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 Char_t *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 const TGeoHMatrix *tm=AliITSgeomTGeo::GetTracking2LocalMatrix(i,j,k);
113 Double_t txyz[3]={0.}, xyz[3]={0.};
114 m.LocalToMaster(txyz,xyz);
115 Double_t r=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
116 Double_t phi=TMath::ATan2(xyz[1],xyz[0]);
118 if (phi<0) phi+=TMath::TwoPi();
119 else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi();
121 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
122 new(&det) AliITSdetector(r,phi);
131 fConstraint[0]=1; fConstraint[1]=0;
133 Double_t xyz[]={kXV,kYV,kZV}, ers[]={kSigmaXV,kSigmaYV,kSigmaZV};
136 for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=kLayersNotToSkip[i];
137 fLastLayerToTrackTo=kLastLayerToTrackTo;
138 for (Int_t i=0;i<100000;i++){
139 fBestTrackIndex[i]=0;
142 fDebugStreamer = new TTreeSRedirector("ITSdebug.root");
146 AliITStrackerMI::AliITStrackerMI(const AliITStrackerMI &tracker):AliTracker(tracker),
148 fBestTrack(tracker.fBestTrack),
149 fTrackToFollow(tracker.fTrackToFollow),
150 fTrackHypothesys(tracker.fTrackHypothesys),
151 fBestHypothesys(tracker.fBestHypothesys),
152 fOriginal(tracker.fOriginal),
153 fCurrentEsdTrack(tracker.fCurrentEsdTrack),
154 fPass(tracker.fPass),
155 fAfterV0(tracker.fAfterV0),
156 fLastLayerToTrackTo(tracker.fLastLayerToTrackTo),
157 fCoeficients(tracker.fCoeficients),
159 fDebugStreamer(tracker.fDebugStreamer){
163 AliITStrackerMI & AliITStrackerMI::operator=(const AliITStrackerMI &tracker){
164 //Assignment operator
165 this->~AliITStrackerMI();
166 new(this) AliITStrackerMI(tracker);
171 AliITStrackerMI::~AliITStrackerMI()
176 if (fCoeficients) delete []fCoeficients;
177 if (fDebugStreamer) {
178 //fDebugStreamer->Close();
179 delete fDebugStreamer;
183 void AliITStrackerMI::SetLayersNotToSkip(Int_t *l) {
184 //--------------------------------------------------------------------
185 //This function set masks of the layers which must be not skipped
186 //--------------------------------------------------------------------
187 for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=l[i];
190 Int_t AliITStrackerMI::LoadClusters(TTree *cTree) {
191 //--------------------------------------------------------------------
192 //This function loads ITS clusters
193 //--------------------------------------------------------------------
194 TBranch *branch=cTree->GetBranch("ITSRecPoints");
196 Error("LoadClusters"," can't get the branch !\n");
200 TClonesArray dummy("AliITSRecPoint",10000), *clusters=&dummy;
201 branch->SetAddress(&clusters);
205 for (Int_t i=0; i<kMaxLayer; i++) {
206 Int_t ndet=fgLayers[i].GetNdetectors();
207 Int_t jmax = j + fgLayers[i].GetNladders()*ndet;
208 for (; j<jmax; j++) {
209 if (!cTree->GetEvent(j)) continue;
210 Int_t ncl=clusters->GetEntriesFast();
211 SignDeltas(clusters,GetZ());
214 AliITSRecPoint *c=(AliITSRecPoint*)clusters->UncheckedAt(ncl);
215 detector=c->GetDetectorIndex();
217 if (!c->Misalign()) AliWarning("Can't misalign this cluster !");
219 fgLayers[i].InsertCluster(new AliITSRecPoint(*c));
222 //add dead zone virtual "cluster"
224 for (Float_t ydead = 0; ydead < 1.31 ; ydead+=(i+1.)*0.018){
225 Int_t lab[4] = {0,0,0,detector};
226 Int_t info[3] = {0,0,i};
227 Float_t hit[5]={0,0,0.004/12.,0.001/12.,0};
228 if (i==0) hit[0] =ydead-0.4;
229 if (i==1) hit[0]=ydead-3.75;
231 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
232 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
234 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
235 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
237 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
238 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
240 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
241 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
243 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
244 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
246 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
247 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
253 fgLayers[i].ResetRoad(); //road defined by the cluster density
254 fgLayers[i].SortClusters();
260 void AliITStrackerMI::UnloadClusters() {
261 //--------------------------------------------------------------------
262 //This function unloads ITS clusters
263 //--------------------------------------------------------------------
264 for (Int_t i=0; i<kMaxLayer; i++) fgLayers[i].ResetClusters();
267 static Int_t CorrectForDeadZoneMaterial(AliITStrackMI *t) {
268 //--------------------------------------------------------------------
269 // Correction for the material between the TPC and the ITS
270 // (should it belong to the TPC code ?)
271 //--------------------------------------------------------------------
272 Double_t riw=80., diw=0.0053, x0iw=30; // TPC inner wall ?
273 Double_t rcd=61., dcd=0.0053, x0cd=30; // TPC "central drum" ?
274 Double_t yr=12.8, dr=0.03; // rods ?
275 Double_t zm=0.2, dm=0.40; // membrane
276 //Double_t rr=52., dr=0.19, x0r=24., yyr=7.77; //rails
277 Double_t rs=50., ds=0.001; // something belonging to the ITS (screen ?)
279 if (t->GetX() > riw) {
280 if (!t->PropagateTo(riw,diw,x0iw)) return 1;
281 if (TMath::Abs(t->GetY())>yr) t->CorrectForMaterial(dr);
282 if (TMath::Abs(t->GetZ())<zm) t->CorrectForMaterial(dm);
283 if (!t->PropagateTo(rcd,dcd,x0cd)) return 1;
284 //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z);
285 //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,dr,x0r);
286 if (!t->PropagateTo(rs,ds)) return 1;
287 } else if (t->GetX() < rs) {
288 if (!t->PropagateTo(rs,-ds)) return 1;
289 //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z);
290 //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,-dr,x0r);
291 if (!t->PropagateTo(rcd,-dcd,x0cd)) return 1;
292 if (!t->PropagateTo(riw+0.001,-diw,x0iw)) return 1;
294 ::Error("CorrectForDeadZoneMaterial","track is already in the dead zone !");
301 Int_t AliITStrackerMI::Clusters2Tracks(AliESD *event) {
302 //--------------------------------------------------------------------
303 // This functions reconstructs ITS tracks
304 // The clusters must be already loaded !
305 //--------------------------------------------------------------------
306 TObjArray itsTracks(15000);
308 fEsd = event; // store pointer to the esd
309 {/* Read ESD tracks */
310 Int_t nentr=event->GetNumberOfTracks();
311 Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr);
313 AliESDtrack *esd=event->GetTrack(nentr);
315 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue;
316 if (esd->GetStatus()&AliESDtrack::kTPCout) continue;
317 if (esd->GetStatus()&AliESDtrack::kITSin) continue;
318 if (esd->GetKinkIndex(0)>0) continue; //kink daughter
321 t=new AliITStrackMI(*esd);
322 } catch (const Char_t *msg) {
323 //Warning("Clusters2Tracks",msg);
327 //t->fD[0] = t->GetD(GetX(),GetY());
328 //t->fD[1] = t->GetZat(GetX())-GetZ();
329 t->GetDZ(GetX(),GetY(),GetZ(),t->GetDP()); //I.B.
330 Double_t vdist = TMath::Sqrt(t->GetD(0)*t->GetD(0)+t->GetD(1)*t->GetD(1));
331 if (t->GetMass()<0.13) t->SetMass(0.13957); // MI look to the esd - mass hypothesys !!!!!!!!!!!
333 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
335 if (esd->GetV0Index(0)>0 && t->GetD(0)<30){
336 //track - can be V0 according to TPC
339 if (TMath::Abs(t->GetD(0))>10) {
344 if (TMath::Abs(vdist)>20) {
348 if (TMath::Abs(1/t->Get1Pt())<0.120) {
353 if (CorrectForDeadZoneMaterial(t)!=0) {
354 //Warning("Clusters2Tracks",
355 // "failed to correct for the material in the dead zone !\n");
360 t->SetReconstructed(kFALSE);
361 itsTracks.AddLast(t);
362 fOriginal.AddLast(t);
364 } /* End Read ESD tracks */
368 Int_t nentr=itsTracks.GetEntriesFast();
369 fTrackHypothesys.Expand(nentr);
370 fBestHypothesys.Expand(nentr);
371 MakeCoeficients(nentr);
373 for (fPass=0; fPass<2; fPass++) {
374 Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
375 for (Int_t i=0; i<nentr; i++) {
376 // cerr<<fPass<<" "<<i<<'\r';
377 fCurrentEsdTrack = i;
378 AliITStrackMI *t=(AliITStrackMI*)itsTracks.UncheckedAt(i);
379 if (t==0) continue; //this track has been already tracked
380 if (t->GetReconstructed()&&(t->GetNUsed()<1.5)) continue; //this track was already "succesfully" reconstructed
381 //if ( (TMath::Abs(t->GetD(GetX(),GetY())) >3.) && fConstraint[fPass]) continue;
382 //if ( (TMath::Abs(t->GetZat(GetX())-GetZ())>3.) && fConstraint[fPass]) continue;
383 Float_t dz[2]; t->GetDZ(GetX(),GetY(),GetZ(),dz); //I.B.
384 if ( (TMath::Abs(dz[0])>3.) && fConstraint[fPass]) continue;
385 if ( (TMath::Abs(dz[1])>3.) && fConstraint[fPass]) continue;
387 Int_t tpcLabel=t->GetLabel(); //save the TPC track label
389 ResetTrackToFollow(*t);
391 FollowProlongationTree(t,i,fConstraint[fPass]);
393 SortTrackHypothesys(fCurrentEsdTrack,20,0); //MI change
395 AliITStrackMI * besttrack = GetBestHypothesys(fCurrentEsdTrack,t,15);
396 if (!besttrack) continue;
397 besttrack->SetLabel(tpcLabel);
398 // besttrack->CookdEdx();
400 besttrack->SetFakeRatio(1.);
401 CookLabel(besttrack,0.); //For comparison only
402 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
405 if ( besttrack->GetNumberOfClusters()<6 && fConstraint[fPass]) {
408 if (besttrack->fChi2MIP[0]+besttrack->fNUsed>3.5) continue;
409 if ( (TMath::Abs(besttrack->fD[0]*besttrack->fD[0]+besttrack->fD[1]*besttrack->fD[1])>0.1) && fConstraint[fPass]) continue;
410 //delete itsTracks.RemoveAt(i);
412 if (fConstraint[fPass]&&(!besttrack->IsGoldPrimary())) continue; //to be tracked also without vertex constrain
415 t->SetReconstructed(kTRUE);
418 GetBestHypothesysMIP(itsTracks);
421 //GetBestHypothesysMIP(itsTracks);
425 //GetBestHypothesysMIP(itsTracks);
429 Int_t entries = fTrackHypothesys.GetEntriesFast();
430 for (Int_t ientry=0;ientry<entries;ientry++){
431 TObjArray * array =(TObjArray*)fTrackHypothesys.UncheckedAt(ientry);
432 if (array) array->Delete();
433 delete fTrackHypothesys.RemoveAt(ientry);
436 fTrackHypothesys.Delete();
437 fBestHypothesys.Delete();
439 delete []fCoeficients;
441 Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk);
447 Int_t AliITStrackerMI::PropagateBack(AliESD *event) {
448 //--------------------------------------------------------------------
449 // This functions propagates reconstructed ITS tracks back
450 // The clusters must be loaded !
451 //--------------------------------------------------------------------
452 Int_t nentr=event->GetNumberOfTracks();
453 Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
456 for (Int_t i=0; i<nentr; i++) {
457 AliESDtrack *esd=event->GetTrack(i);
459 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
460 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
464 t=new AliITStrackMI(*esd);
465 } catch (const Char_t *msg) {
466 //Warning("PropagateBack",msg);
470 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
472 ResetTrackToFollow(*t);
474 // propagete to vertex [SR, GSI 17.02.2003]
475 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
476 if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {
477 if (fTrackToFollow.PropagateToVertex(event->GetVertex())) {
478 fTrackToFollow.StartTimeIntegral();
480 fTrackToFollow.PropagateTo(3.,-0.0028,65.19);
483 fTrackToFollow.ResetCovariance(10.); fTrackToFollow.ResetClusters();
484 if (RefitAt(49.,&fTrackToFollow,t)) {
485 if (CorrectForDeadZoneMaterial(&fTrackToFollow)!=0) {
486 //Warning("PropagateBack",
487 // "failed to correct for the material in the dead zone !\n");
491 fTrackToFollow.SetLabel(t->GetLabel());
492 //fTrackToFollow.CookdEdx();
493 CookLabel(&fTrackToFollow,0.); //For comparison only
494 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
495 //UseClusters(&fTrackToFollow);
501 Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk);
506 Int_t AliITStrackerMI::RefitInward(AliESD *event) {
507 //--------------------------------------------------------------------
508 // This functions refits ITS tracks using the
509 // "inward propagated" TPC tracks
510 // The clusters must be loaded !
511 //--------------------------------------------------------------------
513 Int_t nentr=event->GetNumberOfTracks();
514 Info("RefitInward", "Number of ESD tracks: %d\n", nentr);
517 for (Int_t i=0; i<nentr; i++) {
518 AliESDtrack *esd=event->GetTrack(i);
520 if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
521 if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
522 if (esd->GetStatus()&AliESDtrack::kTPCout)
523 if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
527 t=new AliITStrackMI(*esd);
528 } catch (const Char_t *msg) {
529 //Warning("RefitInward",msg);
533 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
534 if (CorrectForDeadZoneMaterial(t)!=0) {
535 //Warning("RefitInward",
536 // "failed to correct for the material in the dead zone !\n");
541 ResetTrackToFollow(*t);
542 fTrackToFollow.ResetClusters();
544 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
545 fTrackToFollow.ResetCovariance(10.);
548 if (RefitAt(3.7, &fTrackToFollow, t,kTRUE)) {
549 fTrackToFollow.SetLabel(t->GetLabel());
550 // fTrackToFollow.CookdEdx();
551 CookdEdx(&fTrackToFollow);
553 CookLabel(&fTrackToFollow,0.0); //For comparison only
555 if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {//The beam pipe
556 AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack();
557 esdTrack->UpdateTrackParams(&fTrackToFollow,AliESDtrack::kITSrefit);
558 Float_t r[3]={0.,0.,0.};
560 esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD);
567 Info("RefitInward","Number of refitted tracks: %d\n",ntrk);
572 AliCluster *AliITStrackerMI::GetCluster(Int_t index) const {
573 //--------------------------------------------------------------------
574 // Return pointer to a given cluster
575 //--------------------------------------------------------------------
576 Int_t l=(index & 0xf0000000) >> 28;
577 Int_t c=(index & 0x0fffffff) >> 00;
578 return fgLayers[l].GetCluster(c);
581 #include "TGeoManager.h"
582 #include "TGeoMatrix.h"
583 #include "TGeoPhysicalNode.h"
585 Bool_t AliITStrackerMI::GetTrackPoint(Int_t index, AliTrackPoint& p) const {
587 // Get track space point with index i
589 Int_t l=(index & 0xf0000000) >> 28;
590 Int_t c=(index & 0x0fffffff) >> 00;
591 AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
592 Int_t idet = cl->GetDetectorIndex();
594 const char* name = AliAlignObj::SymName((AliAlignObj::ELayerID)
595 (l+AliAlignObj::kFirstLayer), idet);
596 TGeoPNEntry *mapPN = gGeoManager->GetAlignableEntry(name);
598 if (!mapPN) return kFALSE;
599 TGeoPhysicalNode *node = mapPN->GetPhysicalNode();
601 gGeoManager->MakeAlignablePN(name);
602 node = mapPN->GetPhysicalNode();
604 if (!node) return kFALSE;
605 TGeoHMatrix* matrix = node->GetMatrix();
606 if (!matrix) return kFALSE;
609 // Calculate the global coordinates
611 Double_t localCoord[] = {cl->GetDetLocalX(), 0, cl->GetDetLocalZ()};
612 // LG AliAlignObj makes life simple but keep in mind that alignable
613 // LG volume doesn't mean sensitive volume. There might be a shift
614 // LG between the 2, has it is here for the SPD :
615 if (l<2) localCoord[1] = 0.01;
616 // LG !!! Check for this when the new geometry comes !!!
