1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
16 //-----------------------------------------------------------------//
18 // AliTOFtracker Class //
19 // Task: Perform association of the ESD tracks to TOF Clusters //
20 // and Update ESD track with associated TOF Cluster parameters //
22 //-----------------------------------------------------------------//
26 #include "TClonesArray.h"
28 #include "TTreeStream.h"
30 #include "AliESDEvent.h"
31 #include "AliESDtrack.h"
32 #include "AliESDpid.h"
34 #include "AliTOFRecoParam.h"
35 #include "AliTOFReconstructor.h"
36 #include "AliTOFcluster.h"
37 #include "AliTOFGeometry.h"
38 #include "AliTOFtrackerMI.h"
39 #include "AliTOFtrack.h"
41 #include "AliMathBase.h"
45 extern TGeoManager *gGeoManager;
47 ClassImp(AliTOFtrackerMI)
49 //_____________________________________________________________________________
50 AliTOFtrackerMI::AliTOFtrackerMI():
66 fTracks(new TClonesArray("AliTOFtrack")),
67 fSeeds(new TClonesArray("AliESDtrack")),
70 //AliTOFtrackerMI main Ctor
72 fDy=AliTOFGeometry::XPad();
73 fDz=AliTOFGeometry::ZPad();
74 fDebugStreamer = new TTreeSRedirector("TOFdebug.root");
77 //_____________________________________________________________________________
78 AliTOFtrackerMI::~AliTOFtrackerMI(){
83 //fDebugStreamer->Close();
84 delete fDebugStreamer;
99 //_____________________________________________________________________________
100 void AliTOFtrackerMI::GetPidSettings(AliESDpid *esdPID) {
102 // Sets TOF resolution from RecoParams
105 esdPID->GetTOFResponse().SetTimeResolution(fkRecoParam->GetTimeResolution());
107 AliWarning("fkRecoParam not yet set; cannot set PID settings");
110 //_____________________________________________________________________________
111 Int_t AliTOFtrackerMI::PropagateBack(AliESDEvent * const event) {
113 // Gets seeds from ESD event and Match with TOF Clusters
116 // initialize RecoParam for current event
117 AliDebug(1,"Initializing params for TOF");
119 fkRecoParam = AliTOFReconstructor::GetRecoParam(); // instantiate reco param from STEER...
121 if (fkRecoParam == 0x0) {
122 AliFatal("No Reco Param found for TOF!!!");
124 //fkRecoParam->Dump();
125 //if(fkRecoParam->GetApplyPbPbCuts())fkRecoParam=fkRecoParam->GetPbPbparam();
126 //fkRecoParam->PrintParameters();
128 //Initialise some counters
137 Int_t ntrk=event->GetNumberOfTracks();
139 TClonesArray &aESDTrack = *fSeeds;
142 //Load ESD tracks into a local Array of ESD Seeds
144 for (Int_t i=0; i<fNseeds; i++) {
145 AliESDtrack *t=event->GetTrack(i);
146 new(aESDTrack[i]) AliESDtrack(*t);
149 //Prepare ESD tracks candidates for TOF Matching
152 //First Step with Strict Matching Criterion
153 //MatchTracks(kFALSE);
155 //Second Step with Looser Matching Criterion
156 //MatchTracks(kTRUE);
157 MatchTracksMI(kFALSE); // assign track to clusters
158 MatchTracksMI(kTRUE); // assign clusters to esd
160 AliInfo(Form("Number of matched tracks = %d (good = %d, bad = %d)",fnmatch,fngoodmatch,fnbadmatch));
162 //Update the matched ESD tracks
164 for (Int_t i=0; i<ntrk; i++) {
165 AliESDtrack *t=event->GetTrack(i);
166 AliESDtrack *seed =(AliESDtrack*)fSeeds->UncheckedAt(i);
168 if ( (seed->GetStatus()&AliESDtrack::kTOFin)!=0 ) {
169 t->SetStatus(AliESDtrack::kTOFin);
170 //if(seed->GetTOFsignal()>0){
171 if ( (seed->GetStatus()&AliESDtrack::kTOFout)!=0 ) {
172 t->SetStatus(AliESDtrack::kTOFout);
173 t->SetTOFsignal(seed->GetTOFsignal());
174 t->SetTOFcluster(seed->GetTOFcluster());
175 Int_t tlab[3]; seed->GetTOFLabel(tlab);
176 t->SetTOFLabel(tlab);
179 // by calling the AliESDtrack::UpdateTrackParams,
180 // the current track parameters are changed
181 // and it could cause refit problems.
