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 AliITSRecPoint 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>
35 #include "AliITSRecPoint.h"
36 #include "AliITSgeomTGeo.h"
37 #include "AliITStrackerMI.h"
38 #include "AliTrackPointArray.h"
39 #include "AliAlignObj.h"
41 ClassImp(AliITStrackerMI)
45 AliITStrackerMI::AliITSlayer AliITStrackerMI::fgLayers[kMaxLayer]; // ITS layers
46 AliITStrackerMI::AliITStrackerMI():AliTracker(),
56 fLastLayerToTrackTo(0),
64 AliITStrackerMI::AliITStrackerMI(const AliITSgeomTGeo *geom) : AliTracker(),
74 fLastLayerToTrackTo(kLastLayerToTrackTo),
78 //--------------------------------------------------------------------
79 //This is the AliITStrackerMI constructor
80 //--------------------------------------------------------------------
82 AliWarning("\"geom\" is actually a dummy argument !");
88 for (Int_t i=1; i<kMaxLayer+1; i++) {
89 Int_t nlad=AliITSgeomTGeo::GetNLadders(i);
90 Int_t ndet=AliITSgeomTGeo::GetNDetectors(i);
92 Double_t xyz[3], &x=xyz[0], &y=xyz[1], &z=xyz[2];
93 AliITSgeomTGeo::GetOrigTranslation(i,1,1,xyz);
94 Double_t poff=TMath::ATan2(y,x);
96 Double_t r=TMath::Sqrt(x*x + y*y);
98 AliITSgeomTGeo::GetOrigTranslation(i,1,2,xyz);
99 r += TMath::Sqrt(x*x + y*y);
100 AliITSgeomTGeo::GetOrigTranslation(i,2,1,xyz);
101 r += TMath::Sqrt(x*x + y*y);
102 AliITSgeomTGeo::GetOrigTranslation(i,2,2,xyz);
103 r += TMath::Sqrt(x*x + y*y);
106 new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet);
108 for (Int_t j=1; j<nlad+1; j++) {
109 for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors
110 TGeoHMatrix m; AliITSgeomTGeo::GetOrigMatrix(i,j,k,m);
111 Double_t *xyz=m.GetTranslation(), x=xyz[0], y=xyz[1];
112 Double_t *rot=m.GetRotationMatrix();
114 Double_t phi=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
116 if (i==1) phi+=TMath::Pi();
118 if (phi<0) phi+=TMath::TwoPi();
119 else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi();
121 Double_t cp=TMath::Cos(phi), sp=TMath::Sin(phi);
122 Double_t r=x*cp+y*sp;
124 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
125 new(&det) AliITSdetector(r,phi);
134 fConstraint[0]=1; fConstraint[1]=0;
136 Double_t xyz[]={kXV,kYV,kZV}, ers[]={kSigmaXV,kSigmaYV,kSigmaZV};
139 for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=kLayersNotToSkip[i];
140 fLastLayerToTrackTo=kLastLayerToTrackTo;
141 for (Int_t i=0;i<100000;i++){
142 fBestTrackIndex[i]=0;
145 fDebugStreamer = new TTreeSRedirector("ITSdebug.root");
149 AliITStrackerMI::AliITStrackerMI(const AliITStrackerMI &tracker):AliTracker(tracker),
151 fBestTrack(tracker.fBestTrack),
152 fTrackToFollow(tracker.fTrackToFollow),
153 fTrackHypothesys(tracker.fTrackHypothesys),
154 fBestHypothesys(tracker.fBestHypothesys),
155 fOriginal(tracker.fOriginal),
156 fCurrentEsdTrack(tracker.fCurrentEsdTrack),
157 fPass(tracker.fPass),
158 fAfterV0(tracker.fAfterV0),
159 fLastLayerToTrackTo(tracker.fLastLayerToTrackTo),
160 fCoeficients(tracker.fCoeficients),
162 fDebugStreamer(tracker.fDebugStreamer){
166 AliITStrackerMI & AliITStrackerMI::operator=(const AliITStrackerMI &tracker){
167 //Assignment operator
168 this->~AliITStrackerMI();
169 new(this) AliITStrackerMI(tracker);
174 AliITStrackerMI::~AliITStrackerMI()
179 if (fCoeficients) delete []fCoeficients;
180 if (fDebugStreamer) {
181 //fDebugStreamer->Close();
182 delete fDebugStreamer;
186 void AliITStrackerMI::SetLayersNotToSkip(Int_t *l) {
187 //--------------------------------------------------------------------
188 //This function set masks of the layers which must be not skipped
189 //--------------------------------------------------------------------
190 for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=l[i];
193 Int_t AliITStrackerMI::LoadClusters(TTree *cTree) {
194 //--------------------------------------------------------------------
195 //This function loads ITS clusters
196 //--------------------------------------------------------------------
197 TBranch *branch=cTree->GetBranch("ITSRecPoints");
199 Error("LoadClusters"," can't get the branch !\n");
203 TClonesArray dummy("AliITSRecPoint",10000), *clusters=&dummy;
204 branch->SetAddress(&clusters);
208 for (Int_t i=0; i<kMaxLayer; i++) {
209 Int_t ndet=fgLayers[i].GetNdetectors();
210 Int_t jmax = j + fgLayers[i].GetNladders()*ndet;
211 for (; j<jmax; j++) {
212 if (!cTree->GetEvent(j)) continue;
213 Int_t ncl=clusters->GetEntriesFast();
214 SignDeltas(clusters,GetZ());
216 AliITSRecPoint *c=(AliITSRecPoint*)clusters->UncheckedAt(ncl);
218 detector = c->GetDetectorIndex();
219 AliITSdetector &det=fgLayers[i].GetDetector(detector);
221 //Shift the cluster to the misaligned position (temporary solution)
222 Double_t x=det.GetR();
224 else if (i==1) x+=0.0075;
227 fgLayers[i].InsertCluster(new AliITSRecPoint(*c));
230 //add dead zone virtual "cluster"
232 for (Float_t ydead = 0; ydead < 1.31 ; ydead+=(i+1.)*0.018){
233 Int_t lab[4] = {0,0,0,detector};
234 Int_t info[3] = {0,0,0};
235 Float_t hit[5]={0,0,0.004/12.,0.001/12.,0};
236 if (i==0) hit[0] =ydead-0.4;
237 if (i==1) hit[0]=ydead-3.75;
239 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
240 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
242 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
243 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
245 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
246 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
248 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
249 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
251 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
252 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
254 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
255 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
261 fgLayers[i].ResetRoad(); //road defined by the cluster density
262 fgLayers[i].SortClusters();
268 void AliITStrackerMI::UnloadClusters() {
269 //--------------------------------------------------------------------
270 //This function unloads ITS clusters
271 //--------------------------------------------------------------------
272 for (Int_t i=0; i<kMaxLayer; i++) fgLayers[i].ResetClusters();
275 static Int_t CorrectForDeadZoneMaterial(AliITStrackMI *t) {
276 //--------------------------------------------------------------------
277 // Correction for the material between the TPC and the ITS
278 // (should it belong to the TPC code ?)
279 //--------------------------------------------------------------------
280 Double_t riw=80., diw=0.0053, x0iw=30; // TPC inner wall ?
281 Double_t rcd=61., dcd=0.0053, x0cd=30; // TPC "central drum" ?
282 Double_t yr=12.8, dr=0.03; // rods ?
283 Double_t zm=0.2, dm=0.40; // membrane
284 //Double_t rr=52., dr=0.19, x0r=24., yyr=7.77; //rails
285 Double_t rs=50., ds=0.001; // something belonging to the ITS (screen ?)
287 if (t->GetX() > riw) {
288 if (!t->PropagateTo(riw,diw,x0iw)) return 1;
289 if (TMath::Abs(t->GetY())>yr) t->CorrectForMaterial(dr);
290 if (TMath::Abs(t->GetZ())<zm) t->CorrectForMaterial(dm);
291 if (!t->PropagateTo(rcd,dcd,x0cd)) return 1;
292 //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z);
293 //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,dr,x0r);
294 if (!t->PropagateTo(rs,ds)) return 1;
295 } else if (t->GetX() < rs) {
296 if (!t->PropagateTo(rs,-ds)) return 1;
297 //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z);
298 //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,-dr,x0r);
299 if (!t->PropagateTo(rcd,-dcd,x0cd)) return 1;
300 if (!t->PropagateTo(riw+0.001,-diw,x0iw)) return 1;
302 ::Error("CorrectForDeadZoneMaterial","track is already in the dead zone !");
309 Int_t AliITStrackerMI::Clusters2Tracks(AliESD *event) {
310 //--------------------------------------------------------------------
311 // This functions reconstructs ITS tracks
312 // The clusters must be already loaded !
313 //--------------------------------------------------------------------
314 TObjArray itsTracks(15000);
316 fEsd = event; // store pointer to the esd
317 {/* Read ESD tracks */
318 Int_t nentr=event->GetNumberOfTracks();
319 Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr);
321 AliESDtrack *esd=event->GetTrack(nentr);
323 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue;
324 if (esd->GetStatus()&AliESDtrack::kTPCout) continue;
325 if (esd->GetStatus()&AliESDtrack::kITSin) continue;
326 if (esd->GetKinkIndex(0)>0) continue; //kink daughter
329 t=new AliITStrackMI(*esd);
330 } catch (const Char_t *msg) {
331 //Warning("Clusters2Tracks",msg);
335 //t->fD[0] = t->GetD(GetX(),GetY());
336 //t->fD[1] = t->GetZat(GetX())-GetZ();
337 t->GetDZ(GetX(),GetY(),GetZ(),t->GetDP()); //I.B.
338 Double_t vdist = TMath::Sqrt(t->GetD(0)*t->GetD(0)+t->GetD(1)*t->GetD(1));
339 if (t->GetMass()<0.13) t->SetMass(0.13957); // MI look to the esd - mass hypothesys !!!!!!!!!!!
341 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
343 if (esd->GetV0Index(0)>0 && t->GetD(0)<30){
344 //track - can be V0 according to TPC
347 if (TMath::Abs(t->GetD(0))>10) {
352 if (TMath::Abs(vdist)>20) {
356 if (TMath::Abs(1/t->Get1Pt())<0.120) {
361 if (CorrectForDeadZoneMaterial(t)!=0) {
362 //Warning("Clusters2Tracks",
363 // "failed to correct for the material in the dead zone !\n");
368 t->SetReconstructed(kFALSE);
369 itsTracks.AddLast(t);
370 fOriginal.AddLast(t);
372 } /* End Read ESD tracks */
376 Int_t nentr=itsTracks.GetEntriesFast();
377 fTrackHypothesys.Expand(nentr);
378 fBestHypothesys.Expand(nentr);
379 MakeCoeficients(nentr);
381 for (fPass=0; fPass<2; fPass++) {
382 Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
383 for (Int_t i=0; i<nentr; i++) {
384 // cerr<<fPass<<" "<<i<<'\r';
385 fCurrentEsdTrack = i;
386 AliITStrackMI *t=(AliITStrackMI*)itsTracks.UncheckedAt(i);
387 if (t==0) continue; //this track has been already tracked
388 if (t->GetReconstructed()&&(t->GetNUsed()<1.5)) continue; //this track was already "succesfully" reconstructed
389 //if ( (TMath::Abs(t->GetD(GetX(),GetY())) >3.) && fConstraint[fPass]) continue;
390 //if ( (TMath::Abs(t->GetZat(GetX())-GetZ())>3.) && fConstraint[fPass]) continue;
391 Float_t dz[2]; t->GetDZ(GetX(),GetY(),GetZ(),dz); //I.B.
392 if ( (TMath::Abs(dz[0])>3.) && fConstraint[fPass]) continue;
393 if ( (TMath::Abs(dz[1])>3.) && fConstraint[fPass]) continue;
395 Int_t tpcLabel=t->GetLabel(); //save the TPC track label
397 ResetTrackToFollow(*t);
399 FollowProlongationTree(t,i,fConstraint[fPass]);
401 SortTrackHypothesys(fCurrentEsdTrack,20,0); //MI change
403 AliITStrackMI * besttrack = GetBestHypothesys(fCurrentEsdTrack,t,15);
404 if (!besttrack) continue;
405 besttrack->SetLabel(tpcLabel);
406 // besttrack->CookdEdx();
408 besttrack->SetFakeRatio(1.);
409 CookLabel(besttrack,0.); //For comparison only
410 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
413 if ( besttrack->GetNumberOfClusters()<6 && fConstraint[fPass]) {
416 if (besttrack->fChi2MIP[0]+besttrack->fNUsed>3.5) continue;
417 if ( (TMath::Abs(besttrack->fD[0]*besttrack->fD[0]+besttrack->fD[1]*besttrack->fD[1])>0.1) && fConstraint[fPass]) continue;
418 //delete itsTracks.RemoveAt(i);
420 if (fConstraint[fPass]&&(!besttrack->IsGoldPrimary())) continue; //to be tracked also without vertex constrain
423 t->SetReconstructed(kTRUE);
426 GetBestHypothesysMIP(itsTracks);
429 //GetBestHypothesysMIP(itsTracks);
433 //GetBestHypothesysMIP(itsTracks);
437 Int_t entries = fTrackHypothesys.GetEntriesFast();
438 for (Int_t ientry=0;ientry<entries;ientry++){
439 TObjArray * array =(TObjArray*)fTrackHypothesys.UncheckedAt(ientry);
440 if (array) array->Delete();
441 delete fTrackHypothesys.RemoveAt(ientry);
444 fTrackHypothesys.Delete();
445 fBestHypothesys.Delete();
447 delete []fCoeficients;
449 Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk);
455 Int_t AliITStrackerMI::PropagateBack(AliESD *event) {
456 //--------------------------------------------------------------------
457 // This functions propagates reconstructed ITS tracks back
458 // The clusters must be loaded !
459 //--------------------------------------------------------------------
460 Int_t nentr=event->GetNumberOfTracks();
461 Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
464 for (Int_t i=0; i<nentr; i++) {
465 AliESDtrack *esd=event->GetTrack(i);
467 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
468 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
472 t=new AliITStrackMI(*esd);
473 } catch (const Char_t *msg) {
474 //Warning("PropagateBack",msg);
478 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
480 ResetTrackToFollow(*t);
482 // propagete to vertex [SR, GSI 17.02.2003]
483 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
484 if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {
485 if (fTrackToFollow.PropagateToVertex(event->GetVertex())) {
486 fTrackToFollow.StartTimeIntegral();
488 fTrackToFollow.PropagateTo(3.,-0.0028,65.19);
491 fTrackToFollow.ResetCovariance(10.); fTrackToFollow.ResetClusters();
492 if (RefitAt(49.,&fTrackToFollow,t)) {
493 if (CorrectForDeadZoneMaterial(&fTrackToFollow)!=0) {
494 //Warning("PropagateBack",
495 // "failed to correct for the material in the dead zone !\n");
499 fTrackToFollow.SetLabel(t->GetLabel());
500 //fTrackToFollow.CookdEdx();
501 CookLabel(&fTrackToFollow,0.); //For comparison only
502 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
503 //UseClusters(&fTrackToFollow);
509 Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk);
514 Int_t AliITStrackerMI::RefitInward(AliESD *event) {
515 //--------------------------------------------------------------------
516 // This functions refits ITS tracks using the
517 // "inward propagated" TPC tracks
518 // The clusters must be loaded !
519 //--------------------------------------------------------------------
521 Int_t nentr=event->GetNumberOfTracks();
522 Info("RefitInward", "Number of ESD tracks: %d\n", nentr);
525 for (Int_t i=0; i<nentr; i++) {
526 AliESDtrack *esd=event->GetTrack(i);
528 if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
529 if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
530 if (esd->GetStatus()&AliESDtrack::kTPCout)
531 if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
535 t=new AliITStrackMI(*esd);
536 } catch (const Char_t *msg) {
537 //Warning("RefitInward",msg);
541 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
542 if (CorrectForDeadZoneMaterial(t)!=0) {
543 //Warning("RefitInward",
544 // "failed to correct for the material in the dead zone !\n");
549 ResetTrackToFollow(*t);
550 fTrackToFollow.ResetClusters();
552 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
553 fTrackToFollow.ResetCovariance(10.);
556 if (RefitAt(3.7, &fTrackToFollow, t,kTRUE)) {
557 fTrackToFollow.SetLabel(t->GetLabel());
558 // fTrackToFollow.CookdEdx();
559 CookdEdx(&fTrackToFollow);
561 CookLabel(&fTrackToFollow,0.0); //For comparison only
563 if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {//The beam pipe
564 AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack();
565 esdTrack->UpdateTrackParams(&fTrackToFollow,AliESDtrack::kITSrefit);
566 Float_t r[3]={0.,0.,0.};
568 esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD);
575 Info("RefitInward","Number of refitted tracks: %d\n",ntrk);
580 AliCluster *AliITStrackerMI::GetCluster(Int_t index) const {
581 //--------------------------------------------------------------------
582 // Return pointer to a given cluster
583 //--------------------------------------------------------------------
584 Int_t l=(index & 0xf0000000) >> 28;
585 Int_t c=(index & 0x0fffffff) >> 00;
586 return fgLayers[l].GetCluster(c);
589 #include "TGeoManager.h"
590 #include "TGeoMatrix.h"
591 #include "TGeoPhysicalNode.h"
593 Bool_t AliITStrackerMI::GetTrackPoint(Int_t index, AliTrackPoint& p) const {
595 // Get track space point with index i
597 Int_t l=(index & 0xf0000000) >> 28;
598 Int_t c=(index & 0x0fffffff) >> 00;
599 AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
600 Int_t idet = cl->GetDetectorIndex();
602 const char* name = AliAlignObj::SymName((AliAlignObj::ELayerID)
603 (l+AliAlignObj::kFirstLayer), idet);
604 TGeoPNEntry *mapPN = gGeoManager->GetAlignableEntry(name);
606 if (!mapPN) return kFALSE;
607 TGeoPhysicalNode *node = mapPN->GetPhysicalNode();
609 gGeoManager->MakeAlignablePN(name);
610 node = mapPN->GetPhysicalNode();
612 if (!node) return kFALSE;
613 TGeoHMatrix* matrix = node->GetMatrix();
614 if (!matrix) return kFALSE;
617 // Calculate the global coordinates
619 Double_t localCoord[] = {cl->GetDetLocalX(), 0, cl->GetDetLocalZ()};
620 // LG AliAlignObj makes life simple but keep in mind that alignable
621 // LG volume doesn't mean sensitive volume. There might be a shift
622 // LG between the 2, has it is here for the SPD :
623 if (l<2) localCoord[1] = 0.01;
624 // LG !!! Check for this when the new geometry comes !!!
