1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
16 //-------------------------------------------------------------------------
17 // Implementation of the ITS tracker class
18 // It reads AliITSclusterV2 clusters and creates AliITStrackMI tracks
19 // and fills with them the ESD
20 // Origin: Marian Ivanov, CERN, Marian.Ivanov@cern.ch
21 // dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
23 //-------------------------------------------------------------------------
31 #include "AliESDV0MI.h"
33 #include "AliITSclusterV2.h"
34 #include "AliITSgeom.h"
35 #include "AliITSrecoV2.h"
36 #include "AliITStrackerMI.h"
39 ClassImp(AliITStrackerMI)
43 AliITStrackerMI::AliITSlayer AliITStrackerMI::fgLayers[kMaxLayer]; // ITS layers
45 AliITStrackerMI::AliITStrackerMI(const AliITSgeom *geom) : AliTracker() {
46 //--------------------------------------------------------------------
47 //This is the AliITStrackerMI constructor
48 //--------------------------------------------------------------------
49 AliITSgeom *g=(AliITSgeom*)geom;
53 for (i=1; i<kMaxLayer+1; i++) {
54 Int_t nlad=g->GetNladders(i);
55 Int_t ndet=g->GetNdetectors(i);
57 g->GetTrans(i,1,1,x,y,z);
58 Double_t r=TMath::Sqrt(x*x + y*y);
59 Double_t poff=TMath::ATan2(y,x);
62 g->GetTrans(i,1,2,x,y,z);
63 r += TMath::Sqrt(x*x + y*y);
64 g->GetTrans(i,2,1,x,y,z);
65 r += TMath::Sqrt(x*x + y*y);
66 g->GetTrans(i,2,2,x,y,z);
67 r += TMath::Sqrt(x*x + y*y);
70 new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet);
72 for (Int_t j=1; j<nlad+1; j++) {
73 for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors
74 Float_t x,y,zshift; g->GetTrans(i,j,k,x,y,zshift);
75 Double_t rot[9]; g->GetRotMatrix(i,j,k,rot);
77 Double_t phi=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
79 if (i==1) phi+=TMath::Pi();
80 Double_t cp=TMath::Cos(phi), sp=TMath::Sin(phi);
83 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
84 new(&det) AliITSdetector(r,phi);
93 fConstraint[0]=1; fConstraint[1]=0;
95 Double_t xyz[]={kXV,kYV,kZV}, ers[]={kSigmaXV,kSigmaYV,kSigmaZV};
98 for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=kLayersNotToSkip[i];
99 fLastLayerToTrackTo=kLastLayerToTrackTo;
103 void AliITStrackerMI::SetLayersNotToSkip(Int_t *l) {
104 //--------------------------------------------------------------------
105 //This function set masks of the layers which must be not skipped
106 //--------------------------------------------------------------------
107 for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=l[i];
110 Int_t AliITStrackerMI::LoadClusters(TTree *cTree) {
111 //--------------------------------------------------------------------
112 //This function loads ITS clusters
113 //--------------------------------------------------------------------
114 TBranch *branch=cTree->GetBranch("Clusters");
116 Error("LoadClusters"," can't get the branch !\n");
120 TClonesArray dummy("AliITSclusterV2",10000), *clusters=&dummy;
121 branch->SetAddress(&clusters);
125 for (Int_t i=0; i<kMaxLayer; i++) {
126 Int_t ndet=fgLayers[i].GetNdetectors();
127 Int_t jmax = j + fgLayers[i].GetNladders()*ndet;
128 for (; j<jmax; j++) {
129 if (!cTree->GetEvent(j)) continue;
130 Int_t ncl=clusters->GetEntriesFast();
131 SignDeltas(clusters,GetZ());
133 AliITSclusterV2 *c=(AliITSclusterV2*)clusters->UncheckedAt(ncl);
134 detector = c->GetDetectorIndex();
135 fgLayers[i].InsertCluster(new AliITSclusterV2(*c));
138 //add dead zone virtual "cluster"
140 for (Float_t ydead = 0; ydead < 1.31 ; ydead+=(i+1.)*0.018){
141 Int_t lab[4] = {0,0,0,detector};
142 Int_t info[3] = {0,0,0};
143 Float_t hit[5]={0,0,0.004/12.,0.001/12.,0};
144 if (i==0) hit[0] =ydead-0.4;
145 if (i==1) hit[0]=ydead-3.75;
147 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
148 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
150 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
151 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
153 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
154 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
156 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
157 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
159 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
160 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
162 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
163 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
169 fgLayers[i].ResetRoad(); //road defined by the cluster density
170 fgLayers[i].SortClusters();
176 void AliITStrackerMI::UnloadClusters() {
177 //--------------------------------------------------------------------
178 //This function unloads ITS clusters
179 //--------------------------------------------------------------------
180 for (Int_t i=0; i<kMaxLayer; i++) fgLayers[i].ResetClusters();
183 static Int_t CorrectForDeadZoneMaterial(AliITStrackMI *t) {
184 //--------------------------------------------------------------------
185 // Correction for the material between the TPC and the ITS
186 // (should it belong to the TPC code ?)
187 //--------------------------------------------------------------------
188 Double_t riw=80., diw=0.0053, x0iw=30; // TPC inner wall ?
189 Double_t rcd=61., dcd=0.0053, x0cd=30; // TPC "central drum" ?
190 Double_t yr=12.8, dr=0.03; // rods ?
191 Double_t zm=0.2, dm=0.40; // membrane
192 //Double_t rr=52., dr=0.19, x0r=24., yyr=7.77; //rails
193 Double_t rs=50., ds=0.001; // something belonging to the ITS (screen ?)
195 if (t->GetX() > riw) {
196 if (!t->PropagateTo(riw,diw,x0iw)) return 1;
197 if (TMath::Abs(t->GetY())>yr) t->CorrectForMaterial(dr);
198 if (TMath::Abs(t->GetZ())<zm) t->CorrectForMaterial(dm);
199 if (!t->PropagateTo(rcd,dcd,x0cd)) return 1;
200 //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z);
201 //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,dr,x0r);
202 if (!t->PropagateTo(rs,ds)) return 1;
203 } else if (t->GetX() < rs) {
204 if (!t->PropagateTo(rs,-ds)) return 1;
205 //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z);
206 //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,-dr,x0r);
207 if (!t->PropagateTo(rcd,-dcd,x0cd)) return 1;
208 if (!t->PropagateTo(riw+0.001,-diw,x0iw)) return 1;
210 ::Error("CorrectForDeadZoneMaterial","track is already in the dead zone !");
217 Int_t AliITStrackerMI::Clusters2Tracks(AliESD *event) {
218 //--------------------------------------------------------------------
219 // This functions reconstructs ITS tracks
220 // The clusters must be already loaded !
221 //--------------------------------------------------------------------
222 TObjArray itsTracks(15000);
224 {/* Read ESD tracks */
225 Int_t nentr=event->GetNumberOfTracks();
226 Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr);
228 AliESDtrack *esd=event->GetTrack(nentr);
230 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue;
231 if (esd->GetStatus()&AliESDtrack::kTPCout) continue;
232 if (esd->GetStatus()&AliESDtrack::kITSin) continue;
233 if (esd->GetKinkIndex(0)>0) continue; //kink daughter
236 t=new AliITStrackMI(*esd);
237 } catch (const Char_t *msg) {
238 Warning("Clusters2Tracks",msg);
242 t->fD[0] = t->GetD(GetX(),GetY());
243 t->fD[1] = t->GetZat(GetX())-GetZ();
244 Double_t vdist = TMath::Sqrt(t->fD[0]*t->fD[0]+t->fD[1]*t->fD[1]);
245 if (t->GetMass()<0.13) t->SetMass(0.13957); // MI look to the esd - mass hypothesys !!!!!!!!!!!
247 t->fExpQ = TMath::Max(0.8*t->fESDtrack->GetTPCsignal(),30.);
249 if (TMath::Abs(t->fD[0])>10) {
254 if (TMath::Abs(vdist)>20) {
258 if (TMath::Abs(1/t->Get1Pt())<0.120) {
263 if (CorrectForDeadZoneMaterial(t)!=0) {
264 Warning("Clusters2Tracks",
265 "failed to correct for the material in the dead zone !\n");
269 t->fReconstructed = kFALSE;
270 itsTracks.AddLast(t);
272 } /* End Read ESD tracks */
275 Int_t nentr=itsTracks.GetEntriesFast();
276 fTrackHypothesys.Expand(nentr);
277 MakeCoeficients(nentr);
279 for (fPass=0; fPass<2; fPass++) {
280 Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
281 for (Int_t i=0; i<nentr; i++) {
282 // cerr<<fPass<<" "<<i<<'\r';
283 fCurrentEsdTrack = i;
284 AliITStrackMI *t=(AliITStrackMI*)itsTracks.UncheckedAt(i);
285 if (t==0) continue; //this track has been already tracked
286 if (t->fReconstructed&&(t->fNUsed<1.5)) continue; //this track was already "succesfully" reconstructed
287 if ( (TMath::Abs(t->GetD(GetX(),GetY())) >3.) && fConstraint[fPass]) continue;
288 if ( (TMath::Abs(t->GetZat(GetX())-GetZ())>3.) && fConstraint[fPass]) continue;
290 Int_t tpcLabel=t->GetLabel(); //save the TPC track label
292 ResetTrackToFollow(*t);
295 FollowProlongationTree(t,i);
298 SortTrackHypothesys(fCurrentEsdTrack,20,0); //MI change
300 AliITStrackMI * besttrack = GetBestHypothesys(fCurrentEsdTrack,t,15);
301 if (!besttrack) continue;
302 besttrack->SetLabel(tpcLabel);
303 // besttrack->CookdEdx();
305 besttrack->fFakeRatio=1.;
306 CookLabel(besttrack,0.); //For comparison only
307 // besttrack->UpdateESDtrack(AliESDtrack::kITSin);
310 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
312 if ( besttrack->GetNumberOfClusters()<5 && fConstraint[fPass]) {
315 if (besttrack->fChi2MIP[0]+besttrack->fNUsed>3.5) continue;
316 if ( (TMath::Abs(besttrack->fD[0]*besttrack->fD[0]+besttrack->fD[1]*besttrack->fD[1])>0.1) && fConstraint[fPass]) continue;
317 //delete itsTracks.RemoveAt(i);
318 t->fReconstructed = kTRUE;
321 GetBestHypothesysMIP(itsTracks);
324 //GetBestHypothesysMIP(itsTracks);
329 Int_t entries = fTrackHypothesys.GetEntriesFast();
330 for (Int_t ientry=0;ientry<entries;ientry++){
331 TObjArray * array =(TObjArray*)fTrackHypothesys.UncheckedAt(ientry);
332 if (array) array->Delete();
333 delete fTrackHypothesys.RemoveAt(ientry);
336 fTrackHypothesys.Delete();
337 Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk);
343 Int_t AliITStrackerMI::PropagateBack(AliESD *event) {
344 //--------------------------------------------------------------------
345 // This functions propagates reconstructed ITS tracks back
346 // The clusters must be loaded !
347 //--------------------------------------------------------------------
348 Int_t nentr=event->GetNumberOfTracks();
349 Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
352 for (Int_t i=0; i<nentr; i++) {
353 AliESDtrack *esd=event->GetTrack(i);
355 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
356 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
360 t=new AliITStrackMI(*esd);
361 } catch (const Char_t *msg) {
362 Warning("PropagateBack",msg);
366 t->fExpQ = TMath::Max(0.8*t->fESDtrack->GetTPCsignal(),30.);
368 ResetTrackToFollow(*t);
370 // propagete to vertex [SR, GSI 17.02.2003]
371 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
372 if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {
373 if (fTrackToFollow.PropagateToVertex()) {
374 fTrackToFollow.StartTimeIntegral();
376 fTrackToFollow.PropagateTo(3.,-0.0028,65.19);
379 fTrackToFollow.ResetCovariance(); fTrackToFollow.ResetClusters();
380 if (RefitAt(49.,&fTrackToFollow,t)) {
381 if (CorrectForDeadZoneMaterial(&fTrackToFollow)!=0) {
382 Warning("PropagateBack",
383 "failed to correct for the material in the dead zone !\n");
387 fTrackToFollow.SetLabel(t->GetLabel());
388 //fTrackToFollow.CookdEdx();
389 CookLabel(&fTrackToFollow,0.); //For comparison only
390 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
391 //UseClusters(&fTrackToFollow);
397 Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk);
402 Int_t AliITStrackerMI::RefitInward(AliESD *event) {
403 //--------------------------------------------------------------------
404 // This functions refits ITS tracks using the
405 // "inward propagated" TPC tracks
406 // The clusters must be loaded !
