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>
32 #include "AliESDEvent.h"
35 #include "AliITSRecPoint.h"
36 #include "AliITSgeomTGeo.h"
37 #include "AliITStrackerMI.h"
38 #include "AliITSReconstructor.h"
39 #include "AliTrackPointArray.h"
40 #include "AliAlignObj.h"
42 ClassImp(AliITStrackerMI)
46 AliITStrackerMI::AliITSlayer AliITStrackerMI::fgLayers[kMaxLayer]; // ITS layers
48 AliITStrackerMI::AliITStrackerMI():AliTracker(),
58 fLastLayerToTrackTo(0),
64 //------------------------------------------------------------------------
65 AliITStrackerMI::AliITStrackerMI(const Char_t *geom) : AliTracker(),
75 fLastLayerToTrackTo(kLastLayerToTrackTo),
79 //--------------------------------------------------------------------
80 //This is the AliITStrackerMI constructor
81 //--------------------------------------------------------------------
83 AliWarning("\"geom\" is actually a dummy argument !");
89 for (Int_t i=1; i<kMaxLayer+1; i++) {
90 Int_t nlad=AliITSgeomTGeo::GetNLadders(i);
91 Int_t ndet=AliITSgeomTGeo::GetNDetectors(i);
93 Double_t xyz[3], &x=xyz[0], &y=xyz[1], &z=xyz[2];
94 AliITSgeomTGeo::GetOrigTranslation(i,1,1,xyz);
95 Double_t poff=TMath::ATan2(y,x);
97 Double_t r=TMath::Sqrt(x*x + y*y);
99 AliITSgeomTGeo::GetOrigTranslation(i,1,2,xyz);
100 r += TMath::Sqrt(x*x + y*y);
101 AliITSgeomTGeo::GetOrigTranslation(i,2,1,xyz);
102 r += TMath::Sqrt(x*x + y*y);
103 AliITSgeomTGeo::GetOrigTranslation(i,2,2,xyz);
104 r += TMath::Sqrt(x*x + y*y);
107 new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet);
109 for (Int_t j=1; j<nlad+1; j++) {
110 for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors
111 TGeoHMatrix m; AliITSgeomTGeo::GetOrigMatrix(i,j,k,m);
112 const TGeoHMatrix *tm=AliITSgeomTGeo::GetTracking2LocalMatrix(i,j,k);
114 Double_t txyz[3]={0.}, xyz[3]={0.};
115 m.LocalToMaster(txyz,xyz);
116 Double_t r=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
117 Double_t phi=TMath::ATan2(xyz[1],xyz[0]);
119 if (phi<0) phi+=TMath::TwoPi();
120 else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi();
122 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
123 new(&det) AliITSdetector(r,phi);
132 fConstraint[0]=1; fConstraint[1]=0;
134 Double_t xyz[]={AliITSReconstructor::GetRecoParam()->GetXVdef(),
135 AliITSReconstructor::GetRecoParam()->GetYVdef(),
136 AliITSReconstructor::GetRecoParam()->GetZVdef()};
137 Double_t ers[]={AliITSReconstructor::GetRecoParam()->GetSigmaXVdef(),
138 AliITSReconstructor::GetRecoParam()->GetSigmaYVdef(),
139 AliITSReconstructor::GetRecoParam()->GetSigmaZVdef()};
142 for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=kLayersNotToSkip[i];
143 fLastLayerToTrackTo=kLastLayerToTrackTo;
144 for (Int_t i=0;i<100000;i++){
145 fBestTrackIndex[i]=0;
148 fDebugStreamer = new TTreeSRedirector("ITSdebug.root");
151 //------------------------------------------------------------------------
152 AliITStrackerMI::AliITStrackerMI(const AliITStrackerMI &tracker):AliTracker(tracker),
154 fBestTrack(tracker.fBestTrack),
155 fTrackToFollow(tracker.fTrackToFollow),
156 fTrackHypothesys(tracker.fTrackHypothesys),
157 fBestHypothesys(tracker.fBestHypothesys),
158 fOriginal(tracker.fOriginal),
159 fCurrentEsdTrack(tracker.fCurrentEsdTrack),
160 fPass(tracker.fPass),
161 fAfterV0(tracker.fAfterV0),
162 fLastLayerToTrackTo(tracker.fLastLayerToTrackTo),
163 fCoeficients(tracker.fCoeficients),
165 fDebugStreamer(tracker.fDebugStreamer){
168 //------------------------------------------------------------------------
169 AliITStrackerMI & AliITStrackerMI::operator=(const AliITStrackerMI &tracker){
170 //Assignment operator
171 this->~AliITStrackerMI();
172 new(this) AliITStrackerMI(tracker);
175 //------------------------------------------------------------------------
176 AliITStrackerMI::~AliITStrackerMI()
181 if (fCoeficients) delete []fCoeficients;
182 if (fDebugStreamer) {
183 //fDebugStreamer->Close();
184 delete fDebugStreamer;
187 //------------------------------------------------------------------------
188 void AliITStrackerMI::SetLayersNotToSkip(Int_t *l) {
189 //--------------------------------------------------------------------
190 //This function set masks of the layers which must be not skipped
191 //--------------------------------------------------------------------
192 for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=l[i];
194 //------------------------------------------------------------------------
195 Int_t AliITStrackerMI::LoadClusters(TTree *cTree) {
196 //--------------------------------------------------------------------
197 //This function loads ITS clusters
198 //--------------------------------------------------------------------
199 TBranch *branch=cTree->GetBranch("ITSRecPoints");
201 Error("LoadClusters"," can't get the branch !\n");
205 TClonesArray dummy("AliITSRecPoint",10000), *clusters=&dummy;
206 branch->SetAddress(&clusters);
210 for (Int_t i=0; i<kMaxLayer; i++) {
211 Int_t ndet=fgLayers[i].GetNdetectors();
212 Int_t jmax = j + fgLayers[i].GetNladders()*ndet;
213 for (; j<jmax; j++) {
214 if (!cTree->GetEvent(j)) continue;
215 Int_t ncl=clusters->GetEntriesFast();
216 SignDeltas(clusters,GetZ());
219 AliITSRecPoint *c=(AliITSRecPoint*)clusters->UncheckedAt(ncl);
220 detector=c->GetDetectorIndex();
222 if (!c->Misalign()) AliWarning("Can't misalign this cluster !");
224 fgLayers[i].InsertCluster(new AliITSRecPoint(*c));
227 //add dead zone virtual "cluster"
229 for (Float_t ydead = 0; ydead < 1.31 ; ydead+=(i+1.)*0.018){
230 Int_t lab[4] = {0,0,0,detector};
231 Int_t info[3] = {0,0,i};
232 Float_t hit[5]={0,0,0.004/12.,0.001/12.,0};
233 if (i==0) hit[0] =ydead-0.4;
234 if (i==1) hit[0]=ydead-3.75;
236 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
237 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
239 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
240 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
242 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
243 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
245 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
246 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
248 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
249 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
251 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<2.)
252 fgLayers[i].InsertCluster(new AliITSRecPoint(lab, hit, info));
258 fgLayers[i].ResetRoad(); //road defined by the cluster density
259 fgLayers[i].SortClusters();
264 //------------------------------------------------------------------------
265 void AliITStrackerMI::UnloadClusters() {
266 //--------------------------------------------------------------------
267 //This function unloads ITS clusters
268 //--------------------------------------------------------------------
269 for (Int_t i=0; i<kMaxLayer; i++) fgLayers[i].ResetClusters();
271 //------------------------------------------------------------------------
272 static Int_t CorrectForDeadZoneMaterial(AliITStrackMI *t) {
273 //--------------------------------------------------------------------
274 // Correction for the material between the TPC and the ITS
275 // (should it belong to the TPC code ?)
276 //--------------------------------------------------------------------
277 Double_t riw=80., diw=0.0053, x0iw=30; // TPC inner wall ?
278 Double_t rcd=61., dcd=0.0053, x0cd=30; // TPC "central drum" ?
279 Double_t yr=12.8, dr=0.03; // rods ?
280 Double_t zm=0.2, dm=0.40; // membrane
281 //Double_t rr=52., dr=0.19, x0r=24., yyr=7.77; //rails
282 Double_t rs=50., ds=0.001; // something belonging to the ITS (screen ?)
284 if (t->GetX() > riw) {
285 if (!t->PropagateTo(riw,diw,x0iw)) return 1;
286 if (TMath::Abs(t->GetY())>yr) t->CorrectForMaterial(dr);
287 if (TMath::Abs(t->GetZ())<zm) t->CorrectForMaterial(dm);
288 if (!t->PropagateTo(rcd,dcd,x0cd)) 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(rs,ds)) return 1;
292 } else if (t->GetX() < rs) {
293 if (!t->PropagateTo(rs,-ds)) return 1;
294 //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z);
295 //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,-dr,x0r);
296 if (!t->PropagateTo(rcd,-dcd,x0cd)) return 1;
297 if (!t->PropagateTo(riw+0.001,-diw,x0iw)) return 1;
299 ::Error("CorrectForDeadZoneMaterial","track is already in the dead zone !");
305 //------------------------------------------------------------------------
306 Int_t AliITStrackerMI::Clusters2Tracks(AliESDEvent *event) {
307 //--------------------------------------------------------------------
308 // This functions reconstructs ITS tracks
309 // The clusters must be already loaded !
310 //--------------------------------------------------------------------
311 TObjArray itsTracks(15000);
313 fEsd = event; // store pointer to the esd
314 {/* Read ESD tracks */
315 Int_t nentr=event->GetNumberOfTracks();
316 Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr);
318 AliESDtrack *esd=event->GetTrack(nentr);
320 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue;
321 if (esd->GetStatus()&AliESDtrack::kTPCout) continue;
322 if (esd->GetStatus()&AliESDtrack::kITSin) continue;
323 if (esd->GetKinkIndex(0)>0) continue; //kink daughter
326 t=new AliITStrackMI(*esd);
327 } catch (const Char_t *msg) {
328 //Warning("Clusters2Tracks",msg);
332 //t->fD[0] = t->GetD(GetX(),GetY());
333 //t->fD[1] = t->GetZat(GetX())-GetZ();
334 t->GetDZ(GetX(),GetY(),GetZ(),t->GetDP()); //I.B.
335 Double_t vdist = TMath::Sqrt(t->GetD(0)*t->GetD(0)+t->GetD(1)*t->GetD(1));
336 if (t->GetMass()<0.13) t->SetMass(0.13957); // MI look to the esd - mass hypothesys !!!!!!!!!!!
338 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
340 if (esd->GetV0Index(0)>0 && t->GetD(0)<30){
341 //track - can be V0 according to TPC
344 if (TMath::Abs(t->GetD(0))>10) {
349 if (TMath::Abs(vdist)>20) {
353 if (TMath::Abs(1/t->Get1Pt())<0.120) {
358 if (CorrectForDeadZoneMaterial(t)!=0) {
359 //Warning("Clusters2Tracks",
360 // "failed to correct for the material in the dead zone !\n");
365 t->SetReconstructed(kFALSE);
366 itsTracks.AddLast(t);
367 fOriginal.AddLast(t);
369 } /* End Read ESD tracks */
373 Int_t nentr=itsTracks.GetEntriesFast();
374 fTrackHypothesys.Expand(nentr);
375 fBestHypothesys.Expand(nentr);
376 MakeCoeficients(nentr);
378 for (fPass=0; fPass<2; fPass++) {
379 Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
380 for (Int_t i=0; i<nentr; i++) {
381 // cerr<<fPass<<" "<<i<<'\r';
382 fCurrentEsdTrack = i;
383 AliITStrackMI *t=(AliITStrackMI*)itsTracks.UncheckedAt(i);
384 if (t==0) continue; //this track has been already tracked
385 if (t->GetReconstructed()&&(t->GetNUsed()<1.5)) continue; //this track was already "succesfully" reconstructed
386 //if ( (TMath::Abs(t->GetD(GetX(),GetY())) >3.) && fConstraint[fPass]) continue;
387 //if ( (TMath::Abs(t->GetZat(GetX())-GetZ())>3.) && fConstraint[fPass]) continue;
388 Float_t dz[2]; t->GetDZ(GetX(),GetY(),GetZ(),dz); //I.B.
389 if ( (TMath::Abs(dz[0])>3.) && fConstraint[fPass]) continue;
390 if ( (TMath::Abs(dz[1])>3.) && fConstraint[fPass]) continue;
392 Int_t tpcLabel=t->GetLabel(); //save the TPC track label
394 ResetTrackToFollow(*t);
396 FollowProlongationTree(t,i,fConstraint[fPass]);
398 SortTrackHypothesys(fCurrentEsdTrack,20,0); //MI change
400 AliITStrackMI * besttrack = GetBestHypothesys(fCurrentEsdTrack,t,15);
401 if (!besttrack) continue;
402 besttrack->SetLabel(tpcLabel);
403 // besttrack->CookdEdx();
405 besttrack->SetFakeRatio(1.);
406 CookLabel(besttrack,0.); //For comparison only
407 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
410 if ( besttrack->GetNumberOfClusters()<6 && fConstraint[fPass]) {
413 if (besttrack->fChi2MIP[0]+besttrack->fNUsed>3.5) continue;
414 if ( (TMath::Abs(besttrack->fD[0]*besttrack->fD[0]+besttrack->fD[1]*besttrack->fD[1])>0.1) && fConstraint[fPass]) continue;
415 //delete itsTracks.RemoveAt(i);
417 if (fConstraint[fPass]&&(!besttrack->IsGoldPrimary())) continue; //to be tracked also without vertex constrain
420 t->SetReconstructed(kTRUE);
423 GetBestHypothesysMIP(itsTracks);
426 //GetBestHypothesysMIP(itsTracks);
430 //GetBestHypothesysMIP(itsTracks);
434 Int_t entries = fTrackHypothesys.GetEntriesFast();
435 for (Int_t ientry=0;ientry<entries;ientry++){
436 TObjArray * array =(TObjArray*)fTrackHypothesys.UncheckedAt(ientry);
437 if (array) array->Delete();
438 delete fTrackHypothesys.RemoveAt(ientry);
441 fTrackHypothesys.Delete();
442 fBestHypothesys.Delete();
444 delete []fCoeficients;
446 Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk);
450 //------------------------------------------------------------------------
451 Int_t AliITStrackerMI::PropagateBack(AliESDEvent *event) {
452 //--------------------------------------------------------------------
453 // This functions propagates reconstructed ITS tracks back
454 // The clusters must be loaded !
455 //--------------------------------------------------------------------
456 Int_t nentr=event->GetNumberOfTracks();
457 Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
460 for (Int_t i=0; i<nentr; i++) {
461 AliESDtrack *esd=event->GetTrack(i);
463 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
464 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
468 t=new AliITStrackMI(*esd);
469 } catch (const Char_t *msg) {
470 //Warning("PropagateBack",msg);
474 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
476 ResetTrackToFollow(*t);
478 // propagete to vertex [SR, GSI 17.02.2003]
479 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
480 if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {
481 if (fTrackToFollow.PropagateToVertex(event->GetVertex())) {
482 fTrackToFollow.StartTimeIntegral();
484 fTrackToFollow.PropagateTo(3.,-0.0028,65.19);
487 fTrackToFollow.ResetCovariance(10.); fTrackToFollow.ResetClusters();
488 if (RefitAt(49.,&fTrackToFollow,t)) {
489 if (CorrectForDeadZoneMaterial(&fTrackToFollow)!=0) {
490 //Warning("PropagateBack",
491 // "failed to correct for the material in the dead zone !\n");
495 fTrackToFollow.SetLabel(t->GetLabel());
496 //fTrackToFollow.CookdEdx();
497 CookLabel(&fTrackToFollow,0.); //For comparison only
498 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
499 //UseClusters(&fTrackToFollow);
505 Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk);
509 //------------------------------------------------------------------------
510 Int_t AliITStrackerMI::RefitInward(AliESDEvent *event) {
511 //--------------------------------------------------------------------
512 // This functions refits ITS tracks using the
513 // "inward propagated" TPC tracks
514 // The clusters must be loaded !
