1 /**************************************************************************
2 * Copyright(c) 2007-2009, 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 **************************************************************************/
17 //-------------------------------------------------------------------------
18 // Implementation of the ITS tracker class
19 // It reads AliITSRecPoint clusters and creates AliITStrackMI tracks
20 // and fills with them the ESD
21 // Origin: Marian Ivanov, CERN, Marian.Ivanov@cern.ch
22 // dE/dx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
23 // Params moved to AliITSRecoParam by: Andrea Dainese, INFN
24 // Material budget from TGeo by: Ludovic Gaudichet & Andrea Dainese, INFN
25 //-------------------------------------------------------------------------
29 #include <TTreeStream.h>
31 #include <TDatabasePDG.h>
35 #include "AliESDEvent.h"
36 #include "AliESDtrack.h"
37 #include "AliESDVertex.h"
40 #include "AliITSRecPoint.h"
41 #include "AliITSgeomTGeo.h"
42 #include "AliITStrackerMI.h"
43 #include "AliITSReconstructor.h"
44 #include "AliTrackPointArray.h"
45 #include "AliAlignObj.h"
47 ClassImp(AliITStrackerMI)
51 AliITStrackerMI::AliITSlayer AliITStrackerMI::fgLayers[kMaxLayer]; // ITS layers
53 AliITStrackerMI::AliITStrackerMI():AliTracker(),
63 fLastLayerToTrackTo(0),
69 for(Int_t i=0;i<4;i++) fSPDdetzcentre[i]=0.;
71 //------------------------------------------------------------------------
72 AliITStrackerMI::AliITStrackerMI(const Char_t *geom) : AliTracker(),
82 fLastLayerToTrackTo(kLastLayerToTrackTo),
87 //--------------------------------------------------------------------
88 //This is the AliITStrackerMI constructor
89 //--------------------------------------------------------------------
91 AliWarning("\"geom\" is actually a dummy argument !");
97 for (Int_t i=1; i<kMaxLayer+1; i++) {
98 Int_t nlad=AliITSgeomTGeo::GetNLadders(i);
99 Int_t ndet=AliITSgeomTGeo::GetNDetectors(i);
101 Double_t xyz[3], &x=xyz[0], &y=xyz[1], &z=xyz[2];
102 AliITSgeomTGeo::GetOrigTranslation(i,1,1,xyz);
103 Double_t poff=TMath::ATan2(y,x);
105 Double_t r=TMath::Sqrt(x*x + y*y);
107 AliITSgeomTGeo::GetOrigTranslation(i,1,2,xyz);
108 r += TMath::Sqrt(x*x + y*y);
109 AliITSgeomTGeo::GetOrigTranslation(i,2,1,xyz);
110 r += TMath::Sqrt(x*x + y*y);
111 AliITSgeomTGeo::GetOrigTranslation(i,2,2,xyz);
112 r += TMath::Sqrt(x*x + y*y);
115 new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet);
117 for (Int_t j=1; j<nlad+1; j++) {
118 for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors
119 TGeoHMatrix m; AliITSgeomTGeo::GetOrigMatrix(i,j,k,m);
120 const TGeoHMatrix *tm=AliITSgeomTGeo::GetTracking2LocalMatrix(i,j,k);
122 Double_t txyz[3]={0.}, xyz[3]={0.};
123 m.LocalToMaster(txyz,xyz);
124 Double_t r=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
125 Double_t phi=TMath::ATan2(xyz[1],xyz[0]);
127 if (phi<0) phi+=TMath::TwoPi();
128 else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi();
130 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
131 new(&det) AliITSdetector(r,phi);
140 fConstraint[0]=1; fConstraint[1]=0;
142 Double_t xyzVtx[]={AliITSReconstructor::GetRecoParam()->GetXVdef(),
143 AliITSReconstructor::GetRecoParam()->GetYVdef(),
144 AliITSReconstructor::GetRecoParam()->GetZVdef()};
145 Double_t ersVtx[]={AliITSReconstructor::GetRecoParam()->GetSigmaXVdef(),
146 AliITSReconstructor::GetRecoParam()->GetSigmaYVdef(),
147 AliITSReconstructor::GetRecoParam()->GetSigmaZVdef()};
148 SetVertex(xyzVtx,ersVtx);
150 for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=kLayersNotToSkip[i];
151 fLastLayerToTrackTo=kLastLayerToTrackTo;
152 for (Int_t i=0;i<100000;i++){
153 fBestTrackIndex[i]=0;
156 // store positions of centre of SPD modules (in z)
158 AliITSgeomTGeo::GetTranslation(1,1,1,tr);
159 fSPDdetzcentre[0] = tr[2];
160 AliITSgeomTGeo::GetTranslation(1,1,2,tr);
161 fSPDdetzcentre[1] = tr[2];
162 AliITSgeomTGeo::GetTranslation(1,1,3,tr);
163 fSPDdetzcentre[2] = tr[2];
164 AliITSgeomTGeo::GetTranslation(1,1,4,tr);
165 fSPDdetzcentre[3] = tr[2];
168 fUseTGeo = AliITSReconstructor::GetRecoParam()->GetUseTGeoInTracker();
170 fDebugStreamer = new TTreeSRedirector("ITSdebug.root");
173 //------------------------------------------------------------------------
174 AliITStrackerMI::AliITStrackerMI(const AliITStrackerMI &tracker):AliTracker(tracker),
176 fBestTrack(tracker.fBestTrack),
177 fTrackToFollow(tracker.fTrackToFollow),
178 fTrackHypothesys(tracker.fTrackHypothesys),
179 fBestHypothesys(tracker.fBestHypothesys),
180 fOriginal(tracker.fOriginal),
181 fCurrentEsdTrack(tracker.fCurrentEsdTrack),
182 fPass(tracker.fPass),
183 fAfterV0(tracker.fAfterV0),
184 fLastLayerToTrackTo(tracker.fLastLayerToTrackTo),
185 fCoefficients(tracker.fCoefficients),
187 fUseTGeo(tracker.fUseTGeo),
188 fDebugStreamer(tracker.fDebugStreamer){
191 //------------------------------------------------------------------------
192 AliITStrackerMI & AliITStrackerMI::operator=(const AliITStrackerMI &tracker){
193 //Assignment operator
194 this->~AliITStrackerMI();
195 new(this) AliITStrackerMI(tracker);
198 //------------------------------------------------------------------------
199 AliITStrackerMI::~AliITStrackerMI()
204 if (fCoefficients) delete []fCoefficients;
205 if (fDebugStreamer) {
206 //fDebugStreamer->Close();
207 delete fDebugStreamer;
210 //------------------------------------------------------------------------
211 void AliITStrackerMI::SetLayersNotToSkip(Int_t *l) {
212 //--------------------------------------------------------------------
213 //This function set masks of the layers which must be not skipped
214 //--------------------------------------------------------------------
215 for (Int_t i=0; i<kMaxLayer; i++) fLayersNotToSkip[i]=l[i];
217 //------------------------------------------------------------------------
218 Int_t AliITStrackerMI::LoadClusters(TTree *cTree) {
219 //--------------------------------------------------------------------
220 //This function loads ITS clusters
221 //--------------------------------------------------------------------
222 TBranch *branch=cTree->GetBranch("ITSRecPoints");
224 Error("LoadClusters"," can't get the branch !\n");
228 TClonesArray dummy("AliITSRecPoint",10000), *clusters=&dummy;
229 branch->SetAddress(&clusters);
233 for (Int_t i=0; i<kMaxLayer; i++) {
234 Int_t ndet=fgLayers[i].GetNdetectors();
235 Int_t jmax = j + fgLayers[i].GetNladders()*ndet;
236 for (; j<jmax; j++) {
237 if (!cTree->GetEvent(j)) continue;
238 Int_t ncl=clusters->GetEntriesFast();
239 SignDeltas(clusters,GetZ());
242 AliITSRecPoint *c=(AliITSRecPoint*)clusters->UncheckedAt(ncl);
243 detector=c->GetDetectorIndex();
245 if (!c->Misalign()) AliWarning("Can't misalign this cluster !");
247 fgLayers[i].InsertCluster(new AliITSRecPoint(*c));
250 // add dead zone "virtual" cluster in SPD, if there is a cluster within
251 // zwindow cm from the dead zone
252 if (i<2 && AliITSReconstructor::GetRecoParam()->GetAddVirtualClustersInDeadZone()) {
253 for (Float_t xdead = 0; xdead < kSPDdetxlength; xdead += (i+1.)*AliITSReconstructor::GetRecoParam()->GetXPassDeadZoneHits()) {
254 Int_t lab[4] = {0,0,0,detector};
255 Int_t info[3] = {0,0,i};
257 Float_t hit[5] = {xdead,
259 AliITSReconstructor::GetRecoParam()->GetSigmaXDeadZoneHit2(),
260 AliITSReconstructor::GetRecoParam()->GetSigmaZDeadZoneHit2(),
262 Bool_t local = kTRUE;
263 Double_t zwindow = AliITSReconstructor::GetRecoParam()->GetZWindowDeadZone();
264 hit[1] = fSPDdetzcentre[0]+0.5*kSPDdetzlength;
265 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
266 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
267 hit[1] = fSPDdetzcentre[1]-0.5*kSPDdetzlength;
268 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
269 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
270 hit[1] = fSPDdetzcentre[1]+0.5*kSPDdetzlength;
271 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
272 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
273 hit[1] = fSPDdetzcentre[2]-0.5*kSPDdetzlength;
274 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
275 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
276 hit[1] = fSPDdetzcentre[2]+0.5*kSPDdetzlength;
277 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
278 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
279 hit[1] = fSPDdetzcentre[3]-0.5*kSPDdetzlength;
280 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
281 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
287 fgLayers[i].ResetRoad(); //road defined by the cluster density
288 fgLayers[i].SortClusters();
293 //------------------------------------------------------------------------
294 void AliITStrackerMI::UnloadClusters() {
295 //--------------------------------------------------------------------
296 //This function unloads ITS clusters
297 //--------------------------------------------------------------------
298 for (Int_t i=0; i<kMaxLayer; i++) fgLayers[i].ResetClusters();
300 //------------------------------------------------------------------------
301 static Int_t CorrectForTPCtoITSDeadZoneMaterial(AliITStrackMI *t) {
302 //--------------------------------------------------------------------
303 // Correction for the material between the TPC and the ITS
304 //--------------------------------------------------------------------
305 if (t->GetX() > kriw) { // inward direction
306 if (!t->PropagateToTGeo(kriw,1)) return 1;// TPC inner wall
307 if (!t->PropagateToTGeo(krcd,1)) return 1;// TPC central drum
308 if (!t->PropagateToTGeo(krs,1)) return 1;// ITS screen
310 if (!t->PropagateTo(kriw,kdiw,kX0iw)) return 1;// TPC inner wall
311 if (TMath::Abs(t->GetY())>kyr) t->CorrectForMaterial(kdr);//rods
312 if (TMath::Abs(t->GetZ())<kzm) t->CorrectForMaterial(kdm);//membrane
313 if (!t->PropagateTo(krcd,kdcd,kX0cd)) return 1;// TPC central drum
314 //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z);
315 //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,dr,x0r);
316 if (!t->PropagateTo(krs,kds,kX0Air)) return 1;// ITS screen */
317 } else if (t->GetX() < krs) { // outward direction
318 if (!t->PropagateToTGeo(krs,1)) return 1;// ITS screen
319 if (!t->PropagateToTGeo(krcd,1)) return 1;// TPC central drum
320 if (!t->PropagateToTGeo(kriw+0.001,1)) return 1;// TPC inner wall
322 if (!t->PropagateTo(krs,-kds,kX0Air)) return 1;
323 //Double_t x,y,z; t->GetGlobalXYZat(rr,x,y,z);
324 //if (TMath::Abs(y)<yyr) t->PropagateTo(rr,-dr,x0r);
325 if (!t->PropagateTo(krcd,-kdcd,kX0cd)) return 1;// TPC central drum
326 if (!t->PropagateTo(kriw+0.001,-kdiw,kX0iw)) return 1; */
328 Error("CorrectForTPCtoITSDeadZoneMaterial","Track is already in the dead zone !");
334 //------------------------------------------------------------------------
335 Int_t AliITStrackerMI::Clusters2Tracks(AliESDEvent *event) {
336 //--------------------------------------------------------------------
337 // This functions reconstructs ITS tracks
338 // The clusters must be already loaded !
339 //--------------------------------------------------------------------
340 TObjArray itsTracks(15000);
342 fEsd = event; // store pointer to the esd
344 // temporary (for cosmics)
345 if(event->GetVertex()) {
346 TString title = event->GetVertex()->GetTitle();
347 if(title.Contains("cosmics")) {
348 Double_t xyz[3]={GetX(),GetY(),GetZ()};
349 Double_t exyz[3]={0.1,0.1,0.1};
355 {/* Read ESD tracks */
356 Double_t pimass = TDatabasePDG::Instance()->GetParticle(211)->Mass();
357 Int_t nentr=event->GetNumberOfTracks();
358 Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr);
360 AliESDtrack *esd=event->GetTrack(nentr);
362 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue;
363 if (esd->GetStatus()&AliESDtrack::kTPCout) continue;
364 if (esd->GetStatus()&AliESDtrack::kITSin) continue;
365 if (esd->GetKinkIndex(0)>0) continue; //kink daughter
368 t=new AliITStrackMI(*esd);
369 } catch (const Char_t *msg) {
370 //Warning("Clusters2Tracks",msg);
374 t->GetDZ(GetX(),GetY(),GetZ(),t->GetDP()); //I.B.
375 Double_t vdist = TMath::Sqrt(t->GetD(0)*t->GetD(0)+t->GetD(1)*t->GetD(1));
376 // look at the ESD mass hypothesys !
377 if (t->GetMass()<0.9*pimass) t->SetMass(pimass);
379 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
381 if (esd->GetV0Index(0)>0 && t->GetD(0)<AliITSReconstructor::GetRecoParam()->GetMaxDforV0dghtrForProlongation()){
382 //track - can be V0 according to TPC
384 if (TMath::Abs(t->GetD(0))>AliITSReconstructor::GetRecoParam()->GetMaxDForProlongation()) {
389 if (TMath::Abs(vdist)>AliITSReconstructor::GetRecoParam()->GetMaxDZForProlongation()) {
393 if (t->Pt()<AliITSReconstructor::GetRecoParam()->GetMinPtForProlongation()) {
398 if (CorrectForTPCtoITSDeadZoneMaterial(t)!=0) {
399 //Warning("Clusters2Tracks",
400 // "failed to correct for the material in the dead zone !\n");
405 t->SetReconstructed(kFALSE);
406 itsTracks.AddLast(t);
407 fOriginal.AddLast(t);
409 } /* End Read ESD tracks */
413 Int_t nentr=itsTracks.GetEntriesFast();
414 fTrackHypothesys.Expand(nentr);
415 fBestHypothesys.Expand(nentr);
416 MakeCoefficients(nentr);
418 // THE TWO TRACKING PASSES
419 for (fPass=0; fPass<2; fPass++) {
420 Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
421 for (Int_t i=0; i<nentr; i++) {
422 //cerr<<fPass<<" "<<i<<'\r';
423 fCurrentEsdTrack = i;
424 AliITStrackMI *t=(AliITStrackMI*)itsTracks.UncheckedAt(i);
425 if (t==0) continue; //this track has been already tracked
426 if (t->GetReconstructed()&&(t->GetNUsed()<1.5)) continue; //this track was already "succesfully" reconstructed
427 Float_t dz[2]; t->GetDZ(GetX(),GetY(),GetZ(),dz); //I.B.
428 if (fConstraint[fPass]) {
429 if (TMath::Abs(dz[0])>AliITSReconstructor::GetRecoParam()->GetMaxDZToUseConstraint() ||
430 TMath::Abs(dz[1])>AliITSReconstructor::GetRecoParam()->GetMaxDZToUseConstraint()) continue;
433 Int_t tpcLabel=t->GetLabel(); //save the TPC track label
435 ResetTrackToFollow(*t);
437 FollowProlongationTree(t,i,fConstraint[fPass]);
439 SortTrackHypothesys(fCurrentEsdTrack,20,0); //MI change
441 AliITStrackMI * besttrack = GetBestHypothesys(fCurrentEsdTrack,t,15);
442 if (!besttrack) continue;
443 besttrack->SetLabel(tpcLabel);
444 // besttrack->CookdEdx();
446 besttrack->SetFakeRatio(1.);
447 CookLabel(besttrack,0.); //For comparison only
448 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
450 if (fConstraint[fPass]&&(!besttrack->IsGoldPrimary())) continue; //to be tracked also without vertex constrain
452 t->SetReconstructed(kTRUE);
455 GetBestHypothesysMIP(itsTracks);
456 } // end loop on the two tracking passes
458 //GetBestHypothesysMIP(itsTracks);
459 if(event->GetNumberOfV0s()>0) UpdateTPCV0(event);
460 if(AliITSReconstructor::GetRecoParam()->GetFindV0s()) FindV02(event);
462 //GetBestHypothesysMIP(itsTracks);
466 Int_t entries = fTrackHypothesys.GetEntriesFast();
467 for (Int_t ientry=0;ientry<entries;ientry++){
468 TObjArray * array =(TObjArray*)fTrackHypothesys.UncheckedAt(ientry);
469 if (array) array->Delete();
470 delete fTrackHypothesys.RemoveAt(ientry);
473 fTrackHypothesys.Delete();
474 fBestHypothesys.Delete();
476 delete [] fCoefficients;
478 Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk);
482 //------------------------------------------------------------------------
483 Int_t AliITStrackerMI::PropagateBack(AliESDEvent *event) {
484 //--------------------------------------------------------------------
485 // This functions propagates reconstructed ITS tracks back
486 // The clusters must be loaded !
487 //--------------------------------------------------------------------
488 Int_t nentr=event->GetNumberOfTracks();
489 Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
492 for (Int_t i=0; i<nentr; i++) {
493 AliESDtrack *esd=event->GetTrack(i);
495 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
496 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
500 t=new AliITStrackMI(*esd);
501 } catch (const Char_t *msg) {
502 //Warning("PropagateBack",msg);
506 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
508 ResetTrackToFollow(*t);
510 // propagate to vertex [SR, GSI 17.02.2003]
511 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
513 if (fTrackToFollow.PropagateToTGeo(krInsidePipe,1)) {
514 if (fTrackToFollow.PropagateToVertex(event->GetVertex())) {
515 fTrackToFollow.StartTimeIntegral();
517 fTrackToFollow.PropagateToTGeo(krOutsidePipe,1);
520 if (fTrackToFollow.PropagateTo(krInsidePipe,kdPipe,kX0Be)) {
521 if (fTrackToFollow.PropagateToVertex(event->GetVertex())) {
522 fTrackToFollow.StartTimeIntegral();
524 fTrackToFollow.PropagateTo(krOutsidePipe,-kdPipe,kX0Be);
528 fTrackToFollow.ResetCovariance(10.); fTrackToFollow.ResetClusters();
529 if (RefitAt(krInsideITSscreen,&fTrackToFollow,t)) {
530 if (CorrectForTPCtoITSDeadZoneMaterial(&fTrackToFollow)!=0) {
531 //Warning("PropagateBack",
532 // "failed to correct for the material in the dead zone !\n");
536 fTrackToFollow.SetLabel(t->GetLabel());
537 //fTrackToFollow.CookdEdx();
538 CookLabel(&fTrackToFollow,0.); //For comparison only
539 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
540 //UseClusters(&fTrackToFollow);
546 Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk);
550 //------------------------------------------------------------------------
551 Int_t AliITStrackerMI::RefitInward(AliESDEvent *event) {
552 //--------------------------------------------------------------------
553 // This functions refits ITS tracks using the
554 // "inward propagated" TPC tracks
555 // The clusters must be loaded !