182 // We need to update only the following track parameters:
183 // the track length and expected times.
184 // Removed AliESDtrack::UpdateTrackParams call
185 // Called AliESDtrack::SetIntegratedTimes(...) and
186 // AliESDtrack::SetIntegratedLength() routines.
188 AliTOFtrack *track = new AliTOFtrack(*seed);
189 t->UpdateTrackParams(track,AliESDtrack::kTOFout);
193 Double_t times[10]; seed->GetIntegratedTimes(times);
194 t->SetIntegratedTimes(times);
195 t->SetIntegratedLength(seed->GetIntegratedLength());
196 t->SetTOFsignalToT(seed->GetTOFsignalToT());
197 t->SetTOFCalChannel(seed->GetTOFCalChannel());
198 t->SetTOFDeltaBC(seed->GetTOFDeltaBC());
199 t->SetTOFL0L1(seed->GetTOFL0L1());
201 // Make attention, please:
202 // AliESDtrack::fTOFInfo array does not be stored in the AliESDs.root file
203 // it is there only for a check during the reconstruction step.
205 seed->GetTOFInfo(info);
219 //_________________________________________________________________________
220 void AliTOFtrackerMI::CollectESD() {
221 //prepare the set of ESD tracks to be matched to clusters in TOF
223 TClonesArray &aTOFTrack = *fTracks;
226 for (Int_t i=0; i<fNseeds; i++) {
228 AliESDtrack *t =(AliESDtrack*)fSeeds->UncheckedAt(i);
229 if ((t->GetStatus()&AliESDtrack::kTPCout)==0)continue;
231 AliTOFtrack *track = new AliTOFtrack(*t); // New
232 Float_t x = (Float_t)track->GetX(); //New
234 // TRD good tracks, already propagated at 371 cm
235 if ( ( (t->GetStatus()&AliESDtrack::kTRDout)!=0 ) &&
236 ( x >= AliTOFGeometry::Rmin() ) ) {
237 if ( track->PropagateToInnerTOF() ) {
238 track->SetSeedIndex(i);
239 t->UpdateTrackParams(track,AliESDtrack::kTOFin);
240 new(aTOFTrack[fNseedsTOF]) AliTOFtrack(*track);
247 // Propagate the rest of TPCbp
249 if ( track->PropagateToInnerTOF() ) { // temporary solution
250 track->SetSeedIndex(i);
251 t->UpdateTrackParams(track,AliESDtrack::kTOFin);
252 new(aTOFTrack[fNseedsTOF]) AliTOFtrack(*track);
261 printf("TRD\tOn\t%d\tOff\t%d\n",c0,c1);
263 // Sort according uncertainties on track position
268 //_________________________________________________________________________
269 void AliTOFtrackerMI::MatchTracks( Bool_t /*mLastStep*/) const {
274 //_________________________________________________________________________
275 void AliTOFtrackerMI::MatchTracksMI(Bool_t mLastStep){
277 //Match ESD tracks to clusters in TOF
278 const Float_t kTofOffset = 26; // time offset
279 const Float_t kMinQuality = -6.; // minimal quality
280 const Float_t kMaxQualityD = 1.; // max delta quality if cluster used
281 const Float_t kForbiddenR = 0.1; // minimal PID according TPC
283 static const Double_t kMasses[]={
284 0.000511, 0.105658, 0.139570, 0.493677, 0.938272, 1.875613
287 Int_t nSteps=(Int_t)(fTOFHeigth/0.1);
289 //AliTOFcalib *calib = new AliTOFcalib(); // AdC
291 //PH Arrays (moved outside of the loop)
292 Float_t * trackPos[4];
293 for (Int_t ii=0; ii<4; ii++) trackPos[ii] = new Float_t[nSteps];