515 //--------------------------------------------------------------------
517 Int_t nentr=event->GetNumberOfTracks();
518 Info("RefitInward", "Number of ESD tracks: %d\n", nentr);
521 for (Int_t i=0; i<nentr; i++) {
522 AliESDtrack *esd=event->GetTrack(i);
524 if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
525 if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
526 if (esd->GetStatus()&AliESDtrack::kTPCout)
527 if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
531 t=new AliITStrackMI(*esd);
532 } catch (const Char_t *msg) {
533 //Warning("RefitInward",msg);
537 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
538 if (CorrectForDeadZoneMaterial(t)!=0) {
539 //Warning("RefitInward",
540 // "failed to correct for the material in the dead zone !\n");
545 ResetTrackToFollow(*t);
546 fTrackToFollow.ResetClusters();
548 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
549 fTrackToFollow.ResetCovariance(10.);
552 if (RefitAt(3.7, &fTrackToFollow, t,kTRUE)) {
553 fTrackToFollow.SetLabel(t->GetLabel());
554 // fTrackToFollow.CookdEdx();
555 CookdEdx(&fTrackToFollow);
557 CookLabel(&fTrackToFollow,0.0); //For comparison only
559 if (fTrackToFollow.PropagateTo(3.,0.0028,65.19)) {//The beam pipe
560 AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack();
561 esdTrack->UpdateTrackParams(&fTrackToFollow,AliESDtrack::kITSrefit);
562 Float_t r[3]={0.,0.,0.};
564 esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD);
571 Info("RefitInward","Number of refitted tracks: %d\n",ntrk);
575 //------------------------------------------------------------------------
576 AliCluster *AliITStrackerMI::GetCluster(Int_t index) const {
577 //--------------------------------------------------------------------
578 // Return pointer to a given cluster
579 //--------------------------------------------------------------------
580 Int_t l=(index & 0xf0000000) >> 28;
581 Int_t c=(index & 0x0fffffff) >> 00;
582 return fgLayers[l].GetCluster(c);
585 Bool_t AliITStrackerMI::GetTrackPoint(Int_t index, AliTrackPoint& p) const {
587 // Get track space point with index i
590 Int_t l=(index & 0xf0000000) >> 28;
591 Int_t c=(index & 0x0fffffff) >> 00;
592 AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
593 Int_t idet = cl->GetDetectorIndex();
597 cl->GetGlobalXYZ(xyz);
598 cl->GetGlobalCov(cov);
601 AliGeomManager::ELayerID iLayer = AliGeomManager::kInvalidLayer;
604 iLayer = AliGeomManager::kSPD1;
607 iLayer = AliGeomManager::kSPD2;
610 iLayer = AliGeomManager::kSDD1;
613 iLayer = AliGeomManager::kSDD2;
616 iLayer = AliGeomManager::kSSD1;
619 iLayer = AliGeomManager::kSSD2;
622 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
625 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,idet);
626 p.SetVolumeID((UShort_t)volid);
629 //------------------------------------------------------------------------
630 void AliITStrackerMI::FollowProlongationTree(AliITStrackMI * otrack, Int_t esdindex, Bool_t constrain)
632 //--------------------------------------------------------------------
633 // Follow prolongation tree
634 //--------------------------------------------------------------------
636 AliESDtrack * esd = otrack->GetESDtrack();
637 if (esd->GetV0Index(0)>0){
639 // TEMPORARY SOLLUTION: map V0 indexes to point to proper track
640 // mapping of esd track is different as its track in Containers
641 // Need something more stable
642 // Indexes are set back again to the ESD track indexes in UpdateTPCV0
643 for (Int_t i=0;i<3;i++){
644 Int_t index = esd->GetV0Index(i);
646 AliESDv0 * vertex = fEsd->GetV0(index);
647 if (vertex->GetStatus()<0) continue; // rejected V0
649 if (esd->GetSign()>0) {
650 vertex->SetIndex(0,esdindex);
653 vertex->SetIndex(1,esdindex);
657 TObjArray *bestarray = (TObjArray*)fBestHypothesys.At(esdindex);
659 bestarray = new TObjArray(5);
660 fBestHypothesys.AddAt(bestarray,esdindex);
664 //setup tree of the prolongations
666 static AliITStrackMI tracks[7][100];
667 AliITStrackMI *currenttrack;
668 static AliITStrackMI currenttrack1;
669 static AliITStrackMI currenttrack2;
670 static AliITStrackMI backuptrack;
672 Int_t nindexes[7][100];
673 Float_t normalizedchi2[100];
674 for (Int_t ilayer=0;ilayer<6;ilayer++) ntracks[ilayer]=0;
675 otrack->SetNSkipped(0);
676 new (&(tracks[6][0])) AliITStrackMI(*otrack);
678 for (Int_t i=0;i<7;i++) nindexes[i][0]=0;
681 // follow prolongations
682 for (Int_t ilayer=5;ilayer>=0;ilayer--){
684 AliITSlayer &layer=fgLayers[ilayer];
685 Double_t r=layer.GetR();
691 for (Int_t itrack =0;itrack<ntracks[ilayer+1];itrack++){
693 if (ntracks[ilayer]>=100) break;
694 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0) nskipped++;
695 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2.) nused++;
696 if (ntracks[ilayer]>15+ilayer){
697 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0 && nskipped>4+ilayer) continue;
698 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2. && nused>3) continue;
701 new(¤ttrack1) AliITStrackMI(tracks[ilayer+1][nindexes[ilayer+1][itrack]]);
703 // material between SSD and SDD, SDD and SPD (to be done with TGeo) //AD
704 if (ilayer==3 || ilayer==1) {
705 Double_t rshield,dshield,x0shield;
706 if(ilayer==3) { // SDDouter
707 rshield=0.5*(fgLayers[ilayer+1].GetR() + r);
715 if (!currenttrack1.PropagateTo(rshield,dshield,x0shield)) continue;
719 if (!currenttrack1.GetPhiZat(r,phi,z)) continue;
721 Int_t idet=layer.FindDetectorIndex(phi,z);
722 if (idet<0) continue;
724 //propagate to the intersection
725 const AliITSdetector &det=layer.GetDetector(idet);
726 new(¤ttrack2) AliITStrackMI(currenttrack1);
727 if (!currenttrack1.Propagate(det.GetPhi(),det.GetR())) continue;
728 currenttrack2.Propagate(det.GetPhi(),det.GetR());
729 currenttrack1.SetDetectorIndex(idet);
730 currenttrack2.SetDetectorIndex(idet);
733 // definition of search road for clusters selection
734 Double_t dz=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadZ()*
735 TMath::Sqrt(currenttrack1.GetSigmaZ2() +
736 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
737 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
738 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer));
739 Double_t dy=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadY()*
740 TMath::Sqrt(currenttrack1.GetSigmaY2() +
741 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
742 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
743 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer));
745 // track at boundary between detectors, enlarge road
746 if ( (currenttrack1.GetY()-dy < det.GetYmin()+0.2) ||
747 (currenttrack1.GetY()+dy > det.GetYmax()-0.2) ||
748 (currenttrack1.GetZ()-dz < det.GetZmin()+0.2) ||
749 (currenttrack1.GetZ()+dz > det.GetZmax()-0.2) ) {
750 Float_t maxtgl = TMath::Abs(currenttrack1.GetTgl());
751 if (maxtgl > 1.) maxtgl=1.;
752 dz = TMath::Sqrt(dz*dz+0.5*0.5*maxtgl*maxtgl); //AD
754 Float_t maxsnp = TMath::Abs(currenttrack1.GetSnp());
755 if (maxsnp > AliITSReconstructor::GetRecoParam()->GetMaxSnp()) continue;
756 //if (maxsnp>0.5) maxsnp=0.5;
757 dy = TMath::Sqrt(dy*dy+0.5*0.5*maxsnp*maxsnp); //AD
760 // road in global (rphi,z)
761 Double_t zmin = currenttrack1.GetZ() - dz;
762 Double_t zmax = currenttrack1.GetZ() + dz;
763 Double_t ymin = currenttrack1.GetY() + r*det.GetPhi() - dy;
764 Double_t ymax = currenttrack1.GetY() + r*det.GetPhi() + dy;
766 layer.SelectClusters(zmin,zmax,ymin,ymax);
768 // road for track-cluster association
769 Double_t msz = currenttrack1.GetSigmaZ2() +
770 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
771 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
772 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer);
773 Double_t msy = currenttrack1.GetSigmaY2() +
774 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
775 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
776 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer);
778 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZC();
779 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYC();
781 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZNonC();
782 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYNonC();
784 msz = 1./msz; // 1/RoadZ^2
785 msy = 1./msy; // 1/RoadY^2
788 // loop over all possible prolongations
790 const AliITSRecPoint *c=0; Int_t ci=-1;
791 Double_t chi2=AliITSReconstructor::GetRecoParam()->GetMaxChi2();
793 currenttrack = ¤ttrack1;
794 while ((c=layer.GetNextCluster(ci))!=0) {
795 if (ntracks[ilayer]>95) break; //space for skipped clusters
796 Bool_t change =kFALSE;
797 if (c->GetQ()==0 && (deadzone==1)) continue;
798 Int_t idet=c->GetDetectorIndex();
799 if (currenttrack->GetDetectorIndex()!=idet) { // move track to cluster's detector
800 const AliITSdetector &det=layer.GetDetector(idet);
802 if (!currenttrack2.GetProlongationFast(det.GetPhi(),det.GetR(),y,z)) continue;
803 if ( (z-c->GetZ())*(z-c->GetZ())*msz +
804 (y-c->GetY())*(y-c->GetY())*msy > 1. )
805 continue; // cluster not associated to track
807 new (&backuptrack) AliITStrackMI(currenttrack2);
809 currenttrack =¤ttrack2;
810 if (!currenttrack->Propagate(det.GetPhi(),det.GetR())) {
811 new (currenttrack) AliITStrackMI(backuptrack);
815 currenttrack->SetDetectorIndex(idet);
816 } else { // track already on the cluster's detector
817 if ( (currenttrack->GetZ()-c->GetZ())*(currenttrack->GetZ()-c->GetZ())*msz +
818 (currenttrack->GetY()-c->GetY())*(currenttrack->GetY()-c->GetY())*msy > 1. )
819 continue; // cluster not associated to track
822 chi2 = GetPredictedChi2MI(currenttrack,c,ilayer);
823 if (chi2 < AliITSReconstructor::GetRecoParam()->GetMaxChi2s(ilayer)) {
824 if (c->GetQ()==0) deadzone=1; // take dead zone only once
825 if (ntracks[ilayer]>=100) continue;
826 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
827 updatetrack->SetClIndex(ilayer,0);
829 new (¤ttrack2) AliITStrackMI(backuptrack);
832 if (!UpdateMI(updatetrack,c,chi2,(ilayer<<28)+ci)) continue;
833 updatetrack->SetSampledEdx(c->GetQ(),updatetrack->GetNumberOfClusters()-1); //b.b.
835 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
836 updatetrack->SetDeadZoneProbability(GetDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
838 if (c->IsUsed()) updatetrack->IncrementNUsed();
840 Double_t d=layer.GetThickness(updatetrack->GetY(),updatetrack->GetZ(),x0);
841 updatetrack->CorrectForMaterial(d,x0);
843 updatetrack->SetConstrain(constrain);
845 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
846 Double_t xyz[]={GetX(),GetY(),GetZ()};
847 Double_t ptfactor = 1;//AD
848 Double_t ers[]={GetSigmaX()*ptfactor,GetSigmaY()*ptfactor,GetSigmaZ()};
849 Bool_t isPrim = kTRUE;
851 //updatetrack->fD[0] = updatetrack->GetD(GetX(),GetY());
852 //updatetrack->fD[1] = updatetrack->GetZat(GetX())-GetZ();
853 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
854 if ( TMath::Abs(updatetrack->GetD(0)/(1.+ilayer))>0.4 || TMath::Abs(updatetrack->GetD(1)/(1.+ilayer))>0.4) isPrim=kFALSE; //AD
856 if (isPrim) updatetrack->Improve(d,xyz,ers); //AD
857 } //apply vertex constrain
859 } // create new hypothesy
860 } // loop over possible cluster prolongation
861 // if (constrain&&itrack<2&¤ttrack1.fNSkipped==0 && deadzone==0){
862 if (constrain&&itrack<2&¤ttrack1.GetNSkipped()==0 && deadzone==0&&ntracks[ilayer]<100){
863 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
864 vtrack->SetClIndex(ilayer,0);
866 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
867 Double_t xyz[]={GetX(),GetY(),GetZ()};
868 Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
869 vtrack->Improve(d,xyz,ers);
870 vtrack->IncrementNSkipped();
874 if (constrain&&itrack<1&&TMath::Abs(currenttrack1.GetTgl())>1.1){ //big theta -- for low mult. runs
875 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
876 vtrack->SetClIndex(ilayer,0);
878 Double_t d=GetEffectiveThickness(0,0); //Think of this !!!!
879 Double_t xyz[]={GetX(),GetY(),GetZ()};
880 Double_t ers[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
881 vtrack->Improve(d,xyz,ers);
882 vtrack->SetNDeadZone(vtrack->GetNDeadZone()+1);
887 } //loop over track candidates
893 for (Int_t itrack=0;itrack<ntracks[ilayer];itrack++){
894 normalizedchi2[itrack] = NormalizedChi2(&tracks[ilayer][itrack],ilayer);
895 if ( normalizedchi2[itrack]<3+0.5*ilayer) golds++;//AD
899 if (constrain) { // constrain
900 if (normalizedchi2[itrack]<AliITSReconstructor::GetRecoParam()->GetMaxNormChi2C(ilayer)+1) accepted++;
901 } else { // !constrain
902 if (normalizedchi2[itrack]<AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonC(ilayer)+1) accepted++;
906 TMath::Sort(ntracks[ilayer],normalizedchi2,nindexes[ilayer],kFALSE);
907 ntracks[ilayer] = TMath::Min(accepted,7+2*ilayer);
908 if (ntracks[ilayer]<golds+2+ilayer) ntracks[ilayer]=TMath::Min(golds+2+ilayer,accepted);
909 if (ntracks[ilayer]>90) ntracks[ilayer]=90;
910 } // endloop over layers
911 //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]);
912 Int_t max = constrain ? 20 : 5;
914 for (Int_t i=0; i<TMath::Min(max,ntracks[0]); i++) {
915 AliITStrackMI & track= tracks[0][nindexes[0][i]];
916 if (track.GetNumberOfClusters()<2) continue;
917 if (!constrain&&track.GetNormChi2(0)>7.)continue; //AD
918 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
920 for (Int_t i=0;i<TMath::Min(2,ntracks[1]);i++) {
921 AliITStrackMI & track= tracks[1][nindexes[1][i]];
922 if (track.GetNumberOfClusters()<4) continue;
923 if (!constrain&&track.GetNormChi2(1)>7.)continue; //AD
924 if (constrain) track.IncrementNSkipped();
926 track.SetD(0,track.GetD(GetX(),GetY()));
927 track.SetNSkipped(track.GetNSkipped()+4./(4.+8.*TMath::Abs(track.GetD(0)))); //AD
928 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
929 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
932 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
937 for (Int_t i=0;i<TMath::Min(2,ntracks[2]);i++) {
938 AliITStrackMI & track= tracks[2][nindexes[2][i]];
939 if (track.GetNumberOfClusters()<3) continue;
940 if (!constrain&&track.GetNormChi2(2)>7.)continue; //AD
941 if (constrain) track.SetNSkipped(track.GetNSkipped()+2);
943 track.SetD(0,track.GetD(GetX(),GetY()));
944 track.SetNSkipped(track.GetNSkipped()+7./(7.+8.*TMath::Abs(track.GetD(0)))); //AD
945 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
946 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
949 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
955 // register best tracks - important for V0 finder
957 for (Int_t ilayer=0;ilayer<5;ilayer++){
958 if (ntracks[ilayer]==0) continue;
959 AliITStrackMI & track= tracks[ilayer][nindexes[ilayer][0]];
960 if (track.GetNumberOfClusters()<1) continue;
962 bestarray->AddAt(new AliITStrackMI(track),ilayer);
966 // update TPC V0 information
968 if (otrack->GetESDtrack()->GetV0Index(0)>0){
969 Float_t fprimvertex[3]={GetX(),GetY(),GetZ()};
970 for (Int_t i=0;i<3;i++){
971 Int_t index = otrack->GetESDtrack()->GetV0Index(i);
973 AliV0 *vertex = (AliV0*)fEsd->GetV0(index);
974 if (vertex->GetStatus()<0) continue; // rejected V0
976 if (otrack->GetSign()>0) {
977 vertex->SetIndex(0,esdindex);
980 vertex->SetIndex(1,esdindex);
982 //find nearest layer with track info
983 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
984 Int_t nearestold = GetNearestLayer(xrp); //I.B.
985 Int_t nearest = nearestold;
986 for (Int_t ilayer =nearest;ilayer<8;ilayer++){
987 if (ntracks[nearest]==0){
992 AliITStrackMI & track= tracks[nearest][nindexes[nearest][0]];
993 if (nearestold<5&&nearest<5){
994 Bool_t accept = track.GetNormChi2(nearest)<10;
996 if (track.GetSign()>0) {
997 vertex->SetParamP(track);
998 vertex->Update(fprimvertex);
999 //vertex->SetIndex(0,track.fESDtrack->GetID());
1000 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1002 vertex->SetParamN(track);
1003 vertex->Update(fprimvertex);
1004 //vertex->SetIndex(1,track.fESDtrack->GetID());
1005 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1007 vertex->SetStatus(vertex->GetStatus()+1);
1009 //vertex->SetStatus(-2); // reject V0 - not enough clusters
1012 //if (nearestold>3){
1013 // Int_t indexlayer = (ntracks[0]>0)? 0:1;
1014 // if (ntracks[indexlayer]>0){
1015 // AliITStrackMI & track= tracks[indexlayer][nindexes[indexlayer][0]];
1016 // if (track.GetNumberOfClusters()>4&&track.fNormChi2[indexlayer]<4){
1017 // vertex->SetStatus(-1); // reject V0 - clusters before
1024 //------------------------------------------------------------------------
1025 AliITStrackerMI::AliITSlayer & AliITStrackerMI::GetLayer(Int_t layer) const
1027 //--------------------------------------------------------------------
1030 return fgLayers[layer];
1032 //------------------------------------------------------------------------
1033 AliITStrackerMI::AliITSlayer::AliITSlayer():
1058 //--------------------------------------------------------------------
1059 //default AliITSlayer constructor
1060 //--------------------------------------------------------------------
1061 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
1062 fClusterWeight[i]=0;
1063 fClusterTracks[0][i]=-1;
1064 fClusterTracks[1][i]=-1;
1065 fClusterTracks[2][i]=-1;
1066 fClusterTracks[3][i]=-1;
1069 //------------------------------------------------------------------------
1070 AliITStrackerMI::AliITSlayer::
1071 AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd):
1096 //--------------------------------------------------------------------
1097 //main AliITSlayer constructor
1098 //--------------------------------------------------------------------
1099 fDetectors=new AliITSdetector[fNladders*fNdetectors];
1100 fRoad=2*fR*TMath::Sqrt(3.14/1.);//assuming that there's only one cluster
1102 //------------------------------------------------------------------------
1103 AliITStrackerMI::AliITSlayer::AliITSlayer(const AliITSlayer& layer):
1105 fPhiOffset(layer.fPhiOffset),
1106 fNladders(layer.fNladders),
1107 fZOffset(layer.fZOffset),
1108 fNdetectors(layer.fNdetectors),
1109 fDetectors(layer.fDetectors),
1114 fClustersCs(layer.fClustersCs),
1115 fClusterIndexCs(layer.fClusterIndexCs),
1119 fCurrentSlice(layer.fCurrentSlice),
1126 fAccepted(layer.fAccepted),
1130 //------------------------------------------------------------------------
1131 AliITStrackerMI::AliITSlayer::~AliITSlayer() {
1132 //--------------------------------------------------------------------
1133 // AliITSlayer destructor
1134 //--------------------------------------------------------------------
1135 delete[] fDetectors;
1136 for (Int_t i=0; i<fN; i++) delete fClusters[i];
1137 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
1138 fClusterWeight[i]=0;
1139 fClusterTracks[0][i]=-1;
1140 fClusterTracks[1][i]=-1;
