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 **************************************************************************/
18 //-------------------------------------------------------------------------
19 // Implementation of the ITS tracker class
20 // It reads AliITSclusterV2 clusters and creates AliITStrackMI tracks
21 // and fills with them the ESD
22 // Origin: Marian Ivanov, CERN, Marian.Ivanov@cern.ch
23 // dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
25 //-------------------------------------------------------------------------
29 #include <TTreeStream.h>
33 #include "AliESDV0MI.h"
35 #include "AliITSclusterV2.h"
36 #include "AliITSgeom.h"
37 #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 //--------------------------------------------------------------------
51 AliITSgeom *g=(AliITSgeom*)geom;
54 for (i=1; i<kMaxLayer+1; i++) {
55 Int_t nlad=g->GetNladders(i);
56 Int_t ndet=g->GetNdetectors(i);
58 g->GetTrans(i,1,1,x,y,z);
59 Double_t r=TMath::Sqrt(x*x + y*y);
60 Double_t poff=TMath::ATan2(y,x);
63 g->GetTrans(i,1,2,x,y,z);
64 r += TMath::Sqrt(x*x + y*y);
65 g->GetTrans(i,2,1,x,y,z);
66 r += TMath::Sqrt(x*x + y*y);
67 g->GetTrans(i,2,2,x,y,z);
68 r += TMath::Sqrt(x*x + y*y);
71 new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet);
73 for (Int_t j=1; j<nlad+1; j++) {
74 for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors
75 Float_t x,y,zshift; g->GetTrans(i,j,k,x,y,zshift);
76 Double_t rot[9]; g->GetRotMatrix(i,j,k,rot);
78 Double_t phi=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
80 if (i==1) phi+=TMath::Pi();
81 Double_t cp=TMath::Cos(phi), sp=TMath::Sin(phi);
84 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
85 new(&det) AliITSdetector(r,phi);
94 fConstraint[0]=1; fConstraint[1]=0;
96 Double_t xyz[]={kXV,kYV,kZV}, ers[]={kSigmaXV,kSigmaYV,kSigmaZV};
99 for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=kLayersNotToSkip[i];
100 fLastLayerToTrackTo=kLastLayerToTrackTo;
101 for (Int_t i=0;i<100000;i++){
102 fBestTrackIndex[i]=0;
105 fDebugStreamer = new TTreeSRedirector("ITSdebug.root");
109 AliITStrackerMI::~AliITStrackerMI()
114 if (fCoeficients) delete []fCoeficients;
115 if (fDebugStreamer) {
116 //fDebugStreamer->Close();
117 delete fDebugStreamer;
121 void AliITStrackerMI::SetLayersNotToSkip(Int_t *l) {
122 //--------------------------------------------------------------------
123 //This function set masks of the layers which must be not skipped
124 //--------------------------------------------------------------------
125 for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=l[i];
128 Int_t AliITStrackerMI::LoadClusters(TTree *cTree) {
129 //--------------------------------------------------------------------
130 //This function loads ITS clusters
131 //--------------------------------------------------------------------
132 TBranch *branch=cTree->GetBranch("Clusters");
134 Error("LoadClusters"," can't get the branch !\n");
138 TClonesArray dummy("AliITSclusterV2",10000), *clusters=&dummy;
139 branch->SetAddress(&clusters);
143 for (Int_t i=0; i<kMaxLayer; i++) {
144 Int_t ndet=fgLayers[i].GetNdetectors();
145 Int_t jmax = j + fgLayers[i].GetNladders()*ndet;
146 for (; j<jmax; j++) {
147 if (!cTree->GetEvent(j)) continue;
148 Int_t ncl=clusters->GetEntriesFast();
149 SignDeltas(clusters,GetZ());
151 AliITSclusterV2 *c=(AliITSclusterV2*)clusters->UncheckedAt(ncl);
152 detector = c->GetDetectorIndex();
153 fgLayers[i].InsertCluster(new AliITSclusterV2(*c));
156 //add dead zone virtual "cluster"
158 for (Float_t ydead = 0; ydead < 1.31 ; ydead+=(i+1.)*0.018){
159 Int_t lab[4] = {0,0,0,detector};
160 Int_t info[3] = {0,0,0};
161 Float_t hit[5]={0,0,0.004/12.,0.001/12.,0};
162 if (i==0) hit[0] =ydead-0.4;
163 if (i==1) hit[0]=ydead-3.75;
165 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
166 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
168 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
169 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
171 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
172 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
174 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
175 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
177 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
178 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
180 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
181 fgLayers[i].InsertCluster(new AliITSclusterV2(lab, hit, info));
187 fgLayers[i].ResetRoad(); //road defined by the cluster density
188 fgLayers[i].SortClusters();
194 void AliITStrackerMI::UnloadClusters() {
195 //--------------------------------------------------------------------
196 //This function unloads ITS clusters
197 //--------------------------------------------------------------------
198 for (Int_t i=0; i<kMaxLayer; i++) fgLayers[i].ResetClusters();
201 static Int_t CorrectForDeadZoneMaterial(AliITStrackMI *t) {
202 //--------------------------------------------------------------------
203 // Correction for the material between the TPC and the ITS
204 // (should it belong to the TPC code ?)
205 //--------------------------------------------------------------------
206 Double_t riw=80., diw=0.0053, x0iw=30; // TPC inner wall ?
207 Double_t rcd=61., dcd=0.0053, x0cd=30; // TPC "central drum" ?
208 Double_t yr=12.8, dr=0.03; // rods ?
209 Double_t zm=0.2, dm=0.40; // membrane
210 //Double_t rr=52., dr=0.19, x0r=24., yyr=7.77; //rails
211 Double_t rs=50., ds=0.001; // something belonging to the ITS (screen ?)
213 if (t->GetX() > riw) {
214 if (!t->PropagateTo(riw,diw,x0iw)) return 1;
215 if (TMath::Abs(t->GetY())>yr) t->CorrectForMaterial(dr);
216 if (TMath::Abs(t->GetZ())<zm) t->CorrectForMaterial(dm);
217 if (!t->PropagateTo(rcd,dcd,x0cd)) return 1;
218 //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z);
219 //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,dr,x0r);
220 if (!t->PropagateTo(rs,ds)) return 1;
221 } else if (t->GetX() < rs) {
222 if (!t->PropagateTo(rs,-ds)) return 1;
223 //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z);
224 //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,-dr,x0r);
225 if (!t->PropagateTo(rcd,-dcd,x0cd)) return 1;
226 if (!t->PropagateTo(riw+0.001,-diw,x0iw)) return 1;
228 ::Error("CorrectForDeadZoneMaterial","track is already in the dead zone !");
235 Int_t AliITStrackerMI::Clusters2Tracks(AliESD *event) {
236 //--------------------------------------------------------------------
237 // This functions reconstructs ITS tracks
238 // The clusters must be already loaded !
239 //--------------------------------------------------------------------
240 TObjArray itsTracks(15000);
242 fEsd = event; // store pointer to the esd
243 {/* Read ESD tracks */
244 Int_t nentr=event->GetNumberOfTracks();
245 Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr);
247 AliESDtrack *esd=event->GetTrack(nentr);
249 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue;
250 if (esd->GetStatus()&AliESDtrack::kTPCout) continue;
251 if (esd->GetStatus()&AliESDtrack::kITSin) continue;
252 if (esd->GetKinkIndex(0)>0) continue; //kink daughter
255 t=new AliITStrackMI(*esd);
256 } catch (const Char_t *msg) {
257 //Warning("Clusters2Tracks",msg);
261 t->fD[0] = t->GetD(GetX(),GetY());
262 t->fD[1] = t->GetZat(GetX())-GetZ();
263 Double_t vdist = TMath::Sqrt(t->fD[0]*t->fD[0]+t->fD[1]*t->fD[1]);
264 if (t->GetMass()<0.13) t->SetMass(0.13957); // MI look to the esd - mass hypothesys !!!!!!!!!!!
266 t->fExpQ = TMath::Max(0.8*t->fESDtrack->GetTPCsignal(),30.);
268 if (esd->GetV0Index(0)>0 && t->fD[0]<30){
269 //track - can be V0 according to TPC
272 if (TMath::Abs(t->fD[0])>10) {
277 if (TMath::Abs(vdist)>20) {
281 if (TMath::Abs(1/t->Get1Pt())<0.120) {
286 if (CorrectForDeadZoneMaterial(t)!=0) {
287 //Warning("Clusters2Tracks",
288 // "failed to correct for the material in the dead zone !\n");
293 t->fReconstructed = kFALSE;
294 itsTracks.AddLast(t);
295 fOriginal.AddLast(t);
297 } /* End Read ESD tracks */
301 Int_t nentr=itsTracks.GetEntriesFast();
302 fTrackHypothesys.Expand(nentr);
303 fBestHypothesys.Expand(nentr);
304 MakeCoeficients(nentr);
306 for (fPass=0; fPass<2; fPass++) {
307 Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
308 for (Int_t i=0; i<nentr; i++) {
309 // cerr<<fPass<<" "<<i<<'\r';
310 fCurrentEsdTrack = i;
311 AliITStrackMI *t=(AliITStrackMI*)itsTracks.UncheckedAt(i);
312 if (t==0) continue; //this track has been already tracked
313 if (t->fReconstructed&&(t->fNUsed<1.5)) continue; //this track was already "succesfully" reconstructed
314 if ( (TMath::Abs(t->GetD(GetX(),GetY())) >3.) && fConstraint[fPass]) continue;
315 if ( (TMath::Abs(t->GetZat(GetX())-GetZ())>3.) && fConstraint[fPass]) continue;
317 Int_t tpcLabel=t->GetLabel(); //save the TPC track label
319 ResetTrackToFollow(*t);
321 FollowProlongationTree(t,i,fConstraint[fPass]);
323 SortTrackHypothesys(fCurrentEsdTrack,20,0); //MI change
325 AliITStrackMI * besttrack = GetBestHypothesys(fCurrentEsdTrack,t,15);
326 if (!besttrack) continue;
327 besttrack->SetLabel(tpcLabel);
328 // besttrack->CookdEdx();
330 besttrack->fFakeRatio=1.;
331 CookLabel(besttrack,0.); //For comparison only
332 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
335 if ( besttrack->GetNumberOfClusters()<6 && fConstraint[fPass]) {
338 if (besttrack->fChi2MIP[0]+besttrack->fNUsed>3.5) continue;
339 if ( (TMath::Abs(besttrack->fD[0]*besttrack->fD[0]+besttrack->fD[1]*besttrack->fD[1])>0.1) && fConstraint[fPass]) continue;
340 //delete itsTracks.RemoveAt(i);
342 if (fConstraint[fPass]&&(!besttrack->IsGoldPrimary())) continue; //to be tracked also without vertex constrain
345 t->fReconstructed = kTRUE;
348 GetBestHypothesysMIP(itsTracks);
351 //GetBestHypothesysMIP(itsTracks);
355 //GetBestHypothesysMIP(itsTracks);
359 Int_t entries = fTrackHypothesys.GetEntriesFast();
360 for (Int_t ientry=0;ientry<entries;ientry++){
361 TObjArray * array =(TObjArray*)fTrackHypothesys.UncheckedAt(ientry);
362 if (array) array->Delete();
363 delete fTrackHypothesys.RemoveAt(ientry);
366 fTrackHypothesys.Delete();
367 fBestHypothesys.Delete();
369 delete []fCoeficients;
371 Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk);
377 Int_t AliITStrackerMI::PropagateBack(AliESD *event) {
378 //--------------------------------------------------------------------
379 // This functions propagates reconstructed ITS tracks back
380 // The clusters must be loaded !
381 //--------------------------------------------------------------------
382 Int_t nentr=event->GetNumberOfTracks();
383 Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
386 for (Int_t i=0; i<nentr; i++) {
387 AliESDtrack *esd=event->GetTrack(i);
389 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
390 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
394 t=new AliITStrackMI(*esd);
395 } catch (const Char_t *msg) {
396 //Warning("PropagateBack",msg);
400 t->fExpQ = TMath::Max(0.8*t->fESDtrack->GetTPCsignal(),30.);
402 ResetTrackToFollow(*t);
404 // propagete to vertex [SR, GSI 17.02.2003]
405 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
406 if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {
407 if (fTrackToFollow.PropagateToVertex()) {
408 fTrackToFollow.StartTimeIntegral();
410 fTrackToFollow.PropagateTo(3.,-0.0028,65.19);
413 fTrackToFollow.ResetCovariance(); fTrackToFollow.ResetClusters();
414 if (RefitAt(49.,&fTrackToFollow,t)) {
415 if (CorrectForDeadZoneMaterial(&fTrackToFollow)!=0) {
416 //Warning("PropagateBack",
417 // "failed to correct for the material in the dead zone !\n");
421 fTrackToFollow.SetLabel(t->GetLabel());
422 //fTrackToFollow.CookdEdx();
423 CookLabel(&fTrackToFollow,0.); //For comparison only
424 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
425 //UseClusters(&fTrackToFollow);
431 Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk);
436 Int_t AliITStrackerMI::RefitInward(AliESD *event) {
437 //--------------------------------------------------------------------
438 // This functions refits ITS tracks using the
439 // "inward propagated" TPC tracks
440 // The clusters must be loaded !