294 Int_t * clind = new Int_t[fN];
297 const Int_t kNclusterMax = 1000; // related to fN value
298 AliTOFcluster *clusters[kNclusterMax];
299 Int_t index[kNclusterMax];
300 Float_t quality[kNclusterMax];
301 Float_t dist3D[kNclusterMax][6];
302 Double_t times[kNclusterMax][6];
303 Float_t mintimedist[kNclusterMax];
304 Float_t likelihood[kNclusterMax];
305 Float_t length[kNclusterMax];
309 for (Int_t i=0; i<fNseedsTOF; i++) {
311 AliTOFtrack *track =(AliTOFtrack*)fTracks->UncheckedAt(i);
312 AliESDtrack *t =(AliESDtrack*)fSeeds->UncheckedAt(track->GetSeedIndex());
313 Bool_t hasTime = ( (t->GetStatus()& AliESDtrack::kTIME)>0) ? kTRUE:kFALSE; // did we integrate time
314 Float_t trdquality = t->GetTRDQuality();
318 t->GetTPCpid(tpcpid);
320 for (Int_t ipid=0;ipid<5;ipid++){
321 sumpid+=tpcpid[ipid];
323 for (Int_t ipid=0;ipid<5;ipid++){
324 if (sumpid>0) tpcpid[ipid]/=sumpid;
330 if (trdquality<0) continue; // no chance
332 AliTOFtrack *trackTOFin =new AliTOFtrack(*track);
334 //propagat track to the middle of TOF
336 Float_t xs = 379.2; // should be defined in the TOF geometry
337 Double_t ymax=xs*TMath::Tan(0.5*AliTOFGeometry::GetAlpha());
339 Double_t ysect=trackTOFin->GetYat(xs,skip);
342 ymax=xs*TMath::Tan(0.5*AliTOFGeometry::GetAlpha());
343 ysect=trackTOFin->GetYat(xs,skip);
346 if (!trackTOFin->Rotate(AliTOFGeometry::GetAlpha())) {
349 } else if (ysect <-ymax) {
350 if (!trackTOFin->Rotate(-AliTOFGeometry::GetAlpha())) {
354 if(!trackTOFin->PropagateTo(xs)) {
358 // Determine a window around the track
361 trackTOFin->GetExternalParameters(x,par);
363 trackTOFin->GetExternalCovariance(cov);
365 if (cov[0]<0. || cov[2]<0.) {
366 AliWarning(Form("Very strange track (%d)! At least one of its covariance matrix diagonal elements is negative!",i));
371 Float_t scalefact=3.;
374 ((5*TMath::Sqrt(TMath::Abs(cov[0])) + 3.*fDy + 10.*TMath::Abs(par[2]))/fR);
377 (5*TMath::Sqrt(TMath::Abs(cov[2])) + 3.*fDz + 10.*TMath::Abs(par[3]));
379 Double_t phi=TMath::ATan2(par[0],x) + trackTOFin->GetAlpha();
380 if (phi<-TMath::Pi())phi+=2*TMath::Pi();
381 if (phi>=TMath::Pi())phi-=2*TMath::Pi();
386 // find the clusters in the window of the track
388 for (Int_t k=FindClusterIndex(z-dz); k<fN; k++) {
390 if (nc>=kNclusterMax) {
391 AliWarning("No more matchable clusters can be stored! Please, increase the corresponding vectors size.");
395 AliTOFcluster *c=fClusters[k];
396 if (c->GetZ() > z+dz) break;
397 // if (c->IsUsed()) continue;
399 Double_t dph=TMath::Abs(c->GetPhi()-phi);
400 if (dph>TMath::Pi()) dph-=2.*TMath::Pi();
401 if (TMath::Abs(dph)>dphi) continue;
407 AliDebug(1,Form(" Number of matchable TOF clusters for the track number %d: %d",i,nc));
410 // select close clusters
412 Double_t mom=t->GetP();
413 // Bool_t dump = kTRUE;
414 for (Int_t icl=0; icl<nc; icl++){
415 Float_t distances[5];
417 index[nfound]=clind[icl];
418 AliTOFcluster *cluster = fClusters[clind[icl]];
419 GetLinearDistances(trackTOFin, cluster, distances);