617 Double_t globalCoord[3] = {0};
618 matrix->LocalToMaster(localCoord, globalCoord);
619 Float_t xyz[3]= {globalCoord[0], globalCoord[1], globalCoord[2]};
622 // Calculate the cov matrix
624 TGeoRotation rotMatrix(*matrix);
625 TGeoRotation rotMatrixTr(rotMatrix.Inverse());
626 Double_t sigmaArray[] = {cl->GetSigmaY2(),0,0, 0,0,0, 0,0,cl->GetSigmaZ2()};
627 TGeoRotation sigmMatrix;
628 sigmMatrix.SetMatrix( sigmaArray );
629 sigmMatrix.MultiplyBy(&rotMatrixTr, kFALSE);
630 sigmMatrix.MultiplyBy(&rotMatrix, kTRUE);
631 const Double_t *globalSigma = sigmMatrix.GetRotationMatrix();
632 Float_t cov[6]= { globalSigma[0], globalSigma[1], globalSigma[2],
633 globalSigma[4], globalSigma[5],
636 p.SetXYZ(xyz[0],xyz[1],xyz[2],cov);
637 AliAlignObj::ELayerID iLayer = AliAlignObj::kInvalidLayer;
640 iLayer = AliAlignObj::kSPD1;
643 iLayer = AliAlignObj::kSPD2;
646 iLayer = AliAlignObj::kSDD1;
649 iLayer = AliAlignObj::kSDD2;
652 iLayer = AliAlignObj::kSSD1;
655 iLayer = AliAlignObj::kSSD2;
658 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
661 UShort_t volid = AliAlignObj::LayerToVolUID(iLayer,idet);
662 p.SetVolumeID((UShort_t)volid);
666 void AliITStrackerMI::FollowProlongationTree(AliITStrackMI * otrack, Int_t esdindex, Bool_t constrain)
668 //--------------------------------------------------------------------
669 // Follow prolongation tree
670 //--------------------------------------------------------------------
672 AliESDtrack * esd = otrack->GetESDtrack();
673 if (esd->GetV0Index(0)>0){
675 // TEMPORARY SOLLUTION: map V0 indexes to point to proper track
676 // mapping of esd track is different as its track in Containers
677 // Need something more stable
678 // Indexes are set back againg to the ESD track indexes in UpdateTPCV0
679 for (Int_t i=0;i<3;i++){
680 Int_t index = esd->GetV0Index(i);
682 AliESDv0 * vertex = fEsd->GetV0(index);
683 if (vertex->GetStatus()<0) continue; // rejected V0
685 if (esd->GetSign()>0) {
686 vertex->SetIndex(0,esdindex);
689 vertex->SetIndex(1,esdindex);
693 TObjArray *bestarray = (TObjArray*)fBestHypothesys.At(esdindex);
695 bestarray = new TObjArray(5);
696 fBestHypothesys.AddAt(bestarray,esdindex);
700 //setup tree of the prolongations
702 static AliITStrackMI tracks[7][100];
703 AliITStrackMI *currenttrack;
704 static AliITStrackMI currenttrack1;
705 static AliITStrackMI currenttrack2;
706 static AliITStrackMI backuptrack;
708 Int_t nindexes[7][100];
709 Float_t normalizedchi2[100];
710 for (Int_t ilayer=0;ilayer<6;ilayer++) ntracks[ilayer]=0;
711 otrack->SetNSkipped(0);
712 new (&(tracks[6][0])) AliITStrackMI(*otrack);
714 for (Int_t i=0;i<7;i++) nindexes[i][0]=0;
717 // follow prolongations
718 for (Int_t ilayer=5;ilayer>=0;ilayer--){
720 AliITSlayer &layer=fgLayers[ilayer];
721 Double_t r=layer.GetR();
727 for (Int_t itrack =0;itrack<ntracks[ilayer+1];itrack++){
729 if (ntracks[ilayer]>=100) break;
730 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0) nskipped++;
731 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2.) nused++;
732 if (ntracks[ilayer]>15+ilayer){
733 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0 && nskipped>4+ilayer) continue;
734 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2. && nused>3) continue;
737 new(¤ttrack1) AliITStrackMI(tracks[ilayer+1][nindexes[ilayer+1][itrack]]);
738 if (ilayer==3 || ilayer==1) {
739 Double_t rs=0.5*(fgLayers[ilayer+1].GetR() + r);
740 Double_t d=0.0034, x0=38.6;
741 if (ilayer==1) {rs=9.; d=0.0097; x0=42;}
742 if (!currenttrack1.PropagateTo(rs,d,x0)) {
747 //find intersection with layer
749 if (!currenttrack1.GetGlobalXYZat(r,x,y,z)) {
752 Double_t phi=TMath::ATan2(y,x);
753 Int_t idet=layer.FindDetectorIndex(phi,z);
757 //propagate to the intersection
758 const AliITSdetector &det=layer.GetDetector(idet);
760 new(¤ttrack2) AliITStrackMI(currenttrack1);
761 if (!currenttrack1.Propagate(phi,det.GetR())) {
764 currenttrack2.Propagate(phi,det.GetR()); //
765 currenttrack1.SetDetectorIndex(idet);
766 currenttrack2.SetDetectorIndex(idet);
770 Double_t dz=7.5*TMath::Sqrt(currenttrack1.GetSigmaZ2() + 16.*kSigmaZ2[ilayer]);
771 Double_t dy=7.5*TMath::Sqrt(currenttrack1.GetSigmaY2() + 16.*kSigmaY2[ilayer]);
773 Bool_t isBoundary=kFALSE;
774 if (currenttrack1.GetY()-dy< det.GetYmin()+0.2) isBoundary = kTRUE;
775 if (currenttrack1.GetY()+dy> det.GetYmax()-0.2) isBoundary = kTRUE;
776 if (currenttrack1.GetZ()-dz< det.GetZmin()+0.2) isBoundary = kTRUE;
777 if (currenttrack1.GetZ()+dz> det.GetZmax()-0.2) isBoundary = kTRUE;
779 if (isBoundary){ // track at boundary between detectors
780 Float_t maxtgl = TMath::Abs(currenttrack1.GetTgl());
781 if (maxtgl>1) maxtgl=1;
782 dz = TMath::Sqrt(dz*dz+0.25*maxtgl*maxtgl);
784 Float_t maxsnp = TMath::Abs(currenttrack1.GetSnp());
785 if (maxsnp>0.95) continue;
786 //if (maxsnp>0.5) maxsnp=0.5;
787 dy=TMath::Sqrt(dy*dy+0.25*maxsnp*maxsnp);
790 Double_t zmin=currenttrack1.GetZ() - dz;
791 Double_t zmax=currenttrack1.GetZ() + dz;
792 Double_t ymin=currenttrack1.GetY() + r*phi - dy;
793 Double_t ymax=currenttrack1.GetY() + r*phi + dy;
794 layer.SelectClusters(zmin,zmax,ymin,ymax);
796 // loop over all possible prolongations
798 Double_t msz=1./((currenttrack1.GetSigmaZ2() + 16.*kSigmaZ2[ilayer]));
799 Double_t msy=1./((currenttrack1.GetSigmaY2() + 16.*kSigmaY2[ilayer]));
807 const AliITSRecPoint *c=0; Int_t ci=-1;
808 Double_t chi2=12345.;
810 currenttrack = ¤ttrack1;
811 while ((c=layer.GetNextCluster(ci))!=0) {
812 if (ntracks[ilayer]>95) break; //space for skipped clusters
813 Bool_t change =kFALSE;
814 if (c->GetQ()==0 && (deadzone==1)) continue;
815 Int_t idet=c->GetDetectorIndex();
816 if (currenttrack->GetDetectorIndex()!=idet) {
817 const AliITSdetector &det=layer.GetDetector(idet);
819 if (!currenttrack2.GetProlongationFast(det.GetPhi(),det.GetR(),y,z)) continue;
820 Float_t pz = (z - c->GetZ()) , py=(y - c->GetY());
821 if (pz*pz*msz+py*py*msy>1.) continue;
823 new (&backuptrack) AliITStrackMI(currenttrack2);
825 currenttrack =¤ttrack2;
826 if (!currenttrack->Propagate(det.GetPhi(),det.GetR())) {
827 new (currenttrack) AliITStrackMI(backuptrack);
831 currenttrack->SetDetectorIndex(idet);
834 Float_t pz = (currenttrack->GetZ() - c->GetZ()) , py=(currenttrack->GetY() - c->GetY());
835 if (pz*pz*msz+py*py*msy>1.) continue;
838 chi2=GetPredictedChi2MI(currenttrack,c,ilayer);
839 if (chi2<kMaxChi2s[ilayer]){
840 if (c->GetQ()==0) deadzone=1; // take dead zone only once
841 if (ntracks[ilayer]>=100) continue;
842 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
843 updatetrack->SetClIndex(ilayer,0);
845 new (¤ttrack2) AliITStrackMI(backuptrack);
848 if (!UpdateMI(updatetrack,c,chi2,(ilayer<<28)+ci)) continue;
849 updatetrack->SetSampledEdx(c->GetQ(),updatetrack->GetNumberOfClusters()-1); //b.b.
852 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
853 updatetrack->SetDeadZoneProbability(GetDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
856 updatetrack->IncrementNUsed();
859 Double_t d=layer.GetThickness(updatetrack->GetY(),updatetrack->GetZ(),x0);
860 updatetrack->CorrectForMaterial(d,x0);
862 updatetrack->SetConstrain(constrain);
864 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
865 Double_t xyz[]={GetX(),GetY(),GetZ()};
866 Double_t ptfactor = 1;
867 Double_t ers[]={GetSigmaX()*ptfactor,GetSigmaY()*ptfactor,GetSigmaZ()};
868 Bool_t isPrim = kTRUE;
870 //updatetrack->fD[0] = updatetrack->GetD(GetX(),GetY());
871 //updatetrack->fD[1] = updatetrack->GetZat(GetX())-GetZ();
872 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
873 if ( TMath::Abs(updatetrack->GetD(0)/(1.+ilayer))>0.4 || TMath::Abs(updatetrack->GetD(1)/(1.+ilayer))>0.4) isPrim=kFALSE;
875 if (isPrim) updatetrack->Improve(d,xyz,ers);
876 } //apply vertex constrain
878 } // create new hypothesy
879 } // loop over possible cluster prolongation
880 // if (constrain&&itrack<2&¤ttrack1.fNSkipped==0 && deadzone==0){
881 if (constrain&&itrack<2&¤ttrack1.GetNSkipped()==0 && deadzone==0&&ntracks[ilayer]<100){
882 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
883 vtrack->SetClIndex(ilayer,0);
885 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
886 Double_t xyz[]={GetX(),GetY(),GetZ()};
887 Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
888 vtrack->Improve(d,xyz,ers);
889 vtrack->IncrementNSkipped();
893 if (constrain&&itrack<1&&TMath::Abs(currenttrack1.GetTgl())>1.1){ //big theta -- for low mult. runs
894 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
895 vtrack->SetClIndex(ilayer,0);
897 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
898 Double_t xyz[]={GetX(),GetY(),GetZ()};
899 Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
900 vtrack->Improve(d,xyz,ers);
901 vtrack->SetNDeadZone(vtrack->GetNDeadZone()+1);
906 } //loop over track candidates
912 for (Int_t itrack=0;itrack<ntracks[ilayer];itrack++){
913 normalizedchi2[itrack] = NormalizedChi2(&tracks[ilayer][itrack],ilayer);
914 if ( normalizedchi2[itrack]<3+0.5*ilayer) golds++;
915 if (ilayer>4) accepted++;
917 if ( constrain && normalizedchi2[itrack]<kMaxNormChi2C[ilayer]+1) accepted++;
918 if (!constrain && normalizedchi2[itrack]<kMaxNormChi2NonC[ilayer]+1) accepted++;
921 TMath::Sort(ntracks[ilayer],normalizedchi2,nindexes[ilayer],kFALSE);
922 ntracks[ilayer] = TMath::Min(accepted,7+2*ilayer);
923 if (ntracks[ilayer]<golds+2+ilayer) ntracks[ilayer]=TMath::Min(golds+2+ilayer,accepted);
924 if (ntracks[ilayer]>90) ntracks[ilayer]=90;
926 //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]);
927 Int_t max = constrain? 20: 5;
929 for (Int_t i=0;i<TMath::Min(max,ntracks[0]);i++) {
930 AliITStrackMI & track= tracks[0][nindexes[0][i]];
931 if (track.GetNumberOfClusters()<2) continue;
932 if (!constrain&&track.GetNormChi2(0)>7.)continue;
933 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
935 for (Int_t i=0;i<TMath::Min(2,ntracks[1]);i++) {
936 AliITStrackMI & track= tracks[1][nindexes[1][i]];
937 if (track.GetNumberOfClusters()<4) continue;
938 if (!constrain&&track.GetNormChi2(1)>7.)continue;
939 if (constrain) track.IncrementNSkipped();
941 track.SetD(0,track.GetD(GetX(),GetY()));
942 track.SetNSkipped(track.GetNSkipped()+4./(4.+8.*TMath::Abs(track.GetD(0))));
943 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
944 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
947 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
952 for (Int_t i=0;i<TMath::Min(2,ntracks[2]);i++) {
953 AliITStrackMI & track= tracks[2][nindexes[2][i]];
954 if (track.GetNumberOfClusters()<3) continue;
955 if (!constrain&&track.GetNormChi2(2)>7.)continue;
956 if (constrain) track.SetNSkipped(track.GetNSkipped()+2);
958 track.SetD(0,track.GetD(GetX(),GetY()));
959 track.SetNSkipped(track.GetNSkipped()+7./(7.+8.*TMath::Abs(track.GetD(0))));
960 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
961 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
964 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
970 // register best tracks - important for V0 finder
972 for (Int_t ilayer=0;ilayer<5;ilayer++){
973 if (ntracks[ilayer]==0) continue;
974 AliITStrackMI & track= tracks[ilayer][nindexes[ilayer][0]];
975 if (track.GetNumberOfClusters()<1) continue;
977 bestarray->AddAt(new AliITStrackMI(track),ilayer);
981 // update TPC V0 information
983 if (otrack->GetESDtrack()->GetV0Index(0)>0){
984 Float_t fprimvertex[3]={GetX(),GetY(),GetZ()};
985 for (Int_t i=0;i<3;i++){
986 Int_t index = otrack->GetESDtrack()->GetV0Index(i);
988 AliV0 * vertex = (AliV0*)fEsd->GetV0(index);
989 if (vertex->GetStatus()<0) continue; // rejected V0
991 if (otrack->GetSign()>0) {
992 vertex->SetIndex(0,esdindex);
995 vertex->SetIndex(1,esdindex);
997 //find nearest layer with track info
998 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
999 Int_t nearestold = GetNearestLayer(xrp); //I.B.
1000 Int_t nearest = nearestold;
1001 for (Int_t ilayer =nearest;ilayer<8;ilayer++){
1002 if (ntracks[nearest]==0){
1007 AliITStrackMI & track= tracks[nearest][nindexes[nearest][0]];
1008 if (nearestold<5&&nearest<5){
1009 Bool_t accept = track.GetNormChi2(nearest)<10;
1011 if (track.GetSign()>0) {
1012 vertex->SetParamP(track);
1013 vertex->Update(fprimvertex);
1014 // vertex->SetIndex(0,track.fESDtrack->GetID());
1015 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1017 vertex->SetParamN(track);
1018 vertex->Update(fprimvertex);
1019 //vertex->SetIndex(1,track.fESDtrack->GetID());
1020 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1022 vertex->SetStatus(vertex->GetStatus()+1);
1024 // vertex->SetStatus(-2); // reject V0 - not enough clusters
1027 // if (nearestold>3){
1028 // Int_t indexlayer = (ntracks[0]>0)? 0:1;
1029 // if (ntracks[indexlayer]>0){
1030 // AliITStrackMI & track= tracks[indexlayer][nindexes[indexlayer][0]];
1031 // if (track.GetNumberOfClusters()>4&&track.fNormChi2[indexlayer]<4){
1032 // vertex->SetStatus(-1); // reject V0 - clusters before
1041 AliITStrackerMI::AliITSlayer & AliITStrackerMI::GetLayer(Int_t layer) const
1043 //--------------------------------------------------------------------
1046 return fgLayers[layer];
1049 AliITStrackerMI::AliITSlayer::AliITSlayer():
1074 //--------------------------------------------------------------------
1075 //default AliITSlayer constructor
1076 //--------------------------------------------------------------------
1077 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
1078 fClusterWeight[i]=0;
1079 fClusterTracks[0][i]=-1;
1080 fClusterTracks[1][i]=-1;
1081 fClusterTracks[2][i]=-1;
1082 fClusterTracks[3][i]=-1;
1086 AliITStrackerMI::AliITSlayer::
1087 AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd):
1112 //--------------------------------------------------------------------
1113 //main AliITSlayer constructor
1114 //--------------------------------------------------------------------
1115 fDetectors=new AliITSdetector[fNladders*fNdetectors];
1116 fRoad=2*fR*TMath::Sqrt(3.14/1.);//assuming that there's only one cluster
1119 AliITStrackerMI::AliITSlayer::AliITSlayer(const AliITSlayer& layer):
1121 fPhiOffset(layer.fPhiOffset),
1122 fNladders(layer.fNladders),
1123 fZOffset(layer.fZOffset),
1124 fNdetectors(layer.fNdetectors),
1125 fDetectors(layer.fDetectors),
1130 fClustersCs(layer.fClustersCs),
1131 fClusterIndexCs(layer.fClusterIndexCs),
1135 fCurrentSlice(layer.fCurrentSlice),
1142 fAccepted(layer.fAccepted),
1148 AliITStrackerMI::AliITSlayer::~AliITSlayer() {
1149 //--------------------------------------------------------------------
1150 // AliITSlayer destructor
1151 //--------------------------------------------------------------------
1152 delete[] fDetectors;
1153 for (Int_t i=0; i<fN; i++) delete fClusters[i];
1154 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
1155 fClusterWeight[i]=0;
1156 fClusterTracks[0][i]=-1;
1157 fClusterTracks[1][i]=-1;
1158 fClusterTracks[2][i]=-1;
1159 fClusterTracks[3][i]=-1;
1163 void AliITStrackerMI::AliITSlayer::ResetClusters() {
1164 //--------------------------------------------------------------------
1165 // This function removes loaded clusters
1166 //--------------------------------------------------------------------
1167 for (Int_t i=0; i<fN; i++) delete fClusters[i];
1168 for (Int_t i=0; i<kMaxClusterPerLayer;i++){
1169 fClusterWeight[i]=0;
1170 fClusterTracks[0][i]=-1;
1171 fClusterTracks[1][i]=-1;
1172 fClusterTracks[2][i]=-1;
1173 fClusterTracks[3][i]=-1;
1180 void AliITStrackerMI::AliITSlayer::ResetWeights() {
1181 //--------------------------------------------------------------------
1182 // This function reset weights of the clusters
1183 //--------------------------------------------------------------------
1184 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
1185 fClusterWeight[i]=0;
1186 fClusterTracks[0][i]=-1;
1187 fClusterTracks[1][i]=-1;
1188 fClusterTracks[2][i]=-1;
1189 fClusterTracks[3][i]=-1;
1191 for (Int_t i=0; i<fN;i++) {
1192 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster(i);
1193 if (cl&&cl->IsUsed()) cl->Use();
1198 void AliITStrackerMI::AliITSlayer::ResetRoad() {
1199 //--------------------------------------------------------------------
1200 // This function calculates the road defined by the cluster density
1201 //--------------------------------------------------------------------
1203 for (Int_t i=0; i<fN; i++) {
1204 if (TMath::Abs(fClusters[i]->GetZ())<fR) n++;
1206 //if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n);
1207 if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n);
1211 Int_t AliITStrackerMI::AliITSlayer::InsertCluster(AliITSRecPoint *c) {
1212 //--------------------------------------------------------------------
1213 //This function adds a cluster to this layer