556 //--------------------------------------------------------------------
557 if(AliITSReconstructor::GetRecoParam()->GetFindV0s()) RefitV02(event);
558 Int_t nentr=event->GetNumberOfTracks();
559 Info("RefitInward", "Number of ESD tracks: %d\n", nentr);
562 for (Int_t i=0; i<nentr; i++) {
563 AliESDtrack *esd=event->GetTrack(i);
565 if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
566 if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
567 if (esd->GetStatus()&AliESDtrack::kTPCout)
568 if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
572 t=new AliITStrackMI(*esd);
573 } catch (const Char_t *msg) {
574 //Warning("RefitInward",msg);
578 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
579 if (CorrectForTPCtoITSDeadZoneMaterial(t)!=0) {
580 //Warning("RefitInward",
581 // "failed to correct for the material in the dead zone !\n");
586 ResetTrackToFollow(*t);
587 fTrackToFollow.ResetClusters();
589 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
590 fTrackToFollow.ResetCovariance(10.);
593 if (RefitAt(krInsideSPD1, &fTrackToFollow, t,kTRUE)) {
594 fTrackToFollow.SetLabel(t->GetLabel());
595 // fTrackToFollow.CookdEdx();
596 CookdEdx(&fTrackToFollow);
598 CookLabel(&fTrackToFollow,0.0); //For comparison only
603 okToPipe = fTrackToFollow.PropagateToTGeo(krInsidePipe,1);
605 okToPipe = fTrackToFollow.PropagateTo(krInsidePipe,kdPipe,kX0Be);
608 AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack();
609 esdTrack->UpdateTrackParams(&fTrackToFollow,AliESDtrack::kITSrefit);
610 Float_t r[3]={0.,0.,0.};
612 esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD);
620 Info("RefitInward","Number of refitted tracks: %d\n",ntrk);
624 //------------------------------------------------------------------------
625 AliCluster *AliITStrackerMI::GetCluster(Int_t index) const {
626 //--------------------------------------------------------------------
627 // Return pointer to a given cluster
628 //--------------------------------------------------------------------
629 Int_t l=(index & 0xf0000000) >> 28;
630 Int_t c=(index & 0x0fffffff) >> 00;
631 return fgLayers[l].GetCluster(c);
633 //------------------------------------------------------------------------
634 Bool_t AliITStrackerMI::GetTrackPoint(Int_t index, AliTrackPoint& p) const {
635 //--------------------------------------------------------------------
636 // Get track space point with index i
637 //--------------------------------------------------------------------
639 Int_t l=(index & 0xf0000000) >> 28;
640 Int_t c=(index & 0x0fffffff) >> 00;
641 AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
642 Int_t idet = cl->GetDetectorIndex();
646 cl->GetGlobalXYZ(xyz);
647 cl->GetGlobalCov(cov);
650 AliGeomManager::ELayerID iLayer = AliGeomManager::kInvalidLayer;
653 iLayer = AliGeomManager::kSPD1;
656 iLayer = AliGeomManager::kSPD2;
659 iLayer = AliGeomManager::kSDD1;
662 iLayer = AliGeomManager::kSDD2;
665 iLayer = AliGeomManager::kSSD1;
668 iLayer = AliGeomManager::kSSD2;
671 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
674 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,idet);
675 p.SetVolumeID((UShort_t)volid);
678 //------------------------------------------------------------------------
679 Bool_t AliITStrackerMI::GetTrackPointTrackingError(Int_t index,
680 AliTrackPoint& p, const AliESDtrack *t) {
681 //--------------------------------------------------------------------
682 // Get track space point with index i
683 // (assign error estimated during the tracking)
684 //--------------------------------------------------------------------
686 Int_t l=(index & 0xf0000000) >> 28;
687 Int_t c=(index & 0x0fffffff) >> 00;
688 const AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
689 Int_t idet = cl->GetDetectorIndex();
690 const AliITSdetector &det=fgLayers[l].GetDetector(idet);
692 // tgphi and tglambda of the track in tracking frame with alpha=det.GetPhi
694 detxy[0] = det.GetR()*TMath::Cos(det.GetPhi());
695 detxy[1] = det.GetR()*TMath::Sin(det.GetPhi());
696 Double_t alpha = t->GetAlpha();
697 Double_t xdetintrackframe = detxy[0]*TMath::Cos(alpha)+detxy[1]*TMath::Sin(alpha);
698 Float_t phi = TMath::ASin(t->GetSnpAt(xdetintrackframe,AliTracker::GetBz()));
699 phi += alpha-det.GetPhi();
700 Float_t tgphi = TMath::Tan(phi);
702 Float_t tgl = t->GetTgl(); // tgl about const along track
703 Float_t expQ = TMath::Max(0.8*t->GetTPCsignal(),30.);
705 Float_t errlocalx,errlocalz;
706 GetError(l,cl,tgl,tgphi,expQ,errlocalx,errlocalz);
711 cl->GetGlobalXYZ(xyz);
712 // cl->GetGlobalCov(cov);
713 Float_t pos[3] = {0.,0.,0.};
714 AliCluster tmpcl((UShort_t)cl->GetVolumeId(),pos[0],pos[1],pos[2],errlocalx*errlocalx,errlocalz*errlocalz,0);
715 tmpcl.GetGlobalCov(cov);
719 AliGeomManager::ELayerID iLayer = AliGeomManager::kInvalidLayer;
722 iLayer = AliGeomManager::kSPD1;
725 iLayer = AliGeomManager::kSPD2;
728 iLayer = AliGeomManager::kSDD1;
731 iLayer = AliGeomManager::kSDD2;
734 iLayer = AliGeomManager::kSSD1;
737 iLayer = AliGeomManager::kSSD2;
740 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
743 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,idet);
744 p.SetVolumeID((UShort_t)volid);
747 //------------------------------------------------------------------------
748 void AliITStrackerMI::FollowProlongationTree(AliITStrackMI * otrack, Int_t esdindex, Bool_t constrain)
750 //--------------------------------------------------------------------
751 // Follow prolongation tree
752 //--------------------------------------------------------------------
754 Double_t xyzVtx[]={GetX(),GetY(),GetZ()};
755 Double_t ersVtx[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
757 AliESDtrack * esd = otrack->GetESDtrack();
758 if (esd->GetV0Index(0)>0) {
759 // TEMPORARY SOLLUTION: map V0 indexes to point to proper track
760 // mapping of ESD track is different as ITS track in Containers
761 // Need something more stable
762 // Indexes are set back again to the ESD track indexes in UpdateTPCV0
763 for (Int_t i=0;i<3;i++){
764 Int_t index = esd->GetV0Index(i);
766 AliESDv0 * vertex = fEsd->GetV0(index);
767 if (vertex->GetStatus()<0) continue; // rejected V0
769 if (esd->GetSign()>0) {
770 vertex->SetIndex(0,esdindex);
772 vertex->SetIndex(1,esdindex);
776 TObjArray *bestarray = (TObjArray*)fBestHypothesys.At(esdindex);
778 bestarray = new TObjArray(5);
779 fBestHypothesys.AddAt(bestarray,esdindex);
783 //setup tree of the prolongations
785 static AliITStrackMI tracks[7][100];
786 AliITStrackMI *currenttrack;
787 static AliITStrackMI currenttrack1;
788 static AliITStrackMI currenttrack2;
789 static AliITStrackMI backuptrack;
791 Int_t nindexes[7][100];
792 Float_t normalizedchi2[100];
793 for (Int_t ilayer=0;ilayer<6;ilayer++) ntracks[ilayer]=0;
794 otrack->SetNSkipped(0);
795 new (&(tracks[6][0])) AliITStrackMI(*otrack);
797 for (Int_t i=0;i<7;i++) nindexes[i][0]=0;
800 // follow prolongations
801 for (Int_t ilayer=5;ilayer>=0;ilayer--){
803 AliITSlayer &layer=fgLayers[ilayer];
804 Double_t r=layer.GetR();
810 for (Int_t itrack =0;itrack<ntracks[ilayer+1];itrack++){
812 if (ntracks[ilayer]>=100) break;
813 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0) nskipped++;
814 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2.) nused++;
815 if (ntracks[ilayer]>15+ilayer){
816 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0 && nskipped>4+ilayer) continue;
817 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2. && nused>3) continue;
820 new(¤ttrack1) AliITStrackMI(tracks[ilayer+1][nindexes[ilayer+1][itrack]]);
822 // material between SSD and SDD, SDD and SPD
823 if (ilayer==3 || ilayer==1) {
824 Double_t rshield,dshield,x0shield;
825 if (ilayer==3) { // SDDouter
826 rshield=0.5*(fgLayers[ilayer+1].GetR() + r);
828 x0shield=kX0shieldSDD;
832 x0shield=kX0shieldSPD;
835 if (!currenttrack1.PropagateToTGeo(rshield,1)) continue;
837 if (!currenttrack1.PropagateTo(rshield,dshield,x0shield)) continue;
842 if (!currenttrack1.GetPhiZat(r,phi,z)) continue;
844 Int_t idet=layer.FindDetectorIndex(phi,z);
845 if (idet<0) continue;
847 Double_t trackGlobXYZ1[3],trackGlobXYZ2[3];
848 currenttrack1.GetXYZ(trackGlobXYZ1);
850 //propagate to the intersection
851 const AliITSdetector &det=layer.GetDetector(idet);
852 new(¤ttrack2) AliITStrackMI(currenttrack1);
853 if (!currenttrack1.Propagate(det.GetPhi(),det.GetR())) continue;
854 currenttrack2.Propagate(det.GetPhi(),det.GetR());
855 currenttrack1.SetDetectorIndex(idet);
856 currenttrack2.SetDetectorIndex(idet);
858 // Get the budget to the primary vertex and between the two layers
859 // for the current track being prolonged (before searching for clusters
862 Double_t budgetToPrimVertex = 0.;
864 if (!currenttrack2.MeanBudgetToPrimVertex(xyzVtx,2,budgetToPrimVertex))
865 budgetToPrimVertex = GetEffectiveThickness(0,0);
867 budgetToPrimVertex = GetEffectiveThickness(0,0);
870 currenttrack2.GetXYZ(trackGlobXYZ2);
872 AliTracker::MeanMaterialBudget(trackGlobXYZ1,trackGlobXYZ2,mparam);
877 // DEFINITION OF SEARCH ROAD FOR CLUSTERS SELECTION
879 Double_t dz=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadZ()*
880 TMath::Sqrt(currenttrack1.GetSigmaZ2() +
881 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
882 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
883 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer));
884 Double_t dy=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadY()*
885 TMath::Sqrt(currenttrack1.GetSigmaY2() +
886 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
887 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
888 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer));
890 // track at boundary between detectors, enlarge road
891 if ( (currenttrack1.GetY()-dy < det.GetYmin()+kBoundaryWidth) ||
892 (currenttrack1.GetY()+dy > det.GetYmax()-kBoundaryWidth) ||
893 (currenttrack1.GetZ()-dz < det.GetZmin()+kBoundaryWidth) ||
894 (currenttrack1.GetZ()+dz > det.GetZmax()-kBoundaryWidth) ) {
895 Float_t tgl = TMath::Abs(currenttrack1.GetTgl());
896 if (tgl > 1.) tgl=1.;
897 dz = TMath::Sqrt(dz*dz+kDeltaXNeighbDets*kDeltaXNeighbDets*tgl*tgl);
898 Float_t snp = TMath::Abs(currenttrack1.GetSnp());
899 if (snp > AliITSReconstructor::GetRecoParam()->GetMaxSnp()) continue;
900 dy = TMath::Sqrt(dy*dy+kDeltaXNeighbDets*kDeltaXNeighbDets*snp*snp);
903 // road in global (rphi,z)
904 Double_t zmin = currenttrack1.GetZ() - dz;
905 Double_t zmax = currenttrack1.GetZ() + dz;
906 Double_t ymin = currenttrack1.GetY() + r*det.GetPhi() - dy;
907 Double_t ymax = currenttrack1.GetY() + r*det.GetPhi() + dy;
908 // select clusters in road
909 layer.SelectClusters(zmin,zmax,ymin,ymax);
910 //********************
912 // Define criteria for track-cluster association
913 Double_t msz = currenttrack1.GetSigmaZ2() +
914 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
915 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
916 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer);
917 Double_t msy = currenttrack1.GetSigmaY2() +
918 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
919 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
920 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer);
922 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZC();
923 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYC();
925 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZNonC();
926 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYNonC();
928 msz = 1./msz; // 1/RoadZ^2
929 msy = 1./msy; // 1/RoadY^2
932 // LOOP OVER ALL POSSIBLE TRACK PROLONGATIONS ON THIS LAYER
934 const AliITSRecPoint *cl=0;
936 Double_t chi2trkcl=AliITSReconstructor::GetRecoParam()->GetMaxChi2(); // init with big value
938 currenttrack = ¤ttrack1;
939 // loop over selected clusters
940 while ((cl=layer.GetNextCluster(clidx))!=0) {
941 if (ntracks[ilayer]>95) break; //space for skipped clusters
942 Bool_t changedet =kFALSE;
943 if (cl->GetQ()==0 && (deadzone==1)) continue;
944 Int_t idet=cl->GetDetectorIndex();
946 if (currenttrack->GetDetectorIndex()==idet) { // track already on the cluster's detector
947 // a first cut on track-cluster distance
948 if ( (currenttrack->GetZ()-cl->GetZ())*(currenttrack->GetZ()-cl->GetZ())*msz +
949 (currenttrack->GetY()-cl->GetY())*(currenttrack->GetY()-cl->GetY())*msy > 1. )
950 continue; // cluster not associated to track
951 } else { // have to move track to cluster's detector
952 const AliITSdetector &det=layer.GetDetector(idet);
953 // a first cut on track-cluster distance
955 if (!currenttrack2.GetProlongationFast(det.GetPhi(),det.GetR(),y,z)) continue;
956 if ( (z-cl->GetZ())*(z-cl->GetZ())*msz +
957 (y-cl->GetY())*(y-cl->GetY())*msy > 1. )
958 continue; // cluster not associated to track
960 new (&backuptrack) AliITStrackMI(currenttrack2);
962 currenttrack =¤ttrack2;
963 if (!currenttrack->Propagate(det.GetPhi(),det.GetR())) {
964 new (currenttrack) AliITStrackMI(backuptrack);
968 currenttrack->SetDetectorIndex(idet);
969 // Get again the budget to the primary vertex and between the two
970 // layers for the current track being prolonged, if had to change detector
972 if (!currenttrack->MeanBudgetToPrimVertex(xyzVtx,2,budgetToPrimVertex))
973 budgetToPrimVertex = GetEffectiveThickness(0,0);
974 currenttrack->GetXYZ(trackGlobXYZ2);
975 AliTracker::MeanMaterialBudget(trackGlobXYZ1,trackGlobXYZ2,mparam);
977 budgetToPrimVertex = GetEffectiveThickness(0,0);
981 // calculate track-clusters chi2
982 chi2trkcl = GetPredictedChi2MI(currenttrack,cl,ilayer);
984 if (chi2trkcl < AliITSReconstructor::GetRecoParam()->GetMaxChi2s(ilayer)) {
985 if (cl->GetQ()==0) deadzone=1; // take dead zone only once
986 if (ntracks[ilayer]>=100) continue;
987 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
988 updatetrack->SetClIndex(ilayer,0);
989 if (changedet) new (¤ttrack2) AliITStrackMI(backuptrack);
992 if (!UpdateMI(updatetrack,cl,chi2trkcl,(ilayer<<28)+clidx)) continue;
993 updatetrack->SetSampledEdx(cl->GetQ(),updatetrack->GetNumberOfClusters()-1); //b.b.
994 } else { // cluster in dead zone
995 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
996 updatetrack->SetDeadZoneProbability(GetDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
998 if (cl->IsUsed()) updatetrack->IncrementNUsed();
1000 // apply correction for material of the current layer
1002 Double_t d,lengthTimesMeanDensity;
1004 lengthTimesMeanDensity=mparam[0]*mparam[4];
1005 updatetrack->CorrectForMeanMaterial(d,lengthTimesMeanDensity);
1008 d=layer.GetThickness(updatetrack->GetY(),updatetrack->GetZ(),x0);
1009 updatetrack->CorrectForMaterial(d,x0);
1011 if (constrain) { // apply vertex constrain
1012 updatetrack->SetConstrain(constrain);
1013 Bool_t isPrim = kTRUE;
1014 if (ilayer<4) { // check that it's close to the vertex
1015 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
1016 if (TMath::Abs(updatetrack->GetD(0)/(1.+ilayer)) > // y
1017 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk() ||
1018 TMath::Abs(updatetrack->GetD(1)/(1.+ilayer)) > // z
1019 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk()) isPrim=kFALSE;
1021 if (isPrim) updatetrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1022 } //apply vertex constrain
1024 } // create new hypothesis
1025 } // loop over possible cluster prolongation
1026 if (constrain&&itrack<2&¤ttrack1.GetNSkipped()==0 && deadzone==0&&ntracks[ilayer]<100) {
1027 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
1028 vtrack->SetClIndex(ilayer,0);
1029 vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1030 vtrack->IncrementNSkipped();
1034 if (constrain&&itrack<1&&TMath::Abs(currenttrack1.GetTgl())>1.1) { //big theta - for low flux
1035 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
1036 vtrack->SetClIndex(ilayer,0);
1037 vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1038 vtrack->SetNDeadZone(vtrack->GetNDeadZone()+1);
1045 //loop over track candidates for the current layer
1051 for (Int_t itrack=0;itrack<ntracks[ilayer];itrack++){
1052 normalizedchi2[itrack] = NormalizedChi2(&tracks[ilayer][itrack],ilayer);
1053 if (normalizedchi2[itrack] <
1054 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2ForGolden(ilayer)) golden++;
1058 if (constrain) { // constrain
1059 if (normalizedchi2[itrack]<AliITSReconstructor::GetRecoParam()->GetMaxNormChi2C(ilayer)+1)
1061 } else { // !constrain
1062 if (normalizedchi2[itrack]<AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonC(ilayer)+1)
1067 // sort tracks by increasing normalized chi2
1068 TMath::Sort(ntracks[ilayer],normalizedchi2,nindexes[ilayer],kFALSE);
1069 ntracks[ilayer] = TMath::Min(accepted,7+2*ilayer);
1070 if (ntracks[ilayer]<golden+2+ilayer) ntracks[ilayer]=TMath::Min(golden+2+ilayer,accepted);
1071 if (ntracks[ilayer]>90) ntracks[ilayer]=90;
1072 } // end loop over layers
1074 //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]);
1077 // Now select tracks to be kept
1079 Int_t max = constrain ? 20 : 5;
1081 // tracks that reach layer 0 (SPD inner)
1082 for (Int_t i=0; i<TMath::Min(max,ntracks[0]); i++) {
1083 AliITStrackMI & track= tracks[0][nindexes[0][i]];
1084 if (track.GetNumberOfClusters()<2) continue;
1085 if (!constrain && track.GetNormChi2(0) >
1086 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) continue;
1087 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1090 // tracks that reach layer 1 (SPD outer)
1091 for (Int_t i=0;i<TMath::Min(2,ntracks[1]);i++) {
1092 AliITStrackMI & track= tracks[1][nindexes[1][i]];
1093 if (track.GetNumberOfClusters()<4) continue;
1094 if (!constrain && track.GetNormChi2(1) >
1095 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) continue;
1096 if (constrain) track.IncrementNSkipped();
1098 track.SetD(0,track.GetD(GetX(),GetY()));
1099 track.SetNSkipped(track.GetNSkipped()+4./(4.+8.*TMath::Abs(track.GetD(0))));
1100 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
1101 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
1104 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1107 // tracks that reack layer 2 (SDD inner), only during non-constrained pass
1109 for (Int_t i=0;i<TMath::Min(2,ntracks[2]);i++) {
1110 AliITStrackMI & track= tracks[2][nindexes[2][i]];
1111 if (track.GetNumberOfClusters()<3) continue;
1112 if (!constrain && track.GetNormChi2(2) >
1113 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) continue;
1114 if (constrain) track.SetNSkipped(track.GetNSkipped()+2);
1116 track.SetD(0,track.GetD(GetX(),GetY()));
1117 track.SetNSkipped(track.GetNSkipped()+7./(7.+8.*TMath::Abs(track.GetD(0))));
1118 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
1119 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
1122 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1128 // register best track of each layer - important for V0 finder
1130 for (Int_t ilayer=0;ilayer<5;ilayer++){
1131 if (ntracks[ilayer]==0) continue;
1132 AliITStrackMI & track= tracks[ilayer][nindexes[ilayer][0]];
1133 if (track.GetNumberOfClusters()<1) continue;
1134 CookLabel(&track,0);
1135 bestarray->AddAt(new AliITStrackMI(track),ilayer);
1139 // update TPC V0 information
1141 if (otrack->GetESDtrack()->GetV0Index(0)>0){
1142 Float_t fprimvertex[3]={GetX(),GetY(),GetZ()};
1143 for (Int_t i=0;i<3;i++){
1144 Int_t index = otrack->GetESDtrack()->GetV0Index(i);
1145 if (index==0) break;
1146 AliV0 *vertex = (AliV0*)fEsd->GetV0(index);
1147 if (vertex->GetStatus()<0) continue; // rejected V0
1149 if (otrack->GetSign()>0) {
1150 vertex->SetIndex(0,esdindex);
1153 vertex->SetIndex(1,esdindex);