407 //--------------------------------------------------------------------
408 Int_t nentr=event->GetNumberOfTracks();
409 Info("RefitInward", "Number of ESD tracks: %d\n", nentr);
412 for (Int_t i=0; i<nentr; i++) {
413 AliESDtrack *esd=event->GetTrack(i);
415 if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
416 if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
417 if (esd->GetStatus()&AliESDtrack::kTPCout)
418 if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
422 t=new AliITStrackMI(*esd);
423 } catch (const Char_t *msg) {
424 Warning("RefitInward",msg);
428 t->fExpQ = TMath::Max(0.8*t->fESDtrack->GetTPCsignal(),30.);
429 if (CorrectForDeadZoneMaterial(t)!=0) {
430 Warning("RefitInward",
431 "failed to correct for the material in the dead zone !\n");
436 ResetTrackToFollow(*t);
437 fTrackToFollow.ResetClusters();
439 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
440 fTrackToFollow.ResetCovariance();
443 if (RefitAt(3.7, &fTrackToFollow, t)) {
444 fTrackToFollow.SetLabel(t->GetLabel());
445 // fTrackToFollow.CookdEdx();
446 CookdEdx(&fTrackToFollow);
448 CookLabel(&fTrackToFollow,0.0); //For comparison only
450 if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {//The beam pipe
451 Double_t a=fTrackToFollow.GetAlpha();
452 Double_t cs=TMath::Cos(a),sn=TMath::Sin(a);
453 Double_t xv= GetX()*cs + GetY()*sn;
454 Double_t yv=-GetX()*sn + GetY()*cs;
456 Double_t c=fTrackToFollow.GetC(), snp=fTrackToFollow.GetSnp();
457 Double_t x=fTrackToFollow.GetX(), y=fTrackToFollow.GetY();
458 Double_t tgfv=-(c*(x-xv)-snp)/(c*(y-yv) + TMath::Sqrt(1.-snp*snp));
459 Double_t fv=TMath::ATan(tgfv);
461 cs=TMath::Cos(fv); sn=TMath::Sin(fv);
463 yv=-xv*sn + yv*cs; xv=x;
465 if (fTrackToFollow.Propagate(fv+a,xv)) {
466 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit);
467 Float_t d=fTrackToFollow.GetD(GetX(),GetY());
468 Float_t z=fTrackToFollow.GetZ()-GetZ();
469 fTrackToFollow.GetESDtrack()->SetImpactParameters(d,z);
470 //UseClusters(&fTrackToFollow);
472 AliITSclusterV2 c; c.SetY(yv); c.SetZ(GetZ());
473 c.SetSigmaY2(GetSigmaY()*GetSigmaY());
474 c.SetSigmaZ2(GetSigmaZ()*GetSigmaZ());
475 Double_t chi2=fTrackToFollow.GetPredictedChi2(&c);
476 //Double_t chi2=GetPredictedChi2MI(&fTrackToFollow,&c,fI);
478 if (fTrackToFollow.Update(&c,-chi2,0))
479 //if (UpdateMI(&fTrackToFollow,&c,-chi2,0))
480 fTrackToFollow.SetConstrainedESDtrack(chi2);
489 Info("RefitInward","Number of refitted tracks: %d\n",ntrk);
494 AliCluster *AliITStrackerMI::GetCluster(Int_t index) const {
495 //--------------------------------------------------------------------
496 // Return pointer to a given cluster
497 //--------------------------------------------------------------------
498 Int_t l=(index & 0xf0000000) >> 28;
499 Int_t c=(index & 0x0fffffff) >> 00;
500 return fgLayers[l].GetCluster(c);
504 void AliITStrackerMI::FollowProlongationTree(AliITStrackMI * otrack, Int_t esdindex)
506 //--------------------------------------------------------------------
507 // Follow prolongation tree
508 //--------------------------------------------------------------------
510 //setup tree of the prolongations
512 static AliITStrackMI tracks[7][100];
513 AliITStrackMI *currenttrack;
514 static AliITStrackMI currenttrack1;
515 static AliITStrackMI currenttrack2;
516 static AliITStrackMI backuptrack;
518 Int_t nindexes[7][100];
519 Float_t normalizedchi2[100];
520 for (Int_t ilayer=0;ilayer<6;ilayer++) ntracks[ilayer]=0;
522 new (&(tracks[6][0])) AliITStrackMI(*otrack);
527 // follow prolongations
528 for (Int_t ilayer=5;ilayer>=0;ilayer--){
530 AliITSlayer &layer=fgLayers[ilayer];
531 Double_t r=layer.GetR();
537 for (Int_t itrack =0;itrack<ntracks[ilayer+1];itrack++){
539 if (ntracks[ilayer]>=100) break;
540 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].fNSkipped>0) nskipped++;
541 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].fNUsed>2.) nused++;
542 if (ntracks[ilayer]>15+ilayer){
543 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].fNSkipped>0 && nskipped>4+ilayer) continue;
544 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].fNUsed>2. && nused>3) continue;
547 new(¤ttrack1) AliITStrackMI(tracks[ilayer+1][nindexes[ilayer+1][itrack]]);
548 if (ilayer==3 || ilayer==1) {
549 Double_t rs=0.5*(fgLayers[ilayer+1].GetR() + r);
550 Double_t d=0.0034, x0=38.6;
551 if (ilayer==1) {rs=9.; d=0.0097; x0=42;}
552 if (!currenttrack1.PropagateTo(rs,d,x0)) {
557 //find intersection with layer
559 if (!currenttrack1.GetGlobalXYZat(r,x,y,z)) {
562 Double_t phi=TMath::ATan2(y,x);
563 Int_t idet=layer.FindDetectorIndex(phi,z);
567 //propagate to the intersection
568 const AliITSdetector &det=layer.GetDetector(idet);
570 new(¤ttrack2) AliITStrackMI(currenttrack1);
571 if (!currenttrack1.Propagate(phi,det.GetR())) {
574 currenttrack2.Propagate(phi,det.GetR()); //
575 currenttrack1.SetDetectorIndex(idet);
576 currenttrack2.SetDetectorIndex(idet);
580 Double_t dz=7.5*TMath::Sqrt(currenttrack1.GetSigmaZ2() + 16.*kSigmaZ2[ilayer]);
581 Double_t dy=7.5*TMath::Sqrt(currenttrack1.GetSigmaY2() + 16.*kSigmaY2[ilayer]);
583 Bool_t isBoundary=kFALSE;
584 if (currenttrack1.GetY()-dy< det.GetYmin()+0.2) isBoundary = kTRUE;
585 if (currenttrack1.GetY()+dy> det.GetYmax()-0.2) isBoundary = kTRUE;
586 if (currenttrack1.GetZ()-dz< det.GetZmin()+0.2) isBoundary = kTRUE;
587 if (currenttrack1.GetZ()+dz> det.GetZmax()-0.2) isBoundary = kTRUE;
589 if (isBoundary){ // track at boundary between detectors
590 Float_t maxtgl = TMath::Abs(currenttrack1.GetTgl());
591 if (maxtgl>1) maxtgl=1;
592 dz = TMath::Sqrt(dz*dz+0.25*maxtgl*maxtgl);
594 Float_t maxsnp = TMath::Abs(currenttrack1.GetSnp());
595 if (maxsnp>0.95) continue;
596 //if (maxsnp>0.5) maxsnp=0.5;
597 dy=TMath::Sqrt(dy*dy+0.25*maxsnp*maxsnp);
600 Double_t zmin=currenttrack1.GetZ() - dz;
601 Double_t zmax=currenttrack1.GetZ() + dz;
602 Double_t ymin=currenttrack1.GetY() + r*phi - dy;
603 Double_t ymax=currenttrack1.GetY() + r*phi + dy;
604 layer.SelectClusters(zmin,zmax,ymin,ymax);
606 // loop over all possible prolongations
608 Double_t msz=1./((currenttrack1.GetSigmaZ2() + 16.*kSigmaZ2[ilayer]));
609 Double_t msy=1./((currenttrack1.GetSigmaY2() + 16.*kSigmaY2[ilayer]));
610 if (fConstraint[fPass]){
617 const AliITSclusterV2 *c=0; Int_t ci=-1;
618 Double_t chi2=12345.;
620 currenttrack = ¤ttrack1;
621 while ((c=layer.GetNextCluster(ci))!=0) {
622 if (ntracks[ilayer]>95) break; //space for skipped clusters
623 Bool_t change =kFALSE;
624 if (c->GetQ()==0 && (deadzone==1)) continue;
625 Int_t idet=c->GetDetectorIndex();
626 if (currenttrack->GetDetectorIndex()!=idet) {
627 const AliITSdetector &det=layer.GetDetector(idet);
629 if (!currenttrack2.GetProlongationFast(det.GetPhi(),det.GetR(),y,z)) continue;
630 Float_t pz = (z - c->GetZ()) , py=(y - c->GetY());
631 if (pz*pz*msz+py*py*msy>1.) continue;
633 new (&backuptrack) AliITStrackMI(currenttrack2);
635 currenttrack =¤ttrack2;
636 if (!currenttrack->Propagate(det.GetPhi(),det.GetR())) {
637 new (currenttrack) AliITStrackMI(backuptrack);
641 currenttrack->SetDetectorIndex(idet);
644 Float_t pz = (currenttrack->GetZ() - c->GetZ()) , py=(currenttrack->GetY() - c->GetY());
645 if (pz*pz*msz+py*py*msy>1.) continue;
648 chi2=GetPredictedChi2MI(currenttrack,c,ilayer);
649 if (chi2<kMaxChi2s[ilayer]){
650 if (c->GetQ()==0) deadzone=1; // take dead zone only once
651 if (ntracks[ilayer]>=100) continue;
652 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
653 updatetrack->fClIndex[ilayer]=0;
655 new (¤ttrack2) AliITStrackMI(backuptrack);
658 if (!UpdateMI(updatetrack,c,chi2,(ilayer<<28)+ci)) continue;
659 updatetrack->SetSampledEdx(c->GetQ(),updatetrack->GetNumberOfClusters()-1); //b.b.
662 updatetrack->fNDeadZone++;
663 updatetrack->fDeadZoneProbability=GetDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2()));
666 updatetrack->fNUsed++;
669 Double_t d=layer.GetThickness(updatetrack->GetY(),updatetrack->GetZ(),x0);
670 updatetrack->CorrectForMaterial(d,x0);
671 if (fConstraint[fPass]) {
672 updatetrack->fConstrain = fConstraint[fPass];
674 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
675 Double_t xyz[]={GetX(),GetY(),GetZ()};
676 Double_t ptfactor = 1;
677 Double_t ers[]={GetSigmaX()*ptfactor,GetSigmaY()*ptfactor,GetSigmaZ()};
678 Bool_t isPrim = kTRUE;
680 updatetrack->fD[0] = updatetrack->GetD(GetX(),GetY());
681 updatetrack->fD[1] = updatetrack->GetZat(GetX())-GetZ();
682 if ( TMath::Abs(updatetrack->fD[0]/(1.+ilayer))>0.4 || TMath::Abs(updatetrack->fD[1]/(1.+ilayer))>0.4) isPrim=kFALSE;
684 if (isPrim) updatetrack->Improve(d,xyz,ers);
685 } //apply vertex constrain
687 } // create new hypothesy
688 } // loop over possible cluster prolongation
689 // if (fConstraint[fPass]&&itrack<2&¤ttrack1.fNSkipped==0 && deadzone==0){
690 if (itrack<2&¤ttrack1.fNSkipped==0 && deadzone==0&&ntracks[ilayer]<100){
691 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
692 vtrack->fClIndex[ilayer]=0;
694 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
695 Double_t xyz[]={GetX(),GetY(),GetZ()};
696 Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
697 vtrack->Improve(d,xyz,ers);
702 } //loop over track candidates
708 for (Int_t itrack=0;itrack<ntracks[ilayer];itrack++){
709 normalizedchi2[itrack] = NormalizedChi2(&tracks[ilayer][itrack],ilayer);
710 if ( normalizedchi2[itrack]<3+0.5*ilayer) golds++;
711 if (ilayer>4) accepted++;
713 if ( fConstraint[fPass] && normalizedchi2[itrack]<kMaxNormChi2C[ilayer]+1) accepted++;
714 if (!fConstraint[fPass] && normalizedchi2[itrack]<kMaxNormChi2NonC[ilayer]+1) accepted++;
717 TMath::Sort(ntracks[ilayer],normalizedchi2,nindexes[ilayer],kFALSE);
718 ntracks[ilayer] = TMath::Min(accepted,7+2*ilayer);
719 if (ntracks[ilayer]<golds+2+ilayer) ntracks[ilayer]=TMath::Min(golds+2+ilayer,accepted);
720 if (ntracks[ilayer]>90) ntracks[ilayer]=90;
722 //printf("%d\t%d\t%d\t%d\t%d\t%d\n",ntracks[0],ntracks[1],ntracks[2],ntracks[3],ntracks[4],ntracks[5]);
724 for (Int_t i=0;i<TMath::Min(20,ntracks[0]);i++) {
725 AliITStrackMI & track= tracks[0][nindexes[0][i]];
726 if (!fConstraint[fPass]&&track.fNormChi2[0]>7.)continue;
727 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
729 for (Int_t i=0;i<TMath::Min(4,ntracks[1]);i++) {
730 AliITStrackMI & track= tracks[1][nindexes[1][i]];
731 if (track.GetNumberOfClusters()<4) continue;
732 if (!fConstraint[fPass]&&track.fNormChi2[1]>7.)continue;
733 if (fConstraint[fPass]) track.fNSkipped+=1;
734 if (!fConstraint[fPass]) {
735 track.fD[0] = track.GetD(GetX(),GetY());
736 track.fNSkipped+=4./(4.+8.*TMath::Abs(track.fD[0]));
737 if (track.fN+track.fNDeadZone+track.fNSkipped>6) {
738 track.fNSkipped = 6-track.fN+track.fNDeadZone;
741 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
745 if (!fConstraint[fPass]){
746 for (Int_t i=0;i<TMath::Min(3,ntracks[2]);i++) {
747 AliITStrackMI & track= tracks[2][nindexes[2][i]];
748 if (track.GetNumberOfClusters()<4) continue;
749 if (!fConstraint[fPass]&&track.fNormChi2[2]>7.)continue;
750 if (fConstraint[fPass]) track.fNSkipped+=2;
751 if (!fConstraint[fPass]){
752 track.fD[0] = track.GetD(GetX(),GetY());
753 track.fNSkipped+= 7./(7.+8.*TMath::Abs(track.fD[0]));
754 if (track.fN+track.fNDeadZone+track.fNSkipped>6) {
755 track.fNSkipped = 6-track.fN+track.fNDeadZone;
758 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
764 AliITStrackerMI::AliITSlayer & AliITStrackerMI::GetLayer(Int_t layer) const
766 //--------------------------------------------------------------------
769 return fgLayers[layer];
771 AliITStrackerMI::AliITSlayer::AliITSlayer() {
772 //--------------------------------------------------------------------
773 //default AliITSlayer constructor
774 //--------------------------------------------------------------------
779 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
781 fClusterTracks[0][i]=-1;
782 fClusterTracks[1][i]=-1;
783 fClusterTracks[2][i]=-1;
784 fClusterTracks[3][i]=-1;
788 AliITStrackerMI::AliITSlayer::
789 AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd) {
790 //--------------------------------------------------------------------
791 //main AliITSlayer constructor
792 //--------------------------------------------------------------------
793 fR=r; fPhiOffset=p; fZOffset=z;
794 fNladders=nl; fNdetectors=nd;
795 fDetectors=new AliITSdetector[fNladders*fNdetectors];