1214 //--------------------------------------------------------------------
1215 if (fN==kMaxClusterPerLayer) {
1216 ::Error("InsertCluster","Too many clusters !\n");
1222 AliITSdetector &det=GetDetector(c->GetDetectorIndex());
1223 if (c->GetY()<det.GetYmin()) det.SetYmin(c->GetY());
1224 if (c->GetY()>det.GetYmax()) det.SetYmax(c->GetY());
1225 if (c->GetZ()<det.GetZmin()) det.SetZmin(c->GetZ());
1226 if (c->GetZ()>det.GetZmax()) det.SetZmax(c->GetZ());
1231 void AliITStrackerMI::AliITSlayer::SortClusters()
1236 AliITSRecPoint **clusters = new AliITSRecPoint*[fN];
1237 Float_t *z = new Float_t[fN];
1238 Int_t * index = new Int_t[fN];
1240 for (Int_t i=0;i<fN;i++){
1241 z[i] = fClusters[i]->GetZ();
1243 TMath::Sort(fN,z,index,kFALSE);
1244 for (Int_t i=0;i<fN;i++){
1245 clusters[i] = fClusters[index[i]];
1248 for (Int_t i=0;i<fN;i++){
1249 fClusters[i] = clusters[i];
1250 fZ[i] = fClusters[i]->GetZ();
1251 AliITSdetector &det=GetDetector(fClusters[i]->GetDetectorIndex());
1252 Double_t y=fR*det.GetPhi() + fClusters[i]->GetY();
1253 if (y>2.*fR*TMath::Pi()) y -= 2.*fR*TMath::Pi();
1263 for (Int_t i=0;i<fN;i++){
1264 if (fY[i]<fYB[0]) fYB[0]=fY[i];
1265 if (fY[i]>fYB[1]) fYB[1]=fY[i];
1266 fClusterIndex[i] = i;
1270 fDy5 = (fYB[1]-fYB[0])/5.;
1271 fDy10 = (fYB[1]-fYB[0])/10.;
1272 fDy20 = (fYB[1]-fYB[0])/20.;
1273 for (Int_t i=0;i<6;i++) fN5[i] =0;
1274 for (Int_t i=0;i<11;i++) fN10[i]=0;
1275 for (Int_t i=0;i<21;i++) fN20[i]=0;
1277 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;}
1278 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;}
1279 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;}
1282 for (Int_t i=0;i<fN;i++)
1283 for (Int_t irot=-1;irot<=1;irot++){
1284 Float_t curY = fY[i]+irot*TMath::TwoPi()*fR;
1286 for (Int_t slice=0; slice<6;slice++){
1287 if (fBy5[slice][0]<curY && curY<fBy5[slice][1]&&fN5[slice]<kMaxClusterPerLayer5){
1288 fClusters5[slice][fN5[slice]] = fClusters[i];
1289 fY5[slice][fN5[slice]] = curY;
1290 fZ5[slice][fN5[slice]] = fZ[i];
1291 fClusterIndex5[slice][fN5[slice]]=i;
1296 for (Int_t slice=0; slice<11;slice++){
1297 if (fBy10[slice][0]<curY && curY<fBy10[slice][1]&&fN10[slice]<kMaxClusterPerLayer10){
1298 fClusters10[slice][fN10[slice]] = fClusters[i];
1299 fY10[slice][fN10[slice]] = curY;
1300 fZ10[slice][fN10[slice]] = fZ[i];
1301 fClusterIndex10[slice][fN10[slice]]=i;
1306 for (Int_t slice=0; slice<21;slice++){
1307 if (fBy20[slice][0]<curY && curY<fBy20[slice][1]&&fN20[slice]<kMaxClusterPerLayer20){
1308 fClusters20[slice][fN20[slice]] = fClusters[i];
1309 fY20[slice][fN20[slice]] = curY;
1310 fZ20[slice][fN20[slice]] = fZ[i];
1311 fClusterIndex20[slice][fN20[slice]]=i;
1318 // consistency check
1320 for (Int_t i=0;i<fN-1;i++){
1326 for (Int_t slice=0;slice<21;slice++)
1327 for (Int_t i=0;i<fN20[slice]-1;i++){
1328 if (fZ20[slice][i]>fZ20[slice][i+1]){
1337 Int_t AliITStrackerMI::AliITSlayer::FindClusterIndex(Float_t z) const {
1338 //--------------------------------------------------------------------
1339 // This function returns the index of the nearest cluster
1340 //--------------------------------------------------------------------
1343 if (fCurrentSlice<0) {
1352 if (ncl==0) return 0;
1353 Int_t b=0, e=ncl-1, m=(b+e)/2;
1354 for (; b<e; m=(b+e)/2) {
1355 // if (z > fClusters[m]->GetZ()) b=m+1;
1356 if (z > zcl[m]) b=m+1;
1363 void AliITStrackerMI::AliITSlayer::
1364 SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1365 //--------------------------------------------------------------------
1366 // This function sets the "window"
1367 //--------------------------------------------------------------------
1369 Double_t circle=2*TMath::Pi()*fR;
1370 fYmin = ymin; fYmax =ymax;
1371 Float_t ymiddle = (fYmin+fYmax)*0.5;
1372 if (ymiddle<fYB[0]) {fYmin+=circle; fYmax+=circle;ymiddle+=circle;}
1374 if (ymiddle>fYB[1]) {fYmin-=circle; fYmax-=circle;ymiddle-=circle;}
1379 fClustersCs = fClusters;
1380 fClusterIndexCs = fClusterIndex;
1386 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy20){
1387 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy20);
1388 if (slice<0) slice=0;
1389 if (slice>20) slice=20;
1390 Bool_t isOK = (fYmin>fBy20[slice][0]&&fYmax<fBy20[slice][1]);
1392 fCurrentSlice=slice;
1393 fClustersCs = fClusters20[fCurrentSlice];
1394 fClusterIndexCs = fClusterIndex20[fCurrentSlice];
1395 fYcs = fY20[fCurrentSlice];
1396 fZcs = fZ20[fCurrentSlice];
1397 fNcs = fN20[fCurrentSlice];
1402 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy10){
1403 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy10);
1404 if (slice<0) slice=0;
1405 if (slice>10) slice=10;
1406 Bool_t isOK = (fYmin>fBy10[slice][0]&&fYmax<fBy10[slice][1]);
1408 fCurrentSlice=slice;
1409 fClustersCs = fClusters10[fCurrentSlice];
1410 fClusterIndexCs = fClusterIndex10[fCurrentSlice];
1411 fYcs = fY10[fCurrentSlice];
1412 fZcs = fZ10[fCurrentSlice];
1413 fNcs = fN10[fCurrentSlice];
1418 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy5){
1419 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy5);
1420 if (slice<0) slice=0;
1421 if (slice>5) slice=5;
1422 Bool_t isOK = (fYmin>fBy5[slice][0]&&fYmax<fBy5[slice][1]);
1424 fCurrentSlice=slice;
1425 fClustersCs = fClusters5[fCurrentSlice];
1426 fClusterIndexCs = fClusterIndex5[fCurrentSlice];
1427 fYcs = fY5[fCurrentSlice];
1428 fZcs = fZ5[fCurrentSlice];
1429 fNcs = fN5[fCurrentSlice];
1433 fI=FindClusterIndex(zmin); fZmax=zmax;
1434 fImax = TMath::Min(FindClusterIndex(zmax)+1,fNcs);
1442 Int_t AliITStrackerMI::AliITSlayer::
1443 FindDetectorIndex(Double_t phi, Double_t z) const {
1444 //--------------------------------------------------------------------
1445 //This function finds the detector crossed by the track
1446 //--------------------------------------------------------------------
1447 Double_t dphi=-(phi-fPhiOffset);
1448 if (dphi < 0) dphi += 2*TMath::Pi();
1449 else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi();
1450 Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5);
1451 if (np>=fNladders) np-=fNladders;
1452 if (np<0) np+=fNladders;
1454 Double_t dz=fZOffset-z;
1455 Int_t nz=Int_t(dz*(fNdetectors-1)*0.5/fZOffset+0.5);
1456 if (nz>=fNdetectors) return -1;
1457 if (nz<0) return -1;
1459 return np*fNdetectors + nz;
1463 const AliITSRecPoint *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci){
1464 //--------------------------------------------------------------------
1465 // This function returns clusters within the "window"
1466 //--------------------------------------------------------------------
1468 if (fCurrentSlice<0){
1469 Double_t rpi2 = 2.*fR*TMath::Pi();
1470 for (Int_t i=fI; i<fImax; i++) {
1472 if (fYmax<y) y -= rpi2;
1473 if (fYmin>y) y += rpi2;
1474 if (y<fYmin) continue;
1475 if (y>fYmax) continue;
1476 if (fClusters[i]->GetQ()==0&&fSkip==2) continue;
1479 return fClusters[i];
1483 for (Int_t i=fI; i<fImax; i++) {
1484 if (fYcs[i]<fYmin) continue;
1485 if (fYcs[i]>fYmax) continue;
1486 if (fClustersCs[i]->GetQ()==0&&fSkip==2) continue;
1487 ci=fClusterIndexCs[i];
1489 return fClustersCs[i];
1497 Double_t AliITStrackerMI::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0)
1499 //--------------------------------------------------------------------
1500 //This function returns the layer thickness at this point (units X0)
1501 //--------------------------------------------------------------------
1504 if (43<fR&&fR<45) { //SSD2
1507 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1508 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1509 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1510 for (Int_t i=0; i<12; i++) {
1511 if (TMath::Abs(z-3.9*(i+0.5))<0.15) {
1512 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1516 if (TMath::Abs(z+3.9*(i+0.5))<0.15) {
1517 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1521 if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1522 if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1525 if (37<fR&&fR<41) { //SSD1
1528 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1529 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1530 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1531 for (Int_t i=0; i<11; i++) {
1532 if (TMath::Abs(z-3.9*i)<0.15) {
1533 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1537 if (TMath::Abs(z+3.9*i)<0.15) {
1538 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1542 if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1543 if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1546 if (13<fR&&fR<26) { //SDD
1549 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1551 if (TMath::Abs(y-1.80)<0.55) {
1553 for (Int_t j=0; j<20; j++) {
1554 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1555 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1558 if (TMath::Abs(y+1.80)<0.55) {
1560 for (Int_t j=0; j<20; j++) {
1561 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1562 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1566 for (Int_t i=0; i<4; i++) {
1567 if (TMath::Abs(z-7.3*i)<0.60) {
1569 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1572 if (TMath::Abs(z+7.3*i)<0.60) {
1574 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1579 if (6<fR&&fR<8) { //SPD2
1580 Double_t dd=0.0063; x0=21.5;
1582 if (TMath::Abs(y-3.08)>0.5) d+=dd;
1583 //if (TMath::Abs(y-3.08)>0.45) d+=dd;
1584 if (TMath::Abs(y-3.03)<0.10) {d+=0.014;}
1586 if (3<fR&&fR<5) { //SPD1
1587 Double_t dd=0.0063; x0=21.5;
1589 if (TMath::Abs(y+0.21)>0.6) d+=dd;
1590 //if (TMath::Abs(y+0.21)>0.45) d+=dd;
1591 if (TMath::Abs(y+0.10)<0.10) {d+=0.014;}
1597 Double_t AliITStrackerMI::GetEffectiveThickness(Double_t y,Double_t z) const
1599 //--------------------------------------------------------------------
1600 //Returns the thickness between the current layer and the vertex (units X0)
1601 //--------------------------------------------------------------------
1602 Double_t d=0.0028*3*3; //beam pipe
1605 Double_t xn=fgLayers[fI].GetR();
1606 for (Int_t i=0; i<fI; i++) {
1607 Double_t xi=fgLayers[i].GetR();
1608 d+=fgLayers[i].GetThickness(y,z,x0)*xi*xi;
1617 Double_t xi=0.5*(fgLayers[3].GetR()+fgLayers[4].GetR());
1624 Int_t AliITStrackerMI::AliITSlayer::InRoad() const {
1625 //--------------------------------------------------------------------
1626 // This function returns number of clusters within the "window"
1627 //--------------------------------------------------------------------
1629 for (Int_t i=fI; i<fN; i++) {
1630 const AliITSRecPoint *c=fClusters[i];
1631 if (c->GetZ() > fZmax) break;
1632 if (c->IsUsed()) continue;
1633 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
1634 Double_t y=fR*det.GetPhi() + c->GetY();
1636 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
1637 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
1639 if (y<fYmin) continue;
1640 if (y>fYmax) continue;
1646 Bool_t AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *t,
1647 const AliITStrackMI *c, Bool_t extra) {
1648 //--------------------------------------------------------------------
1649 // This function refits the track "t" at the position "x" using
1650 // the clusters from "c"
1651 // If "extra"==kTRUE,
1652 // the clusters from overlapped modules get attached to "t"
1653 //--------------------------------------------------------------------
1654 Int_t index[kMaxLayer];
1656 for (k=0; k<kMaxLayer; k++) index[k]=-1;
1657 Int_t nc=c->GetNumberOfClusters();
1658 for (k=0; k<nc; k++) {
1659 Int_t idx=c->GetClusterIndex(k),nl=(idx&0xf0000000)>>28;
1663 Int_t from, to, step;
1664 if (xx > t->GetX()) {
1665 from=0; to=kMaxLayer;
1668 from=kMaxLayer-1; to=-1;
1672 for (Int_t i=from; i != to; i += step) {
1673 AliITSlayer &layer=fgLayers[i];
1674 Double_t r=layer.GetR();
1677 Double_t hI=i-0.5*step;
1678 if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) {
1679 Double_t rs=0.5*(fgLayers[i-step].GetR() + r);
1680 Double_t d=0.0034, x0=38.6;
1681 if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;}
1682 if (!t->PropagateTo(rs,-step*d,x0)) {
1688 // remember old position [SR, GSI 18.02.2003]
1689 Double_t oldX=0., oldY=0., oldZ=0.;
1690 if (t->IsStartedTimeIntegral() && step==1) {
1691 t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ);
1696 if (!t->GetGlobalXYZat(r,x,y,z)) {
1699 Double_t phi=TMath::ATan2(y,x);
1700 Int_t idet=layer.FindDetectorIndex(phi,z);
1704 const AliITSdetector &det=layer.GetDetector(idet);
1706 if (!t->Propagate(phi,det.GetR())) {
1709 t->SetDetectorIndex(idet);
1711 const AliITSRecPoint *cl=0;
1712 Double_t maxchi2=1000.*kMaxChi2;
1716 const AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(idx);
1718 if (idet != c->GetDetectorIndex()) {
1719 idet=c->GetDetectorIndex();
1720 const AliITSdetector &det=layer.GetDetector(idet);
1721 if (!t->Propagate(det.GetPhi(),det.GetR())) {
1724 t->SetDetectorIndex(idet);
1726 //Double_t chi2=t->GetPredictedChi2(c);
1727 Int_t layer = (idx & 0xf0000000) >> 28;;
1728 Double_t chi2=GetPredictedChi2MI(t,c,layer);
1739 //if (!t->Update(cl,maxchi2,idx)) {
1740 if (!UpdateMI(t,cl,maxchi2,idx)) {
1743 t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
1748 Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0);
1749 t->CorrectForMaterial(-step*d,x0);
1752 if (extra) { //search for extra clusters
1753 AliITStrackV2 tmp(*t);
1754 Double_t dz=4*TMath::Sqrt(tmp.GetSigmaZ2()+kSigmaZ2[i]);
1755 if (dz < 0.5*TMath::Abs(tmp.GetTgl())) dz=0.5*TMath::Abs(tmp.GetTgl());
1756 Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+kSigmaY2[i]);
1757 if (dy < 0.5*TMath::Abs(tmp.GetSnp())) dy=0.5*TMath::Abs(tmp.GetSnp());
1758 Double_t zmin=t->GetZ() - dz;
1759 Double_t zmax=t->GetZ() + dz;
1760 Double_t ymin=t->GetY() + phi*r - dy;
1761 Double_t ymax=t->GetY() + phi*r + dy;
1762 layer.SelectClusters(zmin,zmax,ymin,ymax);
1764 const AliITSRecPoint *c=0; Int_t ci=-1,cci=-1;
1765 Double_t maxchi2=1000.*kMaxChi2, tolerance=0.1;
1766 while ((c=layer.GetNextCluster(ci))!=0) {
1767 if (idet == c->GetDetectorIndex()) continue;
1769 const AliITSdetector &det=layer.GetDetector(c->GetDetectorIndex());
1771 if (!tmp.Propagate(det.GetPhi(),det.GetR())) continue;
1773 if (TMath::Abs(tmp.GetZ() - c->GetZ()) > tolerance) continue;
1774 if (TMath::Abs(tmp.GetY() - c->GetY()) > tolerance) continue;
1776 Double_t chi2=tmp.GetPredictedChi2(c);
1777 if (chi2<maxchi2) { maxchi2=chi2; cci=ci; }
1779 if (cci>=0) t->SetExtraCluster(i,(i<<28)+cci);
1782 // track time update [SR, GSI 17.02.2003]
1783 if (t->IsStartedTimeIntegral() && step==1) {
1784 Double_t newX, newY, newZ;
1785 t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
1786 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
1787 (oldZ-newZ)*(oldZ-newZ);
1788 t->AddTimeStep(TMath::Sqrt(dL2));
1794 if (!t->PropagateTo(xx,0.,0.)) return kFALSE;
1799 AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *t,const Int_t *clindex) {
1800 //--------------------------------------------------------------------
1801 // This function refits the track "t" at the position "x" using
1802 // the clusters from array
1803 //--------------------------------------------------------------------
1804 Int_t index[kMaxLayer];
1806 for (k=0; k<kMaxLayer; k++) index[k]=-1;
1808 for (k=0; k<kMaxLayer; k++) {
1809 index[k]=clindex[k];
1812 Int_t from, to, step;
1813 if (xx > t->GetX()) {
1814 from=0; to=kMaxLayer;
1817 from=kMaxLayer-1; to=-1;
1821 for (Int_t i=from; i != to; i += step) {
1822 AliITSlayer &layer=fgLayers[i];
1823 Double_t r=layer.GetR();
1824 if (step<0 && xx>r) break; //
1826 Double_t hI=i-0.5*step;
1827 if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) {
1828 Double_t rs=0.5*(fgLayers[i-step].GetR() + r);
1829 Double_t d=0.0034, x0=38.6;
1830 if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;}
1831 if (!t->PropagateTo(rs,-step*d,x0)) {
1837 // remember old position [SR, GSI 18.02.2003]
1838 Double_t oldX=0., oldY=0., oldZ=0.;
1839 if (t->IsStartedTimeIntegral() && step==1) {
1840 t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ);
1845 if (!t->GetGlobalXYZat(r,x,y,z)) {
1848 Double_t phi=TMath::ATan2(y,x);
1849 Int_t idet=layer.FindDetectorIndex(phi,z);
1853 const AliITSdetector &det=layer.GetDetector(idet);
1855 if (!t->Propagate(phi,det.GetR())) {
1858 t->SetDetectorIndex(idet);
1860 const AliITSRecPoint *cl=0;
1861 Double_t maxchi2=1000.*kMaxChi2;
1865 const AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(idx);
1867 if (idet != c->GetDetectorIndex()) {
1868 idet=c->GetDetectorIndex();
1869 const AliITSdetector &det=layer.GetDetector(idet);
1870 if (!t->Propagate(det.GetPhi(),det.GetR())) {
1873 t->SetDetectorIndex(idet);
1875 //Double_t chi2=t->GetPredictedChi2(c);