441 //--------------------------------------------------------------------
442 Int_t nentr=event->GetNumberOfTracks();
443 Info("RefitInward", "Number of ESD tracks: %d\n", nentr);
446 for (Int_t i=0; i<nentr; i++) {
447 AliESDtrack *esd=event->GetTrack(i);
449 if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
450 if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
451 if (esd->GetStatus()&AliESDtrack::kTPCout)
452 if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
456 t=new AliITStrackMI(*esd);
457 } catch (const Char_t *msg) {
458 //Warning("RefitInward",msg);
462 t->fExpQ = TMath::Max(0.8*t->fESDtrack->GetTPCsignal(),30.);
463 if (CorrectForDeadZoneMaterial(t)!=0) {
464 //Warning("RefitInward",
465 // "failed to correct for the material in the dead zone !\n");
470 ResetTrackToFollow(*t);
471 fTrackToFollow.ResetClusters();
473 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
474 fTrackToFollow.ResetCovariance();
477 if (RefitAt(3.7, &fTrackToFollow, t)) {
478 fTrackToFollow.SetLabel(t->GetLabel());
479 // fTrackToFollow.CookdEdx();
480 CookdEdx(&fTrackToFollow);
482 CookLabel(&fTrackToFollow,0.0); //For comparison only
484 if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {//The beam pipe
485 Double_t a=fTrackToFollow.GetAlpha();
486 Double_t cs=TMath::Cos(a),sn=TMath::Sin(a);
487 Double_t xv= GetX()*cs + GetY()*sn;
488 Double_t yv=-GetX()*sn + GetY()*cs;
490 Double_t c=fTrackToFollow.GetC(), snp=fTrackToFollow.GetSnp();
491 Double_t x=fTrackToFollow.GetX(), y=fTrackToFollow.GetY();
492 Double_t tgfv=-(c*(x-xv)-snp)/(c*(y-yv) + TMath::Sqrt(1.-snp*snp));
493 Double_t fv=TMath::ATan(tgfv);
495 cs=TMath::Cos(fv); sn=TMath::Sin(fv);
497 yv=-xv*sn + yv*cs; xv=x;
499 if (fTrackToFollow.Propagate(fv+a,xv)) {
500 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit);
501 //UseClusters(&fTrackToFollow);
503 AliITSclusterV2 c; c.SetY(yv); c.SetZ(GetZ());
504 c.SetSigmaY2(GetSigmaY()*GetSigmaY());
505 c.SetSigmaZ2(GetSigmaZ()*GetSigmaZ());
506 Double_t chi2=fTrackToFollow.GetPredictedChi2(&c);
507 //Double_t chi2=GetPredictedChi2MI(&fTrackToFollow,&c,fI);
509 if (fTrackToFollow.Update(&c,-chi2,0))
510 //if (UpdateMI(&fTrackToFollow,&c,-chi2,0))
511 fTrackToFollow.SetConstrainedESDtrack(chi2);
520 Info("RefitInward","Number of refitted tracks: %d\n",ntrk);
525 AliCluster *AliITStrackerMI::GetCluster(Int_t index) const {
526 //--------------------------------------------------------------------
527 // Return pointer to a given cluster
528 //--------------------------------------------------------------------
529 Int_t l=(index & 0xf0000000) >> 28;
530 Int_t c=(index & 0x0fffffff) >> 00;
531 return fgLayers[l].GetCluster(c);
535 void AliITStrackerMI::FollowProlongationTree(AliITStrackMI * otrack, Int_t esdindex, Bool_t constrain)
537 //--------------------------------------------------------------------
538 // Follow prolongation tree
539 //--------------------------------------------------------------------
541 AliESDtrack * esd = otrack->fESDtrack;
542 if (esd->GetV0Index(0)>0){
544 // TEMPORARY SOLLUTION: map V0 indexes to point to proper track
545 // mapping of esd track is different as its track in Containers
546 // Need something more stable
547 // Indexes are set back againg to the ESD track indexes in UpdateTPCV0
548 for (Int_t i=0;i<3;i++){
549 Int_t index = esd->GetV0Index(i);
551 AliESDV0MI * vertex = fEsd->GetV0MI(index);
552 if (vertex->GetStatus()<0) continue; // rejected V0
554 if (esd->GetSign()>0) {
555 vertex->SetIndex(0,esdindex);
558 vertex->SetIndex(1,esdindex);
562 TObjArray *bestarray = (TObjArray*)fBestHypothesys.At(esdindex);
564 bestarray = new TObjArray(5);
565 fBestHypothesys.AddAt(bestarray,esdindex);
569 //setup tree of the prolongations
571 static AliITStrackMI tracks[7][100];
572 AliITStrackMI *currenttrack;
573 static AliITStrackMI currenttrack1;
574 static AliITStrackMI currenttrack2;
575 static AliITStrackMI backuptrack;
577 Int_t nindexes[7][100];
578 Float_t normalizedchi2[100];
579 for (Int_t ilayer=0;ilayer<6;ilayer++) ntracks[ilayer]=0;
581 new (&(tracks[6][0])) AliITStrackMI(*otrack);
583 for (Int_t i=0;i<7;i++) nindexes[i][0]=0;
586 // follow prolongations
587 for (Int_t ilayer=5;ilayer>=0;ilayer--){
589 AliITSlayer &layer=fgLayers[ilayer];
590 Double_t r=layer.GetR();
596 for (Int_t itrack =0;itrack<ntracks[ilayer+1];itrack++){
598 if (ntracks[ilayer]>=100) break;
599 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].fNSkipped>0) nskipped++;
600 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].fNUsed>2.) nused++;
601 if (ntracks[ilayer]>15+ilayer){
602 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].fNSkipped>0 && nskipped>4+ilayer) continue;
603 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].fNUsed>2. && nused>3) continue;
606 new(¤ttrack1) AliITStrackMI(tracks[ilayer+1][nindexes[ilayer+1][itrack]]);
607 if (ilayer==3 || ilayer==1) {
608 Double_t rs=0.5*(fgLayers[ilayer+1].GetR() + r);
609 Double_t d=0.0034, x0=38.6;
610 if (ilayer==1) {rs=9.; d=0.0097; x0=42;}
611 if (!currenttrack1.PropagateTo(rs,d,x0)) {
616 //find intersection with layer
618 if (!currenttrack1.GetGlobalXYZat(r,x,y,z)) {
621 Double_t phi=TMath::ATan2(y,x);
622 Int_t idet=layer.FindDetectorIndex(phi,z);
626 //propagate to the intersection
627 const AliITSdetector &det=layer.GetDetector(idet);
629 new(¤ttrack2) AliITStrackMI(currenttrack1);
630 if (!currenttrack1.Propagate(phi,det.GetR())) {
633 currenttrack2.Propagate(phi,det.GetR()); //
634 currenttrack1.SetDetectorIndex(idet);
635 currenttrack2.SetDetectorIndex(idet);
639 Double_t dz=7.5*TMath::Sqrt(currenttrack1.GetSigmaZ2() + 16.*kSigmaZ2[ilayer]);
640 Double_t dy=7.5*TMath::Sqrt(currenttrack1.GetSigmaY2() + 16.*kSigmaY2[ilayer]);
642 Bool_t isBoundary=kFALSE;
643 if (currenttrack1.GetY()-dy< det.GetYmin()+0.2) isBoundary = kTRUE;
644 if (currenttrack1.GetY()+dy> det.GetYmax()-0.2) isBoundary = kTRUE;
645 if (currenttrack1.GetZ()-dz< det.GetZmin()+0.2) isBoundary = kTRUE;
646 if (currenttrack1.GetZ()+dz> det.GetZmax()-0.2) isBoundary = kTRUE;
648 if (isBoundary){ // track at boundary between detectors
649 Float_t maxtgl = TMath::Abs(currenttrack1.GetTgl());
650 if (maxtgl>1) maxtgl=1;
651 dz = TMath::Sqrt(dz*dz+0.25*maxtgl*maxtgl);
653 Float_t maxsnp = TMath::Abs(currenttrack1.GetSnp());
654 if (maxsnp>0.95) continue;
655 //if (maxsnp>0.5) maxsnp=0.5;
656 dy=TMath::Sqrt(dy*dy+0.25*maxsnp*maxsnp);
659 Double_t zmin=currenttrack1.GetZ() - dz;
660 Double_t zmax=currenttrack1.GetZ() + dz;
661 Double_t ymin=currenttrack1.GetY() + r*phi - dy;
662 Double_t ymax=currenttrack1.GetY() + r*phi + dy;
663 layer.SelectClusters(zmin,zmax,ymin,ymax);
665 // loop over all possible prolongations
667 Double_t msz=1./((currenttrack1.GetSigmaZ2() + 16.*kSigmaZ2[ilayer]));
668 Double_t msy=1./((currenttrack1.GetSigmaY2() + 16.*kSigmaY2[ilayer]));
676 const AliITSclusterV2 *c=0; Int_t ci=-1;
677 Double_t chi2=12345.;
679 currenttrack = ¤ttrack1;
680 while ((c=layer.GetNextCluster(ci))!=0) {
681 if (ntracks[ilayer]>95) break; //space for skipped clusters
682 Bool_t change =kFALSE;
683 if (c->GetQ()==0 && (deadzone==1)) continue;
684 Int_t idet=c->GetDetectorIndex();
685 if (currenttrack->GetDetectorIndex()!=idet) {
686 const AliITSdetector &det=layer.GetDetector(idet);
688 if (!currenttrack2.GetProlongationFast(det.GetPhi(),det.GetR(),y,z)) continue;
689 Float_t pz = (z - c->GetZ()) , py=(y - c->GetY());
690 if (pz*pz*msz+py*py*msy>1.) continue;
692 new (&backuptrack) AliITStrackMI(currenttrack2);
694 currenttrack =¤ttrack2;
695 if (!currenttrack->Propagate(det.GetPhi(),det.GetR())) {
696 new (currenttrack) AliITStrackMI(backuptrack);
700 currenttrack->SetDetectorIndex(idet);
703 Float_t pz = (currenttrack->GetZ() - c->GetZ()) , py=(currenttrack->GetY() - c->GetY());
704 if (pz*pz*msz+py*py*msy>1.) continue;
707 chi2=GetPredictedChi2MI(currenttrack,c,ilayer);
708 if (chi2<kMaxChi2s[ilayer]){
709 if (c->GetQ()==0) deadzone=1; // take dead zone only once
710 if (ntracks[ilayer]>=100) continue;
711 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
712 updatetrack->fClIndex[ilayer]=0;
714 new (¤ttrack2) AliITStrackMI(backuptrack);
717 if (!UpdateMI(updatetrack,c,chi2,(ilayer<<28)+ci)) continue;
718 updatetrack->SetSampledEdx(c->GetQ(),updatetrack->GetNumberOfClusters()-1); //b.b.
721 updatetrack->fNDeadZone++;
722 updatetrack->fDeadZoneProbability=GetDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2()));
725 updatetrack->fNUsed++;
728 Double_t d=layer.GetThickness(updatetrack->GetY(),updatetrack->GetZ(),x0);
729 updatetrack->CorrectForMaterial(d,x0);
731 updatetrack->fConstrain = constrain;
733 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
734 Double_t xyz[]={GetX(),GetY(),GetZ()};
735 Double_t ptfactor = 1;
736 Double_t ers[]={GetSigmaX()*ptfactor,GetSigmaY()*ptfactor,GetSigmaZ()};
737 Bool_t isPrim = kTRUE;
739 updatetrack->fD[0] = updatetrack->GetD(GetX(),GetY());
740 updatetrack->fD[1] = updatetrack->GetZat(GetX())-GetZ();
741 if ( TMath::Abs(updatetrack->fD[0]/(1.+ilayer))>0.4 || TMath::Abs(updatetrack->fD[1]/(1.+ilayer))>0.4) isPrim=kFALSE;
743 if (isPrim) updatetrack->Improve(d,xyz,ers);
744 } //apply vertex constrain
746 } // create new hypothesy
747 } // loop over possible cluster prolongation
748 // if (constrain&&itrack<2&¤ttrack1.fNSkipped==0 && deadzone==0){
749 if (constrain&&itrack<2&¤ttrack1.fNSkipped==0 && deadzone==0&&ntracks[ilayer]<100){
750 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
751 vtrack->fClIndex[ilayer]=0;
753 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
754 Double_t xyz[]={GetX(),GetY(),GetZ()};
755 Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
756 vtrack->Improve(d,xyz,ers);
761 if (constrain&&itrack<1&&TMath::Abs(currenttrack1.fP3)>1.1){ //big theta -- for low mult. runs
762 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
763 vtrack->fClIndex[ilayer]=0;
765 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
766 Double_t xyz[]={GetX(),GetY(),GetZ()};
767 Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
768 vtrack->Improve(d,xyz,ers);
769 vtrack->fNDeadZone++;
774 } //loop over track candidates
780 for (Int_t itrack=0;itrack<ntracks[ilayer];itrack++){
781 normalizedchi2[itrack] = NormalizedChi2(&tracks[ilayer][itrack],ilayer);
782 if ( normalizedchi2[itrack]<3+0.5*ilayer) golds++;
783 if (ilayer>4) accepted++;
785 if ( constrain && normalizedchi2[itrack]<kMaxNormChi2C[ilayer]+1) accepted++;
786 if (!constrain && normalizedchi2[itrack]<kMaxNormChi2NonC[ilayer]+1) accepted++;
789 TMath::Sort(ntracks[ilayer],normalizedchi2,nindexes[ilayer],kFALSE);
790 ntracks[ilayer] = TMath::Min(accepted,7+2*ilayer);
791 if (ntracks[ilayer]<golds+2+ilayer) ntracks[ilayer]=TMath::Min(golds+2+ilayer,accepted);
792 if (ntracks[ilayer]>90) ntracks[ilayer]=90;
794 //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]);
795 Int_t max = constrain? 20: 5;
797 for (Int_t i=0;i<TMath::Min(max,ntracks[0]);i++) {
798 AliITStrackMI & track= tracks[0][nindexes[0][i]];
799 if (track.GetNumberOfClusters()<2) continue;
800 if (!constrain&&track.fNormChi2[0]>7.)continue;
801 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
803 for (Int_t i=0;i<TMath::Min(2,ntracks[1]);i++) {
804 AliITStrackMI & track= tracks[1][nindexes[1][i]];
805 if (track.GetNumberOfClusters()<4) continue;
806 if (!constrain&&track.fNormChi2[1]>7.)continue;
807 if (constrain) track.fNSkipped+=1;
809 track.fD[0] = track.GetD(GetX(),GetY());
810 track.fNSkipped+=4./(4.+8.*TMath::Abs(track.fD[0]));
811 if (track.fN+track.fNDeadZone+track.fNSkipped>6) {
812 track.fNSkipped = 6-track.fN+track.fNDeadZone;
815 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
820 for (Int_t i=0;i<TMath::Min(2,ntracks[2]);i++) {
821 AliITStrackMI & track= tracks[2][nindexes[2][i]];
822 if (track.GetNumberOfClusters()<3) continue;
823 if (!constrain&&track.fNormChi2[2]>7.)continue;
824 if (constrain) track.fNSkipped+=2;
826 track.fD[0] = track.GetD(GetX(),GetY());
827 track.fNSkipped+= 7./(7.+8.*TMath::Abs(track.fD[0]));
828 if (track.fN+track.fNDeadZone+track.fNSkipped>6) {
829 track.fNSkipped = 6-track.fN+track.fNDeadZone;
832 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
838 // register best tracks - important for V0 finder
840 for (Int_t ilayer=0;ilayer<5;ilayer++){
841 if (ntracks[ilayer]==0) continue;
842 AliITStrackMI & track= tracks[ilayer][nindexes[ilayer][0]];
843 if (track.GetNumberOfClusters()<1) continue;
845 bestarray->AddAt(new AliITStrackMI(track),ilayer);
849 // update TPC V0 information
851 if (otrack->fESDtrack->GetV0Index(0)>0){
852 Float_t fprimvertex[3]={GetX(),GetY(),GetZ()};
853 for (Int_t i=0;i<3;i++){
854 Int_t index = otrack->fESDtrack->GetV0Index(i);
856 AliESDV0MI * vertex = fEsd->GetV0MI(index);
857 if (vertex->GetStatus()<0) continue; // rejected V0
860 vertex->SetIndex(0,esdindex);
863 vertex->SetIndex(1,esdindex);
865 //find nearest layer with track info
866 Int_t nearestold = GetNearestLayer(vertex->GetXrp());
867 Int_t nearest = nearestold;
868 for (Int_t ilayer =nearest;ilayer<8;ilayer++){
869 if (ntracks[nearest]==0){
874 AliITStrackMI & track= tracks[nearest][nindexes[nearest][0]];
875 if (nearestold<5&&nearest<5){
876 Bool_t accept = track.fNormChi2[nearest]<10;
880 vertex->Update(fprimvertex);
881 // vertex->SetIndex(0,track.fESDtrack->GetID());
882 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
885 vertex->Update(fprimvertex);
886 //vertex->SetIndex(1,track.fESDtrack->GetID());
887 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
889 vertex->SetStatus(vertex->GetStatus()+1);
891 // vertex->SetStatus(-2); // reject V0 - not enough clusters
894 // if (nearestold>3){
895 // Int_t indexlayer = (ntracks[0]>0)? 0:1;
896 // if (ntracks[indexlayer]>0){
897 // AliITStrackMI & track= tracks[indexlayer][nindexes[indexlayer][0]];
898 // if (track.GetNumberOfClusters()>4&&track.fNormChi2[indexlayer]<4){
899 // vertex->SetStatus(-1); // reject V0 - clusters before
908 AliITStrackerMI::AliITSlayer & AliITStrackerMI::GetLayer(Int_t layer) const
910 //--------------------------------------------------------------------
913 return fgLayers[layer];
915 AliITStrackerMI::AliITSlayer::AliITSlayer() {
916 //--------------------------------------------------------------------
917 //default AliITSlayer constructor
918 //--------------------------------------------------------------------
923 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
925 fClusterTracks[0][i]=-1;
926 fClusterTracks[1][i]=-1;
927 fClusterTracks[2][i]=-1;
928 fClusterTracks[3][i]=-1;
932 AliITStrackerMI::AliITSlayer::
933 AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd) {
934 //--------------------------------------------------------------------
935 //main AliITSlayer constructor
936 //--------------------------------------------------------------------
937 fR=r; fPhiOffset=p; fZOffset=z;
938 fNladders=nl; fNdetectors=nd;
939 fDetectors=new AliITSdetector[fNladders*fNdetectors];
944 fRoad=2*fR*TMath::Sqrt(3.14/1.);//assuming that there's only one cluster
947 AliITStrackerMI::AliITSlayer::~AliITSlayer() {
948 //--------------------------------------------------------------------
949 // AliITSlayer destructor
950 //--------------------------------------------------------------------
952 for (Int_t i=0; i<fN; i++) delete fClusters[i];
953 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