800 fRoad=2*fR*TMath::Sqrt(3.14/1.);//assuming that there's only one cluster
803 AliITStrackerMI::AliITSlayer::~AliITSlayer() {
804 //--------------------------------------------------------------------
805 // AliITSlayer destructor
806 //--------------------------------------------------------------------
808 for (Int_t i=0; i<fN; i++) delete fClusters[i];
809 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
811 fClusterTracks[0][i]=-1;
812 fClusterTracks[1][i]=-1;
813 fClusterTracks[2][i]=-1;
814 fClusterTracks[3][i]=-1;
818 void AliITStrackerMI::AliITSlayer::ResetClusters() {
819 //--------------------------------------------------------------------
820 // This function removes loaded clusters
821 //--------------------------------------------------------------------
822 for (Int_t i=0; i<fN; i++) delete fClusters[i];
823 for (Int_t i=0; i<kMaxClusterPerLayer;i++){
825 fClusterTracks[0][i]=-1;
826 fClusterTracks[1][i]=-1;
827 fClusterTracks[2][i]=-1;
828 fClusterTracks[3][i]=-1;
835 void AliITStrackerMI::AliITSlayer::ResetWeights() {
836 //--------------------------------------------------------------------
837 // This function reset weights of the clusters
838 //--------------------------------------------------------------------
839 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
841 fClusterTracks[0][i]=-1;
842 fClusterTracks[1][i]=-1;
843 fClusterTracks[2][i]=-1;
844 fClusterTracks[3][i]=-1;
846 for (Int_t i=0; i<fN;i++) {
847 AliITSclusterV2 * cl = (AliITSclusterV2*)GetCluster(i);
848 if (cl&&cl->IsUsed()) cl->Use();
853 void AliITStrackerMI::AliITSlayer::ResetRoad() {
854 //--------------------------------------------------------------------
855 // This function calculates the road defined by the cluster density
856 //--------------------------------------------------------------------
858 for (Int_t i=0; i<fN; i++) {
859 if (TMath::Abs(fClusters[i]->GetZ())<fR) n++;
861 //if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n);
862 if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n);
865 Int_t AliITStrackerMI::AliITSlayer::InsertCluster(AliITSclusterV2 *c) {
866 //--------------------------------------------------------------------
867 //This function adds a cluster to this layer
868 //--------------------------------------------------------------------
869 if (fN==kMaxClusterPerLayer) {
870 ::Error("InsertCluster","Too many clusters !\n");
874 if (fN==0) {fClusters[fN++]=c; return 0;}
875 Int_t i=FindClusterIndex(c->GetZ());
876 memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliITSclusterV2*));
877 memmove(fY+i+1 ,fY+i,(fN-i)*sizeof(Float_t));
878 memmove(fZ+i+1 ,fZ+i,(fN-i)*sizeof(Float_t));
879 fClusters[i]=c; fN++;
881 AliITSdetector &det=GetDetector(c->GetDetectorIndex());
882 Double_t y=fR*det.GetPhi() + c->GetY();
883 if (y>2.*fR*TMath::Pi()) y -= 2.*fR*TMath::Pi();
886 if (c->GetY()<det.GetYmin()) det.SetYmin(c->GetY());
887 if (c->GetY()>det.GetYmax()) det.SetYmax(c->GetY());
888 if (c->GetZ()<det.GetZmin()) det.SetZmin(c->GetZ());
889 if (c->GetZ()>det.GetZmax()) det.SetZmax(c->GetZ());
894 void AliITStrackerMI::AliITSlayer::SortClusters()
901 for (Int_t i=0;i<fN;i++){
902 if (fY[i]<fYB[0]) fYB[0]=fY[i];
903 if (fY[i]>fYB[1]) fYB[1]=fY[i];
904 fClusterIndex[i] = i;
908 fDy5 = (fYB[1]-fYB[0])/5.;
909 fDy10 = (fYB[1]-fYB[0])/10.;
910 fDy20 = (fYB[1]-fYB[0])/20.;
911 for (Int_t i=0;i<6;i++) fN5[i] =0;
912 for (Int_t i=0;i<11;i++) fN10[i]=0;
913 for (Int_t i=0;i<21;i++) fN20[i]=0;
915 for (Int_t i=0;i<6;i++) {fBy5[i][0] = fYB[0]+(i-0.75)*fDy5; fBy5[i][1] = fYB[0]+(i+0.75)*fDy5;}
916 for (Int_t i=0;i<11;i++) {fBy10[i][0] = fYB[0]+(i-0.75)*fDy10; fBy10[i][1] = fYB[0]+(i+0.75)*fDy10;}
917 for (Int_t i=0;i<21;i++) {fBy20[i][0] = fYB[0]+(i-0.75)*fDy20; fBy20[i][1] = fYB[0]+(i+0.75)*fDy20;}
920 for (Int_t i=0;i<fN;i++) for (Int_t irot=-1;irot<=1;irot++){
921 Float_t curY = fY[i]+irot*2.*TMath::Pi()*fR;
922 if (curY<fYB[0]-fDy5) continue;
923 if (curY>fYB[1]+fDy5) continue;
926 if (TMath::Abs(fYB[1]-fYB[0])<=0) continue;
927 Float_t fslice = TMath::Nint(10.*(curY-fYB[0])/(fYB[1]-fYB[0]));
928 Float_t ymiddle = fYB[0]+fslice*fDy10;
929 for (Int_t di =-1;di<=1;di++){
930 if (TMath::Abs(curY-(ymiddle+(float)di*fDy10))<0.75*fDy10){
932 Int_t slice = int(fslice+21.0001)-21+di;
933 if (slice<0) continue;
934 if (slice>10) continue;
935 if (fN10[slice]>=kMaxClusterPerLayer10) break;
936 fClusters10[slice][fN10[slice]] = fClusters[i];
937 fY10[slice][fN10[slice]] = curY;
938 fZ10[slice][fN10[slice]] = fZ[i];
939 fClusterIndex10[slice][fN10[slice]]=i;
945 fslice = TMath::Nint(5.*(curY-fYB[0])/(fYB[1]-fYB[0]));
946 ymiddle = fYB[0]+fslice*fDy5;
947 for (Int_t di =-1;di<=1;di++){
948 if (TMath::Abs(curY-(ymiddle+(float)di*fDy5))<0.75*fDy5){
950 Int_t slice = int(fslice+21.0001)-21+di;
951 if (slice<0) continue;
952 if (slice>5) continue;
953 if (fN5[slice]>=kMaxClusterPerLayer5) break;
954 fClusters5[slice][fN5[slice]] = fClusters[i];
955 fY5[slice][fN5[slice]] = curY;
956 fZ5[slice][fN5[slice]] = fZ[i];
957 fClusterIndex5[slice][fN5[slice]]=i;
963 fslice = TMath::Nint(20.*(curY-fYB[0])/(fYB[1]-fYB[0]));
964 ymiddle = fYB[0]+fslice*fDy20;
965 for (Int_t di =-1;di<=1;di++){
966 if (TMath::Abs(curY-(ymiddle+(float)di*fDy20))<0.75*fDy20){
968 Int_t slice = int(fslice+21.0001)-21+di;
969 if (slice<0) continue;
970 if (slice>20) continue;
971 if (fN20[slice]>=kMaxClusterPerLayer20) break;
972 fClusters20[slice][fN20[slice]] = fClusters[i];
973 fY20[slice][fN20[slice]] = curY;
974 fZ20[slice][fN20[slice]] = fZ[i];
975 fClusterIndex20[slice][fN20[slice]]=i;
985 Int_t AliITStrackerMI::AliITSlayer::FindClusterIndex(Float_t z) const {
986 //--------------------------------------------------------------------
987 // This function returns the index of the nearest cluster
988 //--------------------------------------------------------------------
991 if (fCurrentSlice<0) {
1000 if (ncl==0) return 0;
1001 Int_t b=0, e=ncl-1, m=(b+e)/2;
1002 for (; b<e; m=(b+e)/2) {
1003 // if (z > fClusters[m]->GetZ()) b=m+1;
1004 if (z > zcl[m]) b=m+1;
1010 void AliITStrackerMI::AliITSlayer::
1011 SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1012 //--------------------------------------------------------------------
1013 // This function sets the "window"
1014 //--------------------------------------------------------------------
1015 fI=FindClusterIndex(zmin); fZmax=zmax;
1016 fImax = TMath::Min(FindClusterIndex(zmax)+1,fN);
1017 Double_t circle=2*TMath::Pi()*fR;
1018 if (ymax>circle) { ymax-=circle; ymin-=circle; }
1019 fYmin=ymin; fYmax=ymax;
1025 void AliITStrackerMI::AliITSlayer::
1026 SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1027 //--------------------------------------------------------------------
1028 // This function sets the "window"
1029 //--------------------------------------------------------------------
1031 Double_t circle=2*TMath::Pi()*fR;
1032 fYmin = ymin; fYmax =ymax;
1033 Float_t ymiddle = (fYmin+fYmax)*0.5;
1034 if (ymiddle<fYB[0]) {fYmin+=circle; fYmax+=circle;ymiddle+=circle;}
1036 if (ymiddle>fYB[1]) {fYmin-=circle; fYmax-=circle;ymiddle-=circle;}
1041 fClustersCs = fClusters;
1042 fClusterIndexCs = fClusterIndex;
1048 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy20){
1049 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy20);
1050 if (slice<0) slice=0;
1051 if (slice>20) slice=20;
1052 Bool_t isOK = (fYmin>fBy20[slice][0]&&fYmax<fBy20[slice][1]);
1054 fCurrentSlice=slice;
1055 fClustersCs = fClusters20[fCurrentSlice];
1056 fClusterIndexCs = fClusterIndex20[fCurrentSlice];
1057 fYcs = fY20[fCurrentSlice];
1058 fZcs = fZ20[fCurrentSlice];
1059 fNcs = fN20[fCurrentSlice];
1064 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy10){
1065 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy10);
1066 if (slice<0) slice=0;
1067 if (slice>10) slice=10;
1068 Bool_t isOK = (fYmin>fBy10[slice][0]&&fYmax<fBy10[slice][1]);
1070 fCurrentSlice=slice;
1071 fClustersCs = fClusters10[fCurrentSlice];
1072 fClusterIndexCs = fClusterIndex10[fCurrentSlice];
1073 fYcs = fY10[fCurrentSlice];
1074 fZcs = fZ10[fCurrentSlice];
1075 fNcs = fN10[fCurrentSlice];
1080 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy5){
1081 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy5);
1082 if (slice<0) slice=0;
1083 if (slice>5) slice=5;
1084 Bool_t isOK = (fYmin>fBy5[slice][0]&&fYmax<fBy5[slice][1]);
1086 fCurrentSlice=slice;
1087 fClustersCs = fClusters5[fCurrentSlice];
1088 fClusterIndexCs = fClusterIndex5[fCurrentSlice];
1089 fYcs = fY5[fCurrentSlice];
1090 fZcs = fZ5[fCurrentSlice];
1091 fNcs = fN5[fCurrentSlice];
1095 fI=FindClusterIndex(zmin); fZmax=zmax;
1096 fImax = TMath::Min(FindClusterIndex(zmax)+1,fNcs);
1102 const AliITSclusterV2 *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci){
1103 //--------------------------------------------------------------------
1104 // This function returns clusters within the "window"
1105 //--------------------------------------------------------------------
1106 const AliITSclusterV2 *cluster=0;
1107 for (Int_t i=fI; i<fN; i++) {
1108 const AliITSclusterV2 *c=fClusters[i];
1109 if (c->GetZ() > fZmax) break;
1110 // if (c->IsUsed()) continue;
1111 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
1112 Double_t y=fR*det.GetPhi() + c->GetY();
1114 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
1115 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
1117 if (y<fYmin) continue;
1118 if (y>fYmax) continue;
1127 const AliITSclusterV2 *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci){
1128 //--------------------------------------------------------------------
1129 // This function returns clusters within the "window"
1130 //--------------------------------------------------------------------
1132 if (fCurrentSlice<0){
1133 Double_t rpi2 = 2.*fR*TMath::Pi();
1134 for (Int_t i=fI; i<fImax; i++) {
1136 if (fYmax<y) y -= rpi2;
1137 if (y<fYmin) continue;
1138 if (y>fYmax) continue;
1139 if (fClusters[i]->GetQ()==0&&fSkip==2) continue;
1142 return fClusters[i];
1146 for (Int_t i=fI; i<fImax; i++) {
1147 if (fYcs[i]<fYmin) continue;
1148 if (fYcs[i]>fYmax) continue;
1149 if (fClustersCs[i]->GetQ()==0&&fSkip==2) continue;
1150 ci=fClusterIndexCs[i];
1152 return fClustersCs[i];
1160 Int_t AliITStrackerMI::AliITSlayer::
1161 FindDetectorIndex(Double_t phi, Double_t z) const {
1162 //--------------------------------------------------------------------
1163 //This function finds the detector crossed by the track
1164 //--------------------------------------------------------------------
1165 Double_t dphi=-(phi-fPhiOffset);
1166 if (dphi < 0) dphi += 2*TMath::Pi();
1167 else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi();
1168 Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5);
1169 if (np>=fNladders) np-=fNladders;
1170 if (np<0) np+=fNladders;
1172 Double_t dz=fZOffset-z;
1173 Int_t nz=Int_t(dz*(fNdetectors-1)*0.5/fZOffset+0.5);
1174 if (nz>=fNdetectors) return -1;
1175 if (nz<0) return -1;
1177 return np*fNdetectors + nz;
1180 Double_t AliITStrackerMI::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0)
1182 //--------------------------------------------------------------------
1183 //This function returns the layer thickness at this point (units X0)
1184 //--------------------------------------------------------------------
1187 if (43<fR&&fR<45) { //SSD2
1190 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1191 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1192 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1193 for (Int_t i=0; i<12; i++) {
1194 if (TMath::Abs(z-3.9*(i+0.5))<0.15) {
1195 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1199 if (TMath::Abs(z+3.9*(i+0.5))<0.15) {
1200 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1204 if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1205 if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1208 if (37<fR&&fR<41) { //SSD1
1211 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1212 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1213 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1214 for (Int_t i=0; i<11; i++) {
1215 if (TMath::Abs(z-3.9*i)<0.15) {
1216 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1220 if (TMath::Abs(z+3.9*i)<0.15) {
1221 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1225 if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1226 if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1229 if (13<fR&&fR<26) { //SDD