1876 Int_t layer = (idx & 0xf0000000) >> 28;;
1877 Double_t chi2=GetPredictedChi2MI(t,c,layer);
1888 if (t->GetNumberOfClusters()>2) {
1889 Double_t dz=4*TMath::Sqrt(t->GetSigmaZ2()+kSigmaZ2[i]);
1890 Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+kSigmaY2[i]);
1891 Double_t zmin=t->GetZ() - dz;
1892 Double_t zmax=t->GetZ() + dz;
1893 Double_t ymin=t->GetY() + phi*r - dy;
1894 Double_t ymax=t->GetY() + phi*r + dy;
1895 layer.SelectClusters(zmin,zmax,ymin,ymax);
1897 const AliITSRecPoint *c=0; Int_t ci=-1;
1898 while ((c=layer.GetNextCluster(ci))!=0) {
1899 if (idet != c->GetDetectorIndex()) continue;
1900 Double_t chi2=t->GetPredictedChi2(c);
1901 if (chi2<maxchi2) { cl=c; maxchi2=chi2; idx=ci; }
1906 //if (!t->Update(cl,maxchi2,idx)) {
1907 if (!UpdateMI(t,cl,maxchi2,idx)) {
1910 t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
1915 Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0);
1916 t->CorrectForMaterial(-step*d,x0);
1919 // track time update [SR, GSI 17.02.2003]
1920 if (t->IsStartedTimeIntegral() && step==1) {
1921 Double_t newX, newY, newZ;
1922 t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
1923 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
1924 (oldZ-newZ)*(oldZ-newZ);
1925 t->AddTimeStep(TMath::Sqrt(dL2));
1931 if (!t->PropagateTo(xx,0.,0.)) return kFALSE;
1935 Double_t AliITStrackerMI::GetNormalizedChi2(AliITStrackMI * track, Int_t mode)
1938 // calculate normalized chi2
1939 // return NormalizedChi2(track,0);
1942 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
1943 // track->fdEdxMismatch=0;
1944 Float_t dedxmismatch =0;
1945 Float_t *ny = GetNy(fCurrentEsdTrack), *nz = GetNz(fCurrentEsdTrack);
1947 for (Int_t i = 0;i<6;i++){
1948 if (track->GetClIndex(i)>0){
1949 Float_t cerry, cerrz;
1950 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1952 { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
1955 Float_t cchi2 = (track->GetDy(i)*track->GetDy(i)/cerry)+(track->GetDz(i)*track->GetDz(i)/cerrz);
1957 Float_t ratio = track->GetNormQ(i)/track->GetExpQ();
1959 cchi2+=(0.5-ratio)*10.;
1960 //track->fdEdxMismatch+=(0.5-ratio)*10.;
1961 dedxmismatch+=(0.5-ratio)*10.;
1965 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster( track->GetClIndex(i));
1966 Double_t delta = cl->GetNy()+cl->GetNz()-ny[i]-nz[i];
1967 if (delta>1) chi2 +=0.5*TMath::Min(delta/2,2.);
1968 if (i<2) chi2+=2*cl->GetDeltaProbability();
1974 if (TMath::Abs(track->GetdEdxMismatch()-dedxmismatch)>0.0001){
1975 track->SetdEdxMismatch(dedxmismatch);
1979 for (Int_t i = 0;i<4;i++){
1980 if (track->GetClIndex(i)>0){
1981 Float_t cerry, cerrz;
1982 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1983 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
1986 chi2+= (track->GetDy(i)*track->GetDy(i)/cerry);
1987 chi2+= (track->GetDz(i)*track->GetDz(i)/cerrz);
1991 for (Int_t i = 4;i<6;i++){
1992 if (track->GetClIndex(i)>0){
1993 Float_t cerry, cerrz;
1994 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1995 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
1998 Float_t cerryb, cerrzb;
1999 if (ny[i+6]>0) {cerryb = erry[i+6]; cerrzb=errz[i+6];}
2000 else { cerryb= track->GetSigmaY(i+6); cerrzb = track->GetSigmaZ(i+6);}
2003 chi2+= TMath::Min((track->GetDy(i+6)*track->GetDy(i+6)/cerryb),track->GetDy(i)*track->GetDy(i)/cerry);
2004 chi2+= TMath::Min((track->GetDz(i+6)*track->GetDz(i+6)/cerrzb),track->GetDz(i)*track->GetDz(i)/cerrz);
2009 if (track->GetESDtrack()->GetTPCsignal()>85){
2010 Float_t ratio = track->GetdEdx()/track->GetESDtrack()->GetTPCsignal();
2012 chi2+=(0.5-ratio)*5.;
2015 chi2+=(ratio-2.0)*3;
2019 Double_t match = TMath::Sqrt(track->GetChi22());
2020 if (track->GetConstrain()) match/=track->GetNumberOfClusters();
2021 if (!track->GetConstrain()) match/=track->GetNumberOfClusters()-2.;
2022 if (match<0) match=0;
2023 Float_t deadzonefactor = (track->GetNDeadZone()>0) ? 3*(1.1-track->GetDeadZoneProbability()):0.;
2024 Double_t normchi2 = 2*track->GetNSkipped()+match+deadzonefactor+(1+(2*track->GetNSkipped()+deadzonefactor)/track->GetNumberOfClusters())*
2025 (chi2)/TMath::Max(double(sum-track->GetNSkipped()),
2026 1./(1.+track->GetNSkipped()));
2032 Double_t AliITStrackerMI::GetMatchingChi2(AliITStrackMI * track1, AliITStrackMI * track2)
2035 // return matching chi2 between two tracks
2036 AliITStrackMI track3(*track2);
2037 track3.Propagate(track1->GetAlpha(),track1->GetX());
2039 vec(0,0)=track1->GetY() - track3.GetY();
2040 vec(1,0)=track1->GetZ() - track3.GetZ();
2041 vec(2,0)=track1->GetSnp() - track3.GetSnp();
2042 vec(3,0)=track1->GetTgl() - track3.GetTgl();
2043 vec(4,0)=track1->Get1Pt() - track3.Get1Pt();
2046 cov(0,0) = track1->GetSigmaY2()+track3.GetSigmaY2();
2047 cov(1,1) = track1->GetSigmaZ2()+track3.GetSigmaZ2();
2048 cov(2,2) = track1->GetSigmaSnp2()+track3.GetSigmaSnp2();
2049 cov(3,3) = track1->GetSigmaTgl2()+track3.GetSigmaTgl2();
2050 cov(4,4) = track1->GetSigma1Pt2()+track3.GetSigma1Pt2();
2052 cov(0,1)=cov(1,0) = track1->GetSigmaZY()+track3.GetSigmaZY();
2053 cov(0,2)=cov(2,0) = track1->GetSigmaSnpY()+track3.GetSigmaSnpY();
2054 cov(0,3)=cov(3,0) = track1->GetSigmaTglY()+track3.GetSigmaTglY();
2055 cov(0,4)=cov(4,0) = track1->GetSigma1PtY()+track3.GetSigma1PtY();
2057 cov(1,2)=cov(2,1) = track1->GetSigmaSnpZ()+track3.GetSigmaSnpZ();
2058 cov(1,3)=cov(3,1) = track1->GetSigmaTglZ()+track3.GetSigmaTglZ();
2059 cov(1,4)=cov(4,1) = track1->GetSigma1PtZ()+track3.GetSigma1PtZ();
2061 cov(2,3)=cov(3,2) = track1->GetSigmaTglSnp()+track3.GetSigmaTglSnp();
2062 cov(2,4)=cov(4,2) = track1->GetSigma1PtSnp()+track3.GetSigma1PtSnp();
2064 cov(3,4)=cov(4,3) = track1->GetSigma1PtTgl()+track3.GetSigma1PtTgl();
2067 TMatrixD vec2(cov,TMatrixD::kMult,vec);
2068 TMatrixD chi2(vec2,TMatrixD::kTransposeMult,vec);
2072 Double_t AliITStrackerMI::GetDeadZoneProbability(Double_t zpos, Double_t zerr)
2075 // return probability that given point - characterized by z position and error is in dead zone
2077 Double_t probability =0;
2078 Double_t absz = TMath::Abs(zpos);
2079 Double_t nearestz = (absz<2)? 0.:7.1;
2080 if (TMath::Abs(absz-nearestz)>0.25+3*zerr) return 0;
2081 Double_t zmin=0, zmax=0;
2083 zmin = -7.25; zmax = -6.95;
2086 zmin = 7.0; zmax =7.3;
2089 zmin = -0.75; zmax = 1.5;
2091 probability = (TMath::Erf((zpos-zmin)/zerr) - TMath::Erf((zpos-zmax)/zerr))*0.5;
2096 Double_t AliITStrackerMI::GetTruncatedChi2(AliITStrackMI * track, Float_t fac)
2099 // calculate normalized chi2
2101 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2103 for (Int_t i = 0;i<6;i++){
2104 if (TMath::Abs(track->GetDy(i))>0){
2105 chi2[i]= (track->GetDy(i)/erry[i])*(track->GetDy(i)/erry[i]);
2106 chi2[i]+= (track->GetDz(i)/errz[i])*(track->GetDz(i)/errz[i]);
2109 else{chi2[i]=10000;}
2112 TMath::Sort(6,chi2,index,kFALSE);
2113 Float_t max = float(ncl)*fac-1.;
2114 Float_t sumchi=0, sumweight=0;
2115 for (Int_t i=0;i<max+1;i++){
2116 Float_t weight = (i<max)?1.:(max+1.-i);
2117 sumchi+=weight*chi2[index[i]];
2120 Double_t normchi2 = sumchi/sumweight;
2125 Double_t AliITStrackerMI::GetInterpolatedChi2(AliITStrackMI * forwardtrack, AliITStrackMI * backtrack)
2128 // calculate normalized chi2
2129 // if (forwardtrack->fNUsed>0.3*float(forwardtrack->GetNumberOfClusters())) return 10000;
2132 for (Int_t i=0;i<6;i++){
2133 if ( (backtrack->GetSigmaY(i)<0.000000001) || (forwardtrack->GetSigmaY(i)<0.000000001)) continue;
2134 Double_t sy1 = forwardtrack->GetSigmaY(i);
2135 Double_t sz1 = forwardtrack->GetSigmaZ(i);
2136 Double_t sy2 = backtrack->GetSigmaY(i);
2137 Double_t sz2 = backtrack->GetSigmaZ(i);
2138 if (i<2){ sy2=1000.;sz2=1000;}
2140 Double_t dy0 = (forwardtrack->GetDy(i)/(sy1*sy1) +backtrack->GetDy(i)/(sy2*sy2))/(1./(sy1*sy1)+1./(sy2*sy2));
2141 Double_t dz0 = (forwardtrack->GetDz(i)/(sz1*sz1) +backtrack->GetDz(i)/(sz2*sz2))/(1./(sz1*sz1)+1./(sz2*sz2));
2143 Double_t nz0 = dz0*TMath::Sqrt((1./(sz1*sz1)+1./(sz2*sz2)));
2144 Double_t ny0 = dy0*TMath::Sqrt((1./(sy1*sy1)+1./(sy2*sy2)));
2146 res+= nz0*nz0+ny0*ny0;
2149 if (npoints>1) return
2150 TMath::Max(TMath::Abs(0.3*forwardtrack->Get1Pt())-0.5,0.)+
2151 //2*forwardtrack->fNUsed+
2152 res/TMath::Max(double(npoints-forwardtrack->GetNSkipped()),
2153 1./(1.+forwardtrack->GetNSkipped()));
2161 Float_t *AliITStrackerMI::GetWeight(Int_t index) {
2162 //--------------------------------------------------------------------
2163 // Return pointer to a given cluster
2164 //--------------------------------------------------------------------
2165 Int_t l=(index & 0xf0000000) >> 28;
2166 Int_t c=(index & 0x0fffffff) >> 00;
2167 return fgLayers[l].GetWeight(c);
2170 void AliITStrackerMI::RegisterClusterTracks(AliITStrackMI* track,Int_t id)
2172 //---------------------------------------------
2173 // register track to the list
2175 if (track->GetESDtrack()->GetKinkIndex(0)!=0) return; //don't register kink tracks
2178 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2179 Int_t index = track->GetClusterIndex(icluster);
2180 Int_t l=(index & 0xf0000000) >> 28;
2181 Int_t c=(index & 0x0fffffff) >> 00;
2182 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2183 for (Int_t itrack=0;itrack<4;itrack++){
2184 if (fgLayers[l].GetClusterTracks(itrack,c)<0){
2185 fgLayers[l].SetClusterTracks(itrack,c,id);
2191 void AliITStrackerMI::UnRegisterClusterTracks(AliITStrackMI* track, Int_t id)
2193 //---------------------------------------------
2194 // unregister track from the list
2195 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2196 Int_t index = track->GetClusterIndex(icluster);
2197 Int_t l=(index & 0xf0000000) >> 28;
2198 Int_t c=(index & 0x0fffffff) >> 00;
2199 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2200 for (Int_t itrack=0;itrack<4;itrack++){
2201 if (fgLayers[l].GetClusterTracks(itrack,c)==id){
2202 fgLayers[l].SetClusterTracks(itrack,c,-1);
2207 Float_t AliITStrackerMI::GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSRecPoint *clist[6])
2209 //-------------------------------------------------------------
2210 //get number of shared clusters
2211 //-------------------------------------------------------------
2213 for (Int_t i=0;i<6;i++) { list[i]=-1, clist[i]=0;}
2214 // mean number of clusters
2215 Float_t *ny = GetNy(id), *nz = GetNz(id);
2218 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2219 Int_t index = track->GetClusterIndex(icluster);
2220 Int_t l=(index & 0xf0000000) >> 28;
2221 Int_t c=(index & 0x0fffffff) >> 00;
2222 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2224 printf("problem\n");
2226 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2230 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
2231 if (l>2&&track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
2233 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2236 deltan = (cl->GetNz()-nz[l]);
2238 if (deltan>2.0) continue; // extended - highly probable shared cluster
2239 weight = 2./TMath::Max(3.+deltan,2.);
2241 for (Int_t itrack=0;itrack<4;itrack++){
2242 if (fgLayers[l].GetClusterTracks(itrack,c)>=0 && fgLayers[l].GetClusterTracks(itrack,c)!=id){
2244 clist[l] = (AliITSRecPoint*)GetCluster(index);
2250 track->SetNUsed(shared);
2254 Int_t AliITStrackerMI::GetOverlapTrack(AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6],Int_t overlist[6])
2257 // find first shared track
2259 // mean number of clusters
2260 Float_t *ny = GetNy(trackID), *nz = GetNz(trackID);
2262 for (Int_t i=0;i<6;i++) overlist[i]=-1;
2263 Int_t sharedtrack=100000;
2264 Int_t tracks[24],trackindex=0;
2265 for (Int_t i=0;i<24;i++) {tracks[i]=-1;}
2267 for (Int_t icluster=0;icluster<6;icluster++){
2268 if (clusterlist[icluster]<0) continue;
2269 Int_t index = clusterlist[icluster];
2270 Int_t l=(index & 0xf0000000) >> 28;
2271 Int_t c=(index & 0x0fffffff) >> 00;
2273 printf("problem\n");
2275 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2276 //if (l>3) continue;
2277 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2280 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
2281 if (l>2&&track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
2283 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2286 deltan = (cl->GetNz()-nz[l]);
2288 if (deltan>2.0) continue; // extended - highly probable shared cluster
2290 for (Int_t itrack=3;itrack>=0;itrack--){
2291 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2292 if (fgLayers[l].GetClusterTracks(itrack,c)!=trackID){
2293 tracks[trackindex] = fgLayers[l].GetClusterTracks(itrack,c);
2298 if (trackindex==0) return -1;
2300 sharedtrack = tracks[0];
2302 if (trackindex==2) sharedtrack =TMath::Min(tracks[0],tracks[1]);
2305 Int_t track[24], cluster[24];
2306 for (Int_t i=0;i<trackindex;i++){ track[i]=-1; cluster[i]=0;}
2309 for (Int_t i=0;i<trackindex;i++){
2310 if (tracks[i]<0) continue;
2311 track[index] = tracks[i];
2313 for (Int_t j=i+1;j<trackindex;j++){
2314 if (tracks[j]<0) continue;
2315 if (tracks[j]==tracks[i]){
2323 for (Int_t i=0;i<index;i++){
2324 if (cluster[index]>max) {
2325 sharedtrack=track[index];
2332 if (sharedtrack>=100000) return -1;
2334 // make list of overlaps
2336 for (Int_t icluster=0;icluster<6;icluster++){
2337 if (clusterlist[icluster]<0) continue;
2338 Int_t index = clusterlist[icluster];
2339 Int_t l=(index & 0xf0000000) >> 28;
2340 Int_t c=(index & 0x0fffffff) >> 00;
2341 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2342 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2344 if (cl->GetNy()>2) continue;
2345 if (cl->GetNz()>2) continue;
2348 if (cl->GetNy()>3) continue;
2349 if (cl->GetNz()>3) continue;
2352 for (Int_t itrack=3;itrack>=0;itrack--){
2353 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2354 if (fgLayers[l].GetClusterTracks(itrack,c)==sharedtrack){
2364 AliITStrackMI * AliITStrackerMI::GetBest2Tracks(Int_t trackID1, Int_t trackID2, Float_t th0, Float_t th1){
2366 // try to find track hypothesys without conflicts
2367 // with minimal chi2;
2368 TClonesArray *arr1 = (TClonesArray*)fTrackHypothesys.At(trackID1);
2369 Int_t entries1 = arr1->GetEntriesFast();
2370 TClonesArray *arr2 = (TClonesArray*)fTrackHypothesys.At(trackID2);
2371 if (!arr2) return (AliITStrackMI*) arr1->UncheckedAt(0);
2372 Int_t entries2 = arr2->GetEntriesFast();
2373 if (entries2<=0) return (AliITStrackMI*) arr1->UncheckedAt(0);
2375 AliITStrackMI * track10=(AliITStrackMI*) arr1->UncheckedAt(0);
2376 AliITStrackMI * track20=(AliITStrackMI*) arr2->UncheckedAt(0);
2377 if (TMath::Abs(1./track10->Get1Pt())>0.5+TMath::Abs(1/track20->Get1Pt())) return track10;
2379 for (Int_t itrack=0;itrack<entries1;itrack++){
2380 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
2381 UnRegisterClusterTracks(track,trackID1);
2384 for (Int_t itrack=0;itrack<entries2;itrack++){
2385 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
2386 UnRegisterClusterTracks(track,trackID2);
2390 Float_t maxconflicts=6;
2391 Double_t maxchi2 =1000.;
2393 // get weight of hypothesys - using best hypothesy
2396 Int_t list1[6],list2[6];
2397 AliITSRecPoint *clist1[6], *clist2[6] ;
2398 RegisterClusterTracks(track10,trackID1);
2399 RegisterClusterTracks(track20,trackID2);
2400 Float_t conflict1 = GetNumberOfSharedClusters(track10,trackID1,list1,clist1);
2401 Float_t conflict2 = GetNumberOfSharedClusters(track20,trackID2,list2,clist2);
2402 UnRegisterClusterTracks(track10,trackID1);
2403 UnRegisterClusterTracks(track20,trackID2);
2406 Float_t chi21 =0,chi22=0,ncl1=0,ncl2=0;
2407 Float_t nerry[6],nerrz[6];
2408 Float_t *erry1=GetErrY(trackID1),*errz1 = GetErrZ(trackID1);
2409 Float_t *erry2=GetErrY(trackID2),*errz2 = GetErrZ(trackID2);
2410 for (Int_t i=0;i<6;i++){
2411 if ( (erry1[i]>0) && (erry2[i]>0)) {
2412 nerry[i] = TMath::Min(erry1[i],erry2[i]);
2413 nerrz[i] = TMath::Min(errz1[i],errz2[i]);
2415 nerry[i] = TMath::Max(erry1[i],erry2[i]);
2416 nerrz[i] = TMath::Max(errz1[i],errz2[i]);
2418 if (TMath::Abs(track10->GetDy(i))>0.000000000000001){
2419 chi21 += track10->GetDy(i)*track10->GetDy(i)/(nerry[i]*nerry[i]);
2420 chi21 += track10->GetDz(i)*track10->GetDz(i)/(nerrz[i]*nerrz[i]);
2423 if (TMath::Abs(track20->GetDy(i))>0.000000000000001){
2424 chi22 += track20->GetDy(i)*track20->GetDy(i)/(nerry[i]*nerry[i]);
2425 chi22 += track20->GetDz(i)*track20->GetDz(i)/(nerrz[i]*nerrz[i]);
2433 Float_t d1 = TMath::Sqrt(track10->GetD(0)*track10->GetD(0)+track10->GetD(1)*track10->GetD(1))+0.1;
2434 Float_t d2 = TMath::Sqrt(track20->GetD(0)*track20->GetD(0)+track20->GetD(1)*track20->GetD(1))+0.1;
2435 Float_t s1 = TMath::Sqrt(track10->GetSigmaY2()*track10->GetSigmaZ2());
2436 Float_t s2 = TMath::Sqrt(track20->GetSigmaY2()*track20->GetSigmaZ2());
2438 w1 = (d2/(d1+d2)+ 2*s2/(s1+s2)+
2439 +s2/(s1+s2)*0.5*(chi22+2.)/(chi21+chi22+4.)