420 dist3D[nfound][0] = distances[4];
421 dist3D[nfound][1] = distances[1];
422 dist3D[nfound][2] = distances[2];
424 if (TMath::Abs(dist3D[nfound][1])>20 || TMath::Abs(dist3D[nfound][2])>20) continue;
426 GetLikelihood(distances[1],distances[2],cov,trackTOFin, dist3D[nfound][3], dist3D[nfound][4]);
429 if (dist3D[nfound][3]*dist3D[nfound][4]<0.00000000000001) continue; // log likelihood
430 if (TMath::Log(dist3D[nfound][3]*dist3D[nfound][4])<-9) continue; // log likelihood
432 clusters[nfound] = cluster;
434 //length and TOF updates
435 trackTOFin->GetIntegratedTimes(times[nfound]);
436 length[nfound] = trackTOFin->GetIntegratedLength();
437 length[nfound]+=distances[4];
438 mintimedist[nfound]=1000;
439 Double_t tof2=AliTOFGeometry::TdcBinWidth()*cluster->GetTDC()+kTofOffset; // in ps
440 // Float_t tgamma = TMath::Sqrt(cluster->GetR()*cluster->GetR()+cluster->GetZ()*cluster->GetZ())/0.03; //time for "primary" gamma
441 //if (trackTOFin->GetPt()<0.7 && TMath::Abs(tgamma-tof2)<350) continue; // gamma conversion candidate - TEMPORARY
442 for(Int_t j=0;j<=5;j++){
443 Double_t mass=kMasses[j];
444 times[nfound][j]+=distances[4]/3e-2*TMath::Sqrt(mom*mom+mass*mass)/mom; // add time distance
445 if ( TMath::Abs(times[nfound][j]-tof2)<mintimedist[nfound] && tpcpid[j]>kForbiddenR){
446 mintimedist[nfound]=TMath::Abs(times[nfound][j]-tof2);
450 Float_t liketime = TMath::Exp(-mintimedist[nfound]/90.)+0.25*TMath::Exp(-mintimedist[nfound]/180.);
451 if (!hasTime) liketime=0.2;
452 likelihood[nfound] = TMath::Log(dist3D[nfound][3]*dist3D[nfound][4]*liketime);
454 if (TMath::Log(dist3D[nfound][3]*dist3D[nfound][4])<-1){
455 if (likelihood[nfound]<-9.) continue;
461 AliDebug(1,Form(" Number of track points for the track number %d: %d",i,nfound));
469 //choose the best cluster
471 //Float_t quality[kNclusterMax];
472 //Int_t index[kNclusterMax];
473 for (Int_t kk=0; kk<kNclusterMax; kk++) quality[kk]=0;
475 AliTOFcluster * cgold=0;
477 for (Int_t icl=0;icl<nfound;icl++){
478 quality[icl] = dist3D[icl][3]*dist3D[icl][4];
480 TMath::Sort(nfound,quality,index,kTRUE);
482 cgold = clusters[igold];
483 if (nfound>1 &&likelihood[index[1]]>likelihood[index[0]]){
484 if ( quality[index[0]]<quality[index[1]]+0.5){
486 cgold = clusters[igold];
491 Float_t qualityGold = TMath::Log(0.0000001+(quality[igold]*(0.1+TMath::Exp(-mintimedist[igold]/80.))*(0.2+trdquality)));
493 if (cgold->GetQuality()<qualityGold) cgold->SetQuality(qualityGold);
498 //signed better cluster
499 if (cgold->GetQuality()>qualityGold+kMaxQualityD) continue;
500 if (2.*qualityGold-cgold->GetQuality()<kMinQuality) continue;
505 for (Int_t icl=0;icl<nfound;icl++){
507 (clusters[index[icl]]->GetLabel(0)==TMath::Abs(trackTOFin->GetLabel()))
509 (clusters[index[icl]]->GetLabel(1)==TMath::Abs(trackTOFin->GetLabel()))
511 (clusters[index[icl]]->GetLabel(2)==TMath::Abs(trackTOFin->GetLabel()))
518 if (inonfake==0) fngoodmatch++;
524 tlab[0]=cgold->GetLabel(0);
525 tlab[1]=cgold->GetLabel(1);