1232 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1234 if (TMath::Abs(y-1.80)<0.55) {
1236 for (Int_t j=0; j<20; j++) {
1237 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1238 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1241 if (TMath::Abs(y+1.80)<0.55) {
1243 for (Int_t j=0; j<20; j++) {
1244 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1245 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1249 for (Int_t i=0; i<4; i++) {
1250 if (TMath::Abs(z-7.3*i)<0.60) {
1252 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1255 if (TMath::Abs(z+7.3*i)<0.60) {
1257 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1262 if (6<fR&&fR<8) { //SPD2
1263 Double_t dd=0.0063; x0=21.5;
1265 if (TMath::Abs(y-3.08)>0.5) d+=dd;
1266 //if (TMath::Abs(y-3.08)>0.45) d+=dd;
1267 if (TMath::Abs(y-3.03)<0.10) {d+=0.014;}
1269 if (3<fR&&fR<5) { //SPD1
1270 Double_t dd=0.0063; x0=21.5;
1272 if (TMath::Abs(y+0.21)>0.6) d+=dd;
1273 //if (TMath::Abs(y+0.21)>0.45) d+=dd;
1274 if (TMath::Abs(y+0.10)<0.10) {d+=0.014;}
1280 Double_t AliITStrackerMI::GetEffectiveThickness(Double_t y,Double_t z) const
1282 //--------------------------------------------------------------------
1283 //Returns the thickness between the current layer and the vertex (units X0)
1284 //--------------------------------------------------------------------
1285 Double_t d=0.0028*3*3; //beam pipe
1288 Double_t xn=fgLayers[fI].GetR();
1289 for (Int_t i=0; i<fI; i++) {
1290 Double_t xi=fgLayers[i].GetR();
1291 d+=fgLayers[i].GetThickness(y,z,x0)*xi*xi;
1300 Double_t xi=0.5*(fgLayers[3].GetR()+fgLayers[4].GetR());
1307 Int_t AliITStrackerMI::AliITSlayer::InRoad() const {
1308 //--------------------------------------------------------------------
1309 // This function returns number of clusters within the "window"
1310 //--------------------------------------------------------------------
1312 for (Int_t i=fI; i<fN; i++) {
1313 const AliITSclusterV2 *c=fClusters[i];
1314 if (c->GetZ() > fZmax) break;
1315 if (c->IsUsed()) continue;
1316 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
1317 Double_t y=fR*det.GetPhi() + c->GetY();
1319 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
1320 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
1322 if (y<fYmin) continue;
1323 if (y>fYmax) continue;
1330 AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *t,const AliITStrackMI *c) {
1331 //--------------------------------------------------------------------
1332 // This function refits the track "t" at the position "x" using
1333 // the clusters from "c"
1334 //--------------------------------------------------------------------
1335 Int_t index[kMaxLayer];
1337 for (k=0; k<kMaxLayer; k++) index[k]=-1;
1338 Int_t nc=c->GetNumberOfClusters();
1339 for (k=0; k<nc; k++) {
1340 Int_t idx=c->GetClusterIndex(k),nl=(idx&0xf0000000)>>28;
1344 Int_t from, to, step;
1345 if (xx > t->GetX()) {
1346 from=0; to=kMaxLayer;
1349 from=kMaxLayer-1; to=-1;
1353 for (Int_t i=from; i != to; i += step) {
1354 AliITSlayer &layer=fgLayers[i];
1355 Double_t r=layer.GetR();
1358 Double_t hI=i-0.5*step;
1359 if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) {
1360 Double_t rs=0.5*(fgLayers[i-step].GetR() + r);
1361 Double_t d=0.0034, x0=38.6;
1362 if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;}
1363 if (!t->PropagateTo(rs,-step*d,x0)) {
1369 // remember old position [SR, GSI 18.02.2003]
1370 Double_t oldX=0., oldY=0., oldZ=0.;
1371 if (t->IsStartedTimeIntegral() && step==1) {
1372 t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ);
1377 if (!t->GetGlobalXYZat(r,x,y,z)) {
1380 Double_t phi=TMath::ATan2(y,x);
1381 Int_t idet=layer.FindDetectorIndex(phi,z);
1385 const AliITSdetector &det=layer.GetDetector(idet);
1387 if (!t->Propagate(phi,det.GetR())) {
1390 t->SetDetectorIndex(idet);
1392 const AliITSclusterV2 *cl=0;
1393 Double_t maxchi2=1000.*kMaxChi2;
1397 const AliITSclusterV2 *c=(AliITSclusterV2 *)GetCluster(idx);
1398 if (idet != c->GetDetectorIndex()) {
1399 idet=c->GetDetectorIndex();
1400 const AliITSdetector &det=layer.GetDetector(idet);
1401 if (!t->Propagate(det.GetPhi(),det.GetR())) {
1404 t->SetDetectorIndex(idet);
1406 //Double_t chi2=t->GetPredictedChi2(c);
1407 Int_t layer = (idx & 0xf0000000) >> 28;;
1408 Double_t chi2=GetPredictedChi2MI(t,c,layer);
1418 if (t->GetNumberOfClusters()>2) {
1419 Double_t dz=4*TMath::Sqrt(t->GetSigmaZ2()+kSigmaZ2[i]);
1420 Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+kSigmaY2[i]);
1421 Double_t zmin=t->GetZ() - dz;
1422 Double_t zmax=t->GetZ() + dz;
1423 Double_t ymin=t->GetY() + phi*r - dy;
1424 Double_t ymax=t->GetY() + phi*r + dy;
1425 layer.SelectClusters(zmin,zmax,ymin,ymax);
1427 const AliITSclusterV2 *c=0; Int_t ci=-1;
1428 while ((c=layer.GetNextCluster(ci))!=0) {
1429 if (idet != c->GetDetectorIndex()) continue;
1430 Double_t chi2=t->GetPredictedChi2(c);
1431 if (chi2<maxchi2) { cl=c; maxchi2=chi2; idx=ci; }
1436 //if (!t->Update(cl,maxchi2,idx)) {
1437 if (!UpdateMI(t,cl,maxchi2,idx)) {
1440 t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
1445 Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0);
1446 t->CorrectForMaterial(-step*d,x0);
1449 // track time update [SR, GSI 17.02.2003]
1450 if (t->IsStartedTimeIntegral() && step==1) {
1451 Double_t newX, newY, newZ;
1452 t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
1453 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
1454 (oldZ-newZ)*(oldZ-newZ);
1455 t->AddTimeStep(TMath::Sqrt(dL2));
1461 if (!t->PropagateTo(xx,0.,0.)) return kFALSE;
1466 Double_t AliITStrackerMI::GetNormalizedChi2(AliITStrackMI * track, Int_t mode)
1469 // calculate normalized chi2
1470 // return NormalizedChi2(track,0);
1473 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
1474 // track->fdEdxMismatch=0;
1475 Float_t dedxmismatch =0;
1476 Float_t *ny = GetNy(fCurrentEsdTrack), *nz = GetNz(fCurrentEsdTrack);
1478 for (Int_t i = 0;i<6;i++){
1479 if (track->fClIndex[i]>0){
1480 Float_t cerry, cerrz;
1481 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1483 { cerry= track->fSigmaY[i]; cerrz = track->fSigmaZ[i];}
1486 Float_t cchi2 = (track->fDy[i]*track->fDy[i]/cerry)+(track->fDz[i]*track->fDz[i]/cerrz);
1488 Float_t ratio = track->fNormQ[i]/track->fExpQ;
1490 cchi2+=(0.5-ratio)*10.;
1491 //track->fdEdxMismatch+=(0.5-ratio)*10.;
1492 dedxmismatch+=(0.5-ratio)*10.;
1496 AliITSclusterV2 * cl = (AliITSclusterV2*)GetCluster( track->fClIndex[i]);
1497 Double_t delta = cl->GetNy()+cl->GetNz()-ny[i]-nz[i];
1498 if (delta>1) chi2 +=0.5*TMath::Min(delta/2,2.);
1499 if (i<2) chi2+=2*cl->GetDeltaProbability();
1505 if (TMath::Abs(track->fdEdxMismatch-dedxmismatch)>0.0001){
1506 track->fdEdxMismatch = dedxmismatch;
1510 for (Int_t i = 0;i<4;i++){
1511 if (track->fClIndex[i]>0){
1512 Float_t cerry, cerrz;
1513 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1514 else { cerry= track->fSigmaY[i]; cerrz = track->fSigmaZ[i];}
1517 chi2+= (track->fDy[i]*track->fDy[i]/cerry);
1518 chi2+= (track->fDz[i]*track->fDz[i]/cerrz);
1522 for (Int_t i = 4;i<6;i++){
1523 if (track->fClIndex[i]>0){
1524 Float_t cerry, cerrz;
1525 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1526 else { cerry= track->fSigmaY[i]; cerrz = track->fSigmaZ[i];}
1529 Float_t cerryb, cerrzb;
1530 if (ny[i+6]>0) {cerryb = erry[i+6]; cerrzb=errz[i+6];}
1531 else { cerryb= track->fSigmaY[i+6]; cerrzb = track->fSigmaZ[i+6];}
1534 chi2+= TMath::Min((track->fDy[i+6]*track->fDy[i+6]/cerryb),track->fDy[i]*track->fDy[i]/cerry);
1535 chi2+= TMath::Min((track->fDz[i+6]*track->fDz[i+6]/cerrzb),track->fDz[i]*track->fDz[i]/cerrz);
1540 if (track->fESDtrack->GetTPCsignal()>85){
1541 Float_t ratio = track->fdEdx/track->fESDtrack->GetTPCsignal();
1543 chi2+=(0.5-ratio)*5.;
1546 chi2+=(ratio-2.0)*3;
1550 Double_t match = TMath::Sqrt(track->fChi22);
1551 if (track->fConstrain) match/=track->GetNumberOfClusters();
1552 if (!track->fConstrain) match/=track->GetNumberOfClusters()-2.;
1553 if (match<0) match=0;
1554 Float_t deadzonefactor = (track->fNDeadZone>0) ? 3*(1.1-track->fDeadZoneProbability):0.;
1555 Double_t normchi2 = 2*track->fNSkipped+match+deadzonefactor+(1+(2*track->fNSkipped+deadzonefactor)/track->GetNumberOfClusters())*
1556 (chi2)/TMath::Max(double(sum-track->fNSkipped),
1557 1./(1.+track->fNSkipped));
1563 Double_t AliITStrackerMI::GetMatchingChi2(AliITStrackMI * track1, AliITStrackMI * track2)
1566 // return matching chi2 between two tracks
1567 AliITStrackMI track3(*track2);
1568 track3.Propagate(track1->GetAlpha(),track1->GetX());
1570 vec(0,0)=track1->fP0-track3.fP0;
1571 vec(1,0)=track1->fP1-track3.fP1;
1572 vec(2,0)=track1->fP2-track3.fP2;
1573 vec(3,0)=track1->fP3-track3.fP3;
1574 vec(4,0)=track1->fP4-track3.fP4;
1577 cov(0,0) = track1->fC00+track3.fC00;
1578 cov(1,1) = track1->fC11+track3.fC11;
1579 cov(2,2) = track1->fC22+track3.fC22;
1580 cov(3,3) = track1->fC33+track3.fC33;
1581 cov(4,4) = track1->fC44+track3.fC44;
1583 cov(0,1)=cov(1,0) = track1->fC10+track3.fC10;
1584 cov(0,2)=cov(2,0) = track1->fC20+track3.fC20;
1585 cov(0,3)=cov(3,0) = track1->fC30+track3.fC30;
1586 cov(0,4)=cov(4,0) = track1->fC40+track3.fC40;
1588 cov(1,2)=cov(2,1) = track1->fC21+track3.fC21;
1589 cov(1,3)=cov(3,1) = track1->fC31+track3.fC31;
1590 cov(1,4)=cov(4,1) = track1->fC41+track3.fC41;
1592 cov(2,3)=cov(3,2) = track1->fC32+track3.fC32;
1593 cov(2,4)=cov(4,2) = track1->fC42+track3.fC42;
1595 cov(3,4)=cov(4,3) = track1->fC43+track3.fC43;
1598 TMatrixD vec2(cov,TMatrixD::kMult,vec);
1599 TMatrixD chi2(vec2,TMatrixD::kTransposeMult,vec);
1603 Double_t AliITStrackerMI::GetDeadZoneProbability(Double_t zpos, Double_t zerr)
1606 // return probability that given point - characterized by z position and error is in dead zone
1608 Double_t probability =0;
1609 Double_t absz = TMath::Abs(zpos);
1610 Double_t nearestz = (absz<2)? 0.:7.1;
1611 if (TMath::Abs(absz-nearestz)>0.25+3*zerr) return 0;
1612 Double_t zmin=0, zmax=0;
1614 zmin = -7.25; zmax = -6.95;
1617 zmin = 7.0; zmax =7.3;
1620 zmin = -0.75; zmax = 1.5;
1622 probability = (TMath::Erf((zpos-zmin)/zerr) - TMath::Erf((zpos-zmax)/zerr))*0.5;
1627 Double_t AliITStrackerMI::GetTruncatedChi2(AliITStrackMI * track, Float_t fac)
1630 // calculate normalized chi2
1632 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
1634 for (Int_t i = 0;i<6;i++){
1635 if (TMath::Abs(track->fDy[i])>0){
1636 chi2[i]= (track->fDy[i]/erry[i])*(track->fDy[i]/erry[i]);
1637 chi2[i]+= (track->fDz[i]/errz[i])*(track->fDz[i]/errz[i]);
1640 else{chi2[i]=10000;}
1643 TMath::Sort(6,chi2,index,kFALSE);
1644 Float_t max = float(ncl)*fac-1.;
1645 Float_t sumchi=0, sumweight=0;
1646 for (Int_t i=0;i<max+1;i++){
1647 Float_t weight = (i<max)?1.:(max+1.-i);
1648 sumchi+=weight*chi2[index[i]];
1651 Double_t normchi2 = sumchi/sumweight;
1656 Double_t AliITStrackerMI::GetInterpolatedChi2(AliITStrackMI * forwardtrack, AliITStrackMI * backtrack)
1659 // calculate normalized chi2
1660 // if (forwardtrack->fNUsed>0.3*float(forwardtrack->GetNumberOfClusters())) return 10000;
1663 for (Int_t i=0;i<6;i++){
1664 if ( (backtrack->fSigmaY[i]<0.000000001) || (forwardtrack->fSigmaY[i]<0.000000001)) continue;
1665 Double_t sy1 = forwardtrack->fSigmaY[i];
1666 Double_t sz1 = forwardtrack->fSigmaZ[i];
1667 Double_t sy2 = backtrack->fSigmaY[i];
1668 Double_t sz2 = backtrack->fSigmaZ[i];
1669 if (i<2){ sy2=1000.;sz2=1000;}
1671 Double_t dy0 = (forwardtrack->fDy[i]/(sy1*sy1) +backtrack->fDy[i]/(sy2*sy2))/(1./(sy1*sy1)+1./(sy2*sy2));
1672 Double_t dz0 = (forwardtrack->fDz[i]/(sz1*sz1) +backtrack->fDz[i]/(sz2*sz2))/(1./(sz1*sz1)+1./(sz2*sz2));
1674 Double_t nz0 = dz0*TMath::Sqrt((1./(sz1*sz1)+1./(sz2*sz2)));
1675 Double_t ny0 = dy0*TMath::Sqrt((1./(sy1*sy1)+1./(sy2*sy2)));
1677 res+= nz0*nz0+ny0*ny0;
1680 if (npoints>1) return
1681 TMath::Max(TMath::Abs(0.3*forwardtrack->Get1Pt())-0.5,0.)+
1682 //2*forwardtrack->fNUsed+
1683 res/TMath::Max(double(npoints-forwardtrack->fNSkipped),
1684 1./(1.+forwardtrack->fNSkipped));
1692 Float_t *AliITStrackerMI::GetWeight(Int_t index) {
1693 //--------------------------------------------------------------------
1694 // Return pointer to a given cluster
1695 //--------------------------------------------------------------------
1696 Int_t l=(index & 0xf0000000) >> 28;