955 fClusterTracks[0][i]=-1;
956 fClusterTracks[1][i]=-1;
957 fClusterTracks[2][i]=-1;
958 fClusterTracks[3][i]=-1;
962 void AliITStrackerMI::AliITSlayer::ResetClusters() {
963 //--------------------------------------------------------------------
964 // This function removes loaded clusters
965 //--------------------------------------------------------------------
966 for (Int_t i=0; i<fN; i++) delete fClusters[i];
967 for (Int_t i=0; i<kMaxClusterPerLayer;i++){
969 fClusterTracks[0][i]=-1;
970 fClusterTracks[1][i]=-1;
971 fClusterTracks[2][i]=-1;
972 fClusterTracks[3][i]=-1;
979 void AliITStrackerMI::AliITSlayer::ResetWeights() {
980 //--------------------------------------------------------------------
981 // This function reset weights of the clusters
982 //--------------------------------------------------------------------
983 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
985 fClusterTracks[0][i]=-1;
986 fClusterTracks[1][i]=-1;
987 fClusterTracks[2][i]=-1;
988 fClusterTracks[3][i]=-1;
990 for (Int_t i=0; i<fN;i++) {
991 AliITSclusterV2 * cl = (AliITSclusterV2*)GetCluster(i);
992 if (cl&&cl->IsUsed()) cl->Use();
997 void AliITStrackerMI::AliITSlayer::ResetRoad() {
998 //--------------------------------------------------------------------
999 // This function calculates the road defined by the cluster density
1000 //--------------------------------------------------------------------
1002 for (Int_t i=0; i<fN; i++) {
1003 if (TMath::Abs(fClusters[i]->GetZ())<fR) n++;
1005 //if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n);
1006 if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n);
1010 Int_t AliITStrackerMI::AliITSlayer::InsertCluster(AliITSclusterV2 *c) {
1011 //--------------------------------------------------------------------
1012 //This function adds a cluster to this layer
1013 //--------------------------------------------------------------------
1014 if (fN==kMaxClusterPerLayer) {
1015 ::Error("InsertCluster","Too many clusters !\n");
1021 AliITSdetector &det=GetDetector(c->GetDetectorIndex());
1022 if (c->GetY()<det.GetYmin()) det.SetYmin(c->GetY());
1023 if (c->GetY()>det.GetYmax()) det.SetYmax(c->GetY());
1024 if (c->GetZ()<det.GetZmin()) det.SetZmin(c->GetZ());
1025 if (c->GetZ()>det.GetZmax()) det.SetZmax(c->GetZ());
1030 void AliITStrackerMI::AliITSlayer::SortClusters()
1035 AliITSclusterV2 **clusters = new AliITSclusterV2*[fN];
1036 Float_t *z = new Float_t[fN];
1037 Int_t * index = new Int_t[fN];
1039 for (Int_t i=0;i<fN;i++){
1040 z[i] = fClusters[i]->GetZ();
1042 TMath::Sort(fN,z,index,kFALSE);
1043 for (Int_t i=0;i<fN;i++){
1044 clusters[i] = fClusters[index[i]];
1047 for (Int_t i=0;i<fN;i++){
1048 fClusters[i] = clusters[i];
1049 fZ[i] = fClusters[i]->GetZ();
1050 AliITSdetector &det=GetDetector(fClusters[i]->GetDetectorIndex());
1051 Double_t y=fR*det.GetPhi() + fClusters[i]->GetY();
1052 if (y>2.*fR*TMath::Pi()) y -= 2.*fR*TMath::Pi();
1062 for (Int_t i=0;i<fN;i++){
1063 if (fY[i]<fYB[0]) fYB[0]=fY[i];
1064 if (fY[i]>fYB[1]) fYB[1]=fY[i];
1065 fClusterIndex[i] = i;
1069 fDy5 = (fYB[1]-fYB[0])/5.;
1070 fDy10 = (fYB[1]-fYB[0])/10.;
1071 fDy20 = (fYB[1]-fYB[0])/20.;
1072 for (Int_t i=0;i<6;i++) fN5[i] =0;
1073 for (Int_t i=0;i<11;i++) fN10[i]=0;
1074 for (Int_t i=0;i<21;i++) fN20[i]=0;
1076 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;}
1077 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;}
1078 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;}
1081 for (Int_t i=0;i<fN;i++)
1082 for (Int_t irot=-1;irot<=1;irot++){
1083 Float_t curY = fY[i]+irot*TMath::TwoPi()*fR;
1085 for (Int_t slice=0; slice<6;slice++){
1086 if (fBy5[slice][0]<curY && curY<fBy5[slice][1]&&fN5[slice]<kMaxClusterPerLayer5){
1087 fClusters5[slice][fN5[slice]] = fClusters[i];
1088 fY5[slice][fN5[slice]] = curY;
1089 fZ5[slice][fN5[slice]] = fZ[i];
1090 fClusterIndex5[slice][fN5[slice]]=i;
1095 for (Int_t slice=0; slice<11;slice++){
1096 if (fBy10[slice][0]<curY && curY<fBy10[slice][1]&&fN10[slice]<kMaxClusterPerLayer10){
1097 fClusters10[slice][fN10[slice]] = fClusters[i];
1098 fY10[slice][fN10[slice]] = curY;
1099 fZ10[slice][fN10[slice]] = fZ[i];
1100 fClusterIndex10[slice][fN10[slice]]=i;
1105 for (Int_t slice=0; slice<21;slice++){
1106 if (fBy20[slice][0]<curY && curY<fBy20[slice][1]&&fN20[slice]<kMaxClusterPerLayer20){
1107 fClusters20[slice][fN20[slice]] = fClusters[i];
1108 fY20[slice][fN20[slice]] = curY;
1109 fZ20[slice][fN20[slice]] = fZ[i];
1110 fClusterIndex20[slice][fN20[slice]]=i;
1117 // consistency check
1119 for (Int_t i=0;i<fN-1;i++){
1125 for (Int_t slice=0;slice<21;slice++)
1126 for (Int_t i=0;i<fN20[slice]-1;i++){
1127 if (fZ20[slice][i]>fZ20[slice][i+1]){
1136 Int_t AliITStrackerMI::AliITSlayer::FindClusterIndex(Float_t z) const {
1137 //--------------------------------------------------------------------
1138 // This function returns the index of the nearest cluster
1139 //--------------------------------------------------------------------
1142 if (fCurrentSlice<0) {
1151 if (ncl==0) return 0;
1152 Int_t b=0, e=ncl-1, m=(b+e)/2;
1153 for (; b<e; m=(b+e)/2) {
1154 // if (z > fClusters[m]->GetZ()) b=m+1;
1155 if (z > zcl[m]) b=m+1;
1162 void AliITStrackerMI::AliITSlayer::
1163 SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1164 //--------------------------------------------------------------------
1165 // This function sets the "window"
1166 //--------------------------------------------------------------------
1168 Double_t circle=2*TMath::Pi()*fR;
1169 fYmin = ymin; fYmax =ymax;
1170 Float_t ymiddle = (fYmin+fYmax)*0.5;
1171 if (ymiddle<fYB[0]) {fYmin+=circle; fYmax+=circle;ymiddle+=circle;}
1173 if (ymiddle>fYB[1]) {fYmin-=circle; fYmax-=circle;ymiddle-=circle;}
1178 fClustersCs = fClusters;
1179 fClusterIndexCs = fClusterIndex;
1185 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy20){
1186 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy20);
1187 if (slice<0) slice=0;
1188 if (slice>20) slice=20;
1189 Bool_t isOK = (fYmin>fBy20[slice][0]&&fYmax<fBy20[slice][1]);
1191 fCurrentSlice=slice;
1192 fClustersCs = fClusters20[fCurrentSlice];
1193 fClusterIndexCs = fClusterIndex20[fCurrentSlice];
1194 fYcs = fY20[fCurrentSlice];
1195 fZcs = fZ20[fCurrentSlice];
1196 fNcs = fN20[fCurrentSlice];
1201 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy10){
1202 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy10);
1203 if (slice<0) slice=0;
1204 if (slice>10) slice=10;
1205 Bool_t isOK = (fYmin>fBy10[slice][0]&&fYmax<fBy10[slice][1]);
1207 fCurrentSlice=slice;
1208 fClustersCs = fClusters10[fCurrentSlice];
1209 fClusterIndexCs = fClusterIndex10[fCurrentSlice];
1210 fYcs = fY10[fCurrentSlice];
1211 fZcs = fZ10[fCurrentSlice];
1212 fNcs = fN10[fCurrentSlice];
1217 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy5){
1218 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy5);
1219 if (slice<0) slice=0;
1220 if (slice>5) slice=5;
1221 Bool_t isOK = (fYmin>fBy5[slice][0]&&fYmax<fBy5[slice][1]);
1223 fCurrentSlice=slice;
1224 fClustersCs = fClusters5[fCurrentSlice];
1225 fClusterIndexCs = fClusterIndex5[fCurrentSlice];
1226 fYcs = fY5[fCurrentSlice];
1227 fZcs = fZ5[fCurrentSlice];
1228 fNcs = fN5[fCurrentSlice];
1232 fI=FindClusterIndex(zmin); fZmax=zmax;
1233 fImax = TMath::Min(FindClusterIndex(zmax)+1,fNcs);
1241 Int_t AliITStrackerMI::AliITSlayer::
1242 FindDetectorIndex(Double_t phi, Double_t z) const {
1243 //--------------------------------------------------------------------
1244 //This function finds the detector crossed by the track
1245 //--------------------------------------------------------------------
1246 Double_t dphi=-(phi-fPhiOffset);
1247 if (dphi < 0) dphi += 2*TMath::Pi();
1248 else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi();
1249 Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5);
1250 if (np>=fNladders) np-=fNladders;
1251 if (np<0) np+=fNladders;
1253 Double_t dz=fZOffset-z;
1254 Int_t nz=Int_t(dz*(fNdetectors-1)*0.5/fZOffset+0.5);
1255 if (nz>=fNdetectors) return -1;
1256 if (nz<0) return -1;
1258 return np*fNdetectors + nz;
1262 const AliITSclusterV2 *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci){
1263 //--------------------------------------------------------------------
1264 // This function returns clusters within the "window"
1265 //--------------------------------------------------------------------
1267 if (fCurrentSlice<0){
1268 Double_t rpi2 = 2.*fR*TMath::Pi();
1269 for (Int_t i=fI; i<fImax; i++) {
1271 if (fYmax<y) y -= rpi2;
1272 if (fYmin>y) y += rpi2;
1273 if (y<fYmin) continue;
1274 if (y>fYmax) continue;
1275 if (fClusters[i]->GetQ()==0&&fSkip==2) continue;
1278 return fClusters[i];
1282 for (Int_t i=fI; i<fImax; i++) {
1283 if (fYcs[i]<fYmin) continue;
1284 if (fYcs[i]>fYmax) continue;
1285 if (fClustersCs[i]->GetQ()==0&&fSkip==2) continue;
1286 ci=fClusterIndexCs[i];
1288 return fClustersCs[i];
1296 Double_t AliITStrackerMI::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0)
1298 //--------------------------------------------------------------------
1299 //This function returns the layer thickness at this point (units X0)
1300 //--------------------------------------------------------------------
1303 if (43<fR&&fR<45) { //SSD2
1306 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1307 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1308 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1309 for (Int_t i=0; i<12; i++) {
1310 if (TMath::Abs(z-3.9*(i+0.5))<0.15) {
1311 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1315 if (TMath::Abs(z+3.9*(i+0.5))<0.15) {
1316 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1320 if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1321 if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1324 if (37<fR&&fR<41) { //SSD1
1327 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1328 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1329 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1330 for (Int_t i=0; i<11; i++) {
1331 if (TMath::Abs(z-3.9*i)<0.15) {
1332 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1336 if (TMath::Abs(z+3.9*i)<0.15) {
1337 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1341 if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1342 if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1345 if (13<fR&&fR<26) { //SDD
1348 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1350 if (TMath::Abs(y-1.80)<0.55) {
1352 for (Int_t j=0; j<20; j++) {
1353 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1354 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1357 if (TMath::Abs(y+1.80)<0.55) {
1359 for (Int_t j=0; j<20; j++) {
1360 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1361 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1365 for (Int_t i=0; i<4; i++) {
1366 if (TMath::Abs(z-7.3*i)<0.60) {
1368 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1371 if (TMath::Abs(z+7.3*i)<0.60) {
1373 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1378 if (6<fR&&fR<8) { //SPD2
1379 Double_t dd=0.0063; x0=21.5;
1381 if (TMath::Abs(y-3.08)>0.5) d+=dd;
1382 //if (TMath::Abs(y-3.08)>0.45) d+=dd;
1383 if (TMath::Abs(y-3.03)<0.10) {d+=0.014;}
1385 if (3<fR&&fR<5) { //SPD1
1386 Double_t dd=0.0063; x0=21.5;
1388 if (TMath::Abs(y+0.21)>0.6) d+=dd;
1389 //if (TMath::Abs(y+0.21)>0.45) d+=dd;
1390 if (TMath::Abs(y+0.10)<0.10) {d+=0.014;}
1396 Double_t AliITStrackerMI::GetEffectiveThickness(Double_t y,Double_t z) const
1398 //--------------------------------------------------------------------
1399 //Returns the thickness between the current layer and the vertex (units X0)
1400 //--------------------------------------------------------------------
1401 Double_t d=0.0028*3*3; //beam pipe
1404 Double_t xn=fgLayers[fI].GetR();
1405 for (Int_t i=0; i<fI; i++) {
1406 Double_t xi=fgLayers[i].GetR();
1407 d+=fgLayers[i].GetThickness(y,z,x0)*xi*xi;
1416 Double_t xi=0.5*(fgLayers[3].GetR()+fgLayers[4].GetR());
1423 Int_t AliITStrackerMI::AliITSlayer::InRoad() const {
1424 //--------------------------------------------------------------------
1425 // This function returns number of clusters within the "window"
1426 //--------------------------------------------------------------------
1428 for (Int_t i=fI; i<fN; i++) {
1429 const AliITSclusterV2 *c=fClusters[i];
1430 if (c->GetZ() > fZmax) break;
1431 if (c->IsUsed()) continue;
1432 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
1433 Double_t y=fR*det.GetPhi() + c->GetY();
1435 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
1436 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
1438 if (y<fYmin) continue;
1439 if (y>fYmax) continue;
1446 AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *t,const AliITStrackMI *c) {
1447 //--------------------------------------------------------------------
1448 // This function refits the track "t" at the position "x" using
1449 // the clusters from "c"
1450 //--------------------------------------------------------------------
1451 Int_t index[kMaxLayer];
1453 for (k=0; k<kMaxLayer; k++) index[k]=-1;
1454 Int_t nc=c->GetNumberOfClusters();
1455 for (k=0; k<nc; k++) {
1456 Int_t idx=c->GetClusterIndex(k),nl=(idx&0xf0000000)>>28;
1460 Int_t from, to, step;
1461 if (xx > t->GetX()) {
1462 from=0; to=kMaxLayer;
1465 from=kMaxLayer-1; to=-1;
1469 for (Int_t i=from; i != to; i += step) {
1470 AliITSlayer &layer=fgLayers[i];
1471 Double_t r=layer.GetR();
1474 Double_t hI=i-0.5*step;
1475 if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) {
1476 Double_t rs=0.5*(fgLayers[i-step].GetR() + r);
1477 Double_t d=0.0034, x0=38.6;
1478 if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;}
1479 if (!t->PropagateTo(rs,-step*d,x0)) {
1485 // remember old position [SR, GSI 18.02.2003]
1486 Double_t oldX=0., oldY=0., oldZ=0.;
1487 if (t->IsStartedTimeIntegral() && step==1) {
1488 t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ);
1493 if (!t->GetGlobalXYZat(r,x,y,z)) {
1496 Double_t phi=TMath::ATan2(y,x);
1497 Int_t idet=layer.FindDetectorIndex(phi,z);
1501 const AliITSdetector &det=layer.GetDetector(idet);
1503 if (!t->Propagate(phi,det.GetR())) {
1506 t->SetDetectorIndex(idet);
1508 const AliITSclusterV2 *cl=0;
1509 Double_t maxchi2=1000.*kMaxChi2;
1513 const AliITSclusterV2 *c=(AliITSclusterV2 *)GetCluster(idx);
1514 if (idet != c->GetDetectorIndex()) {
1515 idet=c->GetDetectorIndex();
1516 const AliITSdetector &det=layer.GetDetector(idet);
1517 if (!t->Propagate(det.GetPhi(),det.GetR())) {
1520 t->SetDetectorIndex(idet);
1522 //Double_t chi2=t->GetPredictedChi2(c);
1523 Int_t layer = (idx & 0xf0000000) >> 28;;
1524 Double_t chi2=GetPredictedChi2MI(t,c,layer);
1534 if (t->GetNumberOfClusters()>2) {
1535 Double_t dz=4*TMath::Sqrt(t->GetSigmaZ2()+kSigmaZ2[i]);
1536 Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+kSigmaY2[i]);
1537 Double_t zmin=t->GetZ() - dz;
1538 Double_t zmax=t->GetZ() + dz;
1539 Double_t ymin=t->GetY() + phi*r - dy;
1540 Double_t ymax=t->GetY() + phi*r + dy;
1541 layer.SelectClusters(zmin,zmax,ymin,ymax);
1543 const AliITSclusterV2 *c=0; Int_t ci=-1;
1544 while ((c=layer.GetNextCluster(ci))!=0) {
1545 if (idet != c->GetDetectorIndex()) continue;
1546 Double_t chi2=t->GetPredictedChi2(c);
1547 if (chi2<maxchi2) { cl=c; maxchi2=chi2; idx=ci; }
1552 //if (!t->Update(cl,maxchi2,idx)) {
1553 if (!UpdateMI(t,cl,maxchi2,idx)) {
1556 t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
