148 Int_t npoints = 0;
2149 Double_t res =0;
2150 for (Int_t i=0;i<6;i++){
b9671574 2151 if ( (backtrack->GetSigmaY(i)<0.000000001) || (forwardtrack->GetSigmaY(i)<0.000000001)) continue;
2152 Double_t sy1 = forwardtrack->GetSigmaY(i);
2153 Double_t sz1 = forwardtrack->GetSigmaZ(i);
2154 Double_t sy2 = backtrack->GetSigmaY(i);
2155 Double_t sz2 = backtrack->GetSigmaZ(i);
e43c066c 2156 if (i<2){ sy2=1000.;sz2=1000;}
2157 //
b9671574 2158 Double_t dy0 = (forwardtrack->GetDy(i)/(sy1*sy1) +backtrack->GetDy(i)/(sy2*sy2))/(1./(sy1*sy1)+1./(sy2*sy2));
2159 Double_t dz0 = (forwardtrack->GetDz(i)/(sz1*sz1) +backtrack->GetDz(i)/(sz2*sz2))/(1./(sz1*sz1)+1./(sz2*sz2));
e43c066c 2160 //
2161 Double_t nz0 = dz0*TMath::Sqrt((1./(sz1*sz1)+1./(sz2*sz2)));
2162 Double_t ny0 = dy0*TMath::Sqrt((1./(sy1*sy1)+1./(sy2*sy2)));
2163 //
2164 res+= nz0*nz0+ny0*ny0;
2165 npoints++;
2166 }
2167 if (npoints>1) return
2168 TMath::Max(TMath::Abs(0.3*forwardtrack->Get1Pt())-0.5,0.)+
2169 //2*forwardtrack->fNUsed+
b9671574 2170 res/TMath::Max(double(npoints-forwardtrack->GetNSkipped()),
2171 1./(1.+forwardtrack->GetNSkipped()));
e43c066c 2172 return 1000;
2173}
2174
2175
2176
2177
2178
2179Float_t *AliITStrackerMI::GetWeight(Int_t index) {
2180 //--------------------------------------------------------------------
2181 // Return pointer to a given cluster
2182 //--------------------------------------------------------------------
2183 Int_t l=(index & 0xf0000000) >> 28;
2184 Int_t c=(index & 0x0fffffff) >> 00;
2185 return fgLayers[l].GetWeight(c);
2186}
2187
15dd636f 2188void AliITStrackerMI::RegisterClusterTracks(AliITStrackMI* track,Int_t id)
e43c066c 2189{
2190 //---------------------------------------------
2191 // register track to the list
628e7bb0 2192 //
b9671574 2193 if (track->GetESDtrack()->GetKinkIndex(0)!=0) return; //don't register kink tracks
628e7bb0 2194 //
2195 //
e43c066c 2196 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2197 Int_t index = track->GetClusterIndex(icluster);
2198 Int_t l=(index & 0xf0000000) >> 28;
2199 Int_t c=(index & 0x0fffffff) >> 00;
b9671574 2200 if (c>fgLayers[l].GetNumberOfClusters()) continue;
e43c066c 2201 for (Int_t itrack=0;itrack<4;itrack++){
b9671574 2202 if (fgLayers[l].GetClusterTracks(itrack,c)<0){
2203 fgLayers[l].SetClusterTracks(itrack,c,id);
e43c066c 2204 break;
2205 }
2206 }
2207 }
2208}
15dd636f 2209void AliITStrackerMI::UnRegisterClusterTracks(AliITStrackMI* track, Int_t id)
e43c066c 2210{
2211 //---------------------------------------------
2212 // unregister track from the list
2213 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2214 Int_t index = track->GetClusterIndex(icluster);
2215 Int_t l=(index & 0xf0000000) >> 28;
2216 Int_t c=(index & 0x0fffffff) >> 00;
b9671574 2217 if (c>fgLayers[l].GetNumberOfClusters()) continue;
e43c066c 2218 for (Int_t itrack=0;itrack<4;itrack++){
b9671574 2219 if (fgLayers[l].GetClusterTracks(itrack,c)==id){
2220 fgLayers[l].SetClusterTracks(itrack,c,-1);
e43c066c 2221 }
2222 }
2223 }
2224}
00a7cc50 2225Float_t AliITStrackerMI::GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSRecPoint *clist[6])
e43c066c 2226{
2227 //-------------------------------------------------------------
2228 //get number of shared clusters
2229 //-------------------------------------------------------------
2230 Float_t shared=0;
2231 for (Int_t i=0;i<6;i++) { list[i]=-1, clist[i]=0;}
2232 // mean number of clusters
2233 Float_t *ny = GetNy(id), *nz = GetNz(id);
2234
2235
2236 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2237 Int_t index = track->GetClusterIndex(icluster);
2238 Int_t l=(index & 0xf0000000) >> 28;
2239 Int_t c=(index & 0x0fffffff) >> 00;
b9671574 2240 if (c>fgLayers[l].GetNumberOfClusters()) continue;
e43c066c 2241 if (ny[l]==0){
2242 printf("problem\n");
2243 }
00a7cc50 2244 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
e43c066c 2245 Float_t weight=1;
2246 //
2247 Float_t deltan = 0;
2248 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
b9671574 2249 if (l>2&&track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
e43c066c 2250 if (l<2 || l>3){
2251 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2252 }
2253 else{
2254 deltan = (cl->GetNz()-nz[l]);
2255 }
2256 if (deltan>2.0) continue; // extended - highly probable shared cluster
2257 weight = 2./TMath::Max(3.+deltan,2.);
2258 //
2259 for (Int_t itrack=0;itrack<4;itrack++){
b9671574 2260 if (fgLayers[l].GetClusterTracks(itrack,c)>=0 && fgLayers[l].GetClusterTracks(itrack,c)!=id){
e43c066c 2261 list[l]=index;
00a7cc50 2262 clist[l] = (AliITSRecPoint*)GetCluster(index);
e43c066c 2263 shared+=weight;
2264 break;
2265 }
2266 }
2267 }
b9671574 2268 track->SetNUsed(shared);
e43c066c 2269 return shared;
2270}
2271
15dd636f 2272Int_t AliITStrackerMI::GetOverlapTrack(AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6],Int_t overlist[6])
e43c066c 2273{
2274 //
2275 // find first shared track
2276 //
2277 // mean number of clusters
2278 Float_t *ny = GetNy(trackID), *nz = GetNz(trackID);
2279 //
2280 for (Int_t i=0;i<6;i++) overlist[i]=-1;
2281 Int_t sharedtrack=100000;
2282 Int_t tracks[24],trackindex=0;
2283 for (Int_t i=0;i<24;i++) {tracks[i]=-1;}
2284 //
2285 for (Int_t icluster=0;icluster<6;icluster++){
2286 if (clusterlist[icluster]<0) continue;
2287 Int_t index = clusterlist[icluster];
2288 Int_t l=(index & 0xf0000000) >> 28;
2289 Int_t c=(index & 0x0fffffff) >> 00;
2290 if (ny[l]==0){
2291 printf("problem\n");
2292 }
b9671574 2293 if (c>fgLayers[l].GetNumberOfClusters()) continue;
e43c066c 2294 //if (l>3) continue;
00a7cc50 2295 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
e43c066c 2296 //
2297 Float_t deltan = 0;
2298 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
b9671574 2299 if (l>2&&track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
e43c066c 2300 if (l<2 || l>3){
2301 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2302 }
2303 else{
2304 deltan = (cl->GetNz()-nz[l]);
2305 }
2306 if (deltan>2.0) continue; // extended - highly probable shared cluster
2307 //
2308 for (Int_t itrack=3;itrack>=0;itrack--){
b9671574 2309 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2310 if (fgLayers[l].GetClusterTracks(itrack,c)!=trackID){
2311 tracks[trackindex] = fgLayers[l].GetClusterTracks(itrack,c);
e43c066c 2312 trackindex++;
2313 }
2314 }
2315 }
2316 if (trackindex==0) return -1;
2317 if (trackindex==1){
2318 sharedtrack = tracks[0];
2319 }else{
2320 if (trackindex==2) sharedtrack =TMath::Min(tracks[0],tracks[1]);
2321 else{
2322 //
2323 Int_t track[24], cluster[24];
2324 for (Int_t i=0;i<trackindex;i++){ track[i]=-1; cluster[i]=0;}
2325 Int_t index =0;
2326 //
2327 for (Int_t i=0;i<trackindex;i++){
2328 if (tracks[i]<0) continue;
2329 track[index] = tracks[i];
2330 cluster[index]++;
2331 for (Int_t j=i+1;j<trackindex;j++){
2332 if (tracks[j]<0) continue;
2333 if (tracks[j]==tracks[i]){
2334 cluster[index]++;
2335 tracks[j]=-1;
2336 }
2337 }
2338 index++;
2339 }
2340 Int_t max=0;
2341 for (Int_t i=0;i<index;i++){
2342 if (cluster[index]>max) {
2343 sharedtrack=track[index];
2344 max=cluster[index];
2345 }
2346 }
2347 }
2348 }
2349
2350 if (sharedtrack>=100000) return -1;
2351 //
2352 // make list of overlaps
2353 shared =0;
2354 for (Int_t icluster=0;icluster<6;icluster++){
2355 if (clusterlist[icluster]<0) continue;
2356 Int_t index = clusterlist[icluster];
2357 Int_t l=(index & 0xf0000000) >> 28;
2358 Int_t c=(index & 0x0fffffff) >> 00;
b9671574 2359 if (c>fgLayers[l].GetNumberOfClusters()) continue;
00a7cc50 2360 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
e43c066c 2361 if (l==0 || l==1){
2362 if (cl->GetNy()>2) continue;
2363 if (cl->GetNz()>2) continue;
2364 }
2365 if (l==4 || l==5){
2366 if (cl->GetNy()>3) continue;
2367 if (cl->GetNz()>3) continue;
2368 }
2369 //
2370 for (Int_t itrack=3;itrack>=0;itrack--){
b9671574 2371 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2372 if (fgLayers[l].GetClusterTracks(itrack,c)==sharedtrack){
e43c066c 2373 overlist[l]=index;
2374 shared++;
2375 }
2376 }
2377 }
2378 return sharedtrack;
2379}
2380
2381
15dd636f 2382AliITStrackMI * AliITStrackerMI::GetBest2Tracks(Int_t trackID1, Int_t trackID2, Float_t th0, Float_t th1){
e43c066c 2383 //
2384 // try to find track hypothesys without conflicts
2385 // with minimal chi2;
2386 TClonesArray *arr1 = (TClonesArray*)fTrackHypothesys.At(trackID1);
2387 Int_t entries1 = arr1->GetEntriesFast();
2388 TClonesArray *arr2 = (TClonesArray*)fTrackHypothesys.At(trackID2);
15dd636f 2389 if (!arr2) return (AliITStrackMI*) arr1->UncheckedAt(0);
e43c066c 2390 Int_t entries2 = arr2->GetEntriesFast();
15dd636f 2391 if (entries2<=0) return (AliITStrackMI*) arr1->UncheckedAt(0);
e43c066c 2392 //
15dd636f 2393 AliITStrackMI * track10=(AliITStrackMI*) arr1->UncheckedAt(0);
2394 AliITStrackMI * track20=(AliITStrackMI*) arr2->UncheckedAt(0);
e43c066c 2395 if (TMath::Abs(1./track10->Get1Pt())>0.5+TMath::Abs(1/track20->Get1Pt())) return track10;
2396
2397 for (Int_t itrack=0;itrack<entries1;itrack++){
15dd636f 2398 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
e43c066c 2399 UnRegisterClusterTracks(track,trackID1);
2400 }
2401 //
2402 for (Int_t itrack=0;itrack<entries2;itrack++){
15dd636f 2403 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
e43c066c 2404 UnRegisterClusterTracks(track,trackID2);
2405 }
2406 Int_t index1=0;
2407 Int_t index2=0;
2408 Float_t maxconflicts=6;
2409 Double_t maxchi2 =1000.;
2410 //
2411 // get weight of hypothesys - using best hypothesy
2412 Double_t w1,w2;
2413
2414 Int_t list1[6],list2[6];
00a7cc50 2415 AliITSRecPoint *clist1[6], *clist2[6] ;
e43c066c 2416 RegisterClusterTracks(track10,trackID1);
2417 RegisterClusterTracks(track20,trackID2);
2418 Float_t conflict1 = GetNumberOfSharedClusters(track10,trackID1,list1,clist1);
2419 Float_t conflict2 = GetNumberOfSharedClusters(track20,trackID2,list2,clist2);
2420 UnRegisterClusterTracks(track10,trackID1);
2421 UnRegisterClusterTracks(track20,trackID2);
2422 //
2423 // normalized chi2
2424 Float_t chi21 =0,chi22=0,ncl1=0,ncl2=0;
2425 Float_t nerry[6],nerrz[6];
2426 Float_t *erry1=GetErrY(trackID1),*errz1 = GetErrZ(trackID1);
2427 Float_t *erry2=GetErrY(trackID2),*errz2 = GetErrZ(trackID2);
2428 for (Int_t i=0;i<6;i++){
2429 if ( (erry1[i]>0) && (erry2[i]>0)) {
2430 nerry[i] = TMath::Min(erry1[i],erry2[i]);
2431 nerrz[i] = TMath::Min(errz1[i],errz2[i]);
2432 }else{
2433 nerry[i] = TMath::Max(erry1[i],erry2[i]);
2434 nerrz[i] = TMath::Max(errz1[i],errz2[i]);
2435 }
b9671574 2436 if (TMath::Abs(track10->GetDy(i))>0.000000000000001){
2437 chi21 += track10->GetDy(i)*track10->GetDy(i)/(nerry[i]*nerry[i]);
2438 chi21 += track10->GetDz(i)*track10->GetDz(i)/(nerrz[i]*nerrz[i]);
e43c066c 2439 ncl1++;
2440 }
b9671574 2441 if (TMath::Abs(track20->GetDy(i))>0.000000000000001){
2442 chi22 += track20->GetDy(i)*track20->GetDy(i)/(nerry[i]*nerry[i]);
2443 chi22 += track20->GetDz(i)*track20->GetDz(i)/(nerrz[i]*nerrz[i]);
e43c066c 2444 ncl2++;
2445 }
2446 }
2447 chi21/=ncl1;
2448 chi22/=ncl2;
2449 //
2450 //
b9671574 2451 Float_t d1 = TMath::Sqrt(track10->GetD(0)*track10->GetD(0)+track10->GetD(1)*track10->GetD(1))+0.1;
2452 Float_t d2 = TMath::Sqrt(track20->GetD(0)*track20->GetD(0)+track20->GetD(1)*track20->GetD(1))+0.1;
e43c066c 2453 Float_t s1 = TMath::Sqrt(track10->GetSigmaY2()*track10->GetSigmaZ2());
2454 Float_t s2 = TMath::Sqrt(track20->GetSigmaY2()*track20->GetSigmaZ2());
2455 //
2456 w1 = (d2/(d1+d2)+ 2*s2/(s1+s2)+
2457 +s2/(s1+s2)*0.5*(chi22+2.)/(chi21+chi22+4.)