1155 //find nearest layer with track info
1156 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
1157 Int_t nearestold = GetNearestLayer(xrp); //I.B.
1158 Int_t nearest = nearestold;
1159 for (Int_t ilayer =nearest;ilayer<8;ilayer++){
1160 if (ntracks[nearest]==0){
1165 AliITStrackMI & track= tracks[nearest][nindexes[nearest][0]];
1166 if (nearestold<5&&nearest<5){
1167 Bool_t accept = track.GetNormChi2(nearest)<10;
1169 if (track.GetSign()>0) {
1170 vertex->SetParamP(track);
1171 vertex->Update(fprimvertex);
1172 //vertex->SetIndex(0,track.fESDtrack->GetID());
1173 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1175 vertex->SetParamN(track);
1176 vertex->Update(fprimvertex);
1177 //vertex->SetIndex(1,track.fESDtrack->GetID());
1178 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1180 vertex->SetStatus(vertex->GetStatus()+1);
1182 //vertex->SetStatus(-2); // reject V0 - not enough clusters
1189 //------------------------------------------------------------------------
1190 AliITStrackerMI::AliITSlayer & AliITStrackerMI::GetLayer(Int_t layer) const
1192 //--------------------------------------------------------------------
1195 return fgLayers[layer];
1197 //------------------------------------------------------------------------
1198 AliITStrackerMI::AliITSlayer::AliITSlayer():
1223 //--------------------------------------------------------------------
1224 //default AliITSlayer constructor
1225 //--------------------------------------------------------------------
1226 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
1227 fClusterWeight[i]=0;
1228 fClusterTracks[0][i]=-1;
1229 fClusterTracks[1][i]=-1;
1230 fClusterTracks[2][i]=-1;
1231 fClusterTracks[3][i]=-1;
1234 //------------------------------------------------------------------------
1235 AliITStrackerMI::AliITSlayer::
1236 AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd):
1261 //--------------------------------------------------------------------
1262 //main AliITSlayer constructor
1263 //--------------------------------------------------------------------
1264 fDetectors=new AliITSdetector[fNladders*fNdetectors];
1265 fRoad=2*fR*TMath::Sqrt(TMath::Pi()/1.);//assuming that there's only one cluster
1267 //------------------------------------------------------------------------
1268 AliITStrackerMI::AliITSlayer::AliITSlayer(const AliITSlayer& layer):
1270 fPhiOffset(layer.fPhiOffset),
1271 fNladders(layer.fNladders),
1272 fZOffset(layer.fZOffset),
1273 fNdetectors(layer.fNdetectors),
1274 fDetectors(layer.fDetectors),
1279 fClustersCs(layer.fClustersCs),
1280 fClusterIndexCs(layer.fClusterIndexCs),
1284 fCurrentSlice(layer.fCurrentSlice),
1291 fAccepted(layer.fAccepted),
1295 //------------------------------------------------------------------------
1296 AliITStrackerMI::AliITSlayer::~AliITSlayer() {
1297 //--------------------------------------------------------------------
1298 // AliITSlayer destructor
1299 //--------------------------------------------------------------------
1300 delete[] fDetectors;
1301 for (Int_t i=0; i<fN; i++) delete fClusters[i];
1302 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
1303 fClusterWeight[i]=0;
1304 fClusterTracks[0][i]=-1;
1305 fClusterTracks[1][i]=-1;
1306 fClusterTracks[2][i]=-1;
1307 fClusterTracks[3][i]=-1;
1310 //------------------------------------------------------------------------
1311 void AliITStrackerMI::AliITSlayer::ResetClusters() {
1312 //--------------------------------------------------------------------
1313 // This function removes loaded clusters
1314 //--------------------------------------------------------------------
1315 for (Int_t i=0; i<fN; i++) delete fClusters[i];
1316 for (Int_t i=0; i<kMaxClusterPerLayer;i++){
1317 fClusterWeight[i]=0;
1318 fClusterTracks[0][i]=-1;
1319 fClusterTracks[1][i]=-1;
1320 fClusterTracks[2][i]=-1;
1321 fClusterTracks[3][i]=-1;
1327 //------------------------------------------------------------------------
1328 void AliITStrackerMI::AliITSlayer::ResetWeights() {
1329 //--------------------------------------------------------------------
1330 // This function reset weights of the clusters
1331 //--------------------------------------------------------------------
1332 for (Int_t i=0; i<kMaxClusterPerLayer;i++) {
1333 fClusterWeight[i]=0;
1334 fClusterTracks[0][i]=-1;
1335 fClusterTracks[1][i]=-1;
1336 fClusterTracks[2][i]=-1;
1337 fClusterTracks[3][i]=-1;
1339 for (Int_t i=0; i<fN;i++) {
1340 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster(i);
1341 if (cl&&cl->IsUsed()) cl->Use();
1345 //------------------------------------------------------------------------
1346 void AliITStrackerMI::AliITSlayer::ResetRoad() {
1347 //--------------------------------------------------------------------
1348 // This function calculates the road defined by the cluster density
1349 //--------------------------------------------------------------------
1351 for (Int_t i=0; i<fN; i++) {
1352 if (TMath::Abs(fClusters[i]->GetZ())<fR) n++;
1354 if (n>1) fRoad=2*fR*TMath::Sqrt(TMath::Pi()/n);
1356 //------------------------------------------------------------------------
1357 Int_t AliITStrackerMI::AliITSlayer::InsertCluster(AliITSRecPoint *cl) {
1358 //--------------------------------------------------------------------
1359 //This function adds a cluster to this layer
1360 //--------------------------------------------------------------------
1361 if (fN==kMaxClusterPerLayer) {
1362 ::Error("InsertCluster","Too many clusters !\n");
1368 AliITSdetector &det=GetDetector(cl->GetDetectorIndex());
1369 if (cl->GetY()<det.GetYmin()) det.SetYmin(cl->GetY());
1370 if (cl->GetY()>det.GetYmax()) det.SetYmax(cl->GetY());
1371 if (cl->GetZ()<det.GetZmin()) det.SetZmin(cl->GetZ());
1372 if (cl->GetZ()>det.GetZmax()) det.SetZmax(cl->GetZ());
1376 //------------------------------------------------------------------------
1377 void AliITStrackerMI::AliITSlayer::SortClusters()
1382 AliITSRecPoint **clusters = new AliITSRecPoint*[fN];
1383 Float_t *z = new Float_t[fN];
1384 Int_t * index = new Int_t[fN];
1386 for (Int_t i=0;i<fN;i++){
1387 z[i] = fClusters[i]->GetZ();
1389 TMath::Sort(fN,z,index,kFALSE);
1390 for (Int_t i=0;i<fN;i++){
1391 clusters[i] = fClusters[index[i]];
1394 for (Int_t i=0;i<fN;i++){
1395 fClusters[i] = clusters[i];
1396 fZ[i] = fClusters[i]->GetZ();
1397 AliITSdetector &det=GetDetector(fClusters[i]->GetDetectorIndex());
1398 Double_t y=fR*det.GetPhi() + fClusters[i]->GetY();
1399 if (y>2.*fR*TMath::Pi()) y -= 2.*fR*TMath::Pi();
1409 for (Int_t i=0;i<fN;i++){
1410 if (fY[i]<fYB[0]) fYB[0]=fY[i];
1411 if (fY[i]>fYB[1]) fYB[1]=fY[i];
1412 fClusterIndex[i] = i;
1416 fDy5 = (fYB[1]-fYB[0])/5.;
1417 fDy10 = (fYB[1]-fYB[0])/10.;
1418 fDy20 = (fYB[1]-fYB[0])/20.;
1419 for (Int_t i=0;i<6;i++) fN5[i] =0;
1420 for (Int_t i=0;i<11;i++) fN10[i]=0;
1421 for (Int_t i=0;i<21;i++) fN20[i]=0;
1423 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;}
1424 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;}
1425 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;}
1428 for (Int_t i=0;i<fN;i++)
1429 for (Int_t irot=-1;irot<=1;irot++){
1430 Float_t curY = fY[i]+irot*TMath::TwoPi()*fR;
1432 for (Int_t slice=0; slice<6;slice++){
1433 if (fBy5[slice][0]<curY && curY<fBy5[slice][1]&&fN5[slice]<kMaxClusterPerLayer5){
1434 fClusters5[slice][fN5[slice]] = fClusters[i];
1435 fY5[slice][fN5[slice]] = curY;
1436 fZ5[slice][fN5[slice]] = fZ[i];
1437 fClusterIndex5[slice][fN5[slice]]=i;
1442 for (Int_t slice=0; slice<11;slice++){
1443 if (fBy10[slice][0]<curY && curY<fBy10[slice][1]&&fN10[slice]<kMaxClusterPerLayer10){
1444 fClusters10[slice][fN10[slice]] = fClusters[i];
1445 fY10[slice][fN10[slice]] = curY;
1446 fZ10[slice][fN10[slice]] = fZ[i];
1447 fClusterIndex10[slice][fN10[slice]]=i;
1452 for (Int_t slice=0; slice<21;slice++){
1453 if (fBy20[slice][0]<curY && curY<fBy20[slice][1]&&fN20[slice]<kMaxClusterPerLayer20){
1454 fClusters20[slice][fN20[slice]] = fClusters[i];
1455 fY20[slice][fN20[slice]] = curY;
1456 fZ20[slice][fN20[slice]] = fZ[i];
1457 fClusterIndex20[slice][fN20[slice]]=i;
1464 // consistency check
1466 for (Int_t i=0;i<fN-1;i++){
1472 for (Int_t slice=0;slice<21;slice++)
1473 for (Int_t i=0;i<fN20[slice]-1;i++){
1474 if (fZ20[slice][i]>fZ20[slice][i+1]){
1481 //------------------------------------------------------------------------
1482 Int_t AliITStrackerMI::AliITSlayer::FindClusterIndex(Float_t z) const {
1483 //--------------------------------------------------------------------
1484 // This function returns the index of the nearest cluster
1485 //--------------------------------------------------------------------
1488 if (fCurrentSlice<0) {
1497 if (ncl==0) return 0;
1498 Int_t b=0, e=ncl-1, m=(b+e)/2;
1499 for (; b<e; m=(b+e)/2) {
1500 // if (z > fClusters[m]->GetZ()) b=m+1;
1501 if (z > zcl[m]) b=m+1;
1506 //------------------------------------------------------------------------
1507 void AliITStrackerMI::AliITSlayer::
1508 SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1509 //--------------------------------------------------------------------
1510 // This function sets the "window"
1511 //--------------------------------------------------------------------
1513 Double_t circle=2*TMath::Pi()*fR;
1514 fYmin = ymin; fYmax =ymax;
1515 Float_t ymiddle = (fYmin+fYmax)*0.5;
1516 if (ymiddle<fYB[0]) {fYmin+=circle; fYmax+=circle;ymiddle+=circle;}
1518 if (ymiddle>fYB[1]) {fYmin-=circle; fYmax-=circle;ymiddle-=circle;}
1523 fClustersCs = fClusters;
1524 fClusterIndexCs = fClusterIndex;
1530 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy20){
1531 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy20);
1532 if (slice<0) slice=0;
1533 if (slice>20) slice=20;
1534 Bool_t isOK = (fYmin>fBy20[slice][0]&&fYmax<fBy20[slice][1]);
1536 fCurrentSlice=slice;
1537 fClustersCs = fClusters20[fCurrentSlice];
1538 fClusterIndexCs = fClusterIndex20[fCurrentSlice];
1539 fYcs = fY20[fCurrentSlice];
1540 fZcs = fZ20[fCurrentSlice];
1541 fNcs = fN20[fCurrentSlice];
1546 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy10){
1547 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy10);
1548 if (slice<0) slice=0;
1549 if (slice>10) slice=10;
1550 Bool_t isOK = (fYmin>fBy10[slice][0]&&fYmax<fBy10[slice][1]);
1552 fCurrentSlice=slice;
1553 fClustersCs = fClusters10[fCurrentSlice];
1554 fClusterIndexCs = fClusterIndex10[fCurrentSlice];
1555 fYcs = fY10[fCurrentSlice];
1556 fZcs = fZ10[fCurrentSlice];
1557 fNcs = fN10[fCurrentSlice];
1562 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy5){
1563 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy5);
1564 if (slice<0) slice=0;
1565 if (slice>5) slice=5;
1566 Bool_t isOK = (fYmin>fBy5[slice][0]&&fYmax<fBy5[slice][1]);
1568 fCurrentSlice=slice;
1569 fClustersCs = fClusters5[fCurrentSlice];
1570 fClusterIndexCs = fClusterIndex5[fCurrentSlice];
1571 fYcs = fY5[fCurrentSlice];
1572 fZcs = fZ5[fCurrentSlice];
1573 fNcs = fN5[fCurrentSlice];
1577 fI=FindClusterIndex(zmin); fZmax=zmax;
1578 fImax = TMath::Min(FindClusterIndex(zmax)+1,fNcs);
1582 //------------------------------------------------------------------------
1583 Int_t AliITStrackerMI::AliITSlayer::
1584 FindDetectorIndex(Double_t phi, Double_t z) const {
1585 //--------------------------------------------------------------------
1586 //This function finds the detector crossed by the track
1587 //--------------------------------------------------------------------
1589 if (fZOffset<0) // old geometry
1590 dphi = -(phi-fPhiOffset);
1591 else // new geometry
1592 dphi = phi-fPhiOffset;
1594 if (dphi < 0) dphi += 2*TMath::Pi();
1595 else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi();
1596 Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5);
1597 if (np>=fNladders) np-=fNladders;
1598 if (np<0) np+=fNladders;
1600 Double_t dz=fZOffset-z;
1601 Int_t nz=Int_t(dz*(fNdetectors-1)*0.5/fZOffset+0.5);
1602 if (nz>=fNdetectors) return -1;
1603 if (nz<0) return -1;
1605 return np*fNdetectors + nz;
1607 //------------------------------------------------------------------------
1608 const AliITSRecPoint *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci){
1609 //--------------------------------------------------------------------
1610 // This function returns clusters within the "window"
1611 //--------------------------------------------------------------------
1613 if (fCurrentSlice<0){
1614 Double_t rpi2 = 2.*fR*TMath::Pi();
1615 for (Int_t i=fI; i<fImax; i++) {
1617 if (fYmax<y) y -= rpi2;
1618 if (fYmin>y) y += rpi2;
1619 if (y<fYmin) continue;
1620 if (y>fYmax) continue;
1621 if (fClusters[i]->GetQ()==0&&fSkip==2) continue;
1624 return fClusters[i];
1628 for (Int_t i=fI; i<fImax; i++) {
1629 if (fYcs[i]<fYmin) continue;
1630 if (fYcs[i]>fYmax) continue;
1631 if (fClustersCs[i]->GetQ()==0&&fSkip==2) continue;
1632 ci=fClusterIndexCs[i];
1634 return fClustersCs[i];
1639 //------------------------------------------------------------------------
1640 Double_t AliITStrackerMI::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0)
1642 //--------------------------------------------------------------------
1643 // This function returns the layer thickness at this point (units X0)
1644 //--------------------------------------------------------------------
1647 if (43<fR&&fR<45) { //SSD2
1650 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1651 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1652 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1653 for (Int_t i=0; i<12; i++) {
1654 if (TMath::Abs(z-3.9*(i+0.5))<0.15) {
1655 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1659 if (TMath::Abs(z+3.9*(i+0.5))<0.15) {
1660 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1664 if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1665 if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1668 if (37<fR&&fR<41) { //SSD1
1671 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1672 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1673 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1674 for (Int_t i=0; i<11; i++) {
1675 if (TMath::Abs(z-3.9*i)<0.15) {
1676 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1680 if (TMath::Abs(z+3.9*i)<0.15) {
1681 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1685 if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1686 if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1689 if (13<fR&&fR<26) { //SDD
1692 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1694 if (TMath::Abs(y-1.80)<0.55) {
1696 for (Int_t j=0; j<20; j++) {
1697 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1698 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1701 if (TMath::Abs(y+1.80)<0.55) {
1703 for (Int_t j=0; j<20; j++) {
1704 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1705 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1709 for (Int_t i=0; i<4; i++) {
1710 if (TMath::Abs(z-7.3*i)<0.60) {
1712 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1715 if (TMath::Abs(z+7.3*i)<0.60) {
1717 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1722 if (6<fR&&fR<8) { //SPD2
1723 Double_t dd=0.0063; x0=21.5;
1725 if (TMath::Abs(y-3.08)>0.5) d+=dd;
1726 if (TMath::Abs(y-3.03)<0.10) d+=0.014;
1728 if (3<fR&&fR<5) { //SPD1
1729 Double_t dd=0.0063; x0=21.5;
1731 if (TMath::Abs(y+0.21)>0.6) d+=dd;
1732 if (TMath::Abs(y+0.10)<0.10) d+=0.014;
1737 //------------------------------------------------------------------------
1738 Double_t AliITStrackerMI::GetEffectiveThickness(Double_t y,Double_t z) const
1740 //--------------------------------------------------------------------
1741 // Returns the thickness between the current layer and the vertex (units X0)
1742 //--------------------------------------------------------------------
1745 Double_t d=kdPipe*krPipe*krPipe;
1749 Double_t xn=fgLayers[fI].GetR();
1750 for (Int_t i=0; i<fI; i++) {
1751 Double_t xi=fgLayers[i].GetR();
1752 d+=fgLayers[i].GetThickness(y,z,x0)*xi*xi;
1757 d+=kdshieldSPD*krshieldSPD*krshieldSPD;
1760 Double_t xi=0.5*(fgLayers[3].GetR()+fgLayers[4].GetR());
1761 d+=kdshieldSDD*xi*xi;
1766 //------------------------------------------------------------------------
1767 Int_t AliITStrackerMI::AliITSlayer::InRoad() const {
1768 //--------------------------------------------------------------------
1769 // This function returns number of clusters within the "window"
1770 //--------------------------------------------------------------------
1772 for (Int_t i=fI; i<fN; i++) {
1773 const AliITSRecPoint *c=fClusters[i];
1774 if (c->GetZ() > fZmax) break;
1775 if (c->IsUsed()) continue;
1776 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
1777 Double_t y=fR*det.GetPhi() + c->GetY();
1779 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
1780 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
1782 if (y<fYmin) continue;
1783 if (y>fYmax) continue;
1788 //------------------------------------------------------------------------
1789 Bool_t AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *t,
1790 const AliITStrackMI *c, Bool_t extra) {
1791 //--------------------------------------------------------------------
1792 // This function refits the track "t" at the position "x" using
1793 // the clusters from "c"
1794 // If "extra"==kTRUE,
1795 // the clusters from overlapped modules get attached to "t"
1796 //--------------------------------------------------------------------
1797 Int_t index[kMaxLayer];
1799 for (k=0; k<kMaxLayer; k++) index[k]=-1;
1800 Int_t nc=c->GetNumberOfClusters();
1801 for (k=0; k<nc; k++) {
1802 Int_t idx=c->GetClusterIndex(k),nl=(idx&0xf0000000)>>28;
1806 // special for cosmics: check which the innermost layer crossed
1808 Int_t innermostlayer=5;
1809 Double_t d = TMath::Abs(t->GetD(0.,0.));
1810 for(innermostlayer=0; innermostlayer<kMaxLayer; innermostlayer++)
1811 if(d<fgLayers[innermostlayer].GetR()) break;
1812 //printf(" d %f innermost %d\n",d,innermostlayer);
1814 Int_t from, to, step;
1815 if (xx > t->GetX()) {
1816 from=innermostlayer; to=kMaxLayer;
1819 from=kMaxLayer-1; to=innermostlayer-1;
1823 // loop on the layers
1824 for (Int_t i=from; i != to; i += step) {
1825 AliITSlayer &layer=fgLayers[i];
1826 Double_t r=layer.GetR();
1828 // material between SSD and SDD, SDD and SPD
1829 Double_t hI=i-0.5*step;
1830 if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) {
1831 Double_t rshield,dshield,x0shield;
1832 if (TMath::Abs(hI-3.5)<0.01) { // SDDouter
1833 rshield=0.5*(fgLayers[i-step].GetR() + r);
1834 dshield=kdshieldSDD;
1835 x0shield=kX0shieldSDD;
1836 } else { // SPDouter
1837 rshield=krshieldSPD;
1838 dshield=kdshieldSPD;
1839 x0shield=kX0shieldSPD;
1842 if (!t->PropagateToTGeo(rshield,1)) return kFALSE;
1844 if (!t->PropagateTo(rshield,-step*dshield,x0shield)) return kFALSE;
1848 // remember old position [SR, GSI 18.02.2003]
1849 Double_t oldX=0., oldY=0., oldZ=0.;
1850 if (t->IsStartedTimeIntegral() && step==1) {
1851 t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ);
1855 Double_t oldGlobXYZ[3];
1856 t->GetXYZ(oldGlobXYZ);
1859 if (!t->GetPhiZat(r,phi,z)) return kFALSE;
1861 Int_t idet=layer.FindDetectorIndex(phi,z);
1866 const AliITSdetector &det=layer.GetDetector(idet);
1868 if (!t->Propagate(phi,det.GetR())) {
1871 t->SetDetectorIndex(idet);
1873 const AliITSRecPoint *cl=0;
1874 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
1878 const AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(idx);