625 Double_t globalCoord[3] = {0};
626 matrix->LocalToMaster(localCoord, globalCoord);
627 Float_t xyz[3]= {globalCoord[0], globalCoord[1], globalCoord[2]};
630 // Calculate the cov matrix
632 TGeoRotation rotMatrix(*matrix);
633 TGeoRotation rotMatrixTr(rotMatrix.Inverse());
634 Double_t sigmaArray[] = {cl->GetSigmaY2(),0,0, 0,0,0, 0,0,cl->GetSigmaZ2()};
635 TGeoRotation sigmMatrix;
636 sigmMatrix.SetMatrix( sigmaArray );
637 sigmMatrix.MultiplyBy(&rotMatrixTr, kFALSE);
638 sigmMatrix.MultiplyBy(&rotMatrix, kTRUE);
639 const Double_t *globalSigma = sigmMatrix.GetRotationMatrix();
640 Float_t cov[6]= { globalSigma[0], globalSigma[1], globalSigma[2],
641 globalSigma[4], globalSigma[5],
644 p.SetXYZ(xyz[0],xyz[1],xyz[2],cov);
645 AliAlignObj::ELayerID iLayer = AliAlignObj::kInvalidLayer;
648 iLayer = AliAlignObj::kSPD1;
651 iLayer = AliAlignObj::kSPD2;
654 iLayer = AliAlignObj::kSDD1;
657 iLayer = AliAlignObj::kSDD2;
660 iLayer = AliAlignObj::kSSD1;
663 iLayer = AliAlignObj::kSSD2;
666 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
669 UShort_t volid = AliAlignObj::LayerToVolUID(iLayer,idet);
670 p.SetVolumeID((UShort_t)volid);
674 void AliITStrackerMI::FollowProlongationTree(AliITStrackMI * otrack, Int_t esdindex, Bool_t constrain)
676 //--------------------------------------------------------------------
677 // Follow prolongation tree
678 //--------------------------------------------------------------------
680 AliESDtrack * esd = otrack->GetESDtrack();
681 if (esd->GetV0Index(0)>0){
683 // TEMPORARY SOLLUTION: map V0 indexes to point to proper track
684 // mapping of esd track is different as its track in Containers
685 // Need something more stable
686 // Indexes are set back againg to the ESD track indexes in UpdateTPCV0
687 for (Int_t i=0;i<3;i++){
688 Int_t index = esd->GetV0Index(i);
690 AliESDv0 * vertex = fEsd->GetV0(index);
691 if (vertex->GetStatus()<0) continue; // rejected V0
693 if (esd->GetSign()>0) {
694 vertex->SetIndex(0,esdindex);
697 vertex->SetIndex(1,esdindex);
701 TObjArray *bestarray = (TObjArray*)fBestHypothesys.At(esdindex);
703 bestarray = new TObjArray(5);
704 fBestHypothesys.AddAt(bestarray,esdindex);
708 //setup tree of the prolongations
710 static AliITStrackMI tracks[7][100];
711 AliITStrackMI *currenttrack;
712 static AliITStrackMI currenttrack1;
713 static AliITStrackMI currenttrack2;
714 static AliITStrackMI backuptrack;
716 Int_t nindexes[7][100];
717 Float_t normalizedchi2[100];
718 for (Int_t ilayer=0;ilayer<6;ilayer++) ntracks[ilayer]=0;
719 otrack->SetNSkipped(0);
720 new (&(tracks[6][0])) AliITStrackMI(*otrack);
722 for (Int_t i=0;i<7;i++) nindexes[i][0]=0;
725 // follow prolongations
726 for (Int_t ilayer=5;ilayer>=0;ilayer--){
728 AliITSlayer &layer=fgLayers[ilayer];
729 Double_t r=layer.GetR();
735 for (Int_t itrack =0;itrack<ntracks[ilayer+1];itrack++){
737 if (ntracks[ilayer]>=100) break;
738 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0) nskipped++;
739 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2.) nused++;
740 if (ntracks[ilayer]>15+ilayer){
741 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0 && nskipped>4+ilayer) continue;
742 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2. && nused>3) continue;
745 new(¤ttrack1) AliITStrackMI(tracks[ilayer+1][nindexes[ilayer+1][itrack]]);
746 if (ilayer==3 || ilayer==1) {
747 Double_t rs=0.5*(fgLayers[ilayer+1].GetR() + r);
748 Double_t d=0.0034, x0=38.6;
749 if (ilayer==1) {rs=9.; d=0.0097; x0=42;}
750 if (!currenttrack1.PropagateTo(rs,d,x0)) {
755 //find intersection with layer
757 if (!currenttrack1.GetGlobalXYZat(r,x,y,z)) {
760 Double_t phi=TMath::ATan2(y,x);
761 Int_t idet=layer.FindDetectorIndex(phi,z);
765 //propagate to the intersection
766 const AliITSdetector &det=layer.GetDetector(idet);
768 new(¤ttrack2) AliITStrackMI(currenttrack1);
769 if (!currenttrack1.Propagate(phi,det.GetR())) {
772 currenttrack2.Propagate(phi,det.GetR()); //
773 currenttrack1.SetDetectorIndex(idet);
774 currenttrack2.SetDetectorIndex(idet);
778 Double_t dz=7.5*TMath::Sqrt(currenttrack1.GetSigmaZ2() + 16.*kSigmaZ2[ilayer]);
779 Double_t dy=7.5*TMath::Sqrt(currenttrack1.GetSigmaY2() + 16.*kSigmaY2[ilayer]);
781 Bool_t isBoundary=kFALSE;
782 if (currenttrack1.GetY()-dy< det.GetYmin()+0.2) isBoundary = kTRUE;
783 if (currenttrack1.GetY()+dy> det.GetYmax()-0.2) isBoundary = kTRUE;
784 if (currenttrack1.GetZ()-dz< det.GetZmin()+0.2) isBoundary = kTRUE;
785 if (currenttrack1.GetZ()+dz> det.GetZmax()-0.2) isBoundary = kTRUE;
787 if (isBoundary){ // track at boundary between detectors
788 Float_t maxtgl = TMath::Abs(currenttrack1.GetTgl());
789 if (maxtgl>1) maxtgl=1;
790 dz = TMath::Sqrt(dz*dz+0.25*maxtgl*maxtgl);
792 Float_t maxsnp = TMath::Abs(currenttrack1.GetSnp());
793 if (maxsnp>0.95) continue;
794 //if (maxsnp>0.5) maxsnp=0.5;
795 dy=TMath::Sqrt(dy*dy+0.25*maxsnp*maxsnp);
798 Double_t zmin=currenttrack1.GetZ() - dz;
799 Double_t zmax=currenttrack1.GetZ() + dz;
800 Double_t ymin=currenttrack1.GetY() + r*phi - dy;
801 Double_t ymax=currenttrack1.GetY() + r*phi + dy;
802 layer.SelectClusters(zmin,zmax,ymin,ymax);
804 // loop over all possible prolongations
806 Double_t msz=1./((currenttrack1.GetSigmaZ2() + 16.*kSigmaZ2[ilayer]));
807 Double_t msy=1./((currenttrack1.GetSigmaY2() + 16.*kSigmaY2[ilayer]));
815 const AliITSRecPoint *c=0; Int_t ci=-1;
816 Double_t chi2=12345.;
818 currenttrack = ¤ttrack1;
819 while ((c=layer.GetNextCluster(ci))!=0) {
820 if (ntracks[ilayer]>95) break; //space for skipped clusters
821 Bool_t change =kFALSE;
822 if (c->GetQ()==0 && (deadzone==1)) continue;
823 Int_t idet=c->GetDetectorIndex();
824 if (currenttrack->GetDetectorIndex()!=idet) {
825 const AliITSdetector &det=layer.GetDetector(idet);
827 if (!currenttrack2.GetProlongationFast(det.GetPhi(),det.GetR(),y,z)) continue;
828 Float_t pz = (z - c->GetZ()) , py=(y - c->GetY());
829 if (pz*pz*msz+py*py*msy>1.) continue;
831 new (&backuptrack) AliITStrackMI(currenttrack2);
833 currenttrack =¤ttrack2;
834 if (!currenttrack->Propagate(det.GetPhi(),det.GetR())) {
835 new (currenttrack) AliITStrackMI(backuptrack);
839 currenttrack->SetDetectorIndex(idet);
842 Float_t pz = (currenttrack->GetZ() - c->GetZ()) , py=(currenttrack->GetY() - c->GetY());
843 if (pz*pz*msz+py*py*msy>1.) continue;
846 chi2=GetPredictedChi2MI(currenttrack,c,ilayer);
847 if (chi2<kMaxChi2s[ilayer]){
848 if (c->GetQ()==0) deadzone=1; // take dead zone only once
849 if (ntracks[ilayer]>=100) continue;
850 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
851 updatetrack->SetClIndex(ilayer,0);
853 new (¤ttrack2) AliITStrackMI(backuptrack);
856 if (!UpdateMI(updatetrack,c,chi2,(ilayer<<28)+ci)) continue;
857 updatetrack->SetSampledEdx(c->GetQ(),updatetrack->GetNumberOfClusters()-1); //b.b.
860 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
861 updatetrack->SetDeadZoneProbability(GetDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
864 updatetrack->IncrementNUsed();
867 Double_t d=layer.GetThickness(updatetrack->GetY(),updatetrack->GetZ(),x0);
868 updatetrack->CorrectForMaterial(d,x0);
870 updatetrack->SetConstrain(constrain);
872 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
873 Double_t xyz[]={GetX(),GetY(),GetZ()};
874 Double_t ptfactor = 1;
875 Double_t ers[]={GetSigmaX()*ptfactor,GetSigmaY()*ptfactor,GetSigmaZ()};
876 Bool_t isPrim = kTRUE;
878 //updatetrack->fD[0] = updatetrack->GetD(GetX(),GetY());
879 //updatetrack->fD[1] = updatetrack->GetZat(GetX())-GetZ();
880 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
881 if ( TMath::Abs(updatetrack->GetD(0)/(1.+ilayer))>0.4 || TMath::Abs(updatetrack->GetD(1)/(1.+ilayer))>0.4) isPrim=kFALSE;
883 if (isPrim) updatetrack->Improve(d,xyz,ers);
884 } //apply vertex constrain
886 } // create new hypothesy
887 } // loop over possible cluster prolongation
888 // if (constrain&&itrack<2&¤ttrack1.fNSkipped==0 && deadzone==0){
889 if (constrain&&itrack<2&¤ttrack1.GetNSkipped()==0 && deadzone==0&&ntracks[ilayer]<100){
890 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
891 vtrack->SetClIndex(ilayer,0);
893 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
894 Double_t xyz[]={GetX(),GetY(),GetZ()};
895 Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
896 vtrack->Improve(d,xyz,ers);
897 vtrack->IncrementNSkipped();
901 if (constrain&&itrack<1&&TMath::Abs(currenttrack1.GetTgl())>1.1){ //big theta -- for low mult. runs
902 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
903 vtrack->SetClIndex(ilayer,0);
905 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
906 Double_t xyz[]={GetX(),GetY(),GetZ()};
907 Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
908 vtrack->Improve(d,xyz,ers);
909 vtrack->SetNDeadZone(vtrack->GetNDeadZone()+1);
914 } //loop over track candidates
920 for (Int_t itrack=0;itrack<ntracks[ilayer];itrack++){
921 normalizedchi2[itrack] = NormalizedChi2(&tracks[ilayer][itrack],ilayer);
922 if ( normalizedchi2[itrack]<3+0.5*ilayer) golds++;
923 if (ilayer>4) accepted++;
925 if ( constrain && normalizedchi2[itrack]<kMaxNormChi2C[ilayer]+1) accepted++;
926 if (!constrain && normalizedchi2[itrack]<kMaxNormChi2NonC[ilayer]+1) accepted++;
929 TMath::Sort(ntracks[ilayer],normalizedchi2,nindexes[ilayer],kFALSE);
930 ntracks[ilayer] = TMath::Min(accepted,7+2*ilayer);
931 if (ntracks[ilayer]<golds+2+ilayer) ntracks[ilayer]=TMath::Min(golds+2+ilayer,accepted);
932 if (ntracks[ilayer]>90) ntracks[ilayer]=90;
934 //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]);
935 Int_t max = constrain? 20: 5;
937 for (Int_t i=0;i<TMath::Min(max,ntracks[0]);i++) {
938 AliITStrackMI & track= tracks[0][nindexes[0][i]];
939 if (track.GetNumberOfClusters()<2) continue;
940 if (!constrain&&track.GetNormChi2(0)>7.)continue;
941 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
943 for (Int_t i=0;i<TMath::Min(2,ntracks[1]);i++) {
944 AliITStrackMI & track= tracks[1][nindexes[1][i]];
945 if (track.GetNumberOfClusters()<4) continue;
946 if (!constrain&&track.GetNormChi2(1)>7.)continue;
947 if (constrain) track.IncrementNSkipped();
949 track.SetD(0,track.GetD(GetX(),GetY()));
950 track.SetNSkipped(track.GetNSkipped()+4./(4.+8.*TMath::Abs(track.GetD(0))));
951 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
952 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
955 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
960 for (Int_t i=0;i<TMath::Min(2,ntracks[2]);i++) {
961 AliITStrackMI & track= tracks[2][nindexes[2][i]];
962 if (track.GetNumberOfClusters()<3) continue;
963 if (!constrain&&track.GetNormChi2(2)>7.)continue;
964 if (constrain) track.SetNSkipped(track.GetNSkipped()+2);
966 track.SetD(0,track.GetD(GetX(),GetY()));
967 track.SetNSkipped(track.GetNSkipped()+7./(7.+8.*TMath::Abs(track.GetD(0))));
968 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
969 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
972 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
978 // register best tracks - important for V0 finder
980 for (Int_t ilayer=0;ilayer<5;ilayer++){
981 if (ntracks[ilayer]==0) continue;
982 AliITStrackMI & track= tracks[ilayer][nindexes[ilayer][0]];
983 if (track.GetNumberOfClusters()<1) continue;
985 bestarray->AddAt(new AliITStrackMI(track),ilayer);
989 // update TPC V0 information
991 if (otrack->GetESDtrack()->GetV0Index(0)>0){
992 Float_t fprimvertex[3]={GetX(),GetY(),GetZ()};
993 for (Int_t i=0;i<3;i++){
994 Int_t index = otrack->GetESDtrack()->GetV0Index(i);
996 AliV0 * vertex = (AliV0*)fEsd->GetV0(index);
997 if (vertex->GetStatus()<0) continue; // rejected V0
999 if (otrack->GetSign()>0) {
1000 vertex->SetIndex(0,esdindex);
1003 vertex->SetIndex(1,esdindex);