1561 Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0);
1562 t->CorrectForMaterial(-step*d,x0);
1565 // track time update [SR, GSI 17.02.2003]
1566 if (t->IsStartedTimeIntegral() && step==1) {
1567 Double_t newX, newY, newZ;
1568 t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
1569 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
1570 (oldZ-newZ)*(oldZ-newZ);
1571 t->AddTimeStep(TMath::Sqrt(dL2));
1577 if (!t->PropagateTo(xx,0.,0.)) return kFALSE;
1582 Double_t AliITStrackerMI::GetNormalizedChi2(AliITStrackMI * track, Int_t mode)
1585 // calculate normalized chi2
1586 // return NormalizedChi2(track,0);
1589 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
1590 // track->fdEdxMismatch=0;
1591 Float_t dedxmismatch =0;
1592 Float_t *ny = GetNy(fCurrentEsdTrack), *nz = GetNz(fCurrentEsdTrack);
1594 for (Int_t i = 0;i<6;i++){
1595 if (track->fClIndex[i]>0){
1596 Float_t cerry, cerrz;
1597 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1599 { cerry= track->fSigmaY[i]; cerrz = track->fSigmaZ[i];}
1602 Float_t cchi2 = (track->fDy[i]*track->fDy[i]/cerry)+(track->fDz[i]*track->fDz[i]/cerrz);
1604 Float_t ratio = track->fNormQ[i]/track->fExpQ;
1606 cchi2+=(0.5-ratio)*10.;
1607 //track->fdEdxMismatch+=(0.5-ratio)*10.;
1608 dedxmismatch+=(0.5-ratio)*10.;
1612 AliITSclusterV2 * cl = (AliITSclusterV2*)GetCluster( track->fClIndex[i]);
1613 Double_t delta = cl->GetNy()+cl->GetNz()-ny[i]-nz[i];
1614 if (delta>1) chi2 +=0.5*TMath::Min(delta/2,2.);
1615 if (i<2) chi2+=2*cl->GetDeltaProbability();
1621 if (TMath::Abs(track->fdEdxMismatch-dedxmismatch)>0.0001){
1622 track->fdEdxMismatch = dedxmismatch;
1626 for (Int_t i = 0;i<4;i++){
1627 if (track->fClIndex[i]>0){
1628 Float_t cerry, cerrz;
1629 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1630 else { cerry= track->fSigmaY[i]; cerrz = track->fSigmaZ[i];}
1633 chi2+= (track->fDy[i]*track->fDy[i]/cerry);
1634 chi2+= (track->fDz[i]*track->fDz[i]/cerrz);
1638 for (Int_t i = 4;i<6;i++){
1639 if (track->fClIndex[i]>0){
1640 Float_t cerry, cerrz;
1641 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1642 else { cerry= track->fSigmaY[i]; cerrz = track->fSigmaZ[i];}
1645 Float_t cerryb, cerrzb;
1646 if (ny[i+6]>0) {cerryb = erry[i+6]; cerrzb=errz[i+6];}
1647 else { cerryb= track->fSigmaY[i+6]; cerrzb = track->fSigmaZ[i+6];}
1650 chi2+= TMath::Min((track->fDy[i+6]*track->fDy[i+6]/cerryb),track->fDy[i]*track->fDy[i]/cerry);
1651 chi2+= TMath::Min((track->fDz[i+6]*track->fDz[i+6]/cerrzb),track->fDz[i]*track->fDz[i]/cerrz);
1656 if (track->fESDtrack->GetTPCsignal()>85){
1657 Float_t ratio = track->fdEdx/track->fESDtrack->GetTPCsignal();
1659 chi2+=(0.5-ratio)*5.;
1662 chi2+=(ratio-2.0)*3;
1666 Double_t match = TMath::Sqrt(track->fChi22);
1667 if (track->fConstrain) match/=track->GetNumberOfClusters();
1668 if (!track->fConstrain) match/=track->GetNumberOfClusters()-2.;
1669 if (match<0) match=0;
1670 Float_t deadzonefactor = (track->fNDeadZone>0) ? 3*(1.1-track->fDeadZoneProbability):0.;
1671 Double_t normchi2 = 2*track->fNSkipped+match+deadzonefactor+(1+(2*track->fNSkipped+deadzonefactor)/track->GetNumberOfClusters())*
1672 (chi2)/TMath::Max(double(sum-track->fNSkipped),
1673 1./(1.+track->fNSkipped));
1679 Double_t AliITStrackerMI::GetMatchingChi2(AliITStrackMI * track1, AliITStrackMI * track2)
1682 // return matching chi2 between two tracks
1683 AliITStrackMI track3(*track2);
1684 track3.Propagate(track1->GetAlpha(),track1->GetX());
1686 vec(0,0)=track1->fP0-track3.fP0;
1687 vec(1,0)=track1->fP1-track3.fP1;
1688 vec(2,0)=track1->fP2-track3.fP2;
1689 vec(3,0)=track1->fP3-track3.fP3;
1690 vec(4,0)=track1->fP4-track3.fP4;
1693 cov(0,0) = track1->fC00+track3.fC00;
1694 cov(1,1) = track1->fC11+track3.fC11;
1695 cov(2,2) = track1->fC22+track3.fC22;
1696 cov(3,3) = track1->fC33+track3.fC33;
1697 cov(4,4) = track1->fC44+track3.fC44;
1699 cov(0,1)=cov(1,0) = track1->fC10+track3.fC10;
1700 cov(0,2)=cov(2,0) = track1->fC20+track3.fC20;
1701 cov(0,3)=cov(3,0) = track1->fC30+track3.fC30;
1702 cov(0,4)=cov(4,0) = track1->fC40+track3.fC40;
1704 cov(1,2)=cov(2,1) = track1->fC21+track3.fC21;
1705 cov(1,3)=cov(3,1) = track1->fC31+track3.fC31;
1706 cov(1,4)=cov(4,1) = track1->fC41+track3.fC41;
1708 cov(2,3)=cov(3,2) = track1->fC32+track3.fC32;
1709 cov(2,4)=cov(4,2) = track1->fC42+track3.fC42;
1711 cov(3,4)=cov(4,3) = track1->fC43+track3.fC43;
1714 TMatrixD vec2(cov,TMatrixD::kMult,vec);
1715 TMatrixD chi2(vec2,TMatrixD::kTransposeMult,vec);
1719 Double_t AliITStrackerMI::GetDeadZoneProbability(Double_t zpos, Double_t zerr)
1722 // return probability that given point - characterized by z position and error is in dead zone
1724 Double_t probability =0;
1725 Double_t absz = TMath::Abs(zpos);
1726 Double_t nearestz = (absz<2)? 0.:7.1;
1727 if (TMath::Abs(absz-nearestz)>0.25+3*zerr) return 0;
1728 Double_t zmin=0, zmax=0;
1730 zmin = -7.25; zmax = -6.95;
1733 zmin = 7.0; zmax =7.3;
1736 zmin = -0.75; zmax = 1.5;
1738 probability = (TMath::Erf((zpos-zmin)/zerr) - TMath::Erf((zpos-zmax)/zerr))*0.5;
1743 Double_t AliITStrackerMI::GetTruncatedChi2(AliITStrackMI * track, Float_t fac)
1746 // calculate normalized chi2
1748 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
1750 for (Int_t i = 0;i<6;i++){
1751 if (TMath::Abs(track->fDy[i])>0){
1752 chi2[i]= (track->fDy[i]/erry[i])*(track->fDy[i]/erry[i]);
1753 chi2[i]+= (track->fDz[i]/errz[i])*(track->fDz[i]/errz[i]);
1756 else{chi2[i]=10000;}
1759 TMath::Sort(6,chi2,index,kFALSE);
1760 Float_t max = float(ncl)*fac-1.;
1761 Float_t sumchi=0, sumweight=0;
1762 for (Int_t i=0;i<max+1;i++){
1763 Float_t weight = (i<max)?1.:(max+1.-i);
1764 sumchi+=weight*chi2[index[i]];
1767 Double_t normchi2 = sumchi/sumweight;
1772 Double_t AliITStrackerMI::GetInterpolatedChi2(AliITStrackMI * forwardtrack, AliITStrackMI * backtrack)
1775 // calculate normalized chi2
1776 // if (forwardtrack->fNUsed>0.3*float(forwardtrack->GetNumberOfClusters())) return 10000;
1779 for (Int_t i=0;i<6;i++){
1780 if ( (backtrack->fSigmaY[i]<0.000000001) || (forwardtrack->fSigmaY[i]<0.000000001)) continue;
1781 Double_t sy1 = forwardtrack->fSigmaY[i];
1782 Double_t sz1 = forwardtrack->fSigmaZ[i];
1783 Double_t sy2 = backtrack->fSigmaY[i];
1784 Double_t sz2 = backtrack->fSigmaZ[i];
1785 if (i<2){ sy2=1000.;sz2=1000;}
1787 Double_t dy0 = (forwardtrack->fDy[i]/(sy1*sy1) +backtrack->fDy[i]/(sy2*sy2))/(1./(sy1*sy1)+1./(sy2*sy2));
1788 Double_t dz0 = (forwardtrack->fDz[i]/(sz1*sz1) +backtrack->fDz[i]/(sz2*sz2))/(1./(sz1*sz1)+1./(sz2*sz2));
1790 Double_t nz0 = dz0*TMath::Sqrt((1./(sz1*sz1)+1./(sz2*sz2)));
1791 Double_t ny0 = dy0*TMath::Sqrt((1./(sy1*sy1)+1./(sy2*sy2)));
1793 res+= nz0*nz0+ny0*ny0;
1796 if (npoints>1) return
1797 TMath::Max(TMath::Abs(0.3*forwardtrack->Get1Pt())-0.5,0.)+
1798 //2*forwardtrack->fNUsed+
1799 res/TMath::Max(double(npoints-forwardtrack->fNSkipped),
1800 1./(1.+forwardtrack->fNSkipped));
1808 Float_t *AliITStrackerMI::GetWeight(Int_t index) {
1809 //--------------------------------------------------------------------
1810 // Return pointer to a given cluster
1811 //--------------------------------------------------------------------
1812 Int_t l=(index & 0xf0000000) >> 28;
1813 Int_t c=(index & 0x0fffffff) >> 00;
1814 return fgLayers[l].GetWeight(c);
1817 void AliITStrackerMI::RegisterClusterTracks(AliITStrackMI* track,Int_t id)
1819 //---------------------------------------------
1820 // register track to the list
1822 if (track->fESDtrack->GetKinkIndex(0)!=0) return; //don't register kink tracks
1825 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
1826 Int_t index = track->GetClusterIndex(icluster);
1827 Int_t l=(index & 0xf0000000) >> 28;
1828 Int_t c=(index & 0x0fffffff) >> 00;
1829 if (c>fgLayers[l].fN) continue;
1830 for (Int_t itrack=0;itrack<4;itrack++){
1831 if (fgLayers[l].fClusterTracks[itrack][c]<0){
1832 fgLayers[l].fClusterTracks[itrack][c]=id;
1838 void AliITStrackerMI::UnRegisterClusterTracks(AliITStrackMI* track, Int_t id)
1840 //---------------------------------------------
1841 // unregister track from the list
1842 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
1843 Int_t index = track->GetClusterIndex(icluster);
1844 Int_t l=(index & 0xf0000000) >> 28;
1845 Int_t c=(index & 0x0fffffff) >> 00;
1846 if (c>fgLayers[l].fN) continue;
1847 for (Int_t itrack=0;itrack<4;itrack++){
1848 if (fgLayers[l].fClusterTracks[itrack][c]==id){
1849 fgLayers[l].fClusterTracks[itrack][c]=-1;
1854 Float_t AliITStrackerMI::GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSclusterV2 *clist[6])
1856 //-------------------------------------------------------------
1857 //get number of shared clusters
1858 //-------------------------------------------------------------
1860 for (Int_t i=0;i<6;i++) { list[i]=-1, clist[i]=0;}
1861 // mean number of clusters
1862 Float_t *ny = GetNy(id), *nz = GetNz(id);
1865 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
1866 Int_t index = track->GetClusterIndex(icluster);
1867 Int_t l=(index & 0xf0000000) >> 28;
1868 Int_t c=(index & 0x0fffffff) >> 00;
1869 if (c>fgLayers[l].fN) continue;
1871 printf("problem\n");
1873 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(index);
1877 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
1878 if (l>2&&track->fNormQ[l]/track->fExpQ>3.5) continue;
1880 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
1883 deltan = (cl->GetNz()-nz[l]);
1885 if (deltan>2.0) continue; // extended - highly probable shared cluster
1886 weight = 2./TMath::Max(3.+deltan,2.);
1888 for (Int_t itrack=0;itrack<4;itrack++){
1889 if (fgLayers[l].fClusterTracks[itrack][c]>=0 && fgLayers[l].fClusterTracks[itrack][c]!=id){
1891 clist[l] = (AliITSclusterV2*)GetCluster(index);
1897 track->fNUsed=shared;
1901 Int_t AliITStrackerMI::GetOverlapTrack(AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6],Int_t overlist[6])
1904 // find first shared track
1906 // mean number of clusters
1907 Float_t *ny = GetNy(trackID), *nz = GetNz(trackID);
1909 for (Int_t i=0;i<6;i++) overlist[i]=-1;
1910 Int_t sharedtrack=100000;
1911 Int_t tracks[24],trackindex=0;
1912 for (Int_t i=0;i<24;i++) {tracks[i]=-1;}
1914 for (Int_t icluster=0;icluster<6;icluster++){
1915 if (clusterlist[icluster]<0) continue;
1916 Int_t index = clusterlist[icluster];
1917 Int_t l=(index & 0xf0000000) >> 28;
1918 Int_t c=(index & 0x0fffffff) >> 00;
1920 printf("problem\n");
1922 if (c>fgLayers[l].fN) continue;
1923 //if (l>3) continue;
1924 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(index);
1927 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
1928 if (l>2&&track->fNormQ[l]/track->fExpQ>3.5) continue;
1930 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
1933 deltan = (cl->GetNz()-nz[l]);
1935 if (deltan>2.0) continue; // extended - highly probable shared cluster
1937 for (Int_t itrack=3;itrack>=0;itrack--){
1938 if (fgLayers[l].fClusterTracks[itrack][c]<0) continue;
1939 if (fgLayers[l].fClusterTracks[itrack][c]!=trackID){
1940 tracks[trackindex] = fgLayers[l].fClusterTracks[itrack][c];
1945 if (trackindex==0) return -1;
1947 sharedtrack = tracks[0];
1949 if (trackindex==2) sharedtrack =TMath::Min(tracks[0],tracks[1]);
1952 Int_t track[24], cluster[24];
1953 for (Int_t i=0;i<trackindex;i++){ track[i]=-1; cluster[i]=0;}
1956 for (Int_t i=0;i<trackindex;i++){
1957 if (tracks[i]<0) continue;
1958 track[index] = tracks[i];
1960 for (Int_t j=i+1;j<trackindex;j++){
1961 if (tracks[j]<0) continue;
1962 if (tracks[j]==tracks[i]){
1970 for (Int_t i=0;i<index;i++){
1971 if (cluster[index]>max) {
1972 sharedtrack=track[index];
1979 if (sharedtrack>=100000) return -1;
1981 // make list of overlaps
1983 for (Int_t icluster=0;icluster<6;icluster++){
1984 if (clusterlist[icluster]<0) continue;
1985 Int_t index = clusterlist[icluster];
1986 Int_t l=(index & 0xf0000000) >> 28;
1987 Int_t c=(index & 0x0fffffff) >> 00;
1988 if (c>fgLayers[l].fN) continue;
1989 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(index);
1991 if (cl->GetNy()>2) continue;
1992 if (cl->GetNz()>2) continue;
1995 if (cl->GetNy()>3) continue;
1996 if (cl->GetNz()>3) continue;
1999 for (Int_t itrack=3;itrack>=0;itrack--){
2000 if (fgLayers[l].fClusterTracks[itrack][c]<0) continue;
2001 if (fgLayers[l].fClusterTracks[itrack][c]==sharedtrack){
2011 AliITStrackMI * AliITStrackerMI::GetBest2Tracks(Int_t trackID1, Int_t trackID2, Float_t th0, Float_t th1){
2013 // try to find track hypothesys without conflicts
2014 // with minimal chi2;
2015 TClonesArray *arr1 = (TClonesArray*)fTrackHypothesys.At(trackID1);
2016 Int_t entries1 = arr1->GetEntriesFast();
2017 TClonesArray *arr2 = (TClonesArray*)fTrackHypothesys.At(trackID2);
2018 if (!arr2) return (AliITStrackMI*) arr1->UncheckedAt(0);
2019 Int_t entries2 = arr2->GetEntriesFast();
2020 if (entries2<=0) return (AliITStrackMI*) arr1->UncheckedAt(0);
2022 AliITStrackMI * track10=(AliITStrackMI*) arr1->UncheckedAt(0);
2023 AliITStrackMI * track20=(AliITStrackMI*) arr2->UncheckedAt(0);
2024 if (TMath::Abs(1./track10->Get1Pt())>0.5+TMath::Abs(1/track20->Get1Pt())) return track10;
2026 for (Int_t itrack=0;itrack<entries1;itrack++){
2027 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
2028 UnRegisterClusterTracks(track,trackID1);
2031 for (Int_t itrack=0;itrack<entries2;itrack++){
2032 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
2033 UnRegisterClusterTracks(track,trackID2);
2037 Float_t maxconflicts=6;
2038 Double_t maxchi2 =1000.;
2040 // get weight of hypothesys - using best hypothesy
2043 Int_t list1[6],list2[6];
2044 AliITSclusterV2 *clist1[6], *clist2[6] ;
2045 RegisterClusterTracks(track10,trackID1);
2046 RegisterClusterTracks(track20,trackID2);
2047 Float_t conflict1 = GetNumberOfSharedClusters(track10,trackID1,list1,clist1);
2048 Float_t conflict2 = GetNumberOfSharedClusters(track20,trackID2,list2,clist2);
2049 UnRegisterClusterTracks(track10,trackID1);
2050 UnRegisterClusterTracks(track20,trackID2);
2053 Float_t chi21 =0,chi22=0,ncl1=0,ncl2=0;
2054 Float_t nerry[6],nerrz[6];
2055 Float_t *erry1=GetErrY(trackID1),*errz1 = GetErrZ(trackID1);
2056 Float_t *erry2=GetErrY(trackID2),*errz2 = GetErrZ(trackID2);
2057 for (Int_t i=0;i<6;i++){
2058 if ( (erry1[i]>0) && (erry2[i]>0)) {
2059 nerry[i] = TMath::Min(erry1[i],erry2[i]);
2060 nerrz[i] = TMath::Min(errz1[i],errz2[i]);
2062 nerry[i] = TMath::Max(erry1[i],erry2[i]);
2063 nerrz[i] = TMath::Max(errz1[i],errz2[i]);
2065 if (TMath::Abs(track10->fDy[i])>0.000000000000001){
2066 chi21 += track10->fDy[i]*track10->fDy[i]/(nerry[i]*nerry[i]);
2067 chi21 += track10->fDz[i]*track10->fDz[i]/(nerrz[i]*nerrz[i]);
2070 if (TMath::Abs(track20->fDy[i])>0.000000000000001){
2071 chi22 += track20->fDy[i]*track20->fDy[i]/(nerry[i]*nerry[i]);
2072 chi22 += track20->fDz[i]*track20->fDz[i]/(nerrz[i]*nerrz[i]);
2080 Float_t d1 = TMath::Sqrt(track10->fD[0]*track10->fD[0]+track10->fD[1]*track10->fD[1])+0.1;
2081 Float_t d2 = TMath::Sqrt(track20->fD[0]*track20->fD[0]+track20->fD[1]*track20->fD[1])+0.1;
2082 Float_t s1 = TMath::Sqrt(track10->GetSigmaY2()*track10->GetSigmaZ2());
2083 Float_t s2 = TMath::Sqrt(track20->GetSigmaY2()*track20->GetSigmaZ2());
2085 w1 = (d2/(d1+d2)+ 2*s2/(s1+s2)+
2086 +s2/(s1+s2)*0.5*(chi22+2.)/(chi21+chi22+4.)
2087 +1.*TMath::Abs(1./track10->Get1Pt())/(TMath::Abs(1./track10->Get1Pt())+TMath::Abs(1./track20->Get1Pt()))
2089 w2 = (d1/(d1+d2)+ 2*s1/(s1+s2)+
2090 s1/(s1+s2)*0.5*(chi21+2.)/(chi21+chi22+4.)