2458 +1.*TMath::Abs(1./track10->Get1Pt())/(TMath::Abs(1./track10->Get1Pt())+TMath::Abs(1./track20->Get1Pt()))
2459 );
2460 w2 = (d1/(d1+d2)+ 2*s1/(s1+s2)+
2461 s1/(s1+s2)*0.5*(chi21+2.)/(chi21+chi22+4.)
2462 +1.*TMath::Abs(1./track20->Get1Pt())/(TMath::Abs(1./track10->Get1Pt())+TMath::Abs(1./track20->Get1Pt()))
2463 );
2464
2465 Double_t sumw = w1+w2;
2466 w1/=sumw;
2467 w2/=sumw;
2468 if (w1<w2*0.5) {
2469 w1 = (d2+0.5)/(d1+d2+1.);
2470 w2 = (d1+0.5)/(d1+d2+1.);
2471 }
2472 // Float_t maxmax = w1*track10->fChi2MIP[0]+w2*track20->fChi2MIP[0]+w1*conflict1+w2*conflict2+1.;
2473 //Float_t maxconflicts0 = w1*conflict1+w2*conflict2;
2474 //
2475 // get pair of "best" hypothesys
2476 //
2477 Float_t * ny1 = GetNy(trackID1), * nz1 = GetNz(trackID1);
2478 Float_t * ny2 = GetNy(trackID2), * nz2 = GetNz(trackID2);
2479
2480 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
15dd636f 2481 AliITStrackMI * track1=(AliITStrackMI*) arr1->UncheckedAt(itrack1);
e43c066c 2482 //if (track1->fFakeRatio>0) continue;
2483 RegisterClusterTracks(track1,trackID1);
2484 for (Int_t itrack2=0;itrack2<entries2;itrack2++){
15dd636f 2485 AliITStrackMI * track2=(AliITStrackMI*) arr2->UncheckedAt(itrack2);
e43c066c 2486
2487 // Float_t current = w1*track1->fChi2MIP[0]+w2*track2->fChi2MIP[0];
2488 //if (track2->fFakeRatio>0) continue;
2489 Float_t nskipped=0;
2490 RegisterClusterTracks(track2,trackID2);
2491 Int_t list1[6],list2[6];
00a7cc50 2492 AliITSRecPoint *clist1[6], *clist2[6] ;
e43c066c 2493 Float_t cconflict1 = GetNumberOfSharedClusters(track1,trackID1,list1,clist1);
2494 Float_t cconflict2 = GetNumberOfSharedClusters(track2,trackID2,list2,clist2);
2495 UnRegisterClusterTracks(track2,trackID2);
2496 //
b9671574 2497 if (track1->GetConstrain()) nskipped+=w1*track1->GetNSkipped();
2498 if (track2->GetConstrain()) nskipped+=w2*track2->GetNSkipped();
e43c066c 2499 if (nskipped>0.5) continue;
2500 //
2501 //if ( w1*conflict1+w2*conflict2>maxconflicts0) continue;
2502 if (conflict1+1<cconflict1) continue;
2503 if (conflict2+1<cconflict2) continue;
2504 Float_t conflict=0;
2505 Float_t sumchi2=0;
2506 Float_t sum=0;
2507 for (Int_t i=0;i<6;i++){
2508 //
2509 Float_t c1 =0.; // conflict coeficients
2510 Float_t c2 =0.;
2511 if (clist1[i]&&clist2[i]){
2512 Float_t deltan = 0;
2513 if (i<2 || i>3){
2514 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-TMath::Max(ny1[i],ny2[i])-TMath::Max(nz1[i],nz2[i]));
2515 }
2516 else{
2517 deltan = (clist1[i]->GetNz()-TMath::Max(nz1[i],nz2[i]));
2518 }
2519 c1 = 2./TMath::Max(3.+deltan,2.);
2520 c2 = 2./TMath::Max(3.+deltan,2.);
2521 }
2522 else{
2523 if (clist1[i]){
2524 Float_t deltan = 0;
2525 if (i<2 || i>3){
2526 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-ny1[i]-nz1[i]);
2527 }
2528 else{
2529 deltan = (clist1[i]->GetNz()-nz1[i]);
2530 }
2531 c1 = 2./TMath::Max(3.+deltan,2.);
2532 c2 = 0;
2533 }
2534
2535 if (clist2[i]){
2536 Float_t deltan = 0;
2537 if (i<2 || i>3){
2538 deltan = (clist2[i]->GetNy()+clist2[i]->GetNz()-ny2[i]-nz2[i]);
2539 }
2540 else{
2541 deltan = (clist2[i]->GetNz()-nz2[i]);
2542 }
2543 c2 = 2./TMath::Max(3.+deltan,2.);
2544 c1 = 0;
2545 }
2546 }
2547 //
2548 Double_t chi21=0,chi22=0;
b9671574 2549 if (TMath::Abs(track1->GetDy(i))>0.) {
2550 chi21 = (track1->GetDy(i)/track1->GetSigmaY(i))*(track1->GetDy(i)/track1->GetSigmaY(i))+
2551 (track1->GetDz(i)/track1->GetSigmaZ(i))*(track1->GetDz(i)/track1->GetSigmaZ(i));
e43c066c 2552 //chi21 = (track1->fDy[i]*track1->fDy[i])/(nerry[i]*nerry[i])+
b9671574 2553 // (track1->GetDz(i)*track1->GetDz(i))/(nerrz[i]*nerrz[i]);
e43c066c 2554 }else{
b9671574 2555 if (TMath::Abs(track1->GetSigmaY(i)>0.)) c1=1;
e43c066c 2556 }
2557 //
b9671574 2558 if (TMath::Abs(track2->GetDy(i))>0.) {
2559 chi22 = (track2->GetDy(i)/track2->GetSigmaY(i))*(track2->GetDy(i)/track2->GetSigmaY(i))+
2560 (track2->GetDz(i)/track2->GetSigmaZ(i))*(track2->GetDz(i)/track2->GetSigmaZ(i));
e43c066c 2561 //chi22 = (track2->fDy[i]*track2->fDy[i])/(nerry[i]*nerry[i])+
2562 // (track2->fDz[i]*track2->fDz[i])/(nerrz[i]*nerrz[i]);
2563 }
2564 else{
b9671574 2565 if (TMath::Abs(track2->GetSigmaY(i)>0.)) c2=1;
e43c066c 2566 }
2567 sumchi2+=w1*(1.+c1)*(1+c1)*(chi21+c1)+w2*(1.+c2)*(1+c2)*(chi22+c2);
2568 if (chi21>0) sum+=w1;
2569 if (chi22>0) sum+=w2;
2570 conflict+=(c1+c2);
2571 }
b9671574 2572 Double_t norm = sum-w1*track1->GetNSkipped()-w2*track2->GetNSkipped();
2573 if (norm<0) norm =1/(w1*track1->GetNSkipped()+w2*track2->GetNSkipped());
e43c066c 2574 Double_t normchi2 = 2*conflict+sumchi2/sum;
2575 if ( normchi2 <maxchi2 ){
2576 index1 = itrack1;
2577 index2 = itrack2;
2578 maxconflicts = conflict;
2579 maxchi2 = normchi2;
2580 }
2581 }
2582 UnRegisterClusterTracks(track1,trackID1);
2583 }
2584 //
2585 // if (maxconflicts<4 && maxchi2<th0){
2586 if (maxchi2<th0*2.){
b9671574 2587 Float_t orig = track10->GetFakeRatio()*track10->GetNumberOfClusters();
15dd636f 2588 AliITStrackMI* track1=(AliITStrackMI*) arr1->UncheckedAt(index1);
b9671574 2589 track1->SetChi2MIP(5,maxconflicts);
2590 track1->SetChi2MIP(6,maxchi2);
2591 track1->SetChi2MIP(7,0.01+orig-(track1->GetFakeRatio()*track1->GetNumberOfClusters()));
e43c066c 2592 // track1->UpdateESDtrack(AliESDtrack::kITSin);
b9671574 2593 track1->SetChi2MIP(8,index1);
e43c066c 2594 fBestTrackIndex[trackID1] =index1;
2595 UpdateESDtrack(track1, AliESDtrack::kITSin);
2596 }
b9671574 2597 else if (track10->GetChi2MIP(0)<th1){
2598 track10->SetChi2MIP(5,maxconflicts);
2599 track10->SetChi2MIP(6,maxchi2);
e43c066c 2600 // track10->UpdateESDtrack(AliESDtrack::kITSin);
2601 UpdateESDtrack(track10,AliESDtrack::kITSin);
2602 }
2603
2604 for (Int_t itrack=0;itrack<entries1;itrack++){
15dd636f 2605 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
e43c066c 2606 UnRegisterClusterTracks(track,trackID1);
2607 }
2608 //
2609 for (Int_t itrack=0;itrack<entries2;itrack++){
15dd636f 2610 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
e43c066c 2611 UnRegisterClusterTracks(track,trackID2);
2612 }
2613
b9671574 2614 if (track10->GetConstrain()&&track10->GetChi2MIP(0)<kMaxChi2PerCluster[0]&&track10->GetChi2MIP(1)<kMaxChi2PerCluster[1]
2615 &&track10->GetChi2MIP(2)<kMaxChi2PerCluster[2]&&track10->GetChi2MIP(3)<kMaxChi2PerCluster[3]){
e43c066c 2616 // if (track10->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track10->fChi2MIP[1]<kMaxChi2PerCluster[1]
2617 // &&track10->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track10->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2618 RegisterClusterTracks(track10,trackID1);
2619 }
b9671574 2620 if (track20->GetConstrain()&&track20->GetChi2MIP(0)<kMaxChi2PerCluster[0]&&track20->GetChi2MIP(1)<kMaxChi2PerCluster[1]
2621 &&track20->GetChi2MIP(2)<kMaxChi2PerCluster[2]&&track20->GetChi2MIP(3)<kMaxChi2PerCluster[3]){
e43c066c 2622 //if (track20->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track20->fChi2MIP[1]<kMaxChi2PerCluster[1]
2623 // &&track20->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track20->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2624 RegisterClusterTracks(track20,trackID2);
2625 }
2626 return track10;
2627
2628}
2629
2630void AliITStrackerMI::UseClusters(const AliKalmanTrack *t, Int_t from) const {
2631 //--------------------------------------------------------------------
2632 // This function marks clusters assigned to the track
2633 //--------------------------------------------------------------------
2634 AliTracker::UseClusters(t,from);
2635
00a7cc50 2636 AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(0));
e43c066c 2637 //if (c->GetQ()>2) c->Use();
2638 if (c->GetSigmaZ2()>0.1) c->Use();
00a7cc50 2639 c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(1));
e43c066c 2640 //if (c->GetQ()>2) c->Use();
2641 if (c->GetSigmaZ2()>0.1) c->Use();
2642
2643}
2644
2645
15dd636f 2646void AliITStrackerMI::AddTrackHypothesys(AliITStrackMI * track, Int_t esdindex)
e43c066c 2647{
2648 //------------------------------------------------------------------
2649 // add track to the list of hypothesys
2650 //------------------------------------------------------------------
2651
2652 if (esdindex>=fTrackHypothesys.GetEntriesFast()) fTrackHypothesys.Expand(esdindex*2+10);
2653 //
2654 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2655 if (!array) {
2656 array = new TObjArray(10);
2657 fTrackHypothesys.AddAt(array,esdindex);
2658 }
2659 array->AddLast(track);
2660}
2661
2662void AliITStrackerMI::SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode)
2663{
2664 //-------------------------------------------------------------------
2665 // compress array of track hypothesys
2666 // keep only maxsize best hypothesys
2667 //-------------------------------------------------------------------
2668 if (esdindex>fTrackHypothesys.GetEntriesFast()) return;
2669 if (! (fTrackHypothesys.At(esdindex)) ) return;
2670 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2671 Int_t entries = array->GetEntriesFast();
2672 //
2673 //- find preliminary besttrack as a reference
2674 Float_t minchi2=10000;
2675 Int_t maxn=0;
15dd636f 2676 AliITStrackMI * besttrack=0;
e43c066c 2677 for (Int_t itrack=0;itrack<array->GetEntriesFast();itrack++){
15dd636f 2678 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2679 if (!track) continue;
2680 Float_t chi2 = NormalizedChi2(track,0);
2681 //
b9671574 2682 Int_t tpcLabel=track->GetESDtrack()->GetTPCLabel();
e43c066c 2683 track->SetLabel(tpcLabel);
2684 CookdEdx(track);
b9671574 2685 track->SetFakeRatio(1.);
e43c066c 2686 CookLabel(track,0.); //For comparison only
2687 //
2688 //if (chi2<kMaxChi2PerCluster[0]&&track->fFakeRatio==0){
2689 if (chi2<kMaxChi2PerCluster[0]){
2690 if (track->GetNumberOfClusters()<maxn) continue;
2691 maxn = track->GetNumberOfClusters();
2692 if (chi2<minchi2){
2693 minchi2=chi2;
2694 besttrack=track;
2695 }
2696 }
2697 else{
b9671574 2698 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