1880 if (idet != c->GetDetectorIndex()) {
1881 idet=c->GetDetectorIndex();
1882 const AliITSdetector &det=layer.GetDetector(idet);
1883 if (!t->Propagate(det.GetPhi(),det.GetR())) {
1886 t->SetDetectorIndex(idet);
1888 //Double_t chi2=t->GetPredictedChi2(c);
1889 Int_t layer = (idx & 0xf0000000) >> 28;;
1890 Double_t chi2=GetPredictedChi2MI(t,c,layer);
1901 if (!UpdateMI(t,cl,maxchi2,idx)) return kFALSE;
1902 t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
1905 // Correct for material of the current layer
1908 Double_t globXYZ[3];
1911 AliTracker::MeanMaterialBudget(oldGlobXYZ,globXYZ,mparam);
1912 if (mparam[1]<900000) {
1914 Double_t lengthTimesMeanDensity=mparam[0]*mparam[4];
1915 t->CorrectForMeanMaterial(d,lengthTimesMeanDensity);
1917 d=layer.GetThickness(t->GetY(),t->GetZ(),x0);
1918 t->CorrectForMaterial(-step*d,x0);
1921 d=layer.GetThickness(t->GetY(),t->GetZ(),x0);
1922 t->CorrectForMaterial(-step*d,x0);
1926 if (extra) { //search for extra clusters
1927 AliITStrackV2 tmp(*t);
1928 Double_t dz=4*TMath::Sqrt(tmp.GetSigmaZ2()+AliITSReconstructor::GetRecoParam()->GetSigmaZ2(i));
1929 if (dz < 0.5*TMath::Abs(tmp.GetTgl())) dz=0.5*TMath::Abs(tmp.GetTgl());
1930 Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+AliITSReconstructor::GetRecoParam()->GetSigmaY2(i));
1931 if (dy < 0.5*TMath::Abs(tmp.GetSnp())) dy=0.5*TMath::Abs(tmp.GetSnp());
1932 Double_t zmin=t->GetZ() - dz;
1933 Double_t zmax=t->GetZ() + dz;
1934 Double_t ymin=t->GetY() + phi*r - dy;
1935 Double_t ymax=t->GetY() + phi*r + dy;
1936 layer.SelectClusters(zmin,zmax,ymin,ymax);
1938 const AliITSRecPoint *c=0; Int_t ci=-1,cci=-1;
1939 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2(), tolerance=0.1;
1940 while ((c=layer.GetNextCluster(ci))!=0) {
1941 if (idet == c->GetDetectorIndex()) continue;
1943 const AliITSdetector &det=layer.GetDetector(c->GetDetectorIndex());
1945 if (!tmp.Propagate(det.GetPhi(),det.GetR())) continue;
1947 if (TMath::Abs(tmp.GetZ() - c->GetZ()) > tolerance) continue;
1948 if (TMath::Abs(tmp.GetY() - c->GetY()) > tolerance) continue;
1950 Double_t chi2=tmp.GetPredictedChi2(c);
1951 if (chi2<maxchi2) { maxchi2=chi2; cci=ci; }
1953 if (cci>=0) t->SetExtraCluster(i,(i<<28)+cci);
1956 // track time update [SR, GSI 17.02.2003]
1957 if (t->IsStartedTimeIntegral() && step==1) {
1958 Double_t newX, newY, newZ;
1959 t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
1960 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
1961 (oldZ-newZ)*(oldZ-newZ);
1962 t->AddTimeStep(TMath::Sqrt(dL2));
1966 } // end loop on the layers
1968 if (!t->PropagateTo(xx,0.,0.)) return kFALSE;
1971 //------------------------------------------------------------------------
1973 AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *t,const Int_t *clindex) {
1974 //--------------------------------------------------------------------
1975 // This function refits the track "t" at the position "x" using
1976 // the clusters from array
1977 //--------------------------------------------------------------------
1978 Int_t index[kMaxLayer];
1980 for (k=0; k<kMaxLayer; k++) index[k]=-1;
1982 for (k=0; k<kMaxLayer; k++) {
1983 index[k]=clindex[k];
1986 // special for cosmics: check which the innermost layer crossed
1988 Int_t innermostlayer=5;
1989 Double_t d = TMath::Abs(t->GetD(0.,0.));
1990 for(innermostlayer=0; innermostlayer<kMaxLayer; innermostlayer++)
1991 if(d<fgLayers[innermostlayer].GetR()) break;
1992 //printf(" d %f innermost %d\n",d,innermostlayer);
1994 Int_t from, to, step;
1995 if (xx > t->GetX()) {
1996 from=innermostlayer; to=kMaxLayer;
1999 from=kMaxLayer-1; to=innermostlayer-1;
2003 for (Int_t i=from; i != to; i += step) {
2004 AliITSlayer &layer=fgLayers[i];
2005 Double_t r=layer.GetR();
2006 if (step<0 && xx>r) break;
2008 // material between SSD and SDD, SDD and SPD
2009 Double_t hI=i-0.5*step;
2010 if (TMath::Abs(hI-1.5)<0.01 || TMath::Abs(hI-3.5)<0.01) {
2011 Double_t rshield,dshield,x0shield;
2012 if (TMath::Abs(hI-3.5)<0.01) { // SDDouter
2013 rshield=0.5*(fgLayers[i-step].GetR() + r);
2014 dshield=kdshieldSDD;
2015 x0shield=kX0shieldSDD;
2016 } else { // SPDouter
2017 rshield=krshieldSPD;
2018 dshield=kdshieldSPD;
2019 x0shield=kX0shieldSPD;
2022 if (!t->PropagateToTGeo(rshield,1)) return kFALSE;
2024 if (!t->PropagateTo(rshield,-step*dshield,x0shield)) return kFALSE;
2028 // remember old position [SR, GSI 18.02.2003]
2029 Double_t oldX=0., oldY=0., oldZ=0.;
2030 if (t->IsStartedTimeIntegral() && step==1) {
2031 t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ);
2034 Double_t oldGlobXYZ[3];
2035 t->GetXYZ(oldGlobXYZ);
2038 if (!t->GetPhiZat(r,phi,z)) return kFALSE;
2040 Int_t idet=layer.FindDetectorIndex(phi,z);
2044 const AliITSdetector &det=layer.GetDetector(idet);
2046 if (!t->Propagate(phi,det.GetR())) {
2049 t->SetDetectorIndex(idet);
2051 const AliITSRecPoint *cl=0;
2052 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
2056 const AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(idx);
2058 if (idet != c->GetDetectorIndex()) {
2059 idet=c->GetDetectorIndex();
2060 const AliITSdetector &det=layer.GetDetector(idet);
2061 if (!t->Propagate(det.GetPhi(),det.GetR())) {
2064 t->SetDetectorIndex(idet);
2066 //Double_t chi2=t->GetPredictedChi2(c);
2067 Int_t layer = (idx & 0xf0000000) >> 28;;
2068 Double_t chi2=GetPredictedChi2MI(t,c,layer);
2079 if (!UpdateMI(t,cl,maxchi2,idx)) return kFALSE;
2080 t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
2083 // Correct for material of the current layer
2086 Double_t globXYZ[3];
2089 AliTracker::MeanMaterialBudget(oldGlobXYZ,globXYZ,mparam);
2090 if (mparam[1]<900000) {
2092 Double_t lengthTimesMeanDensity=mparam[0]*mparam[4];
2093 t->CorrectForMeanMaterial(d,lengthTimesMeanDensity);
2095 d=layer.GetThickness(t->GetY(),t->GetZ(),x0);
2096 t->CorrectForMaterial(-step*d,x0);
2099 d=layer.GetThickness(t->GetY(),t->GetZ(),x0);
2100 t->CorrectForMaterial(-step*d,x0);
2103 // track time update [SR, GSI 17.02.2003]
2104 if (t->IsStartedTimeIntegral() && step==1) {
2105 Double_t newX, newY, newZ;
2106 t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
2107 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
2108 (oldZ-newZ)*(oldZ-newZ);
2109 t->AddTimeStep(TMath::Sqrt(dL2));
2115 if (!t->PropagateTo(xx,0.,0.)) return kFALSE;
2118 //------------------------------------------------------------------------
2119 Double_t AliITStrackerMI::GetNormalizedChi2(AliITStrackMI * track, Int_t mode)
2122 // calculate normalized chi2
2123 // return NormalizedChi2(track,0);
2126 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2127 // track->fdEdxMismatch=0;
2128 Float_t dedxmismatch =0;
2129 Float_t *ny = GetNy(fCurrentEsdTrack), *nz = GetNz(fCurrentEsdTrack);
2131 for (Int_t i = 0;i<6;i++){
2132 if (track->GetClIndex(i)>0){
2133 Float_t cerry, cerrz;
2134 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2136 { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
2139 Float_t cchi2 = (track->GetDy(i)*track->GetDy(i)/cerry)+(track->GetDz(i)*track->GetDz(i)/cerrz);
2141 Float_t ratio = track->GetNormQ(i)/track->GetExpQ();
2143 cchi2+=(0.5-ratio)*10.;
2144 //track->fdEdxMismatch+=(0.5-ratio)*10.;
2145 dedxmismatch+=(0.5-ratio)*10.;
2149 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster( track->GetClIndex(i));
2150 Double_t delta = cl->GetNy()+cl->GetNz()-ny[i]-nz[i];
2151 if (delta>1) chi2 +=0.5*TMath::Min(delta/2,2.);
2152 if (i<2) chi2+=2*cl->GetDeltaProbability();
2158 if (TMath::Abs(track->GetdEdxMismatch()-dedxmismatch)>0.0001){
2159 track->SetdEdxMismatch(dedxmismatch);
2163 for (Int_t i = 0;i<4;i++){
2164 if (track->GetClIndex(i)>0){
2165 Float_t cerry, cerrz;
2166 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2167 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
2170 chi2+= (track->GetDy(i)*track->GetDy(i)/cerry);
2171 chi2+= (track->GetDz(i)*track->GetDz(i)/cerrz);
2175 for (Int_t i = 4;i<6;i++){
2176 if (track->GetClIndex(i)>0){
2177 Float_t cerry, cerrz;
2178 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2179 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
2182 Float_t cerryb, cerrzb;
2183 if (ny[i+6]>0) {cerryb = erry[i+6]; cerrzb=errz[i+6];}
2184 else { cerryb= track->GetSigmaY(i+6); cerrzb = track->GetSigmaZ(i+6);}
2187 chi2+= TMath::Min((track->GetDy(i+6)*track->GetDy(i+6)/cerryb),track->GetDy(i)*track->GetDy(i)/cerry);
2188 chi2+= TMath::Min((track->GetDz(i+6)*track->GetDz(i+6)/cerrzb),track->GetDz(i)*track->GetDz(i)/cerrz);
2193 if (track->GetESDtrack()->GetTPCsignal()>85){
2194 Float_t ratio = track->GetdEdx()/track->GetESDtrack()->GetTPCsignal();
2196 chi2+=(0.5-ratio)*5.;
2199 chi2+=(ratio-2.0)*3;
2203 Double_t match = TMath::Sqrt(track->GetChi22());
2204 if (track->GetConstrain()) match/=track->GetNumberOfClusters();
2205 if (!track->GetConstrain()) match/=track->GetNumberOfClusters()-2.;
2206 if (match<0) match=0;
2207 Float_t deadzonefactor = (track->GetNDeadZone()>0) ? 3*(1.1-track->GetDeadZoneProbability()):0.;
2208 Double_t normchi2 = 2*track->GetNSkipped()+match+deadzonefactor+(1+(2*track->GetNSkipped()+deadzonefactor)/track->GetNumberOfClusters())*
2209 (chi2)/TMath::Max(double(sum-track->GetNSkipped()),
2210 1./(1.+track->GetNSkipped()));
2214 //------------------------------------------------------------------------
2215 Double_t AliITStrackerMI::GetMatchingChi2(AliITStrackMI * track1, AliITStrackMI * track2)
2218 // return matching chi2 between two tracks
2219 AliITStrackMI track3(*track2);
2220 track3.Propagate(track1->GetAlpha(),track1->GetX());
2222 vec(0,0)=track1->GetY() - track3.GetY();
2223 vec(1,0)=track1->GetZ() - track3.GetZ();
2224 vec(2,0)=track1->GetSnp() - track3.GetSnp();
2225 vec(3,0)=track1->GetTgl() - track3.GetTgl();
2226 vec(4,0)=track1->GetSigned1Pt() - track3.GetSigned1Pt();
2229 cov(0,0) = track1->GetSigmaY2()+track3.GetSigmaY2();
2230 cov(1,1) = track1->GetSigmaZ2()+track3.GetSigmaZ2();
2231 cov(2,2) = track1->GetSigmaSnp2()+track3.GetSigmaSnp2();
2232 cov(3,3) = track1->GetSigmaTgl2()+track3.GetSigmaTgl2();
2233 cov(4,4) = track1->GetSigma1Pt2()+track3.GetSigma1Pt2();
2235 cov(0,1)=cov(1,0) = track1->GetSigmaZY()+track3.GetSigmaZY();
2236 cov(0,2)=cov(2,0) = track1->GetSigmaSnpY()+track3.GetSigmaSnpY();
2237 cov(0,3)=cov(3,0) = track1->GetSigmaTglY()+track3.GetSigmaTglY();
2238 cov(0,4)=cov(4,0) = track1->GetSigma1PtY()+track3.GetSigma1PtY();
2240 cov(1,2)=cov(2,1) = track1->GetSigmaSnpZ()+track3.GetSigmaSnpZ();
2241 cov(1,3)=cov(3,1) = track1->GetSigmaTglZ()+track3.GetSigmaTglZ();
2242 cov(1,4)=cov(4,1) = track1->GetSigma1PtZ()+track3.GetSigma1PtZ();
2244 cov(2,3)=cov(3,2) = track1->GetSigmaTglSnp()+track3.GetSigmaTglSnp();
2245 cov(2,4)=cov(4,2) = track1->GetSigma1PtSnp()+track3.GetSigma1PtSnp();
2247 cov(3,4)=cov(4,3) = track1->GetSigma1PtTgl()+track3.GetSigma1PtTgl();
2250 TMatrixD vec2(cov,TMatrixD::kMult,vec);
2251 TMatrixD chi2(vec2,TMatrixD::kTransposeMult,vec);
2254 //------------------------------------------------------------------------
2255 Double_t AliITStrackerMI::GetDeadZoneProbability(Double_t zpos, Double_t zerr)
2258 // return probability that given point (characterized by z position and error)
2259 // is in SPD dead zone
2261 Double_t probability = 0.;
2262 Double_t absz = TMath::Abs(zpos);
2263 Double_t nearestz = (absz<2.) ? 0.5*(fSPDdetzcentre[1]+fSPDdetzcentre[2]) :
2264 0.5*(fSPDdetzcentre[2]+fSPDdetzcentre[3]);
2265 if (TMath::Abs(absz-nearestz)>0.25+3.*zerr) return probability;
2266 Double_t zmin, zmax;
2267 if (zpos<-6.) { // dead zone at z = -7
2268 zmin = fSPDdetzcentre[0] + 0.5*kSPDdetzlength;
2269 zmax = fSPDdetzcentre[1] - 0.5*kSPDdetzlength;
2270 } else if (zpos>6.) { // dead zone at z = +7
2271 zmin = fSPDdetzcentre[2] + 0.5*kSPDdetzlength;
2272 zmax = fSPDdetzcentre[3] - 0.5*kSPDdetzlength;
2273 } else if (absz<2.) { // dead zone at z = 0
2274 zmin = fSPDdetzcentre[1] + 0.5*kSPDdetzlength;
2275 zmax = fSPDdetzcentre[2] - 0.5*kSPDdetzlength;
2280 // probability that the true z is in the range [zmin,zmax] (i.e. inside
2282 probability = 0.5*( TMath::Erf((zpos-zmin)/zerr/TMath::Sqrt(2.)) -
2283 TMath::Erf((zpos-zmax)/zerr/TMath::Sqrt(2.)) );
2286 //------------------------------------------------------------------------
2287 Double_t AliITStrackerMI::GetTruncatedChi2(AliITStrackMI * track, Float_t fac)
2290 // calculate normalized chi2
2292 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2294 for (Int_t i = 0;i<6;i++){
2295 if (TMath::Abs(track->GetDy(i))>0){
2296 chi2[i]= (track->GetDy(i)/erry[i])*(track->GetDy(i)/erry[i]);
2297 chi2[i]+= (track->GetDz(i)/errz[i])*(track->GetDz(i)/errz[i]);
2300 else{chi2[i]=10000;}
2303 TMath::Sort(6,chi2,index,kFALSE);
2304 Float_t max = float(ncl)*fac-1.;
2305 Float_t sumchi=0, sumweight=0;
2306 for (Int_t i=0;i<max+1;i++){
2307 Float_t weight = (i<max)?1.:(max+1.-i);
2308 sumchi+=weight*chi2[index[i]];
2311 Double_t normchi2 = sumchi/sumweight;
2314 //------------------------------------------------------------------------
2315 Double_t AliITStrackerMI::GetInterpolatedChi2(AliITStrackMI * forwardtrack, AliITStrackMI * backtrack)
2318 // calculate normalized chi2
2319 // if (forwardtrack->fNUsed>0.3*float(forwardtrack->GetNumberOfClusters())) return 10000;
2322 for (Int_t i=0;i<6;i++){
2323 if ( (backtrack->GetSigmaY(i)<0.000000001) || (forwardtrack->GetSigmaY(i)<0.000000001)) continue;
2324 Double_t sy1 = forwardtrack->GetSigmaY(i);
2325 Double_t sz1 = forwardtrack->GetSigmaZ(i);
2326 Double_t sy2 = backtrack->GetSigmaY(i);
2327 Double_t sz2 = backtrack->GetSigmaZ(i);
2328 if (i<2){ sy2=1000.;sz2=1000;}
2330 Double_t dy0 = (forwardtrack->GetDy(i)/(sy1*sy1) +backtrack->GetDy(i)/(sy2*sy2))/(1./(sy1*sy1)+1./(sy2*sy2));
2331 Double_t dz0 = (forwardtrack->GetDz(i)/(sz1*sz1) +backtrack->GetDz(i)/(sz2*sz2))/(1./(sz1*sz1)+1./(sz2*sz2));
2333 Double_t nz0 = dz0*TMath::Sqrt((1./(sz1*sz1)+1./(sz2*sz2)));
2334 Double_t ny0 = dy0*TMath::Sqrt((1./(sy1*sy1)+1./(sy2*sy2)));
2336 res+= nz0*nz0+ny0*ny0;
2339 if (npoints>1) return
2340 TMath::Max(0.3*forwardtrack->OneOverPt()-0.5,0.)+
2341 //2*forwardtrack->fNUsed+
2342 res/TMath::Max(double(npoints-forwardtrack->GetNSkipped()),
2343 1./(1.+forwardtrack->GetNSkipped()));
2346 //------------------------------------------------------------------------
2347 Float_t *AliITStrackerMI::GetWeight(Int_t index) {
2348 //--------------------------------------------------------------------
2349 // Return pointer to a given cluster
2350 //--------------------------------------------------------------------
2351 Int_t l=(index & 0xf0000000) >> 28;
2352 Int_t c=(index & 0x0fffffff) >> 00;
2353 return fgLayers[l].GetWeight(c);
2355 //------------------------------------------------------------------------
2356 void AliITStrackerMI::RegisterClusterTracks(AliITStrackMI* track,Int_t id)
2358 //---------------------------------------------
2359 // register track to the list
2361 if (track->GetESDtrack()->GetKinkIndex(0)!=0) return; //don't register kink tracks
2364 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2365 Int_t index = track->GetClusterIndex(icluster);
2366 Int_t l=(index & 0xf0000000) >> 28;
2367 Int_t c=(index & 0x0fffffff) >> 00;
2368 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2369 for (Int_t itrack=0;itrack<4;itrack++){
2370 if (fgLayers[l].GetClusterTracks(itrack,c)<0){
2371 fgLayers[l].SetClusterTracks(itrack,c,id);
2377 //------------------------------------------------------------------------
2378 void AliITStrackerMI::UnRegisterClusterTracks(AliITStrackMI* track, Int_t id)
2380 //---------------------------------------------
2381 // unregister track from the list
2382 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2383 Int_t index = track->GetClusterIndex(icluster);
2384 Int_t l=(index & 0xf0000000) >> 28;
2385 Int_t c=(index & 0x0fffffff) >> 00;
2386 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2387 for (Int_t itrack=0;itrack<4;itrack++){
2388 if (fgLayers[l].GetClusterTracks(itrack,c)==id){
2389 fgLayers[l].SetClusterTracks(itrack,c,-1);
2394 //------------------------------------------------------------------------
2395 Float_t AliITStrackerMI::GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSRecPoint *clist[6])
2397 //-------------------------------------------------------------
2398 //get number of shared clusters
2399 //-------------------------------------------------------------
2401 for (Int_t i=0;i<6;i++) { list[i]=-1, clist[i]=0;}
2402 // mean number of clusters
2403 Float_t *ny = GetNy(id), *nz = GetNz(id);
2406 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2407 Int_t index = track->GetClusterIndex(icluster);
2408 Int_t l=(index & 0xf0000000) >> 28;
2409 Int_t c=(index & 0x0fffffff) >> 00;
2410 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2412 printf("problem\n");
2414 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2418 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
2419 if (l>2&&track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
2421 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2424 deltan = (cl->GetNz()-nz[l]);
2426 if (deltan>2.0) continue; // extended - highly probable shared cluster
2427 weight = 2./TMath::Max(3.+deltan,2.);
2429 for (Int_t itrack=0;itrack<4;itrack++){
2430 if (fgLayers[l].GetClusterTracks(itrack,c)>=0 && fgLayers[l].GetClusterTracks(itrack,c)!=id){
2432 clist[l] = (AliITSRecPoint*)GetCluster(index);
2438 track->SetNUsed(shared);
2441 //------------------------------------------------------------------------
2442 Int_t AliITStrackerMI::GetOverlapTrack(AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6],Int_t overlist[6])
2445 // find first shared track
2447 // mean number of clusters
2448 Float_t *ny = GetNy(trackID), *nz = GetNz(trackID);
2450 for (Int_t i=0;i<6;i++) overlist[i]=-1;
2451 Int_t sharedtrack=100000;
2452 Int_t tracks[24],trackindex=0;
2453 for (Int_t i=0;i<24;i++) {tracks[i]=-1;}
2455 for (Int_t icluster=0;icluster<6;icluster++){
2456 if (clusterlist[icluster]<0) continue;
2457 Int_t index = clusterlist[icluster];
2458 Int_t l=(index & 0xf0000000) >> 28;
2459 Int_t c=(index & 0x0fffffff) >> 00;
2461 printf("problem\n");
2463 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2464 //if (l>3) continue;
2465 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2468 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
2469 if (l>2&&track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
2471 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2474 deltan = (cl->GetNz()-nz[l]);
2476 if (deltan>2.0) continue; // extended - highly probable shared cluster
2478 for (Int_t itrack=3;itrack>=0;itrack--){
2479 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2480 if (fgLayers[l].GetClusterTracks(itrack,c)!=trackID){
2481 tracks[trackindex] = fgLayers[l].GetClusterTracks(itrack,c);
2486 if (trackindex==0) return -1;
2488 sharedtrack = tracks[0];
2490 if (trackindex==2) sharedtrack =TMath::Min(tracks[0],tracks[1]);
2493 Int_t track[24], cluster[24];
2494 for (Int_t i=0;i<trackindex;i++){ track[i]=-1; cluster[i]=0;}
2497 for (Int_t i=0;i<trackindex;i++){
2498 if (tracks[i]<0) continue;
2499 track[index] = tracks[i];
2501 for (Int_t j=i+1;j<trackindex;j++){
2502 if (tracks[j]<0) continue;
2503 if (tracks[j]==tracks[i]){
2511 for (Int_t i=0;i<index;i++){
2512 if (cluster[index]>max) {
2513 sharedtrack=track[index];
2520 if (sharedtrack>=100000) return -1;
2522 // make list of overlaps
2524 for (Int_t icluster=0;icluster<6;icluster++){
