2 /**************************************************************************
3 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * Author: The ALICE Off-line Project. *
6 * Contributors are mentioned in the code where appropriate. *
8 * Permission to use, copy, modify and distribute this software and its *
9 * documentation strictly for non-commercial purposes is hereby granted *
10 * without fee, provided that the above copyright notice appears in all *
11 * copies and that both the copyright notice and this permission notice *
12 * appear in the supporting documentation. The authors make no claims *
13 * about the suitability of this software for any purpose. It is *
14 * provided "as is" without express or implied warranty. *
15 **************************************************************************/
21 #include "AliESDtrack.h"
22 #include "AliTracker.h"
24 #include "AliTRDtrackV1.h"
25 #include "AliTRDcluster.h"
26 #include "AliTRDcalibDB.h"
27 #include "AliTRDReconstructor.h"
28 #include "AliTRDPIDResponse.h"
29 #include "AliTRDrecoParam.h"
30 #include "AliTRDdEdxBaseUtils.h"
31 #include "AliTRDdEdxCalibHistArray.h"
32 #include "AliTRDdEdxCalibUtils.h"
33 #include "AliTRDdEdxReconUtils.h"
35 ClassImp(AliTRDtrackV1)
37 ///////////////////////////////////////////////////////////////////////////////
39 // Represents a reconstructed TRD track //
40 // Local TRD Kalman track //
43 // Alex Bercuci <A.Bercuci@gsi.de> //
44 // Markus Fasel <M.Fasel@gsi.de> //
46 ///////////////////////////////////////////////////////////////////////////////
48 //_______________________________________________________________
49 AliTRDtrackV1::AliTRDtrackV1() : AliKalmanTrack()
57 ,fkReconstructor(NULL)
63 // Default constructor
65 //printf("AliTRDtrackV1::AliTRDtrackV1()\n");
67 for(int i =0; i<3; i++) fBudget[i] = 0.;
69 Float_t pid = 1./AliPID::kSPECIES;
70 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
72 for(int ip=0; ip<kNplane; ip++){
73 fTrackletIndex[ip] = -1;
76 SetLabel(-123456789); // reset label
79 //_______________________________________________________________
80 AliTRDtrackV1::AliTRDtrackV1(const AliTRDtrackV1 &ref) : AliKalmanTrack(ref)
84 ,fTruncatedMean(ref.fTruncatedMean)
85 ,fNchamberdEdx(ref.fNchamberdEdx)
86 ,fNclusterdEdx(ref.fNclusterdEdx)
87 ,fNdEdxSlices(ref.fNdEdxSlices)
88 ,fkReconstructor(ref.fkReconstructor)
97 //printf("AliTRDtrackV1::AliTRDtrackV1(const AliTRDtrackV1 &)\n");
98 SetBit(kOwner, kFALSE);
99 for(int ip=0; ip<kNplane; ip++){
100 fTrackletIndex[ip] = ref.fTrackletIndex[ip];
101 fTracklet[ip] = ref.fTracklet[ip];
103 if(ref.fTrackLow) fTrackLow = new AliExternalTrackParam(*ref.fTrackLow);
104 if(ref.fTrackHigh) fTrackHigh = new AliExternalTrackParam(*ref.fTrackHigh);
106 for (Int_t i = 0; i < 3;i++) fBudget[i] = ref.fBudget[i];
108 for(Int_t is = 0; is<AliPID::kSPECIES; is++) fPID[is] = ref.fPID[is];
110 AliKalmanTrack::SetNumberOfClusters(ref.GetNumberOfClusters());
113 //_______________________________________________________________
114 AliTRDtrackV1::AliTRDtrackV1(const AliESDtrack &t) : AliKalmanTrack()
122 ,fkReconstructor(NULL)
128 // Constructor from AliESDtrack
132 SetLabel(t.GetLabel());
135 SetMass(t.GetMassForTracking());
136 AliKalmanTrack::SetNumberOfClusters(t.GetTRDncls());
137 Int_t ti[]={-1, -1, -1, -1, -1, -1}; t.GetTRDtracklets(&ti[0]);
138 for(int ip=0; ip<kNplane; ip++){
139 fTrackletIndex[ip] = ti[ip];
140 fTracklet[ip] = NULL;
142 for(int i =0; i<3; i++) fBudget[i] = 0.;
144 Float_t pid = 1./AliPID::kSPECIES;
145 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
147 const AliExternalTrackParam *par = &t;
149 if (t.GetStatus() & AliESDtrack::kTRDbackup) {
150 par = t.GetOuterParam();
152 AliError("No backup info!");
160 ,par->GetCovariance());
162 if(t.GetStatus() & AliESDtrack::kTIME) {
164 Double_t times[AliPID::kSPECIESC];
165 t.GetIntegratedTimes(times,AliPID::kSPECIESC);
166 SetIntegratedTimes(times);
167 SetIntegratedLength(t.GetIntegratedLength());
171 //_______________________________________________________________
172 AliTRDtrackV1::AliTRDtrackV1(AliTRDseedV1 * const trklts, const Double_t p[5], const Double_t cov[15]
173 , Double_t x, Double_t alpha) : AliKalmanTrack()
181 ,fkReconstructor(NULL)
187 // The stand alone tracking constructor
188 // TEMPORARY !!!!!!!!!!!