628e7bb0 2699 delete array->RemoveAt(itrack);
2700 }
e43c066c 2701 }
2702 }
2703 if (!besttrack) return;
2704 //
2705 //
2706 //take errors of best track as a reference
2707 Float_t *erry = GetErrY(esdindex), *errz = GetErrZ(esdindex);
2708 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
2709 for (Int_t i=0;i<6;i++) {
b9671574 2710 if (besttrack->GetClIndex(i)>0){
2711 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2712 errz[i] = besttrack->GetSigmaZ(i); errz[i+6] = besttrack->GetSigmaZ(i+6);
2713 ny[i] = besttrack->GetNy(i);
2714 nz[i] = besttrack->GetNz(i);
e43c066c 2715 }
2716 }
2717 //
2718 // calculate normalized chi2
2719 //
2720 Float_t * chi2 = new Float_t[entries];
2721 Int_t * index = new Int_t[entries];
2722 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2723 for (Int_t itrack=0;itrack<entries;itrack++){
15dd636f 2724 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2725 if (track){
b9671574 2726 track->SetChi2MIP(0,GetNormalizedChi2(track, mode));
2727 if (track->GetChi2MIP(0)<kMaxChi2PerCluster[0])
2728 chi2[itrack] = track->GetChi2MIP(0);
628e7bb0 2729 else{
b9671574 2730 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
628e7bb0 2731 delete array->RemoveAt(itrack);
2732 }
2733 }
e43c066c 2734 }
2735 }
2736 //
2737 TMath::Sort(entries,chi2,index,kFALSE);
15dd636f 2738 besttrack = (AliITStrackMI*)array->At(index[0]);
b9671574 2739 if (besttrack&&besttrack->GetChi2MIP(0)<kMaxChi2PerCluster[0]){
e43c066c 2740 for (Int_t i=0;i<6;i++){
b9671574 2741 if (besttrack->GetClIndex(i)>0){
2742 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2743 errz[i] = besttrack->GetSigmaZ(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2744 ny[i] = besttrack->GetNy(i);
2745 nz[i] = besttrack->GetNz(i);
e43c066c 2746 }
2747 }
2748 }
2749 //
2750 // calculate one more time with updated normalized errors
2751 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2752 for (Int_t itrack=0;itrack<entries;itrack++){
15dd636f 2753 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2754 if (track){
b9671574 2755 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
2756 if (track->GetChi2MIP(0)<kMaxChi2PerCluster[0])
2757 chi2[itrack] = track->GetChi2MIP(0)-0*(track->GetNumberOfClusters()+track->GetNDeadZone());
628e7bb0 2758 else
2759 {
b9671574 2760 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
628e7bb0 2761 delete array->RemoveAt(itrack);
2762 }
2763 }
e43c066c 2764 }
2765 }
2766 entries = array->GetEntriesFast();
2767 //
628e7bb0 2768 //
e43c066c 2769 if (entries>0){
2770 TObjArray * newarray = new TObjArray();
2771 TMath::Sort(entries,chi2,index,kFALSE);
15dd636f 2772 besttrack = (AliITStrackMI*)array->At(index[0]);
e43c066c 2773 if (besttrack){
2774 //
2775 for (Int_t i=0;i<6;i++){
b9671574 2776 if (besttrack->GetNz(i)>0&&besttrack->GetNy(i)>0){
2777 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2778 errz[i] = besttrack->GetSigmaZ(i); errz[i+6] = besttrack->GetSigmaZ(i+6);
2779 ny[i] = besttrack->GetNy(i);
2780 nz[i] = besttrack->GetNz(i);
e43c066c 2781 }
2782 }
b9671574 2783 besttrack->SetChi2MIP(0,GetNormalizedChi2(besttrack,mode));
2784 Float_t minchi2 = TMath::Min(besttrack->GetChi2MIP(0)+5.+besttrack->GetNUsed(), double(kMaxChi2PerCluster[0]));
e43c066c 2785 Float_t minn = besttrack->GetNumberOfClusters()-3;
2786 Int_t accepted=0;
2787 for (Int_t i=0;i<entries;i++){
15dd636f 2788 AliITStrackMI * track = (AliITStrackMI*)array->At(index[i]);
e43c066c 2789 if (!track) continue;
2790 if (accepted>maxcut) break;
b9671574 2791 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
2792 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
2793 if (track->GetNumberOfClusters()<6 && (track->GetChi2MIP(0)+track->GetNUsed()>minchi2)){
628e7bb0 2794 delete array->RemoveAt(index[i]);
2795 continue;
2796 }
e43c066c 2797 }
b9671574 2798 Bool_t shortbest = !track->GetConstrain() && track->GetNumberOfClusters()<6;
2799 if ((track->GetChi2MIP(0)+track->GetNUsed()<minchi2 && track->GetNumberOfClusters()>=minn) ||shortbest){
628e7bb0 2800 if (!shortbest) accepted++;
e43c066c 2801 //
2802 newarray->AddLast(array->RemoveAt(index[i]));
2803 for (Int_t i=0;i<6;i++){
2804 if (nz[i]==0){
b9671574 2805 erry[i] = track->GetSigmaY(i); erry[i+6] = track->GetSigmaY(i+6);
2806 errz[i] = track->GetSigmaZ(i); errz[i] = track->GetSigmaZ(i+6);
2807 ny[i] = track->GetNy(i);
2808 nz[i] = track->GetNz(i);
e43c066c 2809 }
2810 }
2811 }
2812 else{
2813 delete array->RemoveAt(index[i]);
2814 }
2815 }
2816 array->Delete();
2817 delete fTrackHypothesys.RemoveAt(esdindex);
2818 fTrackHypothesys.AddAt(newarray,esdindex);
2819 }
2820 else{
2821 array->Delete();
2822 delete fTrackHypothesys.RemoveAt(esdindex);
2823 }
2824 }
2825 delete [] chi2;
2826 delete [] index;
2827}
2828
2829
2830
15dd636f 2831AliITStrackMI * AliITStrackerMI::GetBestHypothesys(Int_t esdindex, AliITStrackMI * original, Int_t checkmax)
e43c066c 2832{
2833 //-------------------------------------------------------------
2834 // try to find best hypothesy
2835 // currently - minimal chi2 of track+backpropagated track+matching to the tpc track
2836 //-------------------------------------------------------------
2837 if (fTrackHypothesys.GetEntriesFast()<=esdindex) return 0;
2838 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2839 if (!array) return 0;
2840 Int_t entries = array->GetEntriesFast();
2841 if (!entries) return 0;
2842 Float_t minchi2 = 100000;
15dd636f 2843 AliITStrackMI * besttrack=0;
e43c066c 2844 //
15dd636f 2845 AliITStrackMI * backtrack = new AliITStrackMI(*original);
2846 AliITStrackMI * forwardtrack = new AliITStrackMI(*original);
628e7bb0 2847 Double_t xyzv[]={GetX(),GetY(),GetZ()};
2848 Double_t ersv[]={GetSigmaX()/3.,GetSigmaY()/3.,GetSigmaZ()/3.};
e43c066c 2849 //
2850 for (Int_t i=0;i<entries;i++){
15dd636f 2851 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
e43c066c 2852 if (!track) continue;
628e7bb0 2853 Float_t sigmarfi,sigmaz;
2854 GetDCASigma(track,sigmarfi,sigmaz);
b9671574 2855 track->SetDnorm(0,sigmarfi);
2856 track->SetDnorm(1,sigmaz);
628e7bb0 2857 //
b9671574 2858 track->SetChi2MIP(1,1000000);
2859 track->SetChi2MIP(2,1000000);
2860 track->SetChi2MIP(3,1000000);
e43c066c 2861 //
2862 // backtrack
15dd636f 2863 backtrack = new(backtrack) AliITStrackMI(*track);
b9671574 2864 if (track->GetConstrain()){
628e7bb0 2865 if (!backtrack->PropagateTo(3.,0.0028,65.19)) continue;
2866 if (!backtrack->Improve(0,xyzv,ersv)) continue;
6c94f330 2867 //if (!backtrack->PropagateTo(2.,0.0028,0)) continue; // This
2868 //if (!backtrack->Improve(0,xyzv,ersv)) continue; // is
2869 //if (!backtrack->PropagateTo(1.,0.0028,0)) continue; // an over-kill
2870 //if (!backtrack->Improve(0,xyzv,ersv)) continue; // (I.B.)
2871 //if (!backtrack->PropagateToVertex()) continue; //
2872 backtrack->ResetCovariance(10.);
2873 //if (!backtrack->Improve(0,xyzv,ersv)) continue;
628e7bb0 2874 }else{
6c94f330 2875 backtrack->ResetCovariance(10.);
628e7bb0 2876 }
e43c066c 2877 backtrack->ResetClusters();
628e7bb0 2878
e43c066c 2879 Double_t x = original->GetX();
2880 if (!RefitAt(x,backtrack,track)) continue;
628e7bb0 2881 //
b9671574 2882 track->SetChi2MIP(1,NormalizedChi2(backtrack,0));
e43c066c 2883 //for (Int_t i=2;i<6;i++){track->fDy[i]+=backtrack->fDy[i]; track->fDz[i]+=backtrack->fDz[i];}
b9671574 2884 if (track->GetChi2MIP(1)>kMaxChi2PerCluster[1]*6.) continue;
2885 track->SetChi22(GetMatchingChi2(backtrack,original));
e43c066c 2886
b9671574 2887 if ((track->GetConstrain()) && track->GetChi22()>90.) continue;
2888 if ((!track->GetConstrain()) && track->GetChi22()>30.) continue;
2889 if ( track->GetChi22()/track->GetNumberOfClusters()>11.) continue;
e43c066c 2890
2891
b9671574 2892 if (!(track->GetConstrain())&&track->GetChi2MIP(1)>kMaxChi2PerCluster[1]) continue;
e43c066c 2893 Bool_t isOK=kTRUE;
e43c066c 2894 if(!isOK) continue;
2895 //
2896 //forward track - without constraint
15dd636f 2897 forwardtrack = new(forwardtrack) AliITStrackMI(*original);
e43c066c 2898 forwardtrack->ResetClusters();
2899 x = track->GetX();
628e7bb0 2900 RefitAt(x,forwardtrack,track);
b9671574 2901 track->SetChi2MIP(2,NormalizedChi2(forwardtrack,0));
2902 if (track->GetChi2MIP(2)>kMaxChi2PerCluster[2]*6.0) continue;
2903 if (!(track->GetConstrain())&&track->GetChi2MIP(2)>kMaxChi2PerCluster[2]) continue;
e43c066c 2904
791f9a2a 2905 //track->fD[0] = forwardtrack->GetD(GetX(),GetY());
2906 //track->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
b9671574 2907 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),track->GetDP()); //I.B.
2908 forwardtrack->SetD(0,track->GetD(0));
2909 forwardtrack->SetD(1,track->GetD(1));
e43c066c 2910 {
2911 Int_t list[6];
00a7cc50 2912 AliITSRecPoint* clist[6];
b9671574 2913 track->SetChi2MIP(4,GetNumberOfSharedClusters(track,esdindex,list,clist));
2914 if ( (!track->GetConstrain()) && track->GetChi2MIP(4)>1.0) continue;
e43c066c 2915 }
2916
b9671574 2917 track->SetChi2MIP(3,GetInterpolatedChi2(forwardtrack,backtrack));
2918 if ( (track->GetChi2MIP(3)>6.*kMaxChi2PerCluster[3])) continue;
2919 if ( (!track->GetConstrain()) && (track->GetChi2MIP(3)>2*kMaxChi2PerCluster[3])) {
2920 track->SetChi2MIP(3,1000);
e43c066c 2921 continue;
2922 }
b9671574 2923 Double_t chi2 = track->GetChi2MIP(0)+track->GetNUsed();
e43c066c 2924 //
2925 for (Int_t ichi=0;ichi<5;ichi++){
b9671574 2926 forwardtrack->SetChi2MIP(ichi, track->GetChi2MIP(ichi));
e43c066c 2927 }
2928 if (chi2 < minchi2){
15dd636f 2929 //besttrack = new AliITStrackMI(*forwardtrack);
99c2ee26 2930 besttrack = track;
e43c066c 2931 besttrack->SetLabel(track->GetLabel());
b9671574 2932 besttrack->SetFakeRatio(track->GetFakeRatio());
e43c066c 2933 minchi2 = chi2;
791f9a2a 2934 //original->fD[0] = forwardtrack->GetD(GetX(),GetY());
2935 //original->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
b9671574 2936 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),original->GetDP()); //I.B.