2525 if (clusterlist[icluster]<0) continue;
2526 Int_t index = clusterlist[icluster];
2527 Int_t l=(index & 0xf0000000) >> 28;
2528 Int_t c=(index & 0x0fffffff) >> 00;
2529 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2530 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2532 if (cl->GetNy()>2) continue;
2533 if (cl->GetNz()>2) continue;
2536 if (cl->GetNy()>3) continue;
2537 if (cl->GetNz()>3) continue;
2540 for (Int_t itrack=3;itrack>=0;itrack--){
2541 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2542 if (fgLayers[l].GetClusterTracks(itrack,c)==sharedtrack){
2550 //------------------------------------------------------------------------
2551 AliITStrackMI * AliITStrackerMI::GetBest2Tracks(Int_t trackID1, Int_t trackID2, Float_t th0, Float_t th1){
2553 // try to find track hypothesys without conflicts
2554 // with minimal chi2;
2555 TClonesArray *arr1 = (TClonesArray*)fTrackHypothesys.At(trackID1);
2556 Int_t entries1 = arr1->GetEntriesFast();
2557 TClonesArray *arr2 = (TClonesArray*)fTrackHypothesys.At(trackID2);
2558 if (!arr2) return (AliITStrackMI*) arr1->UncheckedAt(0);
2559 Int_t entries2 = arr2->GetEntriesFast();
2560 if (entries2<=0) return (AliITStrackMI*) arr1->UncheckedAt(0);
2562 AliITStrackMI * track10=(AliITStrackMI*) arr1->UncheckedAt(0);
2563 AliITStrackMI * track20=(AliITStrackMI*) arr2->UncheckedAt(0);
2564 if (track10->Pt()>0.5+track20->Pt()) return track10;
2566 for (Int_t itrack=0;itrack<entries1;itrack++){
2567 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
2568 UnRegisterClusterTracks(track,trackID1);
2571 for (Int_t itrack=0;itrack<entries2;itrack++){
2572 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
2573 UnRegisterClusterTracks(track,trackID2);
2577 Float_t maxconflicts=6;
2578 Double_t maxchi2 =1000.;
2580 // get weight of hypothesys - using best hypothesy
2583 Int_t list1[6],list2[6];
2584 AliITSRecPoint *clist1[6], *clist2[6] ;
2585 RegisterClusterTracks(track10,trackID1);
2586 RegisterClusterTracks(track20,trackID2);
2587 Float_t conflict1 = GetNumberOfSharedClusters(track10,trackID1,list1,clist1);
2588 Float_t conflict2 = GetNumberOfSharedClusters(track20,trackID2,list2,clist2);
2589 UnRegisterClusterTracks(track10,trackID1);
2590 UnRegisterClusterTracks(track20,trackID2);
2593 Float_t chi21 =0,chi22=0,ncl1=0,ncl2=0;
2594 Float_t nerry[6],nerrz[6];
2595 Float_t *erry1=GetErrY(trackID1),*errz1 = GetErrZ(trackID1);
2596 Float_t *erry2=GetErrY(trackID2),*errz2 = GetErrZ(trackID2);
2597 for (Int_t i=0;i<6;i++){
2598 if ( (erry1[i]>0) && (erry2[i]>0)) {
2599 nerry[i] = TMath::Min(erry1[i],erry2[i]);
2600 nerrz[i] = TMath::Min(errz1[i],errz2[i]);
2602 nerry[i] = TMath::Max(erry1[i],erry2[i]);
2603 nerrz[i] = TMath::Max(errz1[i],errz2[i]);
2605 if (TMath::Abs(track10->GetDy(i))>0.000000000000001){
2606 chi21 += track10->GetDy(i)*track10->GetDy(i)/(nerry[i]*nerry[i]);
2607 chi21 += track10->GetDz(i)*track10->GetDz(i)/(nerrz[i]*nerrz[i]);
2610 if (TMath::Abs(track20->GetDy(i))>0.000000000000001){
2611 chi22 += track20->GetDy(i)*track20->GetDy(i)/(nerry[i]*nerry[i]);
2612 chi22 += track20->GetDz(i)*track20->GetDz(i)/(nerrz[i]*nerrz[i]);
2620 Float_t d1 = TMath::Sqrt(track10->GetD(0)*track10->GetD(0)+track10->GetD(1)*track10->GetD(1))+0.1;
2621 Float_t d2 = TMath::Sqrt(track20->GetD(0)*track20->GetD(0)+track20->GetD(1)*track20->GetD(1))+0.1;
2622 Float_t s1 = TMath::Sqrt(track10->GetSigmaY2()*track10->GetSigmaZ2());
2623 Float_t s2 = TMath::Sqrt(track20->GetSigmaY2()*track20->GetSigmaZ2());
2625 w1 = (d2/(d1+d2)+ 2*s2/(s1+s2)+
2626 +s2/(s1+s2)*0.5*(chi22+2.)/(chi21+chi22+4.)
2627 +1.*track10->Pt()/(track10->Pt()+track20->Pt())
2629 w2 = (d1/(d1+d2)+ 2*s1/(s1+s2)+
2630 s1/(s1+s2)*0.5*(chi21+2.)/(chi21+chi22+4.)
2631 +1.*track20->Pt()/(track10->Pt()+track20->Pt())
2634 Double_t sumw = w1+w2;
2638 w1 = (d2+0.5)/(d1+d2+1.);
2639 w2 = (d1+0.5)/(d1+d2+1.);
2641 // Float_t maxmax = w1*track10->fChi2MIP[0]+w2*track20->fChi2MIP[0]+w1*conflict1+w2*conflict2+1.;
2642 //Float_t maxconflicts0 = w1*conflict1+w2*conflict2;
2644 // get pair of "best" hypothesys
2646 Float_t * ny1 = GetNy(trackID1), * nz1 = GetNz(trackID1);
2647 Float_t * ny2 = GetNy(trackID2), * nz2 = GetNz(trackID2);
2649 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
2650 AliITStrackMI * track1=(AliITStrackMI*) arr1->UncheckedAt(itrack1);
2651 //if (track1->fFakeRatio>0) continue;
2652 RegisterClusterTracks(track1,trackID1);
2653 for (Int_t itrack2=0;itrack2<entries2;itrack2++){
2654 AliITStrackMI * track2=(AliITStrackMI*) arr2->UncheckedAt(itrack2);
2656 // Float_t current = w1*track1->fChi2MIP[0]+w2*track2->fChi2MIP[0];
2657 //if (track2->fFakeRatio>0) continue;
2659 RegisterClusterTracks(track2,trackID2);
2660 Int_t list1[6],list2[6];
2661 AliITSRecPoint *clist1[6], *clist2[6] ;
2662 Float_t cconflict1 = GetNumberOfSharedClusters(track1,trackID1,list1,clist1);
2663 Float_t cconflict2 = GetNumberOfSharedClusters(track2,trackID2,list2,clist2);
2664 UnRegisterClusterTracks(track2,trackID2);
2666 if (track1->GetConstrain()) nskipped+=w1*track1->GetNSkipped();
2667 if (track2->GetConstrain()) nskipped+=w2*track2->GetNSkipped();
2668 if (nskipped>0.5) continue;
2670 //if ( w1*conflict1+w2*conflict2>maxconflicts0) continue;
2671 if (conflict1+1<cconflict1) continue;
2672 if (conflict2+1<cconflict2) continue;
2676 for (Int_t i=0;i<6;i++){
2678 Float_t c1 =0.; // conflict coeficients
2680 if (clist1[i]&&clist2[i]){
2683 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-TMath::Max(ny1[i],ny2[i])-TMath::Max(nz1[i],nz2[i]));
2686 deltan = (clist1[i]->GetNz()-TMath::Max(nz1[i],nz2[i]));
2688 c1 = 2./TMath::Max(3.+deltan,2.);
2689 c2 = 2./TMath::Max(3.+deltan,2.);
2695 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-ny1[i]-nz1[i]);
2698 deltan = (clist1[i]->GetNz()-nz1[i]);
2700 c1 = 2./TMath::Max(3.+deltan,2.);
2707 deltan = (clist2[i]->GetNy()+clist2[i]->GetNz()-ny2[i]-nz2[i]);
2710 deltan = (clist2[i]->GetNz()-nz2[i]);
2712 c2 = 2./TMath::Max(3.+deltan,2.);
2717 Double_t chi21=0,chi22=0;
2718 if (TMath::Abs(track1->GetDy(i))>0.) {
2719 chi21 = (track1->GetDy(i)/track1->GetSigmaY(i))*(track1->GetDy(i)/track1->GetSigmaY(i))+
2720 (track1->GetDz(i)/track1->GetSigmaZ(i))*(track1->GetDz(i)/track1->GetSigmaZ(i));
2721 //chi21 = (track1->fDy[i]*track1->fDy[i])/(nerry[i]*nerry[i])+
2722 // (track1->GetDz(i)*track1->GetDz(i))/(nerrz[i]*nerrz[i]);
2724 if (TMath::Abs(track1->GetSigmaY(i)>0.)) c1=1;
2727 if (TMath::Abs(track2->GetDy(i))>0.) {
2728 chi22 = (track2->GetDy(i)/track2->GetSigmaY(i))*(track2->GetDy(i)/track2->GetSigmaY(i))+
2729 (track2->GetDz(i)/track2->GetSigmaZ(i))*(track2->GetDz(i)/track2->GetSigmaZ(i));
2730 //chi22 = (track2->fDy[i]*track2->fDy[i])/(nerry[i]*nerry[i])+
2731 // (track2->fDz[i]*track2->fDz[i])/(nerrz[i]*nerrz[i]);
2734 if (TMath::Abs(track2->GetSigmaY(i)>0.)) c2=1;
2736 sumchi2+=w1*(1.+c1)*(1+c1)*(chi21+c1)+w2*(1.+c2)*(1+c2)*(chi22+c2);
2737 if (chi21>0) sum+=w1;
2738 if (chi22>0) sum+=w2;
2741 Double_t norm = sum-w1*track1->GetNSkipped()-w2*track2->GetNSkipped();
2742 if (norm<0) norm =1/(w1*track1->GetNSkipped()+w2*track2->GetNSkipped());
2743 Double_t normchi2 = 2*conflict+sumchi2/sum;
2744 if ( normchi2 <maxchi2 ){
2747 maxconflicts = conflict;
2751 UnRegisterClusterTracks(track1,trackID1);
2754 // if (maxconflicts<4 && maxchi2<th0){
2755 if (maxchi2<th0*2.){
2756 Float_t orig = track10->GetFakeRatio()*track10->GetNumberOfClusters();
2757 AliITStrackMI* track1=(AliITStrackMI*) arr1->UncheckedAt(index1);
2758 track1->SetChi2MIP(5,maxconflicts);
2759 track1->SetChi2MIP(6,maxchi2);
2760 track1->SetChi2MIP(7,0.01+orig-(track1->GetFakeRatio()*track1->GetNumberOfClusters()));
2761 // track1->UpdateESDtrack(AliESDtrack::kITSin);
2762 track1->SetChi2MIP(8,index1);
2763 fBestTrackIndex[trackID1] =index1;
2764 UpdateESDtrack(track1, AliESDtrack::kITSin);
2766 else if (track10->GetChi2MIP(0)<th1){
2767 track10->SetChi2MIP(5,maxconflicts);
2768 track10->SetChi2MIP(6,maxchi2);
2769 // track10->UpdateESDtrack(AliESDtrack::kITSin);
2770 UpdateESDtrack(track10,AliESDtrack::kITSin);
2773 for (Int_t itrack=0;itrack<entries1;itrack++){
2774 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
2775 UnRegisterClusterTracks(track,trackID1);
2778 for (Int_t itrack=0;itrack<entries2;itrack++){
2779 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
2780 UnRegisterClusterTracks(track,trackID2);
2783 if (track10->GetConstrain()&&track10->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track10->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
2784 &&track10->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track10->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
2785 // if (track10->fChi2MIP[0]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track10->fChi2MIP[1]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
2786 // &&track10->fChi2MIP[2]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track10->fChi2MIP[3]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
2787 RegisterClusterTracks(track10,trackID1);
2789 if (track20->GetConstrain()&&track20->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track20->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
2790 &&track20->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track20->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
2791 //if (track20->fChi2MIP[0]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track20->fChi2MIP[1]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
2792 // &&track20->fChi2MIP[2]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track20->fChi2MIP[3]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
2793 RegisterClusterTracks(track20,trackID2);
2798 //------------------------------------------------------------------------
2799 void AliITStrackerMI::UseClusters(const AliKalmanTrack *t, Int_t from) const {
2800 //--------------------------------------------------------------------
2801 // This function marks clusters assigned to the track
2802 //--------------------------------------------------------------------
2803 AliTracker::UseClusters(t,from);
2805 AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(0));
2806 //if (c->GetQ()>2) c->Use();
2807 if (c->GetSigmaZ2()>0.1) c->Use();
2808 c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(1));
2809 //if (c->GetQ()>2) c->Use();
2810 if (c->GetSigmaZ2()>0.1) c->Use();
2813 //------------------------------------------------------------------------
2814 void AliITStrackerMI::AddTrackHypothesys(AliITStrackMI * track, Int_t esdindex)
2816 //------------------------------------------------------------------
2817 // add track to the list of hypothesys
2818 //------------------------------------------------------------------
2820 if (esdindex>=fTrackHypothesys.GetEntriesFast()) fTrackHypothesys.Expand(esdindex*2+10);
2822 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2824 array = new TObjArray(10);
2825 fTrackHypothesys.AddAt(array,esdindex);
2827 array->AddLast(track);
2829 //------------------------------------------------------------------------
2830 void AliITStrackerMI::SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode)
2832 //-------------------------------------------------------------------
2833 // compress array of track hypothesys
2834 // keep only maxsize best hypothesys
2835 //-------------------------------------------------------------------
2836 if (esdindex>fTrackHypothesys.GetEntriesFast()) return;
2837 if (! (fTrackHypothesys.At(esdindex)) ) return;
2838 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2839 Int_t entries = array->GetEntriesFast();
2841 //- find preliminary besttrack as a reference
2842 Float_t minchi2=10000;
2844 AliITStrackMI * besttrack=0;
2845 for (Int_t itrack=0;itrack<array->GetEntriesFast();itrack++){
2846 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2847 if (!track) continue;
2848 Float_t chi2 = NormalizedChi2(track,0);
2850 Int_t tpcLabel=track->GetESDtrack()->GetTPCLabel();
2851 track->SetLabel(tpcLabel);
2853 track->SetFakeRatio(1.);
2854 CookLabel(track,0.); //For comparison only
2856 //if (chi2<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track->fFakeRatio==0){
2857 if (chi2<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)){
2858 if (track->GetNumberOfClusters()<maxn) continue;
2859 maxn = track->GetNumberOfClusters();
2866 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
2867 delete array->RemoveAt(itrack);
2871 if (!besttrack) return;
2874 //take errors of best track as a reference
2875 Float_t *erry = GetErrY(esdindex), *errz = GetErrZ(esdindex);
2876 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
2877 for (Int_t i=0;i<6;i++) {
2878 if (besttrack->GetClIndex(i)>0){
2879 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2880 errz[i] = besttrack->GetSigmaZ(i); errz[i+6] = besttrack->GetSigmaZ(i+6);
2881 ny[i] = besttrack->GetNy(i);
2882 nz[i] = besttrack->GetNz(i);
2886 // calculate normalized chi2
2888 Float_t * chi2 = new Float_t[entries];
2889 Int_t * index = new Int_t[entries];
2890 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2891 for (Int_t itrack=0;itrack<entries;itrack++){
2892 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2894 track->SetChi2MIP(0,GetNormalizedChi2(track, mode));
2895 if (track->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0))
2896 chi2[itrack] = track->GetChi2MIP(0);
2898 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
2899 delete array->RemoveAt(itrack);
2905 TMath::Sort(entries,chi2,index,kFALSE);
2906 besttrack = (AliITStrackMI*)array->At(index[0]);
2907 if (besttrack&&besttrack->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)){
2908 for (Int_t i=0;i<6;i++){
2909 if (besttrack->GetClIndex(i)>0){
2910 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2911 errz[i] = besttrack->GetSigmaZ(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2912 ny[i] = besttrack->GetNy(i);
2913 nz[i] = besttrack->GetNz(i);
2918 // calculate one more time with updated normalized errors
2919 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2920 for (Int_t itrack=0;itrack<entries;itrack++){
2921 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
2923 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
2924 if (track->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0))
2925 chi2[itrack] = track->GetChi2MIP(0)-0*(track->GetNumberOfClusters()+track->GetNDeadZone());
2928 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
2929 delete array->RemoveAt(itrack);
2934 entries = array->GetEntriesFast();
2938 TObjArray * newarray = new TObjArray();
2939 TMath::Sort(entries,chi2,index,kFALSE);
2940 besttrack = (AliITStrackMI*)array->At(index[0]);
2943 for (Int_t i=0;i<6;i++){
2944 if (besttrack->GetNz(i)>0&&besttrack->GetNy(i)>0){
2945 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2946 errz[i] = besttrack->GetSigmaZ(i); errz[i+6] = besttrack->GetSigmaZ(i+6);
2947 ny[i] = besttrack->GetNy(i);
2948 nz[i] = besttrack->GetNz(i);
2951 besttrack->SetChi2MIP(0,GetNormalizedChi2(besttrack,mode));
2952 Float_t minchi2 = TMath::Min(besttrack->GetChi2MIP(0)+5.+besttrack->GetNUsed(), double(AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)));
2953 Float_t minn = besttrack->GetNumberOfClusters()-3;
2955 for (Int_t i=0;i<entries;i++){
2956 AliITStrackMI * track = (AliITStrackMI*)array->At(index[i]);
2957 if (!track) continue;
2958 if (accepted>maxcut) break;
2959 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
2960 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
2961 if (track->GetNumberOfClusters()<6 && (track->GetChi2MIP(0)+track->GetNUsed()>minchi2)){
2962 delete array->RemoveAt(index[i]);
2966 Bool_t shortbest = !track->GetConstrain() && track->GetNumberOfClusters()<6;
2967 if ((track->GetChi2MIP(0)+track->GetNUsed()<minchi2 && track->GetNumberOfClusters()>=minn) ||shortbest){
2968 if (!shortbest) accepted++;
2970 newarray->AddLast(array->RemoveAt(index[i]));
2971 for (Int_t i=0;i<6;i++){
2973 erry[i] = track->GetSigmaY(i); erry[i+6] = track->GetSigmaY(i+6);
2974 errz[i] = track->GetSigmaZ(i); errz[i] = track->GetSigmaZ(i+6);
2975 ny[i] = track->GetNy(i);
2976 nz[i] = track->GetNz(i);
2981 delete array->RemoveAt(index[i]);
2985 delete fTrackHypothesys.RemoveAt(esdindex);
2986 fTrackHypothesys.AddAt(newarray,esdindex);
2990 delete fTrackHypothesys.RemoveAt(esdindex);
2996 //------------------------------------------------------------------------
2997 AliITStrackMI * AliITStrackerMI::GetBestHypothesys(Int_t esdindex, AliITStrackMI * original, Int_t checkmax)
2999 //-------------------------------------------------------------
3000 // try to find best hypothesy
3001 // currently - minimal chi2 of track+backpropagated track+matching to the tpc track
3002 //-------------------------------------------------------------
3003 if (fTrackHypothesys.GetEntriesFast()<=esdindex) return 0;
3004 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
3005 if (!array) return 0;
3006 Int_t entries = array->GetEntriesFast();
3007 if (!entries) return 0;
3008 Float_t minchi2 = 100000;
3009 AliITStrackMI * besttrack=0;
3011 AliITStrackMI * backtrack = new AliITStrackMI(*original);
3012 AliITStrackMI * forwardtrack = new AliITStrackMI(*original);
3013 Double_t xyzVtx[]={GetX(),GetY(),GetZ()};
3014 Double_t ersVtx[]={GetSigmaX()/3.,GetSigmaY()/3.,GetSigmaZ()/3.};
3016 for (Int_t i=0;i<entries;i++){
3017 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
3018 if (!track) continue;
3019 Float_t sigmarfi,sigmaz;
3020 GetDCASigma(track,sigmarfi,sigmaz);
3021 track->SetDnorm(0,sigmarfi);
3022 track->SetDnorm(1,sigmaz);
3024 track->SetChi2MIP(1,1000000);
3025 track->SetChi2MIP(2,1000000);
3026 track->SetChi2MIP(3,1000000);
3029 backtrack = new(backtrack) AliITStrackMI(*track);
3030 if (track->GetConstrain()) {
3032 if (!backtrack->PropagateToTGeo(krInsidePipe,1)) continue;
3034 if (!backtrack->PropagateTo(krInsidePipe,kdPipe,kX0Be)) continue;
3036 if (!backtrack->Improve(0,xyzVtx,ersVtx)) continue;
3037 backtrack->ResetCovariance(10.);
3039 backtrack->ResetCovariance(10.);
3041 backtrack->ResetClusters();
3043 Double_t x = original->GetX();
3044 if (!RefitAt(x,backtrack,track)) continue;
3046 track->SetChi2MIP(1,NormalizedChi2(backtrack,0));
3047 //for (Int_t i=2;i<6;i++){track->fDy[i]+=backtrack->fDy[i]; track->fDz[i]+=backtrack->fDz[i];}
3048 if (track->GetChi2MIP(1)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)*6.) continue;
3049 track->SetChi22(GetMatchingChi2(backtrack,original));
3051 if ((track->GetConstrain()) && track->GetChi22()>90.) continue;
3052 if ((!track->GetConstrain()) && track->GetChi22()>30.) continue;
3053 if ( track->GetChi22()/track->GetNumberOfClusters()>11.) continue;
3056 if (!(track->GetConstrain())&&track->GetChi2MIP(1)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)) continue;
3058 //forward track - without constraint
3059 forwardtrack = new(forwardtrack) AliITStrackMI(*original);
3060 forwardtrack->ResetClusters();
3062 RefitAt(x,forwardtrack,track);
3063 track->SetChi2MIP(2,NormalizedChi2(forwardtrack,0));
3064 if (track->GetChi2MIP(2)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)*6.0) continue;
3065 if (!(track->GetConstrain())&&track->GetChi2MIP(2)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)) continue;
3067 //track->fD[0] = forwardtrack->GetD(GetX(),GetY());
3068 //track->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
3069 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),track->GetDP()); //I.B.