1697 Int_t c=(index & 0x0fffffff) >> 00;
1698 return fgLayers[l].GetWeight(c);
1701 void AliITStrackerMI::RegisterClusterTracks(AliITStrackMI* track,Int_t id)
1703 //---------------------------------------------
1704 // register track to the list
1705 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
1706 Int_t index = track->GetClusterIndex(icluster);
1707 Int_t l=(index & 0xf0000000) >> 28;
1708 Int_t c=(index & 0x0fffffff) >> 00;
1709 if (c>fgLayers[l].fN) continue;
1710 for (Int_t itrack=0;itrack<4;itrack++){
1711 if (fgLayers[l].fClusterTracks[itrack][c]<0){
1712 fgLayers[l].fClusterTracks[itrack][c]=id;
1718 void AliITStrackerMI::UnRegisterClusterTracks(AliITStrackMI* track, Int_t id)
1720 //---------------------------------------------
1721 // unregister track from the list
1722 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
1723 Int_t index = track->GetClusterIndex(icluster);
1724 Int_t l=(index & 0xf0000000) >> 28;
1725 Int_t c=(index & 0x0fffffff) >> 00;
1726 if (c>fgLayers[l].fN) continue;
1727 for (Int_t itrack=0;itrack<4;itrack++){
1728 if (fgLayers[l].fClusterTracks[itrack][c]==id){
1729 fgLayers[l].fClusterTracks[itrack][c]=-1;
1734 Float_t AliITStrackerMI::GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSclusterV2 *clist[6])
1736 //-------------------------------------------------------------
1737 //get number of shared clusters
1738 //-------------------------------------------------------------
1740 for (Int_t i=0;i<6;i++) { list[i]=-1, clist[i]=0;}
1741 // mean number of clusters
1742 Float_t *ny = GetNy(id), *nz = GetNz(id);
1745 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
1746 Int_t index = track->GetClusterIndex(icluster);
1747 Int_t l=(index & 0xf0000000) >> 28;
1748 Int_t c=(index & 0x0fffffff) >> 00;
1749 if (c>fgLayers[l].fN) continue;
1751 printf("problem\n");
1753 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(index);
1757 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
1758 if (l>2&&track->fNormQ[l]/track->fExpQ>3.5) continue;
1760 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
1763 deltan = (cl->GetNz()-nz[l]);
1765 if (deltan>2.0) continue; // extended - highly probable shared cluster
1766 weight = 2./TMath::Max(3.+deltan,2.);
1768 for (Int_t itrack=0;itrack<4;itrack++){
1769 if (fgLayers[l].fClusterTracks[itrack][c]>=0 && fgLayers[l].fClusterTracks[itrack][c]!=id){
1771 clist[l] = (AliITSclusterV2*)GetCluster(index);
1777 track->fNUsed=shared;
1781 Int_t AliITStrackerMI::GetOverlapTrack(AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6],Int_t overlist[6])
1784 // find first shared track
1786 // mean number of clusters
1787 Float_t *ny = GetNy(trackID), *nz = GetNz(trackID);
1789 for (Int_t i=0;i<6;i++) overlist[i]=-1;
1790 Int_t sharedtrack=100000;
1791 Int_t tracks[24],trackindex=0;
1792 for (Int_t i=0;i<24;i++) {tracks[i]=-1;}
1794 for (Int_t icluster=0;icluster<6;icluster++){
1795 if (clusterlist[icluster]<0) continue;
1796 Int_t index = clusterlist[icluster];
1797 Int_t l=(index & 0xf0000000) >> 28;
1798 Int_t c=(index & 0x0fffffff) >> 00;
1800 printf("problem\n");
1802 if (c>fgLayers[l].fN) continue;
1803 //if (l>3) continue;
1804 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(index);
1807 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
1808 if (l>2&&track->fNormQ[l]/track->fExpQ>3.5) continue;
1810 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
1813 deltan = (cl->GetNz()-nz[l]);
1815 if (deltan>2.0) continue; // extended - highly probable shared cluster
1817 for (Int_t itrack=3;itrack>=0;itrack--){
1818 if (fgLayers[l].fClusterTracks[itrack][c]<0) continue;
1819 if (fgLayers[l].fClusterTracks[itrack][c]!=trackID){
1820 tracks[trackindex] = fgLayers[l].fClusterTracks[itrack][c];
1825 if (trackindex==0) return -1;
1827 sharedtrack = tracks[0];
1829 if (trackindex==2) sharedtrack =TMath::Min(tracks[0],tracks[1]);
1832 Int_t track[24], cluster[24];
1833 for (Int_t i=0;i<trackindex;i++){ track[i]=-1; cluster[i]=0;}
1836 for (Int_t i=0;i<trackindex;i++){
1837 if (tracks[i]<0) continue;
1838 track[index] = tracks[i];
1840 for (Int_t j=i+1;j<trackindex;j++){
1841 if (tracks[j]<0) continue;
1842 if (tracks[j]==tracks[i]){
1850 for (Int_t i=0;i<index;i++){
1851 if (cluster[index]>max) {
1852 sharedtrack=track[index];
1859 if (sharedtrack>=100000) return -1;
1861 // make list of overlaps
1863 for (Int_t icluster=0;icluster<6;icluster++){
1864 if (clusterlist[icluster]<0) continue;
1865 Int_t index = clusterlist[icluster];
1866 Int_t l=(index & 0xf0000000) >> 28;
1867 Int_t c=(index & 0x0fffffff) >> 00;
1868 if (c>fgLayers[l].fN) continue;
1869 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(index);
1871 if (cl->GetNy()>2) continue;
1872 if (cl->GetNz()>2) continue;
1875 if (cl->GetNy()>3) continue;
1876 if (cl->GetNz()>3) continue;
1879 for (Int_t itrack=3;itrack>=0;itrack--){
1880 if (fgLayers[l].fClusterTracks[itrack][c]<0) continue;
1881 if (fgLayers[l].fClusterTracks[itrack][c]==sharedtrack){
1891 AliITStrackMI * AliITStrackerMI::GetBest2Tracks(Int_t trackID1, Int_t trackID2, Float_t th0, Float_t th1){
1893 // try to find track hypothesys without conflicts
1894 // with minimal chi2;
1895 TClonesArray *arr1 = (TClonesArray*)fTrackHypothesys.At(trackID1);
1896 Int_t entries1 = arr1->GetEntriesFast();
1897 TClonesArray *arr2 = (TClonesArray*)fTrackHypothesys.At(trackID2);
1898 if (!arr2) return (AliITStrackMI*) arr1->UncheckedAt(0);
1899 Int_t entries2 = arr2->GetEntriesFast();
1900 if (entries2<=0) return (AliITStrackMI*) arr1->UncheckedAt(0);
1902 AliITStrackMI * track10=(AliITStrackMI*) arr1->UncheckedAt(0);
1903 AliITStrackMI * track20=(AliITStrackMI*) arr2->UncheckedAt(0);
1904 if (TMath::Abs(1./track10->Get1Pt())>0.5+TMath::Abs(1/track20->Get1Pt())) return track10;
1906 for (Int_t itrack=0;itrack<entries1;itrack++){
1907 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
1908 UnRegisterClusterTracks(track,trackID1);
1911 for (Int_t itrack=0;itrack<entries2;itrack++){
1912 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
1913 UnRegisterClusterTracks(track,trackID2);
1917 Float_t maxconflicts=6;
1918 Double_t maxchi2 =1000.;
1920 // get weight of hypothesys - using best hypothesy
1923 Int_t list1[6],list2[6];
1924 AliITSclusterV2 *clist1[6], *clist2[6] ;
1925 RegisterClusterTracks(track10,trackID1);
1926 RegisterClusterTracks(track20,trackID2);
1927 Float_t conflict1 = GetNumberOfSharedClusters(track10,trackID1,list1,clist1);
1928 Float_t conflict2 = GetNumberOfSharedClusters(track20,trackID2,list2,clist2);
1929 UnRegisterClusterTracks(track10,trackID1);
1930 UnRegisterClusterTracks(track20,trackID2);
1933 Float_t chi21 =0,chi22=0,ncl1=0,ncl2=0;
1934 Float_t nerry[6],nerrz[6];
1935 Float_t *erry1=GetErrY(trackID1),*errz1 = GetErrZ(trackID1);
1936 Float_t *erry2=GetErrY(trackID2),*errz2 = GetErrZ(trackID2);
1937 for (Int_t i=0;i<6;i++){
1938 if ( (erry1[i]>0) && (erry2[i]>0)) {
1939 nerry[i] = TMath::Min(erry1[i],erry2[i]);
1940 nerrz[i] = TMath::Min(errz1[i],errz2[i]);
1942 nerry[i] = TMath::Max(erry1[i],erry2[i]);
1943 nerrz[i] = TMath::Max(errz1[i],errz2[i]);
1945 if (TMath::Abs(track10->fDy[i])>0.000000000000001){
1946 chi21 += track10->fDy[i]*track10->fDy[i]/(nerry[i]*nerry[i]);
1947 chi21 += track10->fDz[i]*track10->fDz[i]/(nerrz[i]*nerrz[i]);
1950 if (TMath::Abs(track20->fDy[i])>0.000000000000001){
1951 chi22 += track20->fDy[i]*track20->fDy[i]/(nerry[i]*nerry[i]);
1952 chi22 += track20->fDz[i]*track20->fDz[i]/(nerrz[i]*nerrz[i]);
1960 Float_t d1 = TMath::Sqrt(track10->fD[0]*track10->fD[0]+track10->fD[1]*track10->fD[1])+0.1;
1961 Float_t d2 = TMath::Sqrt(track20->fD[0]*track20->fD[0]+track20->fD[1]*track20->fD[1])+0.1;
1962 Float_t s1 = TMath::Sqrt(track10->GetSigmaY2()*track10->GetSigmaZ2());
1963 Float_t s2 = TMath::Sqrt(track20->GetSigmaY2()*track20->GetSigmaZ2());
1965 w1 = (d2/(d1+d2)+ 2*s2/(s1+s2)+
1966 +s2/(s1+s2)*0.5*(chi22+2.)/(chi21+chi22+4.)
1967 +1.*TMath::Abs(1./track10->Get1Pt())/(TMath::Abs(1./track10->Get1Pt())+TMath::Abs(1./track20->Get1Pt()))
1969 w2 = (d1/(d1+d2)+ 2*s1/(s1+s2)+
1970 s1/(s1+s2)*0.5*(chi21+2.)/(chi21+chi22+4.)
1971 +1.*TMath::Abs(1./track20->Get1Pt())/(TMath::Abs(1./track10->Get1Pt())+TMath::Abs(1./track20->Get1Pt()))
1974 Double_t sumw = w1+w2;
1978 w1 = (d2+0.5)/(d1+d2+1.);
1979 w2 = (d1+0.5)/(d1+d2+1.);
1981 // Float_t maxmax = w1*track10->fChi2MIP[0]+w2*track20->fChi2MIP[0]+w1*conflict1+w2*conflict2+1.;
1982 //Float_t maxconflicts0 = w1*conflict1+w2*conflict2;
1984 // get pair of "best" hypothesys
1986 Float_t * ny1 = GetNy(trackID1), * nz1 = GetNz(trackID1);
1987 Float_t * ny2 = GetNy(trackID2), * nz2 = GetNz(trackID2);
1989 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
1990 AliITStrackMI * track1=(AliITStrackMI*) arr1->UncheckedAt(itrack1);
1991 //if (track1->fFakeRatio>0) continue;
1992 RegisterClusterTracks(track1,trackID1);
1993 for (Int_t itrack2=0;itrack2<entries2;itrack2++){
1994 AliITStrackMI * track2=(AliITStrackMI*) arr2->UncheckedAt(itrack2);
1996 // Float_t current = w1*track1->fChi2MIP[0]+w2*track2->fChi2MIP[0];
1997 //if (track2->fFakeRatio>0) continue;
1999 RegisterClusterTracks(track2,trackID2);
2000 Int_t list1[6],list2[6];
2001 AliITSclusterV2 *clist1[6], *clist2[6] ;
2002 Float_t cconflict1 = GetNumberOfSharedClusters(track1,trackID1,list1,clist1);
2003 Float_t cconflict2 = GetNumberOfSharedClusters(track2,trackID2,list2,clist2);
2004 UnRegisterClusterTracks(track2,trackID2);
2006 if (track1->fConstrain) nskipped+=w1*track1->fNSkipped;
2007 if (track2->fConstrain) nskipped+=w2*track2->fNSkipped;
2008 if (nskipped>0.5) continue;
2010 //if ( w1*conflict1+w2*conflict2>maxconflicts0) continue;
2011 if (conflict1+1<cconflict1) continue;
2012 if (conflict2+1<cconflict2) continue;
2016 for (Int_t i=0;i<6;i++){
2018 Float_t c1 =0.; // conflict coeficients
2020 if (clist1[i]&&clist2[i]){
2023 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-TMath::Max(ny1[i],ny2[i])-TMath::Max(nz1[i],nz2[i]));
2026 deltan = (clist1[i]->GetNz()-TMath::Max(nz1[i],nz2[i]));
2028 c1 = 2./TMath::Max(3.+deltan,2.);
2029 c2 = 2./TMath::Max(3.+deltan,2.);
2035 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-ny1[i]-nz1[i]);
2038 deltan = (clist1[i]->GetNz()-nz1[i]);
2040 c1 = 2./TMath::Max(3.+deltan,2.);
2047 deltan = (clist2[i]->GetNy()+clist2[i]->GetNz()-ny2[i]-nz2[i]);
2050 deltan = (clist2[i]->GetNz()-nz2[i]);
2052 c2 = 2./TMath::Max(3.+deltan,2.);
2057 Double_t chi21=0,chi22=0;
2058 if (TMath::Abs(track1->fDy[i])>0.) {
2059 chi21 = (track1->fDy[i]/track1->fSigmaY[i])*(track1->fDy[i]/track1->fSigmaY[i])+
2060 (track1->fDz[i]/track1->fSigmaZ[i])*(track1->fDz[i]/track1->fSigmaZ[i]);
2061 //chi21 = (track1->fDy[i]*track1->fDy[i])/(nerry[i]*nerry[i])+
2062 // (track1->fDz[i]*track1->fDz[i])/(nerrz[i]*nerrz[i]);
2064 if (TMath::Abs(track1->fSigmaY[i]>0.)) c1=1;
2067 if (TMath::Abs(track2->fDy[i])>0.) {
2068 chi22 = (track2->fDy[i]/track2->fSigmaY[i])*(track2->fDy[i]/track2->fSigmaY[i])+
2069 (track2->fDz[i]/track2->fSigmaZ[i])*(track2->fDz[i]/track2->fSigmaZ[i]);
2070 //chi22 = (track2->fDy[i]*track2->fDy[i])/(nerry[i]*nerry[i])+
2071 // (track2->fDz[i]*track2->fDz[i])/(nerrz[i]*nerrz[i]);
2074 if (TMath::Abs(track2->fSigmaY[i]>0.)) c2=1;
2076 sumchi2+=w1*(1.+c1)*(1+c1)*(chi21+c1)+w2*(1.+c2)*(1+c2)*(chi22+c2);
2077 if (chi21>0) sum+=w1;
2078 if (chi22>0) sum+=w2;
2081 Double_t norm = sum-w1*track1->fNSkipped-w2*track2->fNSkipped;
2082 if (norm<0) norm =1/(w1*track1->fNSkipped+w2*track2->fNSkipped);
2083 Double_t normchi2 = 2*conflict+sumchi2/sum;
2084 if ( normchi2 <maxchi2 ){
2087 maxconflicts = conflict;
2091 UnRegisterClusterTracks(track1,trackID1);
2094 // if (maxconflicts<4 && maxchi2<th0){
2095 if (maxchi2<th0*2.){
2096 Float_t orig = track10->fFakeRatio*track10->GetNumberOfClusters();
2097 AliITStrackMI* track1=(AliITStrackMI*) arr1->UncheckedAt(index1);
2098 track1->fChi2MIP[5] = maxconflicts;
2099 track1->fChi2MIP[6] = maxchi2;
2100 track1->fChi2MIP[7] = 0.01+orig-(track1->fFakeRatio*track1->GetNumberOfClusters());
2101 // track1->UpdateESDtrack(AliESDtrack::kITSin);
2102 track1->fChi2MIP[8] = index1;
2103 fBestTrackIndex[trackID1] =index1;
2104 UpdateESDtrack(track1, AliESDtrack::kITSin);
2106 else if (track10->fChi2MIP[0]<th1){
2107 track10->fChi2MIP[5] = maxconflicts;
2108 track10->fChi2MIP[6] = maxchi2;
2109 // track10->UpdateESDtrack(AliESDtrack::kITSin);