e43c066c 2937 }
2938 }
2939 delete backtrack;
2940 delete forwardtrack;
2941 Int_t accepted=0;
2942 for (Int_t i=0;i<entries;i++){
15dd636f 2943 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
e43c066c 2944 if (!track) continue;
628e7bb0 2945
b9671574 2946 if (accepted>checkmax || track->GetChi2MIP(3)>kMaxChi2PerCluster[3]*6. ||
e43c066c 2947 (track->GetNumberOfClusters()<besttrack->GetNumberOfClusters()-1.)||
b9671574 2948 track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*besttrack->GetNUsed()+3.){
2949 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
628e7bb0 2950 delete array->RemoveAt(i);
2951 continue;
2952 }
e43c066c 2953 }
2954 else{
2955 accepted++;
2956 }
2957 }
2958 //
2959 array->Compress();
2960 SortTrackHypothesys(esdindex,checkmax,1);
2961 array = (TObjArray*) fTrackHypothesys.At(esdindex);
afdf9b9c 2962 if (!array) return 0; // PH What can be the reason? Check SortTrackHypothesys
15dd636f 2963 besttrack = (AliITStrackMI*)array->At(0);
e43c066c 2964 if (!besttrack) return 0;
b9671574 2965 besttrack->SetChi2MIP(8,0);
e43c066c 2966 fBestTrackIndex[esdindex]=0;
2967 entries = array->GetEntriesFast();
15dd636f 2968 AliITStrackMI *longtrack =0;
e43c066c 2969 minchi2 =1000;
b9671574 2970 Float_t minn=besttrack->GetNumberOfClusters()+besttrack->GetNDeadZone();
e43c066c 2971 for (Int_t itrack=entries-1;itrack>0;itrack--){
15dd636f 2972 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
b9671574 2973 if (!track->GetConstrain()) continue;
2974 if (track->GetNumberOfClusters()+track->GetNDeadZone()<minn) continue;
2975 if (track->GetChi2MIP(0)-besttrack->GetChi2MIP(0)>0.0) continue;
2976 if (track->GetChi2MIP(0)>4.) continue;
2977 minn = track->GetNumberOfClusters()+track->GetNDeadZone();
e43c066c 2978 longtrack =track;
2979 }
2980 //if (longtrack) besttrack=longtrack;
2981
2982 Int_t list[6];
00a7cc50 2983 AliITSRecPoint * clist[6];
e43c066c 2984 Float_t shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
b9671574 2985 if (besttrack->GetConstrain()&&besttrack->GetChi2MIP(0)<kMaxChi2PerCluster[0]&&besttrack->GetChi2MIP(1)<kMaxChi2PerCluster[1]
2986 &&besttrack->GetChi2MIP(2)<kMaxChi2PerCluster[2]&&besttrack->GetChi2MIP(3)<kMaxChi2PerCluster[3]){
e43c066c 2987 RegisterClusterTracks(besttrack,esdindex);
2988 }
2989 //
2990 //
2991 if (shared>0.0){
2992 Int_t nshared;
2993 Int_t overlist[6];
2994 Int_t sharedtrack = GetOverlapTrack(besttrack, esdindex, nshared, list, overlist);
2995 if (sharedtrack>=0){
2996 //
2997 besttrack = GetBest2Tracks(esdindex,sharedtrack,10,5.5);
2998 if (besttrack){
2999 shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
3000 }
3001 else return 0;
3002 }
3003 }
3004
3005 if (shared>2.5) return 0;
3006 if (shared>1.0) return besttrack;
3007 //
628e7bb0 3008 // Don't sign clusters if not gold track
3009 //
3010 if (!besttrack->IsGoldPrimary()) return besttrack;
b9671574 3011 if (besttrack->GetESDtrack()->GetKinkIndex(0)!=0) return besttrack; //track belong to kink
628e7bb0 3012 //
e43c066c 3013 if (fConstraint[fPass]){
3014 //
3015 // sign clusters
3016 //
3017 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
3018 for (Int_t i=0;i<6;i++){
b9671574 3019 Int_t index = besttrack->GetClIndex(i);
e43c066c 3020 if (index<=0) continue;
3021 Int_t ilayer = (index & 0xf0000000) >> 28;
b9671574 3022 if (besttrack->GetSigmaY(ilayer)<0.00000000001) continue;
00a7cc50 3023 AliITSRecPoint *c = (AliITSRecPoint*)GetCluster(index);
e43c066c 3024 if (!c) continue;
3025 if (ilayer>3&&c->GetNy()+c->GetNz()>6) continue;
3026 if ( (c->GetNy()+c->GetNz() )> ny[i]+nz[i]+0.7) continue; //shared track
3027 if ( c->GetNz()> nz[i]+0.7) continue; //shared track
b9671574 3028 if ( ilayer>2&& besttrack->GetNormQ(ilayer)/besttrack->GetExpQ()>1.5) continue;
e43c066c 3029 //if ( c->GetNy()> ny[i]+0.7) continue; //shared track
3030
3031 Bool_t cansign = kTRUE;
3032 for (Int_t itrack=0;itrack<entries; itrack++){
15dd636f 3033 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
e43c066c 3034 if (!track) continue;
b9671574 3035 if (track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*shared+1.) break;
3036 if ( (track->GetClIndex(ilayer)>0) && (track->GetClIndex(ilayer)!=besttrack->GetClIndex(ilayer))){
e43c066c 3037 cansign = kFALSE;
3038 break;
3039 }
3040 }
3041 if (cansign){
b9671574 3042 if (TMath::Abs(besttrack->GetDy(ilayer)/besttrack->GetSigmaY(ilayer))>3.) continue;
3043 if (TMath::Abs(besttrack->GetDz(ilayer)/besttrack->GetSigmaZ(ilayer))>3.) continue;
e43c066c 3044 if (!c->IsUsed()) c->Use();
3045 }
3046 }
3047 }
3048 return besttrack;
3049}
3050
3051
3052
3053void AliITStrackerMI::GetBestHypothesysMIP(TObjArray &itsTracks)
3054{
3055 //
3056 // get "best" hypothesys
628e7bb0 3057 //
e43c066c 3058
3059 Int_t nentries = itsTracks.GetEntriesFast();
3060 for (Int_t i=0;i<nentries;i++){
15dd636f 3061 AliITStrackMI* track = (AliITStrackMI*)itsTracks.At(i);
e43c066c 3062 if (!track) continue;
3063 TObjArray * array = (TObjArray*) fTrackHypothesys.At(i);
3064 if (!array) continue;
3065 if (array->GetEntriesFast()<=0) continue;
3066 //
15dd636f 3067 AliITStrackMI* longtrack=0;
e43c066c 3068 Float_t minn=0;
3069 Float_t maxchi2=1000;
3070 for (Int_t j=0;j<array->GetEntriesFast();j++){
15dd636f 3071 AliITStrackMI* track = (AliITStrackMI*)array->At(j);
e43c066c 3072 if (!track) continue;
b9671574 3073 if (track->GetGoldV0()) {
628e7bb0 3074 longtrack = track; //gold V0 track taken
3075 break;
3076 }
b9671574 3077 if (track->GetNumberOfClusters()+track->GetNDeadZone()<minn) continue;
3078 Float_t chi2 = track->GetChi2MIP(0);
628e7bb0 3079 if (fAfterV0){
b9671574 3080 if (!track->GetGoldV0()&&track->GetConstrain()==kFALSE) chi2+=5;
628e7bb0 3081 }
b9671574 3082 if (track->GetNumberOfClusters()+track->GetNDeadZone()>minn) maxchi2 = track->GetChi2MIP(0);
628e7bb0 3083 //
3084 if (chi2 > maxchi2) continue;
b9671574 3085 minn= track->GetNumberOfClusters()+track->GetNDeadZone();
628e7bb0 3086 maxchi2 = chi2;
e43c066c 3087 longtrack=track;
e43c066c 3088 }
628e7bb0 3089 //
3090 //
3091 //
15dd636f 3092 AliITStrackMI * besttrack = (AliITStrackMI*)array->At(0);
e43c066c 3093 if (!longtrack) {longtrack = besttrack;}
3094 else besttrack= longtrack;
628e7bb0 3095 //
e43c066c 3096 if (besttrack){
3097 Int_t list[6];
00a7cc50 3098 AliITSRecPoint * clist[6];
e43c066c 3099 Float_t shared = GetNumberOfSharedClusters(longtrack,i,list,clist);
3100 //
b9671574 3101 track->SetNUsed(shared);
3102 track->SetNSkipped(besttrack->GetNSkipped());
3103 track->SetChi2MIP(0,besttrack->GetChi2MIP(0));
e43c066c 3104 if (shared>0){
3105 Int_t nshared;
3106 Int_t overlist[6];
3107 //
3108 Int_t sharedtrack = GetOverlapTrack(longtrack, i, nshared, list, overlist);
3109 //if (sharedtrack==-1) sharedtrack=0;
3110 if (sharedtrack>=0){
3111 besttrack = GetBest2Tracks(i,sharedtrack,10,5.5);
3112 }
3113 }
628e7bb0 3114 if (besttrack&&fAfterV0){
3115 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3116 }
e43c066c 3117 if (besttrack&&fConstraint[fPass])
3118 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3119 //if (besttrack&&besttrack->fConstrain)
3120 // UpdateESDtrack(besttrack,AliESDtrack::kITSin);
b9671574 3121 if (besttrack->GetChi2MIP(0)+besttrack->GetNUsed()>1.5){
3122 if ( (TMath::Abs(besttrack->GetD(0))>0.1) && fConstraint[fPass]) {
3123 track->SetReconstructed(kFALSE);
e43c066c 3124 }
b9671574 3125 if ( (TMath::Abs(besttrack->GetD(1))>0.1) && fConstraint[fPass]){
3126 track->SetReconstructed(kFALSE);
e43c066c 3127 }
3128 }
3129
3130 }
3131 }
3132}
3133
3134
15dd636f 3135void AliITStrackerMI::CookLabel(AliITStrackMI *track,Float_t wrong) const {
e43c066c 3136 //--------------------------------------------------------------------
3137 //This function "cooks" a track label. If label<0, this track is fake.
3138 //--------------------------------------------------------------------
3139 Int_t tpcLabel=-1;
3140
b9671574 3141 if ( track->GetESDtrack()) tpcLabel = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
e43c066c 3142
b9671574 3143 track->SetChi2MIP(9,0);
e43c066c 3144 Int_t nwrong=0;
3145 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3146 Int_t cindex = track->GetClusterIndex(i);
3147 Int_t l=(cindex & 0xf0000000) >> 28;
00a7cc50 3148 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
e43c066c 3149 Int_t isWrong=1;
3150 for (Int_t ind=0;ind<3;ind++){
3151 if (tpcLabel>0)
3152 if (cl->GetLabel(ind)==tpcLabel) isWrong=0;
3153 }
b9671574 3154 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
e43c066c 3155 nwrong+=isWrong;
3156 }
b9671574 3157 track->SetFakeRatio(double(nwrong)/double(track->GetNumberOfClusters()));
e43c066c 3158 if (tpcLabel>0){
b9671574 3159 if (track->GetFakeRatio()>wrong) track->SetLabel(-tpcLabel);
e43c066c 3160 else
b9671574 3161 track->SetLabel(tpcLabel);
e43c066c 3162 }
3163
3164}
3165
3166
3167
15dd636f 3168void AliITStrackerMI::CookdEdx(AliITStrackMI* track)
e43c066c 3169{
3170 //
3171 //
3172 // Int_t list[6];
00a7cc50 3173 //AliITSRecPoint * clist[6];
e43c066c 3174 // Int_t shared = GetNumberOfSharedClusters(track,index,list,clist);
3175 Float_t dedx[4];
3176 Int_t accepted=0;
b9671574 3177 track->SetChi2MIP(9,0);
e43c066c 3178 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3179 Int_t cindex = track->GetClusterIndex(i);
3180 Int_t l=(cindex & 0xf0000000) >> 28;
00a7cc50 3181 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
b9671574 3182 Int_t lab = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
e43c066c 3183 Int_t isWrong=1;
3184 for (Int_t ind=0;ind<3;ind++){
3185 if (cl->GetLabel(ind)==lab) isWrong=0;
3186 }
b9671574 3187 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
e43c066c 3188 if (l<2) continue;
3189 //if (l>3 && (cl->GetNy()>4) || (cl->GetNz()>4)) continue; //shared track
3190 //if (l>3&& !(cl->GetType()==1||cl->GetType()==10)) continue;
3191 //if (l<4&& !(cl->GetType()==1)) continue;
b9671574 3192 dedx[accepted]= track->GetSampledEdx(i);
e43c066c 3193 //dedx[accepted]= track->fNormQ[l];
3194 accepted++;
3195 }
3196 if (accepted<1) {
3197 track->SetdEdx(0);
3198 return;
3199 }
3200 Int_t indexes[4];
3201 TMath::Sort(accepted,dedx,indexes,kFALSE);
3202 Double_t low=0.;
3203 Double_t up=0.51;
3204 Double_t nl=low*accepted, nu =up*accepted;
3205 Float_t sumamp = 0;
3206 Float_t sumweight =0;
3207 for (Int_t i=0; i<accepted; i++) {
3208 Float_t weight =1;
3209 if (i<nl+0.1) weight = TMath::Max(1.-(nl-i),0.);
3210 if (i>nu-1) weight = TMath::Max(nu-i,0.);
3211 sumamp+= dedx[indexes[i]]*weight;
3212 sumweight+=weight;
3213 }
3214 track->SetdEdx(sumamp/sumweight);
3215}
3216
3217
3218void AliITStrackerMI::MakeCoeficients(Int_t ntracks){
3219 //
3220 //
628e7bb0 3221 if (fCoeficients) delete []fCoeficients;
e43c066c 3222 fCoeficients = new Float_t[ntracks*48];
3223 for (Int_t i=0;i<ntracks*48;i++) fCoeficients[i]=-1.;
3224}
3225
3226
00a7cc50 3227Double_t AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer)
e43c066c 3228{
3229 //
3230 //
3231 //
3232 Float_t erry,errz;
3233 Float_t theta = track->GetTgl();
3234 Float_t phi = track->GetSnp();
3235 phi = TMath::Sqrt(phi*phi/(1.-phi*phi));
b9671574 3236 GetError(layer,cluster,theta,phi,track->GetExpQ(),erry,errz);
e43c066c 3237 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz);
3238 Float_t ny,nz;
3239 GetNTeor(layer,cluster, theta,phi,ny,nz);
3240 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
3241 if (delta>1){
3242 chi2+=0.5*TMath::Min(delta/2,2.);
3243 chi2+=2.*cluster->GetDeltaProbability();
3244 }
3245 //