526 tlab[2]=cgold->GetLabel(2);
527 // Double_t tof2=25.*cgold->GetTDC()-350; // in ps
528 Double_t tof2=AliTOFGeometry::TdcBinWidth()*cgold->GetTDC()+kTofOffset; // in ps
529 Float_t tgamma = TMath::Sqrt(cgold->GetR()*cgold->GetR()+cgold->GetZ()*cgold->GetZ())/0.03;
530 Float_t info[10]={dist3D[igold][0],
539 cgold->GetQuality()};
540 // GetLinearDistances(trackTOFin,cgold,&info[6]);
543 // info[7] = mintimedist[index[inonfake]];
546 // Store quantities to be used for TOF Calibration
547 Float_t tToT=cgold->GetToT(); // in ps
548 t->SetTOFsignalToT(tToT);
550 ind[0]=cgold->GetDetInd(0);
551 ind[1]=cgold->GetDetInd(1);
552 ind[2]=cgold->GetDetInd(2);
553 ind[3]=cgold->GetDetInd(3);
554 ind[4]=cgold->GetDetInd(4);
555 Int_t calindex = AliTOFGeometry::GetIndex(ind);
556 t->SetTOFCalChannel(calindex);
559 t->SetTOFsignal(tof2);
560 t->SetTOFcluster(cgold->GetIndex());
561 t->SetTOFDeltaBC(cgold->GetDeltaBC());
562 t->SetTOFL0L1(cgold->GetL0L1Latency());
564 AliDebug(2, Form("%7i %7i %10i %10i %10i %10i %7i",
567 TMath::Abs(trackTOFin->GetLabel()),
568 tlab[0], tlab[1], tlab[2],
571 AliTOFtrack *trackTOFout = new AliTOFtrack(*t);
572 trackTOFout->PropagateTo(379.);
574 // Fill the track residual histograms.
575 FillResiduals(trackTOFout,cgold,kFALSE);
577 t->UpdateTrackParams(trackTOFout,AliESDtrack::kTOFout);
578 t->SetIntegratedLength(length[igold]);
579 t->SetIntegratedTimes(times[igold]);
580 t->SetTOFLabel(tlab);
589 for (Int_t ii=0; ii<4; ii++) delete [] trackPos[ii];
591 //delete calib; // AdC
593 //_________________________________________________________________________
595 Int_t AliTOFtrackerMI::LoadClusters(TTree *cTree) {
596 //--------------------------------------------------------------------
597 //This function loads the TOF clusters
598 //--------------------------------------------------------------------
600 TBranch *branch=cTree->GetBranch("TOF");
602 AliError("can't get the branch with the TOF clusters !");
606 static TClonesArray dummy("AliTOFcluster",10000);
608 TClonesArray *clusters=&dummy;
609 branch->SetAddress(&clusters);
612 Int_t nc=clusters->GetEntriesFast();
613 AliInfo(Form("Number of clusters: %d",nc));
615 for (Int_t i=0; i<nc; i++) {
616 AliTOFcluster *c=(AliTOFcluster*)clusters->UncheckedAt(i);
618 //PH fClusters[i]=new AliTOFcluster(*c); fN++;
619 fClusters[i]=c; fN++;
621 //AliInfo(Form("%4i %4i %f %f %f %f %f %2i %1i %2i %1i %2i",i, fClusters[i]->GetIndex(),fClusters[i]->GetZ(),fClusters[i]->GetR(),fClusters[i]->GetPhi(), fClusters[i]->GetTDC(),fClusters[i]->GetADC(),fClusters[i]->GetDetInd(0),fClusters[i]->GetDetInd(1),fClusters[i]->GetDetInd(2),fClusters[i]->GetDetInd(3),fClusters[i]->GetDetInd(4)));
622 //AliInfo(Form("%i %f",i, fClusters[i]->GetZ()));
625 //AliInfo(Form("Number of clusters: %d",fN));
629 //_________________________________________________________________________
630 void AliTOFtrackerMI::UnloadClusters() {
631 //--------------------------------------------------------------------