2110 UpdateESDtrack(track10,AliESDtrack::kITSin);
2113 for (Int_t itrack=0;itrack<entries1;itrack++){
2114 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
2115 UnRegisterClusterTracks(track,trackID1);
2118 for (Int_t itrack=0;itrack<entries2;itrack++){
2119 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
2120 UnRegisterClusterTracks(track,trackID2);
2123 if (track10->fConstrain&&track10->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track10->fChi2MIP[1]<kMaxChi2PerCluster[1]
2124 &&track10->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track10->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2125 // if (track10->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track10->fChi2MIP[1]<kMaxChi2PerCluster[1]
2126 // &&track10->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track10->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2127 RegisterClusterTracks(track10,trackID1);
2129 if (track20->fConstrain&&track20->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track20->fChi2MIP[1]<kMaxChi2PerCluster[1]
2130 &&track20->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track20->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2131 //if (track20->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track20->fChi2MIP[1]<kMaxChi2PerCluster[1]
2132 // &&track20->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track20->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2133 RegisterClusterTracks(track20,trackID2);
2139 void AliITStrackerMI::UseClusters(const AliKalmanTrack *t, Int_t from) const {
2140 //--------------------------------------------------------------------
2141 // This function marks clusters assigned to the track
2142 //--------------------------------------------------------------------
2143 AliTracker::UseClusters(t,from);
2145 AliITSclusterV2 *c=(AliITSclusterV2 *)GetCluster(t->GetClusterIndex(0));
2146 //if (c->GetQ()>2) c->Use();
2147 if (c->GetSigmaZ2()>0.1) c->Use();
2148 c=(AliITSclusterV2 *)GetCluster(t->GetClusterIndex(1));
2149 //if (c->GetQ()>2) c->Use();
2150 if (c->GetSigmaZ2()>0.1) c->Use();
2155 void AliITStrackerMI::AddTrackHypothesys(AliITStrackMI * track, Int_t esdindex)
2157 //------------------------------------------------------------------
2158 // add track to the list of hypothesys
2159 //------------------------------------------------------------------
2161 if (esdindex>=fTrackHypothesys.GetEntriesFast()) fTrackHypothesys.Expand(esdindex*2+10);
2163 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2165 array = new TObjArray(10);
2166 fTrackHypothesys.AddAt(array,esdindex);
2168 array->AddLast(track);
2171 void AliITStrackerMI::SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode)
2173 //-------------------------------------------------------------------
2174 // compress array of track hypothesys
2175 // keep only maxsize best hypothesys
2176 //-------------------------------------------------------------------
2177 if (esdindex>fTrackHypothesys.GetEntriesFast()) return;
2178 if (! (fTrackHypothesys.At(esdindex)) ) return;
2179 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2180 Int_t entries = array->GetEntriesFast();
2182 //- find preliminary besttrack as a reference
2183 Float_t minchi2=10000;
2185 AliITStrackMI * besttrack=0;
2186 for (Int_t itrack=0;itrack<array->GetEntriesFast();itrack++){
2187 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2188 if (!track) continue;
2189 Float_t chi2 = NormalizedChi2(track,0);
2191 Int_t tpcLabel=track->fESDtrack->GetTPCLabel();
2192 track->SetLabel(tpcLabel);
2194 track->fFakeRatio=1.;
2195 CookLabel(track,0.); //For comparison only
2197 //if (chi2<kMaxChi2PerCluster[0]&&track->fFakeRatio==0){
2198 if (chi2<kMaxChi2PerCluster[0]){
2199 if (track->GetNumberOfClusters()<maxn) continue;
2200 maxn = track->GetNumberOfClusters();
2207 delete array->RemoveAt(itrack);
2210 if (!besttrack) return;
2213 //take errors of best track as a reference
2214 Float_t *erry = GetErrY(esdindex), *errz = GetErrZ(esdindex);
2215 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
2216 for (Int_t i=0;i<6;i++) {
2217 if (besttrack->fClIndex[i]>0){
2218 erry[i] = besttrack->fSigmaY[i]; erry[i+6] = besttrack->fSigmaY[i+6];
2219 errz[i] = besttrack->fSigmaZ[i]; errz[i+6] = besttrack->fSigmaZ[i+6];
2220 ny[i] = besttrack->fNy[i];
2221 nz[i] = besttrack->fNz[i];
2225 // calculate normalized chi2
2227 Float_t * chi2 = new Float_t[entries];
2228 Int_t * index = new Int_t[entries];
2229 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2230 for (Int_t itrack=0;itrack<entries;itrack++){
2231 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2233 track->fChi2MIP[0] = GetNormalizedChi2(track, mode);
2234 if (track->fChi2MIP[0]<kMaxChi2PerCluster[0])
2235 chi2[itrack] = track->fChi2MIP[0];
2237 delete array->RemoveAt(itrack);
2241 TMath::Sort(entries,chi2,index,kFALSE);
2242 besttrack = (AliITStrackMI*)array->At(index[0]);
2243 if (besttrack&&besttrack->fChi2MIP[0]<kMaxChi2PerCluster[0]){
2244 for (Int_t i=0;i<6;i++){
2245 if (besttrack->fClIndex[i]>0){
2246 erry[i] = besttrack->fSigmaY[i]; erry[i+6] = besttrack->fSigmaY[i+6];
2247 errz[i] = besttrack->fSigmaZ[i]; erry[i+6] = besttrack->fSigmaY[i+6];
2248 ny[i] = besttrack->fNy[i];
2249 nz[i] = besttrack->fNz[i];
2254 // calculate one more time with updated normalized errors
2255 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2256 for (Int_t itrack=0;itrack<entries;itrack++){
2257 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2259 track->fChi2MIP[0] = GetNormalizedChi2(track,mode);
2260 if (track->fChi2MIP[0]<kMaxChi2PerCluster[0])
2261 chi2[itrack] = track->fChi2MIP[0]-0*(track->GetNumberOfClusters()+track->fNDeadZone);
2263 delete array->RemoveAt(itrack);
2266 entries = array->GetEntriesFast();
2269 TObjArray * newarray = new TObjArray();
2270 TMath::Sort(entries,chi2,index,kFALSE);
2271 besttrack = (AliITStrackMI*)array->At(index[0]);
2274 for (Int_t i=0;i<6;i++){
2275 if (besttrack->fNz[i]>0&&besttrack->fNy[i]>0){
2276 erry[i] = besttrack->fSigmaY[i]; erry[i+6] = besttrack->fSigmaY[i+6];
2277 errz[i] = besttrack->fSigmaZ[i]; errz[i+6] = besttrack->fSigmaZ[i+6];
2278 ny[i] = besttrack->fNy[i];
2279 nz[i] = besttrack->fNz[i];
2282 besttrack->fChi2MIP[0] = GetNormalizedChi2(besttrack,mode);
2283 Float_t minchi2 = TMath::Min(besttrack->fChi2MIP[0]+5.+besttrack->fNUsed, double(kMaxChi2PerCluster[0]));
2284 Float_t minn = besttrack->GetNumberOfClusters()-3;
2286 for (Int_t i=0;i<entries;i++){
2287 AliITStrackMI * track = (AliITStrackMI*)array->At(index[i]);
2288 if (!track) continue;
2289 if (accepted>maxcut) break;
2290 track->fChi2MIP[0] = GetNormalizedChi2(track,mode);
2291 if (track->GetNumberOfClusters()<6 && (track->fChi2MIP[0]+track->fNUsed>minchi2)){
2292 delete array->RemoveAt(index[i]);
2295 if (track->fChi2MIP[0]+track->fNUsed<minchi2 && track->GetNumberOfClusters()>=minn){
2298 newarray->AddLast(array->RemoveAt(index[i]));
2299 for (Int_t i=0;i<6;i++){
2301 erry[i] = track->fSigmaY[i]; erry[i+6] = track->fSigmaY[i+6];
2302 errz[i] = track->fSigmaZ[i]; errz[i] = track->fSigmaZ[i+6];
2303 ny[i] = track->fNy[i];
2304 nz[i] = track->fNz[i];
2309 delete array->RemoveAt(index[i]);
2313 delete fTrackHypothesys.RemoveAt(esdindex);
2314 fTrackHypothesys.AddAt(newarray,esdindex);
2318 delete fTrackHypothesys.RemoveAt(esdindex);
2327 AliITStrackMI * AliITStrackerMI::GetBestHypothesys(Int_t esdindex, AliITStrackMI * original, Int_t checkmax)
2329 //-------------------------------------------------------------
2330 // try to find best hypothesy
2331 // currently - minimal chi2 of track+backpropagated track+matching to the tpc track
2332 //-------------------------------------------------------------
2333 if (fTrackHypothesys.GetEntriesFast()<=esdindex) return 0;
2334 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2335 if (!array) return 0;
2336 Int_t entries = array->GetEntriesFast();
2337 if (!entries) return 0;
2338 Float_t minchi2 = 100000;
2339 AliITStrackMI * besttrack=0;
2341 AliITStrackMI * backtrack = new AliITStrackMI(*original);
2342 AliITStrackMI * forwardtrack = new AliITStrackMI(*original);
2344 for (Int_t i=0;i<entries;i++){
2345 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
2346 if (!track) continue;
2347 track->fChi2MIP[1] = 1000000;
2348 track->fChi2MIP[2] = 1000000;
2349 track->fChi2MIP[3] = 1000000;
2352 backtrack = new(backtrack) AliITStrackMI(*track);
2353 backtrack->ResetCovariance();
2354 backtrack->ResetCovariance();
2355 backtrack->ResetClusters();
2356 Double_t x = original->GetX();
2357 if (!RefitAt(x,backtrack,track)) continue;
2358 track->fChi2MIP[1] = NormalizedChi2(backtrack,0);
2359 //for (Int_t i=2;i<6;i++){track->fDy[i]+=backtrack->fDy[i]; track->fDz[i]+=backtrack->fDz[i];}
2360 if (track->fChi2MIP[1]>kMaxChi2PerCluster[1]*6.) continue;
2361 track->fChi22 = GetMatchingChi2(backtrack,original);
2363 if ((track->fConstrain) && track->fChi22>90.) continue;
2364 if ((!track->fConstrain) && track->fChi22>30.) continue;
2365 if ( track->fChi22/track->GetNumberOfClusters()>11.) continue;
2368 if (!(track->fConstrain)&&track->fChi2MIP[1]>kMaxChi2PerCluster[1]) continue;
2371 for (Int_t i=0;i<6;i++){
2372 if (track->fClIndex[i]>0){
2373 Double_t dy1 = (track->fDy[i]/track->fSigmaY[i]);
2374 Double_t dz1 = (track->fDz[i]/track->fSigmaZ[i]);
2375 Double_t dy2 = (backtrack->fDy[i]/backtrack->fSigmaY[i]);
2376 Double_t dz2 = (backtrack->fDz[i]/backtrack->fSigmaZ[i]);
2377 if (TMath::Min(dy1*dy1+dz1*dz1,dy2*dy2+dz2*dz2)> kMaxChi2sR[i]) isOK =kFALSE;
2378 track->fDy[i+6] = backtrack->fDy[i];
2379 track->fDz[i+6] = backtrack->fDz[i];
2380 track->fSigmaY[i+6] = backtrack->fSigmaY[i];
2381 track->fSigmaZ[i+6] = backtrack->fSigmaZ[i];
2385 if (track->fClIndex[i-1]>0){
2386 Double_t dy2 = (backtrack->fDy[i-1]/backtrack->fSigmaY[i-1]);
2387 Double_t dz2 = (backtrack->fDz[i-1]/backtrack->fSigmaZ[i-1]);
2388 if (dy2*dy2+dz2*dz2> kMaxChi2sR[i]) isOK =kFALSE;
2397 //forward track - without constraint
2398 forwardtrack = new(forwardtrack) AliITStrackMI(*original);
2399 forwardtrack->ResetClusters();
2401 if (!RefitAt(x,forwardtrack,track)) continue;
2402 track->fChi2MIP[2] = NormalizedChi2(forwardtrack,0);
2403 if (track->fChi2MIP[2]>kMaxChi2PerCluster[2]*6.0) continue;
2404 if (!(track->fConstrain)&&track->fChi2MIP[2]>kMaxChi2PerCluster[2]) continue;
2406 track->fD[0] = forwardtrack->GetD(GetX(),GetY());
2407 track->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
2408 forwardtrack->fD[0] = track->fD[0];
2409 forwardtrack->fD[1] = track->fD[1];
2412 AliITSclusterV2* clist[6];
2413 track->fChi2MIP[4] = GetNumberOfSharedClusters(track,esdindex,list,clist);
2414 if ( (!track->fConstrain) && track->fChi2MIP[4]>1.0) continue;
2417 track->fChi2MIP[3] = GetInterpolatedChi2(forwardtrack,backtrack);
2418 if ( (track->fChi2MIP[3]>6.*kMaxChi2PerCluster[3])) continue;
2419 if ( (!track->fConstrain) && (track->fChi2MIP[3]>2*kMaxChi2PerCluster[3])) {
2420 track->fChi2MIP[3]=1000;
2423 Double_t chi2 = track->fChi2MIP[0]+track->fNUsed;
2425 for (Int_t ichi=0;ichi<5;ichi++){
2426 forwardtrack->fChi2MIP[ichi] = track->fChi2MIP[ichi];
2428 if (chi2 < minchi2){
2429 //besttrack = new AliITStrackMI(*forwardtrack);
2431 besttrack->SetLabel(track->GetLabel());
2432 besttrack->fFakeRatio = track->fFakeRatio;
2434 original->fD[0] = forwardtrack->GetD(GetX(),GetY());
2435 original->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
2439 delete forwardtrack;
2441 for (Int_t i=0;i<entries;i++){
2442 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
2443 if (!track) continue;
2444 if (accepted>checkmax || track->fChi2MIP[3]>kMaxChi2PerCluster[3]*6. ||
2445 (track->GetNumberOfClusters()<besttrack->GetNumberOfClusters()-1.)||
2446 track->fChi2MIP[0]>besttrack->fChi2MIP[0]+2.*besttrack->fNUsed+3.){
2447 delete array->RemoveAt(i);
2456 SortTrackHypothesys(esdindex,checkmax,1);
2457 array = (TObjArray*) fTrackHypothesys.At(esdindex);
2458 besttrack = (AliITStrackMI*)array->At(0);
2459 if (!besttrack) return 0;
2460 besttrack->fChi2MIP[8]=0;
2461 fBestTrackIndex[esdindex]=0;
2462 entries = array->GetEntriesFast();
2463 AliITStrackMI *longtrack =0;
2465 Float_t minn=besttrack->GetNumberOfClusters()+besttrack->fNDeadZone;
2466 for (Int_t itrack=entries-1;itrack>0;itrack--){
2467 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2468 if (!track->fConstrain) continue;