1005 //find nearest layer with track info
1006 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
1007 Int_t nearestold = GetNearestLayer(xrp); //I.B.
1008 Int_t nearest = nearestold;
1009 for (Int_t ilayer =nearest;ilayer<8;ilayer++){
1010 if (ntracks[nearest]==0){
1015 AliITStrackMI & track= tracks[nearest][nindexes[nearest][0]];
1016 if (nearestold<5&&nearest<5){
1017 Bool_t accept = track.GetNormChi2(nearest)<10;
1019 if (track.GetSign()>0) {
1020 vertex->SetParamP(track);
1021 vertex->Update(fprimvertex);
1022 // vertex->SetIndex(0,track.fESDtrack->GetID());
1023 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1025 vertex->SetParamN(track);
1026 vertex->Update(fprimvertex);
1027 //vertex->SetIndex(1,track.fESDtrack->GetID());
1028 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1030 vertex->SetStatus(vertex->GetStatus()+1);
1032 // vertex->SetStatus(-2); // reject V0 - not enough clusters
1035 // if (nearestold>3){
1036 // Int_t indexlayer = (ntracks[0]>0)? 0:1;
1037 // if (ntracks[indexlayer]>0){
1038 // AliITStrackMI & track= tracks[indexlayer][nindexes[indexlayer][0]];
1039 // if (track.GetNumberOfClusters()>4&&track.fNormChi2[indexlayer]<4){
1040 // vertex->SetStatus(-1); // reject V0 - clusters before
1049 AliITStrackerMI::AliITSlayer & AliITStrackerMI::GetLayer(Int_t layer) const
1051 //--------------------------------------------------------------------
1054 return fgLayers[layer];
1057 AliITStrackerMI::AliITSlayer::AliITSlayer():
1082 //--------------------------------------------------------------------
1083 //default AliITSlayer constructor
1084 //--------------------------------------------------------------------
1085 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
1086 fClusterWeight[i]=0;
1087 fClusterTracks[0][i]=-1;
1088 fClusterTracks[1][i]=-1;
1089 fClusterTracks[2][i]=-1;
1090 fClusterTracks[3][i]=-1;
1094 AliITStrackerMI::AliITSlayer::
1095 AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd):
1120 //--------------------------------------------------------------------
1121 //main AliITSlayer constructor
1122 //--------------------------------------------------------------------
1123 fDetectors=new AliITSdetector[fNladders*fNdetectors];
1124 fRoad=2*fR*TMath::Sqrt(3.14/1.);//assuming that there's only one cluster
1127 AliITStrackerMI::AliITSlayer::AliITSlayer(const AliITSlayer& layer):
1129 fPhiOffset(layer.fPhiOffset),
1130 fNladders(layer.fNladders),
1131 fZOffset(layer.fZOffset),
1132 fNdetectors(layer.fNdetectors),
1133 fDetectors(layer.fDetectors),
1138 fClustersCs(layer.fClustersCs),
1139 fClusterIndexCs(layer.fClusterIndexCs),
1143 fCurrentSlice(layer.fCurrentSlice),
1150 fAccepted(layer.fAccepted),
1156 AliITStrackerMI::AliITSlayer::~AliITSlayer() {
1157 //--------------------------------------------------------------------
1158 // AliITSlayer destructor
1159 //--------------------------------------------------------------------
1160 delete[] fDetectors;
1161 for (Int_t i=0; i<fN; i++) delete fClusters[i];
1162 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
1163 fClusterWeight[i]=0;
1164 fClusterTracks[0][i]=-1;
1165 fClusterTracks[1][i]=-1;
1166 fClusterTracks[2][i]=-1;
1167 fClusterTracks[3][i]=-1;
1171 void AliITStrackerMI::AliITSlayer::ResetClusters() {
1172 //--------------------------------------------------------------------
1173 // This function removes loaded clusters
1174 //--------------------------------------------------------------------
1175 for (Int_t i=0; i<fN; i++) delete fClusters[i];
1176 for (Int_t i=0; i<kMaxClusterPerLayer;i++){
1177 fClusterWeight[i]=0;
1178 fClusterTracks[0][i]=-1;
1179 fClusterTracks[1][i]=-1;
1180 fClusterTracks[2][i]=-1;
1181 fClusterTracks[3][i]=-1;
1188 void AliITStrackerMI::AliITSlayer::ResetWeights() {
1189 //--------------------------------------------------------------------
1190 // This function reset weights of the clusters
1191 //--------------------------------------------------------------------
1192 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
1193 fClusterWeight[i]=0;
1194 fClusterTracks[0][i]=-1;
1195 fClusterTracks[1][i]=-1;
1196 fClusterTracks[2][i]=-1;
1197 fClusterTracks[3][i]=-1;
1199 for (Int_t i=0; i<fN;i++) {
1200 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster(i);
1201 if (cl&&cl->IsUsed()) cl->Use();
1206 void AliITStrackerMI::AliITSlayer::ResetRoad() {
1207 //--------------------------------------------------------------------
1208 // This function calculates the road defined by the cluster density
1209 //--------------------------------------------------------------------
1211 for (Int_t i=0; i<fN; i++) {
1212 if (TMath::Abs(fClusters[i]->GetZ())<fR) n++;
1214 //if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n);
1215 if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n);
1219 Int_t AliITStrackerMI::AliITSlayer::InsertCluster(AliITSRecPoint *c) {
1220 //--------------------------------------------------------------------
1221 //This function adds a cluster to this layer
1222 //--------------------------------------------------------------------
1223 if (fN==kMaxClusterPerLayer) {
1224 ::Error("InsertCluster","Too many clusters !\n");
1230 AliITSdetector &det=GetDetector(c->GetDetectorIndex());
1231 if (c->GetY()<det.GetYmin()) det.SetYmin(c->GetY());
1232 if (c->GetY()>det.GetYmax()) det.SetYmax(c->GetY());
1233 if (c->GetZ()<det.GetZmin()) det.SetZmin(c->GetZ());
1234 if (c->GetZ()>det.GetZmax()) det.SetZmax(c->GetZ());
1239 void AliITStrackerMI::AliITSlayer::SortClusters()
1244 AliITSRecPoint **clusters = new AliITSRecPoint*[fN];
1245 Float_t *z = new Float_t[fN];
1246 Int_t * index = new Int_t[fN];
1248 for (Int_t i=0;i<fN;i++){
1249 z[i] = fClusters[i]->GetZ();
1251 TMath::Sort(fN,z,index,kFALSE);
1252 for (Int_t i=0;i<fN;i++){
1253 clusters[i] = fClusters[index[i]];
1256 for (Int_t i=0;i<fN;i++){
1257 fClusters[i] = clusters[i];
1258 fZ[i] = fClusters[i]->GetZ();
1259 AliITSdetector &det=GetDetector(fClusters[i]->GetDetectorIndex());
1260 Double_t y=fR*det.GetPhi() + fClusters[i]->GetY();
1261 if (y>2.*fR*TMath::Pi()) y -= 2.*fR*TMath::Pi();
1271 for (Int_t i=0;i<fN;i++){
1272 if (fY[i]<fYB[0]) fYB[0]=fY[i];
1273 if (fY[i]>fYB[1]) fYB[1]=fY[i];
1274 fClusterIndex[i] = i;
1278 fDy5 = (fYB[1]-fYB[0])/5.;
1279 fDy10 = (fYB[1]-fYB[0])/10.;
1280 fDy20 = (fYB[1]-fYB[0])/20.;
1281 for (Int_t i=0;i<6;i++) fN5[i] =0;
1282 for (Int_t i=0;i<11;i++) fN10[i]=0;
1283 for (Int_t i=0;i<21;i++) fN20[i]=0;
1285 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;}
1286 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;}
1287 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;}
1290 for (Int_t i=0;i<fN;i++)
1291 for (Int_t irot=-1;irot<=1;irot++){
1292 Float_t curY = fY[i]+irot*TMath::TwoPi()*fR;
1294 for (Int_t slice=0; slice<6;slice++){
1295 if (fBy5[slice][0]<curY && curY<fBy5[slice][1]&&fN5[slice]<kMaxClusterPerLayer5){
1296 fClusters5[slice][fN5[slice]] = fClusters[i];
1297 fY5[slice][fN5[slice]] = curY;
1298 fZ5[slice][fN5[slice]] = fZ[i];
1299 fClusterIndex5[slice][fN5[slice]]=i;
1304 for (Int_t slice=0; slice<11;slice++){
1305 if (fBy10[slice][0]<curY && curY<fBy10[slice][1]&&fN10[slice]<kMaxClusterPerLayer10){
1306 fClusters10[slice][fN10[slice]] = fClusters[i];
1307 fY10[slice][fN10[slice]] = curY;
1308 fZ10[slice][fN10[slice]] = fZ[i];
1309 fClusterIndex10[slice][fN10[slice]]=i;
1314 for (Int_t slice=0; slice<21;slice++){
1315 if (fBy20[slice][0]<curY && curY<fBy20[slice][1]&&fN20[slice]<kMaxClusterPerLayer20){
1316 fClusters20[slice][fN20[slice]] = fClusters[i];
1317 fY20[slice][fN20[slice]] = curY;
1318 fZ20[slice][fN20[slice]] = fZ[i];
1319 fClusterIndex20[slice][fN20[slice]]=i;
1326 // consistency check
1328 for (Int_t i=0;i<fN-1;i++){
1334 for (Int_t slice=0;slice<21;slice++)
1335 for (Int_t i=0;i<fN20[slice]-1;i++){
1336 if (fZ20[slice][i]>fZ20[slice][i+1]){
1345 Int_t AliITStrackerMI::AliITSlayer::FindClusterIndex(Float_t z) const {
1346 //--------------------------------------------------------------------
1347 // This function returns the index of the nearest cluster
1348 //--------------------------------------------------------------------
1351 if (fCurrentSlice<0) {
1360 if (ncl==0) return 0;
1361 Int_t b=0, e=ncl-1, m=(b+e)/2;
1362 for (; b<e; m=(b+e)/2) {
1363 // if (z > fClusters[m]->GetZ()) b=m+1;
1364 if (z > zcl[m]) b=m+1;
1371 void AliITStrackerMI::AliITSlayer::
1372 SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1373 //--------------------------------------------------------------------
1374 // This function sets the "window"
1375 //--------------------------------------------------------------------
1377 Double_t circle=2*TMath::Pi()*fR;
1378 fYmin = ymin; fYmax =ymax;
1379 Float_t ymiddle = (fYmin+fYmax)*0.5;
1380 if (ymiddle<fYB[0]) {fYmin+=circle; fYmax+=circle;ymiddle+=circle;}
1382 if (ymiddle>fYB[1]) {fYmin-=circle; fYmax-=circle;ymiddle-=circle;}
1387 fClustersCs = fClusters;
1388 fClusterIndexCs = fClusterIndex;
1394 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy20){
1395 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy20);
1396 if (slice<0) slice=0;
1397 if (slice>20) slice=20;
1398 Bool_t isOK = (fYmin>fBy20[slice][0]&&fYmax<fBy20[slice][1]);
1400 fCurrentSlice=slice;
1401 fClustersCs = fClusters20[fCurrentSlice];
1402 fClusterIndexCs = fClusterIndex20[fCurrentSlice];
1403 fYcs = fY20[fCurrentSlice];
1404 fZcs = fZ20[fCurrentSlice];
1405 fNcs = fN20[fCurrentSlice];
1410 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy10){
1411 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy10);
1412 if (slice<0) slice=0;
1413 if (slice>10) slice=10;
1414 Bool_t isOK = (fYmin>fBy10[slice][0]&&fYmax<fBy10[slice][1]);
1416 fCurrentSlice=slice;
1417 fClustersCs = fClusters10[fCurrentSlice];
1418 fClusterIndexCs = fClusterIndex10[fCurrentSlice];
1419 fYcs = fY10[fCurrentSlice];
1420 fZcs = fZ10[fCurrentSlice];
1421 fNcs = fN10[fCurrentSlice];
1426 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy5){
1427 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy5);
1428 if (slice<0) slice=0;
1429 if (slice>5) slice=5;
1430 Bool_t isOK = (fYmin>fBy5[slice][0]&&fYmax<fBy5[slice][1]);
1432 fCurrentSlice=slice;
1433 fClustersCs = fClusters5[fCurrentSlice];
1434 fClusterIndexCs = fClusterIndex5[fCurrentSlice];
1435 fYcs = fY5[fCurrentSlice];
1436 fZcs = fZ5[fCurrentSlice];
1437 fNcs = fN5[fCurrentSlice];
1441 fI=FindClusterIndex(zmin); fZmax=zmax;
1442 fImax = TMath::Min(FindClusterIndex(zmax)+1,fNcs);
1450 Int_t AliITStrackerMI::AliITSlayer::
1451 FindDetectorIndex(Double_t phi, Double_t z) const {
1452 //--------------------------------------------------------------------
1453 //This function finds the detector crossed by the track
1454 //--------------------------------------------------------------------
1455 Double_t dphi=-(phi-fPhiOffset);
1456 if (dphi < 0) dphi += 2*TMath::Pi();
1457 else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi();
1458 Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5);
1459 if (np>=fNladders) np-=fNladders;
1460 if (np<0) np+=fNladders;
1462 Double_t dz=fZOffset-z;
1463 Int_t nz=Int_t(dz*(fNdetectors-1)*0.5/fZOffset+0.5);
1464 if (nz>=fNdetectors) return -1;
1465 if (nz<0) return -1;
1467 return np*fNdetectors + nz;
1471 const AliITSRecPoint *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci){
1472 //--------------------------------------------------------------------
1473 // This function returns clusters within the "window"
1474 //--------------------------------------------------------------------
1476 if (fCurrentSlice<0){
1477 Double_t rpi2 = 2.*fR*TMath::Pi();
1478 for (Int_t i=fI; i<fImax; i++) {
1480 if (fYmax<y) y -= rpi2;
1481 if (fYmin>y) y += rpi2;
1482 if (y<fYmin) continue;
1483 if (y>fYmax) continue;
1484 if (fClusters[i]->GetQ()==0&&fSkip==2) continue;
1487 return fClusters[i];
1491 for (Int_t i=fI; i<fImax; i++) {
1492 if (fYcs[i]<fYmin) continue;
1493 if (fYcs[i]>fYmax) continue;
1494 if (fClustersCs[i]->GetQ()==0&&fSkip==2) continue;
1495 ci=fClusterIndexCs[i];
1497 return fClustersCs[i];
1505 Double_t AliITStrackerMI::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0)
1507 //--------------------------------------------------------------------
1508 //This function returns the layer thickness at this point (units X0)
1509 //--------------------------------------------------------------------
1512 if (43<fR&&fR<45) { //SSD2
1515 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1516 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1517 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1518 for (Int_t i=0; i<12; i++) {
1519 if (TMath::Abs(z-3.9*(i+0.5))<0.15) {
1520 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1524 if (TMath::Abs(z+3.9*(i+0.5))<0.15) {
1525 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1529 if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1530 if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1533 if (37<fR&&fR<41) { //SSD1
1536 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1537 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1538 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1539 for (Int_t i=0; i<11; i++) {
1540 if (TMath::Abs(z-3.9*i)<0.15) {
1541 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1545 if (TMath::Abs(z+3.9*i)<0.15) {
1546 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1550 if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1551 if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1554 if (13<fR&&fR<26) { //SDD
1557 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1559 if (TMath::Abs(y-1.80)<0.55) {
1561 for (Int_t j=0; j<20; j++) {
1562 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1563 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1566 if (TMath::Abs(y+1.80)<0.55) {
1568 for (Int_t j=0; j<20; j++) {
1569 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1570 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1574 for (Int_t i=0; i<4; i++) {
1575 if (TMath::Abs(z-7.3*i)<0.60) {
1577 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1580 if (TMath::Abs(z+7.3*i)<0.60) {
1582 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1587 if (6<fR&&fR<8) { //SPD2
1588 Double_t dd=0.0063; x0=21.5;
1590 if (TMath::Abs(y-3.08)>0.5) d+=dd;
1591 //if (TMath::Abs(y-3.08)>0.45) d+=dd;
1592 if (TMath::Abs(y-3.03)<0.10) {d+=0.014;}
1594 if (3<fR&&fR<5) { //SPD1
1595 Double_t dd=0.0063; x0=21.5;
1597 if (TMath::Abs(y+0.21)>0.6) d+=dd;
1598 //if (TMath::Abs(y+0.21)>0.45) d+=dd;
1599 if (TMath::Abs(y+0.10)<0.10) {d+=0.014;}
1605 Double_t AliITStrackerMI::GetEffectiveThickness(Double_t y,Double_t z) const
1607 //--------------------------------------------------------------------
1608 //Returns the thickness between the current layer and the vertex (units X0)
1609 //--------------------------------------------------------------------
1610 Double_t d=0.0028*3*3; //beam pipe
1613 Double_t xn=fgLayers[fI].GetR();
1614 for (Int_t i=0; i<fI; i++) {
1615 Double_t xi=fgLayers[i].GetR();
1616 d+=fgLayers[i].GetThickness(y,z,x0)*xi*xi;
1625 Double_t xi=0.5*(fgLayers[3].GetR()+fgLayers[4].GetR());
1632 Int_t AliITStrackerMI::AliITSlayer::InRoad() const {
1633 //--------------------------------------------------------------------
1634 // This function returns number of clusters within the "window"
1635 //--------------------------------------------------------------------
1637 for (Int_t i=fI; i<fN; i++) {
1638 const AliITSRecPoint *c=fClusters[i];
1639 if (c->GetZ() > fZmax) break;
1640 if (c->IsUsed()) continue;
1641 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
1642 Double_t y=fR*det.GetPhi() + c->GetY();
1644 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
1645 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
1647 if (y<fYmin) continue;
1648 if (y>fYmax) continue;
1654 Bool_t AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *t,
1655 const AliITStrackMI *c, Bool_t extra) {
1656 //--------------------------------------------------------------------
1657 // This function refits the track "t" at the position "x" using
1658 // the clusters from "c"
1659 // If "extra"==kTRUE,
1660 // the clusters from overlapped modules get attached to "t"
1661 //--------------------------------------------------------------------
1662 Int_t index[kMaxLayer];
1664 for (k=0; k<kMaxLayer; k++) index[k]=-1;
1665 Int_t nc=c->GetNumberOfClusters();
1666 for (k=0; k<nc; k++) {
1667 Int_t idx=c->GetClusterIndex(k),nl=(idx&0xf0000000)>>28;
1671 Int_t from, to, step;
1672 if (xx > t->GetX()) {
1673 from=0; to=kMaxLayer;
1676 from=kMaxLayer-1; to=-1;
1680 for (Int_t i=from; i != to; i += step) {
1681 AliITSlayer &layer=fgLayers[i];
1682 Double_t r=layer.GetR();
1685 Double_t hI=i-0.5*step;
1686 if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) {
1687 Double_t rs=0.5*(fgLayers[i-step].GetR() + r);
1688 Double_t d=0.0034, x0=38.6;
1689 if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;}
1690 if (!t->PropagateTo(rs,-step*d,x0)) {
1696 // remember old position [SR, GSI 18.02.2003]
1697 Double_t oldX=0., oldY=0., oldZ=0.;
1698 if (t->IsStartedTimeIntegral() && step==1) {
1699 t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ);
1704 if (!t->GetGlobalXYZat(r,x,y,z)) {
1707 Double_t phi=TMath::ATan2(y,x);
1708 Int_t idet=layer.FindDetectorIndex(phi,z);
1712 const AliITSdetector &det=layer.GetDetector(idet);
1714 if (!t->Propagate(phi,det.GetR())) {
1717 t->SetDetectorIndex(idet);
1719 const AliITSRecPoint *cl=0;
1720 Double_t maxchi2=1000.*kMaxChi2;
1724 const AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(idx);
1726 if (idet != c->GetDetectorIndex()) {
1727 idet=c->GetDetectorIndex();
1728 const AliITSdetector &det=layer.GetDetector(idet);
1729 if (!t->Propagate(det.GetPhi(),det.GetR())) {
1732 t->SetDetectorIndex(idet);
1734 //Double_t chi2=t->GetPredictedChi2(c);
1735 Int_t layer = (idx & 0xf0000000) >> 28;;
1736 Double_t chi2=GetPredictedChi2MI(t,c,layer);
1747 //if (!t->Update(cl,maxchi2,idx)) {
1748 if (!UpdateMI(t,cl,maxchi2,idx)) {
1751 t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
1756 Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0);
1757 t->CorrectForMaterial(-step*d,x0);
1760 if (extra) { //search for extra clusters
1761 AliITStrackV2 tmp(*t);
1762 Double_t dz=4*TMath::Sqrt(tmp.GetSigmaZ2()+kSigmaZ2[i]);
1763 if (dz < 0.5*TMath::Abs(tmp.GetTgl())) dz=0.5*TMath::Abs(tmp.GetTgl());
1764 Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+kSigmaY2[i]);
1765 if (dy < 0.5*TMath::Abs(tmp.GetSnp())) dy=0.5*TMath::Abs(tmp.GetSnp());
1766 Double_t zmin=t->GetZ() - dz;
1767 Double_t zmax=t->GetZ() + dz;
1768 Double_t ymin=t->GetY() + phi*r - dy;
1769 Double_t ymax=t->GetY() + phi*r + dy;
1770 layer.SelectClusters(zmin,zmax,ymin,ymax);
1772 const AliITSRecPoint *c=0; Int_t ci=-1,cci=-1;
1773 Double_t maxchi2=1000.*kMaxChi2, tolerance=0.1;
1774 while ((c=layer.GetNextCluster(ci))!=0) {
1775 if (idet == c->GetDetectorIndex()) continue;
1777 const AliITSdetector &det=layer.GetDetector(c->GetDetectorIndex());
1779 if (!tmp.Propagate(det.GetPhi(),det.GetR())) continue;