632 //This function unloads TOF clusters
633 //--------------------------------------------------------------------
634 for (Int_t i=0; i<fN; i++) {
635 //PH delete fClusters[i];
644 //_________________________________________________________________________
645 Int_t AliTOFtrackerMI::InsertCluster(AliTOFcluster *c) {
646 //--------------------------------------------------------------------
647 //This function adds a cluster to the array of clusters sorted in Z
648 //--------------------------------------------------------------------
649 if (fN==kMaxCluster) {
650 AliError("Too many clusters !");
654 if (fN==0) {fClusters[fN++]=c; return 0;}
655 Int_t i=FindClusterIndex(c->GetZ());
656 memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliTOFcluster*));
657 fClusters[i]=c; fN++;
662 //_________________________________________________________________________
663 Int_t AliTOFtrackerMI::FindClusterIndex(Double_t z) const {
664 //--------------------------------------------------------------------
665 // This function returns the index of the nearest cluster
666 //--------------------------------------------------------------------
668 if (z <= fClusters[0]->GetZ()) return 0;
669 if (z > fClusters[fN-1]->GetZ()) return fN;
670 Int_t b=0, e=fN-1, m=(b+e)/2;
671 for (; b<e; m=(b+e)/2) {
672 if (z > fClusters[m]->GetZ()) b=m+1;
678 //_________________________________________________________________________
679 Float_t AliTOFtrackerMI::GetLinearDistances(AliTOFtrack * track, AliTOFcluster *cluster, Float_t distances[5])
682 // calclates distance between cluster and track
683 // use linear aproximation
685 //const Float_t kRaddeg = 180/3.14159265358979312;
686 const Float_t kRaddeg = TMath::RadToDeg();
688 // Float_t tiltangle = fGeom->GetAngles(cluster->fdetIndex[1],cluster->fdetIndex[2])/kRaddeg; //tiltangle
690 cind[0]= cluster->GetDetInd(0);
691 cind[1]= cluster->GetDetInd(1);
692 cind[2]= cluster->GetDetInd(2);
693 cind[3]= cluster->GetDetInd(3);
694 cind[4]= cluster->GetDetInd(4);
695 Float_t tiltangle = AliTOFGeometry::GetAngles(cluster->GetDetInd(1),cluster->GetDetInd(2))/kRaddeg; //tiltangle
697 Float_t cpos[3]; //cluster position
698 Float_t cpos0[3]; //cluster position
699 // fGeom->GetPos(cluster->fdetIndex,cpos);
700 //fGeom->GetPos(cluster->fdetIndex,cpos0);
702 fGeom->GetPos(cind,cpos);
703 fGeom->GetPos(cind,cpos0);
705 Float_t phi = TMath::ATan2(cpos[1],cpos[0]);
706 if(phi<0) phi=2.*TMath::Pi()+phi;
707 // Get the local angle in the sector philoc
708 Float_t phiangle = (Int_t (phi*kRaddeg/20.) + 0.5)*20./kRaddeg;
713 track->GetPxPyPz(dir);
714 dir[0]/=track->GetP();
715 dir[1]/=track->GetP();
716 dir[2]/=track->GetP();
720 Float_t sinphi = TMath::Sin(phiangle);
721 Float_t cosphi = TMath::Cos(phiangle);
722 Float_t sinth = TMath::Sin(tiltangle);
723 Float_t costh = TMath::Cos(tiltangle);
726 temp = cpos[0]*cosphi+cpos[1]*sinphi;
727 cpos[1] = -cpos[0]*sinphi+cpos[1]*cosphi;