2091 +1.*TMath::Abs(1./track20->Get1Pt())/(TMath::Abs(1./track10->Get1Pt())+TMath::Abs(1./track20->Get1Pt()))
2094 Double_t sumw = w1+w2;
2098 w1 = (d2+0.5)/(d1+d2+1.);
2099 w2 = (d1+0.5)/(d1+d2+1.);
2101 // Float_t maxmax = w1*track10->fChi2MIP[0]+w2*track20->fChi2MIP[0]+w1*conflict1+w2*conflict2+1.;
2102 //Float_t maxconflicts0 = w1*conflict1+w2*conflict2;
2104 // get pair of "best" hypothesys
2106 Float_t * ny1 = GetNy(trackID1), * nz1 = GetNz(trackID1);
2107 Float_t * ny2 = GetNy(trackID2), * nz2 = GetNz(trackID2);
2109 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
2110 AliITStrackMI * track1=(AliITStrackMI*) arr1->UncheckedAt(itrack1);
2111 //if (track1->fFakeRatio>0) continue;
2112 RegisterClusterTracks(track1,trackID1);
2113 for (Int_t itrack2=0;itrack2<entries2;itrack2++){
2114 AliITStrackMI * track2=(AliITStrackMI*) arr2->UncheckedAt(itrack2);
2116 // Float_t current = w1*track1->fChi2MIP[0]+w2*track2->fChi2MIP[0];
2117 //if (track2->fFakeRatio>0) continue;
2119 RegisterClusterTracks(track2,trackID2);
2120 Int_t list1[6],list2[6];
2121 AliITSclusterV2 *clist1[6], *clist2[6] ;
2122 Float_t cconflict1 = GetNumberOfSharedClusters(track1,trackID1,list1,clist1);
2123 Float_t cconflict2 = GetNumberOfSharedClusters(track2,trackID2,list2,clist2);
2124 UnRegisterClusterTracks(track2,trackID2);
2126 if (track1->fConstrain) nskipped+=w1*track1->fNSkipped;
2127 if (track2->fConstrain) nskipped+=w2*track2->fNSkipped;
2128 if (nskipped>0.5) continue;
2130 //if ( w1*conflict1+w2*conflict2>maxconflicts0) continue;
2131 if (conflict1+1<cconflict1) continue;
2132 if (conflict2+1<cconflict2) continue;
2136 for (Int_t i=0;i<6;i++){
2138 Float_t c1 =0.; // conflict coeficients
2140 if (clist1[i]&&clist2[i]){
2143 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-TMath::Max(ny1[i],ny2[i])-TMath::Max(nz1[i],nz2[i]));
2146 deltan = (clist1[i]->GetNz()-TMath::Max(nz1[i],nz2[i]));
2148 c1 = 2./TMath::Max(3.+deltan,2.);
2149 c2 = 2./TMath::Max(3.+deltan,2.);
2155 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-ny1[i]-nz1[i]);
2158 deltan = (clist1[i]->GetNz()-nz1[i]);
2160 c1 = 2./TMath::Max(3.+deltan,2.);
2167 deltan = (clist2[i]->GetNy()+clist2[i]->GetNz()-ny2[i]-nz2[i]);
2170 deltan = (clist2[i]->GetNz()-nz2[i]);
2172 c2 = 2./TMath::Max(3.+deltan,2.);
2177 Double_t chi21=0,chi22=0;
2178 if (TMath::Abs(track1->fDy[i])>0.) {
2179 chi21 = (track1->fDy[i]/track1->fSigmaY[i])*(track1->fDy[i]/track1->fSigmaY[i])+
2180 (track1->fDz[i]/track1->fSigmaZ[i])*(track1->fDz[i]/track1->fSigmaZ[i]);
2181 //chi21 = (track1->fDy[i]*track1->fDy[i])/(nerry[i]*nerry[i])+
2182 // (track1->fDz[i]*track1->fDz[i])/(nerrz[i]*nerrz[i]);
2184 if (TMath::Abs(track1->fSigmaY[i]>0.)) c1=1;
2187 if (TMath::Abs(track2->fDy[i])>0.) {
2188 chi22 = (track2->fDy[i]/track2->fSigmaY[i])*(track2->fDy[i]/track2->fSigmaY[i])+
2189 (track2->fDz[i]/track2->fSigmaZ[i])*(track2->fDz[i]/track2->fSigmaZ[i]);
2190 //chi22 = (track2->fDy[i]*track2->fDy[i])/(nerry[i]*nerry[i])+
2191 // (track2->fDz[i]*track2->fDz[i])/(nerrz[i]*nerrz[i]);
2194 if (TMath::Abs(track2->fSigmaY[i]>0.)) c2=1;
2196 sumchi2+=w1*(1.+c1)*(1+c1)*(chi21+c1)+w2*(1.+c2)*(1+c2)*(chi22+c2);
2197 if (chi21>0) sum+=w1;
2198 if (chi22>0) sum+=w2;
2201 Double_t norm = sum-w1*track1->fNSkipped-w2*track2->fNSkipped;
2202 if (norm<0) norm =1/(w1*track1->fNSkipped+w2*track2->fNSkipped);
2203 Double_t normchi2 = 2*conflict+sumchi2/sum;
2204 if ( normchi2 <maxchi2 ){
2207 maxconflicts = conflict;
2211 UnRegisterClusterTracks(track1,trackID1);
2214 // if (maxconflicts<4 && maxchi2<th0){
2215 if (maxchi2<th0*2.){
2216 Float_t orig = track10->fFakeRatio*track10->GetNumberOfClusters();
2217 AliITStrackMI* track1=(AliITStrackMI*) arr1->UncheckedAt(index1);
2218 track1->fChi2MIP[5] = maxconflicts;
2219 track1->fChi2MIP[6] = maxchi2;
2220 track1->fChi2MIP[7] = 0.01+orig-(track1->fFakeRatio*track1->GetNumberOfClusters());
2221 // track1->UpdateESDtrack(AliESDtrack::kITSin);
2222 track1->fChi2MIP[8] = index1;
2223 fBestTrackIndex[trackID1] =index1;
2224 UpdateESDtrack(track1, AliESDtrack::kITSin);
2226 else if (track10->fChi2MIP[0]<th1){
2227 track10->fChi2MIP[5] = maxconflicts;
2228 track10->fChi2MIP[6] = maxchi2;
2229 // track10->UpdateESDtrack(AliESDtrack::kITSin);
2230 UpdateESDtrack(track10,AliESDtrack::kITSin);
2233 for (Int_t itrack=0;itrack<entries1;itrack++){
2234 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
2235 UnRegisterClusterTracks(track,trackID1);
2238 for (Int_t itrack=0;itrack<entries2;itrack++){
2239 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
2240 UnRegisterClusterTracks(track,trackID2);
2243 if (track10->fConstrain&&track10->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track10->fChi2MIP[1]<kMaxChi2PerCluster[1]
2244 &&track10->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track10->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2245 // if (track10->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track10->fChi2MIP[1]<kMaxChi2PerCluster[1]
2246 // &&track10->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track10->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2247 RegisterClusterTracks(track10,trackID1);
2249 if (track20->fConstrain&&track20->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track20->fChi2MIP[1]<kMaxChi2PerCluster[1]
2250 &&track20->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track20->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2251 //if (track20->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track20->fChi2MIP[1]<kMaxChi2PerCluster[1]
2252 // &&track20->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track20->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2253 RegisterClusterTracks(track20,trackID2);
2259 void AliITStrackerMI::UseClusters(const AliKalmanTrack *t, Int_t from) const {
2260 //--------------------------------------------------------------------
2261 // This function marks clusters assigned to the track
2262 //--------------------------------------------------------------------
2263 AliTracker::UseClusters(t,from);
2265 AliITSclusterV2 *c=(AliITSclusterV2 *)GetCluster(t->GetClusterIndex(0));
2266 //if (c->GetQ()>2) c->Use();
2267 if (c->GetSigmaZ2()>0.1) c->Use();
2268 c=(AliITSclusterV2 *)GetCluster(t->GetClusterIndex(1));
2269 //if (c->GetQ()>2) c->Use();
2270 if (c->GetSigmaZ2()>0.1) c->Use();
2275 void AliITStrackerMI::AddTrackHypothesys(AliITStrackMI * track, Int_t esdindex)
2277 //------------------------------------------------------------------
2278 // add track to the list of hypothesys
2279 //------------------------------------------------------------------
2281 if (esdindex>=fTrackHypothesys.GetEntriesFast()) fTrackHypothesys.Expand(esdindex*2+10);
2283 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2285 array = new TObjArray(10);
2286 fTrackHypothesys.AddAt(array,esdindex);
2288 array->AddLast(track);
2291 void AliITStrackerMI::SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode)
2293 //-------------------------------------------------------------------
2294 // compress array of track hypothesys
2295 // keep only maxsize best hypothesys
2296 //-------------------------------------------------------------------
2297 if (esdindex>fTrackHypothesys.GetEntriesFast()) return;
2298 if (! (fTrackHypothesys.At(esdindex)) ) return;
2299 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2300 Int_t entries = array->GetEntriesFast();
2302 //- find preliminary besttrack as a reference
2303 Float_t minchi2=10000;
2305 AliITStrackMI * besttrack=0;
2306 for (Int_t itrack=0;itrack<array->GetEntriesFast();itrack++){
2307 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2308 if (!track) continue;
2309 Float_t chi2 = NormalizedChi2(track,0);
2311 Int_t tpcLabel=track->fESDtrack->GetTPCLabel();
2312 track->SetLabel(tpcLabel);
2314 track->fFakeRatio=1.;
2315 CookLabel(track,0.); //For comparison only
2317 //if (chi2<kMaxChi2PerCluster[0]&&track->fFakeRatio==0){
2318 if (chi2<kMaxChi2PerCluster[0]){
2319 if (track->GetNumberOfClusters()<maxn) continue;
2320 maxn = track->GetNumberOfClusters();
2327 if (track->fConstrain || track->fN>5){ //keep best short tracks - without vertex constrain
2328 delete array->RemoveAt(itrack);
2332 if (!besttrack) return;
2335 //take errors of best track as a reference
2336 Float_t *erry = GetErrY(esdindex), *errz = GetErrZ(esdindex);
2337 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
2338 for (Int_t i=0;i<6;i++) {
2339 if (besttrack->fClIndex[i]>0){
2340 erry[i] = besttrack->fSigmaY[i]; erry[i+6] = besttrack->fSigmaY[i+6];
2341 errz[i] = besttrack->fSigmaZ[i]; errz[i+6] = besttrack->fSigmaZ[i+6];
2342 ny[i] = besttrack->fNy[i];
2343 nz[i] = besttrack->fNz[i];
2347 // calculate normalized chi2
2349 Float_t * chi2 = new Float_t[entries];
2350 Int_t * index = new Int_t[entries];
2351 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2352 for (Int_t itrack=0;itrack<entries;itrack++){
2353 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2355 track->fChi2MIP[0] = GetNormalizedChi2(track, mode);
2356 if (track->fChi2MIP[0]<kMaxChi2PerCluster[0])
2357 chi2[itrack] = track->fChi2MIP[0];
2359 if (track->fConstrain || track->fN>5){ //keep best short tracks - without vertex constrain
2360 delete array->RemoveAt(itrack);
2366 TMath::Sort(entries,chi2,index,kFALSE);
2367 besttrack = (AliITStrackMI*)array->At(index[0]);
2368 if (besttrack&&besttrack->fChi2MIP[0]<kMaxChi2PerCluster[0]){
2369 for (Int_t i=0;i<6;i++){
2370 if (besttrack->fClIndex[i]>0){
2371 erry[i] = besttrack->fSigmaY[i]; erry[i+6] = besttrack->fSigmaY[i+6];
2372 errz[i] = besttrack->fSigmaZ[i]; erry[i+6] = besttrack->fSigmaY[i+6];
2373 ny[i] = besttrack->fNy[i];
2374 nz[i] = besttrack->fNz[i];
2379 // calculate one more time with updated normalized errors
2380 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2381 for (Int_t itrack=0;itrack<entries;itrack++){
2382 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2384 track->fChi2MIP[0] = GetNormalizedChi2(track,mode);
2385 if (track->fChi2MIP[0]<kMaxChi2PerCluster[0])
2386 chi2[itrack] = track->fChi2MIP[0]-0*(track->GetNumberOfClusters()+track->fNDeadZone);
2389 if (track->fConstrain || track->fN>5){ //keep best short tracks - without vertex constrain
2390 delete array->RemoveAt(itrack);
2395 entries = array->GetEntriesFast();
2399 TObjArray * newarray = new TObjArray();
2400 TMath::Sort(entries,chi2,index,kFALSE);
2401 besttrack = (AliITStrackMI*)array->At(index[0]);
2404 for (Int_t i=0;i<6;i++){
2405 if (besttrack->fNz[i]>0&&besttrack->fNy[i]>0){
2406 erry[i] = besttrack->fSigmaY[i]; erry[i+6] = besttrack->fSigmaY[i+6];
2407 errz[i] = besttrack->fSigmaZ[i]; errz[i+6] = besttrack->fSigmaZ[i+6];
2408 ny[i] = besttrack->fNy[i];
2409 nz[i] = besttrack->fNz[i];
2412 besttrack->fChi2MIP[0] = GetNormalizedChi2(besttrack,mode);
2413 Float_t minchi2 = TMath::Min(besttrack->fChi2MIP[0]+5.+besttrack->fNUsed, double(kMaxChi2PerCluster[0]));
2414 Float_t minn = besttrack->GetNumberOfClusters()-3;
2416 for (Int_t i=0;i<entries;i++){
2417 AliITStrackMI * track = (AliITStrackMI*)array->At(index[i]);
2418 if (!track) continue;
2419 if (accepted>maxcut) break;
2420 track->fChi2MIP[0] = GetNormalizedChi2(track,mode);
2421 if (track->fConstrain || track->fN>5){ //keep best short tracks - without vertex constrain
2422 if (track->GetNumberOfClusters()<6 && (track->fChi2MIP[0]+track->fNUsed>minchi2)){
2423 delete array->RemoveAt(index[i]);
2427 Bool_t shortbest = !track->fConstrain && track->fN<6;
2428 if ((track->fChi2MIP[0]+track->fNUsed<minchi2 && track->GetNumberOfClusters()>=minn) ||shortbest){
2429 if (!shortbest) accepted++;
2431 newarray->AddLast(array->RemoveAt(index[i]));
2432 for (Int_t i=0;i<6;i++){
2434 erry[i] = track->fSigmaY[i]; erry[i+6] = track->fSigmaY[i+6];
2435 errz[i] = track->fSigmaZ[i]; errz[i] = track->fSigmaZ[i+6];
2436 ny[i] = track->fNy[i];
2437 nz[i] = track->fNz[i];
2442 delete array->RemoveAt(index[i]);
2446 delete fTrackHypothesys.RemoveAt(esdindex);
2447 fTrackHypothesys.AddAt(newarray,esdindex);
2451 delete fTrackHypothesys.RemoveAt(esdindex);
2460 AliITStrackMI * AliITStrackerMI::GetBestHypothesys(Int_t esdindex, AliITStrackMI * original, Int_t checkmax)
2462 //-------------------------------------------------------------
2463 // try to find best hypothesy
2464 // currently - minimal chi2 of track+backpropagated track+matching to the tpc track
2465 //-------------------------------------------------------------
2466 if (fTrackHypothesys.GetEntriesFast()<=esdindex) return 0;
2467 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2468 if (!array) return 0;
2469 Int_t entries = array->GetEntriesFast();
2470 if (!entries) return 0;
2471 Float_t minchi2 = 100000;
2472 AliITStrackMI * besttrack=0;
2474 AliITStrackMI * backtrack = new AliITStrackMI(*original);
2475 AliITStrackMI * forwardtrack = new AliITStrackMI(*original);
2476 Double_t xyzv[]={GetX(),GetY(),GetZ()};
2477 Double_t ersv[]={GetSigmaX()/3.,GetSigmaY()/3.,GetSigmaZ()/3.};
2479 for (Int_t i=0;i<entries;i++){
2480 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
2481 if (!track) continue;
2482 Float_t sigmarfi,sigmaz;
2483 GetDCASigma(track,sigmarfi,sigmaz);
2484 track->fDnorm[0] = sigmarfi;
2485 track->fDnorm[1] = sigmaz;
2487 track->fChi2MIP[1] = 1000000;
2488 track->fChi2MIP[2] = 1000000;
2489 track->fChi2MIP[3] = 1000000;
2492 backtrack = new(backtrack) AliITStrackMI(*track);
2493 if (track->fConstrain){
2494 if (!backtrack->PropagateTo(3.,0.0028,65.19)) continue;
2495 if (!backtrack->Improve(0,xyzv,ersv)) continue;
2496 if (!backtrack->PropagateTo(2.,0.0028,0)) continue;
2497 if (!backtrack->Improve(0,xyzv,ersv)) continue;
2498 if (!backtrack->PropagateTo(1.,0.0028,0)) continue;
2499 if (!backtrack->Improve(0,xyzv,ersv)) continue;
2500 if (!backtrack->PropagateToVertex()) continue;
2501 backtrack->ResetCovariance();
2502 if (!backtrack->Improve(0,xyzv,ersv)) continue;
2504 backtrack->ResetCovariance();
2506 backtrack->ResetClusters();
2508 Double_t x = original->GetX();
2509 if (!RefitAt(x,backtrack,track)) continue;
2511 track->fChi2MIP[1] = NormalizedChi2(backtrack,0);
2512 //for (Int_t i=2;i<6;i++){track->fDy[i]+=backtrack->fDy[i]; track->fDz[i]+=backtrack->fDz[i];}
2513 if (track->fChi2MIP[1]>kMaxChi2PerCluster[1]*6.) continue;
2514 track->fChi22 = GetMatchingChi2(backtrack,original);
2516 if ((track->fConstrain) && track->fChi22>90.) continue;
2517 if ((!track->fConstrain) && track->fChi22>30.) continue;
2518 if ( track->fChi22/track->GetNumberOfClusters()>11.) continue;
2521 if (!(track->fConstrain)&&track->fChi2MIP[1]>kMaxChi2PerCluster[1]) continue;
2525 //forward track - without constraint
2526 forwardtrack = new(forwardtrack) AliITStrackMI(*original);
2527 forwardtrack->ResetClusters();
2529 RefitAt(x,forwardtrack,track);
2530 track->fChi2MIP[2] = NormalizedChi2(forwardtrack,0);
2531 if (track->fChi2MIP[2]>kMaxChi2PerCluster[2]*6.0) continue;
2532 if (!(track->fConstrain)&&track->fChi2MIP[2]>kMaxChi2PerCluster[2]) continue;
2534 track->fD[0] = forwardtrack->GetD(GetX(),GetY());
2535 track->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
2536 forwardtrack->fD[0] = track->fD[0];
2537 forwardtrack->fD[1] = track->fD[1];
2540 AliITSclusterV2* clist[6];
2541 track->fChi2MIP[4] = GetNumberOfSharedClusters(track,esdindex,list,clist);
2542 if ( (!track->fConstrain) && track->fChi2MIP[4]>1.0) continue;
2545 track->fChi2MIP[3] = GetInterpolatedChi2(forwardtrack,backtrack);
2546 if ( (track->fChi2MIP[3]>6.*kMaxChi2PerCluster[3])) continue;
2547 if ( (!track->fConstrain) && (track->fChi2MIP[3]>2*kMaxChi2PerCluster[3])) {
2548 track->fChi2MIP[3]=1000;
2551 Double_t chi2 = track->fChi2MIP[0]+track->fNUsed;
2553 for (Int_t ichi=0;ichi<5;ichi++){
2554 forwardtrack->fChi2MIP[ichi] = track->fChi2MIP[ichi];