1781 if (TMath::Abs(tmp.GetZ() - c->GetZ()) > tolerance) continue;
1782 if (TMath::Abs(tmp.GetY() - c->GetY()) > tolerance) continue;
1784 Double_t chi2=tmp.GetPredictedChi2(c);
1785 if (chi2<maxchi2) { maxchi2=chi2; cci=ci; }
1787 if (cci>=0) t->SetExtraCluster(i,(i<<28)+cci);
1790 // track time update [SR, GSI 17.02.2003]
1791 if (t->IsStartedTimeIntegral() && step==1) {
1792 Double_t newX, newY, newZ;
1793 t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
1794 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
1795 (oldZ-newZ)*(oldZ-newZ);
1796 t->AddTimeStep(TMath::Sqrt(dL2));
1802 if (!t->PropagateTo(xx,0.,0.)) return kFALSE;
1807 AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *t,const Int_t *clindex) {
1808 //--------------------------------------------------------------------
1809 // This function refits the track "t" at the position "x" using
1810 // the clusters from array
1811 //--------------------------------------------------------------------
1812 Int_t index[kMaxLayer];
1814 for (k=0; k<kMaxLayer; k++) index[k]=-1;
1816 for (k=0; k<kMaxLayer; k++) {
1817 index[k]=clindex[k];
1820 Int_t from, to, step;
1821 if (xx > t->GetX()) {
1822 from=0; to=kMaxLayer;
1825 from=kMaxLayer-1; to=-1;
1829 for (Int_t i=from; i != to; i += step) {
1830 AliITSlayer &layer=fgLayers[i];
1831 Double_t r=layer.GetR();
1832 if (step<0 && xx>r) break; //
1834 Double_t hI=i-0.5*step;
1835 if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) {
1836 Double_t rs=0.5*(fgLayers[i-step].GetR() + r);
1837 Double_t d=0.0034, x0=38.6;
1838 if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;}
1839 if (!t->PropagateTo(rs,-step*d,x0)) {
1845 // remember old position [SR, GSI 18.02.2003]
1846 Double_t oldX=0., oldY=0., oldZ=0.;
1847 if (t->IsStartedTimeIntegral() && step==1) {
1848 t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ);
1853 if (!t->GetGlobalXYZat(r,x,y,z)) {
1856 Double_t phi=TMath::ATan2(y,x);
1857 Int_t idet=layer.FindDetectorIndex(phi,z);
1861 const AliITSdetector &det=layer.GetDetector(idet);
1863 if (!t->Propagate(phi,det.GetR())) {
1866 t->SetDetectorIndex(idet);
1868 const AliITSRecPoint *cl=0;
1869 Double_t maxchi2=1000.*kMaxChi2;
1873 const AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(idx);
1875 if (idet != c->GetDetectorIndex()) {
1876 idet=c->GetDetectorIndex();
1877 const AliITSdetector &det=layer.GetDetector(idet);
1878 if (!t->Propagate(det.GetPhi(),det.GetR())) {
1881 t->SetDetectorIndex(idet);
1883 //Double_t chi2=t->GetPredictedChi2(c);
1884 Int_t layer = (idx & 0xf0000000) >> 28;;
1885 Double_t chi2=GetPredictedChi2MI(t,c,layer);
1896 if (t->GetNumberOfClusters()>2) {
1897 Double_t dz=4*TMath::Sqrt(t->GetSigmaZ2()+kSigmaZ2[i]);
1898 Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+kSigmaY2[i]);
1899 Double_t zmin=t->GetZ() - dz;
1900 Double_t zmax=t->GetZ() + dz;
1901 Double_t ymin=t->GetY() + phi*r - dy;
1902 Double_t ymax=t->GetY() + phi*r + dy;
1903 layer.SelectClusters(zmin,zmax,ymin,ymax);
1905 const AliITSRecPoint *c=0; Int_t ci=-1;
1906 while ((c=layer.GetNextCluster(ci))!=0) {
1907 if (idet != c->GetDetectorIndex()) continue;
1908 Double_t chi2=t->GetPredictedChi2(c);
1909 if (chi2<maxchi2) { cl=c; maxchi2=chi2; idx=ci; }
1914 //if (!t->Update(cl,maxchi2,idx)) {
1915 if (!UpdateMI(t,cl,maxchi2,idx)) {
1918 t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
1923 Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0);
1924 t->CorrectForMaterial(-step*d,x0);
1927 // track time update [SR, GSI 17.02.2003]
1928 if (t->IsStartedTimeIntegral() && step==1) {
1929 Double_t newX, newY, newZ;
1930 t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
1931 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
1932 (oldZ-newZ)*(oldZ-newZ);
1933 t->AddTimeStep(TMath::Sqrt(dL2));
1939 if (!t->PropagateTo(xx,0.,0.)) return kFALSE;
1943 Double_t AliITStrackerMI::GetNormalizedChi2(AliITStrackMI * track, Int_t mode)
1946 // calculate normalized chi2
1947 // return NormalizedChi2(track,0);
1950 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
1951 // track->fdEdxMismatch=0;
1952 Float_t dedxmismatch =0;
1953 Float_t *ny = GetNy(fCurrentEsdTrack), *nz = GetNz(fCurrentEsdTrack);
1955 for (Int_t i = 0;i<6;i++){
1956 if (track->GetClIndex(i)>0){
1957 Float_t cerry, cerrz;
1958 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1960 { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
1963 Float_t cchi2 = (track->GetDy(i)*track->GetDy(i)/cerry)+(track->GetDz(i)*track->GetDz(i)/cerrz);
1965 Float_t ratio = track->GetNormQ(i)/track->GetExpQ();
1967 cchi2+=(0.5-ratio)*10.;
1968 //track->fdEdxMismatch+=(0.5-ratio)*10.;
1969 dedxmismatch+=(0.5-ratio)*10.;
1973 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster( track->GetClIndex(i));
1974 Double_t delta = cl->GetNy()+cl->GetNz()-ny[i]-nz[i];
1975 if (delta>1) chi2 +=0.5*TMath::Min(delta/2,2.);
1976 if (i<2) chi2+=2*cl->GetDeltaProbability();
1982 if (TMath::Abs(track->GetdEdxMismatch()-dedxmismatch)>0.0001){
1983 track->SetdEdxMismatch(dedxmismatch);
1987 for (Int_t i = 0;i<4;i++){
1988 if (track->GetClIndex(i)>0){
1989 Float_t cerry, cerrz;
1990 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1991 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
1994 chi2+= (track->GetDy(i)*track->GetDy(i)/cerry);
1995 chi2+= (track->GetDz(i)*track->GetDz(i)/cerrz);
1999 for (Int_t i = 4;i<6;i++){
2000 if (track->GetClIndex(i)>0){
2001 Float_t cerry, cerrz;
2002 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2003 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
2006 Float_t cerryb, cerrzb;
2007 if (ny[i+6]>0) {cerryb = erry[i+6]; cerrzb=errz[i+6];}
2008 else { cerryb= track->GetSigmaY(i+6); cerrzb = track->GetSigmaZ(i+6);}
2011 chi2+= TMath::Min((track->GetDy(i+6)*track->GetDy(i+6)/cerryb),track->GetDy(i)*track->GetDy(i)/cerry);
2012 chi2+= TMath::Min((track->GetDz(i+6)*track->GetDz(i+6)/cerrzb),track->GetDz(i)*track->GetDz(i)/cerrz);
2017 if (track->GetESDtrack()->GetTPCsignal()>85){
2018 Float_t ratio = track->GetdEdx()/track->GetESDtrack()->GetTPCsignal();
2020 chi2+=(0.5-ratio)*5.;
2023 chi2+=(ratio-2.0)*3;
2027 Double_t match = TMath::Sqrt(track->GetChi22());
2028 if (track->GetConstrain()) match/=track->GetNumberOfClusters();
2029 if (!track->GetConstrain()) match/=track->GetNumberOfClusters()-2.;
2030 if (match<0) match=0;
2031 Float_t deadzonefactor = (track->GetNDeadZone()>0) ? 3*(1.1-track->GetDeadZoneProbability()):0.;
2032 Double_t normchi2 = 2*track->GetNSkipped()+match+deadzonefactor+(1+(2*track->GetNSkipped()+deadzonefactor)/track->GetNumberOfClusters())*
2033 (chi2)/TMath::Max(double(sum-track->GetNSkipped()),
2034 1./(1.+track->GetNSkipped()));
2040 Double_t AliITStrackerMI::GetMatchingChi2(AliITStrackMI * track1, AliITStrackMI * track2)
2043 // return matching chi2 between two tracks
2044 AliITStrackMI track3(*track2);
2045 track3.Propagate(track1->GetAlpha(),track1->GetX());
2047 vec(0,0)=track1->GetY() - track3.GetY();
2048 vec(1,0)=track1->GetZ() - track3.GetZ();
2049 vec(2,0)=track1->GetSnp() - track3.GetSnp();
2050 vec(3,0)=track1->GetTgl() - track3.GetTgl();
2051 vec(4,0)=track1->Get1Pt() - track3.Get1Pt();
2054 cov(0,0) = track1->GetSigmaY2()+track3.GetSigmaY2();
2055 cov(1,1) = track1->GetSigmaZ2()+track3.GetSigmaZ2();
2056 cov(2,2) = track1->GetSigmaSnp2()+track3.GetSigmaSnp2();
2057 cov(3,3) = track1->GetSigmaTgl2()+track3.GetSigmaTgl2();
2058 cov(4,4) = track1->GetSigma1Pt2()+track3.GetSigma1Pt2();
2060 cov(0,1)=cov(1,0) = track1->GetSigmaZY()+track3.GetSigmaZY();
2061 cov(0,2)=cov(2,0) = track1->GetSigmaSnpY()+track3.GetSigmaSnpY();
2062 cov(0,3)=cov(3,0) = track1->GetSigmaTglY()+track3.GetSigmaTglY();
2063 cov(0,4)=cov(4,0) = track1->GetSigma1PtY()+track3.GetSigma1PtY();
2065 cov(1,2)=cov(2,1) = track1->GetSigmaSnpZ()+track3.GetSigmaSnpZ();
2066 cov(1,3)=cov(3,1) = track1->GetSigmaTglZ()+track3.GetSigmaTglZ();
2067 cov(1,4)=cov(4,1) = track1->GetSigma1PtZ()+track3.GetSigma1PtZ();
2069 cov(2,3)=cov(3,2) = track1->GetSigmaTglSnp()+track3.GetSigmaTglSnp();
2070 cov(2,4)=cov(4,2) = track1->GetSigma1PtSnp()+track3.GetSigma1PtSnp();
2072 cov(3,4)=cov(4,3) = track1->GetSigma1PtTgl()+track3.GetSigma1PtTgl();
2075 TMatrixD vec2(cov,TMatrixD::kMult,vec);
2076 TMatrixD chi2(vec2,TMatrixD::kTransposeMult,vec);
2080 Double_t AliITStrackerMI::GetDeadZoneProbability(Double_t zpos, Double_t zerr)
2083 // return probability that given point - characterized by z position and error is in dead zone
2085 Double_t probability =0;
2086 Double_t absz = TMath::Abs(zpos);
2087 Double_t nearestz = (absz<2)? 0.:7.1;
2088 if (TMath::Abs(absz-nearestz)>0.25+3*zerr) return 0;
2089 Double_t zmin=0, zmax=0;
2091 zmin = -7.25; zmax = -6.95;
2094 zmin = 7.0; zmax =7.3;
2097 zmin = -0.75; zmax = 1.5;
2099 probability = (TMath::Erf((zpos-zmin)/zerr) - TMath::Erf((zpos-zmax)/zerr))*0.5;
2104 Double_t AliITStrackerMI::GetTruncatedChi2(AliITStrackMI * track, Float_t fac)
2107 // calculate normalized chi2
2109 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2111 for (Int_t i = 0;i<6;i++){
2112 if (TMath::Abs(track->GetDy(i))>0){
2113 chi2[i]= (track->GetDy(i)/erry[i])*(track->GetDy(i)/erry[i]);
2114 chi2[i]+= (track->GetDz(i)/errz[i])*(track->GetDz(i)/errz[i]);
2117 else{chi2[i]=10000;}
2120 TMath::Sort(6,chi2,index,kFALSE);
2121 Float_t max = float(ncl)*fac-1.;
2122 Float_t sumchi=0, sumweight=0;
2123 for (Int_t i=0;i<max+1;i++){
2124 Float_t weight = (i<max)?1.:(max+1.-i);
2125 sumchi+=weight*chi2[index[i]];
2128 Double_t normchi2 = sumchi/sumweight;
2133 Double_t AliITStrackerMI::GetInterpolatedChi2(AliITStrackMI * forwardtrack, AliITStrackMI * backtrack)
2136 // calculate normalized chi2
2137 // if (forwardtrack->fNUsed>0.3*float(forwardtrack->GetNumberOfClusters())) return 10000;
2140 for (Int_t i=0;i<6;i++){
2141 if ( (backtrack->GetSigmaY(i)<0.000000001) || (forwardtrack->GetSigmaY(i)<0.000000001)) continue;
2142 Double_t sy1 = forwardtrack->GetSigmaY(i);
2143 Double_t sz1 = forwardtrack->GetSigmaZ(i);
2144 Double_t sy2 = backtrack->GetSigmaY(i);
2145 Double_t sz2 = backtrack->GetSigmaZ(i);
2146 if (i<2){ sy2=1000.;sz2=1000;}
2148 Double_t dy0 = (forwardtrack->GetDy(i)/(sy1*sy1) +backtrack->GetDy(i)/(sy2*sy2))/(1./(sy1*sy1)+1./(sy2*sy2));
2149 Double_t dz0 = (forwardtrack->GetDz(i)/(sz1*sz1) +backtrack->GetDz(i)/(sz2*sz2))/(1./(sz1*sz1)+1./(sz2*sz2));
2151 Double_t nz0 = dz0*TMath::Sqrt((1./(sz1*sz1)+1./(sz2*sz2)));
2152 Double_t ny0 = dy0*TMath::Sqrt((1./(sy1*sy1)+1./(sy2*sy2)));
2154 res+= nz0*nz0+ny0*ny0;
2157 if (npoints>1) return
2158 TMath::Max(TMath::Abs(0.3*forwardtrack->Get1Pt())-0.5,0.)+
2159 //2*forwardtrack->fNUsed+
2160 res/TMath::Max(double(npoints-forwardtrack->GetNSkipped()),
2161 1./(1.+forwardtrack->GetNSkipped()));
2169 Float_t *AliITStrackerMI::GetWeight(Int_t index) {
2170 //--------------------------------------------------------------------
2171 // Return pointer to a given cluster
2172 //--------------------------------------------------------------------
2173 Int_t l=(index & 0xf0000000) >> 28;
2174 Int_t c=(index & 0x0fffffff) >> 00;
2175 return fgLayers[l].GetWeight(c);
2178 void AliITStrackerMI::RegisterClusterTracks(AliITStrackMI* track,Int_t id)
2180 //---------------------------------------------
2181 // register track to the list
2183 if (track->GetESDtrack()->GetKinkIndex(0)!=0) return; //don't register kink tracks
2186 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2187 Int_t index = track->GetClusterIndex(icluster);
2188 Int_t l=(index & 0xf0000000) >> 28;
2189 Int_t c=(index & 0x0fffffff) >> 00;
2190 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2191 for (Int_t itrack=0;itrack<4;itrack++){
2192 if (fgLayers[l].GetClusterTracks(itrack,c)<0){
2193 fgLayers[l].SetClusterTracks(itrack,c,id);
2199 void AliITStrackerMI::UnRegisterClusterTracks(AliITStrackMI* track, Int_t id)
2201 //---------------------------------------------
2202 // unregister track from the list
2203 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2204 Int_t index = track->GetClusterIndex(icluster);
2205 Int_t l=(index & 0xf0000000) >> 28;
2206 Int_t c=(index & 0x0fffffff) >> 00;
2207 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2208 for (Int_t itrack=0;itrack<4;itrack++){
2209 if (fgLayers[l].GetClusterTracks(itrack,c)==id){
2210 fgLayers[l].SetClusterTracks(itrack,c,-1);
2215 Float_t AliITStrackerMI::GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSRecPoint *clist[6])
2217 //-------------------------------------------------------------
2218 //get number of shared clusters
2219 //-------------------------------------------------------------
2221 for (Int_t i=0;i<6;i++) { list[i]=-1, clist[i]=0;}
2222 // mean number of clusters
2223 Float_t *ny = GetNy(id), *nz = GetNz(id);
2226 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2227 Int_t index = track->GetClusterIndex(icluster);
2228 Int_t l=(index & 0xf0000000) >> 28;
2229 Int_t c=(index & 0x0fffffff) >> 00;
2230 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2232 printf("problem\n");
2234 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2238 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
2239 if (l>2&&track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
2241 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2244 deltan = (cl->GetNz()-nz[l]);
2246 if (deltan>2.0) continue; // extended - highly probable shared cluster
2247 weight = 2./TMath::Max(3.+deltan,2.);
2249 for (Int_t itrack=0;itrack<4;itrack++){
2250 if (fgLayers[l].GetClusterTracks(itrack,c)>=0 && fgLayers[l].GetClusterTracks(itrack,c)!=id){
2252 clist[l] = (AliITSRecPoint*)GetCluster(index);
2258 track->SetNUsed(shared);
2262 Int_t AliITStrackerMI::GetOverlapTrack(AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6],Int_t overlist[6])
2265 // find first shared track
2267 // mean number of clusters
2268 Float_t *ny = GetNy(trackID), *nz = GetNz(trackID);
2270 for (Int_t i=0;i<6;i++) overlist[i]=-1;
2271 Int_t sharedtrack=100000;
2272 Int_t tracks[24],trackindex=0;
2273 for (Int_t i=0;i<24;i++) {tracks[i]=-1;}
2275 for (Int_t icluster=0;icluster<6;icluster++){
2276 if (clusterlist[icluster]<0) continue;
2277 Int_t index = clusterlist[icluster];
2278 Int_t l=(index & 0xf0000000) >> 28;
2279 Int_t c=(index & 0x0fffffff) >> 00;
2281 printf("problem\n");
2283 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2284 //if (l>3) continue;
2285 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2288 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
2289 if (l>2&&track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
2291 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2294 deltan = (cl->GetNz()-nz[l]);
2296 if (deltan>2.0) continue; // extended - highly probable shared cluster
2298 for (Int_t itrack=3;itrack>=0;itrack--){
2299 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2300 if (fgLayers[l].GetClusterTracks(itrack,c)!=trackID){
2301 tracks[trackindex] = fgLayers[l].GetClusterTracks(itrack,c);
2306 if (trackindex==0) return -1;
2308 sharedtrack = tracks[0];
2310 if (trackindex==2) sharedtrack =TMath::Min(tracks[0],tracks[1]);
2313 Int_t track[24], cluster[24];
2314 for (Int_t i=0;i<trackindex;i++){ track[i]=-1; cluster[i]=0;}
2317 for (Int_t i=0;i<trackindex;i++){
2318 if (tracks[i]<0) continue;
2319 track[index] = tracks[i];
2321 for (Int_t j=i+1;j<trackindex;j++){
2322 if (tracks[j]<0) continue;
2323 if (tracks[j]==tracks[i]){
2331 for (Int_t i=0;i<index;i++){
2332 if (cluster[index]>max) {
2333 sharedtrack=track[index];
2340 if (sharedtrack>=100000) return -1;
2342 // make list of overlaps
2344 for (Int_t icluster=0;icluster<6;icluster++){
2345 if (clusterlist[icluster]<0) continue;
2346 Int_t index = clusterlist[icluster];
2347 Int_t l=(index & 0xf0000000) >> 28;
2348 Int_t c=(index & 0x0fffffff) >> 00;
2349 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2350 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2352 if (cl->GetNy()>2) continue;
2353 if (cl->GetNz()>2) continue;
2356 if (cl->GetNy()>3) continue;
2357 if (cl->GetNz()>3) continue;
2360 for (Int_t itrack=3;itrack>=0;itrack--){
2361 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2362 if (fgLayers[l].GetClusterTracks(itrack,c)==sharedtrack){
2372 AliITStrackMI * AliITStrackerMI::GetBest2Tracks(Int_t trackID1, Int_t trackID2, Float_t th0, Float_t th1){
2374 // try to find track hypothesys without conflicts
2375 // with minimal chi2;
2376 TClonesArray *arr1 = (TClonesArray*)fTrackHypothesys.At(trackID1);
2377 Int_t entries1 = arr1->GetEntriesFast();
2378 TClonesArray *arr2 = (TClonesArray*)fTrackHypothesys.At(trackID2);
2379 if (!arr2) return (AliITStrackMI*) arr1->UncheckedAt(0);
2380 Int_t entries2 = arr2->GetEntriesFast();
2381 if (entries2<=0) return (AliITStrackMI*) arr1->UncheckedAt(0);
2383 AliITStrackMI * track10=(AliITStrackMI*) arr1->UncheckedAt(0);
2384 AliITStrackMI * track20=(AliITStrackMI*) arr2->UncheckedAt(0);
2385 if (TMath::Abs(1./track10->Get1Pt())>0.5+TMath::Abs(1/track20->Get1Pt())) return track10;
2387 for (Int_t itrack=0;itrack<entries1;itrack++){
2388 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
2389 UnRegisterClusterTracks(track,trackID1);
2392 for (Int_t itrack=0;itrack<entries2;itrack++){
2393 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
2394 UnRegisterClusterTracks(track,trackID2);
2398 Float_t maxconflicts=6;
2399 Double_t maxchi2 =1000.;
2401 // get weight of hypothesys - using best hypothesy
2404 Int_t list1[6],list2[6];
2405 AliITSRecPoint *clist1[6], *clist2[6] ;
2406 RegisterClusterTracks(track10,trackID1);
2407 RegisterClusterTracks(track20,trackID2);
2408 Float_t conflict1 = GetNumberOfSharedClusters(track10,trackID1,list1,clist1);
2409 Float_t conflict2 = GetNumberOfSharedClusters(track20,trackID2,list2,clist2);
2410 UnRegisterClusterTracks(track10,trackID1);
2411 UnRegisterClusterTracks(track20,trackID2);
2414 Float_t chi21 =0,chi22=0,ncl1=0,ncl2=0;
2415 Float_t nerry[6],nerrz[6];
2416 Float_t *erry1=GetErrY(trackID1),*errz1 = GetErrZ(trackID1);
2417 Float_t *erry2=GetErrY(trackID2),*errz2 = GetErrZ(trackID2);
2418 for (Int_t i=0;i<6;i++){
2419 if ( (erry1[i]>0) && (erry2[i]>0)) {
2420 nerry[i] = TMath::Min(erry1[i],erry2[i]);
2421 nerrz[i] = TMath::Min(errz1[i],errz2[i]);
2423 nerry[i] = TMath::Max(erry1[i],erry2[i]);
2424 nerrz[i] = TMath::Max(errz1[i],errz2[i]);
2426 if (TMath::Abs(track10->GetDy(i))>0.000000000000001){
2427 chi21 += track10->GetDy(i)*track10->GetDy(i)/(nerry[i]*nerry[i]);
2428 chi21 += track10->GetDz(i)*track10->GetDz(i)/(nerrz[i]*nerrz[i]);
2431 if (TMath::Abs(track20->GetDy(i))>0.000000000000001){
2432 chi22 += track20->GetDy(i)*track20->GetDy(i)/(nerry[i]*nerry[i]);
2433 chi22 += track20->GetDz(i)*track20->GetDz(i)/(nerrz[i]*nerrz[i]);
2441 Float_t d1 = TMath::Sqrt(track10->GetD(0)*track10->GetD(0)+track10->GetD(1)*track10->GetD(1))+0.1;
2442 Float_t d2 = TMath::Sqrt(track20->GetD(0)*track20->GetD(0)+track20->GetD(1)*track20->GetD(1))+0.1;
2443 Float_t s1 = TMath::Sqrt(track10->GetSigmaY2()*track10->GetSigmaZ2());
2444 Float_t s2 = TMath::Sqrt(track20->GetSigmaY2()*track20->GetSigmaZ2());
2446 w1 = (d2/(d1+d2)+ 2*s2/(s1+s2)+
2447 +s2/(s1+s2)*0.5*(chi22+2.)/(chi21+chi22+4.)