2440 +1.*TMath::Abs(1./track10->Get1Pt())/(TMath::Abs(1./track10->Get1Pt())+TMath::Abs(1./track20->Get1Pt()))
2442 w2 = (d1/(d1+d2)+ 2*s1/(s1+s2)+
2443 s1/(s1+s2)*0.5*(chi21+2.)/(chi21+chi22+4.)
2444 +1.*TMath::Abs(1./track20->Get1Pt())/(TMath::Abs(1./track10->Get1Pt())+TMath::Abs(1./track20->Get1Pt()))
2447 Double_t sumw = w1+w2;
2451 w1 = (d2+0.5)/(d1+d2+1.);
2452 w2 = (d1+0.5)/(d1+d2+1.);
2454 // Float_t maxmax = w1*track10->fChi2MIP[0]+w2*track20->fChi2MIP[0]+w1*conflict1+w2*conflict2+1.;
2455 //Float_t maxconflicts0 = w1*conflict1+w2*conflict2;
2457 // get pair of "best" hypothesys
2459 Float_t * ny1 = GetNy(trackID1), * nz1 = GetNz(trackID1);
2460 Float_t * ny2 = GetNy(trackID2), * nz2 = GetNz(trackID2);
2462 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
2463 AliITStrackMI * track1=(AliITStrackMI*) arr1->UncheckedAt(itrack1);
2464 //if (track1->fFakeRatio>0) continue;
2465 RegisterClusterTracks(track1,trackID1);
2466 for (Int_t itrack2=0;itrack2<entries2;itrack2++){
2467 AliITStrackMI * track2=(AliITStrackMI*) arr2->UncheckedAt(itrack2);
2469 // Float_t current = w1*track1->fChi2MIP[0]+w2*track2->fChi2MIP[0];
2470 //if (track2->fFakeRatio>0) continue;
2472 RegisterClusterTracks(track2,trackID2);
2473 Int_t list1[6],list2[6];
2474 AliITSRecPoint *clist1[6], *clist2[6] ;
2475 Float_t cconflict1 = GetNumberOfSharedClusters(track1,trackID1,list1,clist1);
2476 Float_t cconflict2 = GetNumberOfSharedClusters(track2,trackID2,list2,clist2);
2477 UnRegisterClusterTracks(track2,trackID2);
2479 if (track1->GetConstrain()) nskipped+=w1*track1->GetNSkipped();
2480 if (track2->GetConstrain()) nskipped+=w2*track2->GetNSkipped();
2481 if (nskipped>0.5) continue;
2483 //if ( w1*conflict1+w2*conflict2>maxconflicts0) continue;
2484 if (conflict1+1<cconflict1) continue;
2485 if (conflict2+1<cconflict2) continue;
2489 for (Int_t i=0;i<6;i++){
2491 Float_t c1 =0.; // conflict coeficients
2493 if (clist1[i]&&clist2[i]){
2496 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-TMath::Max(ny1[i],ny2[i])-TMath::Max(nz1[i],nz2[i]));
2499 deltan = (clist1[i]->GetNz()-TMath::Max(nz1[i],nz2[i]));
2501 c1 = 2./TMath::Max(3.+deltan,2.);
2502 c2 = 2./TMath::Max(3.+deltan,2.);
2508 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-ny1[i]-nz1[i]);
2511 deltan = (clist1[i]->GetNz()-nz1[i]);
2513 c1 = 2./TMath::Max(3.+deltan,2.);
2520 deltan = (clist2[i]->GetNy()+clist2[i]->GetNz()-ny2[i]-nz2[i]);
2523 deltan = (clist2[i]->GetNz()-nz2[i]);
2525 c2 = 2./TMath::Max(3.+deltan,2.);
2530 Double_t chi21=0,chi22=0;
2531 if (TMath::Abs(track1->GetDy(i))>0.) {
2532 chi21 = (track1->GetDy(i)/track1->GetSigmaY(i))*(track1->GetDy(i)/track1->GetSigmaY(i))+
2533 (track1->GetDz(i)/track1->GetSigmaZ(i))*(track1->GetDz(i)/track1->GetSigmaZ(i));
2534 //chi21 = (track1->fDy[i]*track1->fDy[i])/(nerry[i]*nerry[i])+
2535 // (track1->GetDz(i)*track1->GetDz(i))/(nerrz[i]*nerrz[i]);
2537 if (TMath::Abs(track1->GetSigmaY(i)>0.)) c1=1;
2540 if (TMath::Abs(track2->GetDy(i))>0.) {
2541 chi22 = (track2->GetDy(i)/track2->GetSigmaY(i))*(track2->GetDy(i)/track2->GetSigmaY(i))+
2542 (track2->GetDz(i)/track2->GetSigmaZ(i))*(track2->GetDz(i)/track2->GetSigmaZ(i));
2543 //chi22 = (track2->fDy[i]*track2->fDy[i])/(nerry[i]*nerry[i])+
2544 // (track2->fDz[i]*track2->fDz[i])/(nerrz[i]*nerrz[i]);
2547 if (TMath::Abs(track2->GetSigmaY(i)>0.)) c2=1;
2549 sumchi2+=w1*(1.+c1)*(1+c1)*(chi21+c1)+w2*(1.+c2)*(1+c2)*(chi22+c2);
2550 if (chi21>0) sum+=w1;
2551 if (chi22>0) sum+=w2;
2554 Double_t norm = sum-w1*track1->GetNSkipped()-w2*track2->GetNSkipped();
2555 if (norm<0) norm =1/(w1*track1->GetNSkipped()+w2*track2->GetNSkipped());
2556 Double_t normchi2 = 2*conflict+sumchi2/sum;
2557 if ( normchi2 <maxchi2 ){
2560 maxconflicts = conflict;
2564 UnRegisterClusterTracks(track1,trackID1);
2567 // if (maxconflicts<4 && maxchi2<th0){
2568 if (maxchi2<th0*2.){
2569 Float_t orig = track10->GetFakeRatio()*track10->GetNumberOfClusters();
2570 AliITStrackMI* track1=(AliITStrackMI*) arr1->UncheckedAt(index1);
2571 track1->SetChi2MIP(5,maxconflicts);
2572 track1->SetChi2MIP(6,maxchi2);
2573 track1->SetChi2MIP(7,0.01+orig-(track1->GetFakeRatio()*track1->GetNumberOfClusters()));
2574 // track1->UpdateESDtrack(AliESDtrack::kITSin);
2575 track1->SetChi2MIP(8,index1);
2576 fBestTrackIndex[trackID1] =index1;
2577 UpdateESDtrack(track1, AliESDtrack::kITSin);
2579 else if (track10->GetChi2MIP(0)<th1){
2580 track10->SetChi2MIP(5,maxconflicts);
2581 track10->SetChi2MIP(6,maxchi2);
2582 // track10->UpdateESDtrack(AliESDtrack::kITSin);
2583 UpdateESDtrack(track10,AliESDtrack::kITSin);
2586 for (Int_t itrack=0;itrack<entries1;itrack++){
2587 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
2588 UnRegisterClusterTracks(track,trackID1);
2591 for (Int_t itrack=0;itrack<entries2;itrack++){
2592 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
2593 UnRegisterClusterTracks(track,trackID2);
2596 if (track10->GetConstrain()&&track10->GetChi2MIP(0)<kMaxChi2PerCluster[0]&&track10->GetChi2MIP(1)<kMaxChi2PerCluster[1]
2597 &&track10->GetChi2MIP(2)<kMaxChi2PerCluster[2]&&track10->GetChi2MIP(3)<kMaxChi2PerCluster[3]){
2598 // if (track10->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track10->fChi2MIP[1]<kMaxChi2PerCluster[1]
2599 // &&track10->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track10->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2600 RegisterClusterTracks(track10,trackID1);
2602 if (track20->GetConstrain()&&track20->GetChi2MIP(0)<kMaxChi2PerCluster[0]&&track20->GetChi2MIP(1)<kMaxChi2PerCluster[1]
2603 &&track20->GetChi2MIP(2)<kMaxChi2PerCluster[2]&&track20->GetChi2MIP(3)<kMaxChi2PerCluster[3]){
2604 //if (track20->fChi2MIP[0]<kMaxChi2PerCluster[0]&&track20->fChi2MIP[1]<kMaxChi2PerCluster[1]
2605 // &&track20->fChi2MIP[2]<kMaxChi2PerCluster[2]&&track20->fChi2MIP[3]<kMaxChi2PerCluster[3]){
2606 RegisterClusterTracks(track20,trackID2);
2612 void AliITStrackerMI::UseClusters(const AliKalmanTrack *t, Int_t from) const {
2613 //--------------------------------------------------------------------
2614 // This function marks clusters assigned to the track
2615 //--------------------------------------------------------------------
2616 AliTracker::UseClusters(t,from);
2618 AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(0));
2619 //if (c->GetQ()>2) c->Use();
2620 if (c->GetSigmaZ2()>0.1) c->Use();
2621 c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(1));
2622 //if (c->GetQ()>2) c->Use();
2623 if (c->GetSigmaZ2()>0.1) c->Use();
2628 void AliITStrackerMI::AddTrackHypothesys(AliITStrackMI * track, Int_t esdindex)
2630 //------------------------------------------------------------------
2631 // add track to the list of hypothesys
2632 //------------------------------------------------------------------
2634 if (esdindex>=fTrackHypothesys.GetEntriesFast()) fTrackHypothesys.Expand(esdindex*2+10);
2636 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2638 array = new TObjArray(10);
2639 fTrackHypothesys.AddAt(array,esdindex);
2641 array->AddLast(track);
2644 void AliITStrackerMI::SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode)
2646 //-------------------------------------------------------------------
2647 // compress array of track hypothesys
2648 // keep only maxsize best hypothesys
2649 //-------------------------------------------------------------------
2650 if (esdindex>fTrackHypothesys.GetEntriesFast()) return;
2651 if (! (fTrackHypothesys.At(esdindex)) ) return;
2652 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2653 Int_t entries = array->GetEntriesFast();
2655 //- find preliminary besttrack as a reference
2656 Float_t minchi2=10000;
2658 AliITStrackMI * besttrack=0;
2659 for (Int_t itrack=0;itrack<array->GetEntriesFast();itrack++){
2660 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2661 if (!track) continue;
2662 Float_t chi2 = NormalizedChi2(track,0);
2664 Int_t tpcLabel=track->GetESDtrack()->GetTPCLabel();
2665 track->SetLabel(tpcLabel);
2667 track->SetFakeRatio(1.);
2668 CookLabel(track,0.); //For comparison only
2670 //if (chi2<kMaxChi2PerCluster[0]&&track->fFakeRatio==0){
2671 if (chi2<kMaxChi2PerCluster[0]){
2672 if (track->GetNumberOfClusters()<maxn) continue;
2673 maxn = track->GetNumberOfClusters();
2680 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
2681 delete array->RemoveAt(itrack);
2685 if (!besttrack) return;
2688 //take errors of best track as a reference
2689 Float_t *erry = GetErrY(esdindex), *errz = GetErrZ(esdindex);
2690 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
2691 for (Int_t i=0;i<6;i++) {
2692 if (besttrack->GetClIndex(i)>0){
2693 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2694 errz[i] = besttrack->GetSigmaZ(i); errz[i+6] = besttrack->GetSigmaZ(i+6);
2695 ny[i] = besttrack->GetNy(i);
2696 nz[i] = besttrack->GetNz(i);
2700 // calculate normalized chi2
2702 Float_t * chi2 = new Float_t[entries];
2703 Int_t * index = new Int_t[entries];
2704 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2705 for (Int_t itrack=0;itrack<entries;itrack++){
2706 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2708 track->SetChi2MIP(0,GetNormalizedChi2(track, mode));
2709 if (track->GetChi2MIP(0)<kMaxChi2PerCluster[0])
2710 chi2[itrack] = track->GetChi2MIP(0);
2712 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
2713 delete array->RemoveAt(itrack);
2719 TMath::Sort(entries,chi2,index,kFALSE);
2720 besttrack = (AliITStrackMI*)array->At(index[0]);
2721 if (besttrack&&besttrack->GetChi2MIP(0)<kMaxChi2PerCluster[0]){
2722 for (Int_t i=0;i<6;i++){
2723 if (besttrack->GetClIndex(i)>0){
2724 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2725 errz[i] = besttrack->GetSigmaZ(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2726 ny[i] = besttrack->GetNy(i);
2727 nz[i] = besttrack->GetNz(i);
2732 // calculate one more time with updated normalized errors
2733 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2734 for (Int_t itrack=0;itrack<entries;itrack++){
2735 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2737 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
2738 if (track->GetChi2MIP(0)<kMaxChi2PerCluster[0])
2739 chi2[itrack] = track->GetChi2MIP(0)-0*(track->GetNumberOfClusters()+track->GetNDeadZone());
2742 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
2743 delete array->RemoveAt(itrack);
2748 entries = array->GetEntriesFast();
2752 TObjArray * newarray = new TObjArray();
2753 TMath::Sort(entries,chi2,index,kFALSE);
2754 besttrack = (AliITStrackMI*)array->At(index[0]);
2757 for (Int_t i=0;i<6;i++){
2758 if (besttrack->GetNz(i)>0&&besttrack->GetNy(i)>0){
2759 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2760 errz[i] = besttrack->GetSigmaZ(i); errz[i+6] = besttrack->GetSigmaZ(i+6);
2761 ny[i] = besttrack->GetNy(i);
2762 nz[i] = besttrack->GetNz(i);
2765 besttrack->SetChi2MIP(0,GetNormalizedChi2(besttrack,mode));
2766 Float_t minchi2 = TMath::Min(besttrack->GetChi2MIP(0)+5.+besttrack->GetNUsed(), double(kMaxChi2PerCluster[0]));
2767 Float_t minn = besttrack->GetNumberOfClusters()-3;
2769 for (Int_t i=0;i<entries;i++){
2770 AliITStrackMI * track = (AliITStrackMI*)array->At(index[i]);
2771 if (!track) continue;
2772 if (accepted>maxcut) break;
2773 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
2774 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
2775 if (track->GetNumberOfClusters()<6 && (track->GetChi2MIP(0)+track->GetNUsed()>minchi2)){
2776 delete array->RemoveAt(index[i]);
2780 Bool_t shortbest = !track->GetConstrain() && track->GetNumberOfClusters()<6;
2781 if ((track->GetChi2MIP(0)+track->GetNUsed()<minchi2 && track->GetNumberOfClusters()>=minn) ||shortbest){
2782 if (!shortbest) accepted++;
2784 newarray->AddLast(array->RemoveAt(index[i]));
2785 for (Int_t i=0;i<6;i++){
2787 erry[i] = track->GetSigmaY(i); erry[i+6] = track->GetSigmaY(i+6);
2788 errz[i] = track->GetSigmaZ(i); errz[i] = track->GetSigmaZ(i+6);
2789 ny[i] = track->GetNy(i);
2790 nz[i] = track->GetNz(i);
2795 delete array->RemoveAt(index[i]);
2799 delete fTrackHypothesys.RemoveAt(esdindex);
2800 fTrackHypothesys.AddAt(newarray,esdindex);
2804 delete fTrackHypothesys.RemoveAt(esdindex);
2813 AliITStrackMI * AliITStrackerMI::GetBestHypothesys(Int_t esdindex, AliITStrackMI * original, Int_t checkmax)
2815 //-------------------------------------------------------------
2816 // try to find best hypothesy
2817 // currently - minimal chi2 of track+backpropagated track+matching to the tpc track
2818 //-------------------------------------------------------------
2819 if (fTrackHypothesys.GetEntriesFast()<=esdindex) return 0;
2820 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2821 if (!array) return 0;
2822 Int_t entries = array->GetEntriesFast();
2823 if (!entries) return 0;
2824 Float_t minchi2 = 100000;
2825 AliITStrackMI * besttrack=0;
2827 AliITStrackMI * backtrack = new AliITStrackMI(*original);
2828 AliITStrackMI * forwardtrack = new AliITStrackMI(*original);
2829 Double_t xyzv[]={GetX(),GetY(),GetZ()};
2830 Double_t ersv[]={GetSigmaX()/3.,GetSigmaY()/3.,GetSigmaZ()/3.};
2832 for (Int_t i=0;i<entries;i++){
2833 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
2834 if (!track) continue;
2835 Float_t sigmarfi,sigmaz;
2836 GetDCASigma(track,sigmarfi,sigmaz);
2837 track->SetDnorm(0,sigmarfi);
2838 track->SetDnorm(1,sigmaz);
2840 track->SetChi2MIP(1,1000000);
2841 track->SetChi2MIP(2,1000000);
2842 track->SetChi2MIP(3,1000000);
2845 backtrack = new(backtrack) AliITStrackMI(*track);
2846 if (track->GetConstrain()){
2847 if (!backtrack->PropagateTo(3.,0.0028,65.19)) continue;
2848 if (!backtrack->Improve(0,xyzv,ersv)) continue;
2849 //if (!backtrack->PropagateTo(2.,0.0028,0)) continue; // This
2850 //if (!backtrack->Improve(0,xyzv,ersv)) continue; // is
2851 //if (!backtrack->PropagateTo(1.,0.0028,0)) continue; // an over-kill
2852 //if (!backtrack->Improve(0,xyzv,ersv)) continue; // (I.B.)
2853 //if (!backtrack->PropagateToVertex()) continue; //
2854 backtrack->ResetCovariance(10.);
2855 //if (!backtrack->Improve(0,xyzv,ersv)) continue;
2857 backtrack->ResetCovariance(10.);
2859 backtrack->ResetClusters();
2861 Double_t x = original->GetX();
2862 if (!RefitAt(x,backtrack,track)) continue;
2864 track->SetChi2MIP(1,NormalizedChi2(backtrack,0));
2865 //for (Int_t i=2;i<6;i++){track->fDy[i]+=backtrack->fDy[i]; track->fDz[i]+=backtrack->fDz[i];}
2866 if (track->GetChi2MIP(1)>kMaxChi2PerCluster[1]*6.) continue;
2867 track->SetChi22(GetMatchingChi2(backtrack,original));
2869 if ((track->GetConstrain()) && track->GetChi22()>90.) continue;
2870 if ((!track->GetConstrain()) && track->GetChi22()>30.) continue;
2871 if ( track->GetChi22()/track->GetNumberOfClusters()>11.) continue;
2874 if (!(track->GetConstrain())&&track->GetChi2MIP(1)>kMaxChi2PerCluster[1]) continue;
2878 //forward track - without constraint
2879 forwardtrack = new(forwardtrack) AliITStrackMI(*original);
2880 forwardtrack->ResetClusters();
2882 RefitAt(x,forwardtrack,track);
2883 track->SetChi2MIP(2,NormalizedChi2(forwardtrack,0));
2884 if (track->GetChi2MIP(2)>kMaxChi2PerCluster[2]*6.0) continue;
2885 if (!(track->GetConstrain())&&track->GetChi2MIP(2)>kMaxChi2PerCluster[2]) continue;
2887 //track->fD[0] = forwardtrack->GetD(GetX(),GetY());
2888 //track->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
2889 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),track->GetDP()); //I.B.