b9671574 3246 track->SetNy(layer,ny);
3247 track->SetNz(layer,nz);
3248 track->SetSigmaY(layer,erry);
3249 track->SetSigmaZ(layer, errz);
e43c066c 3250 //track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt(1+theta*theta+phi*phi);
b9671574 3251 track->SetNormQ(layer,cluster->GetQ()/TMath::Sqrt((1.+ track->GetTgl()*track->GetTgl())/(1.- track->GetSnp()*track->GetSnp())));
e43c066c 3252 return chi2;
3253
3254}
3255
00a7cc50 3256Int_t AliITStrackerMI::UpdateMI(AliITStrackMI* track, const AliITSRecPoint* cl,Double_t chi2,Int_t index) const
e43c066c 3257{
3258 //
3259 //
3260 //
3261 Int_t layer = (index & 0xf0000000) >> 28;
b9671574 3262 track->SetClIndex(layer, index);
3263 if ( (layer>1) &&track->GetNormQ(layer)/track->GetExpQ()<0.5 ) {
3264 chi2+= (0.5-track->GetNormQ(layer)/track->GetExpQ())*10.;
3265 track->SetdEdxMismatch(track->GetdEdxMismatch()+(0.5-track->GetNormQ(layer)/track->GetExpQ())*10.);
e43c066c 3266 }
a504d56f 3267
1f3e997f 3268 if (cl->GetQ()<=0) return 0; // ingore the "virtual" clusters
a504d56f 3269
1f3e997f 3270 // Take into account the mis-alignment
3271 Double_t x=track->GetX()+cl->GetX();
3272 if (!track->PropagateTo(x,0.,0.)) return 0;
3273
b9671574 3274 return track->UpdateMI(cl->GetY(),cl->GetZ(),track->GetSigmaY(layer),track->GetSigmaZ(layer),chi2,index);
e43c066c 3275}
3276
00a7cc50 3277void AliITStrackerMI::GetNTeor(Int_t layer, const AliITSRecPoint* /*cl*/, Float_t theta, Float_t phi, Float_t &ny, Float_t &nz)
e43c066c 3278{
3279 //
3280 //get "mean shape"
3281 //
3282 if (layer==0){
3283 ny = 1.+TMath::Abs(phi)*3.2;
3284 nz = 1.+TMath::Abs(theta)*0.34;
3285 return;
3286 }
3287 if (layer==1){
3288 ny = 1.+TMath::Abs(phi)*3.2;
3289 nz = 1.+TMath::Abs(theta)*0.28;
3290 return;
3291 }
3292
3293 if (layer>3){
3294 ny = 2.02+TMath::Abs(phi)*1.95;
3295 nz = 2.02+TMath::Abs(phi)*2.35;
3296 return;
3297 }
4c53440c 3298 ny = 6.6-2.7*TMath::Abs(phi);
e43c066c 3299 nz = 2.8-3.11*TMath::Abs(phi)+0.45*TMath::Abs(theta);
3300}
3301
3302
3303
00a7cc50 3304Int_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 3305{
3306 //calculate cluster position error
3307 //
3308 Float_t nz,ny;
3309 GetNTeor(layer, cl,theta,phi,ny,nz);
3310 erry = TMath::Sqrt(cl->GetSigmaY2());
3311 errz = TMath::Sqrt(cl->GetSigmaZ2());
3312 //
3313 // PIXELS
3314 if (layer<2){
3315
3316 if (TMath::Abs(ny-cl->GetNy())>0.6) {
3317 if (ny<cl->GetNy()){
3318 erry*=0.4+TMath::Abs(ny-cl->GetNy());
3319 errz*=0.4+TMath::Abs(ny-cl->GetNy());
3320 }else{
3321 erry*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
3322 errz*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
3323 }
3324 }
3325 if (TMath::Abs(nz-cl->GetNz())>1.) {
3326 erry*=TMath::Abs(nz-cl->GetNz());
3327 errz*=TMath::Abs(nz-cl->GetNz());
3328 }
3329 erry*=0.85;
3330 errz*=0.85;
3331 erry= TMath::Min(erry,float(0.005));
3332 errz= TMath::Min(errz,float(0.03));
3333 return 10;
3334 }
3335
3336//STRIPS
3337 if (layer>3){
1d4090b7 3338 //factor 1.8 appears in new simulation
3339 //
3340 Float_t scale=1.8;
e43c066c 3341 if (cl->GetNy()==100||cl->GetNz()==100){
1d4090b7 3342 erry = 0.004*scale;
3343 errz = 0.2*scale;
e43c066c 3344 return 100;
3345 }
3346 if (cl->GetNy()+cl->GetNz()>12){
1d4090b7 3347 erry = 0.06*scale;
3348 errz = 0.57*scale;
e43c066c 3349 return 100;
3350 }
3351 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
3352 Float_t chargematch = TMath::Max(double(normq/expQ),2.);
3353 //
3354 if (cl->GetType()==1 || cl->GetType()==10 ){
3355 if (chargematch<1.0 || (cl->GetNy()+cl->GetNz()<nz+ny+0.5)){
1d4090b7 3356 errz = 0.043*scale;
3357 erry = 0.00094*scale;
e43c066c 3358 return 101;
3359 }
3360 if (cl->GetNy()+cl->GetNz()<nz+ny+1.2){
1d4090b7 3361 errz = 0.06*scale;
3362 erry =0.0013*scale;
e43c066c 3363 return 102;
3364 }
1d4090b7 3365 erry = 0.0027*scale;
3366 errz = TMath::Min(0.028*(chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.15)*scale;
e43c066c 3367 return 103;
3368 }
3369 if (cl->GetType()==2 || cl->GetType()==11 ){
1d4090b7 3370 erry = TMath::Min(0.0010*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.05)*scale;
3371 errz = TMath::Min(0.025*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.5)*scale;
e43c066c 3372 return 104;
3373 }
3374
3375 if (cl->GetType()>100 ){
3376 if ((chargematch+cl->GetNy()+cl->GetNz()-nz-ny<1.5)){
1d4090b7 3377 errz = 0.05*scale;
3378 erry = 0.00096*scale;
e43c066c 3379 return 105;
3380 }
3381 if (cl->GetNy()+cl->GetNz()-nz-ny<1){
1d4090b7 3382 errz = 0.10*scale;
3383 erry = 0.0025*scale;
e43c066c 3384 return 106;
3385 }
3386
1d4090b7 3387 errz = TMath::Min(0.05*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.4)*scale;
3388 erry = TMath::Min(0.003*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.05)*scale;
e43c066c 3389 return 107;
3390 }
3391 Float_t diff = cl->GetNy()+cl->GetNz()-ny-nz;
3392 if (diff<1) diff=1;
3393 if (diff>4) diff=4;
3394
3395 if (cl->GetType()==5||cl->GetType()==6||cl->GetType()==7||cl->GetType()==8){
3396 errz = 0.14*diff;
3397 erry = 0.003*diff;
3398 return 108;
3399 }
3400 erry = 0.04*diff;
3401 errz = 0.06*diff;
3402 return 109;
3403 }
3404 //DRIFTS
3405 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
3406 Float_t chargematch = normq/expQ;
3407 Float_t factorz=1;
3408 Int_t cnz = cl->GetNz()%10;
3409 //charge match
3410 if (cl->GetType()==1){
3411 if (chargematch<1.25){
3412 erry = 0.0028*(1.+6./cl->GetQ()); // gold clusters
3413 }
3414 else{
3415 erry = 0.003*chargematch;
3416 if (cl->GetNz()==3) erry*=1.5;
3417 }
3418 if (chargematch<1.0){
3419 errz = 0.0011*(1.+6./cl->GetQ());
3420 }
3421 else{
3422 errz = 0.002*(1+2*(chargematch-1.));
3423 }
3424 if (cnz>nz+0.6) {
3425 erry*=(cnz-nz+0.5);
3426 errz*=1.4*(cnz-nz+0.5);
3427 }
3428 }
3429 if (cl->GetType()>1){
3430 if (chargematch<1){
3431 erry = 0.00385*(1.+6./cl->GetQ()); // gold clusters
3432 errz = 0.0016*(1.+6./cl->GetQ());
3433 }
3434 else{
3435 errz = 0.0014*(1+3*(chargematch-1.));
3436 erry = 0.003*(1+3*(chargematch-1.));
3437 }
3438 if (cnz>nz+0.6) {
3439 erry*=(cnz-nz+0.5);
3440 errz*=1.4*(cnz-nz+0.5);
3441 }
3442 }
3443
3444 if (TMath::Abs(cl->GetY())>2.5){
3445 factorz*=1+2*(TMath::Abs(cl->GetY())-2.5);
3446 }
3447 if (TMath::Abs(cl->GetY())<1){
3448 factorz*=1.+0.5*TMath::Abs(TMath::Abs(cl->GetY())-1.);
3449 }
3450 factorz= TMath::Min(factorz,float(4.));
3451 errz*=factorz;
3452
3453 erry= TMath::Min(erry,float(0.05));
3454 errz= TMath::Min(errz,float(0.05));
3455 return 200;
3456}
3457
3458
3459
628e7bb0 3460void AliITStrackerMI::GetDCASigma(AliITStrackMI* track, Float_t & sigmarfi, Float_t &sigmaz)
3461{
3462 //
3463 //DCA sigmas parameterization
3464 //to be paramterized using external parameters in future
3465 //
3466 //
6c94f330 3467 sigmarfi = 0.004+1.4 *TMath::Abs(track->GetC())+332.*track->GetC()*track->GetC();
3468 sigmaz = 0.011+4.37*TMath::Abs(track->GetC());
628e7bb0 3469}
3470
3471
e43c066c 3472void AliITStrackerMI::SignDeltas( TObjArray *ClusterArray, Float_t vz)
3473{
3474 //
3475 //
3476 Int_t entries = ClusterArray->GetEntriesFast();
3477 if (entries<4) return;
00a7cc50 3478 AliITSRecPoint* cluster = (AliITSRecPoint*)ClusterArray->At(0);
e43c066c 3479 Int_t layer = cluster->GetLayer();
3480 if (layer>1) return;
3481 Int_t index[10000];
3482 Int_t ncandidates=0;
3483 Float_t r = (layer>0)? 7:4;
3484 //
3485 for (Int_t i=0;i<entries;i++){
00a7cc50 3486 AliITSRecPoint* cl0 = (AliITSRecPoint*)ClusterArray->At(i);
e43c066c 3487 Float_t nz = 1+TMath::Abs((cl0->GetZ()-vz)/r);
3488 if (cl0->GetNy()+cl0->GetNz()<=5+2*layer+nz) continue;
3489 index[ncandidates] = i; //candidate to belong to delta electron track
3490 ncandidates++;
3491 if (cl0->GetNy()+cl0->GetNz()>9+2*layer+nz) {
3492 cl0->SetDeltaProbability(1);
3493 }
3494 }
3495 //
3496 //
3497 //
3498 for (Int_t i=0;i<ncandidates;i++){
00a7cc50 3499 AliITSRecPoint* cl0 = (AliITSRecPoint*)ClusterArray->At(index[i]);
e43c066c 3500 if (cl0->GetDeltaProbability()>0.8) continue;
3501 //
3502 Int_t ncl = 0;
3503 Float_t y[100],z[100],sumy,sumz,sumy2, sumyz, sumw;
3504 sumy=sumz=sumy2=sumyz=sumw=0.0;
3505 for (Int_t j=0;j<ncandidates;j++){
3506 if (i==j) continue;
00a7cc50 3507 AliITSRecPoint* cl1 = (AliITSRecPoint*)ClusterArray->At(index[j]);
e43c066c 3508 //
3509 Float_t dz = cl0->GetZ()-cl1->GetZ();
3510 Float_t dy = cl0->GetY()-cl1->GetY();
3511 if (TMath::Sqrt(dz*dz+dy*dy)<0.2){
3512 Float_t weight = cl1->GetNy()+cl1->GetNz()-2;
3513 y[ncl] = cl1->GetY();
3514 z[ncl] = cl1->GetZ();
3515 sumy+= y[ncl]*weight;
3516 sumz+= z[ncl]*weight;
3517 sumy2+=y[ncl]*y[ncl]*weight;
3518 sumyz+=y[ncl]*z[ncl]*weight;
3519 sumw+=weight;
3520 ncl++;
3521 }
3522 }
3523 if (ncl<4) continue;
3524 Float_t det = sumw*sumy2 - sumy*sumy;
3525 Float_t delta=1000;
3526 if (TMath::Abs(det)>0.01){
3527 Float_t z0 = (sumy2*sumz - sumy*sumyz)/det;
3528 Float_t k = (sumyz*sumw - sumy*sumz)/det;
3529 delta = TMath::Abs(cl0->GetZ()-(z0+k*cl0->GetY()));
3530 }
3531 else{
3532 Float_t z0 = sumyz/sumy;
3533 delta = TMath::Abs(cl0->GetZ()-z0);
3534 }
3535 if ( delta<0.05) {
3536 cl0->SetDeltaProbability(1-20.*delta);
3537 }
3538 }
3539}
3540
3541
15dd636f 3542void AliITStrackerMI::UpdateESDtrack(AliITStrackMI* track, ULong_t flags) const
e43c066c 3543{
3544 //
3545 //
3546 track->UpdateESDtrack(flags);
b9671574 3547 AliITStrackMI * oldtrack = (AliITStrackMI*)(track->GetESDtrack()->GetITStrack());
99c2ee26 3548 if (oldtrack) delete oldtrack;
b9671574 3549 track->GetESDtrack()->SetITStrack(new AliITStrackMI(*track));
3550 if (TMath::Abs(track->GetDnorm(1))<0.000000001){
628e7bb0 3551 printf("Problem\n");
3552 }
e43c066c 3553}
3554
3555
3556
81e97e0d 3557Int_t AliITStrackerMI::GetNearestLayer(const Double_t *xr) const{
3558 //
3559 //Get nearest upper layer close to the point xr.
3560 // rough approximation
3561 //
bf6adc12 3562 const Float_t kRadiuses[6]={4,6.5,15.03,24.,38.5,43.7};
81e97e0d 3563 Float_t radius = TMath::Sqrt(xr[0]*xr[0]+xr[1]*xr[1]);
3564 Int_t res =6;
3565 for (Int_t i=0;i<6;i++){
bf6adc12 3566 if (radius<kRadiuses[i]){
81e97e0d 3567 res =i;
3568 break;
3569 }
3570 }
3571 return res;
3572}
e43c066c 3573
51ad6848 3574
81e97e0d 3575void AliITStrackerMI::UpdateTPCV0(AliESD *event){
3576 //
3577 //try to update, or reject TPC V0s
3578 //
d6a49f20 3579 Int_t nv0s = event->GetNumberOfV0s();
81e97e0d 3580 Int_t nitstracks = fTrackHypothesys.GetEntriesFast();
51ad6848 3581
81e97e0d 3582 for (Int_t i=0;i<nv0s;i++){
d6a49f20 3583 AliESDv0 * vertex = event->GetV0(i);
81e97e0d 3584 Int_t ip = vertex->GetIndex(0);
3585 Int_t im = vertex->GetIndex(1);
3586 //
3587 TObjArray * arrayp = (ip<nitstracks) ? (TObjArray*)fTrackHypothesys.At(ip):0;
3588 TObjArray * arraym = (im<nitstracks) ? (TObjArray*)fTrackHypothesys.At(im):0;
3589 AliITStrackMI * trackp = (arrayp!=0) ? (AliITStrackMI*)arrayp->At(0):0;
3590 AliITStrackMI * trackm = (arraym!=0) ? (AliITStrackMI*)arraym->At(0):0;
3591 //
3592 //
3593 if (trackp){
b9671574 3594 if (trackp->GetNumberOfClusters()+trackp->GetNDeadZone()>5.5){
3595 if (trackp->GetConstrain()&&trackp->GetChi2MIP(0)<3) vertex->SetStatus(-100);
3596 if (!trackp->GetConstrain()&&trackp->GetChi2MIP(0)<2) vertex->SetStatus(-100);
81e97e0d 3597 }
3598 }
51ad6848 3599
81e97e0d 3600 if (trackm){
b9671574 3601 if (trackm->GetNumberOfClusters()+trackm->GetNDeadZone()>5.5){
3602 if (trackm->GetConstrain()&&trackm->GetChi2MIP(0)<3) vertex->SetStatus(-100);
3603 if (!trackm->GetConstrain()&&trackm->GetChi2MIP(0)<2) vertex->SetStatus(-100);
81e97e0d 3604 }
3605 }
3606 if (vertex->GetStatus()==-100) continue;