2448 +1.*TMath::Abs(1./track10->Get1Pt())/(TMath::Abs(1./track10->Get1Pt())+TMath::Abs(1./track20->Get1Pt()))
2450 w2 = (d1/(d1+d2)+ 2*s1/(s1+s2)+
2451 s1/(s1+s2)*0.5*(chi21+2.)/(chi21+chi22+4.)
2452 +1.*TMath::Abs(1./track20->Get1Pt())/(TMath::Abs(1./track10->Get1Pt())+TMath::Abs(1./track20->Get1Pt()))
2455 Double_t sumw = w1+w2;
2459 w1 = (d2+0.5)/(d1+d2+1.);
2460 w2 = (d1+0.5)/(d1+d2+1.);
2462 // Float_t maxmax = w1*track10->fChi2MIP[0]+w2*track20->fChi2MIP[0]+w1*conflict1+w2*conflict2+1.;
2463 //Float_t maxconflicts0 = w1*conflict1+w2*conflict2;
2465 // get pair of "best" hypothesys
2467 Float_t * ny1 = GetNy(trackID1), * nz1 = GetNz(trackID1);
2468 Float_t * ny2 = GetNy(trackID2), * nz2 = GetNz(trackID2);
2470 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
2471 AliITStrackMI * track1=(AliITStrackMI*) arr1->UncheckedAt(itrack1);
2472 //if (track1->fFakeRatio>0) continue;
2473 RegisterClusterTracks(track1,trackID1);
2474 for (Int_t itrack2=0;itrack2<entries2;itrack2++){
2475 AliITStrackMI * track2=(AliITStrackMI*) arr2->UncheckedAt(itrack2);
2477 // Float_t current = w1*track1->fChi2MIP[0]+w2*track2->fChi2MIP[0];
2478 //if (track2->fFakeRatio>0) continue;
2480 RegisterClusterTracks(track2,trackID2);
2481 Int_t list1[6],list2[6];
2482 AliITSRecPoint *clist1[6], *clist2[6] ;
2483 Float_t cconflict1 = GetNumberOfSharedClusters(track1,trackID1,list1,clist1);
2484 Float_t cconflict2 = GetNumberOfSharedClusters(track2,trackID2,list2,clist2);
2485 UnRegisterClusterTracks(track2,trackID2);
2487 if (track1->GetConstrain()) nskipped+=w1*track1->GetNSkipped();
2488 if (track2->GetConstrain()) nskipped+=w2*track2->GetNSkipped();
2489 if (nskipped>0.5) continue;
2491 //if ( w1*conflict1+w2*conflict2>maxconflicts0) continue;
2492 if (conflict1+1<cconflict1) continue;
2493 if (conflict2+1<cconflict2) continue;
2497 for (Int_t i=0;i<6;i++){
2499 Float_t c1 =0.; // conflict coeficients
2501 if (clist1[i]&&clist2[i]){
2504 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-TMath::Max(ny1[i],ny2[i])-TMath::Max(nz1[i],nz2[i]));
2507 deltan = (clist1[i]->GetNz()-TMath::Max(nz1[i],nz2[i]));
2509 c1 = 2./TMath::Max(3.+deltan,2.);
2510 c2 = 2./TMath::Max(3.+deltan,2.);
2516 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-ny1[i]-nz1[i]);
2519 deltan = (clist1[i]->GetNz()-nz1[i]);
2521 c1 = 2./TMath::Max(3.+deltan,2.);
2528 deltan = (clist2[i]->GetNy()+clist2[i]->GetNz()-ny2[i]-nz2[i]);
2531 deltan = (clist2[i]->GetNz()-nz2[i]);
2533 c2 = 2./TMath::Max(3.+deltan,2.);
2538 Double_t chi21=0,chi22=0;
2539 if (TMath::Abs(track1->GetDy(i))>0.) {
2540 chi21 = (track1->GetDy(i)/track1->GetSigmaY(i))*(track1->GetDy(i)/track1->GetSigmaY(i))+
2541 (track1->GetDz(i)/track1->GetSigmaZ(i))*(track1->GetDz(i)/track1->GetSigmaZ(i));
2542 //chi21 = (track1->fDy[i]*track1->fDy[i])/(nerry[i]*nerry[i])+
2543 // (track1->GetDz(i)*track1->GetDz(i))/(nerrz[i]*nerrz[i]);
2545 if (TMath::Abs(track1->GetSigmaY(i)>0.)) c1=1;
2548 if (TMath::Abs(track2->GetDy(i))>0.) {
2549 chi22 = (track2->GetDy(i)/track2->GetSigmaY(i))*(track2->GetDy(i)/track2->GetSigmaY(i))+
2550 (track2->GetDz(i)/track2->GetSigmaZ(i))*(track2->GetDz(i)/track2->GetSigmaZ(i));
2551 //chi22 = (track2->fDy[i]*track2->fDy[i])/(nerry[i]*nerry[i])+
2552 // (track2->fDz[i]*track2->fDz[i])/(nerrz[i]*nerrz[i]);
2555 if (TMath::Abs(track2->GetSigmaY(i)>0.)) c2=1;
2557 sumchi2+=w1*(1.+c1)*(1+c1)*(chi21+c1)+w2*(1.+c2)*(1+c2)*(chi22+c2);
2558 if (chi21>0) sum+=w1;
2559 if (chi22>0) sum+=w2;
2562 Double_t norm = sum-w1*track1->GetNSkipped()-w2*track2->GetNSkipped();
2563 if (norm<0) norm =1/(w1*track1->GetNSkipped()+w2*track2->GetNSkipped());
2564 Double_t normchi2 = 2*conflict+sumchi2/sum;
2565 if ( normchi2 <maxchi2 ){
2568 maxconflicts = conflict;
2572 UnRegisterClusterTracks(track1,trackID1);
2575 // if (maxconflicts<4 && maxchi2<th0){
2576 if (maxchi2<th0*2.){
2577 Float_t orig = track10->GetFakeRatio()*track10->GetNumberOfClusters();
2578 AliITStrackMI* track1=(AliITStrackMI*) arr1->UncheckedAt(index1);
2579 track1->SetChi2MIP(5,maxconflicts);
2580 track1->SetChi2MIP(6,maxchi2);
2581 track1->SetChi2MIP(7,0.01+orig-(track1->GetFakeRatio()*track1->GetNumberOfClusters()));
2582 // track1->UpdateESDtrack(AliESDtrack::kITSin);
2583 track1->SetChi2MIP(8,index1);
2584 fBestTrackIndex[trackID1] =index1;
2585 UpdateESDtrack(track1, AliESDtrack::kITSin);
2587 else if (track10->GetChi2MIP(0)<th1){
2588 track10->SetChi2MIP(5,maxconflicts);
2589 track10->SetChi2MIP(6,maxchi2);
2590 // track10->UpdateESDtrack(AliESDtrack::kITSin);
2591 UpdateESDtrack(track10,AliESDtrack::kITSin);
2594 for (Int_t itrack=0;itrack<entries1;itrack++){
2595 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
2596 UnRegisterClusterTracks(track,trackID1);
2599 for (Int_t itrack=0;itrack<entries2;itrack++){
2600 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
2601 UnRegisterClusterTracks(track,trackID2);
2604 if (track10->GetConstrain()&&track10->GetChi2MIP(0)<kMaxChi2PerCluster[0]&&track10->GetChi2MIP(1)<kMaxChi2PerCluster[1]
2605 &&track10->GetChi2MIP(2)<kMaxChi2PerCluster[2]&&track10->GetChi2MIP(3)<kMaxChi2PerCluster[3]){
2606 // if (track10->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track10->fChi2MIP[1]<kMaxChi2PerCluster[1]
2607 // &&track10->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track10->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2608 RegisterClusterTracks(track10,trackID1);
2610 if (track20->GetConstrain()&&track20->GetChi2MIP(0)<kMaxChi2PerCluster[0]&&track20->GetChi2MIP(1)<kMaxChi2PerCluster[1]
2611 &&track20->GetChi2MIP(2)<kMaxChi2PerCluster[2]&&track20->GetChi2MIP(3)<kMaxChi2PerCluster[3]){
2612 //if (track20->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track20->fChi2MIP[1]<kMaxChi2PerCluster[1]
2613 // &&track20->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track20->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2614 RegisterClusterTracks(track20,trackID2);
2620 void AliITStrackerMI::UseClusters(const AliKalmanTrack *t, Int_t from) const {
2621 //--------------------------------------------------------------------
2622 // This function marks clusters assigned to the track
2623 //--------------------------------------------------------------------
2624 AliTracker::UseClusters(t,from);
2626 AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(0));
2627 //if (c->GetQ()>2) c->Use();
2628 if (c->GetSigmaZ2()>0.1) c->Use();
2629 c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(1));
2630 //if (c->GetQ()>2) c->Use();
2631 if (c->GetSigmaZ2()>0.1) c->Use();
2636 void AliITStrackerMI::AddTrackHypothesys(AliITStrackMI * track, Int_t esdindex)
2638 //------------------------------------------------------------------
2639 // add track to the list of hypothesys
2640 //------------------------------------------------------------------
2642 if (esdindex>=fTrackHypothesys.GetEntriesFast()) fTrackHypothesys.Expand(esdindex*2+10);
2644 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2646 array = new TObjArray(10);
2647 fTrackHypothesys.AddAt(array,esdindex);
2649 array->AddLast(track);
2652 void AliITStrackerMI::SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode)
2654 //-------------------------------------------------------------------
2655 // compress array of track hypothesys
2656 // keep only maxsize best hypothesys
2657 //-------------------------------------------------------------------
2658 if (esdindex>fTrackHypothesys.GetEntriesFast()) return;
2659 if (! (fTrackHypothesys.At(esdindex)) ) return;
2660 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2661 Int_t entries = array->GetEntriesFast();
2663 //- find preliminary besttrack as a reference
2664 Float_t minchi2=10000;
2666 AliITStrackMI * besttrack=0;
2667 for (Int_t itrack=0;itrack<array->GetEntriesFast();itrack++){
2668 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2669 if (!track) continue;
2670 Float_t chi2 = NormalizedChi2(track,0);
2672 Int_t tpcLabel=track->GetESDtrack()->GetTPCLabel();
2673 track->SetLabel(tpcLabel);
2675 track->SetFakeRatio(1.);
2676 CookLabel(track,0.); //For comparison only
2678 //if (chi2<kMaxChi2PerCluster[0]&&track->fFakeRatio==0){
2679 if (chi2<kMaxChi2PerCluster[0]){
2680 if (track->GetNumberOfClusters()<maxn) continue;
2681 maxn = track->GetNumberOfClusters();
2688 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
2689 delete array->RemoveAt(itrack);
2693 if (!besttrack) return;
2696 //take errors of best track as a reference
2697 Float_t *erry = GetErrY(esdindex), *errz = GetErrZ(esdindex);
2698 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
2699 for (Int_t i=0;i<6;i++) {
2700 if (besttrack->GetClIndex(i)>0){
2701 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2702 errz[i] = besttrack->GetSigmaZ(i); errz[i+6] = besttrack->GetSigmaZ(i+6);
2703 ny[i] = besttrack->GetNy(i);
2704 nz[i] = besttrack->GetNz(i);
2708 // calculate normalized chi2
2710 Float_t * chi2 = new Float_t[entries];
2711 Int_t * index = new Int_t[entries];
2712 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2713 for (Int_t itrack=0;itrack<entries;itrack++){
2714 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2716 track->SetChi2MIP(0,GetNormalizedChi2(track, mode));
2717 if (track->GetChi2MIP(0)<kMaxChi2PerCluster[0])
2718 chi2[itrack] = track->GetChi2MIP(0);
2720 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
2721 delete array->RemoveAt(itrack);
2727 TMath::Sort(entries,chi2,index,kFALSE);
2728 besttrack = (AliITStrackMI*)array->At(index[0]);
2729 if (besttrack&&besttrack->GetChi2MIP(0)<kMaxChi2PerCluster[0]){
2730 for (Int_t i=0;i<6;i++){
2731 if (besttrack->GetClIndex(i)>0){
2732 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2733 errz[i] = besttrack->GetSigmaZ(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2734 ny[i] = besttrack->GetNy(i);
2735 nz[i] = besttrack->GetNz(i);
2740 // calculate one more time with updated normalized errors
2741 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2742 for (Int_t itrack=0;itrack<entries;itrack++){
2743 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2745 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
2746 if (track->GetChi2MIP(0)<kMaxChi2PerCluster[0])
2747 chi2[itrack] = track->GetChi2MIP(0)-0*(track->GetNumberOfClusters()+track->GetNDeadZone());
2750 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
2751 delete array->RemoveAt(itrack);
2756 entries = array->GetEntriesFast();
2760 TObjArray * newarray = new TObjArray();
2761 TMath::Sort(entries,chi2,index,kFALSE);
2762 besttrack = (AliITStrackMI*)array->At(index[0]);
2765 for (Int_t i=0;i<6;i++){
2766 if (besttrack->GetNz(i)>0&&besttrack->GetNy(i)>0){
2767 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2768 errz[i] = besttrack->GetSigmaZ(i); errz[i+6] = besttrack->GetSigmaZ(i+6);
2769 ny[i] = besttrack->GetNy(i);
2770 nz[i] = besttrack->GetNz(i);
2773 besttrack->SetChi2MIP(0,GetNormalizedChi2(besttrack,mode));
2774 Float_t minchi2 = TMath::Min(besttrack->GetChi2MIP(0)+5.+besttrack->GetNUsed(), double(kMaxChi2PerCluster[0]));
2775 Float_t minn = besttrack->GetNumberOfClusters()-3;
2777 for (Int_t i=0;i<entries;i++){
2778 AliITStrackMI * track = (AliITStrackMI*)array->At(index[i]);
2779 if (!track) continue;
2780 if (accepted>maxcut) break;
2781 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
2782 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
2783 if (track->GetNumberOfClusters()<6 && (track->GetChi2MIP(0)+track->GetNUsed()>minchi2)){
2784 delete array->RemoveAt(index[i]);
2788 Bool_t shortbest = !track->GetConstrain() && track->GetNumberOfClusters()<6;
2789 if ((track->GetChi2MIP(0)+track->GetNUsed()<minchi2 && track->GetNumberOfClusters()>=minn) ||shortbest){
2790 if (!shortbest) accepted++;
2792 newarray->AddLast(array->RemoveAt(index[i]));
2793 for (Int_t i=0;i<6;i++){
2795 erry[i] = track->GetSigmaY(i); erry[i+6] = track->GetSigmaY(i+6);
2796 errz[i] = track->GetSigmaZ(i); errz[i] = track->GetSigmaZ(i+6);
2797 ny[i] = track->GetNy(i);
2798 nz[i] = track->GetNz(i);
2803 delete array->RemoveAt(index[i]);
2807 delete fTrackHypothesys.RemoveAt(esdindex);
2808 fTrackHypothesys.AddAt(newarray,esdindex);
2812 delete fTrackHypothesys.RemoveAt(esdindex);
2821 AliITStrackMI * AliITStrackerMI::GetBestHypothesys(Int_t esdindex, AliITStrackMI * original, Int_t checkmax)
2823 //-------------------------------------------------------------
2824 // try to find best hypothesy
2825 // currently - minimal chi2 of track+backpropagated track+matching to the tpc track
2826 //-------------------------------------------------------------
2827 if (fTrackHypothesys.GetEntriesFast()<=esdindex) return 0;
2828 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2829 if (!array) return 0;
2830 Int_t entries = array->GetEntriesFast();
2831 if (!entries) return 0;
2832 Float_t minchi2 = 100000;
2833 AliITStrackMI * besttrack=0;
2835 AliITStrackMI * backtrack = new AliITStrackMI(*original);
2836 AliITStrackMI * forwardtrack = new AliITStrackMI(*original);
2837 Double_t xyzv[]={GetX(),GetY(),GetZ()};
2838 Double_t ersv[]={GetSigmaX()/3.,GetSigmaY()/3.,GetSigmaZ()/3.};
2840 for (Int_t i=0;i<entries;i++){
2841 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
2842 if (!track) continue;
2843 Float_t sigmarfi,sigmaz;
2844 GetDCASigma(track,sigmarfi,sigmaz);
2845 track->SetDnorm(0,sigmarfi);
2846 track->SetDnorm(1,sigmaz);
2848 track->SetChi2MIP(1,1000000);
2849 track->SetChi2MIP(2,1000000);
2850 track->SetChi2MIP(3,1000000);
2853 backtrack = new(backtrack) AliITStrackMI(*track);
2854 if (track->GetConstrain()){
2855 if (!backtrack->PropagateTo(3.,0.0028,65.19)) continue;
2856 if (!backtrack->Improve(0,xyzv,ersv)) continue;
2857 //if (!backtrack->PropagateTo(2.,0.0028,0)) continue; // This
2858 //if (!backtrack->Improve(0,xyzv,ersv)) continue; // is
2859 //if (!backtrack->PropagateTo(1.,0.0028,0)) continue; // an over-kill
2860 //if (!backtrack->Improve(0,xyzv,ersv)) continue; // (I.B.)