2556 if (chi2 < minchi2){
2557 //besttrack = new AliITStrackMI(*forwardtrack);
2559 besttrack->SetLabel(track->GetLabel());
2560 besttrack->fFakeRatio = track->fFakeRatio;
2562 original->fD[0] = forwardtrack->GetD(GetX(),GetY());
2563 original->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
2567 delete forwardtrack;
2569 for (Int_t i=0;i<entries;i++){
2570 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
2571 if (!track) continue;
2573 if (accepted>checkmax || track->fChi2MIP[3]>kMaxChi2PerCluster[3]*6. ||
2574 (track->GetNumberOfClusters()<besttrack->GetNumberOfClusters()-1.)||
2575 track->fChi2MIP[0]>besttrack->fChi2MIP[0]+2.*besttrack->fNUsed+3.){
2576 if (track->fConstrain || track->fN>5){ //keep best short tracks - without vertex constrain
2577 delete array->RemoveAt(i);
2587 SortTrackHypothesys(esdindex,checkmax,1);
2588 array = (TObjArray*) fTrackHypothesys.At(esdindex);
2589 besttrack = (AliITStrackMI*)array->At(0);
2590 if (!besttrack) return 0;
2591 besttrack->fChi2MIP[8]=0;
2592 fBestTrackIndex[esdindex]=0;
2593 entries = array->GetEntriesFast();
2594 AliITStrackMI *longtrack =0;
2596 Float_t minn=besttrack->GetNumberOfClusters()+besttrack->fNDeadZone;
2597 for (Int_t itrack=entries-1;itrack>0;itrack--){
2598 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2599 if (!track->fConstrain) continue;
2600 if (track->GetNumberOfClusters()+track->fNDeadZone<minn) continue;
2601 if (track->fChi2MIP[0]-besttrack->fChi2MIP[0]>0.0) continue;
2602 if (track->fChi2MIP[0]>4.) continue;
2603 minn = track->GetNumberOfClusters()+track->fNDeadZone;
2606 //if (longtrack) besttrack=longtrack;
2609 AliITSclusterV2 * clist[6];
2610 Float_t shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
2611 if (besttrack->fConstrain&&besttrack->fChi2MIP[0]<kMaxChi2PerCluster[0]&&besttrack->fChi2MIP[1]<kMaxChi2PerCluster[1]
2612 &&besttrack->fChi2MIP[2]<kMaxChi2PerCluster[2]&&besttrack->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2613 RegisterClusterTracks(besttrack,esdindex);
2620 Int_t sharedtrack = GetOverlapTrack(besttrack, esdindex, nshared, list, overlist);
2621 if (sharedtrack>=0){
2623 besttrack = GetBest2Tracks(esdindex,sharedtrack,10,5.5);
2625 shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
2631 if (shared>2.5) return 0;
2632 if (shared>1.0) return besttrack;
2634 // Don't sign clusters if not gold track
2636 if (!besttrack->IsGoldPrimary()) return besttrack;
2637 if (besttrack->fESDtrack->GetKinkIndex(0)!=0) return besttrack; //track belong to kink
2639 if (fConstraint[fPass]){
2643 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
2644 for (Int_t i=0;i<6;i++){
2645 Int_t index = besttrack->fClIndex[i];
2646 if (index<=0) continue;
2647 Int_t ilayer = (index & 0xf0000000) >> 28;
2648 if (besttrack->fSigmaY[ilayer]<0.00000000001) continue;
2649 AliITSclusterV2 *c = (AliITSclusterV2*)GetCluster(index);
2651 if (ilayer>3&&c->GetNy()+c->GetNz()>6) continue;
2652 if ( (c->GetNy()+c->GetNz() )> ny[i]+nz[i]+0.7) continue; //shared track
2653 if ( c->GetNz()> nz[i]+0.7) continue; //shared track
2654 if ( ilayer>2&& besttrack->fNormQ[ilayer]/besttrack->fExpQ>1.5) continue;
2655 //if ( c->GetNy()> ny[i]+0.7) continue; //shared track
2657 Bool_t cansign = kTRUE;
2658 for (Int_t itrack=0;itrack<entries; itrack++){
2659 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
2660 if (!track) continue;
2661 if (track->fChi2MIP[0]>besttrack->fChi2MIP[0]+2.*shared+1.) break;
2662 if ( (track->fClIndex[ilayer]>0) && (track->fClIndex[ilayer]!=besttrack->fClIndex[ilayer])){
2668 if (TMath::Abs(besttrack->fDy[ilayer]/besttrack->fSigmaY[ilayer])>3.) continue;
2669 if (TMath::Abs(besttrack->fDz[ilayer]/besttrack->fSigmaZ[ilayer])>3.) continue;
2670 if (!c->IsUsed()) c->Use();
2679 void AliITStrackerMI::GetBestHypothesysMIP(TObjArray &itsTracks)
2682 // get "best" hypothesys
2685 Int_t nentries = itsTracks.GetEntriesFast();
2686 for (Int_t i=0;i<nentries;i++){
2687 AliITStrackMI* track = (AliITStrackMI*)itsTracks.At(i);
2688 if (!track) continue;
2689 TObjArray * array = (TObjArray*) fTrackHypothesys.At(i);
2690 if (!array) continue;
2691 if (array->GetEntriesFast()<=0) continue;
2693 AliITStrackMI* longtrack=0;
2695 Float_t maxchi2=1000;
2696 for (Int_t j=0;j<array->GetEntriesFast();j++){
2697 AliITStrackMI* track = (AliITStrackMI*)array->At(j);
2698 if (!track) continue;
2699 if (track->fGoldV0) {
2700 longtrack = track; //gold V0 track taken
2703 if (track->GetNumberOfClusters()+track->fNDeadZone<minn) continue;
2704 Float_t chi2 = track->fChi2MIP[0];
2706 if (!track->fGoldV0&&track->fConstrain==kFALSE) chi2+=5;
2708 if (track->GetNumberOfClusters()+track->fNDeadZone>minn) maxchi2 = track->fChi2MIP[0];
2710 if (chi2 > maxchi2) continue;
2711 minn= track->GetNumberOfClusters()+track->fNDeadZone;
2718 AliITStrackMI * besttrack = (AliITStrackMI*)array->At(0);
2719 if (!longtrack) {longtrack = besttrack;}
2720 else besttrack= longtrack;
2724 AliITSclusterV2 * clist[6];
2725 Float_t shared = GetNumberOfSharedClusters(longtrack,i,list,clist);
2727 track->fNUsed = shared;
2728 track->fNSkipped = besttrack->fNSkipped;
2729 track->fChi2MIP[0] = besttrack->fChi2MIP[0];
2734 Int_t sharedtrack = GetOverlapTrack(longtrack, i, nshared, list, overlist);
2735 //if (sharedtrack==-1) sharedtrack=0;
2736 if (sharedtrack>=0){
2737 besttrack = GetBest2Tracks(i,sharedtrack,10,5.5);
2740 if (besttrack&&fAfterV0){
2741 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
2743 if (besttrack&&fConstraint[fPass])
2744 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
2745 //if (besttrack&&besttrack->fConstrain)
2746 // UpdateESDtrack(besttrack,AliESDtrack::kITSin);
2747 if (besttrack->fChi2MIP[0]+besttrack->fNUsed>1.5){
2748 if ( (TMath::Abs(besttrack->fD[0])>0.1) && fConstraint[fPass]) {
2749 track->fReconstructed= kFALSE;
2751 if ( (TMath::Abs(besttrack->fD[1])>0.1) && fConstraint[fPass]){
2752 track->fReconstructed= kFALSE;
2761 void AliITStrackerMI::CookLabel(AliITStrackMI *track,Float_t wrong) const {
2762 //--------------------------------------------------------------------
2763 //This function "cooks" a track label. If label<0, this track is fake.
2764 //--------------------------------------------------------------------
2767 if ( track->fESDtrack) tpcLabel = TMath::Abs(track->fESDtrack->GetTPCLabel());
2769 track->fChi2MIP[9]=0;
2771 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
2772 Int_t cindex = track->GetClusterIndex(i);
2773 Int_t l=(cindex & 0xf0000000) >> 28;
2774 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(cindex);
2776 for (Int_t ind=0;ind<3;ind++){
2778 if (cl->GetLabel(ind)==tpcLabel) isWrong=0;
2780 track->fChi2MIP[9]+=isWrong*(2<<l);
2783 track->fFakeRatio = double(nwrong)/double(track->GetNumberOfClusters());
2785 if (track->fFakeRatio>wrong) track->fLab = -tpcLabel;
2787 track->fLab = tpcLabel;
2794 void AliITStrackerMI::CookdEdx(AliITStrackMI* track)
2799 //AliITSclusterV2 * clist[6];
2800 // Int_t shared = GetNumberOfSharedClusters(track,index,list,clist);
2803 track->fChi2MIP[9]=0;
2804 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
2805 Int_t cindex = track->GetClusterIndex(i);
2806 Int_t l=(cindex & 0xf0000000) >> 28;
2807 AliITSclusterV2 *cl = (AliITSclusterV2*)GetCluster(cindex);
2808 Int_t lab = TMath::Abs(track->fESDtrack->GetTPCLabel());
2810 for (Int_t ind=0;ind<3;ind++){
2811 if (cl->GetLabel(ind)==lab) isWrong=0;
2813 track->fChi2MIP[9]+=isWrong*(2<<l);
2815 //if (l>3 && (cl->GetNy()>4) || (cl->GetNz()>4)) continue; //shared track
2816 //if (l>3&& !(cl->GetType()==1||cl->GetType()==10)) continue;
2817 //if (l<4&& !(cl->GetType()==1)) continue;
2818 dedx[accepted]= track->fdEdxSample[i];
2819 //dedx[accepted]= track->fNormQ[l];
2827 TMath::Sort(accepted,dedx,indexes,kFALSE);
2830 Double_t nl=low*accepted, nu =up*accepted;
2832 Float_t sumweight =0;
2833 for (Int_t i=0; i<accepted; i++) {
2835 if (i<nl+0.1) weight = TMath::Max(1.-(nl-i),0.);
2836 if (i>nu-1) weight = TMath::Max(nu-i,0.);
2837 sumamp+= dedx[indexes[i]]*weight;
2840 track->SetdEdx(sumamp/sumweight);
2844 void AliITStrackerMI::MakeCoeficients(Int_t ntracks){
2847 if (fCoeficients) delete []fCoeficients;
2848 fCoeficients = new Float_t[ntracks*48];
2849 for (Int_t i=0;i<ntracks*48;i++) fCoeficients[i]=-1.;
2853 Double_t AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSclusterV2 *cluster,Int_t layer)
2859 Float_t theta = track->GetTgl();
2860 Float_t phi = track->GetSnp();
2861 phi = TMath::Sqrt(phi*phi/(1.-phi*phi));
2862 GetError(layer,cluster,theta,phi,track->fExpQ,erry,errz);
2863 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz);
2865 GetNTeor(layer,cluster, theta,phi,ny,nz);
2866 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
2868 chi2+=0.5*TMath::Min(delta/2,2.);
2869 chi2+=2.*cluster->GetDeltaProbability();
2872 track->fNy[layer] =ny;
2873 track->fNz[layer] =nz;
2874 track->fSigmaY[layer] = erry;
2875 track->fSigmaZ[layer] = errz;
2876 //track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt(1+theta*theta+phi*phi);
2877 track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt((1.+ track->fP3*track->fP3)/(1.- track->fP2*track->fP2));
2882 Int_t AliITStrackerMI::UpdateMI(AliITStrackMI* track, const AliITSclusterV2* cl,Double_t chi2,Int_t index) const
2887 Int_t layer = (index & 0xf0000000) >> 28;
2888 track->fClIndex[layer] = index;
2889 if ( (layer>1) &&track->fNormQ[layer]/track->fExpQ<0.5 ) {
2890 chi2+= (0.5-track->fNormQ[layer]/track->fExpQ)*10.;
2891 track->fdEdxMismatch+=(0.5-track->fNormQ[layer]/track->fExpQ)*10.;
2893 return track->UpdateMI(cl->GetY(),cl->GetZ(),track->fSigmaY[layer],track->fSigmaZ[layer],chi2,index);
2896 void AliITStrackerMI::GetNTeor(Int_t layer, const AliITSclusterV2* /*cl*/, Float_t theta, Float_t phi, Float_t &ny, Float_t &nz)
2902 ny = 1.+TMath::Abs(phi)*3.2;
2903 nz = 1.+TMath::Abs(theta)*0.34;
2907 ny = 1.+TMath::Abs(phi)*3.2;
2908 nz = 1.+TMath::Abs(theta)*0.28;
2913 ny = 2.02+TMath::Abs(phi)*1.95;
2914 nz = 2.02+TMath::Abs(phi)*2.35;
2917 ny = 6.6-2.7*TMath::Abs(phi);
2918 nz = 2.8-3.11*TMath::Abs(phi)+0.45*TMath::Abs(theta);
2923 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)
2925 //calculate cluster position error
2928 GetNTeor(layer, cl,theta,phi,ny,nz);
2929 erry = TMath::Sqrt(cl->GetSigmaY2());
2930 errz = TMath::Sqrt(cl->GetSigmaZ2());
2935 if (TMath::Abs(ny-cl->GetNy())>0.6) {
2936 if (ny<cl->GetNy()){
2937 erry*=0.4+TMath::Abs(ny-cl->GetNy());
2938 errz*=0.4+TMath::Abs(ny-cl->GetNy());
2940 erry*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
2941 errz*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
2944 if (TMath::Abs(nz-cl->GetNz())>1.) {
2945 erry*=TMath::Abs(nz-cl->GetNz());
2946 errz*=TMath::Abs(nz-cl->GetNz());
2950 erry= TMath::Min(erry,float(0.005));
2951 errz= TMath::Min(errz,float(0.03));
2957 //factor 1.8 appears in new simulation
2960 if (cl->GetNy()==100||cl->GetNz()==100){
2965 if (cl->GetNy()+cl->GetNz()>12){
2970 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
2971 Float_t chargematch = TMath::Max(double(normq/expQ),2.);
2973 if (cl->GetType()==1 || cl->GetType()==10 ){
2974 if (chargematch<1.0 || (cl->GetNy()+cl->GetNz()<nz+ny+0.5)){
2976 erry = 0.00094*scale;
2979 if (cl->GetNy()+cl->GetNz()<nz+ny+1.2){
2984 erry = 0.0027*scale;
2985 errz = TMath::Min(0.028*(chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.15)*scale;
2988 if (cl->GetType()==2 || cl->GetType()==11 ){
2989 erry = TMath::Min(0.0010*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.05)*scale;
2990 errz = TMath::Min(0.025*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.5)*scale;
2994 if (cl->GetType()>100 ){
2995 if ((chargematch+cl->GetNy()+cl->GetNz()-nz-ny<1.5)){
2997 erry = 0.00096*scale;
3000 if (cl->GetNy()+cl->GetNz()-nz-ny<1){
3002 erry = 0.0025*scale;
3006 errz = TMath::Min(0.05*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.4)*scale;
3007 erry = TMath::Min(0.003*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.05)*scale;
3010 Float_t diff = cl->GetNy()+cl->GetNz()-ny-nz;
3014 if (cl->GetType()==5||cl->GetType()==6||cl->GetType()==7||cl->GetType()==8){
3024 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
3025 Float_t chargematch = normq/expQ;
3027 Int_t cnz = cl->GetNz()%10;
3029 if (cl->GetType()==1){
3030 if (chargematch<1.25){
3031 erry = 0.0028*(1.+6./cl->GetQ()); // gold clusters
3034 erry = 0.003*chargematch;
3035 if (cl->GetNz()==3) erry*=1.5;
3037 if (chargematch<1.0){
3038 errz = 0.0011*(1.+6./cl->GetQ());
3041 errz = 0.002*(1+2*(chargematch-1.));
3045 errz*=1.4*(cnz-nz+0.5);
3048 if (cl->GetType()>1){
3050 erry = 0.00385*(1.+6./cl->GetQ()); // gold clusters
3051 errz = 0.0016*(1.+6./cl->GetQ());
3054 errz = 0.0014*(1+3*(chargematch-1.));
3055 erry = 0.003*(1+3*(chargematch-1.));
3059 errz*=1.4*(cnz-nz+0.5);
3063 if (TMath::Abs(cl->GetY())>2.5){
3064 factorz*=1+2*(TMath::Abs(cl->GetY())-2.5);
3066 if (TMath::Abs(cl->GetY())<1){
3067 factorz*=1.+0.5*TMath::Abs(TMath::Abs(cl->GetY())-1.);
3069 factorz= TMath::Min(factorz,float(4.));
3072 erry= TMath::Min(erry,float(0.05));
3073 errz= TMath::Min(errz,float(0.05));
3079 void AliITStrackerMI::GetDCASigma(AliITStrackMI* track, Float_t & sigmarfi, Float_t &sigmaz)
3082 //DCA sigmas parameterization
3083 //to be paramterized using external parameters in future
3086 sigmarfi = 0.004+1.4 *TMath::Abs(track->fP4)+332.*track->fP4*track->fP4;
3087 sigmaz = 0.011+4.37*TMath::Abs(track->fP4);
3091 void AliITStrackerMI::SignDeltas( TObjArray *ClusterArray, Float_t vz)
3095 Int_t entries = ClusterArray->GetEntriesFast();
3096 if (entries<4) return;
3097 AliITSclusterV2* cluster = (AliITSclusterV2*)ClusterArray->At(0);
3098 Int_t layer = cluster->GetLayer();
3099 if (layer>1) return;
3101 Int_t ncandidates=0;
3102 Float_t r = (layer>0)? 7:4;
3104 for (Int_t i=0;i<entries;i++){
3105 AliITSclusterV2* cl0 = (AliITSclusterV2*)ClusterArray->At(i);
3106 Float_t nz = 1+TMath::Abs((cl0->GetZ()-vz)/r);
3107 if (cl0->GetNy()+cl0->GetNz()<=5+2*layer+nz) continue;
3108 index[ncandidates] = i; //candidate to belong to delta electron track
3110 if (cl0->GetNy()+cl0->GetNz()>9+2*layer+nz) {
3111 cl0->SetDeltaProbability(1);
3117 for (Int_t i=0;i<ncandidates;i++){
3118 AliITSclusterV2* cl0 = (AliITSclusterV2*)ClusterArray->At(index[i]);
3119 if (cl0->GetDeltaProbability()>0.8) continue;
3122 Float_t y[100],z[100],sumy,sumz,sumy2, sumyz, sumw;
3123 sumy=sumz=sumy2=sumyz=sumw=0.0;
3124 for (Int_t j=0;j<ncandidates;j++){
3126 AliITSclusterV2* cl1 = (AliITSclusterV2*)ClusterArray->At(index[j]);
3128 Float_t dz = cl0->GetZ()-cl1->GetZ();
3129 Float_t dy = cl0->GetY()-cl1->GetY();
3130 if (TMath::Sqrt(dz*dz+dy*dy)<0.2){
3131 Float_t weight = cl1->GetNy()+cl1->GetNz()-2;
3132 y[ncl] = cl1->GetY();
3133 z[ncl] = cl1->GetZ();
3134 sumy+= y[ncl]*weight;
3135 sumz+= z[ncl]*weight;
3136 sumy2+=y[ncl]*y[ncl]*weight;
3137 sumyz+=y[ncl]*z[ncl]*weight;
3142 if (ncl<4) continue;
3143 Float_t det = sumw*sumy2 - sumy*sumy;
3145 if (TMath::Abs(det)>0.01){
3146 Float_t z0 = (sumy2*sumz - sumy*sumyz)/det;
3147 Float_t k = (sumyz*sumw - sumy*sumz)/det;
3148 delta = TMath::Abs(cl0->GetZ()-(z0+k*cl0->GetY()));
3151 Float_t z0 = sumyz/sumy;
3152 delta = TMath::Abs(cl0->GetZ()-z0);
3155 cl0->SetDeltaProbability(1-20.*delta);
3161 void AliITStrackerMI::UpdateESDtrack(AliITStrackMI* track, ULong_t flags) const
3165 track->UpdateESDtrack(flags);
3166 AliITStrackMI * oldtrack = (AliITStrackMI*)(track->fESDtrack->GetITStrack());
3167 if (oldtrack) delete oldtrack;
3168 track->fESDtrack->SetITStrack(new AliITStrackMI(*track));
3169 if (TMath::Abs(track->fDnorm[1])<0.000000001){
3170 printf("Problem\n");
3176 Int_t AliITStrackerMI::GetNearestLayer(const Double_t *xr) const{
3178 //Get nearest upper layer close to the point xr.