1141 fClusterTracks[2][i]=-1;
1142 fClusterTracks[3][i]=-1;
1145 //------------------------------------------------------------------------
1146 void AliITStrackerMI::AliITSlayer::ResetClusters() {
1147 //--------------------------------------------------------------------
1148 // This function removes loaded clusters
1149 //--------------------------------------------------------------------
1150 for (Int_t i=0; i<fN; i++) delete fClusters[i];
1151 for (Int_t i=0; i<kMaxClusterPerLayer;i++){
1152 fClusterWeight[i]=0;
1153 fClusterTracks[0][i]=-1;
1154 fClusterTracks[1][i]=-1;
1155 fClusterTracks[2][i]=-1;
1156 fClusterTracks[3][i]=-1;
1162 //------------------------------------------------------------------------
1163 void AliITStrackerMI::AliITSlayer::ResetWeights() {
1164 //--------------------------------------------------------------------
1165 // This function reset weights of the clusters
1166 //--------------------------------------------------------------------
1167 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
1168 fClusterWeight[i]=0;
1169 fClusterTracks[0][i]=-1;
1170 fClusterTracks[1][i]=-1;
1171 fClusterTracks[2][i]=-1;
1172 fClusterTracks[3][i]=-1;
1174 for (Int_t i=0; i<fN;i++) {
1175 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster(i);
1176 if (cl&&cl->IsUsed()) cl->Use();
1180 //------------------------------------------------------------------------
1181 void AliITStrackerMI::AliITSlayer::ResetRoad() {
1182 //--------------------------------------------------------------------
1183 // This function calculates the road defined by the cluster density
1184 //--------------------------------------------------------------------
1186 for (Int_t i=0; i<fN; i++) {
1187 if (TMath::Abs(fClusters[i]->GetZ())<fR) n++;
1189 //if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n);
1190 if (n>1) fRoad=2*fR*TMath::Sqrt(3.14/n);
1192 //------------------------------------------------------------------------
1193 Int_t AliITStrackerMI::AliITSlayer::InsertCluster(AliITSRecPoint *c) {
1194 //--------------------------------------------------------------------
1195 //This function adds a cluster to this layer
1196 //--------------------------------------------------------------------
1197 if (fN==kMaxClusterPerLayer) {
1198 ::Error("InsertCluster","Too many clusters !\n");
1204 AliITSdetector &det=GetDetector(c->GetDetectorIndex());
1205 if (c->GetY()<det.GetYmin()) det.SetYmin(c->GetY());
1206 if (c->GetY()>det.GetYmax()) det.SetYmax(c->GetY());
1207 if (c->GetZ()<det.GetZmin()) det.SetZmin(c->GetZ());
1208 if (c->GetZ()>det.GetZmax()) det.SetZmax(c->GetZ());
1212 //------------------------------------------------------------------------
1213 void AliITStrackerMI::AliITSlayer::SortClusters()
1218 AliITSRecPoint **clusters = new AliITSRecPoint*[fN];
1219 Float_t *z = new Float_t[fN];
1220 Int_t * index = new Int_t[fN];
1222 for (Int_t i=0;i<fN;i++){
1223 z[i] = fClusters[i]->GetZ();
1225 TMath::Sort(fN,z,index,kFALSE);
1226 for (Int_t i=0;i<fN;i++){
1227 clusters[i] = fClusters[index[i]];
1230 for (Int_t i=0;i<fN;i++){
1231 fClusters[i] = clusters[i];
1232 fZ[i] = fClusters[i]->GetZ();
1233 AliITSdetector &det=GetDetector(fClusters[i]->GetDetectorIndex());
1234 Double_t y=fR*det.GetPhi() + fClusters[i]->GetY();
1235 if (y>2.*fR*TMath::Pi()) y -= 2.*fR*TMath::Pi();
1245 for (Int_t i=0;i<fN;i++){
1246 if (fY[i]<fYB[0]) fYB[0]=fY[i];
1247 if (fY[i]>fYB[1]) fYB[1]=fY[i];
1248 fClusterIndex[i] = i;
1252 fDy5 = (fYB[1]-fYB[0])/5.;
1253 fDy10 = (fYB[1]-fYB[0])/10.;
1254 fDy20 = (fYB[1]-fYB[0])/20.;
1255 for (Int_t i=0;i<6;i++) fN5[i] =0;
1256 for (Int_t i=0;i<11;i++) fN10[i]=0;
1257 for (Int_t i=0;i<21;i++) fN20[i]=0;
1259 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;}
1260 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;}
1261 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;}
1264 for (Int_t i=0;i<fN;i++)
1265 for (Int_t irot=-1;irot<=1;irot++){
1266 Float_t curY = fY[i]+irot*TMath::TwoPi()*fR;
1268 for (Int_t slice=0; slice<6;slice++){
1269 if (fBy5[slice][0]<curY && curY<fBy5[slice][1]&&fN5[slice]<kMaxClusterPerLayer5){
1270 fClusters5[slice][fN5[slice]] = fClusters[i];
1271 fY5[slice][fN5[slice]] = curY;
1272 fZ5[slice][fN5[slice]] = fZ[i];
1273 fClusterIndex5[slice][fN5[slice]]=i;
1278 for (Int_t slice=0; slice<11;slice++){
1279 if (fBy10[slice][0]<curY && curY<fBy10[slice][1]&&fN10[slice]<kMaxClusterPerLayer10){
1280 fClusters10[slice][fN10[slice]] = fClusters[i];
1281 fY10[slice][fN10[slice]] = curY;
1282 fZ10[slice][fN10[slice]] = fZ[i];
1283 fClusterIndex10[slice][fN10[slice]]=i;
1288 for (Int_t slice=0; slice<21;slice++){
1289 if (fBy20[slice][0]<curY && curY<fBy20[slice][1]&&fN20[slice]<kMaxClusterPerLayer20){
1290 fClusters20[slice][fN20[slice]] = fClusters[i];
1291 fY20[slice][fN20[slice]] = curY;
1292 fZ20[slice][fN20[slice]] = fZ[i];
1293 fClusterIndex20[slice][fN20[slice]]=i;
1300 // consistency check
1302 for (Int_t i=0;i<fN-1;i++){
1308 for (Int_t slice=0;slice<21;slice++)
1309 for (Int_t i=0;i<fN20[slice]-1;i++){
1310 if (fZ20[slice][i]>fZ20[slice][i+1]){
1317 //------------------------------------------------------------------------
1318 Int_t AliITStrackerMI::AliITSlayer::FindClusterIndex(Float_t z) const {
1319 //--------------------------------------------------------------------
1320 // This function returns the index of the nearest cluster
1321 //--------------------------------------------------------------------
1324 if (fCurrentSlice<0) {
1333 if (ncl==0) return 0;
1334 Int_t b=0, e=ncl-1, m=(b+e)/2;
1335 for (; b<e; m=(b+e)/2) {
1336 // if (z > fClusters[m]->GetZ()) b=m+1;
1337 if (z > zcl[m]) b=m+1;
1342 //------------------------------------------------------------------------
1343 void AliITStrackerMI::AliITSlayer::
1344 SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1345 //--------------------------------------------------------------------
1346 // This function sets the "window"
1347 //--------------------------------------------------------------------
1349 Double_t circle=2*TMath::Pi()*fR;
1350 fYmin = ymin; fYmax =ymax;
1351 Float_t ymiddle = (fYmin+fYmax)*0.5;
1352 if (ymiddle<fYB[0]) {fYmin+=circle; fYmax+=circle;ymiddle+=circle;}
1354 if (ymiddle>fYB[1]) {fYmin-=circle; fYmax-=circle;ymiddle-=circle;}
1359 fClustersCs = fClusters;
1360 fClusterIndexCs = fClusterIndex;
1366 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy20){
1367 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy20);
1368 if (slice<0) slice=0;
1369 if (slice>20) slice=20;
1370 Bool_t isOK = (fYmin>fBy20[slice][0]&&fYmax<fBy20[slice][1]);
1372 fCurrentSlice=slice;
1373 fClustersCs = fClusters20[fCurrentSlice];
1374 fClusterIndexCs = fClusterIndex20[fCurrentSlice];
1375 fYcs = fY20[fCurrentSlice];
1376 fZcs = fZ20[fCurrentSlice];
1377 fNcs = fN20[fCurrentSlice];
1382 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy10){
1383 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy10);
1384 if (slice<0) slice=0;
1385 if (slice>10) slice=10;
1386 Bool_t isOK = (fYmin>fBy10[slice][0]&&fYmax<fBy10[slice][1]);
1388 fCurrentSlice=slice;
1389 fClustersCs = fClusters10[fCurrentSlice];
1390 fClusterIndexCs = fClusterIndex10[fCurrentSlice];
1391 fYcs = fY10[fCurrentSlice];
1392 fZcs = fZ10[fCurrentSlice];
1393 fNcs = fN10[fCurrentSlice];
1398 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy5){
1399 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy5);
1400 if (slice<0) slice=0;
1401 if (slice>5) slice=5;
1402 Bool_t isOK = (fYmin>fBy5[slice][0]&&fYmax<fBy5[slice][1]);
1404 fCurrentSlice=slice;
1405 fClustersCs = fClusters5[fCurrentSlice];
1406 fClusterIndexCs = fClusterIndex5[fCurrentSlice];
1407 fYcs = fY5[fCurrentSlice];
1408 fZcs = fZ5[fCurrentSlice];
1409 fNcs = fN5[fCurrentSlice];
1413 fI=FindClusterIndex(zmin); fZmax=zmax;
1414 fImax = TMath::Min(FindClusterIndex(zmax)+1,fNcs);
1418 //------------------------------------------------------------------------
1419 Int_t AliITStrackerMI::AliITSlayer::
1420 FindDetectorIndex(Double_t phi, Double_t z) const {
1421 //--------------------------------------------------------------------
1422 //This function finds the detector crossed by the track
1423 //--------------------------------------------------------------------
1425 if (fZOffset<0) // old geometry
1426 dphi = -(phi-fPhiOffset);
1427 else // new geometry
1428 dphi = phi-fPhiOffset;
1430 if (dphi < 0) dphi += 2*TMath::Pi();
1431 else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi();
1432 Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5);
1433 if (np>=fNladders) np-=fNladders;
1434 if (np<0) np+=fNladders;
1436 Double_t dz=fZOffset-z;
1437 Int_t nz=Int_t(dz*(fNdetectors-1)*0.5/fZOffset+0.5);
1438 if (nz>=fNdetectors) return -1;
1439 if (nz<0) return -1;
1441 return np*fNdetectors + nz;
1443 //------------------------------------------------------------------------
1444 const AliITSRecPoint *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci){
1445 //--------------------------------------------------------------------
1446 // This function returns clusters within the "window"
1447 //--------------------------------------------------------------------
1449 if (fCurrentSlice<0){
1450 Double_t rpi2 = 2.*fR*TMath::Pi();
1451 for (Int_t i=fI; i<fImax; i++) {
1453 if (fYmax<y) y -= rpi2;
1454 if (fYmin>y) y += rpi2;
1455 if (y<fYmin) continue;
1456 if (y>fYmax) continue;
1457 if (fClusters[i]->GetQ()==0&&fSkip==2) continue;
1460 return fClusters[i];
1464 for (Int_t i=fI; i<fImax; i++) {
1465 if (fYcs[i]<fYmin) continue;
1466 if (fYcs[i]>fYmax) continue;
1467 if (fClustersCs[i]->GetQ()==0&&fSkip==2) continue;
1468 ci=fClusterIndexCs[i];
1470 return fClustersCs[i];
1475 //------------------------------------------------------------------------
1476 Double_t AliITStrackerMI::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0)
1478 //--------------------------------------------------------------------
1479 //This function returns the layer thickness at this point (units X0)
1480 //--------------------------------------------------------------------
1483 if (43<fR&&fR<45) { //SSD2
1486 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1487 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1488 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1489 for (Int_t i=0; i<12; i++) {
1490 if (TMath::Abs(z-3.9*(i+0.5))<0.15) {
1491 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1495 if (TMath::Abs(z+3.9*(i+0.5))<0.15) {
1496 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1500 if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1501 if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1504 if (37<fR&&fR<41) { //SSD1
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<11; i++) {
1511 if (TMath::Abs(z-3.9*i)<0.15) {
1512 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1516 if (TMath::Abs(z+3.9*i)<0.15) {
1517 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1521 if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1522 if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1525 if (13<fR&&fR<26) { //SDD
1528 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1530 if (TMath::Abs(y-1.80)<0.55) {
1532 for (Int_t j=0; j<20; j++) {
1533 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1534 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1537 if (TMath::Abs(y+1.80)<0.55) {
1539 for (Int_t j=0; j<20; j++) {
1540 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1541 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1545 for (Int_t i=0; i<4; i++) {
1546 if (TMath::Abs(z-7.3*i)<0.60) {
1548 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1551 if (TMath::Abs(z+7.3*i)<0.60) {
1553 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1558 if (6<fR&&fR<8) { //SPD2
1559 Double_t dd=0.0063; x0=21.5;
1561 if (TMath::Abs(y-3.08)>0.5) d+=dd;
1562 //if (TMath::Abs(y-3.08)>0.45) d+=dd;
1563 if (TMath::Abs(y-3.03)<0.10) {d+=0.014;}
1565 if (3<fR&&fR<5) { //SPD1
1566 Double_t dd=0.0063; x0=21.5;
1568 if (TMath::Abs(y+0.21)>0.6) d+=dd;
1569 //if (TMath::Abs(y+0.21)>0.45) d+=dd;
1570 if (TMath::Abs(y+0.10)<0.10) {d+=0.014;}
1575 //------------------------------------------------------------------------
1576 Double_t AliITStrackerMI::GetEffectiveThickness(Double_t y,Double_t z) const
1578 //--------------------------------------------------------------------
1579 //Returns the thickness between the current layer and the vertex (units X0)
1580 //--------------------------------------------------------------------
1581 Double_t d=0.0028*3*3; //beam pipe
1584 Double_t xn=fgLayers[fI].GetR();
1585 for (Int_t i=0; i<fI; i++) {
1586 Double_t xi=fgLayers[i].GetR();
1587 d+=fgLayers[i].GetThickness(y,z,x0)*xi*xi;
1596 Double_t xi=0.5*(fgLayers[3].GetR()+fgLayers[4].GetR());
1602 //------------------------------------------------------------------------
1603 Int_t AliITStrackerMI::AliITSlayer::InRoad() const {
1604 //--------------------------------------------------------------------
1605 // This function returns number of clusters within the "window"
1606 //--------------------------------------------------------------------
1608 for (Int_t i=fI; i<fN; i++) {
1609 const AliITSRecPoint *c=fClusters[i];
1610 if (c->GetZ() > fZmax) break;
1611 if (c->IsUsed()) continue;
1612 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
1613 Double_t y=fR*det.GetPhi() + c->GetY();
1615 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
1616 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
1618 if (y<fYmin) continue;
1619 if (y>fYmax) continue;
1624 //------------------------------------------------------------------------
1625 Bool_t AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *t,
1626 const AliITStrackMI *c, Bool_t extra) {
1627 //--------------------------------------------------------------------
1628 // This function refits the track "t" at the position "x" using
1629 // the clusters from "c"
1630 // If "extra"==kTRUE,
1631 // the clusters from overlapped modules get attached to "t"
1632 //--------------------------------------------------------------------
1633 Int_t index[kMaxLayer];
1635 for (k=0; k<kMaxLayer; k++) index[k]=-1;
1636 Int_t nc=c->GetNumberOfClusters();
1637 for (k=0; k<nc; k++) {
1638 Int_t idx=c->GetClusterIndex(k),nl=(idx&0xf0000000)>>28;
1642 Int_t from, to, step;
1643 if (xx > t->GetX()) {
1644 from=0; to=kMaxLayer;
1647 from=kMaxLayer-1; to=-1;
1651 for (Int_t i=from; i != to; i += step) {
1652 AliITSlayer &layer=fgLayers[i];
1653 Double_t r=layer.GetR();
1656 Double_t hI=i-0.5*step;
1657 if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) {
1658 Double_t rs=0.5*(fgLayers[i-step].GetR() + r);
1659 Double_t d=0.0034, x0=38.6;
1660 if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;}
1661 if (!t->PropagateTo(rs,-step*d,x0)) {
1667 // remember old position [SR, GSI 18.02.2003]
1668 Double_t oldX=0., oldY=0., oldZ=0.;
1669 if (t->IsStartedTimeIntegral() && step==1) {
1670 t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ);
1675 if (!t->GetPhiZat(r,phi,z)) return kFALSE;
1677 Int_t idet=layer.FindDetectorIndex(phi,z);
1682 const AliITSdetector &det=layer.GetDetector(idet);
1684 if (!t->Propagate(phi,det.GetR())) {
1687 t->SetDetectorIndex(idet);
1689 const AliITSRecPoint *cl=0;
1690 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
1694 const AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(idx);
1696 if (idet != c->GetDetectorIndex()) {
1697 idet=c->GetDetectorIndex();
1698 const AliITSdetector &det=layer.GetDetector(idet);
1699 if (!t->Propagate(det.GetPhi(),det.GetR())) {
1702 t->SetDetectorIndex(idet);
1704 //Double_t chi2=t->GetPredictedChi2(c);
1705 Int_t layer = (idx & 0xf0000000) >> 28;;
1706 Double_t chi2=GetPredictedChi2MI(t,c,layer);
1717 //if (!t->Update(cl,maxchi2,idx)) {
1718 if (!UpdateMI(t,cl,maxchi2,idx)) {
1721 t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
1726 Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0);
1727 t->CorrectForMaterial(-step*d,x0);
1730 if (extra) { //search for extra clusters
1731 AliITStrackV2 tmp(*t);
1732 Double_t dz=4*TMath::Sqrt(tmp.GetSigmaZ2()+AliITSReconstructor::GetRecoParam()->GetSigmaZ2(i));
1733 if (dz < 0.5*TMath::Abs(tmp.GetTgl())) dz=0.5*TMath::Abs(tmp.GetTgl());
1734 Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+AliITSReconstructor::GetRecoParam()->GetSigmaY2(i));
1735 if (dy < 0.5*TMath::Abs(tmp.GetSnp())) dy=0.5*TMath::Abs(tmp.GetSnp());
1736 Double_t zmin=t->GetZ() - dz;
1737 Double_t zmax=t->GetZ() + dz;
1738 Double_t ymin=t->GetY() + phi*r - dy;
1739 Double_t ymax=t->GetY() + phi*r + dy;
1740 layer.SelectClusters(zmin,zmax,ymin,ymax);
1742 const AliITSRecPoint *c=0; Int_t ci=-1,cci=-1;
1743 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2(), tolerance=0.1;
1744 while ((c=layer.GetNextCluster(ci))!=0) {
1745 if (idet == c->GetDetectorIndex()) continue;
1747 const AliITSdetector &det=layer.GetDetector(c->GetDetectorIndex());
1749 if (!tmp.Propagate(det.GetPhi(),det.GetR())) continue;
1751 if (TMath::Abs(tmp.GetZ() - c->GetZ()) > tolerance) continue;
1752 if (TMath::Abs(tmp.GetY() - c->GetY()) > tolerance) continue;
1754 Double_t chi2=tmp.GetPredictedChi2(c);
1755 if (chi2<maxchi2) { maxchi2=chi2; cci=ci; }
1757 if (cci>=0) t->SetExtraCluster(i,(i<<28)+cci);
1760 // track time update [SR, GSI 17.02.2003]
1761 if (t->IsStartedTimeIntegral() && step==1) {
1762 Double_t newX, newY, newZ;
1763 t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
1764 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
1765 (oldZ-newZ)*(oldZ-newZ);
1766 t->AddTimeStep(TMath::Sqrt(dL2));
1772 if (!t->PropagateTo(xx,0.,0.)) return kFALSE;
1775 //------------------------------------------------------------------------
1777 AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *t,const Int_t *clindex) {
1778 //--------------------------------------------------------------------
1779 // This function refits the track "t" at the position "x" using
1780 // the clusters from array
1781 //--------------------------------------------------------------------
1782 Int_t index[kMaxLayer];
1784 for (k=0; k<kMaxLayer; k++) index[k]=-1;
1786 for (k=0; k<kMaxLayer; k++) {
1787 index[k]=clindex[k];
1790 Int_t from, to, step;
1791 if (xx > t->GetX()) {
1792 from=0; to=kMaxLayer;
1795 from=kMaxLayer-1; to=-1;
1799 for (Int_t i=from; i != to; i += step) {
1800 AliITSlayer &layer=fgLayers[i];
1801 Double_t r=layer.GetR();
1802 if (step<0 && xx>r) break; //
1804 Double_t hI=i-0.5*step;
1805 if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) {
1806 Double_t rs=0.5*(fgLayers[i-step].GetR() + r);