2861 //if (!backtrack->PropagateToVertex()) continue; //
2862 backtrack->ResetCovariance(10.);
2863 //if (!backtrack->Improve(0,xyzv,ersv)) continue;
2865 backtrack->ResetCovariance(10.);
2867 backtrack->ResetClusters();
2869 Double_t x = original->GetX();
2870 if (!RefitAt(x,backtrack,track)) continue;
2872 track->SetChi2MIP(1,NormalizedChi2(backtrack,0));
2873 //for (Int_t i=2;i<6;i++){track->fDy[i]+=backtrack->fDy[i]; track->fDz[i]+=backtrack->fDz[i];}
2874 if (track->GetChi2MIP(1)>kMaxChi2PerCluster[1]*6.) continue;
2875 track->SetChi22(GetMatchingChi2(backtrack,original));
2877 if ((track->GetConstrain()) && track->GetChi22()>90.) continue;
2878 if ((!track->GetConstrain()) && track->GetChi22()>30.) continue;
2879 if ( track->GetChi22()/track->GetNumberOfClusters()>11.) continue;
2882 if (!(track->GetConstrain())&&track->GetChi2MIP(1)>kMaxChi2PerCluster[1]) continue;
2886 //forward track - without constraint
2887 forwardtrack = new(forwardtrack) AliITStrackMI(*original);
2888 forwardtrack->ResetClusters();
2890 RefitAt(x,forwardtrack,track);
2891 track->SetChi2MIP(2,NormalizedChi2(forwardtrack,0));
2892 if (track->GetChi2MIP(2)>kMaxChi2PerCluster[2]*6.0) continue;
2893 if (!(track->GetConstrain())&&track->GetChi2MIP(2)>kMaxChi2PerCluster[2]) continue;
2895 //track->fD[0] = forwardtrack->GetD(GetX(),GetY());
2896 //track->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
2897 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),track->GetDP()); //I.B.
2898 forwardtrack->SetD(0,track->GetD(0));
2899 forwardtrack->SetD(1,track->GetD(1));
2902 AliITSRecPoint* clist[6];
2903 track->SetChi2MIP(4,GetNumberOfSharedClusters(track,esdindex,list,clist));
2904 if ( (!track->GetConstrain()) && track->GetChi2MIP(4)>1.0) continue;
2907 track->SetChi2MIP(3,GetInterpolatedChi2(forwardtrack,backtrack));
2908 if ( (track->GetChi2MIP(3)>6.*kMaxChi2PerCluster[3])) continue;
2909 if ( (!track->GetConstrain()) && (track->GetChi2MIP(3)>2*kMaxChi2PerCluster[3])) {
2910 track->SetChi2MIP(3,1000);
2913 Double_t chi2 = track->GetChi2MIP(0)+track->GetNUsed();
2915 for (Int_t ichi=0;ichi<5;ichi++){
2916 forwardtrack->SetChi2MIP(ichi, track->GetChi2MIP(ichi));
2918 if (chi2 < minchi2){
2919 //besttrack = new AliITStrackMI(*forwardtrack);
2921 besttrack->SetLabel(track->GetLabel());
2922 besttrack->SetFakeRatio(track->GetFakeRatio());
2924 //original->fD[0] = forwardtrack->GetD(GetX(),GetY());
2925 //original->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
2926 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),original->GetDP()); //I.B.
2930 delete forwardtrack;
2932 for (Int_t i=0;i<entries;i++){
2933 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
2934 if (!track) continue;
2936 if (accepted>checkmax || track->GetChi2MIP(3)>kMaxChi2PerCluster[3]*6. ||
2937 (track->GetNumberOfClusters()<besttrack->GetNumberOfClusters()-1.)||
2938 track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*besttrack->GetNUsed()+3.){
2939 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
2940 delete array->RemoveAt(i);
2950 SortTrackHypothesys(esdindex,checkmax,1);
2951 array = (TObjArray*) fTrackHypothesys.At(esdindex);
2952 if (!array) return 0; // PH What can be the reason? Check SortTrackHypothesys
2953 besttrack = (AliITStrackMI*)array->At(0);
2954 if (!besttrack) return 0;
2955 besttrack->SetChi2MIP(8,0);
2956 fBestTrackIndex[esdindex]=0;
2957 entries = array->GetEntriesFast();
2958 AliITStrackMI *longtrack =0;
2960 Float_t minn=besttrack->GetNumberOfClusters()+besttrack->GetNDeadZone();
2961 for (Int_t itrack=entries-1;itrack>0;itrack--){
2962 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2963 if (!track->GetConstrain()) continue;
2964 if (track->GetNumberOfClusters()+track->GetNDeadZone()<minn) continue;
2965 if (track->GetChi2MIP(0)-besttrack->GetChi2MIP(0)>0.0) continue;
2966 if (track->GetChi2MIP(0)>4.) continue;
2967 minn = track->GetNumberOfClusters()+track->GetNDeadZone();
2970 //if (longtrack) besttrack=longtrack;
2973 AliITSRecPoint * clist[6];
2974 Float_t shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
2975 if (besttrack->GetConstrain()&&besttrack->GetChi2MIP(0)<kMaxChi2PerCluster[0]&&besttrack->GetChi2MIP(1)<kMaxChi2PerCluster[1]
2976 &&besttrack->GetChi2MIP(2)<kMaxChi2PerCluster[2]&&besttrack->GetChi2MIP(3)<kMaxChi2PerCluster[3]){
2977 RegisterClusterTracks(besttrack,esdindex);
2984 Int_t sharedtrack = GetOverlapTrack(besttrack, esdindex, nshared, list, overlist);
2985 if (sharedtrack>=0){
2987 besttrack = GetBest2Tracks(esdindex,sharedtrack,10,5.5);
2989 shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
2995 if (shared>2.5) return 0;
2996 if (shared>1.0) return besttrack;
2998 // Don't sign clusters if not gold track
3000 if (!besttrack->IsGoldPrimary()) return besttrack;
3001 if (besttrack->GetESDtrack()->GetKinkIndex(0)!=0) return besttrack; //track belong to kink
3003 if (fConstraint[fPass]){
3007 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
3008 for (Int_t i=0;i<6;i++){
3009 Int_t index = besttrack->GetClIndex(i);
3010 if (index<=0) continue;
3011 Int_t ilayer = (index & 0xf0000000) >> 28;
3012 if (besttrack->GetSigmaY(ilayer)<0.00000000001) continue;
3013 AliITSRecPoint *c = (AliITSRecPoint*)GetCluster(index);
3015 if (ilayer>3&&c->GetNy()+c->GetNz()>6) continue;
3016 if ( (c->GetNy()+c->GetNz() )> ny[i]+nz[i]+0.7) continue; //shared track
3017 if ( c->GetNz()> nz[i]+0.7) continue; //shared track
3018 if ( ilayer>2&& besttrack->GetNormQ(ilayer)/besttrack->GetExpQ()>1.5) continue;
3019 //if ( c->GetNy()> ny[i]+0.7) continue; //shared track
3021 Bool_t cansign = kTRUE;
3022 for (Int_t itrack=0;itrack<entries; itrack++){
3023 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
3024 if (!track) continue;
3025 if (track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*shared+1.) break;
3026 if ( (track->GetClIndex(ilayer)>0) && (track->GetClIndex(ilayer)!=besttrack->GetClIndex(ilayer))){
3032 if (TMath::Abs(besttrack->GetDy(ilayer)/besttrack->GetSigmaY(ilayer))>3.) continue;
3033 if (TMath::Abs(besttrack->GetDz(ilayer)/besttrack->GetSigmaZ(ilayer))>3.) continue;
3034 if (!c->IsUsed()) c->Use();
3043 void AliITStrackerMI::GetBestHypothesysMIP(TObjArray &itsTracks)
3046 // get "best" hypothesys
3049 Int_t nentries = itsTracks.GetEntriesFast();
3050 for (Int_t i=0;i<nentries;i++){
3051 AliITStrackMI* track = (AliITStrackMI*)itsTracks.At(i);
3052 if (!track) continue;
3053 TObjArray * array = (TObjArray*) fTrackHypothesys.At(i);
3054 if (!array) continue;
3055 if (array->GetEntriesFast()<=0) continue;
3057 AliITStrackMI* longtrack=0;
3059 Float_t maxchi2=1000;
3060 for (Int_t j=0;j<array->GetEntriesFast();j++){
3061 AliITStrackMI* track = (AliITStrackMI*)array->At(j);
3062 if (!track) continue;
3063 if (track->GetGoldV0()) {
3064 longtrack = track; //gold V0 track taken
3067 if (track->GetNumberOfClusters()+track->GetNDeadZone()<minn) continue;
3068 Float_t chi2 = track->GetChi2MIP(0);
3070 if (!track->GetGoldV0()&&track->GetConstrain()==kFALSE) chi2+=5;
3072 if (track->GetNumberOfClusters()+track->GetNDeadZone()>minn) maxchi2 = track->GetChi2MIP(0);
3074 if (chi2 > maxchi2) continue;
3075 minn= track->GetNumberOfClusters()+track->GetNDeadZone();
3082 AliITStrackMI * besttrack = (AliITStrackMI*)array->At(0);
3083 if (!longtrack) {longtrack = besttrack;}
3084 else besttrack= longtrack;
3088 AliITSRecPoint * clist[6];
3089 Float_t shared = GetNumberOfSharedClusters(longtrack,i,list,clist);
3091 track->SetNUsed(shared);
3092 track->SetNSkipped(besttrack->GetNSkipped());
3093 track->SetChi2MIP(0,besttrack->GetChi2MIP(0));
3098 Int_t sharedtrack = GetOverlapTrack(longtrack, i, nshared, list, overlist);
3099 //if (sharedtrack==-1) sharedtrack=0;
3100 if (sharedtrack>=0){
3101 besttrack = GetBest2Tracks(i,sharedtrack,10,5.5);
3104 if (besttrack&&fAfterV0){
3105 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3107 if (besttrack&&fConstraint[fPass])
3108 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3109 //if (besttrack&&besttrack->fConstrain)
3110 // UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3111 if (besttrack->GetChi2MIP(0)+besttrack->GetNUsed()>1.5){
3112 if ( (TMath::Abs(besttrack->GetD(0))>0.1) && fConstraint[fPass]) {
3113 track->SetReconstructed(kFALSE);
3115 if ( (TMath::Abs(besttrack->GetD(1))>0.1) && fConstraint[fPass]){
3116 track->SetReconstructed(kFALSE);
3125 void AliITStrackerMI::CookLabel(AliITStrackMI *track,Float_t wrong) const {
3126 //--------------------------------------------------------------------
3127 //This function "cooks" a track label. If label<0, this track is fake.
3128 //--------------------------------------------------------------------
3131 if ( track->GetESDtrack()) tpcLabel = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
3133 track->SetChi2MIP(9,0);
3135 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3136 Int_t cindex = track->GetClusterIndex(i);
3137 Int_t l=(cindex & 0xf0000000) >> 28;
3138 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
3140 for (Int_t ind=0;ind<3;ind++){
3142 if (cl->GetLabel(ind)==tpcLabel) isWrong=0;
3144 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
3147 track->SetFakeRatio(double(nwrong)/double(track->GetNumberOfClusters()));
3149 if (track->GetFakeRatio()>wrong) track->SetLabel(-tpcLabel);
3151 track->SetLabel(tpcLabel);
3158 void AliITStrackerMI::CookdEdx(AliITStrackMI* track)
3163 //AliITSRecPoint * clist[6];
3164 // Int_t shared = GetNumberOfSharedClusters(track,index,list,clist);
3167 track->SetChi2MIP(9,0);
3168 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3169 Int_t cindex = track->GetClusterIndex(i);
3170 Int_t l=(cindex & 0xf0000000) >> 28;
3171 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
3172 Int_t lab = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
3174 for (Int_t ind=0;ind<3;ind++){
3175 if (cl->GetLabel(ind)==lab) isWrong=0;
3177 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
3179 //if (l>3 && (cl->GetNy()>4) || (cl->GetNz()>4)) continue; //shared track
3180 //if (l>3&& !(cl->GetType()==1||cl->GetType()==10)) continue;
3181 //if (l<4&& !(cl->GetType()==1)) continue;
3182 dedx[accepted]= track->GetSampledEdx(i);
3183 //dedx[accepted]= track->fNormQ[l];
3191 TMath::Sort(accepted,dedx,indexes,kFALSE);
3194 Double_t nl=low*accepted, nu =up*accepted;
3196 Float_t sumweight =0;
3197 for (Int_t i=0; i<accepted; i++) {
3199 if (i<nl+0.1) weight = TMath::Max(1.-(nl-i),0.);
3200 if (i>nu-1) weight = TMath::Max(nu-i,0.);
3201 sumamp+= dedx[indexes[i]]*weight;
3204 track->SetdEdx(sumamp/sumweight);
3208 void AliITStrackerMI::MakeCoeficients(Int_t ntracks){
3211 if (fCoeficients) delete []fCoeficients;
3212 fCoeficients = new Float_t[ntracks*48];
3213 for (Int_t i=0;i<ntracks*48;i++) fCoeficients[i]=-1.;
3217 Double_t AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer)
3223 Float_t theta = track->GetTgl();
3224 Float_t phi = track->GetSnp();
3225 phi = TMath::Sqrt(phi*phi/(1.-phi*phi));
3226 GetError(layer,cluster,theta,phi,track->GetExpQ(),erry,errz);
3227 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz);
3229 GetNTeor(layer,cluster, theta,phi,ny,nz);
3230 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
3232 chi2+=0.5*TMath::Min(delta/2,2.);
3233 chi2+=2.*cluster->GetDeltaProbability();
3236 track->SetNy(layer,ny);
3237 track->SetNz(layer,nz);
3238 track->SetSigmaY(layer,erry);
3239 track->SetSigmaZ(layer, errz);
3240 //track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt(1+theta*theta+phi*phi);
3241 track->SetNormQ(layer,cluster->GetQ()/TMath::Sqrt((1.+ track->GetTgl()*track->GetTgl())/(1.- track->GetSnp()*track->GetSnp())));
3246 Int_t AliITStrackerMI::UpdateMI(AliITStrackMI* track, const AliITSRecPoint* cl,Double_t chi2,Int_t index) const
3251 Int_t layer = (index & 0xf0000000) >> 28;
3252 track->SetClIndex(layer, index);
3253 if ( (layer>1) &&track->GetNormQ(layer)/track->GetExpQ()<0.5 ) {
3254 chi2+= (0.5-track->GetNormQ(layer)/track->GetExpQ())*10.;
3255 track->SetdEdxMismatch(track->GetdEdxMismatch()+(0.5-track->GetNormQ(layer)/track->GetExpQ())*10.);
3258 if (cl->GetQ()>0) // ingore the "virtual" clusters
3259 if (!track->PropagateTo(cl->GetX(),0.,0.)) return 0; // Alignment
3261 return track->UpdateMI(cl->GetY(),cl->GetZ(),track->GetSigmaY(layer),track->GetSigmaZ(layer),chi2,index);
3264 void AliITStrackerMI::GetNTeor(Int_t layer, const AliITSRecPoint* /*cl*/, Float_t theta, Float_t phi, Float_t &ny, Float_t &nz)
3270 ny = 1.+TMath::Abs(phi)*3.2;
3271 nz = 1.+TMath::Abs(theta)*0.34;
3275 ny = 1.+TMath::Abs(phi)*3.2;
3276 nz = 1.+TMath::Abs(theta)*0.28;
3281 ny = 2.02+TMath::Abs(phi)*1.95;
3282 nz = 2.02+TMath::Abs(phi)*2.35;
3285 ny = 6.6-2.7*TMath::Abs(phi);
3286 nz = 2.8-3.11*TMath::Abs(phi)+0.45*TMath::Abs(theta);
3291 Int_t AliITStrackerMI::GetError(Int_t layer, const AliITSRecPoint*cl, Float_t theta, Float_t phi,Float_t expQ, Float_t &erry, Float_t &errz)
3293 //calculate cluster position error
3296 GetNTeor(layer, cl,theta,phi,ny,nz);
3297 erry = TMath::Sqrt(cl->GetSigmaY2());
3298 errz = TMath::Sqrt(cl->GetSigmaZ2());
3303 if (TMath::Abs(ny-cl->GetNy())>0.6) {
3304 if (ny<cl->GetNy()){
3305 erry*=0.4+TMath::Abs(ny-cl->GetNy());
3306 errz*=0.4+TMath::Abs(ny-cl->GetNy());
3308 erry*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
3309 errz*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
3312 if (TMath::Abs(nz-cl->GetNz())>1.) {
3313 erry*=TMath::Abs(nz-cl->GetNz());
3314 errz*=TMath::Abs(nz-cl->GetNz());
3318 erry= TMath::Min(erry,float(0.005));
3319 errz= TMath::Min(errz,float(0.03));
3325 //factor 1.8 appears in new simulation
3328 if (cl->GetNy()==100||cl->GetNz()==100){
3333 if (cl->GetNy()+cl->GetNz()>12){
3338 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
3339 Float_t chargematch = TMath::Max(double(normq/expQ),2.);
3341 if (cl->GetType()==1 || cl->GetType()==10 ){
3342 if (chargematch<1.0 || (cl->GetNy()+cl->GetNz()<nz+ny+0.5)){
3344 erry = 0.00094*scale;
3347 if (cl->GetNy()+cl->GetNz()<nz+ny+1.2){
3352 erry = 0.0027*scale;
3353 errz = TMath::Min(0.028*(chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.15)*scale;
3356 if (cl->GetType()==2 || cl->GetType()==11 ){
3357 erry = TMath::Min(0.0010*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.05)*scale;
3358 errz = TMath::Min(0.025*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.5)*scale;
3362 if (cl->GetType()>100 ){
3363 if ((chargematch+cl->GetNy()+cl->GetNz()-nz-ny<1.5)){
3365 erry = 0.00096*scale;
3368 if (cl->GetNy()+cl->GetNz()-nz-ny<1){
3370 erry = 0.0025*scale;
3374 errz = TMath::Min(0.05*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.4)*scale;
3375 erry = TMath::Min(0.003*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.05)*scale;
3378 Float_t diff = cl->GetNy()+cl->GetNz()-ny-nz;
3382 if (cl->GetType()==5||cl->GetType()==6||cl->GetType()==7||cl->GetType()==8){
3392 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
3393 Float_t chargematch = normq/expQ;
3395 Int_t cnz = cl->GetNz()%10;
3397 if (cl->GetType()==1){
3398 if (chargematch<1.25){
3399 erry = 0.0028*(1.+6./cl->GetQ()); // gold clusters
3402 erry = 0.003*chargematch;
3403 if (cl->GetNz()==3) erry*=1.5;
3405 if (chargematch<1.0){
3406 errz = 0.0011*(1.+6./cl->GetQ());
3409 errz = 0.002*(1+2*(chargematch-1.));
3413 errz*=1.4*(cnz-nz+0.5);
3416 if (cl->GetType()>1){
3418 erry = 0.00385*(1.+6./cl->GetQ()); // gold clusters
3419 errz = 0.0016*(1.+6./cl->GetQ());
3422 errz = 0.0014*(1+3*(chargematch-1.));
3423 erry = 0.003*(1+3*(chargematch-1.));
3427 errz*=1.4*(cnz-nz+0.5);
3431 if (TMath::Abs(cl->GetY())>2.5){
3432 factorz*=1+2*(TMath::Abs(cl->GetY())-2.5);
3434 if (TMath::Abs(cl->GetY())<1){
3435 factorz*=1.+0.5*TMath::Abs(TMath::Abs(cl->GetY())-1.);
3437 factorz= TMath::Min(factorz,float(4.));
3440 erry= TMath::Min(erry,float(0.05));
3441 errz= TMath::Min(errz,float(0.05));
3447 void AliITStrackerMI::GetDCASigma(AliITStrackMI* track, Float_t & sigmarfi, Float_t &sigmaz)
3450 //DCA sigmas parameterization
3451 //to be paramterized using external parameters in future
3454 sigmarfi = 0.004+1.4 *TMath::Abs(track->GetC())+332.*track->GetC()*track->GetC();
3455 sigmaz = 0.011+4.37*TMath::Abs(track->GetC());
3459 void AliITStrackerMI::SignDeltas( TObjArray *ClusterArray, Float_t vz)
3463 Int_t entries = ClusterArray->GetEntriesFast();
3464 if (entries<4) return;
3465 AliITSRecPoint* cluster = (AliITSRecPoint*)ClusterArray->At(0);
3466 Int_t layer = cluster->GetLayer();
3467 if (layer>1) return;
3469 Int_t ncandidates=0;
3470 Float_t r = (layer>0)? 7:4;
3472 for (Int_t i=0;i<entries;i++){
3473 AliITSRecPoint* cl0 = (AliITSRecPoint*)ClusterArray->At(i);
3474 Float_t nz = 1+TMath::Abs((cl0->GetZ()-vz)/r);
3475 if (cl0->GetNy()+cl0->GetNz()<=5+2*layer+nz) continue;
3476 index[ncandidates] = i; //candidate to belong to delta electron track
3478 if (cl0->GetNy()+cl0->GetNz()>9+2*layer+nz) {
3479 cl0->SetDeltaProbability(1);
3485 for (Int_t i=0;i<ncandidates;i++){
3486 AliITSRecPoint* cl0 = (AliITSRecPoint*)ClusterArray->At(index[i]);
3487 if (cl0->GetDeltaProbability()>0.8) continue;
3490 Float_t y[100],z[100],sumy,sumz,sumy2, sumyz, sumw;
3491 sumy=sumz=sumy2=sumyz=sumw=0.0;
3492 for (Int_t j=0;j<ncandidates;j++){
3494 AliITSRecPoint* cl1 = (AliITSRecPoint*)ClusterArray->At(index[j]);
3496 Float_t dz = cl0->GetZ()-cl1->GetZ();
3497 Float_t dy = cl0->GetY()-cl1->GetY();
3498 if (TMath::Sqrt(dz*dz+dy*dy)<0.2){
3499 Float_t weight = cl1->GetNy()+cl1->GetNz()-2;
3500 y[ncl] = cl1->GetY();
3501 z[ncl] = cl1->GetZ();
3502 sumy+= y[ncl]*weight;
3503 sumz+= z[ncl]*weight;
3504 sumy2+=y[ncl]*y[ncl]*weight;
3505 sumyz+=y[ncl]*z[ncl]*weight;
3510 if (ncl<4) continue;
3511 Float_t det = sumw*sumy2 - sumy*sumy;
3513 if (TMath::Abs(det)>0.01){
3514 Float_t z0 = (sumy2*sumz - sumy*sumyz)/det;
3515 Float_t k = (sumyz*sumw - sumy*sumz)/det;
3516 delta = TMath::Abs(cl0->GetZ()-(z0+k*cl0->GetY()));
3519 Float_t z0 = sumyz/sumy;
3520 delta = TMath::Abs(cl0->GetZ()-z0);
3523 cl0->SetDeltaProbability(1-20.*delta);
3529 void AliITStrackerMI::UpdateESDtrack(AliITStrackMI* track, ULong_t flags) const
3533 track->UpdateESDtrack(flags);
3534 AliITStrackMI * oldtrack = (AliITStrackMI*)(track->GetESDtrack()->GetITStrack());
3535 if (oldtrack) delete oldtrack;
3536 track->GetESDtrack()->SetITStrack(new AliITStrackMI(*track));
3537 if (TMath::Abs(track->GetDnorm(1))<0.000000001){
3538 printf("Problem\n");
3544 Int_t AliITStrackerMI::GetNearestLayer(const Double_t *xr) const{
3546 //Get nearest upper layer close to the point xr.