3179 // rough approximation
3181 const Float_t kRadiuses[6]={4,6.5,15.03,24.,38.5,43.7};
3182 Float_t radius = TMath::Sqrt(xr[0]*xr[0]+xr[1]*xr[1]);
3184 for (Int_t i=0;i<6;i++){
3185 if (radius<kRadiuses[i]){
3194 void AliITStrackerMI::UpdateTPCV0(AliESD *event){
3196 //try to update, or reject TPC V0s
3198 Int_t nv0s = event->GetNumberOfV0MIs();
3199 Int_t nitstracks = fTrackHypothesys.GetEntriesFast();
3201 for (Int_t i=0;i<nv0s;i++){
3202 AliESDV0MI * vertex = event->GetV0MI(i);
3203 Int_t ip = vertex->GetIndex(0);
3204 Int_t im = vertex->GetIndex(1);
3206 TObjArray * arrayp = (ip<nitstracks) ? (TObjArray*)fTrackHypothesys.At(ip):0;
3207 TObjArray * arraym = (im<nitstracks) ? (TObjArray*)fTrackHypothesys.At(im):0;
3208 AliITStrackMI * trackp = (arrayp!=0) ? (AliITStrackMI*)arrayp->At(0):0;
3209 AliITStrackMI * trackm = (arraym!=0) ? (AliITStrackMI*)arraym->At(0):0;
3213 if (trackp->fN+trackp->fNDeadZone>5.5){
3214 if (trackp->fConstrain&&trackp->fChi2MIP[0]<3) vertex->SetStatus(-100);
3215 if (!trackp->fConstrain&&trackp->fChi2MIP[0]<2) vertex->SetStatus(-100);
3220 if (trackm->fN+trackm->fNDeadZone>5.5){
3221 if (trackm->fConstrain&&trackm->fChi2MIP[0]<3) vertex->SetStatus(-100);
3222 if (!trackm->fConstrain&&trackm->fChi2MIP[0]<2) vertex->SetStatus(-100);
3225 if (vertex->GetStatus()==-100) continue;
3227 Int_t clayer = GetNearestLayer(vertex->GetXrp());
3228 vertex->SetNBefore(clayer); //
3229 vertex->SetChi2Before(9*clayer); //
3230 vertex->SetNAfter(6-clayer); //
3231 vertex->SetChi2After(0); //
3233 if (clayer >1 ){ // calculate chi2 before vertex
3234 Float_t chi2p = 0, chi2m=0;
3237 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
3238 if (trackp->fClIndex[ilayer]>0){
3239 chi2p+=trackp->fDy[ilayer]*trackp->fDy[ilayer]/(trackp->fSigmaY[ilayer]*trackp->fSigmaY[ilayer])+
3240 trackp->fDz[ilayer]*trackp->fDz[ilayer]/(trackp->fSigmaZ[ilayer]*trackp->fSigmaZ[ilayer]);
3251 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
3252 if (trackm->fClIndex[ilayer]>0){
3253 chi2m+=trackm->fDy[ilayer]*trackm->fDy[ilayer]/(trackm->fSigmaY[ilayer]*trackm->fSigmaY[ilayer])+
3254 trackm->fDz[ilayer]*trackm->fDz[ilayer]/(trackm->fSigmaZ[ilayer]*trackm->fSigmaZ[ilayer]);
3263 vertex->SetChi2Before(TMath::Min(chi2p,chi2m));
3264 if (TMath::Min(chi2p,chi2m)/Float_t(clayer)<4) vertex->SetStatus(-10); // track exist before vertex
3267 if (clayer < 5 ){ // calculate chi2 after vertex
3268 Float_t chi2p = 0, chi2m=0;
3270 if (trackp&&TMath::Abs(trackp->fP3)<1.){
3271 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
3272 if (trackp->fClIndex[ilayer]>0){
3273 chi2p+=trackp->fDy[ilayer]*trackp->fDy[ilayer]/(trackp->fSigmaY[ilayer]*trackp->fSigmaY[ilayer])+
3274 trackp->fDz[ilayer]*trackp->fDz[ilayer]/(trackp->fSigmaZ[ilayer]*trackp->fSigmaZ[ilayer]);
3284 if (trackm&&TMath::Abs(trackm->fP3)<1.){
3285 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
3286 if (trackm->fClIndex[ilayer]>0){
3287 chi2m+=trackm->fDy[ilayer]*trackm->fDy[ilayer]/(trackm->fSigmaY[ilayer]*trackm->fSigmaY[ilayer])+
3288 trackm->fDz[ilayer]*trackm->fDz[ilayer]/(trackm->fSigmaZ[ilayer]*trackm->fSigmaZ[ilayer]);
3297 vertex->SetChi2After(TMath::Max(chi2p,chi2m));
3298 if (TMath::Max(chi2m,chi2p)/Float_t(6-clayer)>9) vertex->SetStatus(-20); // track not found in ITS
3304 void AliITStrackerMI::FindV02(AliESD *event)
3309 // Cuts on DCA - R dependent
3310 // max distance DCA between 2 tracks cut
3311 // maxDist = TMath::Min(kMaxDist,kMaxDist0+pvertex->GetRr()*kMaxDist);
3313 const Float_t kMaxDist0 = 0.1;
3314 const Float_t kMaxDist1 = 0.1;
3315 const Float_t kMaxDist = 1;
3316 const Float_t kMinPointAngle = 0.85;
3317 const Float_t kMinPointAngle2 = 0.99;
3318 const Float_t kMinR = 0.5;
3319 const Float_t kMaxR = 220;
3320 //const Float_t kCausality0Cut = 0.19;
3321 //const Float_t kLikelihood01Cut = 0.25;
3322 //const Float_t kPointAngleCut = 0.9996;
3323 const Float_t kCausality0Cut = 0.19;
3324 const Float_t kLikelihood01Cut = 0.45;
3325 const Float_t kLikelihood1Cut = 0.5;
3326 const Float_t kCombinedCut = 0.55;
3330 TTreeSRedirector &cstream = *fDebugStreamer;
3331 Int_t ntracks = event->GetNumberOfTracks();
3332 Int_t nitstracks = fTrackHypothesys.GetEntriesFast();
3333 fOriginal.Expand(ntracks);
3334 fTrackHypothesys.Expand(ntracks);
3335 fBestHypothesys.Expand(ntracks);
3337 AliHelix * helixes = new AliHelix[ntracks+2];
3338 TObjArray trackarray(ntracks+2); //array with tracks - with vertex constrain
3339 TObjArray trackarrayc(ntracks+2); //array of "best tracks" - without vertex constrain
3340 TObjArray trackarrayl(ntracks+2); //array of "longest tracks" - without vertex constrain
3341 Bool_t * forbidden = new Bool_t [ntracks+2];
3342 Int_t *itsmap = new Int_t [ntracks+2];
3343 Float_t *dist = new Float_t[ntracks+2];
3344 Float_t *normdist0 = new Float_t[ntracks+2];
3345 Float_t *normdist1 = new Float_t[ntracks+2];
3346 Float_t *normdist = new Float_t[ntracks+2];
3347 Float_t *norm = new Float_t[ntracks+2];
3348 Float_t *maxr = new Float_t[ntracks+2];
3349 Float_t *minr = new Float_t[ntracks+2];
3350 Float_t *minPointAngle= new Float_t[ntracks+2];
3352 AliESDV0MI *pvertex = new AliESDV0MI;
3353 AliITStrackMI * dummy= new AliITStrackMI;
3355 AliITStrackMI trackat0; //temporary track for DCA calculation
3357 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
3359 // make its - esd map
3361 for (Int_t itrack=0;itrack<ntracks+2;itrack++) {
3362 itsmap[itrack] = -1;
3363 forbidden[itrack] = kFALSE;
3364 maxr[itrack] = kMaxR;
3365 minr[itrack] = kMinR;
3366 minPointAngle[itrack] = kMinPointAngle;
3368 for (Int_t itrack=0;itrack<nitstracks;itrack++){
3369 AliITStrackMI * original = (AliITStrackMI*)(fOriginal.At(itrack));
3370 Int_t esdindex = original->fESDtrack->GetID();
3371 itsmap[esdindex] = itrack;
3374 // create its tracks from esd tracks if not done before
3376 for (Int_t itrack=0;itrack<ntracks;itrack++){
3377 if (itsmap[itrack]>=0) continue;
3378 AliITStrackMI * tpctrack = new AliITStrackMI(*(event->GetTrack(itrack)));
3379 tpctrack->fD[0] = tpctrack->GetD(GetX(),GetY());
3380 tpctrack->fD[1] = tpctrack->GetZat(GetX())-GetZ();
3381 if (tpctrack->fD[0]<20 && tpctrack->fD[1]<20){
3382 // tracks which can reach inner part of ITS
3383 // propagate track to outer its volume - with correction for material
3384 CorrectForDeadZoneMaterial(tpctrack);
3386 itsmap[itrack] = nitstracks;
3387 fOriginal.AddAt(tpctrack,nitstracks);
3391 // fill temporary arrays
3393 for (Int_t itrack=0;itrack<ntracks;itrack++){
3394 AliESDtrack * esdtrack = event->GetTrack(itrack);
3395 Int_t itsindex = itsmap[itrack];
3396 AliITStrackMI *original = (AliITStrackMI*)fOriginal.At(itsmap[itrack]);
3397 if (!original) continue;
3398 AliITStrackMI *bestConst = 0;
3399 AliITStrackMI *bestLong = 0;
3400 AliITStrackMI *best = 0;
3403 TObjArray * array = (TObjArray*) fTrackHypothesys.At(itsindex);
3404 Int_t hentries = (array==0) ? 0 : array->GetEntriesFast();
3405 // Get best track with vertex constrain
3406 for (Int_t ih=0;ih<hentries;ih++){
3407 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
3408 if (!trackh->fConstrain) continue;
3409 if (!bestConst) bestConst = trackh;
3410 if (trackh->fN>5.0){
3411 bestConst = trackh; // full track - with minimal chi2
3414 if (trackh->fN+trackh->fNDeadZone<=bestConst->fN+bestConst->fNDeadZone) continue;
3418 // Get best long track without vertex constrain and best track without vertex constrain
3419 for (Int_t ih=0;ih<hentries;ih++){
3420 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
3421 if (trackh->fConstrain) continue;
3422 if (!best) best = trackh;
3423 if (!bestLong) bestLong = trackh;
3424 if (trackh->fN>5.0){
3425 bestLong = trackh; // full track - with minimal chi2
3428 if (trackh->fN+trackh->fNDeadZone<=bestLong->fN+bestLong->fNDeadZone) continue;
3433 bestLong = original;
3435 trackat0 = *bestLong;
3436 Double_t xx,yy,zz,alpha;
3437 bestLong->GetGlobalXYZat(bestLong->GetX(),xx,yy,zz);
3438 alpha = TMath::ATan2(yy,xx);
3439 trackat0.Propagate(alpha,0);
3440 // calculate normalized distances to the vertex
3442 if ( bestLong->fN>3 ){
3443 dist[itsindex] = trackat0.fP0;
3444 norm[itsindex] = TMath::Sqrt(trackat0.fC00);
3445 normdist0[itsindex] = TMath::Abs(trackat0.fP0/norm[itsindex]);
3446 normdist1[itsindex] = TMath::Abs((trackat0.fP1-primvertex[2])/TMath::Sqrt(trackat0.fC11));
3447 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
3450 if (bestConst&&bestConst->fN+bestConst->fNDeadZone>4.5){
3451 dist[itsindex] = bestConst->fD[0];
3452 norm[itsindex] = bestConst->fDnorm[0];
3453 normdist0[itsindex] = TMath::Abs(bestConst->fD[0]/norm[itsindex]);
3454 normdist1[itsindex] = TMath::Abs(bestConst->fD[0]/norm[itsindex]);
3455 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
3457 dist[itsindex] = trackat0.fP0;
3458 norm[itsindex] = TMath::Sqrt(trackat0.fC00);
3459 normdist0[itsindex] = TMath::Abs(trackat0.fP0/norm[itsindex]);
3460 normdist1[itsindex] = TMath::Abs((trackat0.fP1-primvertex[2])/TMath::Sqrt(trackat0.fC11));
3461 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
3462 if (TMath::Abs(trackat0.fP3)>1.1){
3463 if (normdist[itsindex]<10) forbidden[itsindex]=kTRUE;
3468 //-----------------------------------------------------------
3469 //Forbid primary track candidates -
3471 //treetr->SetAlias("forbidden0","Tr0.fN<4&&Tr1.fN+Tr1.fNDeadZone>4.5");
3472 //treetr->SetAlias("forbidden1","ND<3&&Tr1.fN+Tr1.fNDeadZone>5.5");
3473 //treetr->SetAlias("forbidden2","ND<2&&Tr1.fClIndex[0]>0&&Tr1.fClIndex[0]>0");
3474 //treetr->SetAlias("forbidden3","ND<1&&Tr1.fClIndex[0]>0");
3475 //treetr->SetAlias("forbidden4","ND<4&&Tr1.fNormChi2[0]<2");
3476 //treetr->SetAlias("forbidden5","ND<5&&Tr1.fNormChi2[0]<1");
3477 //-----------------------------------------------------------
3479 if (bestLong->fN<4 && bestConst->fN+bestConst->fNDeadZone>4.5) forbidden[itsindex]=kTRUE;
3480 if (normdist[itsindex]<3 && bestConst->fN+bestConst->fNDeadZone>5.5) forbidden[itsindex]=kTRUE;
3481 if (normdist[itsindex]<2 && bestConst->fClIndex[0]>0 && bestConst->fClIndex[1]>0 ) forbidden[itsindex]=kTRUE;
3482 if (normdist[itsindex]<1 && bestConst->fClIndex[0]>0) forbidden[itsindex]=kTRUE;
3483 if (normdist[itsindex]<4 && bestConst->fNormChi2[0]<2) forbidden[itsindex]=kTRUE;
3484 if (normdist[itsindex]<5 && bestConst->fNormChi2[0]<1) forbidden[itsindex]=kTRUE;
3485 if (bestConst->fNormChi2[0]<2.5) {
3486 minPointAngle[itsindex]= 0.9999;
3487 maxr[itsindex] = 10;
3491 //forbid daughter kink candidates
3493 if (esdtrack->GetKinkIndex(0)>0) forbidden[itsindex] = kTRUE;
3494 Bool_t isElectron = kTRUE;
3496 esdtrack->GetESDpid(pid);
3497 for (Int_t i=1;i<5;i++){
3498 if (pid[0]<pid[i]) isElectron= kFALSE;
3501 forbidden[itsindex]=kFALSE;
3502 normdist[itsindex]+=4;
3505 // Causality cuts in TPC volume
3507 if (esdtrack->GetTPCdensity(0,10) >0.6) maxr[itsindex] = TMath::Min(Float_t(110),maxr[itsindex]);
3508 if (esdtrack->GetTPCdensity(10,30)>0.6) maxr[itsindex] = TMath::Min(Float_t(120),maxr[itsindex]);
3509 if (esdtrack->GetTPCdensity(20,40)>0.6) maxr[itsindex] = TMath::Min(Float_t(130),maxr[itsindex]);
3510 if (esdtrack->GetTPCdensity(30,50)>0.6) maxr[itsindex] = TMath::Min(Float_t(140),maxr[itsindex]);