2890 forwardtrack->SetD(0,track->GetD(0));
2891 forwardtrack->SetD(1,track->GetD(1));
2894 AliITSRecPoint* clist[6];
2895 track->SetChi2MIP(4,GetNumberOfSharedClusters(track,esdindex,list,clist));
2896 if ( (!track->GetConstrain()) && track->GetChi2MIP(4)>1.0) continue;
2899 track->SetChi2MIP(3,GetInterpolatedChi2(forwardtrack,backtrack));
2900 if ( (track->GetChi2MIP(3)>6.*kMaxChi2PerCluster[3])) continue;
2901 if ( (!track->GetConstrain()) && (track->GetChi2MIP(3)>2*kMaxChi2PerCluster[3])) {
2902 track->SetChi2MIP(3,1000);
2905 Double_t chi2 = track->GetChi2MIP(0)+track->GetNUsed();
2907 for (Int_t ichi=0;ichi<5;ichi++){
2908 forwardtrack->SetChi2MIP(ichi, track->GetChi2MIP(ichi));
2910 if (chi2 < minchi2){
2911 //besttrack = new AliITStrackMI(*forwardtrack);
2913 besttrack->SetLabel(track->GetLabel());
2914 besttrack->SetFakeRatio(track->GetFakeRatio());
2916 //original->fD[0] = forwardtrack->GetD(GetX(),GetY());
2917 //original->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
2918 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),original->GetDP()); //I.B.
2922 delete forwardtrack;
2924 for (Int_t i=0;i<entries;i++){
2925 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
2926 if (!track) continue;
2928 if (accepted>checkmax || track->GetChi2MIP(3)>kMaxChi2PerCluster[3]*6. ||
2929 (track->GetNumberOfClusters()<besttrack->GetNumberOfClusters()-1.)||
2930 track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*besttrack->GetNUsed()+3.){
2931 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
2932 delete array->RemoveAt(i);
2942 SortTrackHypothesys(esdindex,checkmax,1);
2943 array = (TObjArray*) fTrackHypothesys.At(esdindex);
2944 if (!array) return 0; // PH What can be the reason? Check SortTrackHypothesys
2945 besttrack = (AliITStrackMI*)array->At(0);
2946 if (!besttrack) return 0;
2947 besttrack->SetChi2MIP(8,0);
2948 fBestTrackIndex[esdindex]=0;
2949 entries = array->GetEntriesFast();
2950 AliITStrackMI *longtrack =0;
2952 Float_t minn=besttrack->GetNumberOfClusters()+besttrack->GetNDeadZone();
2953 for (Int_t itrack=entries-1;itrack>0;itrack--){
2954 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2955 if (!track->GetConstrain()) continue;
2956 if (track->GetNumberOfClusters()+track->GetNDeadZone()<minn) continue;
2957 if (track->GetChi2MIP(0)-besttrack->GetChi2MIP(0)>0.0) continue;
2958 if (track->GetChi2MIP(0)>4.) continue;
2959 minn = track->GetNumberOfClusters()+track->GetNDeadZone();
2962 //if (longtrack) besttrack=longtrack;
2965 AliITSRecPoint * clist[6];
2966 Float_t shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
2967 if (besttrack->GetConstrain()&&besttrack->GetChi2MIP(0)<kMaxChi2PerCluster[0]&&besttrack->GetChi2MIP(1)<kMaxChi2PerCluster[1]
2968 &&besttrack->GetChi2MIP(2)<kMaxChi2PerCluster[2]&&besttrack->GetChi2MIP(3)<kMaxChi2PerCluster[3]){
2969 RegisterClusterTracks(besttrack,esdindex);
2976 Int_t sharedtrack = GetOverlapTrack(besttrack, esdindex, nshared, list, overlist);
2977 if (sharedtrack>=0){
2979 besttrack = GetBest2Tracks(esdindex,sharedtrack,10,5.5);
2981 shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
2987 if (shared>2.5) return 0;
2988 if (shared>1.0) return besttrack;
2990 // Don't sign clusters if not gold track
2992 if (!besttrack->IsGoldPrimary()) return besttrack;
2993 if (besttrack->GetESDtrack()->GetKinkIndex(0)!=0) return besttrack; //track belong to kink
2995 if (fConstraint[fPass]){
2999 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
3000 for (Int_t i=0;i<6;i++){
3001 Int_t index = besttrack->GetClIndex(i);
3002 if (index<=0) continue;
3003 Int_t ilayer = (index & 0xf0000000) >> 28;
3004 if (besttrack->GetSigmaY(ilayer)<0.00000000001) continue;
3005 AliITSRecPoint *c = (AliITSRecPoint*)GetCluster(index);
3007 if (ilayer>3&&c->GetNy()+c->GetNz()>6) continue;
3008 if ( (c->GetNy()+c->GetNz() )> ny[i]+nz[i]+0.7) continue; //shared track
3009 if ( c->GetNz()> nz[i]+0.7) continue; //shared track
3010 if ( ilayer>2&& besttrack->GetNormQ(ilayer)/besttrack->GetExpQ()>1.5) continue;
3011 //if ( c->GetNy()> ny[i]+0.7) continue; //shared track
3013 Bool_t cansign = kTRUE;
3014 for (Int_t itrack=0;itrack<entries; itrack++){
3015 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
3016 if (!track) continue;
3017 if (track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*shared+1.) break;
3018 if ( (track->GetClIndex(ilayer)>0) && (track->GetClIndex(ilayer)!=besttrack->GetClIndex(ilayer))){
3024 if (TMath::Abs(besttrack->GetDy(ilayer)/besttrack->GetSigmaY(ilayer))>3.) continue;
3025 if (TMath::Abs(besttrack->GetDz(ilayer)/besttrack->GetSigmaZ(ilayer))>3.) continue;
3026 if (!c->IsUsed()) c->Use();
3035 void AliITStrackerMI::GetBestHypothesysMIP(TObjArray &itsTracks)
3038 // get "best" hypothesys
3041 Int_t nentries = itsTracks.GetEntriesFast();
3042 for (Int_t i=0;i<nentries;i++){
3043 AliITStrackMI* track = (AliITStrackMI*)itsTracks.At(i);
3044 if (!track) continue;
3045 TObjArray * array = (TObjArray*) fTrackHypothesys.At(i);
3046 if (!array) continue;
3047 if (array->GetEntriesFast()<=0) continue;
3049 AliITStrackMI* longtrack=0;
3051 Float_t maxchi2=1000;
3052 for (Int_t j=0;j<array->GetEntriesFast();j++){
3053 AliITStrackMI* track = (AliITStrackMI*)array->At(j);
3054 if (!track) continue;
3055 if (track->GetGoldV0()) {
3056 longtrack = track; //gold V0 track taken
3059 if (track->GetNumberOfClusters()+track->GetNDeadZone()<minn) continue;
3060 Float_t chi2 = track->GetChi2MIP(0);
3062 if (!track->GetGoldV0()&&track->GetConstrain()==kFALSE) chi2+=5;
3064 if (track->GetNumberOfClusters()+track->GetNDeadZone()>minn) maxchi2 = track->GetChi2MIP(0);
3066 if (chi2 > maxchi2) continue;
3067 minn= track->GetNumberOfClusters()+track->GetNDeadZone();
3074 AliITStrackMI * besttrack = (AliITStrackMI*)array->At(0);
3075 if (!longtrack) {longtrack = besttrack;}
3076 else besttrack= longtrack;
3080 AliITSRecPoint * clist[6];
3081 Float_t shared = GetNumberOfSharedClusters(longtrack,i,list,clist);
3083 track->SetNUsed(shared);
3084 track->SetNSkipped(besttrack->GetNSkipped());
3085 track->SetChi2MIP(0,besttrack->GetChi2MIP(0));
3090 Int_t sharedtrack = GetOverlapTrack(longtrack, i, nshared, list, overlist);
3091 //if (sharedtrack==-1) sharedtrack=0;
3092 if (sharedtrack>=0){
3093 besttrack = GetBest2Tracks(i,sharedtrack,10,5.5);
3096 if (besttrack&&fAfterV0){
3097 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3099 if (besttrack&&fConstraint[fPass])
3100 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3101 //if (besttrack&&besttrack->fConstrain)
3102 // UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3103 if (besttrack->GetChi2MIP(0)+besttrack->GetNUsed()>1.5){
3104 if ( (TMath::Abs(besttrack->GetD(0))>0.1) && fConstraint[fPass]) {
3105 track->SetReconstructed(kFALSE);
3107 if ( (TMath::Abs(besttrack->GetD(1))>0.1) && fConstraint[fPass]){
3108 track->SetReconstructed(kFALSE);
3117 void AliITStrackerMI::CookLabel(AliITStrackMI *track,Float_t wrong) const {
3118 //--------------------------------------------------------------------
3119 //This function "cooks" a track label. If label<0, this track is fake.
3120 //--------------------------------------------------------------------
3123 if ( track->GetESDtrack()) tpcLabel = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
3125 track->SetChi2MIP(9,0);
3127 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3128 Int_t cindex = track->GetClusterIndex(i);
3129 Int_t l=(cindex & 0xf0000000) >> 28;
3130 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
3132 for (Int_t ind=0;ind<3;ind++){
3134 if (cl->GetLabel(ind)==tpcLabel) isWrong=0;
3136 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
3139 track->SetFakeRatio(double(nwrong)/double(track->GetNumberOfClusters()));
3141 if (track->GetFakeRatio()>wrong) track->SetLabel(-tpcLabel);
3143 track->SetLabel(tpcLabel);
3150 void AliITStrackerMI::CookdEdx(AliITStrackMI* track)
3155 //AliITSRecPoint * clist[6];
3156 // Int_t shared = GetNumberOfSharedClusters(track,index,list,clist);
3159 track->SetChi2MIP(9,0);
3160 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3161 Int_t cindex = track->GetClusterIndex(i);
3162 Int_t l=(cindex & 0xf0000000) >> 28;
3163 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
3164 Int_t lab = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
3166 for (Int_t ind=0;ind<3;ind++){
3167 if (cl->GetLabel(ind)==lab) isWrong=0;
3169 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
3171 //if (l>3 && (cl->GetNy()>4) || (cl->GetNz()>4)) continue; //shared track
3172 //if (l>3&& !(cl->GetType()==1||cl->GetType()==10)) continue;
3173 //if (l<4&& !(cl->GetType()==1)) continue;
3174 dedx[accepted]= track->GetSampledEdx(i);
3175 //dedx[accepted]= track->fNormQ[l];
3183 TMath::Sort(accepted,dedx,indexes,kFALSE);
3186 Double_t nl=low*accepted, nu =up*accepted;
3188 Float_t sumweight =0;
3189 for (Int_t i=0; i<accepted; i++) {
3191 if (i<nl+0.1) weight = TMath::Max(1.-(nl-i),0.);
3192 if (i>nu-1) weight = TMath::Max(nu-i,0.);
3193 sumamp+= dedx[indexes[i]]*weight;
3196 track->SetdEdx(sumamp/sumweight);
3200 void AliITStrackerMI::MakeCoeficients(Int_t ntracks){
3203 if (fCoeficients) delete []fCoeficients;
3204 fCoeficients = new Float_t[ntracks*48];
3205 for (Int_t i=0;i<ntracks*48;i++) fCoeficients[i]=-1.;
3209 Double_t AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer)
3215 Float_t theta = track->GetTgl();
3216 Float_t phi = track->GetSnp();
3217 phi = TMath::Sqrt(phi*phi/(1.-phi*phi));
3218 GetError(layer,cluster,theta,phi,track->GetExpQ(),erry,errz);
3219 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz);
3221 GetNTeor(layer,cluster, theta,phi,ny,nz);
3222 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
3224 chi2+=0.5*TMath::Min(delta/2,2.);
3225 chi2+=2.*cluster->GetDeltaProbability();
3228 track->SetNy(layer,ny);
3229 track->SetNz(layer,nz);
3230 track->SetSigmaY(layer,erry);
3231 track->SetSigmaZ(layer, errz);
3232 //track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt(1+theta*theta+phi*phi);
3233 track->SetNormQ(layer,cluster->GetQ()/TMath::Sqrt((1.+ track->GetTgl()*track->GetTgl())/(1.- track->GetSnp()*track->GetSnp())));
3238 Int_t AliITStrackerMI::UpdateMI(AliITStrackMI* track, const AliITSRecPoint* cl,Double_t chi2,Int_t index) const
3243 Int_t layer = (index & 0xf0000000) >> 28;
3244 track->SetClIndex(layer, index);
3245 if ( (layer>1) &&track->GetNormQ(layer)/track->GetExpQ()<0.5 ) {
3246 chi2+= (0.5-track->GetNormQ(layer)/track->GetExpQ())*10.;
3247 track->SetdEdxMismatch(track->GetdEdxMismatch()+(0.5-track->GetNormQ(layer)/track->GetExpQ())*10.);
3250 if (cl->GetQ()<=0) return 0; // ingore the "virtual" clusters
3252 // Take into account the mis-alignment
3253 Double_t x=track->GetX()+cl->GetX();
3254 if (!track->PropagateTo(x,0.,0.)) return 0;
3256 return track->UpdateMI(cl->GetY(),cl->GetZ(),track->GetSigmaY(layer),track->GetSigmaZ(layer),chi2,index);
3259 void AliITStrackerMI::GetNTeor(Int_t layer, const AliITSRecPoint* /*cl*/, Float_t theta, Float_t phi, Float_t &ny, Float_t &nz)
3265 ny = 1.+TMath::Abs(phi)*3.2;
3266 nz = 1.+TMath::Abs(theta)*0.34;
3270 ny = 1.+TMath::Abs(phi)*3.2;
3271 nz = 1.+TMath::Abs(theta)*0.28;
3276 ny = 2.02+TMath::Abs(phi)*1.95;
3277 nz = 2.02+TMath::Abs(phi)*2.35;
3280 ny = 6.6-2.7*TMath::Abs(phi);
3281 nz = 2.8-3.11*TMath::Abs(phi)+0.45*TMath::Abs(theta);
3286 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)
3288 //calculate cluster position error
3291 GetNTeor(layer, cl,theta,phi,ny,nz);
3292 erry = TMath::Sqrt(cl->GetSigmaY2());
3293 errz = TMath::Sqrt(cl->GetSigmaZ2());
3298 if (TMath::Abs(ny-cl->GetNy())>0.6) {
3299 if (ny<cl->GetNy()){
3300 erry*=0.4+TMath::Abs(ny-cl->GetNy());
3301 errz*=0.4+TMath::Abs(ny-cl->GetNy());
3303 erry*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
3304 errz*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
3307 if (TMath::Abs(nz-cl->GetNz())>1.) {
3308 erry*=TMath::Abs(nz-cl->GetNz());
3309 errz*=TMath::Abs(nz-cl->GetNz());
3313 erry= TMath::Min(erry,float(0.005));
3314 errz= TMath::Min(errz,float(0.03));
3320 //factor 1.8 appears in new simulation
3323 if (cl->GetNy()==100||cl->GetNz()==100){
3328 if (cl->GetNy()+cl->GetNz()>12){
3333 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
3334 Float_t chargematch = TMath::Max(double(normq/expQ),2.);
3336 if (cl->GetType()==1 || cl->GetType()==10 ){
3337 if (chargematch<1.0 || (cl->GetNy()+cl->GetNz()<nz+ny+0.5)){
3339 erry = 0.00094*scale;
3342 if (cl->GetNy()+cl->GetNz()<nz+ny+1.2){
3347 erry = 0.0027*scale;
3348 errz = TMath::Min(0.028*(chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.15)*scale;
3351 if (cl->GetType()==2 || cl->GetType()==11 ){
3352 erry = TMath::Min(0.0010*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.05)*scale;
3353 errz = TMath::Min(0.025*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.5)*scale;
3357 if (cl->GetType()>100 ){
3358 if ((chargematch+cl->GetNy()+cl->GetNz()-nz-ny<1.5)){
3360 erry = 0.00096*scale;
3363 if (cl->GetNy()+cl->GetNz()-nz-ny<1){
3365 erry = 0.0025*scale;
3369 errz = TMath::Min(0.05*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.4)*scale;
3370 erry = TMath::Min(0.003*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.05)*scale;
3373 Float_t diff = cl->GetNy()+cl->GetNz()-ny-nz;
3377 if (cl->GetType()==5||cl->GetType()==6||cl->GetType()==7||cl->GetType()==8){
3387 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
3388 Float_t chargematch = normq/expQ;
3390 Int_t cnz = cl->GetNz()%10;
3392 if (cl->GetType()==1){
3393 if (chargematch<1.25){
3394 erry = 0.0028*(1.+6./cl->GetQ()); // gold clusters
3397 erry = 0.003*chargematch;
3398 if (cl->GetNz()==3) erry*=1.5;
3400 if (chargematch<1.0){
3401 errz = 0.0011*(1.+6./cl->GetQ());
3404 errz = 0.002*(1+2*(chargematch-1.));
3408 errz*=1.4*(cnz-nz+0.5);
3411 if (cl->GetType()>1){
3413 erry = 0.00385*(1.+6./cl->GetQ()); // gold clusters
3414 errz = 0.0016*(1.+6./cl->GetQ());
3417 errz = 0.0014*(1+3*(chargematch-1.));
3418 erry = 0.003*(1+3*(chargematch-1.));
3422 errz*=1.4*(cnz-nz+0.5);
3426 if (TMath::Abs(cl->GetY())>2.5){
3427 factorz*=1+2*(TMath::Abs(cl->GetY())-2.5);
3429 if (TMath::Abs(cl->GetY())<1){
3430 factorz*=1.+0.5*TMath::Abs(TMath::Abs(cl->GetY())-1.);
3432 factorz= TMath::Min(factorz,float(4.));
3435 erry= TMath::Min(erry,float(0.05));
3436 errz= TMath::Min(errz,float(0.05));
3442 void AliITStrackerMI::GetDCASigma(AliITStrackMI* track, Float_t & sigmarfi, Float_t &sigmaz)
3445 //DCA sigmas parameterization
3446 //to be paramterized using external parameters in future
3449 sigmarfi = 0.004+1.4 *TMath::Abs(track->GetC())+332.*track->GetC()*track->GetC();
3450 sigmaz = 0.011+4.37*TMath::Abs(track->GetC());
3454 void AliITStrackerMI::SignDeltas( TObjArray *ClusterArray, Float_t vz)
3458 Int_t entries = ClusterArray->GetEntriesFast();
3459 if (entries<4) return;
3460 AliITSRecPoint* cluster = (AliITSRecPoint*)ClusterArray->At(0);
3461 Int_t layer = cluster->GetLayer();
3462 if (layer>1) return;
3464 Int_t ncandidates=0;
3465 Float_t r = (layer>0)? 7:4;
3467 for (Int_t i=0;i<entries;i++){
3468 AliITSRecPoint* cl0 = (AliITSRecPoint*)ClusterArray->At(i);
3469 Float_t nz = 1+TMath::Abs((cl0->GetZ()-vz)/r);
3470 if (cl0->GetNy()+cl0->GetNz()<=5+2*layer+nz) continue;
3471 index[ncandidates] = i; //candidate to belong to delta electron track
3473 if (cl0->GetNy()+cl0->GetNz()>9+2*layer+nz) {
3474 cl0->SetDeltaProbability(1);
3480 for (Int_t i=0;i<ncandidates;i++){
3481 AliITSRecPoint* cl0 = (AliITSRecPoint*)ClusterArray->At(index[i]);
3482 if (cl0->GetDeltaProbability()>0.8) continue;
3485 Float_t y[100],z[100],sumy,sumz,sumy2, sumyz, sumw;
3486 sumy=sumz=sumy2=sumyz=sumw=0.0;
3487 for (Int_t j=0;j<ncandidates;j++){
3489 AliITSRecPoint* cl1 = (AliITSRecPoint*)ClusterArray->At(index[j]);
3491 Float_t dz = cl0->GetZ()-cl1->GetZ();
3492 Float_t dy = cl0->GetY()-cl1->GetY();
3493 if (TMath::Sqrt(dz*dz+dy*dy)<0.2){
3494 Float_t weight = cl1->GetNy()+cl1->GetNz()-2;
3495 y[ncl] = cl1->GetY();
3496 z[ncl] = cl1->GetZ();
3497 sumy+= y[ncl]*weight;
3498 sumz+= z[ncl]*weight;
3499 sumy2+=y[ncl]*y[ncl]*weight;
3500 sumyz+=y[ncl]*z[ncl]*weight;
3505 if (ncl<4) continue;
3506 Float_t det = sumw*sumy2 - sumy*sumy;
3508 if (TMath::Abs(det)>0.01){
3509 Float_t z0 = (sumy2*sumz - sumy*sumyz)/det;
3510 Float_t k = (sumyz*sumw - sumy*sumz)/det;
3511 delta = TMath::Abs(cl0->GetZ()-(z0+k*cl0->GetY()));
3514 Float_t z0 = sumyz/sumy;
3515 delta = TMath::Abs(cl0->GetZ()-z0);
3518 cl0->SetDeltaProbability(1-20.*delta);
3524 void AliITStrackerMI::UpdateESDtrack(AliITStrackMI* track, ULong_t flags) const
3528 track->UpdateESDtrack(flags);
3529 AliITStrackMI * oldtrack = (AliITStrackMI*)(track->GetESDtrack()->GetITStrack());
3530 if (oldtrack) delete oldtrack;
3531 track->GetESDtrack()->SetITStrack(new AliITStrackMI(*track));
3532 if (TMath::Abs(track->GetDnorm(1))<0.000000001){
3533 printf("Problem\n");
3539 Int_t AliITStrackerMI::GetNearestLayer(const Double_t *xr) const{
3541 //Get nearest upper layer close to the point xr.