3547 // rough approximation
3549 const Float_t kRadiuses[6]={4,6.5,15.03,24.,38.5,43.7};
3550 Float_t radius = TMath::Sqrt(xr[0]*xr[0]+xr[1]*xr[1]);
3552 for (Int_t i=0;i<6;i++){
3553 if (radius<kRadiuses[i]){
3562 void AliITStrackerMI::UpdateTPCV0(AliESD *event){
3564 //try to update, or reject TPC V0s
3566 Int_t nv0s = event->GetNumberOfV0s();
3567 Int_t nitstracks = fTrackHypothesys.GetEntriesFast();
3569 for (Int_t i=0;i<nv0s;i++){
3570 AliESDv0 * vertex = event->GetV0(i);
3571 Int_t ip = vertex->GetIndex(0);
3572 Int_t im = vertex->GetIndex(1);
3574 TObjArray * arrayp = (ip<nitstracks) ? (TObjArray*)fTrackHypothesys.At(ip):0;
3575 TObjArray * arraym = (im<nitstracks) ? (TObjArray*)fTrackHypothesys.At(im):0;
3576 AliITStrackMI * trackp = (arrayp!=0) ? (AliITStrackMI*)arrayp->At(0):0;
3577 AliITStrackMI * trackm = (arraym!=0) ? (AliITStrackMI*)arraym->At(0):0;
3581 if (trackp->GetNumberOfClusters()+trackp->GetNDeadZone()>5.5){
3582 if (trackp->GetConstrain()&&trackp->GetChi2MIP(0)<3) vertex->SetStatus(-100);
3583 if (!trackp->GetConstrain()&&trackp->GetChi2MIP(0)<2) vertex->SetStatus(-100);
3588 if (trackm->GetNumberOfClusters()+trackm->GetNDeadZone()>5.5){
3589 if (trackm->GetConstrain()&&trackm->GetChi2MIP(0)<3) vertex->SetStatus(-100);
3590 if (!trackm->GetConstrain()&&trackm->GetChi2MIP(0)<2) vertex->SetStatus(-100);
3593 if (vertex->GetStatus()==-100) continue;
3595 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
3596 Int_t clayer = GetNearestLayer(xrp); //I.B.
3597 vertex->SetNBefore(clayer); //
3598 vertex->SetChi2Before(9*clayer); //
3599 vertex->SetNAfter(6-clayer); //
3600 vertex->SetChi2After(0); //
3602 if (clayer >1 ){ // calculate chi2 before vertex
3603 Float_t chi2p = 0, chi2m=0;
3606 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
3607 if (trackp->GetClIndex(ilayer)>0){
3608 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+
3609 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));
3620 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
3621 if (trackm->GetClIndex(ilayer)>0){
3622 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+
3623 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));
3632 vertex->SetChi2Before(TMath::Min(chi2p,chi2m));
3633 if (TMath::Min(chi2p,chi2m)/Float_t(clayer)<4) vertex->SetStatus(-10); // track exist before vertex
3636 if (clayer < 5 ){ // calculate chi2 after vertex
3637 Float_t chi2p = 0, chi2m=0;
3639 if (trackp&&TMath::Abs(trackp->GetTgl())<1.){
3640 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
3641 if (trackp->GetClIndex(ilayer)>0){
3642 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+
3643 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));
3653 if (trackm&&TMath::Abs(trackm->GetTgl())<1.){
3654 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
3655 if (trackm->GetClIndex(ilayer)>0){
3656 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+
3657 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));
3666 vertex->SetChi2After(TMath::Max(chi2p,chi2m));
3667 if (TMath::Max(chi2m,chi2p)/Float_t(6-clayer)>9) vertex->SetStatus(-20); // track not found in ITS
3675 void AliITStrackerMI::FindV02(AliESD *event)
3680 // Cuts on DCA - R dependent
3681 // max distance DCA between 2 tracks cut
3682 // maxDist = TMath::Min(kMaxDist,kMaxDist0+pvertex->GetRr()*kMaxDist);
3684 const Float_t kMaxDist0 = 0.1;
3685 const Float_t kMaxDist1 = 0.1;
3686 const Float_t kMaxDist = 1;
3687 const Float_t kMinPointAngle = 0.85;
3688 const Float_t kMinPointAngle2 = 0.99;
3689 const Float_t kMinR = 0.5;
3690 const Float_t kMaxR = 220;
3691 //const Float_t kCausality0Cut = 0.19;
3692 //const Float_t kLikelihood01Cut = 0.25;
3693 //const Float_t kPointAngleCut = 0.9996;
3694 const Float_t kCausality0Cut = 0.19;
3695 const Float_t kLikelihood01Cut = 0.45;
3696 const Float_t kLikelihood1Cut = 0.5;
3697 const Float_t kCombinedCut = 0.55;
3701 TTreeSRedirector &cstream = *fDebugStreamer;
3702 Int_t ntracks = event->GetNumberOfTracks();
3703 Int_t nitstracks = fTrackHypothesys.GetEntriesFast();
3704 fOriginal.Expand(ntracks);
3705 fTrackHypothesys.Expand(ntracks);
3706 fBestHypothesys.Expand(ntracks);
3708 AliHelix * helixes = new AliHelix[ntracks+2];
3709 TObjArray trackarray(ntracks+2); //array with tracks - with vertex constrain
3710 TObjArray trackarrayc(ntracks+2); //array of "best tracks" - without vertex constrain
3711 TObjArray trackarrayl(ntracks+2); //array of "longest tracks" - without vertex constrain
3712 Bool_t * forbidden = new Bool_t [ntracks+2];
3713 Int_t *itsmap = new Int_t [ntracks+2];
3714 Float_t *dist = new Float_t[ntracks+2];
3715 Float_t *normdist0 = new Float_t[ntracks+2];
3716 Float_t *normdist1 = new Float_t[ntracks+2];
3717 Float_t *normdist = new Float_t[ntracks+2];
3718 Float_t *norm = new Float_t[ntracks+2];
3719 Float_t *maxr = new Float_t[ntracks+2];
3720 Float_t *minr = new Float_t[ntracks+2];
3721 Float_t *minPointAngle= new Float_t[ntracks+2];
3723 AliV0 *pvertex = new AliV0;
3724 AliITStrackMI * dummy= new AliITStrackMI;
3726 AliITStrackMI trackat0; //temporary track for DCA calculation
3728 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
3730 // make its - esd map
3732 for (Int_t itrack=0;itrack<ntracks+2;itrack++) {
3733 itsmap[itrack] = -1;
3734 forbidden[itrack] = kFALSE;
3735 maxr[itrack] = kMaxR;
3736 minr[itrack] = kMinR;
3737 minPointAngle[itrack] = kMinPointAngle;
3739 for (Int_t itrack=0;itrack<nitstracks;itrack++){
3740 AliITStrackMI * original = (AliITStrackMI*)(fOriginal.At(itrack));
3741 Int_t esdindex = original->GetESDtrack()->GetID();
3742 itsmap[esdindex] = itrack;
3745 // create its tracks from esd tracks if not done before
3747 for (Int_t itrack=0;itrack<ntracks;itrack++){
3748 if (itsmap[itrack]>=0) continue;
3749 AliITStrackMI * tpctrack = new AliITStrackMI(*(event->GetTrack(itrack)));
3750 //tpctrack->fD[0] = tpctrack->GetD(GetX(),GetY());
3751 //tpctrack->fD[1] = tpctrack->GetZat(GetX())-GetZ();
3752 tpctrack->GetDZ(GetX(),GetY(),GetZ(),tpctrack->GetDP()); //I.B.
3753 if (tpctrack->GetD(0)<20 && tpctrack->GetD(1)<20){
3754 // tracks which can reach inner part of ITS
3755 // propagate track to outer its volume - with correction for material
3756 CorrectForDeadZoneMaterial(tpctrack);
3758 itsmap[itrack] = nitstracks;
3759 fOriginal.AddAt(tpctrack,nitstracks);
3763 // fill temporary arrays
3765 for (Int_t itrack=0;itrack<ntracks;itrack++){
3766 AliESDtrack * esdtrack = event->GetTrack(itrack);
3767 Int_t itsindex = itsmap[itrack];
3768 AliITStrackMI *original = (AliITStrackMI*)fOriginal.At(itsmap[itrack]);
3769 if (!original) continue;
3770 AliITStrackMI *bestConst = 0;
3771 AliITStrackMI *bestLong = 0;
3772 AliITStrackMI *best = 0;
3775 TObjArray * array = (TObjArray*) fTrackHypothesys.At(itsindex);
3776 Int_t hentries = (array==0) ? 0 : array->GetEntriesFast();
3777 // Get best track with vertex constrain
3778 for (Int_t ih=0;ih<hentries;ih++){
3779 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
3780 if (!trackh->GetConstrain()) continue;
3781 if (!bestConst) bestConst = trackh;
3782 if (trackh->GetNumberOfClusters()>5.0){
3783 bestConst = trackh; // full track - with minimal chi2
3786 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()) continue;
3790 // Get best long track without vertex constrain and best track without vertex constrain
3791 for (Int_t ih=0;ih<hentries;ih++){
3792 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
3793 if (trackh->GetConstrain()) continue;
3794 if (!best) best = trackh;
3795 if (!bestLong) bestLong = trackh;
3796 if (trackh->GetNumberOfClusters()>5.0){
3797 bestLong = trackh; // full track - with minimal chi2
3800 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()) continue;
3805 bestLong = original;
3807 //I.B. trackat0 = *bestLong;
3808 new (&trackat0) AliITStrackMI(*bestLong);
3809 Double_t xx,yy,zz,alpha;
3810 bestLong->GetGlobalXYZat(bestLong->GetX(),xx,yy,zz);
3811 alpha = TMath::ATan2(yy,xx);
3812 trackat0.Propagate(alpha,0);
3813 // calculate normalized distances to the vertex
3815 Float_t ptfac = (1.+100.*TMath::Abs(trackat0.GetC()));
3816 if ( bestLong->GetNumberOfClusters()>3 ){
3817 dist[itsindex] = trackat0.GetY();
3818 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
3819 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
3820 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
3821 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
3823 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<6) normdist[itsindex]*=2.;
3824 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<5) normdist[itsindex]*=2.;
3825 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<4) normdist[itsindex]*=2.;
3827 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<6) normdist[itsindex]*=1.5;
3828 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<5) normdist[itsindex]*=1.5;
3832 if (bestConst&&bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5){
3833 dist[itsindex] = bestConst->GetD(0);
3834 norm[itsindex] = bestConst->GetDnorm(0);
3835 normdist0[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
3836 normdist1[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
3837 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
3839 dist[itsindex] = trackat0.GetY();
3840 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
3841 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
3842 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
3843 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
3844 if (TMath::Abs(trackat0.GetTgl())>1.05){
3845 if (normdist[itsindex]<3) forbidden[itsindex]=kTRUE;
3846 if (normdist[itsindex]>3) {
3847 minr[itsindex] = TMath::Max(Float_t(40.),minr[itsindex]);
3853 //-----------------------------------------------------------
3854 //Forbid primary track candidates -
3856 //treetr->SetAlias("forbidden0","Tr0.fN<4&&Tr1.fN+Tr1.fNDeadZone>4.5");
3857 //treetr->SetAlias("forbidden1","ND<3&&Tr1.fN+Tr1.fNDeadZone>5.5");
3858 //treetr->SetAlias("forbidden2","ND<2&&Tr1.fClIndex[0]>0&&Tr1.fClIndex[0]>0");
3859 //treetr->SetAlias("forbidden3","ND<1&&Tr1.fClIndex[0]>0");
3860 //treetr->SetAlias("forbidden4","ND<4&&Tr1.fNormChi2[0]<2");
3861 //treetr->SetAlias("forbidden5","ND<5&&Tr1.fNormChi2[0]<1");
3862 //-----------------------------------------------------------
3864 if (bestLong->GetNumberOfClusters()<4 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5) forbidden[itsindex]=kTRUE;
3865 if (normdist[itsindex]<3 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>5.5) forbidden[itsindex]=kTRUE;
3866 if (normdist[itsindex]<2 && bestConst->GetClIndex(0)>0 && bestConst->GetClIndex(1)>0 ) forbidden[itsindex]=kTRUE;
3867 if (normdist[itsindex]<1 && bestConst->GetClIndex(0)>0) forbidden[itsindex]=kTRUE;
3868 if (normdist[itsindex]<4 && bestConst->GetNormChi2(0)<2) forbidden[itsindex]=kTRUE;
3869 if (normdist[itsindex]<5 && bestConst->GetNormChi2(0)<1) forbidden[itsindex]=kTRUE;
3870 if (bestConst->GetNormChi2(0)<2.5) {
3871 minPointAngle[itsindex]= 0.9999;
3872 maxr[itsindex] = 10;
3876 //forbid daughter kink candidates
3878 if (esdtrack->GetKinkIndex(0)>0) forbidden[itsindex] = kTRUE;
3879 Bool_t isElectron = kTRUE;
3880 Bool_t isProton = kTRUE;
3882 esdtrack->GetESDpid(pid);
3883 for (Int_t i=1;i<5;i++){
3884 if (pid[0]<pid[i]) isElectron= kFALSE;
3885 if (pid[4]<pid[i]) isProton= kFALSE;
3888 forbidden[itsindex]=kFALSE;
3889 normdist[itsindex]*=-1;
3892 if (normdist[itsindex]>2) forbidden[itsindex]=kFALSE;
3893 normdist[itsindex]*=-1;
3897 // Causality cuts in TPC volume
3899 if (esdtrack->GetTPCdensity(0,10) >0.6) maxr[itsindex] = TMath::Min(Float_t(110),maxr[itsindex]);
3900 if (esdtrack->GetTPCdensity(10,30)>0.6) maxr[itsindex] = TMath::Min(Float_t(120),maxr[itsindex]);
3901 if (esdtrack->GetTPCdensity(20,40)>0.6) maxr[itsindex] = TMath::Min(Float_t(130),maxr[itsindex]);
3902 if (esdtrack->GetTPCdensity(30,50)>0.6) maxr[itsindex] = TMath::Min(Float_t(140),maxr[itsindex]);
3904 if (esdtrack->GetTPCdensity(0,60)<0.4&&bestLong->GetNumberOfClusters()<3) minr[itsindex]=100;
3910 "Tr1.="<<((bestConst)? bestConst:dummy)<<
3912 "Tr3.="<<&trackat0<<
3914 "Dist="<<dist[itsindex]<<
3915 "ND0="<<normdist0[itsindex]<<
3916 "ND1="<<normdist1[itsindex]<<
3917 "ND="<<normdist[itsindex]<<
3918 "Pz="<<primvertex[2]<<
3919 "Forbid="<<forbidden[itsindex]<<
3923 trackarray.AddAt(best,itsindex);
3924 trackarrayc.AddAt(bestConst,itsindex);
3925 trackarrayl.AddAt(bestLong,itsindex);
3926 new (&helixes[itsindex]) AliHelix(*best);
3931 // first iterration of V0 finder
3933 for (Int_t iesd0=0;iesd0<ntracks;iesd0++){
3934 Int_t itrack0 = itsmap[iesd0];
3935 if (forbidden[itrack0]) continue;
3936 AliITStrackMI * btrack0 = (AliITStrackMI*)trackarray.At(itrack0);
3937 if (!btrack0) continue;
3938 if (btrack0->GetSign()>0) continue;
3939 AliITStrackMI *trackc0 = (AliITStrackMI*)trackarrayc.At(itrack0);
3941 for (Int_t iesd1=0;iesd1<ntracks;iesd1++){
3942 Int_t itrack1 = itsmap[iesd1];
3943 if (forbidden[itrack1]) continue;
3945 AliITStrackMI * btrack1 = (AliITStrackMI*)trackarray.At(itrack1);
3946 if (!btrack1) continue;
3947 if (btrack1->GetSign()<0) continue;
3948 Bool_t isGold = kFALSE;
3949 if (TMath::Abs(TMath::Abs(btrack0->GetLabel())-TMath::Abs(btrack1->GetLabel()))==1){
3952 AliITStrackMI *trackc1 = (AliITStrackMI*)trackarrayc.At(itrack1);
3953 AliHelix &h1 = helixes[itrack0];
3954 AliHelix &h2 = helixes[itrack1];
3956 // find linear distance
3961 Double_t phase[2][2],radius[2];
3962 Int_t points = h1.GetRPHIintersections(h2, phase, radius);
3963 if (points==0) continue;
3964 Double_t delta[2]={1000000,1000000};
3966 h1.ParabolicDCA(h2,phase[0][0],phase[0][1],radius[0],delta[0]);
3968 if (radius[1]<rmin) rmin = radius[1];
3969 h1.ParabolicDCA(h2,phase[1][0],phase[1][1],radius[1],delta[1]);
3971 rmin = TMath::Sqrt(rmin);
3972 Double_t distance = 0;
3973 Double_t radiusC = 0;
3975 if (points==1 || delta[0]<delta[1]){
3976 distance = TMath::Sqrt(delta[0]);
3977 radiusC = TMath::Sqrt(radius[0]);
3979 distance = TMath::Sqrt(delta[1]);
3980 radiusC = TMath::Sqrt(radius[1]);
3983 if (radiusC<TMath::Max(minr[itrack0],minr[itrack1])) continue;
3984 if (radiusC>TMath::Min(maxr[itrack0],maxr[itrack1])) continue;
3985 Float_t maxDist = TMath::Min(kMaxDist,Float_t(kMaxDist0+radiusC*kMaxDist1));
3986 if (distance>maxDist) continue;
3987 Float_t pointAngle = h1.GetPointAngle(h2,phase[iphase],primvertex);
3988 if (pointAngle<TMath::Max(minPointAngle[itrack0],minPointAngle[itrack1])) continue;
3991 // Double_t distance = TestV0(h1,h2,pvertex,rmin);
3993 // if (distance>maxDist) continue;
3994 // if (pvertex->GetRr()<kMinR) continue;
3995 // if (pvertex->GetRr()>kMaxR) continue;
3996 AliITStrackMI * track0=btrack0;
3997 AliITStrackMI * track1=btrack1;
3998 // if (pvertex->GetRr()<3.5){
4000 //use longest tracks inside the pipe
4001 track0 = (AliITStrackMI*)trackarrayl.At(itrack0);
4002 track1 = (AliITStrackMI*)trackarrayl.At(itrack1);
4006 pvertex->SetParamN(*track0);
4007 pvertex->SetParamP(*track1);
4008 pvertex->Update(primvertex);
4009 pvertex->SetClusters(track0->ClIndex(),track1->ClIndex()); // register clusters
4011 if (pvertex->GetRr()<kMinR) continue;
4012 if (pvertex->GetRr()>kMaxR) continue;
4013 if (pvertex->GetV0CosineOfPointingAngle()<kMinPointAngle) continue;
4014 //Bo: if (pvertex->GetDist2()>maxDist) continue;
4015 if (pvertex->GetDcaV0Daughters()>maxDist) continue;
4016 //Bo: pvertex->SetLab(0,track0->GetLabel());
4017 //Bo: pvertex->SetLab(1,track1->GetLabel());
4018 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
4019 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
4021 AliITStrackMI * htrackc0 = trackc0 ? trackc0:dummy;
4022 AliITStrackMI * htrackc1 = trackc1 ? trackc1:dummy;
4026 TObjArray * array0b = (TObjArray*)fBestHypothesys.At(itrack0);
4027 if (!array0b&&pvertex->GetRr()<40 && TMath::Abs(track0->GetTgl())<1.1)
4028 FollowProlongationTree((AliITStrackMI*)fOriginal.At(itrack0),itrack0, kFALSE);
4029 TObjArray * array1b = (TObjArray*)fBestHypothesys.At(itrack1);
4030 if (!array1b&&pvertex->GetRr()<40 && TMath::Abs(track1->GetTgl())<1.1)