1807 Double_t d=0.0034, x0=38.6;
1808 if (TMath::Abs(hI-1.5)<0.01) {rs=9.; d=0.0097; x0=42;}
1809 if (!t->PropagateTo(rs,-step*d,x0)) {
1815 // remember old position [SR, GSI 18.02.2003]
1816 Double_t oldX=0., oldY=0., oldZ=0.;
1817 if (t->IsStartedTimeIntegral() && step==1) {
1818 t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ);
1822 if (!t->GetPhiZat(r,phi,z)) return kFALSE;
1824 Int_t idet=layer.FindDetectorIndex(phi,z);
1828 const AliITSdetector &det=layer.GetDetector(idet);
1830 if (!t->Propagate(phi,det.GetR())) {
1833 t->SetDetectorIndex(idet);
1835 const AliITSRecPoint *cl=0;
1836 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
1840 const AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(idx);
1842 if (idet != c->GetDetectorIndex()) {
1843 idet=c->GetDetectorIndex();
1844 const AliITSdetector &det=layer.GetDetector(idet);
1845 if (!t->Propagate(det.GetPhi(),det.GetR())) {
1848 t->SetDetectorIndex(idet);
1850 //Double_t chi2=t->GetPredictedChi2(c);
1851 Int_t layer = (idx & 0xf0000000) >> 28;;
1852 Double_t chi2=GetPredictedChi2MI(t,c,layer);
1863 if (t->GetNumberOfClusters()>2) {
1864 Double_t dz=4*TMath::Sqrt(t->GetSigmaZ2()+AliITSReconstructor::GetRecoParam()->GetSigmaZ2(i));
1865 Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+AliITSReconstructor::GetRecoParam()->GetSigmaY2(i));
1866 Double_t zmin=t->GetZ() - dz;
1867 Double_t zmax=t->GetZ() + dz;
1868 Double_t ymin=t->GetY() + phi*r - dy;
1869 Double_t ymax=t->GetY() + phi*r + dy;
1870 layer.SelectClusters(zmin,zmax,ymin,ymax);
1872 const AliITSRecPoint *c=0; Int_t ci=-1;
1873 while ((c=layer.GetNextCluster(ci))!=0) {
1874 if (idet != c->GetDetectorIndex()) continue;
1875 Double_t chi2=t->GetPredictedChi2(c);
1876 if (chi2<maxchi2) { cl=c; maxchi2=chi2; idx=ci; }
1881 //if (!t->Update(cl,maxchi2,idx)) {
1882 if (!UpdateMI(t,cl,maxchi2,idx)) {
1885 t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
1890 Double_t d=layer.GetThickness(t->GetY(),t->GetZ(),x0);
1891 t->CorrectForMaterial(-step*d,x0);
1894 // track time update [SR, GSI 17.02.2003]
1895 if (t->IsStartedTimeIntegral() && step==1) {
1896 Double_t newX, newY, newZ;
1897 t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
1898 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
1899 (oldZ-newZ)*(oldZ-newZ);
1900 t->AddTimeStep(TMath::Sqrt(dL2));
1906 if (!t->PropagateTo(xx,0.,0.)) return kFALSE;
1909 //------------------------------------------------------------------------
1910 Double_t AliITStrackerMI::GetNormalizedChi2(AliITStrackMI * track, Int_t mode)
1913 // calculate normalized chi2
1914 // return NormalizedChi2(track,0);
1917 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
1918 // track->fdEdxMismatch=0;
1919 Float_t dedxmismatch =0;
1920 Float_t *ny = GetNy(fCurrentEsdTrack), *nz = GetNz(fCurrentEsdTrack);
1922 for (Int_t i = 0;i<6;i++){
1923 if (track->GetClIndex(i)>0){
1924 Float_t cerry, cerrz;
1925 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1927 { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
1930 Float_t cchi2 = (track->GetDy(i)*track->GetDy(i)/cerry)+(track->GetDz(i)*track->GetDz(i)/cerrz);
1932 Float_t ratio = track->GetNormQ(i)/track->GetExpQ();
1934 cchi2+=(0.5-ratio)*10.;
1935 //track->fdEdxMismatch+=(0.5-ratio)*10.;
1936 dedxmismatch+=(0.5-ratio)*10.;
1940 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster( track->GetClIndex(i));
1941 Double_t delta = cl->GetNy()+cl->GetNz()-ny[i]-nz[i];
1942 if (delta>1) chi2 +=0.5*TMath::Min(delta/2,2.);
1943 if (i<2) chi2+=2*cl->GetDeltaProbability();
1949 if (TMath::Abs(track->GetdEdxMismatch()-dedxmismatch)>0.0001){
1950 track->SetdEdxMismatch(dedxmismatch);
1954 for (Int_t i = 0;i<4;i++){
1955 if (track->GetClIndex(i)>0){
1956 Float_t cerry, cerrz;
1957 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1958 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
1961 chi2+= (track->GetDy(i)*track->GetDy(i)/cerry);
1962 chi2+= (track->GetDz(i)*track->GetDz(i)/cerrz);
1966 for (Int_t i = 4;i<6;i++){
1967 if (track->GetClIndex(i)>0){
1968 Float_t cerry, cerrz;
1969 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
1970 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
1973 Float_t cerryb, cerrzb;
1974 if (ny[i+6]>0) {cerryb = erry[i+6]; cerrzb=errz[i+6];}
1975 else { cerryb= track->GetSigmaY(i+6); cerrzb = track->GetSigmaZ(i+6);}
1978 chi2+= TMath::Min((track->GetDy(i+6)*track->GetDy(i+6)/cerryb),track->GetDy(i)*track->GetDy(i)/cerry);
1979 chi2+= TMath::Min((track->GetDz(i+6)*track->GetDz(i+6)/cerrzb),track->GetDz(i)*track->GetDz(i)/cerrz);
1984 if (track->GetESDtrack()->GetTPCsignal()>85){
1985 Float_t ratio = track->GetdEdx()/track->GetESDtrack()->GetTPCsignal();
1987 chi2+=(0.5-ratio)*5.;
1990 chi2+=(ratio-2.0)*3;
1994 Double_t match = TMath::Sqrt(track->GetChi22());
1995 if (track->GetConstrain()) match/=track->GetNumberOfClusters();
1996 if (!track->GetConstrain()) match/=track->GetNumberOfClusters()-2.;
1997 if (match<0) match=0;
1998 Float_t deadzonefactor = (track->GetNDeadZone()>0) ? 3*(1.1-track->GetDeadZoneProbability()):0.;
1999 Double_t normchi2 = 2*track->GetNSkipped()+match+deadzonefactor+(1+(2*track->GetNSkipped()+deadzonefactor)/track->GetNumberOfClusters())*
2000 (chi2)/TMath::Max(double(sum-track->GetNSkipped()),
2001 1./(1.+track->GetNSkipped()));
2005 //------------------------------------------------------------------------
2006 Double_t AliITStrackerMI::GetMatchingChi2(AliITStrackMI * track1, AliITStrackMI * track2)
2009 // return matching chi2 between two tracks
2010 AliITStrackMI track3(*track2);
2011 track3.Propagate(track1->GetAlpha(),track1->GetX());
2013 vec(0,0)=track1->GetY() - track3.GetY();
2014 vec(1,0)=track1->GetZ() - track3.GetZ();
2015 vec(2,0)=track1->GetSnp() - track3.GetSnp();
2016 vec(3,0)=track1->GetTgl() - track3.GetTgl();
2017 vec(4,0)=track1->Get1Pt() - track3.Get1Pt();
2020 cov(0,0) = track1->GetSigmaY2()+track3.GetSigmaY2();
2021 cov(1,1) = track1->GetSigmaZ2()+track3.GetSigmaZ2();
2022 cov(2,2) = track1->GetSigmaSnp2()+track3.GetSigmaSnp2();
2023 cov(3,3) = track1->GetSigmaTgl2()+track3.GetSigmaTgl2();
2024 cov(4,4) = track1->GetSigma1Pt2()+track3.GetSigma1Pt2();
2026 cov(0,1)=cov(1,0) = track1->GetSigmaZY()+track3.GetSigmaZY();
2027 cov(0,2)=cov(2,0) = track1->GetSigmaSnpY()+track3.GetSigmaSnpY();
2028 cov(0,3)=cov(3,0) = track1->GetSigmaTglY()+track3.GetSigmaTglY();
2029 cov(0,4)=cov(4,0) = track1->GetSigma1PtY()+track3.GetSigma1PtY();
2031 cov(1,2)=cov(2,1) = track1->GetSigmaSnpZ()+track3.GetSigmaSnpZ();
2032 cov(1,3)=cov(3,1) = track1->GetSigmaTglZ()+track3.GetSigmaTglZ();
2033 cov(1,4)=cov(4,1) = track1->GetSigma1PtZ()+track3.GetSigma1PtZ();
2035 cov(2,3)=cov(3,2) = track1->GetSigmaTglSnp()+track3.GetSigmaTglSnp();
2036 cov(2,4)=cov(4,2) = track1->GetSigma1PtSnp()+track3.GetSigma1PtSnp();
2038 cov(3,4)=cov(4,3) = track1->GetSigma1PtTgl()+track3.GetSigma1PtTgl();
2041 TMatrixD vec2(cov,TMatrixD::kMult,vec);
2042 TMatrixD chi2(vec2,TMatrixD::kTransposeMult,vec);
2045 //------------------------------------------------------------------------
2046 Double_t AliITStrackerMI::GetDeadZoneProbability(Double_t zpos, Double_t zerr)
2049 // return probability that given point - characterized by z position and error is in dead zone
2051 Double_t probability =0;
2052 Double_t absz = TMath::Abs(zpos);
2053 Double_t nearestz = (absz<2)? 0.:7.1;
2054 if (TMath::Abs(absz-nearestz)>0.25+3*zerr) return 0;
2055 Double_t zmin=0, zmax=0;
2057 zmin = -7.25; zmax = -6.95;
2060 zmin = 7.0; zmax =7.3;
2063 zmin = -0.75; zmax = 1.5;
2065 probability = (TMath::Erf((zpos-zmin)/zerr) - TMath::Erf((zpos-zmax)/zerr))*0.5;
2068 //------------------------------------------------------------------------
2069 Double_t AliITStrackerMI::GetTruncatedChi2(AliITStrackMI * track, Float_t fac)
2072 // calculate normalized chi2
2074 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2076 for (Int_t i = 0;i<6;i++){
2077 if (TMath::Abs(track->GetDy(i))>0){
2078 chi2[i]= (track->GetDy(i)/erry[i])*(track->GetDy(i)/erry[i]);
2079 chi2[i]+= (track->GetDz(i)/errz[i])*(track->GetDz(i)/errz[i]);
2082 else{chi2[i]=10000;}
2085 TMath::Sort(6,chi2,index,kFALSE);
2086 Float_t max = float(ncl)*fac-1.;
2087 Float_t sumchi=0, sumweight=0;
2088 for (Int_t i=0;i<max+1;i++){
2089 Float_t weight = (i<max)?1.:(max+1.-i);
2090 sumchi+=weight*chi2[index[i]];
2093 Double_t normchi2 = sumchi/sumweight;
2096 //------------------------------------------------------------------------
2097 Double_t AliITStrackerMI::GetInterpolatedChi2(AliITStrackMI * forwardtrack, AliITStrackMI * backtrack)
2100 // calculate normalized chi2
2101 // if (forwardtrack->fNUsed>0.3*float(forwardtrack->GetNumberOfClusters())) return 10000;
2104 for (Int_t i=0;i<6;i++){
2105 if ( (backtrack->GetSigmaY(i)<0.000000001) || (forwardtrack->GetSigmaY(i)<0.000000001)) continue;
2106 Double_t sy1 = forwardtrack->GetSigmaY(i);
2107 Double_t sz1 = forwardtrack->GetSigmaZ(i);
2108 Double_t sy2 = backtrack->GetSigmaY(i);
2109 Double_t sz2 = backtrack->GetSigmaZ(i);
2110 if (i<2){ sy2=1000.;sz2=1000;}
2112 Double_t dy0 = (forwardtrack->GetDy(i)/(sy1*sy1) +backtrack->GetDy(i)/(sy2*sy2))/(1./(sy1*sy1)+1./(sy2*sy2));
2113 Double_t dz0 = (forwardtrack->GetDz(i)/(sz1*sz1) +backtrack->GetDz(i)/(sz2*sz2))/(1./(sz1*sz1)+1./(sz2*sz2));
2115 Double_t nz0 = dz0*TMath::Sqrt((1./(sz1*sz1)+1./(sz2*sz2)));
2116 Double_t ny0 = dy0*TMath::Sqrt((1./(sy1*sy1)+1./(sy2*sy2)));
2118 res+= nz0*nz0+ny0*ny0;
2121 if (npoints>1) return
2122 TMath::Max(TMath::Abs(0.3*forwardtrack->Get1Pt())-0.5,0.)+
2123 //2*forwardtrack->fNUsed+
2124 res/TMath::Max(double(npoints-forwardtrack->GetNSkipped()),
2125 1./(1.+forwardtrack->GetNSkipped()));
2128 //------------------------------------------------------------------------
2129 Float_t *AliITStrackerMI::GetWeight(Int_t index) {
2130 //--------------------------------------------------------------------
2131 // Return pointer to a given cluster
2132 //--------------------------------------------------------------------
2133 Int_t l=(index & 0xf0000000) >> 28;
2134 Int_t c=(index & 0x0fffffff) >> 00;
2135 return fgLayers[l].GetWeight(c);
2137 //------------------------------------------------------------------------
2138 void AliITStrackerMI::RegisterClusterTracks(AliITStrackMI* track,Int_t id)
2140 //---------------------------------------------
2141 // register track to the list
2143 if (track->GetESDtrack()->GetKinkIndex(0)!=0) return; //don't register kink tracks
2146 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2147 Int_t index = track->GetClusterIndex(icluster);
2148 Int_t l=(index & 0xf0000000) >> 28;
2149 Int_t c=(index & 0x0fffffff) >> 00;
2150 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2151 for (Int_t itrack=0;itrack<4;itrack++){
2152 if (fgLayers[l].GetClusterTracks(itrack,c)<0){
2153 fgLayers[l].SetClusterTracks(itrack,c,id);
2159 //------------------------------------------------------------------------
2160 void AliITStrackerMI::UnRegisterClusterTracks(AliITStrackMI* track, Int_t id)
2162 //---------------------------------------------
2163 // unregister track from the list
2164 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2165 Int_t index = track->GetClusterIndex(icluster);
2166 Int_t l=(index & 0xf0000000) >> 28;
2167 Int_t c=(index & 0x0fffffff) >> 00;
2168 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2169 for (Int_t itrack=0;itrack<4;itrack++){
2170 if (fgLayers[l].GetClusterTracks(itrack,c)==id){
2171 fgLayers[l].SetClusterTracks(itrack,c,-1);
2176 //------------------------------------------------------------------------
2177 Float_t AliITStrackerMI::GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSRecPoint *clist[6])
2179 //-------------------------------------------------------------
2180 //get number of shared clusters
2181 //-------------------------------------------------------------
2183 for (Int_t i=0;i<6;i++) { list[i]=-1, clist[i]=0;}
2184 // mean number of clusters
2185 Float_t *ny = GetNy(id), *nz = GetNz(id);
2188 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2189 Int_t index = track->GetClusterIndex(icluster);
2190 Int_t l=(index & 0xf0000000) >> 28;
2191 Int_t c=(index & 0x0fffffff) >> 00;
2192 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2194 printf("problem\n");
2196 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2200 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
2201 if (l>2&&track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
2203 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2206 deltan = (cl->GetNz()-nz[l]);
2208 if (deltan>2.0) continue; // extended - highly probable shared cluster
2209 weight = 2./TMath::Max(3.+deltan,2.);
2211 for (Int_t itrack=0;itrack<4;itrack++){
2212 if (fgLayers[l].GetClusterTracks(itrack,c)>=0 && fgLayers[l].GetClusterTracks(itrack,c)!=id){
2214 clist[l] = (AliITSRecPoint*)GetCluster(index);
2220 track->SetNUsed(shared);
2223 //------------------------------------------------------------------------
2224 Int_t AliITStrackerMI::GetOverlapTrack(AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6],Int_t overlist[6])
2227 // find first shared track
2229 // mean number of clusters
2230 Float_t *ny = GetNy(trackID), *nz = GetNz(trackID);
2232 for (Int_t i=0;i<6;i++) overlist[i]=-1;
2233 Int_t sharedtrack=100000;
2234 Int_t tracks[24],trackindex=0;
2235 for (Int_t i=0;i<24;i++) {tracks[i]=-1;}
2237 for (Int_t icluster=0;icluster<6;icluster++){
2238 if (clusterlist[icluster]<0) continue;
2239 Int_t index = clusterlist[icluster];
2240 Int_t l=(index & 0xf0000000) >> 28;
2241 Int_t c=(index & 0x0fffffff) >> 00;
2243 printf("problem\n");
2245 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2246 //if (l>3) continue;
2247 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2250 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
2251 if (l>2&&track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
2253 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2256 deltan = (cl->GetNz()-nz[l]);
2258 if (deltan>2.0) continue; // extended - highly probable shared cluster
2260 for (Int_t itrack=3;itrack>=0;itrack--){
2261 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2262 if (fgLayers[l].GetClusterTracks(itrack,c)!=trackID){
2263 tracks[trackindex] = fgLayers[l].GetClusterTracks(itrack,c);
2268 if (trackindex==0) return -1;
2270 sharedtrack = tracks[0];
2272 if (trackindex==2) sharedtrack =TMath::Min(tracks[0],tracks[1]);
2275 Int_t track[24], cluster[24];
2276 for (Int_t i=0;i<trackindex;i++){ track[i]=-1; cluster[i]=0;}
2279 for (Int_t i=0;i<trackindex;i++){
2280 if (tracks[i]<0) continue;
2281 track[index] = tracks[i];
2283 for (Int_t j=i+1;j<trackindex;j++){
2284 if (tracks[j]<0) continue;
2285 if (tracks[j]==tracks[i]){
2293 for (Int_t i=0;i<index;i++){
2294 if (cluster[index]>max) {
2295 sharedtrack=track[index];
2302 if (sharedtrack>=100000) return -1;
2304 // make list of overlaps
2306 for (Int_t icluster=0;icluster<6;icluster++){
2307 if (clusterlist[icluster]<0) continue;
2308 Int_t index = clusterlist[icluster];
2309 Int_t l=(index & 0xf0000000) >> 28;
2310 Int_t c=(index & 0x0fffffff) >> 00;
2311 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2312 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2314 if (cl->GetNy()>2) continue;
2315 if (cl->GetNz()>2) continue;
2318 if (cl->GetNy()>3) continue;
2319 if (cl->GetNz()>3) continue;
2322 for (Int_t itrack=3;itrack>=0;itrack--){
2323 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2324 if (fgLayers[l].GetClusterTracks(itrack,c)==sharedtrack){
2332 //------------------------------------------------------------------------
2333 AliITStrackMI * AliITStrackerMI::GetBest2Tracks(Int_t trackID1, Int_t trackID2, Float_t th0, Float_t th1){
2335 // try to find track hypothesys without conflicts
2336 // with minimal chi2;
2337 TClonesArray *arr1 = (TClonesArray*)fTrackHypothesys.At(trackID1);
2338 Int_t entries1 = arr1->GetEntriesFast();
2339 TClonesArray *arr2 = (TClonesArray*)fTrackHypothesys.At(trackID2);
2340 if (!arr2) return (AliITStrackMI*) arr1->UncheckedAt(0);
2341 Int_t entries2 = arr2->GetEntriesFast();
2342 if (entries2<=0) return (AliITStrackMI*) arr1->UncheckedAt(0);
2344 AliITStrackMI * track10=(AliITStrackMI*) arr1->UncheckedAt(0);
2345 AliITStrackMI * track20=(AliITStrackMI*) arr2->UncheckedAt(0);
2346 if (TMath::Abs(1./track10->Get1Pt())>0.5+TMath::Abs(1/track20->Get1Pt())) return track10;
2348 for (Int_t itrack=0;itrack<entries1;itrack++){
2349 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
2350 UnRegisterClusterTracks(track,trackID1);
2353 for (Int_t itrack=0;itrack<entries2;itrack++){
2354 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
2355 UnRegisterClusterTracks(track,trackID2);
2359 Float_t maxconflicts=6;
2360 Double_t maxchi2 =1000.;
2362 // get weight of hypothesys - using best hypothesy
2365 Int_t list1[6],list2[6];
2366 AliITSRecPoint *clist1[6], *clist2[6] ;
2367 RegisterClusterTracks(track10,trackID1);
2368 RegisterClusterTracks(track20,trackID2);
2369 Float_t conflict1 = GetNumberOfSharedClusters(track10,trackID1,list1,clist1);
2370 Float_t conflict2 = GetNumberOfSharedClusters(track20,trackID2,list2,clist2);
2371 UnRegisterClusterTracks(track10,trackID1);
2372 UnRegisterClusterTracks(track20,trackID2);
2375 Float_t chi21 =0,chi22=0,ncl1=0,ncl2=0;
2376 Float_t nerry[6],nerrz[6];
2377 Float_t *erry1=GetErrY(trackID1),*errz1 = GetErrZ(trackID1);
2378 Float_t *erry2=GetErrY(trackID2),*errz2 = GetErrZ(trackID2);
2379 for (Int_t i=0;i<6;i++){
2380 if ( (erry1[i]>0) && (erry2[i]>0)) {
2381 nerry[i] = TMath::Min(erry1[i],erry2[i]);
2382 nerrz[i] = TMath::Min(errz1[i],errz2[i]);
2384 nerry[i] = TMath::Max(erry1[i],erry2[i]);
2385 nerrz[i] = TMath::Max(errz1[i],errz2[i]);
2387 if (TMath::Abs(track10->GetDy(i))>0.000000000000001){
2388 chi21 += track10->GetDy(i)*track10->GetDy(i)/(nerry[i]*nerry[i]);
2389 chi21 += track10->GetDz(i)*track10->GetDz(i)/(nerrz[i]*nerrz[i]);
2392 if (TMath::Abs(track20->GetDy(i))>0.000000000000001){
2393 chi22 += track20->GetDy(i)*track20->GetDy(i)/(nerry[i]*nerry[i]);
2394 chi22 += track20->GetDz(i)*track20->GetDz(i)/(nerrz[i]*nerrz[i]);
2402 Float_t d1 = TMath::Sqrt(track10->GetD(0)*track10->GetD(0)+track10->GetD(1)*track10->GetD(1))+0.1;
2403 Float_t d2 = TMath::Sqrt(track20->GetD(0)*track20->GetD(0)+track20->GetD(1)*track20->GetD(1))+0.1;
2404 Float_t s1 = TMath::Sqrt(track10->GetSigmaY2()*track10->GetSigmaZ2());
2405 Float_t s2 = TMath::Sqrt(track20->GetSigmaY2()*track20->GetSigmaZ2());
2407 w1 = (d2/(d1+d2)+ 2*s2/(s1+s2)+
2408 +s2/(s1+s2)*0.5*(chi22+2.)/(chi21+chi22+4.)