3607 //
b75d63a7 3608 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
3609 Int_t clayer = GetNearestLayer(xrp); //I.B.
81e97e0d 3610 vertex->SetNBefore(clayer); //
3611 vertex->SetChi2Before(9*clayer); //
3612 vertex->SetNAfter(6-clayer); //
3613 vertex->SetChi2After(0); //
3614 //
3615 if (clayer >1 ){ // calculate chi2 before vertex
3616 Float_t chi2p = 0, chi2m=0;
3617 //
3618 if (trackp){
3619 for (Int_t ilayer=0;ilayer<clayer;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 = 9*clayer;
3630 }
3631 //
3632 if (trackm){
3633 for (Int_t ilayer=0;ilayer<clayer;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 = 9*clayer;
3644 }
3645 vertex->SetChi2Before(TMath::Min(chi2p,chi2m));
3646 if (TMath::Min(chi2p,chi2m)/Float_t(clayer)<4) vertex->SetStatus(-10); // track exist before vertex
3647 }
3648
3649 if (clayer < 5 ){ // calculate chi2 after vertex
3650 Float_t chi2p = 0, chi2m=0;
3651 //
6c94f330 3652 if (trackp&&TMath::Abs(trackp->GetTgl())<1.){
81e97e0d 3653 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
b9671574 3654 if (trackp->GetClIndex(ilayer)>0){
3655 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+
3656 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));
81e97e0d 3657 }
3658 else{
3659 chi2p+=9;
3660 }
3661 }
3662 }else{
3663 chi2p = 0;
3664 }
3665 //
6c94f330 3666 if (trackm&&TMath::Abs(trackm->GetTgl())<1.){
81e97e0d 3667 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
b9671574 3668 if (trackm->GetClIndex(ilayer)>0){
3669 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+
3670 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));
81e97e0d 3671 }
3672 else{
3673 chi2m+=9;
3674 }
3675 }
3676 }else{
3677 chi2m = 0;
3678 }
3679 vertex->SetChi2After(TMath::Max(chi2p,chi2m));
3680 if (TMath::Max(chi2m,chi2p)/Float_t(6-clayer)>9) vertex->SetStatus(-20); // track not found in ITS
3681 }
3682 }
3683 //
3684}
51ad6848 3685
67c1e979 3686
3687
81e97e0d 3688void AliITStrackerMI::FindV02(AliESD *event)
e43c066c 3689{
3690 //
81e97e0d 3691 // V0 finder
3692 //
3693 // Cuts on DCA - R dependent
3694 // max distance DCA between 2 tracks cut
3695 // maxDist = TMath::Min(kMaxDist,kMaxDist0+pvertex->GetRr()*kMaxDist);
3696 //
3697 const Float_t kMaxDist0 = 0.1;
3698 const Float_t kMaxDist1 = 0.1;
3699 const Float_t kMaxDist = 1;
3700 const Float_t kMinPointAngle = 0.85;
3701 const Float_t kMinPointAngle2 = 0.99;
3702 const Float_t kMinR = 0.5;
3703 const Float_t kMaxR = 220;
3704 //const Float_t kCausality0Cut = 0.19;
3705 //const Float_t kLikelihood01Cut = 0.25;
3706 //const Float_t kPointAngleCut = 0.9996;
3707 const Float_t kCausality0Cut = 0.19;
3708 const Float_t kLikelihood01Cut = 0.45;
3709 const Float_t kLikelihood1Cut = 0.5;
3710 const Float_t kCombinedCut = 0.55;
3711
3712 //
3713 //
3714 TTreeSRedirector &cstream = *fDebugStreamer;
3715 Int_t ntracks = event->GetNumberOfTracks();
3716 Int_t nitstracks = fTrackHypothesys.GetEntriesFast();
3717 fOriginal.Expand(ntracks);
3718 fTrackHypothesys.Expand(ntracks);
3719 fBestHypothesys.Expand(ntracks);
3720 //
3721 AliHelix * helixes = new AliHelix[ntracks+2];
3722 TObjArray trackarray(ntracks+2); //array with tracks - with vertex constrain
3723 TObjArray trackarrayc(ntracks+2); //array of "best tracks" - without vertex constrain
3724 TObjArray trackarrayl(ntracks+2); //array of "longest tracks" - without vertex constrain
3725 Bool_t * forbidden = new Bool_t [ntracks+2];
3726 Int_t *itsmap = new Int_t [ntracks+2];
3727 Float_t *dist = new Float_t[ntracks+2];
3728 Float_t *normdist0 = new Float_t[ntracks+2];
3729 Float_t *normdist1 = new Float_t[ntracks+2];
3730 Float_t *normdist = new Float_t[ntracks+2];
3731 Float_t *norm = new Float_t[ntracks+2];
3732 Float_t *maxr = new Float_t[ntracks+2];
3733 Float_t *minr = new Float_t[ntracks+2];
3734 Float_t *minPointAngle= new Float_t[ntracks+2];
3735 //
6c94f330 3736 AliV0 *pvertex = new AliV0;
81e97e0d 3737 AliITStrackMI * dummy= new AliITStrackMI;
3738 dummy->SetLabel(0);
3739 AliITStrackMI trackat0; //temporary track for DCA calculation
e43c066c 3740 //
81e97e0d 3741 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
628e7bb0 3742 //
81e97e0d 3743 // make its - esd map
e43c066c 3744 //
81e97e0d 3745 for (Int_t itrack=0;itrack<ntracks+2;itrack++) {
3746 itsmap[itrack] = -1;
3747 forbidden[itrack] = kFALSE;
3748 maxr[itrack] = kMaxR;
3749 minr[itrack] = kMinR;
3750 minPointAngle[itrack] = kMinPointAngle;
3751 }
3752 for (Int_t itrack=0;itrack<nitstracks;itrack++){
3753 AliITStrackMI * original = (AliITStrackMI*)(fOriginal.At(itrack));
b9671574 3754 Int_t esdindex = original->GetESDtrack()->GetID();
81e97e0d 3755 itsmap[esdindex] = itrack;
3756 }
3757 //
3758 // create its tracks from esd tracks if not done before
3759 //
3760 for (Int_t itrack=0;itrack<ntracks;itrack++){
3761 if (itsmap[itrack]>=0) continue;
3762 AliITStrackMI * tpctrack = new AliITStrackMI(*(event->GetTrack(itrack)));
791f9a2a 3763 //tpctrack->fD[0] = tpctrack->GetD(GetX(),GetY());
3764 //tpctrack->fD[1] = tpctrack->GetZat(GetX())-GetZ();
b9671574 3765 tpctrack->GetDZ(GetX(),GetY(),GetZ(),tpctrack->GetDP()); //I.B.
3766 if (tpctrack->GetD(0)<20 && tpctrack->GetD(1)<20){
81e97e0d 3767 // tracks which can reach inner part of ITS
3768 // propagate track to outer its volume - with correction for material
3769 CorrectForDeadZoneMaterial(tpctrack);
3770 }
3771 itsmap[itrack] = nitstracks;
3772 fOriginal.AddAt(tpctrack,nitstracks);
3773 nitstracks++;
3774 }
3775 //
3776 // fill temporary arrays
3777 //
3778 for (Int_t itrack=0;itrack<ntracks;itrack++){
3779 AliESDtrack * esdtrack = event->GetTrack(itrack);
3780 Int_t itsindex = itsmap[itrack];
3781 AliITStrackMI *original = (AliITStrackMI*)fOriginal.At(itsmap[itrack]);
3782 if (!original) continue;
3783 AliITStrackMI *bestConst = 0;
3784 AliITStrackMI *bestLong = 0;
3785 AliITStrackMI *best = 0;
3786 //
628e7bb0 3787 //
81e97e0d 3788 TObjArray * array = (TObjArray*) fTrackHypothesys.At(itsindex);
3789 Int_t hentries = (array==0) ? 0 : array->GetEntriesFast();
3790 // Get best track with vertex constrain
628e7bb0 3791 for (Int_t ih=0;ih<hentries;ih++){
3792 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
b9671574 3793 if (!trackh->GetConstrain()) continue;
81e97e0d 3794 if (!bestConst) bestConst = trackh;
b9671574 3795 if (trackh->GetNumberOfClusters()>5.0){
81e97e0d 3796 bestConst = trackh; // full track - with minimal chi2
3797 break;
3798 }
b9671574 3799 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()) continue;
81e97e0d 3800 bestConst = trackh;
628e7bb0 3801 break;
81e97e0d 3802 }
3803 // Get best long track without vertex constrain and best track without vertex constrain
628e7bb0 3804 for (Int_t ih=0;ih<hentries;ih++){
3805 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
b9671574 3806 if (trackh->GetConstrain()) continue;
81e97e0d 3807 if (!best) best = trackh;
3808 if (!bestLong) bestLong = trackh;
b9671574 3809 if (trackh->GetNumberOfClusters()>5.0){
81e97e0d 3810 bestLong = trackh; // full track - with minimal chi2
3811 break;
3812 }
b9671574 3813 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()) continue;
81e97e0d 3814 bestLong = trackh;
628e7bb0 3815 }
81e97e0d 3816 if (!best) {
3817 best = original;
3818 bestLong = original;
628e7bb0 3819 }
6c94f330 3820 //I.B. trackat0 = *bestLong;
420c3064 3821 new (&trackat0) AliITStrackMI(*bestLong);
81e97e0d 3822 Double_t xx,yy,zz,alpha;
3823 bestLong->GetGlobalXYZat(bestLong->GetX(),xx,yy,zz);
3824 alpha = TMath::ATan2(yy,xx);
3825 trackat0.Propagate(alpha,0);
3826 // calculate normalized distances to the vertex
628e7bb0 3827 //
6c94f330 3828 Float_t ptfac = (1.+100.*TMath::Abs(trackat0.GetC()));
b9671574 3829 if ( bestLong->GetNumberOfClusters()>3 ){
6c94f330 3830 dist[itsindex] = trackat0.GetY();
3831 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
3832 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
3833 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
81e97e0d 3834 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
29641977 3835 if (!bestConst){
b9671574 3836 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<6) normdist[itsindex]*=2.;
3837 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<5) normdist[itsindex]*=2.;
3838 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<4) normdist[itsindex]*=2.;
29641977 3839 }else{
b9671574 3840 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<6) normdist[itsindex]*=1.5;
3841 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<5) normdist[itsindex]*=1.5;
29641977 3842 }
81e97e0d 3843 }
3844 else{
b9671574 3845 if (bestConst&&bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5){
3846 dist[itsindex] = bestConst->GetD(0);
3847 norm[itsindex] = bestConst->GetDnorm(0);
3848 normdist0[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
3849 normdist1[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
81e97e0d 3850 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
3851 }else{
6c94f330 3852 dist[itsindex] = trackat0.GetY();
3853 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
3854 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
3855 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
81e97e0d 3856 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
6c94f330 3857 if (TMath::Abs(trackat0.GetTgl())>1.05){
67c1e979 3858 if (normdist[itsindex]<3) forbidden[itsindex]=kTRUE;
3859 if (normdist[itsindex]>3) {
3860 minr[itsindex] = TMath::Max(Float_t(40.),minr[itsindex]);
3861 }
81e97e0d 3862 }
3863 }
3864 }
628e7bb0 3865 //
81e97e0d 3866 //-----------------------------------------------------------
3867 //Forbid primary track candidates -
628e7bb0 3868 //
81e97e0d 3869 //treetr->SetAlias("forbidden0","Tr0.fN<4&&Tr1.fN+Tr1.fNDeadZone>4.5");
3870 //treetr->SetAlias("forbidden1","ND<3&&Tr1.fN+Tr1.fNDeadZone>5.5");
3871 //treetr->SetAlias("forbidden2","ND<2&&Tr1.fClIndex[0]>0&&Tr1.fClIndex[0]>0");
3872 //treetr->SetAlias("forbidden3","ND<1&&Tr1.fClIndex[0]>0");
3873 //treetr->SetAlias("forbidden4","ND<4&&Tr1.fNormChi2[0]<2");
3874 //treetr->SetAlias("forbidden5","ND<5&&Tr1.fNormChi2[0]<1");
3875 //-----------------------------------------------------------
3876 if (bestConst){
b9671574 3877 if (bestLong->GetNumberOfClusters()<4 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5) forbidden[itsindex]=kTRUE;
3878 if (normdist[itsindex]<3 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>5.5) forbidden[itsindex]=kTRUE;
3879 if (normdist[itsindex]<2 && bestConst->GetClIndex(0)>0 && bestConst->GetClIndex(1)>0 ) forbidden[itsindex]=kTRUE;
3880 if (normdist[itsindex]<1 && bestConst->GetClIndex(0)>0) forbidden[itsindex]=kTRUE;
3881 if (normdist[itsindex]<4 && bestConst->GetNormChi2(0)<2) forbidden[itsindex]=kTRUE;
3882 if (normdist[itsindex]<5 && bestConst->GetNormChi2(0)<1) forbidden[itsindex]=kTRUE;