3070 forwardtrack->SetD(0,track->GetD(0));
3071 forwardtrack->SetD(1,track->GetD(1));
3074 AliITSRecPoint* clist[6];
3075 track->SetChi2MIP(4,GetNumberOfSharedClusters(track,esdindex,list,clist));
3076 if ( (!track->GetConstrain()) && track->GetChi2MIP(4)>1.0) continue;
3079 track->SetChi2MIP(3,GetInterpolatedChi2(forwardtrack,backtrack));
3080 if ( (track->GetChi2MIP(3)>6.*AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3))) continue;
3081 if ( (!track->GetConstrain()) && (track->GetChi2MIP(3)>2*AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3))) {
3082 track->SetChi2MIP(3,1000);
3085 Double_t chi2 = track->GetChi2MIP(0)+track->GetNUsed();
3087 for (Int_t ichi=0;ichi<5;ichi++){
3088 forwardtrack->SetChi2MIP(ichi, track->GetChi2MIP(ichi));
3090 if (chi2 < minchi2){
3091 //besttrack = new AliITStrackMI(*forwardtrack);
3093 besttrack->SetLabel(track->GetLabel());
3094 besttrack->SetFakeRatio(track->GetFakeRatio());
3096 //original->fD[0] = forwardtrack->GetD(GetX(),GetY());
3097 //original->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
3098 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),original->GetDP()); //I.B.
3102 delete forwardtrack;
3104 for (Int_t i=0;i<entries;i++){
3105 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
3106 if (!track) continue;
3108 if (accepted>checkmax || track->GetChi2MIP(3)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)*6. ||
3109 (track->GetNumberOfClusters()<besttrack->GetNumberOfClusters()-1.)||
3110 track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*besttrack->GetNUsed()+3.){
3111 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3112 delete array->RemoveAt(i);
3122 SortTrackHypothesys(esdindex,checkmax,1);
3123 array = (TObjArray*) fTrackHypothesys.At(esdindex);
3124 if (!array) return 0; // PH What can be the reason? Check SortTrackHypothesys
3125 besttrack = (AliITStrackMI*)array->At(0);
3126 if (!besttrack) return 0;
3127 besttrack->SetChi2MIP(8,0);
3128 fBestTrackIndex[esdindex]=0;
3129 entries = array->GetEntriesFast();
3130 AliITStrackMI *longtrack =0;
3132 Float_t minn=besttrack->GetNumberOfClusters()+besttrack->GetNDeadZone();
3133 for (Int_t itrack=entries-1;itrack>0;itrack--){
3134 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
3135 if (!track->GetConstrain()) continue;
3136 if (track->GetNumberOfClusters()+track->GetNDeadZone()<minn) continue;
3137 if (track->GetChi2MIP(0)-besttrack->GetChi2MIP(0)>0.0) continue;
3138 if (track->GetChi2MIP(0)>4.) continue;
3139 minn = track->GetNumberOfClusters()+track->GetNDeadZone();
3142 //if (longtrack) besttrack=longtrack;
3145 AliITSRecPoint * clist[6];
3146 Float_t shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
3147 if (besttrack->GetConstrain()&&besttrack->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&besttrack->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3148 &&besttrack->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&besttrack->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3149 RegisterClusterTracks(besttrack,esdindex);
3156 Int_t sharedtrack = GetOverlapTrack(besttrack, esdindex, nshared, list, overlist);
3157 if (sharedtrack>=0){
3159 besttrack = GetBest2Tracks(esdindex,sharedtrack,10,5.5);
3161 shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
3167 if (shared>2.5) return 0;
3168 if (shared>1.0) return besttrack;
3170 // Don't sign clusters if not gold track
3172 if (!besttrack->IsGoldPrimary()) return besttrack;
3173 if (besttrack->GetESDtrack()->GetKinkIndex(0)!=0) return besttrack; //track belong to kink
3175 if (fConstraint[fPass]){
3179 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
3180 for (Int_t i=0;i<6;i++){
3181 Int_t index = besttrack->GetClIndex(i);
3182 if (index<=0) continue;
3183 Int_t ilayer = (index & 0xf0000000) >> 28;
3184 if (besttrack->GetSigmaY(ilayer)<0.00000000001) continue;
3185 AliITSRecPoint *c = (AliITSRecPoint*)GetCluster(index);
3187 if (ilayer>3&&c->GetNy()+c->GetNz()>6) continue;
3188 if ( (c->GetNy()+c->GetNz() )> ny[i]+nz[i]+0.7) continue; //shared track
3189 if ( c->GetNz()> nz[i]+0.7) continue; //shared track
3190 if ( ilayer>2&& besttrack->GetNormQ(ilayer)/besttrack->GetExpQ()>1.5) continue;
3191 //if ( c->GetNy()> ny[i]+0.7) continue; //shared track
3193 Bool_t cansign = kTRUE;
3194 for (Int_t itrack=0;itrack<entries; itrack++){
3195 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
3196 if (!track) continue;
3197 if (track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*shared+1.) break;
3198 if ( (track->GetClIndex(ilayer)>0) && (track->GetClIndex(ilayer)!=besttrack->GetClIndex(ilayer))){
3204 if (TMath::Abs(besttrack->GetDy(ilayer)/besttrack->GetSigmaY(ilayer))>3.) continue;
3205 if (TMath::Abs(besttrack->GetDz(ilayer)/besttrack->GetSigmaZ(ilayer))>3.) continue;
3206 if (!c->IsUsed()) c->Use();
3212 //------------------------------------------------------------------------
3213 void AliITStrackerMI::GetBestHypothesysMIP(TObjArray &itsTracks)
3216 // get "best" hypothesys
3219 Int_t nentries = itsTracks.GetEntriesFast();
3220 for (Int_t i=0;i<nentries;i++){
3221 AliITStrackMI* track = (AliITStrackMI*)itsTracks.At(i);
3222 if (!track) continue;
3223 TObjArray * array = (TObjArray*) fTrackHypothesys.At(i);
3224 if (!array) continue;
3225 if (array->GetEntriesFast()<=0) continue;
3227 AliITStrackMI* longtrack=0;
3229 Float_t maxchi2=1000;
3230 for (Int_t j=0;j<array->GetEntriesFast();j++){
3231 AliITStrackMI* track = (AliITStrackMI*)array->At(j);
3232 if (!track) continue;
3233 if (track->GetGoldV0()) {
3234 longtrack = track; //gold V0 track taken
3237 if (track->GetNumberOfClusters()+track->GetNDeadZone()<minn) continue;
3238 Float_t chi2 = track->GetChi2MIP(0);
3240 if (!track->GetGoldV0()&&track->GetConstrain()==kFALSE) chi2+=5;
3242 if (track->GetNumberOfClusters()+track->GetNDeadZone()>minn) maxchi2 = track->GetChi2MIP(0);
3244 if (chi2 > maxchi2) continue;
3245 minn= track->GetNumberOfClusters()+track->GetNDeadZone();
3252 AliITStrackMI * besttrack = (AliITStrackMI*)array->At(0);
3253 if (!longtrack) {longtrack = besttrack;}
3254 else besttrack= longtrack;
3258 AliITSRecPoint * clist[6];
3259 Float_t shared = GetNumberOfSharedClusters(longtrack,i,list,clist);
3261 track->SetNUsed(shared);
3262 track->SetNSkipped(besttrack->GetNSkipped());
3263 track->SetChi2MIP(0,besttrack->GetChi2MIP(0));
3265 if(!AliITSReconstructor::GetRecoParam()->GetAllowSharedClusters()) continue;
3269 Int_t sharedtrack = GetOverlapTrack(longtrack, i, nshared, list, overlist);
3270 //if (sharedtrack==-1) sharedtrack=0;
3271 if (sharedtrack>=0) {
3272 besttrack = GetBest2Tracks(i,sharedtrack,10,5.5);
3275 if (besttrack&&fAfterV0) {
3276 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3278 if (besttrack&&fConstraint[fPass])
3279 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3280 if (besttrack->GetChi2MIP(0)+besttrack->GetNUsed()>1.5 && fConstraint[fPass]) {
3281 if ( TMath::Abs(besttrack->GetD(0))>0.1 ||
3282 TMath::Abs(besttrack->GetD(1))>0.1 ) track->SetReconstructed(kFALSE);
3288 //------------------------------------------------------------------------
3289 void AliITStrackerMI::CookLabel(AliITStrackMI *track,Float_t wrong) const {
3290 //--------------------------------------------------------------------
3291 //This function "cooks" a track label. If label<0, this track is fake.
3292 //--------------------------------------------------------------------
3295 if ( track->GetESDtrack()) tpcLabel = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
3297 track->SetChi2MIP(9,0);
3299 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3300 Int_t cindex = track->GetClusterIndex(i);
3301 Int_t l=(cindex & 0xf0000000) >> 28;
3302 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
3304 for (Int_t ind=0;ind<3;ind++){
3306 if (cl->GetLabel(ind)==tpcLabel) isWrong=0;
3308 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
3311 Int_t nclusters = track->GetNumberOfClusters();
3312 if (nclusters > 0) //PH Some tracks don't have any cluster
3313 track->SetFakeRatio(double(nwrong)/double(nclusters));
3315 if (track->GetFakeRatio()>wrong) track->SetLabel(-tpcLabel);
3317 track->SetLabel(tpcLabel);
3321 //------------------------------------------------------------------------
3322 void AliITStrackerMI::CookdEdx(AliITStrackMI* track)
3327 //AliITSRecPoint * clist[6];
3328 // Int_t shared = GetNumberOfSharedClusters(track,index,list,clist);
3331 track->SetChi2MIP(9,0);
3332 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3333 Int_t cindex = track->GetClusterIndex(i);
3334 Int_t l=(cindex & 0xf0000000) >> 28;
3335 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
3336 Int_t lab = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
3338 for (Int_t ind=0;ind<3;ind++){
3339 if (cl->GetLabel(ind)==lab) isWrong=0;
3341 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
3343 //if (l>3 && (cl->GetNy()>4) || (cl->GetNz()>4)) continue; //shared track
3344 //if (l>3&& !(cl->GetType()==1||cl->GetType()==10)) continue;
3345 //if (l<4&& !(cl->GetType()==1)) continue;
3346 dedx[accepted]= track->GetSampledEdx(i);
3347 //dedx[accepted]= track->fNormQ[l];
3355 TMath::Sort(accepted,dedx,indexes,kFALSE);
3358 Double_t nl=low*accepted, nu =up*accepted;
3360 Float_t sumweight =0;
3361 for (Int_t i=0; i<accepted; i++) {
3363 if (i<nl+0.1) weight = TMath::Max(1.-(nl-i),0.);
3364 if (i>nu-1) weight = TMath::Max(nu-i,0.);
3365 sumamp+= dedx[indexes[i]]*weight;
3368 track->SetdEdx(sumamp/sumweight);
3370 //------------------------------------------------------------------------
3371 void AliITStrackerMI::MakeCoefficients(Int_t ntracks){
3374 if (fCoefficients) delete []fCoefficients;
3375 fCoefficients = new Float_t[ntracks*48];
3376 for (Int_t i=0;i<ntracks*48;i++) fCoefficients[i]=-1.;
3378 //------------------------------------------------------------------------
3379 Double_t AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer)
3385 Float_t theta = track->GetTgl();
3386 Float_t phi = track->GetSnp();
3387 phi = TMath::Sqrt(phi*phi/(1.-phi*phi));
3388 GetError(layer,cluster,theta,phi,track->GetExpQ(),erry,errz);
3389 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz);
3391 GetNTeor(layer,cluster, theta,phi,ny,nz);
3392 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
3394 chi2+=0.5*TMath::Min(delta/2,2.);
3395 chi2+=2.*cluster->GetDeltaProbability();
3398 track->SetNy(layer,ny);
3399 track->SetNz(layer,nz);
3400 track->SetSigmaY(layer,erry);
3401 track->SetSigmaZ(layer, errz);
3402 //track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt(1+theta*theta+phi*phi);
3403 track->SetNormQ(layer,cluster->GetQ()/TMath::Sqrt((1.+ track->GetTgl()*track->GetTgl())/(1.- track->GetSnp()*track->GetSnp())));
3408 Int_t AliITStrackerMI::UpdateMI(AliITStrackMI* track, const AliITSRecPoint* cl,Double_t chi2,Int_t index) const
3413 Int_t layer = (index & 0xf0000000) >> 28;
3414 track->SetClIndex(layer, index);
3415 if ( (layer>1) &&track->GetNormQ(layer)/track->GetExpQ()<0.5 ) {
3416 chi2+= (0.5-track->GetNormQ(layer)/track->GetExpQ())*10.;
3417 track->SetdEdxMismatch(track->GetdEdxMismatch()+(0.5-track->GetNormQ(layer)/track->GetExpQ())*10.);
3420 if (cl->GetQ()<=0) return 0; // ingore the "virtual" clusters
3422 //Float_t clxyz[3]; cl->GetGlobalXYZ(clxyz);Double_t trxyz[3]; track->GetXYZ(trxyz);printf("gtr %f %f %f\n",trxyz[0],trxyz[1],trxyz[2]);printf("gcl %f %f %f\n",clxyz[0],clxyz[1],clxyz[2]);
3425 // Take into account the mis-alignment
3426 Double_t x=track->GetX()+cl->GetX();
3427 if (!track->PropagateTo(x,0.,0.)) return 0;
3429 return track->UpdateMI(cl->GetY(),cl->GetZ(),track->GetSigmaY(layer),track->GetSigmaZ(layer),chi2,index);
3432 void AliITStrackerMI::GetNTeor(Int_t layer, const AliITSRecPoint* /*cl*/, Float_t theta, Float_t phi, Float_t &ny, Float_t &nz)
3438 ny = 1.+TMath::Abs(phi)*3.2;
3439 nz = 1.+TMath::Abs(theta)*0.34;
3443 ny = 1.+TMath::Abs(phi)*3.2;
3444 nz = 1.+TMath::Abs(theta)*0.28;
3449 ny = 2.02+TMath::Abs(phi)*1.95;
3450 nz = 2.02+TMath::Abs(phi)*2.35;
3453 ny = 6.6-2.7*TMath::Abs(phi);
3454 nz = 2.8-3.11*TMath::Abs(phi)+0.45*TMath::Abs(theta);
3459 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)
3461 //calculate cluster position error
3464 GetNTeor(layer, cl,theta,phi,ny,nz);
3465 erry = TMath::Sqrt(cl->GetSigmaY2());
3466 errz = TMath::Sqrt(cl->GetSigmaZ2());
3470 if (TMath::Abs(ny-cl->GetNy())>0.6) {
3471 if (ny<cl->GetNy()){
3472 erry*=0.4+TMath::Abs(ny-cl->GetNy());
3473 errz*=0.4+TMath::Abs(ny-cl->GetNy());
3475 erry*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
3476 errz*=0.7+0.5*TMath::Abs(ny-cl->GetNy());
3479 if (TMath::Abs(nz-cl->GetNz())>1.) {
3480 erry*=TMath::Abs(nz-cl->GetNz());
3481 errz*=TMath::Abs(nz-cl->GetNz());
3485 erry= TMath::Min(erry,float(0.0050));
3486 errz= TMath::Min(errz,float(0.0300));
3492 //factor 1.8 appears in new simulation
3495 if (cl->GetNy()==100||cl->GetNz()==100){
3500 if (cl->GetNy()+cl->GetNz()>12){
3505 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
3506 Float_t chargematch = TMath::Max(double(normq/expQ),2.);
3508 if (cl->GetType()==1 || cl->GetType()==10 ){
3509 if (chargematch<1.0 || (cl->GetNy()+cl->GetNz()<nz+ny+0.5)){
3511 erry = 0.00094*scale;
3514 if (cl->GetNy()+cl->GetNz()<nz+ny+1.2){
3519 erry = 0.0027*scale;
3520 errz = TMath::Min(0.028*(chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.15)*scale;
3523 if (cl->GetType()==2 || cl->GetType()==11 ){
3524 erry = TMath::Min(0.0010*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.05)*scale;
3525 errz = TMath::Min(0.025*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.5)*scale;
3529 if (cl->GetType()>100 ){
3530 if ((chargematch+cl->GetNy()+cl->GetNz()-nz-ny<1.5)){
3532 erry = 0.00096*scale;
3535 if (cl->GetNy()+cl->GetNz()-nz-ny<1){
3537 erry = 0.0025*scale;
3541 errz = TMath::Min(0.05*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.4)*scale;
3542 erry = TMath::Min(0.003*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.05)*scale;
3545 Float_t diff = cl->GetNy()+cl->GetNz()-ny-nz;
3549 if (cl->GetType()==5||cl->GetType()==6||cl->GetType()==7||cl->GetType()==8){
3559 Float_t normq = cl->GetQ()/(TMath::Sqrt(1+theta*theta+phi*phi));
3560 Float_t chargematch = normq/expQ;
3562 Int_t cnz = cl->GetNz()%10;
3564 if (cl->GetType()==1){
3565 if (chargematch<1.25){
3566 erry = 0.0028*(1.+6./cl->GetQ()); // gold clusters
3569 erry = 0.003*chargematch;
3570 if (cl->GetNz()==3) erry*=1.5;
3572 if (chargematch<1.0){
3573 errz = 0.0011*(1.+6./cl->GetQ());
3576 errz = 0.002*(1+2*(chargematch-1.));
3580 errz*=1.4*(cnz-nz+0.5);
3583 if (cl->GetType()>1){
3585 erry = 0.00385*(1.+6./cl->GetQ()); // gold clusters
3586 errz = 0.0016*(1.+6./cl->GetQ());
3589 errz = 0.0014*(1+3*(chargematch-1.));
3590 erry = 0.003*(1+3*(chargematch-1.));
3594 errz*=1.4*(cnz-nz+0.5);
3598 if (TMath::Abs(cl->GetY())>2.5){
3599 factorz*=1+2*(TMath::Abs(cl->GetY())-2.5);
3601 if (TMath::Abs(cl->GetY())<1){
3602 factorz*=1.+0.5*TMath::Abs(TMath::Abs(cl->GetY())-1.);
3604 factorz= TMath::Min(factorz,float(4.));
3607 erry= TMath::Min(erry,float(0.05));
3608 errz= TMath::Min(errz,float(0.05));
3611 //------------------------------------------------------------------------
3612 void AliITStrackerMI::GetDCASigma(AliITStrackMI* track, Float_t & sigmarfi, Float_t &sigmaz)
3615 //DCA sigmas parameterization
3616 //to be paramterized using external parameters in future
3619 sigmarfi = 0.0040+1.4 *TMath::Abs(track->GetC())+332.*track->GetC()*track->GetC();
3620 sigmaz = 0.0110+4.37*TMath::Abs(track->GetC());
3624 void AliITStrackerMI::SignDeltas( TObjArray *ClusterArray, Float_t vz)