190 // 1. covariance matrix
191 // 2. dQdl calculation
195 Double_t cnv = (TMath::Abs(b) < 1.e-5) ? 1.e5 : 1./GetBz()/kB2C;
197 Double_t pp[5] = { p[0]
203 Double_t c22 = x*x*cov[14] - 2*x*cov[12] + cov[ 5];
204 Double_t c32 = x*cov[13] - cov[ 8];
205 Double_t c20 = x*cov[10] - cov[ 3];
206 Double_t c21 = x*cov[11] - cov[ 4];
207 Double_t c42 = x*cov[14] - cov[12];
209 Double_t cc[15] = { cov[ 0]
212 , cov[ 6], cov[ 7], c32, cov[ 9]
213 , cov[10]*cnv, cov[11]*cnv, c42*cnv, cov[13]*cnv, cov[14]*cnv*cnv };
215 Double_t mostProbablePt=AliExternalTrackParam::GetMostProbablePt();
216 Double_t p0=TMath::Sign(1/mostProbablePt,pp[4]);
217 Double_t w0=cc[14]/(cc[14] + p0*p0), w1=p0*p0/(cc[14] + p0*p0);
218 AliDebug(3, Form("Pt mixing : w0[%4.2f] pt0[%5.3f] w1[%4.2f] pt[%5.3f]", w0, 1./p0, w1, 1./pp[4]));
220 pp[4] = w0*p0 + w1*pp[4];
221 cc[10]*=w1; cc[11]*=w1; cc[12]*=w1; cc[13]*=w1; cc[14]*=w1;
223 AliDebug(2, Form("Init @ x[%6.2f] pt[%5.3f]", x, 1./pp[4]));
225 for(int iplane=0; iplane<kNplane; iplane++){
226 fTrackletIndex[iplane] = -1;
227 if(!trklts[iplane].IsOK()) fTracklet[iplane] = NULL;
229 fTracklet[iplane] = &trklts[iplane];
230 ncls += fTracklet[iplane]->GetN();
233 AliKalmanTrack::SetNumberOfClusters(ncls);
234 for(int i =0; i<3; i++) fBudget[i] = 0.;
236 Float_t pid = 1./AliPID::kSPECIES;
237 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
238 SetLabel(-123456789); // reset label
241 //_______________________________________________________________
242 AliTRDtrackV1::~AliTRDtrackV1()
244 // Clean up all objects allocated by the track during its lifetime.