2409 +1.*TMath::Abs(1./track10->Get1Pt())/(TMath::Abs(1./track10->Get1Pt())+TMath::Abs(1./track20->Get1Pt()))
2411 w2 = (d1/(d1+d2)+ 2*s1/(s1+s2)+
2412 s1/(s1+s2)*0.5*(chi21+2.)/(chi21+chi22+4.)
2413 +1.*TMath::Abs(1./track20->Get1Pt())/(TMath::Abs(1./track10->Get1Pt())+TMath::Abs(1./track20->Get1Pt()))
2416 Double_t sumw = w1+w2;
2420 w1 = (d2+0.5)/(d1+d2+1.);
2421 w2 = (d1+0.5)/(d1+d2+1.);
2423 // Float_t maxmax = w1*track10->fChi2MIP[0]+w2*track20->fChi2MIP[0]+w1*conflict1+w2*conflict2+1.;
2424 //Float_t maxconflicts0 = w1*conflict1+w2*conflict2;
2426 // get pair of "best" hypothesys
2428 Float_t * ny1 = GetNy(trackID1), * nz1 = GetNz(trackID1);
2429 Float_t * ny2 = GetNy(trackID2), * nz2 = GetNz(trackID2);
2431 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
2432 AliITStrackMI * track1=(AliITStrackMI*) arr1->UncheckedAt(itrack1);
2433 //if (track1->fFakeRatio>0) continue;
2434 RegisterClusterTracks(track1,trackID1);
2435 for (Int_t itrack2=0;itrack2<entries2;itrack2++){
2436 AliITStrackMI * track2=(AliITStrackMI*) arr2->UncheckedAt(itrack2);
2438 // Float_t current = w1*track1->fChi2MIP[0]+w2*track2->fChi2MIP[0];
2439 //if (track2->fFakeRatio>0) continue;
2441 RegisterClusterTracks(track2,trackID2);
2442 Int_t list1[6],list2[6];
2443 AliITSRecPoint *clist1[6], *clist2[6] ;
2444 Float_t cconflict1 = GetNumberOfSharedClusters(track1,trackID1,list1,clist1);
2445 Float_t cconflict2 = GetNumberOfSharedClusters(track2,trackID2,list2,clist2);
2446 UnRegisterClusterTracks(track2,trackID2);
2448 if (track1->GetConstrain()) nskipped+=w1*track1->GetNSkipped();
2449 if (track2->GetConstrain()) nskipped+=w2*track2->GetNSkipped();
2450 if (nskipped>0.5) continue;
2452 //if ( w1*conflict1+w2*conflict2>maxconflicts0) continue;
2453 if (conflict1+1<cconflict1) continue;
2454 if (conflict2+1<cconflict2) continue;
2458 for (Int_t i=0;i<6;i++){
2460 Float_t c1 =0.; // conflict coeficients
2462 if (clist1[i]&&clist2[i]){
2465 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-TMath::Max(ny1[i],ny2[i])-TMath::Max(nz1[i],nz2[i]));
2468 deltan = (clist1[i]->GetNz()-TMath::Max(nz1[i],nz2[i]));
2470 c1 = 2./TMath::Max(3.+deltan,2.);
2471 c2 = 2./TMath::Max(3.+deltan,2.);
2477 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-ny1[i]-nz1[i]);
2480 deltan = (clist1[i]->GetNz()-nz1[i]);
2482 c1 = 2./TMath::Max(3.+deltan,2.);
2489 deltan = (clist2[i]->GetNy()+clist2[i]->GetNz()-ny2[i]-nz2[i]);
2492 deltan = (clist2[i]->GetNz()-nz2[i]);
2494 c2 = 2./TMath::Max(3.+deltan,2.);
2499 Double_t chi21=0,chi22=0;
2500 if (TMath::Abs(track1->GetDy(i))>0.) {
2501 chi21 = (track1->GetDy(i)/track1->GetSigmaY(i))*(track1->GetDy(i)/track1->GetSigmaY(i))+
2502 (track1->GetDz(i)/track1->GetSigmaZ(i))*(track1->GetDz(i)/track1->GetSigmaZ(i));
2503 //chi21 = (track1->fDy[i]*track1->fDy[i])/(nerry[i]*nerry[i])+
2504 // (track1->GetDz(i)*track1->GetDz(i))/(nerrz[i]*nerrz[i]);
2506 if (TMath::Abs(track1->GetSigmaY(i)>0.)) c1=1;
2509 if (TMath::Abs(track2->GetDy(i))>0.) {
2510 chi22 = (track2->GetDy(i)/track2->GetSigmaY(i))*(track2->GetDy(i)/track2->GetSigmaY(i))+
2511 (track2->GetDz(i)/track2->GetSigmaZ(i))*(track2->GetDz(i)/track2->GetSigmaZ(i));
2512 //chi22 = (track2->fDy[i]*track2->fDy[i])/(nerry[i]*nerry[i])+
2513 // (track2->fDz[i]*track2->fDz[i])/(nerrz[i]*nerrz[i]);
2516 if (TMath::Abs(track2->GetSigmaY(i)>0.)) c2=1;
2518 sumchi2+=w1*(1.+c1)*(1+c1)*(chi21+c1)+w2*(1.+c2)*(1+c2)*(chi22+c2);
2519 if (chi21>0) sum+=w1;
2520 if (chi22>0) sum+=w2;
2523 Double_t norm = sum-w1*track1->GetNSkipped()-w2*track2->GetNSkipped();
2524 if (norm<0) norm =1/(w1*track1->GetNSkipped()+w2*track2->GetNSkipped());
2525 Double_t normchi2 = 2*conflict+sumchi2/sum;
2526 if ( normchi2 <maxchi2 ){
2529 maxconflicts = conflict;
2533 UnRegisterClusterTracks(track1,trackID1);
2536 // if (maxconflicts<4 && maxchi2<th0){
2537 if (maxchi2<th0*2.){
2538 Float_t orig = track10->GetFakeRatio()*track10->GetNumberOfClusters();
2539 AliITStrackMI* track1=(AliITStrackMI*) arr1->UncheckedAt(index1);
2540 track1->SetChi2MIP(5,maxconflicts);
2541 track1->SetChi2MIP(6,maxchi2);
2542 track1->SetChi2MIP(7,0.01+orig-(track1->GetFakeRatio()*track1->GetNumberOfClusters()));
2543 // track1->UpdateESDtrack(AliESDtrack::kITSin);
2544 track1->SetChi2MIP(8,index1);
2545 fBestTrackIndex[trackID1] =index1;
2546 UpdateESDtrack(track1, AliESDtrack::kITSin);
2548 else if (track10->GetChi2MIP(0)<th1){
2549 track10->SetChi2MIP(5,maxconflicts);
2550 track10->SetChi2MIP(6,maxchi2);
2551 // track10->UpdateESDtrack(AliESDtrack::kITSin);
2552 UpdateESDtrack(track10,AliESDtrack::kITSin);
2555 for (Int_t itrack=0;itrack<entries1;itrack++){
2556 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
2557 UnRegisterClusterTracks(track,trackID1);
2560 for (Int_t itrack=0;itrack<entries2;itrack++){
2561 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
2562 UnRegisterClusterTracks(track,trackID2);
2565 if (track10->GetConstrain()&&track10->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track10->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
2566 &&track10->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track10->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
2567 // if (track10->fChi2MIP[0]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track10->fChi2MIP[1]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
2568 // &&track10->fChi2MIP[2]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track10->fChi2MIP[3]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
2569 RegisterClusterTracks(track10,trackID1);
2571 if (track20->GetConstrain()&&track20->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track20->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
2572 &&track20->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track20->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
2573 //if (track20->fChi2MIP[0]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track20->fChi2MIP[1]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
2574 // &&track20->fChi2MIP[2]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track20->fChi2MIP[3]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
2575 RegisterClusterTracks(track20,trackID2);
2580 //------------------------------------------------------------------------
2581 void AliITStrackerMI::UseClusters(const AliKalmanTrack *t, Int_t from) const {
2582 //--------------------------------------------------------------------
2583 // This function marks clusters assigned to the track
2584 //--------------------------------------------------------------------
2585 AliTracker::UseClusters(t,from);
2587 AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(0));
2588 //if (c->GetQ()>2) c->Use();
2589 if (c->GetSigmaZ2()>0.1) c->Use();
2590 c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(1));
2591 //if (c->GetQ()>2) c->Use();
2592 if (c->GetSigmaZ2()>0.1) c->Use();
2595 //------------------------------------------------------------------------
2596 void AliITStrackerMI::AddTrackHypothesys(AliITStrackMI * track, Int_t esdindex)
2598 //------------------------------------------------------------------
2599 // add track to the list of hypothesys
2600 //------------------------------------------------------------------
2602 if (esdindex>=fTrackHypothesys.GetEntriesFast()) fTrackHypothesys.Expand(esdindex*2+10);
2604 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2606 array = new TObjArray(10);
2607 fTrackHypothesys.AddAt(array,esdindex);
2609 array->AddLast(track);
2611 //------------------------------------------------------------------------
2612 void AliITStrackerMI::SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode)
2614 //-------------------------------------------------------------------
2615 // compress array of track hypothesys
2616 // keep only maxsize best hypothesys
2617 //-------------------------------------------------------------------
2618 if (esdindex>fTrackHypothesys.GetEntriesFast()) return;
2619 if (! (fTrackHypothesys.At(esdindex)) ) return;
2620 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2621 Int_t entries = array->GetEntriesFast();
2623 //- find preliminary besttrack as a reference
2624 Float_t minchi2=10000;
2626 AliITStrackMI * besttrack=0;
2627 for (Int_t itrack=0;itrack<array->GetEntriesFast();itrack++){
2628 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2629 if (!track) continue;
2630 Float_t chi2 = NormalizedChi2(track,0);
2632 Int_t tpcLabel=track->GetESDtrack()->GetTPCLabel();
2633 track->SetLabel(tpcLabel);
2635 track->SetFakeRatio(1.);
2636 CookLabel(track,0.); //For comparison only
2638 //if (chi2<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track->fFakeRatio==0){
2639 if (chi2<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)){
2640 if (track->GetNumberOfClusters()<maxn) continue;
2641 maxn = track->GetNumberOfClusters();
2648 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
2649 delete array->RemoveAt(itrack);
2653 if (!besttrack) return;
2656 //take errors of best track as a reference
2657 Float_t *erry = GetErrY(esdindex), *errz = GetErrZ(esdindex);
2658 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
2659 for (Int_t i=0;i<6;i++) {
2660 if (besttrack->GetClIndex(i)>0){
2661 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2662 errz[i] = besttrack->GetSigmaZ(i); errz[i+6] = besttrack->GetSigmaZ(i+6);
2663 ny[i] = besttrack->GetNy(i);
2664 nz[i] = besttrack->GetNz(i);
2668 // calculate normalized chi2
2670 Float_t * chi2 = new Float_t[entries];
2671 Int_t * index = new Int_t[entries];
2672 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2673 for (Int_t itrack=0;itrack<entries;itrack++){
2674 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2676 track->SetChi2MIP(0,GetNormalizedChi2(track, mode));
2677 if (track->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0))
2678 chi2[itrack] = track->GetChi2MIP(0);
2680 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
2681 delete array->RemoveAt(itrack);
2687 TMath::Sort(entries,chi2,index,kFALSE);
2688 besttrack = (AliITStrackMI*)array->At(index[0]);
2689 if (besttrack&&besttrack->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)){
2690 for (Int_t i=0;i<6;i++){
2691 if (besttrack->GetClIndex(i)>0){
2692 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2693 errz[i] = besttrack->GetSigmaZ(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2694 ny[i] = besttrack->GetNy(i);
2695 nz[i] = besttrack->GetNz(i);
2700 // calculate one more time with updated normalized errors
2701 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2702 for (Int_t itrack=0;itrack<entries;itrack++){
2703 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2705 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
2706 if (track->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0))
2707 chi2[itrack] = track->GetChi2MIP(0)-0*(track->GetNumberOfClusters()+track->GetNDeadZone());
2710 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
2711 delete array->RemoveAt(itrack);
2716 entries = array->GetEntriesFast();
2720 TObjArray * newarray = new TObjArray();
2721 TMath::Sort(entries,chi2,index,kFALSE);
2722 besttrack = (AliITStrackMI*)array->At(index[0]);
2725 for (Int_t i=0;i<6;i++){
2726 if (besttrack->GetNz(i)>0&&besttrack->GetNy(i)>0){
2727 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2728 errz[i] = besttrack->GetSigmaZ(i); errz[i+6] = besttrack->GetSigmaZ(i+6);
2729 ny[i] = besttrack->GetNy(i);
2730 nz[i] = besttrack->GetNz(i);
2733 besttrack->SetChi2MIP(0,GetNormalizedChi2(besttrack,mode));
2734 Float_t minchi2 = TMath::Min(besttrack->GetChi2MIP(0)+5.+besttrack->GetNUsed(), double(AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)));
2735 Float_t minn = besttrack->GetNumberOfClusters()-3;
2737 for (Int_t i=0;i<entries;i++){
2738 AliITStrackMI * track = (AliITStrackMI*)array->At(index[i]);
2739 if (!track) continue;
2740 if (accepted>maxcut) break;
2741 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
2742 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
2743 if (track->GetNumberOfClusters()<6 && (track->GetChi2MIP(0)+track->GetNUsed()>minchi2)){
2744 delete array->RemoveAt(index[i]);
2748 Bool_t shortbest = !track->GetConstrain() && track->GetNumberOfClusters()<6;
2749 if ((track->GetChi2MIP(0)+track->GetNUsed()<minchi2 && track->GetNumberOfClusters()>=minn) ||shortbest){
2750 if (!shortbest) accepted++;
2752 newarray->AddLast(array->RemoveAt(index[i]));
2753 for (Int_t i=0;i<6;i++){
2755 erry[i] = track->GetSigmaY(i); erry[i+6] = track->GetSigmaY(i+6);
2756 errz[i] = track->GetSigmaZ(i); errz[i] = track->GetSigmaZ(i+6);
2757 ny[i] = track->GetNy(i);
2758 nz[i] = track->GetNz(i);
2763 delete array->RemoveAt(index[i]);
2767 delete fTrackHypothesys.RemoveAt(esdindex);
2768 fTrackHypothesys.AddAt(newarray,esdindex);
2772 delete fTrackHypothesys.RemoveAt(esdindex);
2778 //------------------------------------------------------------------------
2779 AliITStrackMI * AliITStrackerMI::GetBestHypothesys(Int_t esdindex, AliITStrackMI * original, Int_t checkmax)
2781 //-------------------------------------------------------------
2782 // try to find best hypothesy
2783 // currently - minimal chi2 of track+backpropagated track+matching to the tpc track
2784 //-------------------------------------------------------------
2785 if (fTrackHypothesys.GetEntriesFast()<=esdindex) return 0;
2786 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2787 if (!array) return 0;
2788 Int_t entries = array->GetEntriesFast();
2789 if (!entries) return 0;
2790 Float_t minchi2 = 100000;
2791 AliITStrackMI * besttrack=0;
2793 AliITStrackMI * backtrack = new AliITStrackMI(*original);
2794 AliITStrackMI * forwardtrack = new AliITStrackMI(*original);
2795 Double_t xyzv[]={GetX(),GetY(),GetZ()};
2796 Double_t ersv[]={GetSigmaX()/3.,GetSigmaY()/3.,GetSigmaZ()/3.};
2798 for (Int_t i=0;i<entries;i++){
2799 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
2800 if (!track) continue;
2801 Float_t sigmarfi,sigmaz;
2802 GetDCASigma(track,sigmarfi,sigmaz);
2803 track->SetDnorm(0,sigmarfi);
2804 track->SetDnorm(1,sigmaz);
2806 track->SetChi2MIP(1,1000000);
2807 track->SetChi2MIP(2,1000000);
2808 track->SetChi2MIP(3,1000000);
2811 backtrack = new(backtrack) AliITStrackMI(*track);
2812 if (track->GetConstrain()){
2813 if (!backtrack->PropagateTo(3.,0.0028,65.19)) continue;
2814 if (!backtrack->Improve(0,xyzv,ersv)) continue;
2815 //if (!backtrack->PropagateTo(2.,0.0028,0)) continue; // This
2816 //if (!backtrack->Improve(0,xyzv,ersv)) continue; // is
2817 //if (!backtrack->PropagateTo(1.,0.0028,0)) continue; // an over-kill
2818 //if (!backtrack->Improve(0,xyzv,ersv)) continue; // (I.B.)