3628 Int_t entries = ClusterArray->GetEntriesFast();
3629 if (entries<4) return;
3630 AliITSRecPoint* cluster = (AliITSRecPoint*)ClusterArray->At(0);
3631 Int_t layer = cluster->GetLayer();
3632 if (layer>1) return;
3634 Int_t ncandidates=0;
3635 Float_t r = (layer>0)? 7:4;
3637 for (Int_t i=0;i<entries;i++){
3638 AliITSRecPoint* cl0 = (AliITSRecPoint*)ClusterArray->At(i);
3639 Float_t nz = 1+TMath::Abs((cl0->GetZ()-vz)/r);
3640 if (cl0->GetNy()+cl0->GetNz()<=5+2*layer+nz) continue;
3641 index[ncandidates] = i; //candidate to belong to delta electron track
3643 if (cl0->GetNy()+cl0->GetNz()>9+2*layer+nz) {
3644 cl0->SetDeltaProbability(1);
3650 for (Int_t i=0;i<ncandidates;i++){
3651 AliITSRecPoint* cl0 = (AliITSRecPoint*)ClusterArray->At(index[i]);
3652 if (cl0->GetDeltaProbability()>0.8) continue;
3655 Float_t y[100],z[100],sumy,sumz,sumy2, sumyz, sumw;
3656 sumy=sumz=sumy2=sumyz=sumw=0.0;
3657 for (Int_t j=0;j<ncandidates;j++){
3659 AliITSRecPoint* cl1 = (AliITSRecPoint*)ClusterArray->At(index[j]);
3661 Float_t dz = cl0->GetZ()-cl1->GetZ();
3662 Float_t dy = cl0->GetY()-cl1->GetY();
3663 if (TMath::Sqrt(dz*dz+dy*dy)<0.2){
3664 Float_t weight = cl1->GetNy()+cl1->GetNz()-2;
3665 y[ncl] = cl1->GetY();
3666 z[ncl] = cl1->GetZ();
3667 sumy+= y[ncl]*weight;
3668 sumz+= z[ncl]*weight;
3669 sumy2+=y[ncl]*y[ncl]*weight;
3670 sumyz+=y[ncl]*z[ncl]*weight;
3675 if (ncl<4) continue;
3676 Float_t det = sumw*sumy2 - sumy*sumy;
3678 if (TMath::Abs(det)>0.01){
3679 Float_t z0 = (sumy2*sumz - sumy*sumyz)/det;
3680 Float_t k = (sumyz*sumw - sumy*sumz)/det;
3681 delta = TMath::Abs(cl0->GetZ()-(z0+k*cl0->GetY()));
3684 Float_t z0 = sumyz/sumy;
3685 delta = TMath::Abs(cl0->GetZ()-z0);
3688 cl0->SetDeltaProbability(1-20.*delta);
3692 //------------------------------------------------------------------------
3693 void AliITStrackerMI::UpdateESDtrack(AliITStrackMI* track, ULong_t flags) const
3697 track->UpdateESDtrack(flags);
3698 AliITStrackMI * oldtrack = (AliITStrackMI*)(track->GetESDtrack()->GetITStrack());
3699 if (oldtrack) delete oldtrack;
3700 track->GetESDtrack()->SetITStrack(new AliITStrackMI(*track));
3701 if (TMath::Abs(track->GetDnorm(1))<0.000000001){
3702 printf("Problem\n");
3705 //------------------------------------------------------------------------
3706 Int_t AliITStrackerMI::GetNearestLayer(const Double_t *xr) const{
3708 //Get nearest upper layer close to the point xr.
3709 // rough approximation
3711 const Float_t kRadiuses[6]={4,6.5,15.03,24.,38.5,43.7};
3712 Float_t radius = TMath::Sqrt(xr[0]*xr[0]+xr[1]*xr[1]);
3714 for (Int_t i=0;i<6;i++){
3715 if (radius<kRadiuses[i]){
3722 //------------------------------------------------------------------------
3723 void AliITStrackerMI::UpdateTPCV0(AliESDEvent *event){
3725 //try to update, or reject TPC V0s
3727 Int_t nv0s = event->GetNumberOfV0s();
3728 Int_t nitstracks = fTrackHypothesys.GetEntriesFast();
3730 for (Int_t i=0;i<nv0s;i++){
3731 AliESDv0 * vertex = event->GetV0(i);
3732 Int_t ip = vertex->GetIndex(0);
3733 Int_t im = vertex->GetIndex(1);
3735 TObjArray * arrayp = (ip<nitstracks) ? (TObjArray*)fTrackHypothesys.At(ip):0;
3736 TObjArray * arraym = (im<nitstracks) ? (TObjArray*)fTrackHypothesys.At(im):0;
3737 AliITStrackMI * trackp = (arrayp!=0) ? (AliITStrackMI*)arrayp->At(0):0;
3738 AliITStrackMI * trackm = (arraym!=0) ? (AliITStrackMI*)arraym->At(0):0;
3742 if (trackp->GetNumberOfClusters()+trackp->GetNDeadZone()>5.5){
3743 if (trackp->GetConstrain()&&trackp->GetChi2MIP(0)<3) vertex->SetStatus(-100);
3744 if (!trackp->GetConstrain()&&trackp->GetChi2MIP(0)<2) vertex->SetStatus(-100);
3749 if (trackm->GetNumberOfClusters()+trackm->GetNDeadZone()>5.5){
3750 if (trackm->GetConstrain()&&trackm->GetChi2MIP(0)<3) vertex->SetStatus(-100);
3751 if (!trackm->GetConstrain()&&trackm->GetChi2MIP(0)<2) vertex->SetStatus(-100);
3754 if (vertex->GetStatus()==-100) continue;
3756 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
3757 Int_t clayer = GetNearestLayer(xrp); //I.B.
3758 vertex->SetNBefore(clayer); //
3759 vertex->SetChi2Before(9*clayer); //
3760 vertex->SetNAfter(6-clayer); //
3761 vertex->SetChi2After(0); //
3763 if (clayer >1 ){ // calculate chi2 before vertex
3764 Float_t chi2p = 0, chi2m=0;
3767 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
3768 if (trackp->GetClIndex(ilayer)>0){
3769 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+
3770 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));
3781 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
3782 if (trackm->GetClIndex(ilayer)>0){
3783 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+
3784 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));
3793 vertex->SetChi2Before(TMath::Min(chi2p,chi2m));
3794 if (TMath::Min(chi2p,chi2m)/Float_t(clayer)<4) vertex->SetStatus(-10); // track exist before vertex
3797 if (clayer < 5 ){ // calculate chi2 after vertex
3798 Float_t chi2p = 0, chi2m=0;
3800 if (trackp&&TMath::Abs(trackp->GetTgl())<1.){
3801 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
3802 if (trackp->GetClIndex(ilayer)>0){
3803 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+
3804 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));
3814 if (trackm&&TMath::Abs(trackm->GetTgl())<1.){
3815 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
3816 if (trackm->GetClIndex(ilayer)>0){
3817 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+
3818 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));
3827 vertex->SetChi2After(TMath::Max(chi2p,chi2m));
3828 if (TMath::Max(chi2m,chi2p)/Float_t(6-clayer)>9) vertex->SetStatus(-20); // track not found in ITS
3833 //------------------------------------------------------------------------
3834 void AliITStrackerMI::FindV02(AliESDEvent *event)
3839 // Cuts on DCA - R dependent
3840 // max distance DCA between 2 tracks cut
3841 // maxDist = TMath::Min(kMaxDist,kMaxDist0+pvertex->GetRr()*kMaxDist);
3843 const Float_t kMaxDist0 = 0.1;
3844 const Float_t kMaxDist1 = 0.1;
3845 const Float_t kMaxDist = 1;
3846 const Float_t kMinPointAngle = 0.85;
3847 const Float_t kMinPointAngle2 = 0.99;
3848 const Float_t kMinR = 0.5;
3849 const Float_t kMaxR = 220;
3850 //const Float_t kCausality0Cut = 0.19;
3851 //const Float_t kLikelihood01Cut = 0.25;
3852 //const Float_t kPointAngleCut = 0.9996;
3853 const Float_t kCausality0Cut = 0.19;
3854 const Float_t kLikelihood01Cut = 0.45;
3855 const Float_t kLikelihood1Cut = 0.5;
3856 const Float_t kCombinedCut = 0.55;
3860 TTreeSRedirector &cstream = *fDebugStreamer;
3861 Int_t ntracks = event->GetNumberOfTracks();
3862 Int_t nitstracks = fTrackHypothesys.GetEntriesFast();
3863 fOriginal.Expand(ntracks);
3864 fTrackHypothesys.Expand(ntracks);
3865 fBestHypothesys.Expand(ntracks);
3867 AliHelix * helixes = new AliHelix[ntracks+2];
3868 TObjArray trackarray(ntracks+2); //array with tracks - with vertex constrain
3869 TObjArray trackarrayc(ntracks+2); //array of "best tracks" - without vertex constrain
3870 TObjArray trackarrayl(ntracks+2); //array of "longest tracks" - without vertex constrain
3871 Bool_t * forbidden = new Bool_t [ntracks+2];
3872 Int_t *itsmap = new Int_t [ntracks+2];
3873 Float_t *dist = new Float_t[ntracks+2];
3874 Float_t *normdist0 = new Float_t[ntracks+2];
3875 Float_t *normdist1 = new Float_t[ntracks+2];
3876 Float_t *normdist = new Float_t[ntracks+2];
3877 Float_t *norm = new Float_t[ntracks+2];
3878 Float_t *maxr = new Float_t[ntracks+2];
3879 Float_t *minr = new Float_t[ntracks+2];
3880 Float_t *minPointAngle= new Float_t[ntracks+2];
3882 AliV0 *pvertex = new AliV0;
3883 AliITStrackMI * dummy= new AliITStrackMI;
3885 AliITStrackMI trackat0; //temporary track for DCA calculation
3887 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
3889 // make ITS - ESD map
3891 for (Int_t itrack=0;itrack<ntracks+2;itrack++) {
3892 itsmap[itrack] = -1;
3893 forbidden[itrack] = kFALSE;
3894 maxr[itrack] = kMaxR;
3895 minr[itrack] = kMinR;
3896 minPointAngle[itrack] = kMinPointAngle;
3898 for (Int_t itrack=0;itrack<nitstracks;itrack++){
3899 AliITStrackMI * original = (AliITStrackMI*)(fOriginal.At(itrack));
3900 Int_t esdindex = original->GetESDtrack()->GetID();
3901 itsmap[esdindex] = itrack;
3904 // create ITS tracks from ESD tracks if not done before
3906 for (Int_t itrack=0;itrack<ntracks;itrack++){
3907 if (itsmap[itrack]>=0) continue;
3908 AliITStrackMI * tpctrack = new AliITStrackMI(*(event->GetTrack(itrack)));
3909 //tpctrack->fD[0] = tpctrack->GetD(GetX(),GetY());
3910 //tpctrack->fD[1] = tpctrack->GetZat(GetX())-GetZ();
3911 tpctrack->GetDZ(GetX(),GetY(),GetZ(),tpctrack->GetDP()); //I.B.
3912 if (tpctrack->GetD(0)<20 && tpctrack->GetD(1)<20){
3913 // tracks which can reach inner part of ITS
3914 // propagate track to outer its volume - with correction for material
3915 CorrectForTPCtoITSDeadZoneMaterial(tpctrack);
3917 itsmap[itrack] = nitstracks;
3918 fOriginal.AddAt(tpctrack,nitstracks);
3922 // fill temporary arrays
3924 for (Int_t itrack=0;itrack<ntracks;itrack++){
3925 AliESDtrack * esdtrack = event->GetTrack(itrack);
3926 Int_t itsindex = itsmap[itrack];
3927 AliITStrackMI *original = (AliITStrackMI*)fOriginal.At(itsmap[itrack]);
3928 if (!original) continue;
3929 AliITStrackMI *bestConst = 0;
3930 AliITStrackMI *bestLong = 0;
3931 AliITStrackMI *best = 0;
3934 TObjArray * array = (TObjArray*) fTrackHypothesys.At(itsindex);
3935 Int_t hentries = (array==0) ? 0 : array->GetEntriesFast();
3936 // Get best track with vertex constrain
3937 for (Int_t ih=0;ih<hentries;ih++){
3938 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
3939 if (!trackh->GetConstrain()) continue;
3940 if (!bestConst) bestConst = trackh;
3941 if (trackh->GetNumberOfClusters()>5.0){
3942 bestConst = trackh; // full track - with minimal chi2
3945 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()) continue;
3949 // Get best long track without vertex constrain and best track without vertex constrain
3950 for (Int_t ih=0;ih<hentries;ih++){
3951 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
3952 if (trackh->GetConstrain()) continue;
3953 if (!best) best = trackh;
3954 if (!bestLong) bestLong = trackh;
3955 if (trackh->GetNumberOfClusters()>5.0){
3956 bestLong = trackh; // full track - with minimal chi2
3959 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()) continue;
3964 bestLong = original;
3966 //I.B. trackat0 = *bestLong;
3967 new (&trackat0) AliITStrackMI(*bestLong);
3968 Double_t xx,yy,zz,alpha;
3969 bestLong->GetGlobalXYZat(bestLong->GetX(),xx,yy,zz);
3970 alpha = TMath::ATan2(yy,xx);
3971 trackat0.Propagate(alpha,0);
3972 // calculate normalized distances to the vertex
3974 Float_t ptfac = (1.+100.*TMath::Abs(trackat0.GetC()));
3975 if ( bestLong->GetNumberOfClusters()>3 ){
3976 dist[itsindex] = trackat0.GetY();
3977 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
3978 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
3979 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
3980 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
3982 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<6) normdist[itsindex]*=2.;
3983 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<5) normdist[itsindex]*=2.;
3984 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<4) normdist[itsindex]*=2.;
3986 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<6) normdist[itsindex]*=1.5;
3987 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<5) normdist[itsindex]*=1.5;
3991 if (bestConst&&bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5){
3992 dist[itsindex] = bestConst->GetD(0);
3993 norm[itsindex] = bestConst->GetDnorm(0);
3994 normdist0[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
3995 normdist1[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
3996 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
3998 dist[itsindex] = trackat0.GetY();
3999 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
4000 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
4001 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
4002 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
4003 if (TMath::Abs(trackat0.GetTgl())>1.05){
4004 if (normdist[itsindex]<3) forbidden[itsindex]=kTRUE;
4005 if (normdist[itsindex]>3) {
4006 minr[itsindex] = TMath::Max(Float_t(40.),minr[itsindex]);
4012 //-----------------------------------------------------------
4013 //Forbid primary track candidates -
4015 //treetr->SetAlias("forbidden0","Tr0.fN<4&&Tr1.fN+Tr1.fNDeadZone>4.5");
4016 //treetr->SetAlias("forbidden1","ND<3&&Tr1.fN+Tr1.fNDeadZone>5.5");
4017 //treetr->SetAlias("forbidden2","ND<2&&Tr1.fClIndex[0]>0&&Tr1.fClIndex[0]>0");
4018 //treetr->SetAlias("forbidden3","ND<1&&Tr1.fClIndex[0]>0");
4019 //treetr->SetAlias("forbidden4","ND<4&&Tr1.fNormChi2[0]<2");
4020 //treetr->SetAlias("forbidden5","ND<5&&Tr1.fNormChi2[0]<1");
4021 //-----------------------------------------------------------
4023 if (bestLong->GetNumberOfClusters()<4 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5) forbidden[itsindex]=kTRUE;
4024 if (normdist[itsindex]<3 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>5.5) forbidden[itsindex]=kTRUE;
4025 if (normdist[itsindex]<2 && bestConst->GetClIndex(0)>0 && bestConst->GetClIndex(1)>0 ) forbidden[itsindex]=kTRUE;
4026 if (normdist[itsindex]<1 && bestConst->GetClIndex(0)>0) forbidden[itsindex]=kTRUE;
4027 if (normdist[itsindex]<4 && bestConst->GetNormChi2(0)<2) forbidden[itsindex]=kTRUE;
4028 if (normdist[itsindex]<5 && bestConst->GetNormChi2(0)<1) forbidden[itsindex]=kTRUE;
4029 if (bestConst->GetNormChi2(0)<2.5) {
4030 minPointAngle[itsindex]= 0.9999;
4031 maxr[itsindex] = 10;
4035 //forbid daughter kink candidates
4037 if (esdtrack->GetKinkIndex(0)>0) forbidden[itsindex] = kTRUE;
4038 Bool_t isElectron = kTRUE;
4039 Bool_t isProton = kTRUE;
4041 esdtrack->GetESDpid(pid);
4042 for (Int_t i=1;i<5;i++){
4043 if (pid[0]<pid[i]) isElectron= kFALSE;
4044 if (pid[4]<pid[i]) isProton= kFALSE;
4047 forbidden[itsindex]=kFALSE;
4048 normdist[itsindex]*=-1;
4051 if (normdist[itsindex]>2) forbidden[itsindex]=kFALSE;
4052 normdist[itsindex]*=-1;
4056 // Causality cuts in TPC volume
4058 if (esdtrack->GetTPCdensity(0,10) >0.6) maxr[itsindex] = TMath::Min(Float_t(110),maxr[itsindex]);
4059 if (esdtrack->GetTPCdensity(10,30)>0.6) maxr[itsindex] = TMath::Min(Float_t(120),maxr[itsindex]);
4060 if (esdtrack->GetTPCdensity(20,40)>0.6) maxr[itsindex] = TMath::Min(Float_t(130),maxr[itsindex]);
4061 if (esdtrack->GetTPCdensity(30,50)>0.6) maxr[itsindex] = TMath::Min(Float_t(140),maxr[itsindex]);
4063 if (esdtrack->GetTPCdensity(0,60)<0.4&&bestLong->GetNumberOfClusters()<3) minr[itsindex]=100;
4069 "Tr1.="<<((bestConst)? bestConst:dummy)<<
4071 "Tr3.="<<&trackat0<<
4073 "Dist="<<dist[itsindex]<<
4074 "ND0="<<normdist0[itsindex]<<
4075 "ND1="<<normdist1[itsindex]<<
4076 "ND="<<normdist[itsindex]<<
4077 "Pz="<<primvertex[2]<<
4078 "Forbid="<<forbidden[itsindex]<<
4082 trackarray.AddAt(best,itsindex);
4083 trackarrayc.AddAt(bestConst,itsindex);
4084 trackarrayl.AddAt(bestLong,itsindex);
4085 new (&helixes[itsindex]) AliHelix(*best);
4090 // first iterration of V0 finder
4092 for (Int_t iesd0=0;iesd0<ntracks;iesd0++){
4093 Int_t itrack0 = itsmap[iesd0];
4094 if (forbidden[itrack0]) continue;
4095 AliITStrackMI * btrack0 = (AliITStrackMI*)trackarray.At(itrack0);
4096 if (!btrack0) continue;
4097 if (btrack0->GetSign()>0) continue;
4098 AliITStrackMI *trackc0 = (AliITStrackMI*)trackarrayc.At(itrack0);
4100 for (Int_t iesd1=0;iesd1<ntracks;iesd1++){
4101 Int_t itrack1 = itsmap[iesd1];
4102 if (forbidden[itrack1]) continue;