2469 if (track->GetNumberOfClusters()+track->fNDeadZone<minn) continue;
2470 if (track->fChi2MIP[0]-besttrack->fChi2MIP[0]>0.0) continue;
2471 if (track->fChi2MIP[0]>4.) continue;
2472 minn = track->GetNumberOfClusters()+track->fNDeadZone;
2475 //if (longtrack) besttrack=longtrack;
2478 AliITSclusterV2 * clist[6];
2479 Float_t shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
2480 if (besttrack->fConstrain&&besttrack->fChi2MIP[0]<kMaxChi2PerCluster[0]&&besttrack->fChi2MIP[1]<kMaxChi2PerCluster[1]
2481 &&besttrack->fChi2MIP[2]<kMaxChi2PerCluster[2]&&besttrack->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2482 //if (besttrack->fChi2MIP[0]<kMaxChi2PerCluster[0]&&besttrack->fChi2MIP[1]<kMaxChi2PerCluster[1]
2483 // &&besttrack->fChi2MIP[2]<kMaxChi2PerCluster[2]&&besttrack->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2484 RegisterClusterTracks(besttrack,esdindex);
2491 Int_t sharedtrack = GetOverlapTrack(besttrack, esdindex, nshared, list, overlist);
2492 if (sharedtrack>=0){
2494 besttrack = GetBest2Tracks(esdindex,sharedtrack,10,5.5);
2496 shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
2502 if (shared>2.5) return 0;
2503 if (shared>1.0) return besttrack;
2505 // don't sign clusters if not gold track
2506 Double_t deltad = besttrack->GetD(GetX(),GetY());
2507 Double_t deltaz = besttrack->GetZat(GetX()) - GetZ();
2508 Double_t deltaprim = TMath::Sqrt(deltad*deltad+deltaz*deltaz);
2509 if (deltaprim>0.1 && (fConstraint[fPass])) return besttrack;
2510 if (TMath::Abs(deltad)>0.1) return besttrack;
2511 if (TMath::Abs(deltaz)>0.1) return besttrack;
2512 if (besttrack->fChi2MIP[0]>4.) return besttrack;
2513 if (besttrack->fChi2MIP[1]>4.) return besttrack;
2514 if (besttrack->fChi2MIP[2]>4.) return besttrack;
2515 if (besttrack->fChi2MIP[3]>4.) return besttrack;
2516 if (fConstraint[fPass]){
2520 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
2521 for (Int_t i=0;i<6;i++){
2522 Int_t index = besttrack->fClIndex[i];
2523 if (index<=0) continue;
2524 Int_t ilayer = (index & 0xf0000000) >> 28;
2525 if (besttrack->fSigmaY[ilayer]<0.00000000001) continue;
2526 AliITSclusterV2 *c = (AliITSclusterV2*)GetCluster(index);
2528 if (ilayer>3&&c->GetNy()+c->GetNz()>6) continue;
2529 if ( (c->GetNy()+c->GetNz() )> ny[i]+nz[i]+0.7) continue; //shared track
2530 if ( c->GetNz()> nz[i]+0.7) continue; //shared track
2531 if ( ilayer>2&& besttrack->fNormQ[ilayer]/besttrack->fExpQ>1.5) continue;
2532 //if ( c->GetNy()> ny[i]+0.7) continue; //shared track
2534 Bool_t cansign = kTRUE;
2535 for (Int_t itrack=0;itrack<entries; itrack++){
2536 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
2537 if (!track) continue;
2538 if (track->fChi2MIP[0]>besttrack->fChi2MIP[0]+2.*shared+1.) break;
2539 if ( (track->fClIndex[ilayer]>0) && (track->fClIndex[ilayer]!=besttrack->fClIndex[ilayer])){
2545 if (TMath::Abs(besttrack->fDy[ilayer]/besttrack->fSigmaY[ilayer])>3.) continue;
2546 if (TMath::Abs(besttrack->fDz[ilayer]/besttrack->fSigmaZ[ilayer])>3.) continue;
2547 if (!c->IsUsed()) c->Use();
2556 void AliITStrackerMI::GetBestHypothesysMIP(TObjArray &itsTracks)
2559 // get "best" hypothesys
2560 //for (Int_t ilayer=0;ilayer<6;ilayer++) fgLayers[ilayer].ResetWeights();
2563 Int_t nentries = itsTracks.GetEntriesFast();
2564 for (Int_t i=0;i<nentries;i++){
2565 AliITStrackMI* track = (AliITStrackMI*)itsTracks.At(i);
2566 if (!track) continue;
2567 TObjArray * array = (TObjArray*) fTrackHypothesys.At(i);
2568 if (!array) continue;
2569 if (array->GetEntriesFast()<=0) continue;
2571 AliITStrackMI* longtrack=0;
2573 Float_t maxchi2=1000;
2574 for (Int_t j=0;j<array->GetEntriesFast();j++){
2575 AliITStrackMI* track = (AliITStrackMI*)array->At(j);
2576 if (!track) continue;
2577 if (track->GetNumberOfClusters()+track->fNDeadZone<minn) continue;
2578 if (track->GetNumberOfClusters()+track->fNDeadZone>minn) maxchi2 = track->fChi2MIP[0];
2579 if (track->fChi2MIP[0]>maxchi2) continue;
2580 minn= track->GetNumberOfClusters()+track->fNDeadZone;
2581 maxchi2 = track->fChi2MIP[0];
2585 AliITStrackMI * besttrack = (AliITStrackMI*)array->At(0);
2586 if (!longtrack) {longtrack = besttrack;}
2587 else besttrack= longtrack;
2590 AliITSclusterV2 * clist[6];
2591 Float_t shared = GetNumberOfSharedClusters(longtrack,i,list,clist);
2593 track->fNUsed = shared;
2594 track->fNSkipped = besttrack->fNSkipped;
2595 track->fChi2MIP[0] = besttrack->fChi2MIP[0];
2600 Int_t sharedtrack = GetOverlapTrack(longtrack, i, nshared, list, overlist);
2601 //if (sharedtrack==-1) sharedtrack=0;
2602 if (sharedtrack>=0){
2603 besttrack = GetBest2Tracks(i,sharedtrack,10,5.5);
2606 if (besttrack&&fConstraint[fPass])
2607 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
2608 //if (besttrack&&besttrack->fConstrain)
2609 // UpdateESDtrack(besttrack,AliESDtrack::kITSin);
2610 if (besttrack->fChi2MIP[0]+besttrack->fNUsed>1.5){
2611 if ( (TMath::Abs(besttrack->fD[0])>0.1) && fConstraint[fPass]) {
2612 track->fReconstructed= kFALSE;
2614 if ( (TMath::Abs(besttrack->fD[1])>0.1) && fConstraint[fPass]){
2615 track->fReconstructed= kFALSE;
2624 void AliITStrackerMI::CookLabel(AliITStrackMI *track,Float_t wrong) const {
2625 //--------------------------------------------------------------------
2626 //This function "cooks" a track label. If label<0, this track is fake.
2627 //--------------------------------------------------------------------
2630 if ( track->fESDtrack) tpcLabel = TMath::Abs(track->fESDtrack->GetTPCLabel());
2632 track->fChi2MIP[9]=0;
2634 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
2635 Int_t cindex = track->GetClusterIndex(i);
2636 Int_t l=(cindex & 0xf0000000) >> 28;
2637 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(cindex);
2639 for (Int_t ind=0;ind<3;ind++){
2641 if (cl->GetLabel(ind)==tpcLabel) isWrong=0;
2643 track->fChi2MIP[9]+=isWrong*(2<<l);
2646 track->fFakeRatio = double(nwrong)/double(track->GetNumberOfClusters());
2648 if (track->fFakeRatio>wrong) track->fLab = -tpcLabel;
2650 track->fLab = tpcLabel;
2657 void AliITStrackerMI::CookdEdx(AliITStrackMI* track)
2662 //AliITSclusterV2 * clist[6];
2663 // Int_t shared = GetNumberOfSharedClusters(track,index,list,clist);
2666 track->fChi2MIP[9]=0;
2667 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
2668 Int_t cindex = track->GetClusterIndex(i);
2669 Int_t l=(cindex & 0xf0000000) >> 28;
2670 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(cindex);
2671 Int_t lab = TMath::Abs(track->fESDtrack->GetTPCLabel());
2673 for (Int_t ind=0;ind<3;ind++){
2674 if (cl->GetLabel(ind)==lab) isWrong=0;
2676 track->fChi2MIP[9]+=isWrong*(2<<l);
2678 //if (l>3 && (cl->GetNy()>4) || (cl->GetNz()>4)) continue; //shared track
2679 //if (l>3&& !(cl->GetType()==1||cl->GetType()==10)) continue;
2680 //if (l<4&& !(cl->GetType()==1)) continue;
2681 dedx[accepted]= track->fdEdxSample[i];
2682 //dedx[accepted]= track->fNormQ[l];
2690 TMath::Sort(accepted,dedx,indexes,kFALSE);
2693 Double_t nl=low*accepted, nu =up*accepted;
2695 Float_t sumweight =0;
2696 for (Int_t i=0; i<accepted; i++) {
2698 if (i<nl+0.1) weight = TMath::Max(1.-(nl-i),0.);
2699 if (i>nu-1) weight = TMath::Max(nu-i,0.);
2700 sumamp+= dedx[indexes[i]]*weight;
2703 track->SetdEdx(sumamp/sumweight);
2707 void AliITStrackerMI::MakeCoeficients(Int_t ntracks){
2710 fCoeficients = new Float_t[ntracks*48];
2711 for (Int_t i=0;i<ntracks*48;i++) fCoeficients[i]=-1.;
2715 Double_t AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSclusterV2 *cluster,Int_t layer)
2721 Float_t theta = track->GetTgl();
2722 Float_t phi = track->GetSnp();
2723 phi = TMath::Sqrt(phi*phi/(1.-phi*phi));
2724 GetError(layer,cluster,theta,phi,track->fExpQ,erry,errz);
2725 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz);
2727 GetNTeor(layer,cluster, theta,phi,ny,nz);
2728 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
2730 chi2+=0.5*TMath::Min(delta/2,2.);
2731 chi2+=2.*cluster->GetDeltaProbability();
2734 track->fNy[layer] =ny;
2735 track->fNz[layer] =nz;
2736 track->fSigmaY[layer] = erry;
2737 track->fSigmaZ[layer] = errz;
2738 //track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt(1+theta*theta+phi*phi);
2739 track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt((1.+ track->fP3*track->fP3)/(1.- track->fP2*track->fP2));
2744 Int_t AliITStrackerMI::UpdateMI(AliITStrackMI* track, const AliITSclusterV2* cl,Double_t chi2,Int_t index) const
2749 Int_t layer = (index & 0xf0000000) >> 28;
2750 track->fClIndex[layer] = index;
2751 if ( (layer>1) &&track->fNormQ[layer]/track->fExpQ<0.5 ) {
2752 chi2+= (0.5-track->fNormQ[layer]/track->fExpQ)*10.;
2753 track->fdEdxMismatch+=(0.5-track->fNormQ[layer]/track->fExpQ)*10.;
2755 return track->UpdateMI(cl->GetY(),cl->GetZ(),track->fSigmaY[layer],track->fSigmaZ[layer],chi2,index);
2758 void AliITStrackerMI::GetNTeor(Int_t layer, const AliITSclusterV2* /*cl*/, Float_t theta, Float_t phi, Float_t &ny, Float_t &nz)
2764 ny = 1.+TMath::Abs(phi)*3.2;
2765 nz = 1.+TMath::Abs(theta)*0.34;
2769 ny = 1.+TMath::Abs(phi)*3.2;
2770 nz = 1.+TMath::Abs(theta)*0.28;
2775 ny = 2.02+TMath::Abs(phi)*1.95;
2776 nz = 2.02+TMath::Abs(phi)*2.35;
2779 ny = 6.6-2.7*TMath::Abs(phi);
2780 nz = 2.8-3.11*TMath::Abs(phi)+0.45*TMath::Abs(theta);
2785 Int_t AliITStrackerMI::GetError(Int_t layer, const AliITSclusterV2*cl, Float_t theta, Float_t phi,Float_t expQ, Float_t &erry, Float_t &errz)
2787 //calculate cluster position error
2790 GetNTeor(layer, cl,theta,phi,ny,nz);
2791 erry = TMath::Sqrt(cl->GetSigmaY2());
2792 errz = TMath::Sqrt(cl->GetSigmaZ2());
2797 if (TMath::Abs(ny-cl->GetNy())>0.6) {
2798 if (ny<cl->GetNy()){
2799 erry*=0.4+TMath::Abs(ny-cl->GetNy());
2800 errz*=0.4+TMath::Abs(ny-cl->GetNy());
2802 erry*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
2803 errz*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
2806 if (TMath::Abs(nz-cl->GetNz())>1.) {
2807 erry*=TMath::Abs(nz-cl->GetNz());
2808 errz*=TMath::Abs(nz-cl->GetNz());
2812 erry= TMath::Min(erry,float(0.005));
2813 errz= TMath::Min(errz,float(0.03));
2819 if (cl->GetNy()==100||cl->GetNz()==100){
2824 if (cl->GetNy()+cl->GetNz()>12){
2829 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
2830 Float_t chargematch = TMath::Max(double(normq/expQ),2.);
2832 if (cl->GetType()==1 || cl->GetType()==10 ){
2833 if (chargematch<1.0 || (cl->GetNy()+cl->GetNz()<nz+ny+0.5)){
2838 if (cl->GetNy()+cl->GetNz()<nz+ny+1.2){
2844 errz = TMath::Min(0.028*(chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.15);
2847 if (cl->GetType()==2 || cl->GetType()==11 ){
2848 erry = TMath::Min(0.0010*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.05);
2849 errz = TMath::Min(0.025*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.5);
2853 if (cl->GetType()>100 ){
2854 if ((chargematch+cl->GetNy()+cl->GetNz()-nz-ny<1.5)){
2859 if (cl->GetNy()+cl->GetNz()-nz-ny<1){
2865 errz = TMath::Min(0.05*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.4);
2866 erry = TMath::Min(0.003*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.05);
2869 Float_t diff = cl->GetNy()+cl->GetNz()-ny-nz;
2873 if (cl->GetType()==5||cl->GetType()==6||cl->GetType()==7||cl->GetType()==8){
2883 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
2884 Float_t chargematch = normq/expQ;
2886 Int_t cnz = cl->GetNz()%10;
2888 if (cl->GetType()==1){
2889 if (chargematch<1.25){
2890 erry = 0.0028*(1.+6./cl->GetQ()); // gold clusters
2893 erry = 0.003*chargematch;
2894 if (cl->GetNz()==3) erry*=1.5;
2896 if (chargematch<1.0){
2897 errz = 0.0011*(1.+6./cl->GetQ());
2900 errz = 0.002*(1+2*(chargematch-1.));
2904 errz*=1.4*(cnz-nz+0.5);
2907 if (cl->GetType()>1){
2909 erry = 0.00385*(1.+6./cl->GetQ()); // gold clusters
2910 errz = 0.0016*(1.+6./cl->GetQ());
2913 errz = 0.0014*(1+3*(chargematch-1.));
2914 erry = 0.003*(1+3*(chargematch-1.));
2918 errz*=1.4*(cnz-nz+0.5);
2922 if (TMath::Abs(cl->GetY())>2.5){
2923 factorz*=1+2*(TMath::Abs(cl->GetY())-2.5);
2925 if (TMath::Abs(cl->GetY())<1){
2926 factorz*=1.+0.5*TMath::Abs(TMath::Abs(cl->GetY())-1.);
2928 factorz= TMath::Min(factorz,float(4.));
2931 erry= TMath::Min(erry,float(0.05));
2932 errz= TMath::Min(errz,float(0.05));
2938 void AliITStrackerMI::SignDeltas( TObjArray *ClusterArray, Float_t vz)
2942 Int_t entries = ClusterArray->GetEntriesFast();
2943 if (entries<4) return;
2944 AliITSclusterV2* cluster = (AliITSclusterV2*)ClusterArray->At(0);