729 temp = v0[0]*cosphi+v0[1]*sinphi;
730 v0[1] = -v0[0]*sinphi+v0[1]*cosphi;
733 temp = cpos[0]*costh+cpos[2]*sinth;
734 cpos[2] = -cpos[0]*sinth+cpos[2]*costh;
736 temp = v0[0]*costh+v0[2]*sinth;
737 v0[2] = -v0[0]*sinth+v0[2]*costh;
741 //rotate direction vector
743 temp = dir[0]*cosphi+dir[1]*sinphi;
744 dir[1] = -dir[0]*sinphi+dir[1]*cosphi;
747 temp = dir[0]*costh+dir[2]*sinth;
748 dir[2] = -dir[0]*sinth+dir[2]*costh;
752 Float_t k = (cpos[0]-v0[0])/dir[0];
753 v3[0] = v0[0]+k*dir[0];
754 v3[1] = v0[1]+k*dir[1];
755 v3[2] = v0[2]+k*dir[2];
757 distances[0] = v3[0]-cpos[0];
758 distances[1] = v3[1]-cpos[1];
759 distances[2] = v3[2]-cpos[2];
760 distances[3] = TMath::Sqrt( distances[0]*distances[0]+distances[1]*distances[1]+distances[2]*distances[2]); //distance
761 distances[4] = k; //length
764 // Debuging part of the matching
766 if (track->GetLabel()==cluster->GetLabel(0) ||
767 track->GetLabel()==cluster->GetLabel(1) ||
768 track->GetLabel()==cluster->GetLabel(2) ){
769 TTreeSRedirector& cstream = *fDebugStreamer;
770 Float_t tdc = cluster->GetTDC();
777 "Dist0="<<distances[0]<<
778 "Dist1="<<distances[1]<<
779 "Dist2="<<distances[2]<<
786 //_________________________________________________________________________
787 void AliTOFtrackerMI::GetLikelihood(Float_t dy, Float_t dz, const Double_t *cov, AliTOFtrack * /*track*/, Float_t & py, Float_t &pz) const
790 // get likelihood - track covariance taken
791 // 75 % of gauss with expected sigma
792 // 25 % of gauss with extended sigma
794 Double_t kMaxSigmaY = 0.6; // ~ 90% of TRD tracks
795 Double_t kMaxSigmaZ = 1.2; // ~ 90% of TRD tracks
796 Double_t kMeanSigmaY = 0.25; // mean TRD sigma
797 Double_t kMeanSigmaZ = 0.5; // mean TRD sigma
800 Float_t normwidth, normd, p0,p1;
801 Float_t sigmay = TMath::Max(TMath::Sqrt(cov[0]+kMeanSigmaY*kMeanSigmaY),kMaxSigmaY);
802 Float_t sigmaz = TMath::Max(TMath::Sqrt(cov[2]+kMeanSigmaZ*kMeanSigmaZ),kMaxSigmaZ);
807 // py calculation - 75% admixture of original sigma - 25% tails
809 normwidth = fDy/sigmay;
811 p0 = 0.5*(1+AliMathBase::ErfFast(normd-normwidth*0.5));
812 p1 = 0.5*(1+AliMathBase::ErfFast(normd+normwidth*0.5));
815 normwidth = fDy/(3.*sigmay);
816 normd = dy/(3.*sigmay);
817 p0 = 0.5*(1+AliMathBase::ErfFast(normd-normwidth*0.5));
818 p1 = 0.5*(1+AliMathBase::ErfFast(normd+normwidth*0.5));
821 // pz calculation - 75% admixture of original sigma - 25% tails
823 normwidth = fDz/sigmaz;
825 p0 = 0.5*(1+AliMathBase::ErfFast(normd-normwidth*0.5));
826 p1 = 0.5*(1+AliMathBase::ErfFast(normd+normwidth*0.5));
829 normwidth = fDz/(3.*sigmaz);
830 normd = dz/(3.*sigmaz);
831 p0 = 0.5*(1+AliMathBase::ErfFast(normd-normwidth*0.5));
832 p1 = 0.5*(1+AliMathBase::ErfFast(normd+normwidth*0.5));
835 //_________________________________________________________________________
837 void AliTOFtrackerMI::FillClusterArray(TObjArray* arr) const
840 // Returns the TOF cluster array
846 for (Int_t i=0; i<fN; ++i) arr->Add(fClusters[i]);