3883 if (bestConst->GetNormChi2(0)<2.5) {
81e97e0d 3884 minPointAngle[itsindex]= 0.9999;
3885 maxr[itsindex] = 10;
628e7bb0 3886 }
e43c066c 3887 }
81e97e0d 3888 //
3889 //forbid daughter kink candidates
3890 //
3891 if (esdtrack->GetKinkIndex(0)>0) forbidden[itsindex] = kTRUE;
3892 Bool_t isElectron = kTRUE;
29641977 3893 Bool_t isProton = kTRUE;
81e97e0d 3894 Double_t pid[5];
3895 esdtrack->GetESDpid(pid);
3896 for (Int_t i=1;i<5;i++){
3897 if (pid[0]<pid[i]) isElectron= kFALSE;
29641977 3898 if (pid[4]<pid[i]) isProton= kFALSE;
81e97e0d 3899 }
3900 if (isElectron){
3901 forbidden[itsindex]=kFALSE;
29641977 3902 normdist[itsindex]*=-1;
3903 }
3904 if (isProton){
3905 if (normdist[itsindex]>2) forbidden[itsindex]=kFALSE;
3906 normdist[itsindex]*=-1;
81e97e0d 3907 }
29641977 3908
81e97e0d 3909 //
3910 // Causality cuts in TPC volume
3911 //
3912 if (esdtrack->GetTPCdensity(0,10) >0.6) maxr[itsindex] = TMath::Min(Float_t(110),maxr[itsindex]);
3913 if (esdtrack->GetTPCdensity(10,30)>0.6) maxr[itsindex] = TMath::Min(Float_t(120),maxr[itsindex]);
3914 if (esdtrack->GetTPCdensity(20,40)>0.6) maxr[itsindex] = TMath::Min(Float_t(130),maxr[itsindex]);
3915 if (esdtrack->GetTPCdensity(30,50)>0.6) maxr[itsindex] = TMath::Min(Float_t(140),maxr[itsindex]);
3916 //
b9671574 3917 if (esdtrack->GetTPCdensity(0,60)<0.4&&bestLong->GetNumberOfClusters()<3) minr[itsindex]=100;
81e97e0d 3918 //
3919 //
29641977 3920 if (kFALSE){
81e97e0d 3921 cstream<<"Track"<<
3922 "Tr0.="<<best<<
3923 "Tr1.="<<((bestConst)? bestConst:dummy)<<
3924 "Tr2.="<<bestLong<<
3925 "Tr3.="<<&trackat0<<
3926 "Esd.="<<esdtrack<<
3927 "Dist="<<dist[itsindex]<<
3928 "ND0="<<normdist0[itsindex]<<
3929 "ND1="<<normdist1[itsindex]<<
3930 "ND="<<normdist[itsindex]<<
3931 "Pz="<<primvertex[2]<<
3932 "Forbid="<<forbidden[itsindex]<<
3933 "\n";
3934 //
3935 }
3936 trackarray.AddAt(best,itsindex);
3937 trackarrayc.AddAt(bestConst,itsindex);
3938 trackarrayl.AddAt(bestLong,itsindex);
3939 new (&helixes[itsindex]) AliHelix(*best);
e43c066c 3940 }
628e7bb0 3941 //
3942 //
81e97e0d 3943 //
3944 // first iterration of V0 finder
3945 //
3946 for (Int_t iesd0=0;iesd0<ntracks;iesd0++){
3947 Int_t itrack0 = itsmap[iesd0];
3948 if (forbidden[itrack0]) continue;
3949 AliITStrackMI * btrack0 = (AliITStrackMI*)trackarray.At(itrack0);
3950 if (!btrack0) continue;
420c3064 3951 if (btrack0->GetSign()>0) continue;
628e7bb0 3952 AliITStrackMI *trackc0 = (AliITStrackMI*)trackarrayc.At(itrack0);
3953 //
81e97e0d 3954 for (Int_t iesd1=0;iesd1<ntracks;iesd1++){
3955 Int_t itrack1 = itsmap[iesd1];
3956 if (forbidden[itrack1]) continue;
3957
3958 AliITStrackMI * btrack1 = (AliITStrackMI*)trackarray.At(itrack1);
3959 if (!btrack1) continue;
420c3064 3960 if (btrack1->GetSign()<0) continue;
81e97e0d 3961 Bool_t isGold = kFALSE;
3962 if (TMath::Abs(TMath::Abs(btrack0->GetLabel())-TMath::Abs(btrack1->GetLabel()))==1){
3963 isGold = kTRUE;
628e7bb0 3964 }
81e97e0d 3965 AliITStrackMI *trackc1 = (AliITStrackMI*)trackarrayc.At(itrack1);
3966 AliHelix &h1 = helixes[itrack0];
3967 AliHelix &h2 = helixes[itrack1];
628e7bb0 3968 //
81e97e0d 3969 // find linear distance
3970 Double_t rmin =0;
628e7bb0 3971 //
51ad6848 3972 //
51ad6848 3973 //
81e97e0d 3974 Double_t phase[2][2],radius[2];
3975 Int_t points = h1.GetRPHIintersections(h2, phase, radius);
3976 if (points==0) continue;
c49fe0bf 3977 Double_t delta[2]={1000000,1000000};
81e97e0d 3978 rmin = radius[0];
3979 h1.ParabolicDCA(h2,phase[0][0],phase[0][1],radius[0],delta[0]);
3980 if (points==2){
3981 if (radius[1]<rmin) rmin = radius[1];
3982 h1.ParabolicDCA(h2,phase[1][0],phase[1][1],radius[1],delta[1]);
3983 }
3984 rmin = TMath::Sqrt(rmin);
3985 Double_t distance = 0;
3986 Double_t radiusC = 0;
3987 Int_t iphase = 0;
c49fe0bf 3988 if (points==1 || delta[0]<delta[1]){
81e97e0d 3989 distance = TMath::Sqrt(delta[0]);
3990 radiusC = TMath::Sqrt(radius[0]);
3991 }else{
3992 distance = TMath::Sqrt(delta[1]);
3993 radiusC = TMath::Sqrt(radius[1]);
3994 iphase=1;
3995 }
3996 if (radiusC<TMath::Max(minr[itrack0],minr[itrack1])) continue;
3997 if (radiusC>TMath::Min(maxr[itrack0],maxr[itrack1])) continue;
3998 Float_t maxDist = TMath::Min(kMaxDist,Float_t(kMaxDist0+radiusC*kMaxDist1));
3999 if (distance>maxDist) continue;
4000 Float_t pointAngle = h1.GetPointAngle(h2,phase[iphase],primvertex);
4001 if (pointAngle<TMath::Max(minPointAngle[itrack0],minPointAngle[itrack1])) continue;
628e7bb0 4002 //
51ad6848 4003 //
81e97e0d 4004 // Double_t distance = TestV0(h1,h2,pvertex,rmin);
51ad6848 4005 //
81e97e0d 4006 // if (distance>maxDist) continue;
4007 // if (pvertex->GetRr()<kMinR) continue;
4008 // if (pvertex->GetRr()>kMaxR) continue;
4009 AliITStrackMI * track0=btrack0;
4010 AliITStrackMI * track1=btrack1;
4011 // if (pvertex->GetRr()<3.5){
4012 if (radiusC<3.5){
4013 //use longest tracks inside the pipe
4014 track0 = (AliITStrackMI*)trackarrayl.At(itrack0);
4015 track1 = (AliITStrackMI*)trackarrayl.At(itrack1);
4016 }
51ad6848 4017 //
4018 //
b75d63a7 4019 pvertex->SetParamN(*track0);
4020 pvertex->SetParamP(*track1);
81e97e0d 4021 pvertex->Update(primvertex);
b9671574 4022 pvertex->SetClusters(track0->ClIndex(),track1->ClIndex()); // register clusters
67c1e979 4023
81e97e0d 4024 if (pvertex->GetRr()<kMinR) continue;
4025 if (pvertex->GetRr()>kMaxR) continue;
b75d63a7 4026 if (pvertex->GetV0CosineOfPointingAngle()<kMinPointAngle) continue;
4027//Bo: if (pvertex->GetDist2()>maxDist) continue;
4028 if (pvertex->GetDcaV0Daughters()>maxDist) continue;
4029//Bo: pvertex->SetLab(0,track0->GetLabel());
4030//Bo: pvertex->SetLab(1,track1->GetLabel());
b9671574 4031 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
4032 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
81e97e0d 4033 //
4034 AliITStrackMI * htrackc0 = trackc0 ? trackc0:dummy;
4035 AliITStrackMI * htrackc1 = trackc1 ? trackc1:dummy;
51ad6848 4036
81e97e0d 4037 //
4038 //
4039 TObjArray * array0b = (TObjArray*)fBestHypothesys.At(itrack0);
6c94f330 4040 if (!array0b&&pvertex->GetRr()<40 && TMath::Abs(track0->GetTgl())<1.1)
81e97e0d 4041 FollowProlongationTree((AliITStrackMI*)fOriginal.At(itrack0),itrack0, kFALSE);
4042 TObjArray * array1b = (TObjArray*)fBestHypothesys.At(itrack1);
6c94f330 4043 if (!array1b&&pvertex->GetRr()<40 && TMath::Abs(track1->GetTgl())<1.1)
81e97e0d 4044 FollowProlongationTree((AliITStrackMI*)fOriginal.At(itrack1),itrack1, kFALSE);
4045 //
4046 AliITStrackMI * track0b = (AliITStrackMI*)fOriginal.At(itrack0);
4047 AliITStrackMI * track1b = (AliITStrackMI*)fOriginal.At(itrack1);
4048 AliITStrackMI * track0l = (AliITStrackMI*)fOriginal.At(itrack0);
4049 AliITStrackMI * track1l = (AliITStrackMI*)fOriginal.At(itrack1);
4050
4051 Float_t minchi2before0=16;
4052 Float_t minchi2before1=16;
4053 Float_t minchi2after0 =16;
4054 Float_t minchi2after1 =16;
b75d63a7 4055 Double_t xrp[3]; pvertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
4056 Int_t maxLayer = GetNearestLayer(xrp); //I.B.
81e97e0d 4057
4058 if (array0b) for (Int_t i=0;i<5;i++){
4059 // best track after vertex
4060 AliITStrackMI * btrack = (AliITStrackMI*)array0b->At(i);
4061 if (!btrack) continue;
b9671574 4062 if (btrack->GetNumberOfClusters()>track0l->GetNumberOfClusters()) track0l = btrack;
29641977 4063 // if (btrack->fX<pvertex->GetRr()-2.-0.5/(0.1+pvertex->GetAnglep()[2])) {
6c94f330 4064 if (btrack->GetX()<pvertex->GetRr()-2.) {
b9671574 4065 if ( (maxLayer>i+2|| (i==0)) && btrack->GetNumberOfClusters()==(6-i)&&i<3){
81e97e0d 4066 Float_t sumchi2= 0;
4067 Float_t sumn = 0;
29641977 4068 if (maxLayer<3){ // take prim vertex as additional measurement
4069 if (normdist[itrack0]>0 && htrackc0){
97f754fa 4070 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack0]*normdist[itrack0],16.);
29641977 4071 }else{
97f754fa 4072 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack0]*normdist[itrack0]+3.),16.);
29641977 4073 }
4074 sumn += 3-maxLayer;
4075 }
81e97e0d 4076 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
97f754fa 4077 sumn+=1.;
b9671574 4078 if (!btrack->GetClIndex(ilayer)){
81e97e0d 4079 sumchi2+=25;
4080 continue;
4081 }else{
b9671574 4082 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
97f754fa 4083 for (Int_t itrack=0;itrack<4;itrack++){
b9671574 4084 if (fgLayers[ilayer].GetClusterTracks(itrack,c)>=0 && fgLayers[ilayer].GetClusterTracks(itrack,c)!=itrack0){
97f754fa 4085 sumchi2+=18.; //shared cluster
4086 break;
4087 }
4088 }
b9671574 4089 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
4090 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
81e97e0d 4091 }
4092 }
4093 sumchi2/=sumn;
4094 if (sumchi2<minchi2before0) minchi2before0=sumchi2;
51ad6848 4095 }
81e97e0d 4096 continue; //safety space - Geo manager will give exact layer
51ad6848 4097 }
81e97e0d 4098 track0b = btrack;
b9671574 4099 minchi2after0 = btrack->GetNormChi2(i);
81e97e0d 4100 break;
4101 }
4102 if (array1b) for (Int_t i=0;i<5;i++){
4103 // best track after vertex
4104 AliITStrackMI * btrack = (AliITStrackMI*)array1b->At(i);
4105 if (!btrack) continue;
b9671574 4106 if (btrack->GetNumberOfClusters()>track1l->GetNumberOfClusters()) track1l = btrack;
29641977 4107 // if (btrack->fX<pvertex->GetRr()-2-0.5/(0.1+pvertex->GetAnglep()[2])){
6c94f330 4108 if (btrack->GetX()<pvertex->GetRr()-2){
b9671574 4109 if ((maxLayer>i+2 || (i==0))&&btrack->GetNumberOfClusters()==(6-i)&&(i<3)){
81e97e0d 4110 Float_t sumchi2= 0;
4111 Float_t sumn = 0;
29641977 4112 if (maxLayer<3){ // take prim vertex as additional measurement
4113 if (normdist[itrack1]>0 && htrackc1){
97f754fa 4114 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack1]*normdist[itrack1],16.);
29641977 4115 }else{
97f754fa 4116 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack1]*normdist[itrack1]+3.),16.);
29641977 4117 }
4118 sumn += 3-maxLayer;
4119 }
81e97e0d 4120 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
4121 sumn+=1.;
b9671574 4122 if (!btrack->GetClIndex(ilayer)){
81e97e0d 4123 sumchi2+=30;
4124 continue;
4125 }else{
b9671574 4126 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
97f754fa 4127 for (Int_t itrack=0;itrack<4;itrack++){
b9671574 4128 if (fgLayers[ilayer].GetClusterTracks(itrack,c)>=0 && fgLayers[ilayer].GetClusterTracks(itrack,c)!=itrack1){
97f754fa 4129 sumchi2+=18.; //shared cluster
4130 break;
4131 }
4132 }
b9671574 4133 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
4134 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
81e97e0d 4135 }
4136 }
4137 sumchi2/=sumn;
4138 if (sumchi2<minchi2before1) minchi2before1=sumchi2;
51ad6848 4139 }
81e97e0d 4140 continue; //safety space - Geo manager will give exact layer
51ad6848 4141 }
81e97e0d 4142 track1b = btrack;
b9671574 4143 minchi2after1 = btrack->GetNormChi2(i);
81e97e0d 4144 break;
e43c066c 4145 }