3542 // rough approximation
3544 const Float_t kRadiuses[6]={4,6.5,15.03,24.,38.5,43.7};
3545 Float_t radius = TMath::Sqrt(xr[0]*xr[0]+xr[1]*xr[1]);
3547 for (Int_t i=0;i<6;i++){
3548 if (radius<kRadiuses[i]){
3557 void AliITStrackerMI::UpdateTPCV0(AliESD *event){
3559 //try to update, or reject TPC V0s
3561 Int_t nv0s = event->GetNumberOfV0s();
3562 Int_t nitstracks = fTrackHypothesys.GetEntriesFast();
3564 for (Int_t i=0;i<nv0s;i++){
3565 AliESDv0 * vertex = event->GetV0(i);
3566 Int_t ip = vertex->GetIndex(0);
3567 Int_t im = vertex->GetIndex(1);
3569 TObjArray * arrayp = (ip<nitstracks) ? (TObjArray*)fTrackHypothesys.At(ip):0;
3570 TObjArray * arraym = (im<nitstracks) ? (TObjArray*)fTrackHypothesys.At(im):0;
3571 AliITStrackMI * trackp = (arrayp!=0) ? (AliITStrackMI*)arrayp->At(0):0;
3572 AliITStrackMI * trackm = (arraym!=0) ? (AliITStrackMI*)arraym->At(0):0;
3576 if (trackp->GetNumberOfClusters()+trackp->GetNDeadZone()>5.5){
3577 if (trackp->GetConstrain()&&trackp->GetChi2MIP(0)<3) vertex->SetStatus(-100);
3578 if (!trackp->GetConstrain()&&trackp->GetChi2MIP(0)<2) vertex->SetStatus(-100);
3583 if (trackm->GetNumberOfClusters()+trackm->GetNDeadZone()>5.5){
3584 if (trackm->GetConstrain()&&trackm->GetChi2MIP(0)<3) vertex->SetStatus(-100);
3585 if (!trackm->GetConstrain()&&trackm->GetChi2MIP(0)<2) vertex->SetStatus(-100);
3588 if (vertex->GetStatus()==-100) continue;
3590 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
3591 Int_t clayer = GetNearestLayer(xrp); //I.B.
3592 vertex->SetNBefore(clayer); //
3593 vertex->SetChi2Before(9*clayer); //
3594 vertex->SetNAfter(6-clayer); //
3595 vertex->SetChi2After(0); //
3597 if (clayer >1 ){ // calculate chi2 before vertex
3598 Float_t chi2p = 0, chi2m=0;
3601 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
3602 if (trackp->GetClIndex(ilayer)>0){
3603 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+
3604 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));
3615 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
3616 if (trackm->GetClIndex(ilayer)>0){
3617 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+
3618 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));
3627 vertex->SetChi2Before(TMath::Min(chi2p,chi2m));
3628 if (TMath::Min(chi2p,chi2m)/Float_t(clayer)<4) vertex->SetStatus(-10); // track exist before vertex
3631 if (clayer < 5 ){ // calculate chi2 after vertex
3632 Float_t chi2p = 0, chi2m=0;
3634 if (trackp&&TMath::Abs(trackp->GetTgl())<1.){
3635 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
3636 if (trackp->GetClIndex(ilayer)>0){
3637 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+
3638 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));
3648 if (trackm&&TMath::Abs(trackm->GetTgl())<1.){
3649 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
3650 if (trackm->GetClIndex(ilayer)>0){
3651 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+
3652 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));
3661 vertex->SetChi2After(TMath::Max(chi2p,chi2m));
3662 if (TMath::Max(chi2m,chi2p)/Float_t(6-clayer)>9) vertex->SetStatus(-20); // track not found in ITS
3670 void AliITStrackerMI::FindV02(AliESD *event)
3675 // Cuts on DCA - R dependent
3676 // max distance DCA between 2 tracks cut
3677 // maxDist = TMath::Min(kMaxDist,kMaxDist0+pvertex->GetRr()*kMaxDist);
3679 const Float_t kMaxDist0 = 0.1;
3680 const Float_t kMaxDist1 = 0.1;
3681 const Float_t kMaxDist = 1;
3682 const Float_t kMinPointAngle = 0.85;
3683 const Float_t kMinPointAngle2 = 0.99;
3684 const Float_t kMinR = 0.5;
3685 const Float_t kMaxR = 220;
3686 //const Float_t kCausality0Cut = 0.19;
3687 //const Float_t kLikelihood01Cut = 0.25;
3688 //const Float_t kPointAngleCut = 0.9996;
3689 const Float_t kCausality0Cut = 0.19;
3690 const Float_t kLikelihood01Cut = 0.45;
3691 const Float_t kLikelihood1Cut = 0.5;
3692 const Float_t kCombinedCut = 0.55;
3696 TTreeSRedirector &cstream = *fDebugStreamer;
3697 Int_t ntracks = event->GetNumberOfTracks();
3698 Int_t nitstracks = fTrackHypothesys.GetEntriesFast();
3699 fOriginal.Expand(ntracks);
3700 fTrackHypothesys.Expand(ntracks);
3701 fBestHypothesys.Expand(ntracks);
3703 AliHelix * helixes = new AliHelix[ntracks+2];
3704 TObjArray trackarray(ntracks+2); //array with tracks - with vertex constrain
3705 TObjArray trackarrayc(ntracks+2); //array of "best tracks" - without vertex constrain
3706 TObjArray trackarrayl(ntracks+2); //array of "longest tracks" - without vertex constrain
3707 Bool_t * forbidden = new Bool_t [ntracks+2];
3708 Int_t *itsmap = new Int_t [ntracks+2];
3709 Float_t *dist = new Float_t[ntracks+2];
3710 Float_t *normdist0 = new Float_t[ntracks+2];
3711 Float_t *normdist1 = new Float_t[ntracks+2];
3712 Float_t *normdist = new Float_t[ntracks+2];
3713 Float_t *norm = new Float_t[ntracks+2];
3714 Float_t *maxr = new Float_t[ntracks+2];
3715 Float_t *minr = new Float_t[ntracks+2];
3716 Float_t *minPointAngle= new Float_t[ntracks+2];
3718 AliV0 *pvertex = new AliV0;
3719 AliITStrackMI * dummy= new AliITStrackMI;
3721 AliITStrackMI trackat0; //temporary track for DCA calculation
3723 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
3725 // make its - esd map
3727 for (Int_t itrack=0;itrack<ntracks+2;itrack++) {
3728 itsmap[itrack] = -1;
3729 forbidden[itrack] = kFALSE;
3730 maxr[itrack] = kMaxR;
3731 minr[itrack] = kMinR;
3732 minPointAngle[itrack] = kMinPointAngle;
3734 for (Int_t itrack=0;itrack<nitstracks;itrack++){
3735 AliITStrackMI * original = (AliITStrackMI*)(fOriginal.At(itrack));
3736 Int_t esdindex = original->GetESDtrack()->GetID();
3737 itsmap[esdindex] = itrack;
3740 // create its tracks from esd tracks if not done before
3742 for (Int_t itrack=0;itrack<ntracks;itrack++){
3743 if (itsmap[itrack]>=0) continue;
3744 AliITStrackMI * tpctrack = new AliITStrackMI(*(event->GetTrack(itrack)));
3745 //tpctrack->fD[0] = tpctrack->GetD(GetX(),GetY());
3746 //tpctrack->fD[1] = tpctrack->GetZat(GetX())-GetZ();
3747 tpctrack->GetDZ(GetX(),GetY(),GetZ(),tpctrack->GetDP()); //I.B.
3748 if (tpctrack->GetD(0)<20 && tpctrack->GetD(1)<20){
3749 // tracks which can reach inner part of ITS
3750 // propagate track to outer its volume - with correction for material
3751 CorrectForDeadZoneMaterial(tpctrack);
3753 itsmap[itrack] = nitstracks;
3754 fOriginal.AddAt(tpctrack,nitstracks);
3758 // fill temporary arrays
3760 for (Int_t itrack=0;itrack<ntracks;itrack++){
3761 AliESDtrack * esdtrack = event->GetTrack(itrack);
3762 Int_t itsindex = itsmap[itrack];
3763 AliITStrackMI *original = (AliITStrackMI*)fOriginal.At(itsmap[itrack]);
3764 if (!original) continue;
3765 AliITStrackMI *bestConst = 0;
3766 AliITStrackMI *bestLong = 0;
3767 AliITStrackMI *best = 0;
3770 TObjArray * array = (TObjArray*) fTrackHypothesys.At(itsindex);
3771 Int_t hentries = (array==0) ? 0 : array->GetEntriesFast();
3772 // Get best track with vertex constrain
3773 for (Int_t ih=0;ih<hentries;ih++){
3774 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
3775 if (!trackh->GetConstrain()) continue;
3776 if (!bestConst) bestConst = trackh;
3777 if (trackh->GetNumberOfClusters()>5.0){
3778 bestConst = trackh; // full track - with minimal chi2
3781 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()) continue;
3785 // Get best long track without vertex constrain and best track without vertex constrain
3786 for (Int_t ih=0;ih<hentries;ih++){
3787 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
3788 if (trackh->GetConstrain()) continue;
3789 if (!best) best = trackh;
3790 if (!bestLong) bestLong = trackh;
3791 if (trackh->GetNumberOfClusters()>5.0){
3792 bestLong = trackh; // full track - with minimal chi2
3795 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()) continue;
3800 bestLong = original;
3802 //I.B. trackat0 = *bestLong;
3803 new (&trackat0) AliITStrackMI(*bestLong);
3804 Double_t xx,yy,zz,alpha;
3805 bestLong->GetGlobalXYZat(bestLong->GetX(),xx,yy,zz);
3806 alpha = TMath::ATan2(yy,xx);
3807 trackat0.Propagate(alpha,0);
3808 // calculate normalized distances to the vertex
3810 Float_t ptfac = (1.+100.*TMath::Abs(trackat0.GetC()));
3811 if ( bestLong->GetNumberOfClusters()>3 ){
3812 dist[itsindex] = trackat0.GetY();
3813 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
3814 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
3815 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
3816 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
3818 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<6) normdist[itsindex]*=2.;
3819 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<5) normdist[itsindex]*=2.;
3820 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<4) normdist[itsindex]*=2.;
3822 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<6) normdist[itsindex]*=1.5;
3823 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<5) normdist[itsindex]*=1.5;
3827 if (bestConst&&bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5){
3828 dist[itsindex] = bestConst->GetD(0);
3829 norm[itsindex] = bestConst->GetDnorm(0);
3830 normdist0[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
3831 normdist1[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
3832 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
3834 dist[itsindex] = trackat0.GetY();
3835 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
3836 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
3837 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
3838 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
3839 if (TMath::Abs(trackat0.GetTgl())>1.05){
3840 if (normdist[itsindex]<3) forbidden[itsindex]=kTRUE;
3841 if (normdist[itsindex]>3) {
3842 minr[itsindex] = TMath::Max(Float_t(40.),minr[itsindex]);
3848 //-----------------------------------------------------------
3849 //Forbid primary track candidates -
3851 //treetr->SetAlias("forbidden0","Tr0.fN<4&&Tr1.fN+Tr1.fNDeadZone>4.5");
3852 //treetr->SetAlias("forbidden1","ND<3&&Tr1.fN+Tr1.fNDeadZone>5.5");
3853 //treetr->SetAlias("forbidden2","ND<2&&Tr1.fClIndex[0]>0&&Tr1.fClIndex[0]>0");
3854 //treetr->SetAlias("forbidden3","ND<1&&Tr1.fClIndex[0]>0");
3855 //treetr->SetAlias("forbidden4","ND<4&&Tr1.fNormChi2[0]<2");
3856 //treetr->SetAlias("forbidden5","ND<5&&Tr1.fNormChi2[0]<1");
3857 //-----------------------------------------------------------
3859 if (bestLong->GetNumberOfClusters()<4 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5) forbidden[itsindex]=kTRUE;
3860 if (normdist[itsindex]<3 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>5.5) forbidden[itsindex]=kTRUE;
3861 if (normdist[itsindex]<2 && bestConst->GetClIndex(0)>0 && bestConst->GetClIndex(1)>0 ) forbidden[itsindex]=kTRUE;
3862 if (normdist[itsindex]<1 && bestConst->GetClIndex(0)>0) forbidden[itsindex]=kTRUE;
3863 if (normdist[itsindex]<4 && bestConst->GetNormChi2(0)<2) forbidden[itsindex]=kTRUE;
3864 if (normdist[itsindex]<5 && bestConst->GetNormChi2(0)<1) forbidden[itsindex]=kTRUE;
3865 if (bestConst->GetNormChi2(0)<2.5) {
3866 minPointAngle[itsindex]= 0.9999;
3867 maxr[itsindex] = 10;
3871 //forbid daughter kink candidates
3873 if (esdtrack->GetKinkIndex(0)>0) forbidden[itsindex] = kTRUE;
3874 Bool_t isElectron = kTRUE;
3875 Bool_t isProton = kTRUE;
3877 esdtrack->GetESDpid(pid);
3878 for (Int_t i=1;i<5;i++){
3879 if (pid[0]<pid[i]) isElectron= kFALSE;
3880 if (pid[4]<pid[i]) isProton= kFALSE;
3883 forbidden[itsindex]=kFALSE;
3884 normdist[itsindex]*=-1;
3887 if (normdist[itsindex]>2) forbidden[itsindex]=kFALSE;
3888 normdist[itsindex]*=-1;
3892 // Causality cuts in TPC volume
3894 if (esdtrack->GetTPCdensity(0,10) >0.6) maxr[itsindex] = TMath::Min(Float_t(110),maxr[itsindex]);
3895 if (esdtrack->GetTPCdensity(10,30)>0.6) maxr[itsindex] = TMath::Min(Float_t(120),maxr[itsindex]);
3896 if (esdtrack->GetTPCdensity(20,40)>0.6) maxr[itsindex] = TMath::Min(Float_t(130),maxr[itsindex]);
3897 if (esdtrack->GetTPCdensity(30,50)>0.6) maxr[itsindex] = TMath::Min(Float_t(140),maxr[itsindex]);
3899 if (esdtrack->GetTPCdensity(0,60)<0.4&&bestLong->GetNumberOfClusters()<3) minr[itsindex]=100;
3905 "Tr1.="<<((bestConst)? bestConst:dummy)<<
3907 "Tr3.="<<&trackat0<<
3909 "Dist="<<dist[itsindex]<<
3910 "ND0="<<normdist0[itsindex]<<
3911 "ND1="<<normdist1[itsindex]<<
3912 "ND="<<normdist[itsindex]<<
3913 "Pz="<<primvertex[2]<<
3914 "Forbid="<<forbidden[itsindex]<<
3918 trackarray.AddAt(best,itsindex);
3919 trackarrayc.AddAt(bestConst,itsindex);
3920 trackarrayl.AddAt(bestLong,itsindex);
3921 new (&helixes[itsindex]) AliHelix(*best);
3926 // first iterration of V0 finder
3928 for (Int_t iesd0=0;iesd0<ntracks;iesd0++){
3929 Int_t itrack0 = itsmap[iesd0];
3930 if (forbidden[itrack0]) continue;
3931 AliITStrackMI * btrack0 = (AliITStrackMI*)trackarray.At(itrack0);
3932 if (!btrack0) continue;
3933 if (btrack0->GetSign()>0) continue;
3934 AliITStrackMI *trackc0 = (AliITStrackMI*)trackarrayc.At(itrack0);
3936 for (Int_t iesd1=0;iesd1<ntracks;iesd1++){
3937 Int_t itrack1 = itsmap[iesd1];
3938 if (forbidden[itrack1]) continue;
3940 AliITStrackMI * btrack1 = (AliITStrackMI*)trackarray.At(itrack1);
3941 if (!btrack1) continue;
3942 if (btrack1->GetSign()<0) continue;
3943 Bool_t isGold = kFALSE;
3944 if (TMath::Abs(TMath::Abs(btrack0->GetLabel())-TMath::Abs(btrack1->GetLabel()))==1){
3947 AliITStrackMI *trackc1 = (AliITStrackMI*)trackarrayc.At(itrack1);
3948 AliHelix &h1 = helixes[itrack0];
3949 AliHelix &h2 = helixes[itrack1];
3951 // find linear distance
3956 Double_t phase[2][2],radius[2];
3957 Int_t points = h1.GetRPHIintersections(h2, phase, radius);
3958 if (points==0) continue;
3959 Double_t delta[2]={1000000,1000000};
3961 h1.ParabolicDCA(h2,phase[0][0],phase[0][1],radius[0],delta[0]);
3963 if (radius[1]<rmin) rmin = radius[1];
3964 h1.ParabolicDCA(h2,phase[1][0],phase[1][1],radius[1],delta[1]);
3966 rmin = TMath::Sqrt(rmin);
3967 Double_t distance = 0;
3968 Double_t radiusC = 0;
3970 if (points==1 || delta[0]<delta[1]){
3971 distance = TMath::Sqrt(delta[0]);
3972 radiusC = TMath::Sqrt(radius[0]);
3974 distance = TMath::Sqrt(delta[1]);
3975 radiusC = TMath::Sqrt(radius[1]);
3978 if (radiusC<TMath::Max(minr[itrack0],minr[itrack1])) continue;
3979 if (radiusC>TMath::Min(maxr[itrack0],maxr[itrack1])) continue;
3980 Float_t maxDist = TMath::Min(kMaxDist,Float_t(kMaxDist0+radiusC*kMaxDist1));
3981 if (distance>maxDist) continue;
3982 Float_t pointAngle = h1.GetPointAngle(h2,phase[iphase],primvertex);
3983 if (pointAngle<TMath::Max(minPointAngle[itrack0],minPointAngle[itrack1])) continue;
3986 // Double_t distance = TestV0(h1,h2,pvertex,rmin);
3988 // if (distance>maxDist) continue;
3989 // if (pvertex->GetRr()<kMinR) continue;
3990 // if (pvertex->GetRr()>kMaxR) continue;
3991 AliITStrackMI * track0=btrack0;
3992 AliITStrackMI * track1=btrack1;
3993 // if (pvertex->GetRr()<3.5){
3995 //use longest tracks inside the pipe
3996 track0 = (AliITStrackMI*)trackarrayl.At(itrack0);
3997 track1 = (AliITStrackMI*)trackarrayl.At(itrack1);
4001 pvertex->SetParamN(*track0);
4002 pvertex->SetParamP(*track1);
4003 pvertex->Update(primvertex);
4004 pvertex->SetClusters(track0->ClIndex(),track1->ClIndex()); // register clusters
4006 if (pvertex->GetRr()<kMinR) continue;
4007 if (pvertex->GetRr()>kMaxR) continue;
4008 if (pvertex->GetV0CosineOfPointingAngle()<kMinPointAngle) continue;
4009 //Bo: if (pvertex->GetDist2()>maxDist) continue;
4010 if (pvertex->GetDcaV0Daughters()>maxDist) continue;
4011 //Bo: pvertex->SetLab(0,track0->GetLabel());
4012 //Bo: pvertex->SetLab(1,track1->GetLabel());
4013 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
4014 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
4016 AliITStrackMI * htrackc0 = trackc0 ? trackc0:dummy;
4017 AliITStrackMI * htrackc1 = trackc1 ? trackc1:dummy;
4021 TObjArray * array0b = (TObjArray*)fBestHypothesys.At(itrack0);
4022 if (!array0b&&pvertex->GetRr()<40 && TMath::Abs(track0->GetTgl())<1.1)
4023 FollowProlongationTree((AliITStrackMI*)fOriginal.At(itrack0),itrack0, kFALSE);
4024 TObjArray * array1b = (TObjArray*)fBestHypothesys.At(itrack1);
4025 if (!array1b&&pvertex->GetRr()<40 && TMath::Abs(track1->GetTgl())<1.1)