2819 //if (!backtrack->PropagateToVertex()) continue; //
2820 backtrack->ResetCovariance(10.);
2821 //if (!backtrack->Improve(0,xyzv,ersv)) continue;
2823 backtrack->ResetCovariance(10.);
2825 backtrack->ResetClusters();
2827 Double_t x = original->GetX();
2828 if (!RefitAt(x,backtrack,track)) continue;
2830 track->SetChi2MIP(1,NormalizedChi2(backtrack,0));
2831 //for (Int_t i=2;i<6;i++){track->fDy[i]+=backtrack->fDy[i]; track->fDz[i]+=backtrack->fDz[i];}
2832 if (track->GetChi2MIP(1)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)*6.) continue;
2833 track->SetChi22(GetMatchingChi2(backtrack,original));
2835 if ((track->GetConstrain()) && track->GetChi22()>90.) continue;
2836 if ((!track->GetConstrain()) && track->GetChi22()>30.) continue;
2837 if ( track->GetChi22()/track->GetNumberOfClusters()>11.) continue;
2840 if (!(track->GetConstrain())&&track->GetChi2MIP(1)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)) continue;
2844 //forward track - without constraint
2845 forwardtrack = new(forwardtrack) AliITStrackMI(*original);
2846 forwardtrack->ResetClusters();
2848 RefitAt(x,forwardtrack,track);
2849 track->SetChi2MIP(2,NormalizedChi2(forwardtrack,0));
2850 if (track->GetChi2MIP(2)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)*6.0) continue;
2851 if (!(track->GetConstrain())&&track->GetChi2MIP(2)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)) continue;
2853 //track->fD[0] = forwardtrack->GetD(GetX(),GetY());
2854 //track->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
2855 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),track->GetDP()); //I.B.
2856 forwardtrack->SetD(0,track->GetD(0));
2857 forwardtrack->SetD(1,track->GetD(1));
2860 AliITSRecPoint* clist[6];
2861 track->SetChi2MIP(4,GetNumberOfSharedClusters(track,esdindex,list,clist));
2862 if ( (!track->GetConstrain()) && track->GetChi2MIP(4)>1.0) continue;
2865 track->SetChi2MIP(3,GetInterpolatedChi2(forwardtrack,backtrack));
2866 if ( (track->GetChi2MIP(3)>6.*AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3))) continue;
2867 if ( (!track->GetConstrain()) && (track->GetChi2MIP(3)>2*AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3))) {
2868 track->SetChi2MIP(3,1000);
2871 Double_t chi2 = track->GetChi2MIP(0)+track->GetNUsed();
2873 for (Int_t ichi=0;ichi<5;ichi++){
2874 forwardtrack->SetChi2MIP(ichi, track->GetChi2MIP(ichi));
2876 if (chi2 < minchi2){
2877 //besttrack = new AliITStrackMI(*forwardtrack);
2879 besttrack->SetLabel(track->GetLabel());
2880 besttrack->SetFakeRatio(track->GetFakeRatio());
2882 //original->fD[0] = forwardtrack->GetD(GetX(),GetY());
2883 //original->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
2884 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),original->GetDP()); //I.B.
2888 delete forwardtrack;
2890 for (Int_t i=0;i<entries;i++){
2891 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
2892 if (!track) continue;
2894 if (accepted>checkmax || track->GetChi2MIP(3)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)*6. ||
2895 (track->GetNumberOfClusters()<besttrack->GetNumberOfClusters()-1.)||
2896 track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*besttrack->GetNUsed()+3.){
2897 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
2898 delete array->RemoveAt(i);
2908 SortTrackHypothesys(esdindex,checkmax,1);
2909 array = (TObjArray*) fTrackHypothesys.At(esdindex);
2910 if (!array) return 0; // PH What can be the reason? Check SortTrackHypothesys
2911 besttrack = (AliITStrackMI*)array->At(0);
2912 if (!besttrack) return 0;
2913 besttrack->SetChi2MIP(8,0);
2914 fBestTrackIndex[esdindex]=0;
2915 entries = array->GetEntriesFast();
2916 AliITStrackMI *longtrack =0;
2918 Float_t minn=besttrack->GetNumberOfClusters()+besttrack->GetNDeadZone();
2919 for (Int_t itrack=entries-1;itrack>0;itrack--){
2920 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2921 if (!track->GetConstrain()) continue;
2922 if (track->GetNumberOfClusters()+track->GetNDeadZone()<minn) continue;
2923 if (track->GetChi2MIP(0)-besttrack->GetChi2MIP(0)>0.0) continue;
2924 if (track->GetChi2MIP(0)>4.) continue;
2925 minn = track->GetNumberOfClusters()+track->GetNDeadZone();
2928 //if (longtrack) besttrack=longtrack;
2931 AliITSRecPoint * clist[6];
2932 Float_t shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
2933 if (besttrack->GetConstrain()&&besttrack->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&besttrack->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
2934 &&besttrack->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&besttrack->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
2935 RegisterClusterTracks(besttrack,esdindex);
2942 Int_t sharedtrack = GetOverlapTrack(besttrack, esdindex, nshared, list, overlist);
2943 if (sharedtrack>=0){
2945 besttrack = GetBest2Tracks(esdindex,sharedtrack,10,5.5);
2947 shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
2953 if (shared>2.5) return 0;
2954 if (shared>1.0) return besttrack;
2956 // Don't sign clusters if not gold track
2958 if (!besttrack->IsGoldPrimary()) return besttrack;
2959 if (besttrack->GetESDtrack()->GetKinkIndex(0)!=0) return besttrack; //track belong to kink
2961 if (fConstraint[fPass]){
2965 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
2966 for (Int_t i=0;i<6;i++){
2967 Int_t index = besttrack->GetClIndex(i);
2968 if (index<=0) continue;
2969 Int_t ilayer = (index & 0xf0000000) >> 28;
2970 if (besttrack->GetSigmaY(ilayer)<0.00000000001) continue;
2971 AliITSRecPoint *c = (AliITSRecPoint*)GetCluster(index);
2973 if (ilayer>3&&c->GetNy()+c->GetNz()>6) continue;
2974 if ( (c->GetNy()+c->GetNz() )> ny[i]+nz[i]+0.7) continue; //shared track
2975 if ( c->GetNz()> nz[i]+0.7) continue; //shared track
2976 if ( ilayer>2&& besttrack->GetNormQ(ilayer)/besttrack->GetExpQ()>1.5) continue;
2977 //if ( c->GetNy()> ny[i]+0.7) continue; //shared track
2979 Bool_t cansign = kTRUE;
2980 for (Int_t itrack=0;itrack<entries; itrack++){
2981 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
2982 if (!track) continue;
2983 if (track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*shared+1.) break;
2984 if ( (track->GetClIndex(ilayer)>0) && (track->GetClIndex(ilayer)!=besttrack->GetClIndex(ilayer))){
2990 if (TMath::Abs(besttrack->GetDy(ilayer)/besttrack->GetSigmaY(ilayer))>3.) continue;
2991 if (TMath::Abs(besttrack->GetDz(ilayer)/besttrack->GetSigmaZ(ilayer))>3.) continue;
2992 if (!c->IsUsed()) c->Use();
2998 //------------------------------------------------------------------------
2999 void AliITStrackerMI::GetBestHypothesysMIP(TObjArray &itsTracks)
3002 // get "best" hypothesys
3005 Int_t nentries = itsTracks.GetEntriesFast();
3006 for (Int_t i=0;i<nentries;i++){
3007 AliITStrackMI* track = (AliITStrackMI*)itsTracks.At(i);
3008 if (!track) continue;
3009 TObjArray * array = (TObjArray*) fTrackHypothesys.At(i);
3010 if (!array) continue;
3011 if (array->GetEntriesFast()<=0) continue;
3013 AliITStrackMI* longtrack=0;
3015 Float_t maxchi2=1000;
3016 for (Int_t j=0;j<array->GetEntriesFast();j++){
3017 AliITStrackMI* track = (AliITStrackMI*)array->At(j);
3018 if (!track) continue;
3019 if (track->GetGoldV0()) {
3020 longtrack = track; //gold V0 track taken
3023 if (track->GetNumberOfClusters()+track->GetNDeadZone()<minn) continue;
3024 Float_t chi2 = track->GetChi2MIP(0);
3026 if (!track->GetGoldV0()&&track->GetConstrain()==kFALSE) chi2+=5;
3028 if (track->GetNumberOfClusters()+track->GetNDeadZone()>minn) maxchi2 = track->GetChi2MIP(0);
3030 if (chi2 > maxchi2) continue;
3031 minn= track->GetNumberOfClusters()+track->GetNDeadZone();
3038 AliITStrackMI * besttrack = (AliITStrackMI*)array->At(0);
3039 if (!longtrack) {longtrack = besttrack;}
3040 else besttrack= longtrack;
3044 AliITSRecPoint * clist[6];
3045 Float_t shared = GetNumberOfSharedClusters(longtrack,i,list,clist);
3047 track->SetNUsed(shared);
3048 track->SetNSkipped(besttrack->GetNSkipped());
3049 track->SetChi2MIP(0,besttrack->GetChi2MIP(0));
3054 Int_t sharedtrack = GetOverlapTrack(longtrack, i, nshared, list, overlist);
3055 //if (sharedtrack==-1) sharedtrack=0;
3056 if (sharedtrack>=0){
3057 besttrack = GetBest2Tracks(i,sharedtrack,10,5.5);
3060 if (besttrack&&fAfterV0){
3061 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3063 if (besttrack&&fConstraint[fPass])
3064 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3065 //if (besttrack&&besttrack->fConstrain)
3066 // UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3067 if (besttrack->GetChi2MIP(0)+besttrack->GetNUsed()>1.5){
3068 if ( (TMath::Abs(besttrack->GetD(0))>0.1) && fConstraint[fPass]) {
3069 track->SetReconstructed(kFALSE);
3071 if ( (TMath::Abs(besttrack->GetD(1))>0.1) && fConstraint[fPass]){
3072 track->SetReconstructed(kFALSE);
3079 //------------------------------------------------------------------------
3080 void AliITStrackerMI::CookLabel(AliITStrackMI *track,Float_t wrong) const {
3081 //--------------------------------------------------------------------
3082 //This function "cooks" a track label. If label<0, this track is fake.
3083 //--------------------------------------------------------------------
3086 if ( track->GetESDtrack()) tpcLabel = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
3088 track->SetChi2MIP(9,0);
3090 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3091 Int_t cindex = track->GetClusterIndex(i);
3092 Int_t l=(cindex & 0xf0000000) >> 28;
3093 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
3095 for (Int_t ind=0;ind<3;ind++){
3097 if (cl->GetLabel(ind)==tpcLabel) isWrong=0;
3099 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
3102 track->SetFakeRatio(double(nwrong)/double(track->GetNumberOfClusters()));
3104 if (track->GetFakeRatio()>wrong) track->SetLabel(-tpcLabel);
3106 track->SetLabel(tpcLabel);
3110 //------------------------------------------------------------------------
3111 void AliITStrackerMI::CookdEdx(AliITStrackMI* track)
3116 //AliITSRecPoint * clist[6];
3117 // Int_t shared = GetNumberOfSharedClusters(track,index,list,clist);
3120 track->SetChi2MIP(9,0);
3121 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3122 Int_t cindex = track->GetClusterIndex(i);
3123 Int_t l=(cindex & 0xf0000000) >> 28;
3124 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
3125 Int_t lab = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
3127 for (Int_t ind=0;ind<3;ind++){
3128 if (cl->GetLabel(ind)==lab) isWrong=0;
3130 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
3132 //if (l>3 && (cl->GetNy()>4) || (cl->GetNz()>4)) continue; //shared track
3133 //if (l>3&& !(cl->GetType()==1||cl->GetType()==10)) continue;
3134 //if (l<4&& !(cl->GetType()==1)) continue;
3135 dedx[accepted]= track->GetSampledEdx(i);
3136 //dedx[accepted]= track->fNormQ[l];
3144 TMath::Sort(accepted,dedx,indexes,kFALSE);
3147 Double_t nl=low*accepted, nu =up*accepted;
3149 Float_t sumweight =0;
3150 for (Int_t i=0; i<accepted; i++) {
3152 if (i<nl+0.1) weight = TMath::Max(1.-(nl-i),0.);
3153 if (i>nu-1) weight = TMath::Max(nu-i,0.);
3154 sumamp+= dedx[indexes[i]]*weight;
3157 track->SetdEdx(sumamp/sumweight);
3159 //------------------------------------------------------------------------
3160 void AliITStrackerMI::MakeCoeficients(Int_t ntracks){
3163 if (fCoeficients) delete []fCoeficients;
3164 fCoeficients = new Float_t[ntracks*48];
3165 for (Int_t i=0;i<ntracks*48;i++) fCoeficients[i]=-1.;
3167 //------------------------------------------------------------------------
3168 Double_t AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer)
3174 Float_t theta = track->GetTgl();
3175 Float_t phi = track->GetSnp();
3176 phi = TMath::Sqrt(phi*phi/(1.-phi*phi));
3177 GetError(layer,cluster,theta,phi,track->GetExpQ(),erry,errz);
3178 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz);
3180 GetNTeor(layer,cluster, theta,phi,ny,nz);
3181 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
3183 chi2+=0.5*TMath::Min(delta/2,2.);
3184 chi2+=2.*cluster->GetDeltaProbability();
3187 track->SetNy(layer,ny);
3188 track->SetNz(layer,nz);
3189 track->SetSigmaY(layer,erry);
3190 track->SetSigmaZ(layer, errz);
3191 //track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt(1+theta*theta+phi*phi);
3192 track->SetNormQ(layer,cluster->GetQ()/TMath::Sqrt((1.+ track->GetTgl()*track->GetTgl())/(1.- track->GetSnp()*track->GetSnp())));
3197 Int_t AliITStrackerMI::UpdateMI(AliITStrackMI* track, const AliITSRecPoint* cl,Double_t chi2,Int_t index) const
3202 Int_t layer = (index & 0xf0000000) >> 28;
3203 track->SetClIndex(layer, index);
3204 if ( (layer>1) &&track->GetNormQ(layer)/track->GetExpQ()<0.5 ) {
3205 chi2+= (0.5-track->GetNormQ(layer)/track->GetExpQ())*10.;
3206 track->SetdEdxMismatch(track->GetdEdxMismatch()+(0.5-track->GetNormQ(layer)/track->GetExpQ())*10.);
3209 if (cl->GetQ()<=0) return 0; // ingore the "virtual" clusters
3211 // Take into account the mis-alignment
3212 Double_t x=track->GetX()+cl->GetX();
3213 if (!track->PropagateTo(x,0.,0.)) return 0;
3215 return track->UpdateMI(cl->GetY(),cl->GetZ(),track->GetSigmaY(layer),track->GetSigmaZ(layer),chi2,index);
3218 void AliITStrackerMI::GetNTeor(Int_t layer, const AliITSRecPoint* /*cl*/, Float_t theta, Float_t phi, Float_t &ny, Float_t &nz)
3224 ny = 1.+TMath::Abs(phi)*3.2;
3225 nz = 1.+TMath::Abs(theta)*0.34;
3229 ny = 1.+TMath::Abs(phi)*3.2;
3230 nz = 1.+TMath::Abs(theta)*0.28;
3235 ny = 2.02+TMath::Abs(phi)*1.95;
3236 nz = 2.02+TMath::Abs(phi)*2.35;
3239 ny = 6.6-2.7*TMath::Abs(phi);
3240 nz = 2.8-3.11*TMath::Abs(phi)+0.45*TMath::Abs(theta);
3245 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)
3247 //calculate cluster position error
3250 GetNTeor(layer, cl,theta,phi,ny,nz);
3251 erry = TMath::Sqrt(cl->GetSigmaY2());
3252 errz = TMath::Sqrt(cl->GetSigmaZ2());
3257 if (TMath::Abs(ny-cl->GetNy())>0.6) {
3258 if (ny<cl->GetNy()){
3259 erry*=0.4+TMath::Abs(ny-cl->GetNy());
3260 errz*=0.4+TMath::Abs(ny-cl->GetNy());
3262 erry*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
3263 errz*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
3266 if (TMath::Abs(nz-cl->GetNz())>1.) {
3267 erry*=TMath::Abs(nz-cl->GetNz());
3268 errz*=TMath::Abs(nz-cl->GetNz());
3272 erry= TMath::Min(erry,float(0.005));
3273 errz= TMath::Min(errz,float(0.03));
3279 //factor 1.8 appears in new simulation
3282 if (cl->GetNy()==100||cl->GetNz()==100){
3287 if (cl->GetNy()+cl->GetNz()>12){
3292 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
3293 Float_t chargematch = TMath::Max(double(normq/expQ),2.);
3295 if (cl->GetType()==1 || cl->GetType()==10 ){
3296 if (chargematch<1.0 || (cl->GetNy()+cl->GetNz()<nz+ny+0.5)){
3298 erry = 0.00094*scale;
3301 if (cl->GetNy()+cl->GetNz()<nz+ny+1.2){
3306 erry = 0.0027*scale;
3307 errz = TMath::Min(0.028*(chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.15)*scale;
3310 if (cl->GetType()==2 || cl->GetType()==11 ){
3311 erry = TMath::Min(0.0010*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.05)*scale;
3312 errz = TMath::Min(0.025*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.5)*scale;
3316 if (cl->GetType()>100 ){
3317 if ((chargematch+cl->GetNy()+cl->GetNz()-nz-ny<1.5)){
3319 erry = 0.00096*scale;
3322 if (cl->GetNy()+cl->GetNz()-nz-ny<1){
3324 erry = 0.0025*scale;
3328 errz = TMath::Min(0.05*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.4)*scale;
3329 erry = TMath::Min(0.003*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.05)*scale;
3332 Float_t diff = cl->GetNy()+cl->GetNz()-ny-nz;
3336 if (cl->GetType()==5||cl->GetType()==6||cl->GetType()==7||cl->GetType()==8){
3346 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
3347 Float_t chargematch = normq/expQ;
3349 Int_t cnz = cl->GetNz()%10;
3351 if (cl->GetType()==1){
3352 if (chargematch<1.25){
3353 erry = 0.0028*(1.+6./cl->GetQ()); // gold clusters
3356 erry = 0.003*chargematch;
3357 if (cl->GetNz()==3) erry*=1.5;
3359 if (chargematch<1.0){
3360 errz = 0.0011*(1.+6./cl->GetQ());
3363 errz = 0.002*(1+2*(chargematch-1.));
3367 errz*=1.4*(cnz-nz+0.5);
3370 if (cl->GetType()>1){
3372 erry = 0.00385*(1.+6./cl->GetQ()); // gold clusters
3373 errz = 0.0016*(1.+6./cl->GetQ());
3376 errz = 0.0014*(1+3*(chargematch-1.));
3377 erry = 0.003*(1+3*(chargematch-1.));
3381 errz*=1.4*(cnz-nz+0.5);
3385 if (TMath::Abs(cl->GetY())>2.5){
3386 factorz*=1+2*(TMath::Abs(cl->GetY())-2.5);
3388 if (TMath::Abs(cl->GetY())<1){
3389 factorz*=1.+0.5*TMath::Abs(TMath::Abs(cl->GetY())-1.);
3391 factorz= TMath::Min(factorz,float(4.));
3394 erry= TMath::Min(erry,float(0.05));
3395 errz= TMath::Min(errz,float(0.05));
3398 //------------------------------------------------------------------------
3399 void AliITStrackerMI::GetDCASigma(AliITStrackMI* track, Float_t & sigmarfi, Float_t &sigmaz)
3402 //DCA sigmas parameterization
3403 //to be paramterized using external parameters in future
3406 sigmarfi = 0.004+1.4 *TMath::Abs(track->GetC())+332.*track->GetC()*track->GetC();
3407 sigmaz = 0.011+4.37*TMath::Abs(track->GetC());
3411 void AliITStrackerMI::SignDeltas( TObjArray *ClusterArray, Float_t vz)
3415 Int_t entries = ClusterArray->GetEntriesFast();
3416 if (entries<4) return;
3417 AliITSRecPoint* cluster = (AliITSRecPoint*)ClusterArray->At(0);
3418 Int_t layer = cluster->GetLayer();
3419 if (layer>1) return;
3421 Int_t ncandidates=0;
3422 Float_t r = (layer>0)? 7:4;
3424 for (Int_t i=0;i<entries;i++){
3425 AliITSRecPoint* cl0 = (AliITSRecPoint*)ClusterArray->At(i);
3426 Float_t nz = 1+TMath::Abs((cl0->GetZ()-vz)/r);
3427 if (cl0->GetNy()+cl0->GetNz()<=5+2*layer+nz) continue;
3428 index[ncandidates] = i; //candidate to belong to delta electron track
3430 if (cl0->GetNy()+cl0->GetNz()>9+2*layer+nz) {
3431 cl0->SetDeltaProbability(1);
3437 for (Int_t i=0;i<ncandidates;i++){
3438 AliITSRecPoint* cl0 = (AliITSRecPoint*)ClusterArray->At(index[i]);
3439 if (cl0->GetDeltaProbability()>0.8) continue;
3442 Float_t y[100],z[100],sumy,sumz,sumy2, sumyz, sumw;
3443 sumy=sumz=sumy2=sumyz=sumw=0.0;
3444 for (Int_t j=0;j<ncandidates;j++){
3446 AliITSRecPoint* cl1 = (AliITSRecPoint*)ClusterArray->At(index[j]);
3448 Float_t dz = cl0->GetZ()-cl1->GetZ();
3449 Float_t dy = cl0->GetY()-cl1->GetY();
3450 if (TMath::Sqrt(dz*dz+dy*dy)<0.2){
3451 Float_t weight = cl1->GetNy()+cl1->GetNz()-2;
3452 y[ncl] = cl1->GetY();
3453 z[ncl] = cl1->GetZ();
3454 sumy+= y[ncl]*weight;
3455 sumz+= z[ncl]*weight;
3456 sumy2+=y[ncl]*y[ncl]*weight;
3457 sumyz+=y[ncl]*z[ncl]*weight;
3462 if (ncl<4) continue;
3463 Float_t det = sumw*sumy2 - sumy*sumy;
3465 if (TMath::Abs(det)>0.01){
3466 Float_t z0 = (sumy2*sumz - sumy*sumyz)/det;
3467 Float_t k = (sumyz*sumw - sumy*sumz)/det;
3468 delta = TMath::Abs(cl0->GetZ()-(z0+k*cl0->GetY()));
3471 Float_t z0 = sumyz/sumy;
3472 delta = TMath::Abs(cl0->GetZ()-z0);
3475 cl0->SetDeltaProbability(1-20.*delta);
3479 //------------------------------------------------------------------------
3480 void AliITStrackerMI::UpdateESDtrack(AliITStrackMI* track, ULong_t flags) const
3484 track->UpdateESDtrack(flags);
3485 AliITStrackMI * oldtrack = (AliITStrackMI*)(track->GetESDtrack()->GetITStrack());
3486 if (oldtrack) delete oldtrack;
3487 track->GetESDtrack()->SetITStrack(new AliITStrackMI(*track));
3488 if (TMath::Abs(track->GetDnorm(1))<0.000000001){
3489 printf("Problem\n");
3492 //------------------------------------------------------------------------
3493 Int_t AliITStrackerMI::GetNearestLayer(const Double_t *xr) const{
3495 //Get nearest upper layer close to the point xr.