3512 if (esdtrack->GetTPCdensity(0,60)<0.4&&bestLong->fN<3) minr[itsindex]=100;
3518 "Tr1.="<<((bestConst)? bestConst:dummy)<<
3520 "Tr3.="<<&trackat0<<
3522 "Dist="<<dist[itsindex]<<
3523 "ND0="<<normdist0[itsindex]<<
3524 "ND1="<<normdist1[itsindex]<<
3525 "ND="<<normdist[itsindex]<<
3526 "Pz="<<primvertex[2]<<
3527 "Forbid="<<forbidden[itsindex]<<
3531 trackarray.AddAt(best,itsindex);
3532 trackarrayc.AddAt(bestConst,itsindex);
3533 trackarrayl.AddAt(bestLong,itsindex);
3534 new (&helixes[itsindex]) AliHelix(*best);
3539 // first iterration of V0 finder
3541 for (Int_t iesd0=0;iesd0<ntracks;iesd0++){
3542 Int_t itrack0 = itsmap[iesd0];
3543 if (forbidden[itrack0]) continue;
3544 AliITStrackMI * btrack0 = (AliITStrackMI*)trackarray.At(itrack0);
3545 if (!btrack0) continue;
3546 if (btrack0->fP4>0) continue;
3547 AliITStrackMI *trackc0 = (AliITStrackMI*)trackarrayc.At(itrack0);
3549 for (Int_t iesd1=0;iesd1<ntracks;iesd1++){
3550 Int_t itrack1 = itsmap[iesd1];
3551 if (forbidden[itrack1]) continue;
3553 AliITStrackMI * btrack1 = (AliITStrackMI*)trackarray.At(itrack1);
3554 if (!btrack1) continue;
3555 if (btrack1->fP4<0) continue;
3556 Bool_t isGold = kFALSE;
3557 if (TMath::Abs(TMath::Abs(btrack0->GetLabel())-TMath::Abs(btrack1->GetLabel()))==1){
3560 AliITStrackMI *trackc1 = (AliITStrackMI*)trackarrayc.At(itrack1);
3561 AliHelix &h1 = helixes[itrack0];
3562 AliHelix &h2 = helixes[itrack1];
3564 // find linear distance
3569 Double_t phase[2][2],radius[2];
3570 Int_t points = h1.GetRPHIintersections(h2, phase, radius);
3571 if (points==0) continue;
3572 Double_t delta[2]={1000,1000};
3574 h1.ParabolicDCA(h2,phase[0][0],phase[0][1],radius[0],delta[0]);
3576 if (radius[1]<rmin) rmin = radius[1];
3577 h1.ParabolicDCA(h2,phase[1][0],phase[1][1],radius[1],delta[1]);
3579 rmin = TMath::Sqrt(rmin);
3580 Double_t distance = 0;
3581 Double_t radiusC = 0;
3583 if (delta[0]<delta[1]){
3584 distance = TMath::Sqrt(delta[0]);
3585 radiusC = TMath::Sqrt(radius[0]);
3587 distance = TMath::Sqrt(delta[1]);
3588 radiusC = TMath::Sqrt(radius[1]);
3591 if (radiusC<TMath::Max(minr[itrack0],minr[itrack1])) continue;
3592 if (radiusC>TMath::Min(maxr[itrack0],maxr[itrack1])) continue;
3593 Float_t maxDist = TMath::Min(kMaxDist,Float_t(kMaxDist0+radiusC*kMaxDist1));
3594 if (distance>maxDist) continue;
3595 Float_t pointAngle = h1.GetPointAngle(h2,phase[iphase],primvertex);
3596 if (pointAngle<TMath::Max(minPointAngle[itrack0],minPointAngle[itrack1])) continue;
3599 // Double_t distance = TestV0(h1,h2,pvertex,rmin);
3601 // if (distance>maxDist) continue;
3602 // if (pvertex->GetRr()<kMinR) continue;
3603 // if (pvertex->GetRr()>kMaxR) continue;
3604 AliITStrackMI * track0=btrack0;
3605 AliITStrackMI * track1=btrack1;
3606 // if (pvertex->GetRr()<3.5){
3608 //use longest tracks inside the pipe
3609 track0 = (AliITStrackMI*)trackarrayl.At(itrack0);
3610 track1 = (AliITStrackMI*)trackarrayl.At(itrack1);
3614 pvertex->SetM(*track0);
3615 pvertex->SetP(*track1);
3616 pvertex->Update(primvertex);
3617 if (pvertex->GetRr()<kMinR) continue;
3618 if (pvertex->GetRr()>kMaxR) continue;
3619 if (pvertex->GetPointAngle()<kMinPointAngle) continue;
3620 if (pvertex->GetDist2()>maxDist) continue;
3621 pvertex->SetLab(0,track0->GetLabel());
3622 pvertex->SetLab(1,track1->GetLabel());
3625 AliITStrackMI * htrackc0 = trackc0 ? trackc0:dummy;
3626 AliITStrackMI * htrackc1 = trackc1 ? trackc1:dummy;
3630 TObjArray * array0b = (TObjArray*)fBestHypothesys.At(itrack0);
3631 if (!array0b&&pvertex->GetRr()<40 && TMath::Abs(track0->fP3)<1.1)
3632 FollowProlongationTree((AliITStrackMI*)fOriginal.At(itrack0),itrack0, kFALSE);
3633 TObjArray * array1b = (TObjArray*)fBestHypothesys.At(itrack1);
3634 if (!array1b&&pvertex->GetRr()<40 && TMath::Abs(track1->fP3)<1.1)
3635 FollowProlongationTree((AliITStrackMI*)fOriginal.At(itrack1),itrack1, kFALSE);
3637 AliITStrackMI * track0b = (AliITStrackMI*)fOriginal.At(itrack0);
3638 AliITStrackMI * track1b = (AliITStrackMI*)fOriginal.At(itrack1);
3639 AliITStrackMI * track0l = (AliITStrackMI*)fOriginal.At(itrack0);
3640 AliITStrackMI * track1l = (AliITStrackMI*)fOriginal.At(itrack1);
3642 Float_t minchi2before0=16;
3643 Float_t minchi2before1=16;
3644 Float_t minchi2after0 =16;
3645 Float_t minchi2after1 =16;
3646 Int_t maxLayer = GetNearestLayer(pvertex->GetXrp());
3648 if (array0b) for (Int_t i=0;i<5;i++){
3649 // best track after vertex
3650 AliITStrackMI * btrack = (AliITStrackMI*)array0b->At(i);
3651 if (!btrack) continue;
3652 if (btrack->fN>track0l->fN) track0l = btrack;
3653 if (btrack->fX<pvertex->GetRr()-2) {
3654 if (maxLayer>i+2 && btrack->fN==(6-i)&&i<2){
3657 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
3659 if (!btrack->fClIndex[ilayer]){
3663 sumchi2+=btrack->fDy[ilayer]*btrack->fDy[ilayer]/(btrack->fSigmaY[ilayer]*btrack->fSigmaY[ilayer]);
3664 sumchi2+=btrack->fDz[ilayer]*btrack->fDz[ilayer]/(btrack->fSigmaZ[ilayer]*btrack->fSigmaZ[ilayer]);
3668 if (sumchi2<minchi2before0) minchi2before0=sumchi2;
3670 continue; //safety space - Geo manager will give exact layer
3673 minchi2after0 = btrack->fNormChi2[i];
3676 if (array1b) for (Int_t i=0;i<5;i++){
3677 // best track after vertex
3678 AliITStrackMI * btrack = (AliITStrackMI*)array1b->At(i);
3679 if (!btrack) continue;
3680 if (btrack->fN>track1l->fN) track1l = btrack;
3681 if (btrack->fX<pvertex->GetRr()-2){
3682 if (maxLayer>i+2&&btrack->fN==(6-i)&&(i<2)){
3685 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
3687 if (!btrack->fClIndex[ilayer]){
3691 sumchi2+=btrack->fDy[ilayer]*btrack->fDy[ilayer]/(btrack->fSigmaY[ilayer]*btrack->fSigmaY[ilayer]);
3692 sumchi2+=btrack->fDz[ilayer]*btrack->fDz[ilayer]/(btrack->fSigmaZ[ilayer]*btrack->fSigmaZ[ilayer]);
3696 if (sumchi2<minchi2before1) minchi2before1=sumchi2;
3698 continue; //safety space - Geo manager will give exact layer
3701 minchi2after1 = btrack->fNormChi2[i];
3705 // position resolution - used for DCA cut
3706 Float_t sigmad = track0b->fC00+track0b->fC11+track1b->fC00+track1b->fC11+
3707 (track0b->fX-pvertex->GetRr())*(track0b->fX-pvertex->GetRr())*(track0b->fC22+track0b->fC33)+
3708 (track1b->fX-pvertex->GetRr())*(track1b->fX-pvertex->GetRr())*(track1b->fC22+track1b->fC33);
3709 sigmad =TMath::Sqrt(sigmad)+0.04;
3710 if (pvertex->GetRr()>50){
3711 Double_t cov0[15],cov1[15];
3712 track0b->fESDtrack->GetInnerExternalCovariance(cov0);
3713 track1b->fESDtrack->GetInnerExternalCovariance(cov1);
3714 sigmad = cov0[0]+cov0[2]+cov1[0]+cov1[2]+
3715 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov0[5]+cov0[9])+
3716 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov1[5]+cov1[9]);
3717 sigmad =TMath::Sqrt(sigmad)+0.05;
3721 vertex2.SetM(*track0b);
3722 vertex2.SetP(*track1b);
3723 vertex2.Update(primvertex);
3724 if (vertex2.GetDist2()<=pvertex->GetDist2()&&(vertex2.GetPointAngle()>=pvertex->GetPointAngle())){
3725 pvertex->SetM(*track0b);
3726 pvertex->SetP(*track1b);
3727 pvertex->Update(primvertex);
3729 pvertex->SetDistSigma(sigmad);
3730 pvertex->SetDistNorm(pvertex->GetDist2()/sigmad);
3732 // define likelihhod and causalities
3734 Float_t pa0=1, pa1=1, pb0=0.26, pb1=0.26;
3736 if (pvertex->GetAnglep()[2]>0.2){
3737 pb0 = TMath::Exp(-TMath::Min(normdist[itrack0],Float_t(16.))/12.);
3738 pb1 = TMath::Exp(-TMath::Min(normdist[itrack1],Float_t(16.))/12.);
3740 pvertex->SetChi2Before(normdist[itrack0]);
3741 pvertex->SetChi2After(normdist[itrack1]);
3742 pvertex->SetNAfter(0);
3743 pvertex->SetNBefore(0);
3745 pvertex->SetChi2Before(minchi2before0);
3746 pvertex->SetChi2After(minchi2before1);
3747 if (pvertex->GetAnglep()[2]>0.2){
3748 pb0 = TMath::Exp(-TMath::Min(minchi2before0,Float_t(16))/12.);
3749 pb1 = TMath::Exp(-TMath::Min(minchi2before1,float_t(16))/12.);
3751 pvertex->SetNAfter(maxLayer);
3752 pvertex->SetNBefore(maxLayer);
3754 if (pvertex->GetRr()<90){
3755 pa0 *= TMath::Min(track0->fESDtrack->GetTPCdensity(0,60),Float_t(1.));
3756 pa1 *= TMath::Min(track1->fESDtrack->GetTPCdensity(0,60),Float_t(1.));
3758 if (pvertex->GetRr()<20){
3759 pa0 *= (0.2+TMath::Exp(-TMath::Min(minchi2after0,Float_t(16))/8.))/1.2;
3760 pa1 *= (0.2+TMath::Exp(-TMath::Min(minchi2after1,Float_t(16))/8.))/1.2;
3763 pvertex->SetCausality(pb0,pb1,pa0,pa1);
3765 // Likelihood calculations - apply cuts
3767 Bool_t v0OK = kTRUE;
3768 Float_t p12 = pvertex->GetParamP()->GetParameter()[4]*pvertex->GetParamP()->GetParameter()[4];
3769 p12 += pvertex->GetParamM()->GetParameter()[4]*pvertex->GetParamM()->GetParameter()[4];
3770 p12 = TMath::Sqrt(p12); // "mean" momenta
3771 Float_t sigmap0 = 0.0001+0.001/(0.1+pvertex->GetRr());
3772 Float_t sigmap = 0.5*sigmap0*(0.6+0.4*p12); // "resolution: of point angle - as a function of radius and momenta
3774 Float_t causalityA = (1.0-pvertex->GetCausalityP()[0])*(1.0-pvertex->GetCausalityP()[1]);
3775 Float_t causalityB = TMath::Sqrt(TMath::Min(pvertex->GetCausalityP()[2],Float_t(0.7))*
3776 TMath::Min(pvertex->GetCausalityP()[3],Float_t(0.7)));
3778 Float_t likelihood0 = (TMath::Exp(-pvertex->GetDistNorm())+0.1) *(pvertex->GetDist2()<0.5)*(pvertex->GetDistNorm()<5);
3780 Float_t likelihood1 = TMath::Exp(-(1.0001-pvertex->GetPointAngle())/sigmap)+
3781 0.4*TMath::Exp(-(1.0001-pvertex->GetPointAngle())/(4.*sigmap))+
3782 0.4*TMath::Exp(-(1.0001-pvertex->GetPointAngle())/(8.*sigmap))+
3783 0.1*TMath::Exp(-(1.0001-pvertex->GetPointAngle())/0.01);
3785 if (causalityA<kCausality0Cut) v0OK = kFALSE;
3786 if (TMath::Sqrt(likelihood0*likelihood1)<kLikelihood01Cut) v0OK = kFALSE;
3787 if (likelihood1<kLikelihood1Cut) v0OK = kFALSE;
3788 if (TMath::Power(likelihood0*likelihood1*causalityB,0.33)<kCombinedCut) v0OK = kFALSE;
3793 Bool_t gold = TMath::Abs(TMath::Abs(track0->GetLabel())-TMath::Abs(track1->GetLabel()))==1;
3795 "Tr0.="<<track0<< //best without constrain
3796 "Tr1.="<<track1<< //best without constrain
3797 "Tr0B.="<<track0b<< //best without constrain after vertex
3798 "Tr1B.="<<track1b<< //best without constrain after vertex
3799 "Tr0C.="<<htrackc0<< //best with constrain if exist
3800 "Tr1C.="<<htrackc1<< //best with constrain if exist
3801 "Tr0L.="<<track0l<< //longest best
3802 "Tr1L.="<<track1l<< //longest best
3803 "Esd0.="<<track0->fESDtrack<< // esd track0 params
3804 "Esd1.="<<track1->fESDtrack<< // esd track1 params
3805 "V0.="<<pvertex<< //vertex properties
3806 "V0b.="<<&vertex2<< //vertex properties at "best" track
3807 "ND0="<<normdist[itrack0]<< //normalize distance for track0
3808 "ND1="<<normdist[itrack1]<< //normalize distance for track1
3810 // "RejectBase="<<rejectBase<< //rejection in First itteration
3816 //if (rejectBase) continue;
3818 pvertex->SetStatus(0);
3819 // if (rejectBase) {
3820 // pvertex->SetStatus(-100);
3822 if (pvertex->GetPointAngle()>kMinPointAngle2) {
3824 AliV0vertex vertexjuri(*track0,*track1);
3825 vertexjuri.SetESDindexes(track0->fESDtrack->GetID(),track1->fESDtrack->GetID());
3826 pvertex->SetESDindexes(track0->fESDtrack->GetID(),track1->fESDtrack->GetID());
3827 event->AddV0(&vertexjuri);
3828 pvertex->SetStatus(100);
3830 event->AddV0MI(pvertex);
3836 // delete temporary arrays
3838 delete[] minPointAngle;