245 AliDebug(2, Form("Deleting track[%d]\n fBackupTrack[%p] fTrackLow[%p] fTrackHigh[%p] Owner[%c].", fESDid, (void*)fBackupTrack, (void*)fTrackLow, (void*)fTrackHigh, TestBit(kOwner)?'y':'n'));
247 if(fBackupTrack) delete fBackupTrack; fBackupTrack = NULL;
249 if(fTrackLow) delete fTrackLow; fTrackLow = NULL;
250 if(fTrackHigh) delete fTrackHigh; fTrackHigh = NULL;
252 for(Int_t ip=0; ip<kNplane; ip++){
253 if(TestBit(kOwner) && fTracklet[ip]) delete fTracklet[ip];
254 fTracklet[ip] = NULL;
255 fTrackletIndex[ip] = -1;
259 //_______________________________________________________________
260 AliTRDtrackV1 &AliTRDtrackV1::operator=(const AliTRDtrackV1 &t)
263 // Assignment operator
267 AliKalmanTrack::operator=(t);
268 ((AliTRDtrackV1 &) t).Copy(*this);
275 //_____________________________________________________________________________
276 void AliTRDtrackV1::Copy(TObject &t) const
282 ((AliTRDtrackV1 &) t).fStatus = fStatus;
283 ((AliTRDtrackV1 &) t).fESDid = fESDid;
284 ((AliTRDtrackV1 &) t).fDE = fDE;
285 ((AliTRDtrackV1 &) t).fkReconstructor = fkReconstructor;
286 ((AliTRDtrackV1 &) t).fBackupTrack = 0x0;
287 ((AliTRDtrackV1 &) t).fTrackLow = 0x0;
288 ((AliTRDtrackV1 &) t).fTrackHigh = 0x0;
290 for(Int_t ip = 0; ip < kNplane; ip++) {
291 ((AliTRDtrackV1 &) t).fTrackletIndex[ip] = fTrackletIndex[ip];
292 ((AliTRDtrackV1 &) t).fTracklet[ip] = fTracklet[ip];
295 ((AliTRDtrackV1 &) t).fTrackLow = new AliExternalTrackParam(*fTrackLow);
298 ((AliTRDtrackV1 &) t).fTrackHigh = new AliExternalTrackParam(*fTrackHigh);
301 for (Int_t i = 0; i < 3; i++) {
302 ((AliTRDtrackV1 &) t).fBudget[i] = fBudget[i];
304 for (Int_t is = 0; is < AliPID::kSPECIES; is++) {
305 ((AliTRDtrackV1 &) t).fPID[is] = fPID[is];
310 //_______________________________________________________________
311 Int_t AliTRDtrackV1::CookLabel(Float_t wrong, Int_t *labs, Float_t *freq)
313 // Set MC label for this track
314 // On demand i.e. if arrays "labs" and "freq" are allocated by user returns :
315 // nlabs = the no of distinct labels
316 // labs = array of distinct labels in decreasing order of frequency
317 // freq = frequency of each label in decreasing order
320 if(!(ncl = GetNumberOfClusters())) return 0;
322 Int_t s[2][kMAXCLUSTERSPERTRACK];
323 for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
328 Int_t label(-123456789), nlabels(0);
329 AliTRDcluster *c(NULL);
330 for (Int_t ip(0); ip < AliTRDgeometry::kNlayer; ip++) {
331 if(fTrackletIndex[ip]<0 || !fTracklet[ip]) continue;
332 for (Int_t ic(0); ic < AliTRDseedV1::kNclusters; ic++) {
333 if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
334 for (Int_t k(0); k < 3; k++) {
335 if ((label = c->GetLabel(k)) < 0) continue;
337 while(j < kMAXCLUSTERSPERTRACK){
338 if(s[0][j]!=label && s[1][j]!=0){j++; continue;}
339 if(!s[1][j]) nlabels++;
340 s[0][j] = label; s[1][j]++;
346 //printf(" Found %4d labels\n", nlabels);
349 AliError(Form("No MC labels found for track %d.", fESDid));
351 } else if(nlabels==1) {
353 if(labs && freq){labs[0]=label; freq[0]=1.;}
355 Int_t idx[kMAXCLUSTERSPERTRACK];
356 TMath::Sort(nlabels, s[1], idx);
357 label = s[0][idx[0]]; prob = s[1][idx[0]]/Float_t(ncl);
359 for (Int_t i(0); i<nlabels; i++){
360 labs[i] = s[0][idx[i]];
361 freq[i] = s[1][idx[i]]/Float_t(ncl);
365 SetLabel((1.-prob > wrong)?-label:label);
369 //_______________________________________________________________
370 Bool_t AliTRDtrackV1::CookPID()
373 // Cook the PID information for the track by delegating the omonim function of the tracklets.