4026 FollowProlongationTree((AliITStrackMI*)fOriginal.At(itrack1),itrack1, kFALSE);
4028 AliITStrackMI * track0b = (AliITStrackMI*)fOriginal.At(itrack0);
4029 AliITStrackMI * track1b = (AliITStrackMI*)fOriginal.At(itrack1);
4030 AliITStrackMI * track0l = (AliITStrackMI*)fOriginal.At(itrack0);
4031 AliITStrackMI * track1l = (AliITStrackMI*)fOriginal.At(itrack1);
4033 Float_t minchi2before0=16;
4034 Float_t minchi2before1=16;
4035 Float_t minchi2after0 =16;
4036 Float_t minchi2after1 =16;
4037 Double_t xrp[3]; pvertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
4038 Int_t maxLayer = GetNearestLayer(xrp); //I.B.
4040 if (array0b) for (Int_t i=0;i<5;i++){
4041 // best track after vertex
4042 AliITStrackMI * btrack = (AliITStrackMI*)array0b->At(i);
4043 if (!btrack) continue;
4044 if (btrack->GetNumberOfClusters()>track0l->GetNumberOfClusters()) track0l = btrack;
4045 // if (btrack->fX<pvertex->GetRr()-2.-0.5/(0.1+pvertex->GetAnglep()[2])) {
4046 if (btrack->GetX()<pvertex->GetRr()-2.) {
4047 if ( (maxLayer>i+2|| (i==0)) && btrack->GetNumberOfClusters()==(6-i)&&i<3){
4050 if (maxLayer<3){ // take prim vertex as additional measurement
4051 if (normdist[itrack0]>0 && htrackc0){
4052 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack0]*normdist[itrack0],16.);
4054 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack0]*normdist[itrack0]+3.),16.);
4058 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
4060 if (!btrack->GetClIndex(ilayer)){
4064 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
4065 for (Int_t itrack=0;itrack<4;itrack++){
4066 if (fgLayers[ilayer].GetClusterTracks(itrack,c)>=0 && fgLayers[ilayer].GetClusterTracks(itrack,c)!=itrack0){
4067 sumchi2+=18.; //shared cluster
4071 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
4072 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
4076 if (sumchi2<minchi2before0) minchi2before0=sumchi2;
4078 continue; //safety space - Geo manager will give exact layer
4081 minchi2after0 = btrack->GetNormChi2(i);
4084 if (array1b) for (Int_t i=0;i<5;i++){
4085 // best track after vertex
4086 AliITStrackMI * btrack = (AliITStrackMI*)array1b->At(i);
4087 if (!btrack) continue;
4088 if (btrack->GetNumberOfClusters()>track1l->GetNumberOfClusters()) track1l = btrack;
4089 // if (btrack->fX<pvertex->GetRr()-2-0.5/(0.1+pvertex->GetAnglep()[2])){
4090 if (btrack->GetX()<pvertex->GetRr()-2){
4091 if ((maxLayer>i+2 || (i==0))&&btrack->GetNumberOfClusters()==(6-i)&&(i<3)){
4094 if (maxLayer<3){ // take prim vertex as additional measurement
4095 if (normdist[itrack1]>0 && htrackc1){
4096 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack1]*normdist[itrack1],16.);
4098 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack1]*normdist[itrack1]+3.),16.);
4102 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
4104 if (!btrack->GetClIndex(ilayer)){
4108 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
4109 for (Int_t itrack=0;itrack<4;itrack++){
4110 if (fgLayers[ilayer].GetClusterTracks(itrack,c)>=0 && fgLayers[ilayer].GetClusterTracks(itrack,c)!=itrack1){
4111 sumchi2+=18.; //shared cluster
4115 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
4116 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
4120 if (sumchi2<minchi2before1) minchi2before1=sumchi2;
4122 continue; //safety space - Geo manager will give exact layer
4125 minchi2after1 = btrack->GetNormChi2(i);
4129 // position resolution - used for DCA cut
4130 Float_t sigmad = track0b->GetSigmaY2()+track0b->GetSigmaZ2()+track1b->GetSigmaY2()+track1b->GetSigmaZ2()+
4131 (track0b->GetX()-pvertex->GetRr())*(track0b->GetX()-pvertex->GetRr())*(track0b->GetSigmaSnp2()+track0b->GetSigmaTgl2())+
4132 (track1b->GetX()-pvertex->GetRr())*(track1b->GetX()-pvertex->GetRr())*(track1b->GetSigmaSnp2()+track1b->GetSigmaTgl2());
4133 sigmad =TMath::Sqrt(sigmad)+0.04;
4134 if (pvertex->GetRr()>50){
4135 Double_t cov0[15],cov1[15];
4136 track0b->GetESDtrack()->GetInnerExternalCovariance(cov0);
4137 track1b->GetESDtrack()->GetInnerExternalCovariance(cov1);
4138 sigmad = cov0[0]+cov0[2]+cov1[0]+cov1[2]+
4139 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov0[5]+cov0[9])+
4140 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov1[5]+cov1[9]);
4141 sigmad =TMath::Sqrt(sigmad)+0.05;
4145 vertex2.SetParamN(*track0b);
4146 vertex2.SetParamP(*track1b);
4147 vertex2.Update(primvertex);
4148 //Bo: if (vertex2.GetDist2()<=pvertex->GetDist2()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
4149 if (vertex2.GetDcaV0Daughters()<=pvertex->GetDcaV0Daughters()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
4150 pvertex->SetParamN(*track0b);
4151 pvertex->SetParamP(*track1b);
4152 pvertex->Update(primvertex);
4153 pvertex->SetClusters(track0b->ClIndex(),track1b->ClIndex()); // register clusters
4154 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
4155 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
4157 pvertex->SetDistSigma(sigmad);
4158 //Bo: pvertex->SetDistNorm(pvertex->GetDist2()/sigmad);
4159 pvertex->SetNormDCAPrim(normdist[itrack0],normdist[itrack1]);
4161 // define likelihhod and causalities
4163 Float_t pa0=1, pa1=1, pb0=0.26, pb1=0.26;
4165 Float_t fnorm0 = normdist[itrack0];
4166 if (fnorm0<0) fnorm0*=-3;
4167 Float_t fnorm1 = normdist[itrack1];
4168 if (fnorm1<0) fnorm1*=-3;
4169 if (pvertex->GetAnglep()[2]>0.1 || (pvertex->GetRr()<10.5)&& pvertex->GetAnglep()[2]>0.05 || pvertex->GetRr()<3){
4170 pb0 = TMath::Exp(-TMath::Min(fnorm0,Float_t(16.))/12.);
4171 pb1 = TMath::Exp(-TMath::Min(fnorm1,Float_t(16.))/12.);
4173 pvertex->SetChi2Before(normdist[itrack0]);
4174 pvertex->SetChi2After(normdist[itrack1]);
4175 pvertex->SetNAfter(0);
4176 pvertex->SetNBefore(0);
4178 pvertex->SetChi2Before(minchi2before0);
4179 pvertex->SetChi2After(minchi2before1);
4180 if (pvertex->GetAnglep()[2]>0.1 || ( pvertex->GetRr()<10.5 && pvertex->GetAnglep()[2]>0.05) || pvertex->GetRr()<3){
4181 pb0 = TMath::Exp(-TMath::Min(minchi2before0,Float_t(16))/12.);
4182 pb1 = TMath::Exp(-TMath::Min(minchi2before1,Float_t(16))/12.);
4184 pvertex->SetNAfter(maxLayer);
4185 pvertex->SetNBefore(maxLayer);
4187 if (pvertex->GetRr()<90){
4188 pa0 *= TMath::Min(track0->GetESDtrack()->GetTPCdensity(0,60),Float_t(1.));
4189 pa1 *= TMath::Min(track1->GetESDtrack()->GetTPCdensity(0,60),Float_t(1.));
4191 if (pvertex->GetRr()<20){
4192 pa0 *= (0.2+TMath::Exp(-TMath::Min(minchi2after0,Float_t(16))/8.))/1.2;
4193 pa1 *= (0.2+TMath::Exp(-TMath::Min(minchi2after1,Float_t(16))/8.))/1.2;
4196 pvertex->SetCausality(pb0,pb1,pa0,pa1);
4198 // Likelihood calculations - apply cuts
4200 Bool_t v0OK = kTRUE;
4201 Float_t p12 = pvertex->GetParamP()->GetParameter()[4]*pvertex->GetParamP()->GetParameter()[4];
4202 p12 += pvertex->GetParamN()->GetParameter()[4]*pvertex->GetParamN()->GetParameter()[4];
4203 p12 = TMath::Sqrt(p12); // "mean" momenta
4204 Float_t sigmap0 = 0.0001+0.001/(0.1+pvertex->GetRr());
4205 Float_t sigmap = 0.5*sigmap0*(0.6+0.4*p12); // "resolution: of point angle - as a function of radius and momenta
4207 Float_t causalityA = (1.0-pvertex->GetCausalityP()[0])*(1.0-pvertex->GetCausalityP()[1]);
4208 Float_t causalityB = TMath::Sqrt(TMath::Min(pvertex->GetCausalityP()[2],Float_t(0.7))*
4209 TMath::Min(pvertex->GetCausalityP()[3],Float_t(0.7)));
4211 //Bo: Float_t likelihood0 = (TMath::Exp(-pvertex->GetDistNorm())+0.1) *(pvertex->GetDist2()<0.5)*(pvertex->GetDistNorm()<5);
4212 Float_t lDistNorm = pvertex->GetDcaV0Daughters()/pvertex->GetDistSigma();
4213 Float_t likelihood0 = (TMath::Exp(-lDistNorm)+0.1) *(pvertex->GetDcaV0Daughters()<0.5)*(lDistNorm<5);
4215 Float_t likelihood1 = TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/sigmap)+
4216 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(4.*sigmap))+
4217 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(8.*sigmap))+
4218 0.1*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/0.01);
4220 if (causalityA<kCausality0Cut) v0OK = kFALSE;
4221 if (TMath::Sqrt(likelihood0*likelihood1)<kLikelihood01Cut) v0OK = kFALSE;
4222 if (likelihood1<kLikelihood1Cut) v0OK = kFALSE;
4223 if (TMath::Power(likelihood0*likelihood1*causalityB,0.33)<kCombinedCut) v0OK = kFALSE;
4228 Bool_t gold = TMath::Abs(TMath::Abs(track0->GetLabel())-TMath::Abs(track1->GetLabel()))==1;
4230 "Tr0.="<<track0<< //best without constrain
4231 "Tr1.="<<track1<< //best without constrain
4232 "Tr0B.="<<track0b<< //best without constrain after vertex
4233 "Tr1B.="<<track1b<< //best without constrain after vertex
4234 "Tr0C.="<<htrackc0<< //best with constrain if exist
4235 "Tr1C.="<<htrackc1<< //best with constrain if exist
4236 "Tr0L.="<<track0l<< //longest best
4237 "Tr1L.="<<track1l<< //longest best
4238 "Esd0.="<<track0->GetESDtrack()<< // esd track0 params
4239 "Esd1.="<<track1->GetESDtrack()<< // esd track1 params
4240 "V0.="<<pvertex<< //vertex properties
4241 "V0b.="<<&vertex2<< //vertex properties at "best" track
4242 "ND0="<<normdist[itrack0]<< //normalize distance for track0
4243 "ND1="<<normdist[itrack1]<< //normalize distance for track1
4245 // "RejectBase="<<rejectBase<< //rejection in First itteration
4251 //if (rejectBase) continue;
4253 pvertex->SetStatus(0);
4254 // if (rejectBase) {
4255 // pvertex->SetStatus(-100);
4257 if (pvertex->GetV0CosineOfPointingAngle()>kMinPointAngle2) {
4258 //Bo: pvertex->SetESDindexes(track0->GetESDtrack()->GetID(),track1->GetESDtrack()->GetID());
4259 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());//Bo: consistency 0 for neg
4260 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());//Bo: consistency 1 for pos
4262 // AliV0vertex vertexjuri(*track0,*track1);
4263 // vertexjuri.SetESDindexes(track0->fESDtrack->GetID(),track1->fESDtrack->GetID());
4264 // event->AddV0(&vertexjuri);
4265 pvertex->SetStatus(100);
4267 pvertex->SetOnFlyStatus(kTRUE);
4268 pvertex->ChangeMassHypothesis(kK0Short);
4269 event->AddV0(pvertex);
4275 // delete temporary arrays
4277 delete[] minPointAngle;
4291 void AliITStrackerMI::RefitV02(AliESD *event)
4294 //try to refit V0s in the third path of the reconstruction
4296 TTreeSRedirector &cstream = *fDebugStreamer;
4298 Int_t nv0s = event->GetNumberOfV0s();
4299 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
4301 for (Int_t iv0 = 0; iv0<nv0s;iv0++){
4302 AliV0 * v0mi = (AliV0*)event->GetV0(iv0);
4303 if (!v0mi) continue;
4304 Int_t itrack0 = v0mi->GetIndex(0);
4305 Int_t itrack1 = v0mi->GetIndex(1);
4306 AliESDtrack *esd0 = event->GetTrack(itrack0);
4307 AliESDtrack *esd1 = event->GetTrack(itrack1);
4308 if (!esd0||!esd1) continue;
4309 AliITStrackMI tpc0(*esd0);
4310 AliITStrackMI tpc1(*esd1);
4311 Double_t x,y,z; v0mi->GetXYZ(x,y,z); //I.B.
4312 Double_t alpha =TMath::ATan2(y,x); //I.B.
4313 if (v0mi->GetRr()>85){
4314 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
4315 v0temp.SetParamN(tpc0);
4316 v0temp.SetParamP(tpc1);
4317 v0temp.Update(primvertex);
4318 if (kFALSE) cstream<<"Refit"<<
4320 "V0refit.="<<&v0temp<<
4324 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4325 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4326 v0mi->SetParamN(tpc0);
4327 v0mi->SetParamP(tpc1);
4328 v0mi->Update(primvertex);
4333 if (v0mi->GetRr()>35){
4334 CorrectForDeadZoneMaterial(&tpc0);
4335 CorrectForDeadZoneMaterial(&tpc1);
4336 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
4337 v0temp.SetParamN(tpc0);
4338 v0temp.SetParamP(tpc1);
4339 v0temp.Update(primvertex);
4340 if (kFALSE) cstream<<"Refit"<<
4342 "V0refit.="<<&v0temp<<
4346 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4347 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4348 v0mi->SetParamN(tpc0);
4349 v0mi->SetParamP(tpc1);
4350 v0mi->Update(primvertex);
4355 CorrectForDeadZoneMaterial(&tpc0);
4356 CorrectForDeadZoneMaterial(&tpc1);
4357 // if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
4358 if (RefitAt(v0mi->GetRr(),&tpc0, v0mi->GetClusters(0)) && RefitAt(v0mi->GetRr(),&tpc1, v0mi->GetClusters(1))){
4359 v0temp.SetParamN(tpc0);
4360 v0temp.SetParamP(tpc1);
4361 v0temp.Update(primvertex);
4362 if (kFALSE) cstream<<"Refit"<<
4364 "V0refit.="<<&v0temp<<
4368 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4369 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4370 v0mi->SetParamN(tpc0);
4371 v0mi->SetParamP(tpc1);
4372 v0mi->Update(primvertex);