4031 FollowProlongationTree((AliITStrackMI*)fOriginal.At(itrack1),itrack1, kFALSE);
4033 AliITStrackMI * track0b = (AliITStrackMI*)fOriginal.At(itrack0);
4034 AliITStrackMI * track1b = (AliITStrackMI*)fOriginal.At(itrack1);
4035 AliITStrackMI * track0l = (AliITStrackMI*)fOriginal.At(itrack0);
4036 AliITStrackMI * track1l = (AliITStrackMI*)fOriginal.At(itrack1);
4038 Float_t minchi2before0=16;
4039 Float_t minchi2before1=16;
4040 Float_t minchi2after0 =16;
4041 Float_t minchi2after1 =16;
4042 Double_t xrp[3]; pvertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
4043 Int_t maxLayer = GetNearestLayer(xrp); //I.B.
4045 if (array0b) for (Int_t i=0;i<5;i++){
4046 // best track after vertex
4047 AliITStrackMI * btrack = (AliITStrackMI*)array0b->At(i);
4048 if (!btrack) continue;
4049 if (btrack->GetNumberOfClusters()>track0l->GetNumberOfClusters()) track0l = btrack;
4050 // if (btrack->fX<pvertex->GetRr()-2.-0.5/(0.1+pvertex->GetAnglep()[2])) {
4051 if (btrack->GetX()<pvertex->GetRr()-2.) {
4052 if ( (maxLayer>i+2|| (i==0)) && btrack->GetNumberOfClusters()==(6-i)&&i<3){
4055 if (maxLayer<3){ // take prim vertex as additional measurement
4056 if (normdist[itrack0]>0 && htrackc0){
4057 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack0]*normdist[itrack0],16.);
4059 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack0]*normdist[itrack0]+3.),16.);
4063 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
4065 if (!btrack->GetClIndex(ilayer)){
4069 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
4070 for (Int_t itrack=0;itrack<4;itrack++){
4071 if (fgLayers[ilayer].GetClusterTracks(itrack,c)>=0 && fgLayers[ilayer].GetClusterTracks(itrack,c)!=itrack0){
4072 sumchi2+=18.; //shared cluster
4076 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
4077 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
4081 if (sumchi2<minchi2before0) minchi2before0=sumchi2;
4083 continue; //safety space - Geo manager will give exact layer
4086 minchi2after0 = btrack->GetNormChi2(i);
4089 if (array1b) for (Int_t i=0;i<5;i++){
4090 // best track after vertex
4091 AliITStrackMI * btrack = (AliITStrackMI*)array1b->At(i);
4092 if (!btrack) continue;
4093 if (btrack->GetNumberOfClusters()>track1l->GetNumberOfClusters()) track1l = btrack;
4094 // if (btrack->fX<pvertex->GetRr()-2-0.5/(0.1+pvertex->GetAnglep()[2])){
4095 if (btrack->GetX()<pvertex->GetRr()-2){
4096 if ((maxLayer>i+2 || (i==0))&&btrack->GetNumberOfClusters()==(6-i)&&(i<3)){
4099 if (maxLayer<3){ // take prim vertex as additional measurement
4100 if (normdist[itrack1]>0 && htrackc1){
4101 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack1]*normdist[itrack1],16.);
4103 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack1]*normdist[itrack1]+3.),16.);
4107 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
4109 if (!btrack->GetClIndex(ilayer)){
4113 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
4114 for (Int_t itrack=0;itrack<4;itrack++){
4115 if (fgLayers[ilayer].GetClusterTracks(itrack,c)>=0 && fgLayers[ilayer].GetClusterTracks(itrack,c)!=itrack1){
4116 sumchi2+=18.; //shared cluster
4120 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
4121 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
4125 if (sumchi2<minchi2before1) minchi2before1=sumchi2;
4127 continue; //safety space - Geo manager will give exact layer
4130 minchi2after1 = btrack->GetNormChi2(i);
4134 // position resolution - used for DCA cut
4135 Float_t sigmad = track0b->GetSigmaY2()+track0b->GetSigmaZ2()+track1b->GetSigmaY2()+track1b->GetSigmaZ2()+
4136 (track0b->GetX()-pvertex->GetRr())*(track0b->GetX()-pvertex->GetRr())*(track0b->GetSigmaSnp2()+track0b->GetSigmaTgl2())+
4137 (track1b->GetX()-pvertex->GetRr())*(track1b->GetX()-pvertex->GetRr())*(track1b->GetSigmaSnp2()+track1b->GetSigmaTgl2());
4138 sigmad =TMath::Sqrt(sigmad)+0.04;
4139 if (pvertex->GetRr()>50){
4140 Double_t cov0[15],cov1[15];
4141 track0b->GetESDtrack()->GetInnerExternalCovariance(cov0);
4142 track1b->GetESDtrack()->GetInnerExternalCovariance(cov1);
4143 sigmad = cov0[0]+cov0[2]+cov1[0]+cov1[2]+
4144 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov0[5]+cov0[9])+
4145 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov1[5]+cov1[9]);
4146 sigmad =TMath::Sqrt(sigmad)+0.05;
4150 vertex2.SetParamN(*track0b);
4151 vertex2.SetParamP(*track1b);
4152 vertex2.Update(primvertex);
4153 //Bo: if (vertex2.GetDist2()<=pvertex->GetDist2()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
4154 if (vertex2.GetDcaV0Daughters()<=pvertex->GetDcaV0Daughters()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
4155 pvertex->SetParamN(*track0b);
4156 pvertex->SetParamP(*track1b);
4157 pvertex->Update(primvertex);
4158 pvertex->SetClusters(track0b->ClIndex(),track1b->ClIndex()); // register clusters
4159 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
4160 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
4162 pvertex->SetDistSigma(sigmad);
4163 //Bo: pvertex->SetDistNorm(pvertex->GetDist2()/sigmad);
4164 pvertex->SetNormDCAPrim(normdist[itrack0],normdist[itrack1]);
4166 // define likelihhod and causalities
4168 Float_t pa0=1, pa1=1, pb0=0.26, pb1=0.26;
4170 Float_t fnorm0 = normdist[itrack0];
4171 if (fnorm0<0) fnorm0*=-3;
4172 Float_t fnorm1 = normdist[itrack1];
4173 if (fnorm1<0) fnorm1*=-3;
4174 if (pvertex->GetAnglep()[2]>0.1 || (pvertex->GetRr()<10.5)&& pvertex->GetAnglep()[2]>0.05 || pvertex->GetRr()<3){
4175 pb0 = TMath::Exp(-TMath::Min(fnorm0,Float_t(16.))/12.);
4176 pb1 = TMath::Exp(-TMath::Min(fnorm1,Float_t(16.))/12.);
4178 pvertex->SetChi2Before(normdist[itrack0]);
4179 pvertex->SetChi2After(normdist[itrack1]);
4180 pvertex->SetNAfter(0);
4181 pvertex->SetNBefore(0);
4183 pvertex->SetChi2Before(minchi2before0);
4184 pvertex->SetChi2After(minchi2before1);
4185 if (pvertex->GetAnglep()[2]>0.1 || ( pvertex->GetRr()<10.5 && pvertex->GetAnglep()[2]>0.05) || pvertex->GetRr()<3){
4186 pb0 = TMath::Exp(-TMath::Min(minchi2before0,Float_t(16))/12.);
4187 pb1 = TMath::Exp(-TMath::Min(minchi2before1,Float_t(16))/12.);
4189 pvertex->SetNAfter(maxLayer);
4190 pvertex->SetNBefore(maxLayer);
4192 if (pvertex->GetRr()<90){
4193 pa0 *= TMath::Min(track0->GetESDtrack()->GetTPCdensity(0,60),Float_t(1.));
4194 pa1 *= TMath::Min(track1->GetESDtrack()->GetTPCdensity(0,60),Float_t(1.));
4196 if (pvertex->GetRr()<20){
4197 pa0 *= (0.2+TMath::Exp(-TMath::Min(minchi2after0,Float_t(16))/8.))/1.2;
4198 pa1 *= (0.2+TMath::Exp(-TMath::Min(minchi2after1,Float_t(16))/8.))/1.2;
4201 pvertex->SetCausality(pb0,pb1,pa0,pa1);
4203 // Likelihood calculations - apply cuts
4205 Bool_t v0OK = kTRUE;
4206 Float_t p12 = pvertex->GetParamP()->GetParameter()[4]*pvertex->GetParamP()->GetParameter()[4];
4207 p12 += pvertex->GetParamN()->GetParameter()[4]*pvertex->GetParamN()->GetParameter()[4];
4208 p12 = TMath::Sqrt(p12); // "mean" momenta
4209 Float_t sigmap0 = 0.0001+0.001/(0.1+pvertex->GetRr());
4210 Float_t sigmap = 0.5*sigmap0*(0.6+0.4*p12); // "resolution: of point angle - as a function of radius and momenta
4212 Float_t causalityA = (1.0-pvertex->GetCausalityP()[0])*(1.0-pvertex->GetCausalityP()[1]);
4213 Float_t causalityB = TMath::Sqrt(TMath::Min(pvertex->GetCausalityP()[2],Float_t(0.7))*
4214 TMath::Min(pvertex->GetCausalityP()[3],Float_t(0.7)));
4216 //Bo: Float_t likelihood0 = (TMath::Exp(-pvertex->GetDistNorm())+0.1) *(pvertex->GetDist2()<0.5)*(pvertex->GetDistNorm()<5);
4217 Float_t lDistNorm = pvertex->GetDcaV0Daughters()/pvertex->GetDistSigma();
4218 Float_t likelihood0 = (TMath::Exp(-lDistNorm)+0.1) *(pvertex->GetDcaV0Daughters()<0.5)*(lDistNorm<5);
4220 Float_t likelihood1 = TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/sigmap)+
4221 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(4.*sigmap))+
4222 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(8.*sigmap))+
4223 0.1*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/0.01);
4225 if (causalityA<kCausality0Cut) v0OK = kFALSE;
4226 if (TMath::Sqrt(likelihood0*likelihood1)<kLikelihood01Cut) v0OK = kFALSE;
4227 if (likelihood1<kLikelihood1Cut) v0OK = kFALSE;
4228 if (TMath::Power(likelihood0*likelihood1*causalityB,0.33)<kCombinedCut) v0OK = kFALSE;
4233 Bool_t gold = TMath::Abs(TMath::Abs(track0->GetLabel())-TMath::Abs(track1->GetLabel()))==1;
4235 "Tr0.="<<track0<< //best without constrain
4236 "Tr1.="<<track1<< //best without constrain
4237 "Tr0B.="<<track0b<< //best without constrain after vertex
4238 "Tr1B.="<<track1b<< //best without constrain after vertex
4239 "Tr0C.="<<htrackc0<< //best with constrain if exist
4240 "Tr1C.="<<htrackc1<< //best with constrain if exist
4241 "Tr0L.="<<track0l<< //longest best
4242 "Tr1L.="<<track1l<< //longest best
4243 "Esd0.="<<track0->GetESDtrack()<< // esd track0 params
4244 "Esd1.="<<track1->GetESDtrack()<< // esd track1 params
4245 "V0.="<<pvertex<< //vertex properties
4246 "V0b.="<<&vertex2<< //vertex properties at "best" track
4247 "ND0="<<normdist[itrack0]<< //normalize distance for track0
4248 "ND1="<<normdist[itrack1]<< //normalize distance for track1
4250 // "RejectBase="<<rejectBase<< //rejection in First itteration
4256 //if (rejectBase) continue;
4258 pvertex->SetStatus(0);
4259 // if (rejectBase) {
4260 // pvertex->SetStatus(-100);
4262 if (pvertex->GetV0CosineOfPointingAngle()>kMinPointAngle2) {
4263 //Bo: pvertex->SetESDindexes(track0->GetESDtrack()->GetID(),track1->GetESDtrack()->GetID());
4264 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());//Bo: consistency 0 for neg
4265 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());//Bo: consistency 1 for pos
4267 // AliV0vertex vertexjuri(*track0,*track1);
4268 // vertexjuri.SetESDindexes(track0->fESDtrack->GetID(),track1->fESDtrack->GetID());
4269 // event->AddV0(&vertexjuri);
4270 pvertex->SetStatus(100);
4272 pvertex->SetOnFlyStatus(kTRUE);
4273 pvertex->ChangeMassHypothesis(kK0Short);
4274 event->AddV0(pvertex);
4280 // delete temporary arrays
4282 delete[] minPointAngle;
4296 void AliITStrackerMI::RefitV02(AliESD *event)
4299 //try to refit V0s in the third path of the reconstruction
4301 TTreeSRedirector &cstream = *fDebugStreamer;
4303 Int_t nv0s = event->GetNumberOfV0s();
4304 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
4306 for (Int_t iv0 = 0; iv0<nv0s;iv0++){
4307 AliV0 * v0mi = (AliV0*)event->GetV0(iv0);
4308 if (!v0mi) continue;
4309 Int_t itrack0 = v0mi->GetIndex(0);
4310 Int_t itrack1 = v0mi->GetIndex(1);
4311 AliESDtrack *esd0 = event->GetTrack(itrack0);
4312 AliESDtrack *esd1 = event->GetTrack(itrack1);
4313 if (!esd0||!esd1) continue;
4314 AliITStrackMI tpc0(*esd0);
4315 AliITStrackMI tpc1(*esd1);
4316 Double_t x,y,z; v0mi->GetXYZ(x,y,z); //I.B.
4317 Double_t alpha =TMath::ATan2(y,x); //I.B.
4318 if (v0mi->GetRr()>85){
4319 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
4320 v0temp.SetParamN(tpc0);
4321 v0temp.SetParamP(tpc1);
4322 v0temp.Update(primvertex);
4323 if (kFALSE) cstream<<"Refit"<<
4325 "V0refit.="<<&v0temp<<
4329 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4330 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4331 v0mi->SetParamN(tpc0);
4332 v0mi->SetParamP(tpc1);
4333 v0mi->Update(primvertex);
4338 if (v0mi->GetRr()>35){
4339 CorrectForDeadZoneMaterial(&tpc0);
4340 CorrectForDeadZoneMaterial(&tpc1);
4341 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
4342 v0temp.SetParamN(tpc0);
4343 v0temp.SetParamP(tpc1);
4344 v0temp.Update(primvertex);
4345 if (kFALSE) cstream<<"Refit"<<
4347 "V0refit.="<<&v0temp<<
4351 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4352 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4353 v0mi->SetParamN(tpc0);
4354 v0mi->SetParamP(tpc1);
4355 v0mi->Update(primvertex);
4360 CorrectForDeadZoneMaterial(&tpc0);
4361 CorrectForDeadZoneMaterial(&tpc1);
4362 // if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
4363 if (RefitAt(v0mi->GetRr(),&tpc0, v0mi->GetClusters(0)) && RefitAt(v0mi->GetRr(),&tpc1, v0mi->GetClusters(1))){
4364 v0temp.SetParamN(tpc0);
4365 v0temp.SetParamP(tpc1);
4366 v0temp.Update(primvertex);
4367 if (kFALSE) cstream<<"Refit"<<
4369 "V0refit.="<<&v0temp<<
4373 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4374 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4375 v0mi->SetParamN(tpc0);
4376 v0mi->SetParamP(tpc1);
4377 v0mi->Update(primvertex);