374 // Computes the number of tracklets used. The tracklet information are considered independent.
375 // For the moment no global track measurement of PID is performed as for example to estimate
376 // bremsstrahlung probability based on global chi2 of the track.
378 // The status bit AliESDtrack::kTRDpid is set during the call of AliTRDtrackV1::UpdateESDtrack().The PID performance of the
379 //TRD for tracks with 6 tacklets is displayed below.
381 //<img src="TRD/trackPID.gif">
384 const AliTRDPIDResponse *pidResponse = AliTRDcalibDB::Instance()->GetPIDResponse(fkReconstructor->GetRecoParam()->GetPIDmethod());
386 AliError("PID Response not available");
389 Double_t dEdx[kNplane * (Int_t)AliTRDseedV1::kNdEdxSlices] = {0.};
390 Float_t trackletP[kNplane] = {0.};
392 fNdEdxSlices = pidResponse->GetNumberOfSlices();
393 for(Int_t iseed = 0; iseed < kNplane; iseed++){
394 if(!fTracklet[iseed]) continue;
395 trackletP[iseed] = fTracklet[iseed]->GetMomentum();
396 // if(pidResponse->GetPIDmethod() == AliTRDPIDResponse::kLQ1D){
397 dEdx[iseed] = fTracklet[iseed]->GetdQdl();
399 fTracklet[iseed]->CookdEdx(fNdEdxSlices);
400 const Float_t *trackletdEdx = fTracklet[iseed]->GetdEdx();
401 for(Int_t islice = 0; islice < fNdEdxSlices; islice++){
402 dEdx[iseed*fNdEdxSlices + islice] = trackletdEdx[islice];
406 pidResponse->GetResponse(fNdEdxSlices, dEdx, trackletP, fPID);
408 static Int_t nprint = 0;
410 AliTRDdEdxBaseUtils::PrintControl();
415 AliTRDdEdxCalibUtils::SetObjArray(AliTRDcalibDB::Instance()->GetPHQ());
416 const Double_t mag = AliTRDdEdxBaseUtils::IsExBOn() ? GetBz() : -1;
417 const Double_t charge = AliTRDdEdxBaseUtils::IsExBOn() ? Charge() : -1;
418 fTruncatedMean = CookTruncatedMean(0, mag, charge, kTRUE, fNchamberdEdx, fNclusterdEdx);
423 //___________________________________________________________
424 UChar_t AliTRDtrackV1::GetNumberOfTrackletsPID() const
426 // Retrieve number of tracklets used for PID calculation.
429 for(int ip=0; ip<kNplane; ip++){
430 if(fTrackletIndex[ip]<0 || !fTracklet[ip]) continue;
431 if(!fTracklet[ip]->IsOK()) continue;
438 //_______________________________________________________________
439 AliTRDcluster* AliTRDtrackV1::GetCluster(Int_t id)
441 // Get the cluster at a certain position in the track
443 for(Int_t ip=0; ip<kNplane; ip++){
444 if(!fTracklet[ip]) continue;
445 if(n+fTracklet[ip]->GetN() <= id){
446 n+=fTracklet[ip]->GetN();
449 AliTRDcluster *c = NULL;
450 for(Int_t ic=AliTRDseedV1::kNclusters; ic--;){
451 if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
453 if(n<id){n++; continue;}
460 //_______________________________________________________________
461 Int_t AliTRDtrackV1::GetClusterIndex(Int_t id) const
463 // Get the cluster index at a certain position in the track
465 for(Int_t ip=0; ip<kNplane; ip++){
466 if(!fTracklet[ip]) continue;
467 if(n+fTracklet[ip]->GetN() <= id){
468 n+=fTracklet[ip]->GetN();
471 for(Int_t ic=AliTRDseedV1::kNclusters; ic--;){
472 if(!(fTracklet[ip]->GetClusters(ic))) continue;
473 if(n<id){n++; continue;}
474 return fTracklet[ip]->GetIndexes(ic);
480 //_______________________________________________________________
481 Double_t AliTRDtrackV1::GetPredictedChi2(const AliTRDseedV1 *trklt, Double_t *cov) const