628e7bb0 4146 //
81e97e0d 4147 // position resolution - used for DCA cut
6c94f330 4148 Float_t sigmad = track0b->GetSigmaY2()+track0b->GetSigmaZ2()+track1b->GetSigmaY2()+track1b->GetSigmaZ2()+
4149 (track0b->GetX()-pvertex->GetRr())*(track0b->GetX()-pvertex->GetRr())*(track0b->GetSigmaSnp2()+track0b->GetSigmaTgl2())+
4150 (track1b->GetX()-pvertex->GetRr())*(track1b->GetX()-pvertex->GetRr())*(track1b->GetSigmaSnp2()+track1b->GetSigmaTgl2());
81e97e0d 4151 sigmad =TMath::Sqrt(sigmad)+0.04;
4152 if (pvertex->GetRr()>50){
4153 Double_t cov0[15],cov1[15];
b9671574 4154 track0b->GetESDtrack()->GetInnerExternalCovariance(cov0);
4155 track1b->GetESDtrack()->GetInnerExternalCovariance(cov1);
81e97e0d 4156 sigmad = cov0[0]+cov0[2]+cov1[0]+cov1[2]+
4157 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov0[5]+cov0[9])+
4158 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov1[5]+cov1[9]);
4159 sigmad =TMath::Sqrt(sigmad)+0.05;
4160 }
4161 //
6c94f330 4162 AliV0 vertex2;
b75d63a7 4163 vertex2.SetParamN(*track0b);
4164 vertex2.SetParamP(*track1b);
81e97e0d 4165 vertex2.Update(primvertex);
b75d63a7 4166 //Bo: if (vertex2.GetDist2()<=pvertex->GetDist2()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
4167 if (vertex2.GetDcaV0Daughters()<=pvertex->GetDcaV0Daughters()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
4168 pvertex->SetParamN(*track0b);
4169 pvertex->SetParamP(*track1b);
81e97e0d 4170 pvertex->Update(primvertex);
b9671574 4171 pvertex->SetClusters(track0b->ClIndex(),track1b->ClIndex()); // register clusters
4172 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
4173 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
81e97e0d 4174 }
4175 pvertex->SetDistSigma(sigmad);
b75d63a7 4176 //Bo: pvertex->SetDistNorm(pvertex->GetDist2()/sigmad);
29641977 4177 pvertex->SetNormDCAPrim(normdist[itrack0],normdist[itrack1]);
628e7bb0 4178 //
81e97e0d 4179 // define likelihhod and causalities
628e7bb0 4180 //
81e97e0d 4181 Float_t pa0=1, pa1=1, pb0=0.26, pb1=0.26;
29641977 4182 if (maxLayer<1){
4183 Float_t fnorm0 = normdist[itrack0];
4184 if (fnorm0<0) fnorm0*=-3;
4185 Float_t fnorm1 = normdist[itrack1];
4186 if (fnorm1<0) fnorm1*=-3;
4187 if (pvertex->GetAnglep()[2]>0.1 || (pvertex->GetRr()<10.5)&& pvertex->GetAnglep()[2]>0.05 || pvertex->GetRr()<3){
4188 pb0 = TMath::Exp(-TMath::Min(fnorm0,Float_t(16.))/12.);
4189 pb1 = TMath::Exp(-TMath::Min(fnorm1,Float_t(16.))/12.);
67c1e979 4190 }
81e97e0d 4191 pvertex->SetChi2Before(normdist[itrack0]);
4192 pvertex->SetChi2After(normdist[itrack1]);
4193 pvertex->SetNAfter(0);
4194 pvertex->SetNBefore(0);
4195 }else{
4196 pvertex->SetChi2Before(minchi2before0);
4197 pvertex->SetChi2After(minchi2before1);
29641977 4198 if (pvertex->GetAnglep()[2]>0.1 || ( pvertex->GetRr()<10.5 && pvertex->GetAnglep()[2]>0.05) || pvertex->GetRr()<3){
4199 pb0 = TMath::Exp(-TMath::Min(minchi2before0,Float_t(16))/12.);
4200 pb1 = TMath::Exp(-TMath::Min(minchi2before1,Float_t(16))/12.);
4201 }
4202 pvertex->SetNAfter(maxLayer);
4203 pvertex->SetNBefore(maxLayer);
628e7bb0 4204 }
81e97e0d 4205 if (pvertex->GetRr()<90){
b9671574 4206 pa0 *= TMath::Min(track0->GetESDtrack()->GetTPCdensity(0,60),Float_t(1.));
4207 pa1 *= TMath::Min(track1->GetESDtrack()->GetTPCdensity(0,60),Float_t(1.));
628e7bb0 4208 }
81e97e0d 4209 if (pvertex->GetRr()<20){
4210 pa0 *= (0.2+TMath::Exp(-TMath::Min(minchi2after0,Float_t(16))/8.))/1.2;
4211 pa1 *= (0.2+TMath::Exp(-TMath::Min(minchi2after1,Float_t(16))/8.))/1.2;
e43c066c 4212 }
628e7bb0 4213 //
81e97e0d 4214 pvertex->SetCausality(pb0,pb1,pa0,pa1);
628e7bb0 4215 //
81e97e0d 4216 // Likelihood calculations - apply cuts
4217 //
4218 Bool_t v0OK = kTRUE;
4219 Float_t p12 = pvertex->GetParamP()->GetParameter()[4]*pvertex->GetParamP()->GetParameter()[4];
b75d63a7 4220 p12 += pvertex->GetParamN()->GetParameter()[4]*pvertex->GetParamN()->GetParameter()[4];
81e97e0d 4221 p12 = TMath::Sqrt(p12); // "mean" momenta
4222 Float_t sigmap0 = 0.0001+0.001/(0.1+pvertex->GetRr());
4223 Float_t sigmap = 0.5*sigmap0*(0.6+0.4*p12); // "resolution: of point angle - as a function of radius and momenta
4224
bf6adc12 4225 Float_t causalityA = (1.0-pvertex->GetCausalityP()[0])*(1.0-pvertex->GetCausalityP()[1]);
4226 Float_t causalityB = TMath::Sqrt(TMath::Min(pvertex->GetCausalityP()[2],Float_t(0.7))*
81e97e0d 4227 TMath::Min(pvertex->GetCausalityP()[3],Float_t(0.7)));
628e7bb0 4228 //
b75d63a7 4229 //Bo: Float_t likelihood0 = (TMath::Exp(-pvertex->GetDistNorm())+0.1) *(pvertex->GetDist2()<0.5)*(pvertex->GetDistNorm()<5);
4230 Float_t lDistNorm = pvertex->GetDcaV0Daughters()/pvertex->GetDistSigma();
4231 Float_t likelihood0 = (TMath::Exp(-lDistNorm)+0.1) *(pvertex->GetDcaV0Daughters()<0.5)*(lDistNorm<5);
4232
4233 Float_t likelihood1 = TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/sigmap)+
4234 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(4.*sigmap))+
4235 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(8.*sigmap))+
4236 0.1*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/0.01);
628e7bb0 4237 //
bf6adc12 4238 if (causalityA<kCausality0Cut) v0OK = kFALSE;
4239 if (TMath::Sqrt(likelihood0*likelihood1)<kLikelihood01Cut) v0OK = kFALSE;
4240 if (likelihood1<kLikelihood1Cut) v0OK = kFALSE;
4241 if (TMath::Power(likelihood0*likelihood1*causalityB,0.33)<kCombinedCut) v0OK = kFALSE;
81e97e0d 4242
628e7bb0 4243 //
628e7bb0 4244 //
67c1e979 4245 if (kFALSE){
81e97e0d 4246 Bool_t gold = TMath::Abs(TMath::Abs(track0->GetLabel())-TMath::Abs(track1->GetLabel()))==1;
4247 cstream<<"It0"<<
4248 "Tr0.="<<track0<< //best without constrain
4249 "Tr1.="<<track1<< //best without constrain
4250 "Tr0B.="<<track0b<< //best without constrain after vertex
4251 "Tr1B.="<<track1b<< //best without constrain after vertex
4252 "Tr0C.="<<htrackc0<< //best with constrain if exist
4253 "Tr1C.="<<htrackc1<< //best with constrain if exist
4254 "Tr0L.="<<track0l<< //longest best
4255 "Tr1L.="<<track1l<< //longest best
b9671574 4256 "Esd0.="<<track0->GetESDtrack()<< // esd track0 params
4257 "Esd1.="<<track1->GetESDtrack()<< // esd track1 params
81e97e0d 4258 "V0.="<<pvertex<< //vertex properties
4259 "V0b.="<<&vertex2<< //vertex properties at "best" track
4260 "ND0="<<normdist[itrack0]<< //normalize distance for track0
4261 "ND1="<<normdist[itrack1]<< //normalize distance for track1
4262 "Gold="<<gold<< //
4263 // "RejectBase="<<rejectBase<< //rejection in First itteration
4264 "OK="<<v0OK<<
4265 "rmin="<<rmin<<
4266 "sigmad="<<sigmad<<
4267 "\n";
4268 }
4269 //if (rejectBase) continue;
628e7bb0 4270 //
81e97e0d 4271 pvertex->SetStatus(0);
4272 // if (rejectBase) {
4273 // pvertex->SetStatus(-100);
4274 //}
b75d63a7 4275 if (pvertex->GetV0CosineOfPointingAngle()>kMinPointAngle2) {
4276 //Bo: pvertex->SetESDindexes(track0->GetESDtrack()->GetID(),track1->GetESDtrack()->GetID());
4277 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());//Bo: consistency 0 for neg
4278 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());//Bo: consistency 1 for pos
67c1e979 4279 if (v0OK){
4280 // AliV0vertex vertexjuri(*track0,*track1);
4281 // vertexjuri.SetESDindexes(track0->fESDtrack->GetID(),track1->fESDtrack->GetID());
4282 // event->AddV0(&vertexjuri);
81e97e0d 4283 pvertex->SetStatus(100);
4284 }
d6a49f20 4285 pvertex->SetOnFlyStatus(kTRUE);
b75d63a7 4286 pvertex->ChangeMassHypothesis(kK0Short);
d6a49f20 4287 event->AddV0(pvertex);
628e7bb0 4288 }
51ad6848 4289 }
4290 }
628e7bb0 4291 //
4292 //
81e97e0d 4293 // delete temporary arrays
4294 //
4295 delete[] minPointAngle;
4296 delete[] maxr;
4297 delete[] minr;
4298 delete[] norm;
4299 delete[] normdist;
4300 delete[] normdist1;
4301 delete[] normdist0;
4302 delete[] dist;
4303 delete[] itsmap;
4304 delete[] helixes;
4305 delete pvertex;
e43c066c 4306}
4307
4308
67c1e979 4309void AliITStrackerMI::RefitV02(AliESD *event)
4310{
4311 //
4312 //try to refit V0s in the third path of the reconstruction
4313 //
4314 TTreeSRedirector &cstream = *fDebugStreamer;
4315 //
d6a49f20 4316 Int_t nv0s = event->GetNumberOfV0s();
67c1e979 4317 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
6c94f330 4318 AliV0 v0temp;
67c1e979 4319 for (Int_t iv0 = 0; iv0<nv0s;iv0++){
d6a49f20 4320 AliV0 * v0mi = (AliV0*)event->GetV0(iv0);
67c1e979 4321 if (!v0mi) continue;
4322 Int_t itrack0 = v0mi->GetIndex(0);
4323 Int_t itrack1 = v0mi->GetIndex(1);
4324 AliESDtrack *esd0 = event->GetTrack(itrack0);
4325 AliESDtrack *esd1 = event->GetTrack(itrack1);
4326 if (!esd0||!esd1) continue;
4327 AliITStrackMI tpc0(*esd0);
4328 AliITStrackMI tpc1(*esd1);
b75d63a7 4329 Double_t x,y,z; v0mi->GetXYZ(x,y,z); //I.B.
4330 Double_t alpha =TMath::ATan2(y,x); //I.B.
67c1e979 4331 if (v0mi->GetRr()>85){
4332 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
b75d63a7 4333 v0temp.SetParamN(tpc0);
4334 v0temp.SetParamP(tpc1);
67c1e979 4335 v0temp.Update(primvertex);
29641977 4336 if (kFALSE) cstream<<"Refit"<<
67c1e979 4337 "V0.="<<v0mi<<
4338 "V0refit.="<<&v0temp<<
4339 "Tr0.="<<&tpc0<<
4340 "Tr1.="<<&tpc1<<
4341 "\n";
b75d63a7 4342 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4343 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4344 v0mi->SetParamN(tpc0);
4345 v0mi->SetParamP(tpc1);
67c1e979 4346 v0mi->Update(primvertex);
4347 }
4348 }
4349 continue;
4350 }
4351 if (v0mi->GetRr()>35){
4352 CorrectForDeadZoneMaterial(&tpc0);
4353 CorrectForDeadZoneMaterial(&tpc1);
4354 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
b75d63a7 4355 v0temp.SetParamN(tpc0);
4356 v0temp.SetParamP(tpc1);
67c1e979 4357 v0temp.Update(primvertex);
29641977 4358 if (kFALSE) cstream<<"Refit"<<
67c1e979 4359 "V0.="<<v0mi<<
4360 "V0refit.="<<&v0temp<<
4361 "Tr0.="<<&tpc0<<
4362 "Tr1.="<<&tpc1<<
4363 "\n";
b75d63a7 4364 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4365 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4366 v0mi->SetParamN(tpc0);
4367 v0mi->SetParamP(tpc1);
67c1e979 4368 v0mi->Update(primvertex);
4369 }
4370 }
4371 continue;
4372 }
4373 CorrectForDeadZoneMaterial(&tpc0);
4374 CorrectForDeadZoneMaterial(&tpc1);
4375 // if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
4376 if (RefitAt(v0mi->GetRr(),&tpc0, v0mi->GetClusters(0)) && RefitAt(v0mi->GetRr(),&tpc1, v0mi->GetClusters(1))){
b75d63a7 4377 v0temp.SetParamN(tpc0);
4378 v0temp.SetParamP(tpc1);
67c1e979 4379 v0temp.Update(primvertex);
29641977 4380 if (kFALSE) cstream<<"Refit"<<
67c1e979 4381 "V0.="<<v0mi<<
4382 "V0refit.="<<&v0temp<<
4383 "Tr0.="<<&tpc0<<
4384 "Tr1.="<<&tpc1<<
4385 "\n";
b75d63a7 4386 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4387 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4388 v0mi->SetParamN(tpc0);
4389 v0mi->SetParamP(tpc1);
67c1e979 4390 v0mi->Update(primvertex);
4391 }
4392 }
4393 }
4394}
e43c066c 4395
51ad6848 4396
4397
4398
4399
4400
4401