3496 // rough approximation
3498 const Float_t kRadiuses[6]={4,6.5,15.03,24.,38.5,43.7};
3499 Float_t radius = TMath::Sqrt(xr[0]*xr[0]+xr[1]*xr[1]);
3501 for (Int_t i=0;i<6;i++){
3502 if (radius<kRadiuses[i]){
3509 //------------------------------------------------------------------------
3510 void AliITStrackerMI::UpdateTPCV0(AliESDEvent *event){
3512 //try to update, or reject TPC V0s
3514 Int_t nv0s = event->GetNumberOfV0s();
3515 Int_t nitstracks = fTrackHypothesys.GetEntriesFast();
3517 for (Int_t i=0;i<nv0s;i++){
3518 AliESDv0 * vertex = event->GetV0(i);
3519 Int_t ip = vertex->GetIndex(0);
3520 Int_t im = vertex->GetIndex(1);
3522 TObjArray * arrayp = (ip<nitstracks) ? (TObjArray*)fTrackHypothesys.At(ip):0;
3523 TObjArray * arraym = (im<nitstracks) ? (TObjArray*)fTrackHypothesys.At(im):0;
3524 AliITStrackMI * trackp = (arrayp!=0) ? (AliITStrackMI*)arrayp->At(0):0;
3525 AliITStrackMI * trackm = (arraym!=0) ? (AliITStrackMI*)arraym->At(0):0;
3529 if (trackp->GetNumberOfClusters()+trackp->GetNDeadZone()>5.5){
3530 if (trackp->GetConstrain()&&trackp->GetChi2MIP(0)<3) vertex->SetStatus(-100);
3531 if (!trackp->GetConstrain()&&trackp->GetChi2MIP(0)<2) vertex->SetStatus(-100);
3536 if (trackm->GetNumberOfClusters()+trackm->GetNDeadZone()>5.5){
3537 if (trackm->GetConstrain()&&trackm->GetChi2MIP(0)<3) vertex->SetStatus(-100);
3538 if (!trackm->GetConstrain()&&trackm->GetChi2MIP(0)<2) vertex->SetStatus(-100);
3541 if (vertex->GetStatus()==-100) continue;
3543 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
3544 Int_t clayer = GetNearestLayer(xrp); //I.B.
3545 vertex->SetNBefore(clayer); //
3546 vertex->SetChi2Before(9*clayer); //
3547 vertex->SetNAfter(6-clayer); //
3548 vertex->SetChi2After(0); //
3550 if (clayer >1 ){ // calculate chi2 before vertex
3551 Float_t chi2p = 0, chi2m=0;
3554 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
3555 if (trackp->GetClIndex(ilayer)>0){
3556 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+
3557 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));
3568 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
3569 if (trackm->GetClIndex(ilayer)>0){
3570 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+
3571 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));
3580 vertex->SetChi2Before(TMath::Min(chi2p,chi2m));
3581 if (TMath::Min(chi2p,chi2m)/Float_t(clayer)<4) vertex->SetStatus(-10); // track exist before vertex
3584 if (clayer < 5 ){ // calculate chi2 after vertex
3585 Float_t chi2p = 0, chi2m=0;
3587 if (trackp&&TMath::Abs(trackp->GetTgl())<1.){
3588 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
3589 if (trackp->GetClIndex(ilayer)>0){
3590 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+
3591 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));
3601 if (trackm&&TMath::Abs(trackm->GetTgl())<1.){
3602 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
3603 if (trackm->GetClIndex(ilayer)>0){
3604 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+
3605 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));
3614 vertex->SetChi2After(TMath::Max(chi2p,chi2m));
3615 if (TMath::Max(chi2m,chi2p)/Float_t(6-clayer)>9) vertex->SetStatus(-20); // track not found in ITS
3620 //------------------------------------------------------------------------
3621 void AliITStrackerMI::FindV02(AliESDEvent *event)
3626 // Cuts on DCA - R dependent
3627 // max distance DCA between 2 tracks cut
3628 // maxDist = TMath::Min(kMaxDist,kMaxDist0+pvertex->GetRr()*kMaxDist);
3630 const Float_t kMaxDist0 = 0.1;
3631 const Float_t kMaxDist1 = 0.1;
3632 const Float_t kMaxDist = 1;
3633 const Float_t kMinPointAngle = 0.85;
3634 const Float_t kMinPointAngle2 = 0.99;
3635 const Float_t kMinR = 0.5;
3636 const Float_t kMaxR = 220;
3637 //const Float_t kCausality0Cut = 0.19;
3638 //const Float_t kLikelihood01Cut = 0.25;
3639 //const Float_t kPointAngleCut = 0.9996;
3640 const Float_t kCausality0Cut = 0.19;
3641 const Float_t kLikelihood01Cut = 0.45;
3642 const Float_t kLikelihood1Cut = 0.5;
3643 const Float_t kCombinedCut = 0.55;
3647 TTreeSRedirector &cstream = *fDebugStreamer;
3648 Int_t ntracks = event->GetNumberOfTracks();
3649 Int_t nitstracks = fTrackHypothesys.GetEntriesFast();
3650 fOriginal.Expand(ntracks);
3651 fTrackHypothesys.Expand(ntracks);
3652 fBestHypothesys.Expand(ntracks);
3654 AliHelix * helixes = new AliHelix[ntracks+2];
3655 TObjArray trackarray(ntracks+2); //array with tracks - with vertex constrain
3656 TObjArray trackarrayc(ntracks+2); //array of "best tracks" - without vertex constrain
3657 TObjArray trackarrayl(ntracks+2); //array of "longest tracks" - without vertex constrain
3658 Bool_t * forbidden = new Bool_t [ntracks+2];
3659 Int_t *itsmap = new Int_t [ntracks+2];
3660 Float_t *dist = new Float_t[ntracks+2];
3661 Float_t *normdist0 = new Float_t[ntracks+2];
3662 Float_t *normdist1 = new Float_t[ntracks+2];
3663 Float_t *normdist = new Float_t[ntracks+2];
3664 Float_t *norm = new Float_t[ntracks+2];
3665 Float_t *maxr = new Float_t[ntracks+2];
3666 Float_t *minr = new Float_t[ntracks+2];
3667 Float_t *minPointAngle= new Float_t[ntracks+2];
3669 AliV0 *pvertex = new AliV0;
3670 AliITStrackMI * dummy= new AliITStrackMI;
3672 AliITStrackMI trackat0; //temporary track for DCA calculation
3674 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
3676 // make its - esd map
3678 for (Int_t itrack=0;itrack<ntracks+2;itrack++) {
3679 itsmap[itrack] = -1;
3680 forbidden[itrack] = kFALSE;
3681 maxr[itrack] = kMaxR;
3682 minr[itrack] = kMinR;
3683 minPointAngle[itrack] = kMinPointAngle;
3685 for (Int_t itrack=0;itrack<nitstracks;itrack++){
3686 AliITStrackMI * original = (AliITStrackMI*)(fOriginal.At(itrack));
3687 Int_t esdindex = original->GetESDtrack()->GetID();
3688 itsmap[esdindex] = itrack;
3691 // create its tracks from esd tracks if not done before
3693 for (Int_t itrack=0;itrack<ntracks;itrack++){
3694 if (itsmap[itrack]>=0) continue;
3695 AliITStrackMI * tpctrack = new AliITStrackMI(*(event->GetTrack(itrack)));
3696 //tpctrack->fD[0] = tpctrack->GetD(GetX(),GetY());
3697 //tpctrack->fD[1] = tpctrack->GetZat(GetX())-GetZ();
3698 tpctrack->GetDZ(GetX(),GetY(),GetZ(),tpctrack->GetDP()); //I.B.
3699 if (tpctrack->GetD(0)<20 && tpctrack->GetD(1)<20){
3700 // tracks which can reach inner part of ITS
3701 // propagate track to outer its volume - with correction for material
3702 CorrectForDeadZoneMaterial(tpctrack);
3704 itsmap[itrack] = nitstracks;
3705 fOriginal.AddAt(tpctrack,nitstracks);
3709 // fill temporary arrays
3711 for (Int_t itrack=0;itrack<ntracks;itrack++){
3712 AliESDtrack * esdtrack = event->GetTrack(itrack);
3713 Int_t itsindex = itsmap[itrack];
3714 AliITStrackMI *original = (AliITStrackMI*)fOriginal.At(itsmap[itrack]);
3715 if (!original) continue;
3716 AliITStrackMI *bestConst = 0;
3717 AliITStrackMI *bestLong = 0;
3718 AliITStrackMI *best = 0;
3721 TObjArray * array = (TObjArray*) fTrackHypothesys.At(itsindex);
3722 Int_t hentries = (array==0) ? 0 : array->GetEntriesFast();
3723 // Get best track with vertex constrain
3724 for (Int_t ih=0;ih<hentries;ih++){
3725 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
3726 if (!trackh->GetConstrain()) continue;
3727 if (!bestConst) bestConst = trackh;
3728 if (trackh->GetNumberOfClusters()>5.0){
3729 bestConst = trackh; // full track - with minimal chi2
3732 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()) continue;
3736 // Get best long track without vertex constrain and best track without vertex constrain
3737 for (Int_t ih=0;ih<hentries;ih++){
3738 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
3739 if (trackh->GetConstrain()) continue;
3740 if (!best) best = trackh;
3741 if (!bestLong) bestLong = trackh;
3742 if (trackh->GetNumberOfClusters()>5.0){
3743 bestLong = trackh; // full track - with minimal chi2
3746 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()) continue;
3751 bestLong = original;
3753 //I.B. trackat0 = *bestLong;
3754 new (&trackat0) AliITStrackMI(*bestLong);
3755 Double_t xx,yy,zz,alpha;
3756 bestLong->GetGlobalXYZat(bestLong->GetX(),xx,yy,zz);
3757 alpha = TMath::ATan2(yy,xx);
3758 trackat0.Propagate(alpha,0);
3759 // calculate normalized distances to the vertex
3761 Float_t ptfac = (1.+100.*TMath::Abs(trackat0.GetC()));
3762 if ( bestLong->GetNumberOfClusters()>3 ){
3763 dist[itsindex] = trackat0.GetY();
3764 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
3765 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
3766 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
3767 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
3769 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<6) normdist[itsindex]*=2.;
3770 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<5) normdist[itsindex]*=2.;
3771 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<4) normdist[itsindex]*=2.;
3773 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<6) normdist[itsindex]*=1.5;
3774 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<5) normdist[itsindex]*=1.5;
3778 if (bestConst&&bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5){
3779 dist[itsindex] = bestConst->GetD(0);
3780 norm[itsindex] = bestConst->GetDnorm(0);
3781 normdist0[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
3782 normdist1[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
3783 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
3785 dist[itsindex] = trackat0.GetY();
3786 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
3787 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
3788 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
3789 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
3790 if (TMath::Abs(trackat0.GetTgl())>1.05){
3791 if (normdist[itsindex]<3) forbidden[itsindex]=kTRUE;
3792 if (normdist[itsindex]>3) {
3793 minr[itsindex] = TMath::Max(Float_t(40.),minr[itsindex]);
3799 //-----------------------------------------------------------
3800 //Forbid primary track candidates -
3802 //treetr->SetAlias("forbidden0","Tr0.fN<4&&Tr1.fN+Tr1.fNDeadZone>4.5");
3803 //treetr->SetAlias("forbidden1","ND<3&&Tr1.fN+Tr1.fNDeadZone>5.5");
3804 //treetr->SetAlias("forbidden2","ND<2&&Tr1.fClIndex[0]>0&&Tr1.fClIndex[0]>0");
3805 //treetr->SetAlias("forbidden3","ND<1&&Tr1.fClIndex[0]>0");
3806 //treetr->SetAlias("forbidden4","ND<4&&Tr1.fNormChi2[0]<2");
3807 //treetr->SetAlias("forbidden5","ND<5&&Tr1.fNormChi2[0]<1");
3808 //-----------------------------------------------------------
3810 if (bestLong->GetNumberOfClusters()<4 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5) forbidden[itsindex]=kTRUE;
3811 if (normdist[itsindex]<3 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>5.5) forbidden[itsindex]=kTRUE;
3812 if (normdist[itsindex]<2 && bestConst->GetClIndex(0)>0 && bestConst->GetClIndex(1)>0 ) forbidden[itsindex]=kTRUE;
3813 if (normdist[itsindex]<1 && bestConst->GetClIndex(0)>0) forbidden[itsindex]=kTRUE;
3814 if (normdist[itsindex]<4 && bestConst->GetNormChi2(0)<2) forbidden[itsindex]=kTRUE;
3815 if (normdist[itsindex]<5 && bestConst->GetNormChi2(0)<1) forbidden[itsindex]=kTRUE;
3816 if (bestConst->GetNormChi2(0)<2.5) {
3817 minPointAngle[itsindex]= 0.9999;
3818 maxr[itsindex] = 10;
3822 //forbid daughter kink candidates
3824 if (esdtrack->GetKinkIndex(0)>0) forbidden[itsindex] = kTRUE;
3825 Bool_t isElectron = kTRUE;
3826 Bool_t isProton = kTRUE;
3828 esdtrack->GetESDpid(pid);
3829 for (Int_t i=1;i<5;i++){
3830 if (pid[0]<pid[i]) isElectron= kFALSE;
3831 if (pid[4]<pid[i]) isProton= kFALSE;
3834 forbidden[itsindex]=kFALSE;
3835 normdist[itsindex]*=-1;
3838 if (normdist[itsindex]>2) forbidden[itsindex]=kFALSE;
3839 normdist[itsindex]*=-1;
3843 // Causality cuts in TPC volume
3845 if (esdtrack->GetTPCdensity(0,10) >0.6) maxr[itsindex] = TMath::Min(Float_t(110),maxr[itsindex]);
3846 if (esdtrack->GetTPCdensity(10,30)>0.6) maxr[itsindex] = TMath::Min(Float_t(120),maxr[itsindex]);
3847 if (esdtrack->GetTPCdensity(20,40)>0.6) maxr[itsindex] = TMath::Min(Float_t(130),maxr[itsindex]);
3848 if (esdtrack->GetTPCdensity(30,50)>0.6) maxr[itsindex] = TMath::Min(Float_t(140),maxr[itsindex]);
3850 if (esdtrack->GetTPCdensity(0,60)<0.4&&bestLong->GetNumberOfClusters()<3) minr[itsindex]=100;
3856 "Tr1.="<<((bestConst)? bestConst:dummy)<<
3858 "Tr3.="<<&trackat0<<
3860 "Dist="<<dist[itsindex]<<
3861 "ND0="<<normdist0[itsindex]<<
3862 "ND1="<<normdist1[itsindex]<<
3863 "ND="<<normdist[itsindex]<<
3864 "Pz="<<primvertex[2]<<
3865 "Forbid="<<forbidden[itsindex]<<
3869 trackarray.AddAt(best,itsindex);
3870 trackarrayc.AddAt(bestConst,itsindex);
3871 trackarrayl.AddAt(bestLong,itsindex);
3872 new (&helixes[itsindex]) AliHelix(*best);
3877 // first iterration of V0 finder
3879 for (Int_t iesd0=0;iesd0<ntracks;iesd0++){
3880 Int_t itrack0 = itsmap[iesd0];
3881 if (forbidden[itrack0]) continue;
3882 AliITStrackMI * btrack0 = (AliITStrackMI*)trackarray.At(itrack0);
3883 if (!btrack0) continue;
3884 if (btrack0->GetSign()>0) continue;
3885 AliITStrackMI *trackc0 = (AliITStrackMI*)trackarrayc.At(itrack0);
3887 for (Int_t iesd1=0;iesd1<ntracks;iesd1++){
3888 Int_t itrack1 = itsmap[iesd1];
3889 if (forbidden[itrack1]) continue;
3891 AliITStrackMI * btrack1 = (AliITStrackMI*)trackarray.At(itrack1);
3892 if (!btrack1) continue;
3893 if (btrack1->GetSign()<0) continue;
3894 Bool_t isGold = kFALSE;
3895 if (TMath::Abs(TMath::Abs(btrack0->GetLabel())-TMath::Abs(btrack1->GetLabel()))==1){
3898 AliITStrackMI *trackc1 = (AliITStrackMI*)trackarrayc.At(itrack1);
3899 AliHelix &h1 = helixes[itrack0];
3900 AliHelix &h2 = helixes[itrack1];
3902 // find linear distance
3907 Double_t phase[2][2],radius[2];
3908 Int_t points = h1.GetRPHIintersections(h2, phase, radius);
3909 if (points==0) continue;
3910 Double_t delta[2]={1000000,1000000};
3912 h1.ParabolicDCA(h2,phase[0][0],phase[0][1],radius[0],delta[0]);
3914 if (radius[1]<rmin) rmin = radius[1];
3915 h1.ParabolicDCA(h2,phase[1][0],phase[1][1],radius[1],delta[1]);
3917 rmin = TMath::Sqrt(rmin);
3918 Double_t distance = 0;
3919 Double_t radiusC = 0;
3921 if (points==1 || delta[0]<delta[1]){
3922 distance = TMath::Sqrt(delta[0]);
3923 radiusC = TMath::Sqrt(radius[0]);
3925 distance = TMath::Sqrt(delta[1]);
3926 radiusC = TMath::Sqrt(radius[1]);
3929 if (radiusC<TMath::Max(minr[itrack0],minr[itrack1])) continue;
3930 if (radiusC>TMath::Min(maxr[itrack0],maxr[itrack1])) continue;
3931 Float_t maxDist = TMath::Min(kMaxDist,Float_t(kMaxDist0+radiusC*kMaxDist1));
3932 if (distance>maxDist) continue;
3933 Float_t pointAngle = h1.GetPointAngle(h2,phase[iphase],primvertex);
3934 if (pointAngle<TMath::Max(minPointAngle[itrack0],minPointAngle[itrack1])) continue;
3937 // Double_t distance = TestV0(h1,h2,pvertex,rmin);
3939 // if (distance>maxDist) continue;
3940 // if (pvertex->GetRr()<kMinR) continue;
3941 // if (pvertex->GetRr()>kMaxR) continue;
3942 AliITStrackMI * track0=btrack0;
3943 AliITStrackMI * track1=btrack1;
3944 // if (pvertex->GetRr()<3.5){
3946 //use longest tracks inside the pipe
3947 track0 = (AliITStrackMI*)trackarrayl.At(itrack0);
3948 track1 = (AliITStrackMI*)trackarrayl.At(itrack1);
3952 pvertex->SetParamN(*track0);
3953 pvertex->SetParamP(*track1);
3954 pvertex->Update(primvertex);
3955 pvertex->SetClusters(track0->ClIndex(),track1->ClIndex()); // register clusters
3957 if (pvertex->GetRr()<kMinR) continue;
3958 if (pvertex->GetRr()>kMaxR) continue;
3959 if (pvertex->GetV0CosineOfPointingAngle()<kMinPointAngle) continue;
3960 //Bo: if (pvertex->GetDist2()>maxDist) continue;
3961 if (pvertex->GetDcaV0Daughters()>maxDist) continue;
3962 //Bo: pvertex->SetLab(0,track0->GetLabel());
3963 //Bo: pvertex->SetLab(1,track1->GetLabel());
3964 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
3965 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
3967 AliITStrackMI * htrackc0 = trackc0 ? trackc0:dummy;
3968 AliITStrackMI * htrackc1 = trackc1 ? trackc1:dummy;
3972 TObjArray * array0b = (TObjArray*)fBestHypothesys.At(itrack0);
3973 if (!array0b&&pvertex->GetRr()<40 && TMath::Abs(track0->GetTgl())<1.1)
3974 FollowProlongationTree((AliITStrackMI*)fOriginal.At(itrack0),itrack0, kFALSE);
3975 TObjArray * array1b = (TObjArray*)fBestHypothesys.At(itrack1);
3976 if (!array1b&&pvertex->GetRr()<40 && TMath::Abs(track1->GetTgl())<1.1)