4104 AliITStrackMI * btrack1 = (AliITStrackMI*)trackarray.At(itrack1);
4105 if (!btrack1) continue;
4106 if (btrack1->GetSign()<0) continue;
4107 Bool_t isGold = kFALSE;
4108 if (TMath::Abs(TMath::Abs(btrack0->GetLabel())-TMath::Abs(btrack1->GetLabel()))==1){
4111 AliITStrackMI *trackc1 = (AliITStrackMI*)trackarrayc.At(itrack1);
4112 AliHelix &h1 = helixes[itrack0];
4113 AliHelix &h2 = helixes[itrack1];
4115 // find linear distance
4120 Double_t phase[2][2],radius[2];
4121 Int_t points = h1.GetRPHIintersections(h2, phase, radius);
4122 if (points==0) continue;
4123 Double_t delta[2]={1000000,1000000};
4125 h1.ParabolicDCA(h2,phase[0][0],phase[0][1],radius[0],delta[0]);
4127 if (radius[1]<rmin) rmin = radius[1];
4128 h1.ParabolicDCA(h2,phase[1][0],phase[1][1],radius[1],delta[1]);
4130 rmin = TMath::Sqrt(rmin);
4131 Double_t distance = 0;
4132 Double_t radiusC = 0;
4134 if (points==1 || delta[0]<delta[1]){
4135 distance = TMath::Sqrt(delta[0]);
4136 radiusC = TMath::Sqrt(radius[0]);
4138 distance = TMath::Sqrt(delta[1]);
4139 radiusC = TMath::Sqrt(radius[1]);
4142 if (radiusC<TMath::Max(minr[itrack0],minr[itrack1])) continue;
4143 if (radiusC>TMath::Min(maxr[itrack0],maxr[itrack1])) continue;
4144 Float_t maxDist = TMath::Min(kMaxDist,Float_t(kMaxDist0+radiusC*kMaxDist1));
4145 if (distance>maxDist) continue;
4146 Float_t pointAngle = h1.GetPointAngle(h2,phase[iphase],primvertex);
4147 if (pointAngle<TMath::Max(minPointAngle[itrack0],minPointAngle[itrack1])) continue;
4150 // Double_t distance = TestV0(h1,h2,pvertex,rmin);
4152 // if (distance>maxDist) continue;
4153 // if (pvertex->GetRr()<kMinR) continue;
4154 // if (pvertex->GetRr()>kMaxR) continue;
4155 AliITStrackMI * track0=btrack0;
4156 AliITStrackMI * track1=btrack1;
4157 // if (pvertex->GetRr()<3.5){
4159 //use longest tracks inside the pipe
4160 track0 = (AliITStrackMI*)trackarrayl.At(itrack0);
4161 track1 = (AliITStrackMI*)trackarrayl.At(itrack1);
4165 pvertex->SetParamN(*track0);
4166 pvertex->SetParamP(*track1);
4167 pvertex->Update(primvertex);
4168 pvertex->SetClusters(track0->ClIndex(),track1->ClIndex()); // register clusters
4170 if (pvertex->GetRr()<kMinR) continue;
4171 if (pvertex->GetRr()>kMaxR) continue;
4172 if (pvertex->GetV0CosineOfPointingAngle()<kMinPointAngle) continue;
4173 //Bo: if (pvertex->GetDist2()>maxDist) continue;
4174 if (pvertex->GetDcaV0Daughters()>maxDist) continue;
4175 //Bo: pvertex->SetLab(0,track0->GetLabel());
4176 //Bo: pvertex->SetLab(1,track1->GetLabel());
4177 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
4178 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
4180 AliITStrackMI * htrackc0 = trackc0 ? trackc0:dummy;
4181 AliITStrackMI * htrackc1 = trackc1 ? trackc1:dummy;
4185 TObjArray * array0b = (TObjArray*)fBestHypothesys.At(itrack0);
4186 if (!array0b&&pvertex->GetRr()<40 && TMath::Abs(track0->GetTgl())<1.1)
4187 FollowProlongationTree((AliITStrackMI*)fOriginal.At(itrack0),itrack0, kFALSE);
4188 TObjArray * array1b = (TObjArray*)fBestHypothesys.At(itrack1);
4189 if (!array1b&&pvertex->GetRr()<40 && TMath::Abs(track1->GetTgl())<1.1)
4190 FollowProlongationTree((AliITStrackMI*)fOriginal.At(itrack1),itrack1, kFALSE);
4192 AliITStrackMI * track0b = (AliITStrackMI*)fOriginal.At(itrack0);
4193 AliITStrackMI * track1b = (AliITStrackMI*)fOriginal.At(itrack1);
4194 AliITStrackMI * track0l = (AliITStrackMI*)fOriginal.At(itrack0);
4195 AliITStrackMI * track1l = (AliITStrackMI*)fOriginal.At(itrack1);
4197 Float_t minchi2before0=16;
4198 Float_t minchi2before1=16;
4199 Float_t minchi2after0 =16;
4200 Float_t minchi2after1 =16;
4201 Double_t xrp[3]; pvertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
4202 Int_t maxLayer = GetNearestLayer(xrp); //I.B.
4204 if (array0b) for (Int_t i=0;i<5;i++){
4205 // best track after vertex
4206 AliITStrackMI * btrack = (AliITStrackMI*)array0b->At(i);
4207 if (!btrack) continue;
4208 if (btrack->GetNumberOfClusters()>track0l->GetNumberOfClusters()) track0l = btrack;
4209 // if (btrack->fX<pvertex->GetRr()-2.-0.5/(0.1+pvertex->GetAnglep()[2])) {
4210 if (btrack->GetX()<pvertex->GetRr()-2.) {
4211 if ( (maxLayer>i+2|| (i==0)) && btrack->GetNumberOfClusters()==(6-i)&&i<3){
4214 if (maxLayer<3){ // take prim vertex as additional measurement
4215 if (normdist[itrack0]>0 && htrackc0){
4216 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack0]*normdist[itrack0],16.);
4218 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack0]*normdist[itrack0]+3.),16.);
4222 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
4224 if (!btrack->GetClIndex(ilayer)){
4228 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
4229 for (Int_t itrack=0;itrack<4;itrack++){
4230 if (fgLayers[ilayer].GetClusterTracks(itrack,c)>=0 && fgLayers[ilayer].GetClusterTracks(itrack,c)!=itrack0){
4231 sumchi2+=18.; //shared cluster
4235 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
4236 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
4240 if (sumchi2<minchi2before0) minchi2before0=sumchi2;
4242 continue; //safety space - Geo manager will give exact layer
4245 minchi2after0 = btrack->GetNormChi2(i);
4248 if (array1b) for (Int_t i=0;i<5;i++){
4249 // best track after vertex
4250 AliITStrackMI * btrack = (AliITStrackMI*)array1b->At(i);
4251 if (!btrack) continue;
4252 if (btrack->GetNumberOfClusters()>track1l->GetNumberOfClusters()) track1l = btrack;
4253 // if (btrack->fX<pvertex->GetRr()-2-0.5/(0.1+pvertex->GetAnglep()[2])){
4254 if (btrack->GetX()<pvertex->GetRr()-2){
4255 if ((maxLayer>i+2 || (i==0))&&btrack->GetNumberOfClusters()==(6-i)&&(i<3)){
4258 if (maxLayer<3){ // take prim vertex as additional measurement
4259 if (normdist[itrack1]>0 && htrackc1){
4260 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack1]*normdist[itrack1],16.);
4262 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack1]*normdist[itrack1]+3.),16.);
4266 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
4268 if (!btrack->GetClIndex(ilayer)){
4272 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
4273 for (Int_t itrack=0;itrack<4;itrack++){
4274 if (fgLayers[ilayer].GetClusterTracks(itrack,c)>=0 && fgLayers[ilayer].GetClusterTracks(itrack,c)!=itrack1){
4275 sumchi2+=18.; //shared cluster
4279 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
4280 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
4284 if (sumchi2<minchi2before1) minchi2before1=sumchi2;
4286 continue; //safety space - Geo manager will give exact layer
4289 minchi2after1 = btrack->GetNormChi2(i);
4293 // position resolution - used for DCA cut
4294 Float_t sigmad = track0b->GetSigmaY2()+track0b->GetSigmaZ2()+track1b->GetSigmaY2()+track1b->GetSigmaZ2()+
4295 (track0b->GetX()-pvertex->GetRr())*(track0b->GetX()-pvertex->GetRr())*(track0b->GetSigmaSnp2()+track0b->GetSigmaTgl2())+
4296 (track1b->GetX()-pvertex->GetRr())*(track1b->GetX()-pvertex->GetRr())*(track1b->GetSigmaSnp2()+track1b->GetSigmaTgl2());
4297 sigmad =TMath::Sqrt(sigmad)+0.04;
4298 if (pvertex->GetRr()>50){
4299 Double_t cov0[15],cov1[15];
4300 track0b->GetESDtrack()->GetInnerExternalCovariance(cov0);
4301 track1b->GetESDtrack()->GetInnerExternalCovariance(cov1);
4302 sigmad = cov0[0]+cov0[2]+cov1[0]+cov1[2]+
4303 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov0[5]+cov0[9])+
4304 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov1[5]+cov1[9]);
4305 sigmad =TMath::Sqrt(sigmad)+0.05;
4309 vertex2.SetParamN(*track0b);
4310 vertex2.SetParamP(*track1b);
4311 vertex2.Update(primvertex);
4312 //Bo: if (vertex2.GetDist2()<=pvertex->GetDist2()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
4313 if (vertex2.GetDcaV0Daughters()<=pvertex->GetDcaV0Daughters()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
4314 pvertex->SetParamN(*track0b);
4315 pvertex->SetParamP(*track1b);
4316 pvertex->Update(primvertex);
4317 pvertex->SetClusters(track0b->ClIndex(),track1b->ClIndex()); // register clusters
4318 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
4319 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
4321 pvertex->SetDistSigma(sigmad);
4322 //Bo: pvertex->SetDistNorm(pvertex->GetDist2()/sigmad);
4323 pvertex->SetNormDCAPrim(normdist[itrack0],normdist[itrack1]);
4325 // define likelihhod and causalities
4327 Float_t pa0=1, pa1=1, pb0=0.26, pb1=0.26;
4329 Float_t fnorm0 = normdist[itrack0];
4330 if (fnorm0<0) fnorm0*=-3;
4331 Float_t fnorm1 = normdist[itrack1];
4332 if (fnorm1<0) fnorm1*=-3;
4333 if (pvertex->GetAnglep()[2]>0.1 || (pvertex->GetRr()<10.5)&& pvertex->GetAnglep()[2]>0.05 || pvertex->GetRr()<3){
4334 pb0 = TMath::Exp(-TMath::Min(fnorm0,Float_t(16.))/12.);
4335 pb1 = TMath::Exp(-TMath::Min(fnorm1,Float_t(16.))/12.);
4337 pvertex->SetChi2Before(normdist[itrack0]);
4338 pvertex->SetChi2After(normdist[itrack1]);
4339 pvertex->SetNAfter(0);
4340 pvertex->SetNBefore(0);
4342 pvertex->SetChi2Before(minchi2before0);
4343 pvertex->SetChi2After(minchi2before1);
4344 if (pvertex->GetAnglep()[2]>0.1 || ( pvertex->GetRr()<10.5 && pvertex->GetAnglep()[2]>0.05) || pvertex->GetRr()<3){
4345 pb0 = TMath::Exp(-TMath::Min(minchi2before0,Float_t(16))/12.);
4346 pb1 = TMath::Exp(-TMath::Min(minchi2before1,Float_t(16))/12.);
4348 pvertex->SetNAfter(maxLayer);
4349 pvertex->SetNBefore(maxLayer);
4351 if (pvertex->GetRr()<90){
4352 pa0 *= TMath::Min(track0->GetESDtrack()->GetTPCdensity(0,60),Float_t(1.));
4353 pa1 *= TMath::Min(track1->GetESDtrack()->GetTPCdensity(0,60),Float_t(1.));
4355 if (pvertex->GetRr()<20){
4356 pa0 *= (0.2+TMath::Exp(-TMath::Min(minchi2after0,Float_t(16))/8.))/1.2;
4357 pa1 *= (0.2+TMath::Exp(-TMath::Min(minchi2after1,Float_t(16))/8.))/1.2;
4360 pvertex->SetCausality(pb0,pb1,pa0,pa1);
4362 // Likelihood calculations - apply cuts
4364 Bool_t v0OK = kTRUE;
4365 Float_t p12 = pvertex->GetParamP()->GetParameter()[4]*pvertex->GetParamP()->GetParameter()[4];
4366 p12 += pvertex->GetParamN()->GetParameter()[4]*pvertex->GetParamN()->GetParameter()[4];
4367 p12 = TMath::Sqrt(p12); // "mean" momenta
4368 Float_t sigmap0 = 0.0001+0.001/(0.1+pvertex->GetRr());
4369 Float_t sigmap = 0.5*sigmap0*(0.6+0.4*p12); // "resolution: of point angle - as a function of radius and momenta
4371 Float_t causalityA = (1.0-pvertex->GetCausalityP()[0])*(1.0-pvertex->GetCausalityP()[1]);
4372 Float_t causalityB = TMath::Sqrt(TMath::Min(pvertex->GetCausalityP()[2],Float_t(0.7))*
4373 TMath::Min(pvertex->GetCausalityP()[3],Float_t(0.7)));
4375 //Bo: Float_t likelihood0 = (TMath::Exp(-pvertex->GetDistNorm())+0.1) *(pvertex->GetDist2()<0.5)*(pvertex->GetDistNorm()<5);
4376 Float_t lDistNorm = pvertex->GetDcaV0Daughters()/pvertex->GetDistSigma();
4377 Float_t likelihood0 = (TMath::Exp(-lDistNorm)+0.1) *(pvertex->GetDcaV0Daughters()<0.5)*(lDistNorm<5);
4379 Float_t likelihood1 = TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/sigmap)+
4380 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(4.*sigmap))+
4381 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(8.*sigmap))+
4382 0.1*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/0.01);
4384 if (causalityA<kCausality0Cut) v0OK = kFALSE;
4385 if (TMath::Sqrt(likelihood0*likelihood1)<kLikelihood01Cut) v0OK = kFALSE;
4386 if (likelihood1<kLikelihood1Cut) v0OK = kFALSE;
4387 if (TMath::Power(likelihood0*likelihood1*causalityB,0.33)<kCombinedCut) v0OK = kFALSE;
4392 Bool_t gold = TMath::Abs(TMath::Abs(track0->GetLabel())-TMath::Abs(track1->GetLabel()))==1;
4394 "Tr0.="<<track0<< //best without constrain
4395 "Tr1.="<<track1<< //best without constrain
4396 "Tr0B.="<<track0b<< //best without constrain after vertex
4397 "Tr1B.="<<track1b<< //best without constrain after vertex
4398 "Tr0C.="<<htrackc0<< //best with constrain if exist
4399 "Tr1C.="<<htrackc1<< //best with constrain if exist
4400 "Tr0L.="<<track0l<< //longest best
4401 "Tr1L.="<<track1l<< //longest best
4402 "Esd0.="<<track0->GetESDtrack()<< // esd track0 params
4403 "Esd1.="<<track1->GetESDtrack()<< // esd track1 params
4404 "V0.="<<pvertex<< //vertex properties
4405 "V0b.="<<&vertex2<< //vertex properties at "best" track
4406 "ND0="<<normdist[itrack0]<< //normalize distance for track0
4407 "ND1="<<normdist[itrack1]<< //normalize distance for track1
4409 // "RejectBase="<<rejectBase<< //rejection in First itteration
4415 //if (rejectBase) continue;
4417 pvertex->SetStatus(0);
4418 // if (rejectBase) {
4419 // pvertex->SetStatus(-100);
4421 if (pvertex->GetV0CosineOfPointingAngle()>kMinPointAngle2) {
4422 //Bo: pvertex->SetESDindexes(track0->GetESDtrack()->GetID(),track1->GetESDtrack()->GetID());
4423 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());//Bo: consistency 0 for neg
4424 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());//Bo: consistency 1 for pos
4426 // AliV0vertex vertexjuri(*track0,*track1);
4427 // vertexjuri.SetESDindexes(track0->fESDtrack->GetID(),track1->fESDtrack->GetID());
4428 // event->AddV0(&vertexjuri);
4429 pvertex->SetStatus(100);
4431 pvertex->SetOnFlyStatus(kTRUE);
4432 pvertex->ChangeMassHypothesis(kK0Short);
4433 event->AddV0(pvertex);
4439 // delete temporary arrays
4442 delete[] minPointAngle;
4454 //------------------------------------------------------------------------
4455 void AliITStrackerMI::RefitV02(AliESDEvent *event)
4458 //try to refit V0s in the third path of the reconstruction
4460 TTreeSRedirector &cstream = *fDebugStreamer;
4462 Int_t nv0s = event->GetNumberOfV0s();
4463 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
4465 for (Int_t iv0 = 0; iv0<nv0s;iv0++){
4466 AliV0 * v0mi = (AliV0*)event->GetV0(iv0);
4467 if (!v0mi) continue;
4468 Int_t itrack0 = v0mi->GetIndex(0);
4469 Int_t itrack1 = v0mi->GetIndex(1);
4470 AliESDtrack *esd0 = event->GetTrack(itrack0);
4471 AliESDtrack *esd1 = event->GetTrack(itrack1);
4472 if (!esd0||!esd1) continue;
4473 AliITStrackMI tpc0(*esd0);
4474 AliITStrackMI tpc1(*esd1);
4475 Double_t x,y,z; v0mi->GetXYZ(x,y,z); //I.B.
4476 Double_t alpha =TMath::ATan2(y,x); //I.B.
4477 if (v0mi->GetRr()>85){
4478 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
4479 v0temp.SetParamN(tpc0);
4480 v0temp.SetParamP(tpc1);
4481 v0temp.Update(primvertex);
4482 if (kFALSE) cstream<<"Refit"<<
4484 "V0refit.="<<&v0temp<<
4488 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4489 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4490 v0mi->SetParamN(tpc0);
4491 v0mi->SetParamP(tpc1);
4492 v0mi->Update(primvertex);
4497 if (v0mi->GetRr()>35){
4498 CorrectForTPCtoITSDeadZoneMaterial(&tpc0);
4499 CorrectForTPCtoITSDeadZoneMaterial(&tpc1);
4500 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
4501 v0temp.SetParamN(tpc0);
4502 v0temp.SetParamP(tpc1);
4503 v0temp.Update(primvertex);
4504 if (kFALSE) cstream<<"Refit"<<
4506 "V0refit.="<<&v0temp<<
4510 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4511 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4512 v0mi->SetParamN(tpc0);
4513 v0mi->SetParamP(tpc1);
4514 v0mi->Update(primvertex);
4519 CorrectForTPCtoITSDeadZoneMaterial(&tpc0);
4520 CorrectForTPCtoITSDeadZoneMaterial(&tpc1);
4521 // if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
4522 if (RefitAt(v0mi->GetRr(),&tpc0, v0mi->GetClusters(0)) && RefitAt(v0mi->GetRr(),&tpc1, v0mi->GetClusters(1))){
4523 v0temp.SetParamN(tpc0);
4524 v0temp.SetParamP(tpc1);
4525 v0temp.Update(primvertex);
4526 if (kFALSE) cstream<<"Refit"<<
4528 "V0refit.="<<&v0temp<<
4532 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4533 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4534 v0mi->SetParamN(tpc0);
4535 v0mi->SetParamP(tpc1);
4536 v0mi->Update(primvertex);
4541 //------------------------------------------------------------------------