2945 Int_t layer = cluster->GetLayer();
2946 if (layer>1) return;
2948 Int_t ncandidates=0;
2949 Float_t r = (layer>0)? 7:4;
2951 for (Int_t i=0;i<entries;i++){
2952 AliITSclusterV2* cl0 = (AliITSclusterV2*)ClusterArray->At(i);
2953 Float_t nz = 1+TMath::Abs((cl0->GetZ()-vz)/r);
2954 if (cl0->GetNy()+cl0->GetNz()<=5+2*layer+nz) continue;
2955 index[ncandidates] = i; //candidate to belong to delta electron track
2957 if (cl0->GetNy()+cl0->GetNz()>9+2*layer+nz) {
2958 cl0->SetDeltaProbability(1);
2964 for (Int_t i=0;i<ncandidates;i++){
2965 AliITSclusterV2* cl0 = (AliITSclusterV2*)ClusterArray->At(index[i]);
2966 if (cl0->GetDeltaProbability()>0.8) continue;
2969 Float_t y[100],z[100],sumy,sumz,sumy2, sumyz, sumw;
2970 sumy=sumz=sumy2=sumyz=sumw=0.0;
2971 for (Int_t j=0;j<ncandidates;j++){
2973 AliITSclusterV2* cl1 = (AliITSclusterV2*)ClusterArray->At(index[j]);
2975 Float_t dz = cl0->GetZ()-cl1->GetZ();
2976 Float_t dy = cl0->GetY()-cl1->GetY();
2977 if (TMath::Sqrt(dz*dz+dy*dy)<0.2){
2978 Float_t weight = cl1->GetNy()+cl1->GetNz()-2;
2979 y[ncl] = cl1->GetY();
2980 z[ncl] = cl1->GetZ();
2981 sumy+= y[ncl]*weight;
2982 sumz+= z[ncl]*weight;
2983 sumy2+=y[ncl]*y[ncl]*weight;
2984 sumyz+=y[ncl]*z[ncl]*weight;
2989 if (ncl<4) continue;
2990 Float_t det = sumw*sumy2 - sumy*sumy;
2992 if (TMath::Abs(det)>0.01){
2993 Float_t z0 = (sumy2*sumz - sumy*sumyz)/det;
2994 Float_t k = (sumyz*sumw - sumy*sumz)/det;
2995 delta = TMath::Abs(cl0->GetZ()-(z0+k*cl0->GetY()));
2998 Float_t z0 = sumyz/sumy;
2999 delta = TMath::Abs(cl0->GetZ()-z0);
3002 cl0->SetDeltaProbability(1-20.*delta);
3008 void AliITStrackerMI::UpdateESDtrack(AliITStrackMI* track, ULong_t flags) const
3012 track->UpdateESDtrack(flags);
3013 AliITStrackMI * oldtrack = (AliITStrackMI*)(track->fESDtrack->GetITStrack());
3014 if (oldtrack) delete oldtrack;
3015 track->fESDtrack->SetITStrack(new AliITStrackMI(*track));
3025 void AliITStrackerMI::FindV0(AliESD *event)
3030 //fV0Array->Clean();
3031 AliHelix * helixes = new AliHelix[30000];
3032 TObjArray trackarray(30000);
3033 Float_t dist[30000];
3034 Float_t mindist[30000];
3035 AliESDV0MI *vertexarray = new AliESDV0MI[20000];
3036 AliV0vertex *oldvertexarray = new AliV0vertex[20000];
3037 AliESDV0MI *pvertex = &vertexarray[0];
3041 Int_t entries = fTrackHypothesys.GetEntriesFast();
3042 for (Int_t i=0;i<entries;i++){
3043 TObjArray * array = (TObjArray*)fTrackHypothesys.At(i);
3044 if (!array) continue;
3045 AliITStrackMI * track = (AliITStrackMI*)array->At(fBestTrackIndex[i]);
3047 dist[i] = TMath::Sqrt(track->fD[0]*track->fD[0]+track->fD[1]*track->fD[1]);
3048 Float_t pt1 = TMath::Abs(track->fP4*track->GetConvConst());
3049 mindist[i] = TMath::Min(0.02+0.03*pt1,0.15);
3050 if (mindist[i]<0.05) mindist[i]=0.05;
3051 trackarray.AddAt(track,i);
3052 new (&helixes[i]) AliHelix(*track);
3055 // Int_t multifound=0;
3057 AliESDV0MI tempvertex;
3058 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
3060 for (Int_t itrack0=0;itrack0<entries;itrack0++){
3061 AliITStrackMI * track0 = (AliITStrackMI*)trackarray.At(itrack0);
3062 if (!track0) continue;
3063 if (track0->fP4>0) continue;
3064 if (dist[itrack0]<mindist[itrack0]) continue;
3067 for (Int_t itrack1=0;itrack1<entries;itrack1++){
3068 AliITStrackMI * track1 = (AliITStrackMI*)trackarray.At(itrack1);
3069 if (!track1) continue;
3070 if (track1->fP4<0) continue;
3071 if (dist[itrack1]<mindist[itrack1]) continue;
3073 AliHelix *h1 = &helixes[itrack0];
3074 AliHelix *h2 = &helixes[itrack1];
3075 Double_t distance = TestV0(h1,h2,pvertex);
3076 if (distance>0.4) continue;
3078 if (distance>0.3*(dist[itrack1]+dist[itrack0])) continue;
3079 //if (distance>0.2*dist[itrack0]) continue;
3080 if (pvertex->GetRr()<0.3*(dist[itrack1]+dist[itrack0])) continue;
3081 if (pvertex->GetRr()>27) continue;
3082 pvertex->SetM(*track0);
3083 pvertex->SetP(*track1);
3084 pvertex->Update(primvertex);
3087 if (pvertex->GetPointAngle()<0.85) continue;
3090 pvertex->SetLab(0,track0->GetLabel());
3091 pvertex->SetLab(1,track1->GetLabel());
3092 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
3093 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
3096 pvertex->SetChi2After(0);
3097 pvertex->SetChi2Before(0);
3098 pvertex->SetNBefore(0);
3099 pvertex->SetNAfter(0);
3101 for (Int_t i=0;i<6;i++){
3102 Float_t radius = fgLayers[i].GetR();
3103 if (pvertex->GetRr()>radius+0.5){
3104 pvertex->SetNBefore(pvertex->GetNBefore()+2.);
3106 if (track0->fClIndex[i]<=0) {
3107 pvertex->SetChi2Before(pvertex->GetChi2Before()+9);
3109 Float_t chi2 = track0->fDy[i]*track0->fDy[i]/(track0->fSigmaY[i]*track0->fSigmaY[i])+
3110 track0->fDz[i]*track0->fDz[i]/(track0->fSigmaZ[i]*track0->fSigmaZ[i]);
3111 pvertex->SetChi2Before(pvertex->GetChi2Before()+chi2);
3114 if (track1->fClIndex[i]<=0) {
3115 pvertex->SetChi2Before(pvertex->GetChi2Before()+9);
3117 Float_t chi2 = track1->fDy[i]*track1->fDy[i]/(track1->fSigmaY[i]*track1->fSigmaY[i])+
3118 track1->fDz[i]*track1->fDz[i]/(track1->fSigmaZ[i]*track1->fSigmaZ[i]);
3119 pvertex->SetChi2Before(pvertex->GetChi2Before()+chi2);
3123 if (pvertex->GetRr()<radius-0.5){
3124 pvertex->SetNAfter(pvertex->GetNAfter()+2.);
3126 if (track0->fClIndex[i]<=0) {
3127 pvertex->SetChi2After(pvertex->GetChi2After()+9);
3129 Float_t chi2 = track0->fDy[i]*track0->fDy[i]/(track0->fSigmaY[i]*track0->fSigmaY[i])+
3130 track0->fDz[i]*track0->fDz[i]/(track0->fSigmaZ[i]*track0->fSigmaZ[i]);
3131 pvertex->SetChi2After(pvertex->GetChi2After()+chi2);
3134 if (track1->fClIndex[i]<=0) {
3135 pvertex->SetChi2After(pvertex->GetChi2After()+9);
3137 Float_t chi2 = track1->fDy[i]*track1->fDy[i]/(track1->fSigmaY[i]*track1->fSigmaY[i])+
3138 track1->fDz[i]*track1->fDz[i]/(track1->fSigmaZ[i]*track1->fSigmaZ[i]);
3139 pvertex->SetChi2After(pvertex->GetChi2After()+chi2);
3143 if (pvertex->GetNBefore()>2){
3144 if (pvertex->GetChi2Before()/pvertex->GetNBefore()<4.) continue; //have clusters before vetex
3146 distance = FindBestPair(itrack0,itrack1,pvertex);
3147 if (pvertex->GetPointAngle()<0.85) continue;
3149 if (distance>0.3) continue;
3150 // if (pvertex->GetDistSigma()*6>pvertex->GetRr()) continue;
3151 // if (pvertex->GetDistSigma()>0.4) continue;
3152 //if (pvertex->GetDistNorm()>5.5) continue;
3153 new (&oldvertexarray[vertexall]) AliV0vertex(*track0,*track1) ;
3156 pvertex = &vertexarray[vertexall];
3159 // printf("\n\n\nMultifound\t%d\n\n\n",multifound);
3161 // sort vertices according quality
3162 Float_t quality[10000];
3163 Int_t indexes[10000];
3164 Int_t trackvertices[30000];
3165 for (Int_t i=0;i<entries;i++) trackvertices[i]=0;
3166 for (Int_t i=0;i<vertexall;i++) quality[i] = 1.-vertexarray[i].GetPointAngle();
3167 TMath::Sort(vertexall,quality,indexes,kFALSE);
3169 for (Int_t i=0;i<vertexall;i++){
3170 pvertex= &vertexarray[indexes[i]];
3171 Int_t index0 = vertexarray[indexes[i]].GetIndex(0);
3172 Int_t index1 = vertexarray[indexes[i]].GetIndex(1);
3173 vertexarray[indexes[i]].SetOrder(2,i);
3174 vertexarray[indexes[i]].SetOrder(1,trackvertices[index1]);
3175 vertexarray[indexes[i]].SetOrder(0,trackvertices[index0]);
3176 if (trackvertices[index1]+trackvertices[index0]>2) continue;
3177 if (trackvertices[index1]+trackvertices[index0]>0) {
3178 // if (pvertex->GetPointAngle()<0.995) continue;
3180 trackvertices[index0]++;
3181 trackvertices[index1]++;
3183 // event->AddV0(&oldvertexarray[indexes[i]]);
3184 Int_t v0index = event->AddV0MI(&vertexarray[indexes[i]]);
3185 AliESDtrack * ptrack0 = event->GetTrack(vertexarray[indexes[i]].GetIndex(0));
3186 AliESDtrack * ptrack1 = event->GetTrack(vertexarray[indexes[i]].GetIndex(1));
3187 if (!ptrack0 || !ptrack1){
3188 printf("BBBBBBBUUUUUUUUUUGGGGGGGGGG\n");
3190 Int_t v0index0[3]={ptrack0->GetV0Index(0),ptrack0->GetV0Index(1),ptrack0->GetV0Index(2)};
3191 Int_t v0index1[3]={ptrack1->GetV0Index(0),ptrack1->GetV0Index(1),ptrack1->GetV0Index(2)};
3192 for (Int_t i=0;i<3;i++){
3193 if (v0index0[i]<0) {
3194 v0index0[i]=v0index;
3195 ptrack0->SetV0Indexes(v0index0);
3199 for (Int_t i=0;i<3;i++){
3200 if (v0index1[i]<0) {
3201 v0index1[i]=v0index;
3202 ptrack1->SetV0Indexes(v0index1);
3208 delete[] vertexarray;
3209 delete[] oldvertexarray;
3213 Double_t AliITStrackerMI::FindBestPair(Int_t esdtrack0, Int_t esdtrack1, AliESDV0MI *vertex)
3216 // try to find best pair from the tree of track hyp.
3218 TObjArray * array0 = (TObjArray*)fTrackHypothesys.At(esdtrack0);
3219 Int_t entries0 = array0->GetEntriesFast();
3220 TObjArray * array1 = (TObjArray*)fTrackHypothesys.At(esdtrack1);
3221 Int_t entries1 = array1->GetEntriesFast();
3222 // Float_t primvertex[3]={GetX(),GetY(),GetZ()};
3226 Double_t criticalradius = vertex->GetRr();
3228 AliITStrackMI * track0= (AliITStrackMI*)array0->At(fBestTrackIndex[esdtrack0]);
3229 AliITStrackMI * track1= (AliITStrackMI*)array1->At(fBestTrackIndex[esdtrack1]);
3231 // find the best tracks after decay point
3232 for (Int_t itrack0=0;itrack0<entries0;itrack0++){
3233 AliITStrackMI * track = (AliITStrackMI*)array0->At(itrack0);
3234 if (!track) continue;
3235 if (track->fX<criticalradius-1) continue;
3236 if (track->fX>criticalradius){
3242 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
3243 AliITStrackMI * track = (AliITStrackMI*)array1->At(itrack1);
3244 if (!track) continue;
3245 if (track->fX<criticalradius-1) continue;
3246 if (track->fX>criticalradius){
3251 //propagate to vertex
3252 Double_t alpha = TMath::ATan2(vertex->GetXr(1),vertex->GetXr(0));
3253 Double_t radius =TMath::Sqrt(vertex->GetXr(1)*vertex->GetXr(1)+vertex->GetXr(0)*vertex->GetXr(0));
3254 AliITStrackMI track0p = *track0;
3255 AliITStrackMI track1p = *track1;
3256 if (!track0p.Propagate(alpha,radius)) return 100000;
3257 if (!track1p.Propagate(alpha,radius)) return 100000;
3258 //track0p.Propagate(alpha,radius);
3259 //track1p.Propagate(alpha,radius);
3262 //vertex2->SetM(track0p);
3263 //vertex2->SetP(track1p);
3264 //vertex2->Update(primvertex);
3266 AliHelix h0(track0p);
3267 AliHelix h1(track1p);
3268 Double_t distance = TestV0(&h0,&h1,vertex);
3269 Float_t v[3]={GetX(),GetY(),GetZ()};
3270 // vertex->Update(v,track0->fMass, track1->fMass);
3271 vertex->SetM(*track0);
3272 vertex->SetP(*track1);
3274 Float_t sigma = TMath::Sqrt(track1p.GetSigmaY2()+track1p.GetSigmaZ2()+track0p.GetSigmaY2()+track0p.GetSigmaZ2());
3275 vertex->SetDistNorm(distance/sigma);
3276 vertex->SetDistSigma(sigma);
3282 Double_t AliITStrackerMI::TestV0(AliHelix *helix1, AliHelix *helix2, AliESDV0MI *vertex)
3285 // test the helixes for the distnce calculate vertex characteristic
3287 Float_t distance1,distance2;
3288 AliHelix & dhelix1 = *helix1;
3289 Double_t pp[3],xx[3];
3290 dhelix1.GetMomentum(0,pp,0);
3291 dhelix1.Evaluate(0,xx);
3292 AliHelix &mhelix = *helix2;
3294 //find intersection linear
3296 Double_t phase[2][2],radius[2];
3297 Int_t points = dhelix1.GetRPHIintersections(mhelix, phase, radius);
3298 Double_t delta1=10000,delta2=10000;
3301 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
3302 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
3303 dhelix1.LinearDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
3306 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
3307 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
3308 dhelix1.LinearDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
3310 distance1 = TMath::Min(delta1,delta2);
3311 vertex->SetDist1(TMath::Sqrt(distance1));
3313 //find intersection parabolic
3315 points = dhelix1.GetRPHIintersections(mhelix, phase, radius);
3316 delta1=10000,delta2=10000;
3319 dhelix1.ParabolicDCA(mhelix,phase[0][0],phase[0][1],radius[0],delta1);
3322 dhelix1.ParabolicDCA(mhelix,phase[1][0],phase[1][1],radius[1],delta2);
3325 distance2 = TMath::Min(delta1,delta2);
3326 vertex->SetDist2(TMath::Sqrt(distance2));
3330 dhelix1.Evaluate(phase[0][0],vertex->GetXrp());
3331 dhelix1.GetMomentum(phase[0][0],vertex->GetPPp());
3332 mhelix.GetMomentum(phase[0][1],vertex->GetPMp());
3333 dhelix1.GetAngle(phase[0][0],mhelix,phase[0][1],vertex->GetAnglep());
3334 vertex->SetRr(TMath::Sqrt(radius[0]));
3337 dhelix1.Evaluate(phase[1][0],vertex->GetXrp());
3338 dhelix1.GetMomentum(phase[1][0],vertex->GetPPp());
3339 mhelix.GetMomentum(phase[1][1],vertex->GetPMp());
3340 dhelix1.GetAngle(phase[1][0],mhelix,phase[1][1],vertex->GetAnglep());
3341 vertex->SetRr(TMath::Sqrt(radius[1]));
3346 return vertex->GetDist2();