3977 FollowProlongationTree((AliITStrackMI*)fOriginal.At(itrack1),itrack1, kFALSE);
3979 AliITStrackMI * track0b = (AliITStrackMI*)fOriginal.At(itrack0);
3980 AliITStrackMI * track1b = (AliITStrackMI*)fOriginal.At(itrack1);
3981 AliITStrackMI * track0l = (AliITStrackMI*)fOriginal.At(itrack0);
3982 AliITStrackMI * track1l = (AliITStrackMI*)fOriginal.At(itrack1);
3984 Float_t minchi2before0=16;
3985 Float_t minchi2before1=16;
3986 Float_t minchi2after0 =16;
3987 Float_t minchi2after1 =16;
3988 Double_t xrp[3]; pvertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
3989 Int_t maxLayer = GetNearestLayer(xrp); //I.B.
3991 if (array0b) for (Int_t i=0;i<5;i++){
3992 // best track after vertex
3993 AliITStrackMI * btrack = (AliITStrackMI*)array0b->At(i);
3994 if (!btrack) continue;
3995 if (btrack->GetNumberOfClusters()>track0l->GetNumberOfClusters()) track0l = btrack;
3996 // if (btrack->fX<pvertex->GetRr()-2.-0.5/(0.1+pvertex->GetAnglep()[2])) {
3997 if (btrack->GetX()<pvertex->GetRr()-2.) {
3998 if ( (maxLayer>i+2|| (i==0)) && btrack->GetNumberOfClusters()==(6-i)&&i<3){
4001 if (maxLayer<3){ // take prim vertex as additional measurement
4002 if (normdist[itrack0]>0 && htrackc0){
4003 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack0]*normdist[itrack0],16.);
4005 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack0]*normdist[itrack0]+3.),16.);
4009 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
4011 if (!btrack->GetClIndex(ilayer)){
4015 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
4016 for (Int_t itrack=0;itrack<4;itrack++){
4017 if (fgLayers[ilayer].GetClusterTracks(itrack,c)>=0 && fgLayers[ilayer].GetClusterTracks(itrack,c)!=itrack0){
4018 sumchi2+=18.; //shared cluster
4022 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
4023 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
4027 if (sumchi2<minchi2before0) minchi2before0=sumchi2;
4029 continue; //safety space - Geo manager will give exact layer
4032 minchi2after0 = btrack->GetNormChi2(i);
4035 if (array1b) for (Int_t i=0;i<5;i++){
4036 // best track after vertex
4037 AliITStrackMI * btrack = (AliITStrackMI*)array1b->At(i);
4038 if (!btrack) continue;
4039 if (btrack->GetNumberOfClusters()>track1l->GetNumberOfClusters()) track1l = btrack;
4040 // if (btrack->fX<pvertex->GetRr()-2-0.5/(0.1+pvertex->GetAnglep()[2])){
4041 if (btrack->GetX()<pvertex->GetRr()-2){
4042 if ((maxLayer>i+2 || (i==0))&&btrack->GetNumberOfClusters()==(6-i)&&(i<3)){
4045 if (maxLayer<3){ // take prim vertex as additional measurement
4046 if (normdist[itrack1]>0 && htrackc1){
4047 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack1]*normdist[itrack1],16.);
4049 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack1]*normdist[itrack1]+3.),16.);
4053 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
4055 if (!btrack->GetClIndex(ilayer)){
4059 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
4060 for (Int_t itrack=0;itrack<4;itrack++){
4061 if (fgLayers[ilayer].GetClusterTracks(itrack,c)>=0 && fgLayers[ilayer].GetClusterTracks(itrack,c)!=itrack1){
4062 sumchi2+=18.; //shared cluster
4066 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
4067 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
4071 if (sumchi2<minchi2before1) minchi2before1=sumchi2;
4073 continue; //safety space - Geo manager will give exact layer
4076 minchi2after1 = btrack->GetNormChi2(i);
4080 // position resolution - used for DCA cut
4081 Float_t sigmad = track0b->GetSigmaY2()+track0b->GetSigmaZ2()+track1b->GetSigmaY2()+track1b->GetSigmaZ2()+
4082 (track0b->GetX()-pvertex->GetRr())*(track0b->GetX()-pvertex->GetRr())*(track0b->GetSigmaSnp2()+track0b->GetSigmaTgl2())+
4083 (track1b->GetX()-pvertex->GetRr())*(track1b->GetX()-pvertex->GetRr())*(track1b->GetSigmaSnp2()+track1b->GetSigmaTgl2());
4084 sigmad =TMath::Sqrt(sigmad)+0.04;
4085 if (pvertex->GetRr()>50){
4086 Double_t cov0[15],cov1[15];
4087 track0b->GetESDtrack()->GetInnerExternalCovariance(cov0);
4088 track1b->GetESDtrack()->GetInnerExternalCovariance(cov1);
4089 sigmad = cov0[0]+cov0[2]+cov1[0]+cov1[2]+
4090 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov0[5]+cov0[9])+
4091 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov1[5]+cov1[9]);
4092 sigmad =TMath::Sqrt(sigmad)+0.05;
4096 vertex2.SetParamN(*track0b);
4097 vertex2.SetParamP(*track1b);
4098 vertex2.Update(primvertex);
4099 //Bo: if (vertex2.GetDist2()<=pvertex->GetDist2()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
4100 if (vertex2.GetDcaV0Daughters()<=pvertex->GetDcaV0Daughters()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
4101 pvertex->SetParamN(*track0b);
4102 pvertex->SetParamP(*track1b);
4103 pvertex->Update(primvertex);
4104 pvertex->SetClusters(track0b->ClIndex(),track1b->ClIndex()); // register clusters
4105 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
4106 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
4108 pvertex->SetDistSigma(sigmad);
4109 //Bo: pvertex->SetDistNorm(pvertex->GetDist2()/sigmad);
4110 pvertex->SetNormDCAPrim(normdist[itrack0],normdist[itrack1]);
4112 // define likelihhod and causalities
4114 Float_t pa0=1, pa1=1, pb0=0.26, pb1=0.26;
4116 Float_t fnorm0 = normdist[itrack0];
4117 if (fnorm0<0) fnorm0*=-3;
4118 Float_t fnorm1 = normdist[itrack1];
4119 if (fnorm1<0) fnorm1*=-3;
4120 if (pvertex->GetAnglep()[2]>0.1 || (pvertex->GetRr()<10.5)&& pvertex->GetAnglep()[2]>0.05 || pvertex->GetRr()<3){
4121 pb0 = TMath::Exp(-TMath::Min(fnorm0,Float_t(16.))/12.);
4122 pb1 = TMath::Exp(-TMath::Min(fnorm1,Float_t(16.))/12.);
4124 pvertex->SetChi2Before(normdist[itrack0]);
4125 pvertex->SetChi2After(normdist[itrack1]);
4126 pvertex->SetNAfter(0);
4127 pvertex->SetNBefore(0);
4129 pvertex->SetChi2Before(minchi2before0);
4130 pvertex->SetChi2After(minchi2before1);
4131 if (pvertex->GetAnglep()[2]>0.1 || ( pvertex->GetRr()<10.5 && pvertex->GetAnglep()[2]>0.05) || pvertex->GetRr()<3){
4132 pb0 = TMath::Exp(-TMath::Min(minchi2before0,Float_t(16))/12.);
4133 pb1 = TMath::Exp(-TMath::Min(minchi2before1,Float_t(16))/12.);
4135 pvertex->SetNAfter(maxLayer);
4136 pvertex->SetNBefore(maxLayer);
4138 if (pvertex->GetRr()<90){
4139 pa0 *= TMath::Min(track0->GetESDtrack()->GetTPCdensity(0,60),Float_t(1.));
4140 pa1 *= TMath::Min(track1->GetESDtrack()->GetTPCdensity(0,60),Float_t(1.));
4142 if (pvertex->GetRr()<20){
4143 pa0 *= (0.2+TMath::Exp(-TMath::Min(minchi2after0,Float_t(16))/8.))/1.2;
4144 pa1 *= (0.2+TMath::Exp(-TMath::Min(minchi2after1,Float_t(16))/8.))/1.2;
4147 pvertex->SetCausality(pb0,pb1,pa0,pa1);
4149 // Likelihood calculations - apply cuts
4151 Bool_t v0OK = kTRUE;
4152 Float_t p12 = pvertex->GetParamP()->GetParameter()[4]*pvertex->GetParamP()->GetParameter()[4];
4153 p12 += pvertex->GetParamN()->GetParameter()[4]*pvertex->GetParamN()->GetParameter()[4];
4154 p12 = TMath::Sqrt(p12); // "mean" momenta
4155 Float_t sigmap0 = 0.0001+0.001/(0.1+pvertex->GetRr());
4156 Float_t sigmap = 0.5*sigmap0*(0.6+0.4*p12); // "resolution: of point angle - as a function of radius and momenta
4158 Float_t causalityA = (1.0-pvertex->GetCausalityP()[0])*(1.0-pvertex->GetCausalityP()[1]);
4159 Float_t causalityB = TMath::Sqrt(TMath::Min(pvertex->GetCausalityP()[2],Float_t(0.7))*
4160 TMath::Min(pvertex->GetCausalityP()[3],Float_t(0.7)));
4162 //Bo: Float_t likelihood0 = (TMath::Exp(-pvertex->GetDistNorm())+0.1) *(pvertex->GetDist2()<0.5)*(pvertex->GetDistNorm()<5);
4163 Float_t lDistNorm = pvertex->GetDcaV0Daughters()/pvertex->GetDistSigma();
4164 Float_t likelihood0 = (TMath::Exp(-lDistNorm)+0.1) *(pvertex->GetDcaV0Daughters()<0.5)*(lDistNorm<5);
4166 Float_t likelihood1 = TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/sigmap)+
4167 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(4.*sigmap))+
4168 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(8.*sigmap))+
4169 0.1*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/0.01);
4171 if (causalityA<kCausality0Cut) v0OK = kFALSE;
4172 if (TMath::Sqrt(likelihood0*likelihood1)<kLikelihood01Cut) v0OK = kFALSE;
4173 if (likelihood1<kLikelihood1Cut) v0OK = kFALSE;
4174 if (TMath::Power(likelihood0*likelihood1*causalityB,0.33)<kCombinedCut) v0OK = kFALSE;
4179 Bool_t gold = TMath::Abs(TMath::Abs(track0->GetLabel())-TMath::Abs(track1->GetLabel()))==1;
4181 "Tr0.="<<track0<< //best without constrain
4182 "Tr1.="<<track1<< //best without constrain
4183 "Tr0B.="<<track0b<< //best without constrain after vertex
4184 "Tr1B.="<<track1b<< //best without constrain after vertex
4185 "Tr0C.="<<htrackc0<< //best with constrain if exist
4186 "Tr1C.="<<htrackc1<< //best with constrain if exist
4187 "Tr0L.="<<track0l<< //longest best
4188 "Tr1L.="<<track1l<< //longest best
4189 "Esd0.="<<track0->GetESDtrack()<< // esd track0 params
4190 "Esd1.="<<track1->GetESDtrack()<< // esd track1 params
4191 "V0.="<<pvertex<< //vertex properties
4192 "V0b.="<<&vertex2<< //vertex properties at "best" track
4193 "ND0="<<normdist[itrack0]<< //normalize distance for track0
4194 "ND1="<<normdist[itrack1]<< //normalize distance for track1
4196 // "RejectBase="<<rejectBase<< //rejection in First itteration
4202 //if (rejectBase) continue;
4204 pvertex->SetStatus(0);
4205 // if (rejectBase) {
4206 // pvertex->SetStatus(-100);
4208 if (pvertex->GetV0CosineOfPointingAngle()>kMinPointAngle2) {
4209 //Bo: pvertex->SetESDindexes(track0->GetESDtrack()->GetID(),track1->GetESDtrack()->GetID());
4210 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());//Bo: consistency 0 for neg
4211 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());//Bo: consistency 1 for pos
4213 // AliV0vertex vertexjuri(*track0,*track1);
4214 // vertexjuri.SetESDindexes(track0->fESDtrack->GetID(),track1->fESDtrack->GetID());
4215 // event->AddV0(&vertexjuri);
4216 pvertex->SetStatus(100);
4218 pvertex->SetOnFlyStatus(kTRUE);
4219 pvertex->ChangeMassHypothesis(kK0Short);
4220 event->AddV0(pvertex);
4226 // delete temporary arrays
4228 delete[] minPointAngle;
4240 //------------------------------------------------------------------------
4241 void AliITStrackerMI::RefitV02(AliESDEvent *event)
4244 //try to refit V0s in the third path of the reconstruction
4246 TTreeSRedirector &cstream = *fDebugStreamer;
4248 Int_t nv0s = event->GetNumberOfV0s();
4249 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
4251 for (Int_t iv0 = 0; iv0<nv0s;iv0++){
4252 AliV0 * v0mi = (AliV0*)event->GetV0(iv0);
4253 if (!v0mi) continue;
4254 Int_t itrack0 = v0mi->GetIndex(0);
4255 Int_t itrack1 = v0mi->GetIndex(1);
4256 AliESDtrack *esd0 = event->GetTrack(itrack0);
4257 AliESDtrack *esd1 = event->GetTrack(itrack1);
4258 if (!esd0||!esd1) continue;
4259 AliITStrackMI tpc0(*esd0);
4260 AliITStrackMI tpc1(*esd1);
4261 Double_t x,y,z; v0mi->GetXYZ(x,y,z); //I.B.
4262 Double_t alpha =TMath::ATan2(y,x); //I.B.
4263 if (v0mi->GetRr()>85){
4264 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
4265 v0temp.SetParamN(tpc0);
4266 v0temp.SetParamP(tpc1);
4267 v0temp.Update(primvertex);
4268 if (kFALSE) cstream<<"Refit"<<
4270 "V0refit.="<<&v0temp<<
4274 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4275 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4276 v0mi->SetParamN(tpc0);
4277 v0mi->SetParamP(tpc1);
4278 v0mi->Update(primvertex);
4283 if (v0mi->GetRr()>35){
4284 CorrectForDeadZoneMaterial(&tpc0);
4285 CorrectForDeadZoneMaterial(&tpc1);
4286 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
4287 v0temp.SetParamN(tpc0);
4288 v0temp.SetParamP(tpc1);
4289 v0temp.Update(primvertex);
4290 if (kFALSE) cstream<<"Refit"<<
4292 "V0refit.="<<&v0temp<<
4296 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4297 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4298 v0mi->SetParamN(tpc0);
4299 v0mi->SetParamP(tpc1);
4300 v0mi->Update(primvertex);
4305 CorrectForDeadZoneMaterial(&tpc0);
4306 CorrectForDeadZoneMaterial(&tpc1);
4307 // if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
4308 if (RefitAt(v0mi->GetRr(),&tpc0, v0mi->GetClusters(0)) && RefitAt(v0mi->GetRr(),&tpc1, v0mi->GetClusters(1))){
4309 v0temp.SetParamN(tpc0);
4310 v0temp.SetParamP(tpc1);
4311 v0temp.Update(primvertex);
4312 if (kFALSE) cstream<<"Refit"<<
4314 "V0refit.="<<&v0temp<<
4318 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4319 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4320 v0mi->SetParamN(tpc0);
4321 v0mi->SetParamP(tpc1);
4322 v0mi->Update(primvertex);
4327 //------------------------------------------------------------------------