483 // Compute chi2 between tracklet and track. The value is calculated at the radial position of the track
484 // equal to the reference radial position of the tracklet (see AliTRDseedV1)
486 // The chi2 estimator is computed according to the following formula
488 // #chi^{2}=(X_{trklt}-X_{track})(C_{trklt}+C_{track})^{-1}(X_{trklt}-X_{track})^{T}
490 // where X=(y z), the position of the track/tracklet in the yz plane
493 Double_t p[2] = { trklt->GetY(), trklt->GetZ()};
494 trklt->GetCovAt(trklt->GetX(), cov);
495 return AliExternalTrackParam::GetPredictedChi2(p, cov);
498 //_______________________________________________________________
499 Int_t AliTRDtrackV1::GetSector() const
501 return Int_t(GetAlpha()/AliTRDgeometry::GetAlpha() + (GetAlpha()>0. ? 0 : AliTRDgeometry::kNsector));
504 //_______________________________________________________________
505 Bool_t AliTRDtrackV1::IsEqual(const TObject *o) const
507 // Checks whether two tracks are equal
508 if (!o) return kFALSE;
509 const AliTRDtrackV1 *inTrack = dynamic_cast<const AliTRDtrackV1*>(o);
510 if (!inTrack) return kFALSE;
512 //if ( fPIDquality != inTrack->GetPIDquality() ) return kFALSE;
514 if(memcmp(fPID, inTrack->fPID, AliPID::kSPECIES*sizeof(Double32_t))) return kFALSE;
515 if(memcmp(fBudget, inTrack->fBudget, 3*sizeof(Double32_t))) return kFALSE;
516 if(memcmp(&fDE, &inTrack->fDE, sizeof(Double32_t))) return kFALSE;
517 if(memcmp(&fFakeRatio, &inTrack->fFakeRatio, sizeof(Double32_t))) return kFALSE;
518 if(memcmp(&fChi2, &inTrack->fChi2, sizeof(Double32_t))) return kFALSE;
519 if(memcmp(&fMass, &inTrack->fMass, sizeof(Double32_t))) return kFALSE;
520 if( fLab != inTrack->fLab ) return kFALSE;
521 if( fN != inTrack->fN ) return kFALSE;
522 Double32_t l(0.), in(0.);
523 l = GetIntegratedLength(); in = inTrack->GetIntegratedLength();
524 if(memcmp(&l, &in, sizeof(Double32_t))) return kFALSE;
525 l=GetX(); in=inTrack->GetX();
526 if(memcmp(&l, &in, sizeof(Double32_t))) return kFALSE;
527 l = GetAlpha(); in = inTrack->GetAlpha();
528 if(memcmp(&l, &in, sizeof(Double32_t))) return kFALSE;
529 if(memcmp(GetParameter(), inTrack->GetParameter(), 5*sizeof(Double32_t))) return kFALSE;
530 if(memcmp(GetCovariance(), inTrack->GetCovariance(), 15*sizeof(Double32_t))) return kFALSE;
532 for (Int_t iTracklet = 0; iTracklet < kNplane; iTracklet++){
533 AliTRDseedV1 *curTracklet = fTracklet[iTracklet];
534 AliTRDseedV1 *inTracklet = inTrack->GetTracklet(iTracklet);
535 if (curTracklet && inTracklet){
536 if (! curTracklet->IsEqual(inTracklet) ) {
537 curTracklet->Print();
542 // if one tracklet exists, and corresponding
543 // in other track doesn't - return kFALSE
544 if(inTracklet || curTracklet) return kFALSE;
551 //_______________________________________________________________
552 Bool_t AliTRDtrackV1::IsElectron() const
554 if(GetPID(0) > fkReconstructor->GetRecoParam()->GetPIDThreshold(GetP())) return kTRUE;
559 //_____________________________________________________________________________
560 Int_t AliTRDtrackV1::MakeBackupTrack()
563 // Creates a backup track
564 // TO DO update quality check of the track.
567 Float_t occupancy(0.); Int_t n(0), ncls(0);
568 for(Int_t il(AliTRDgeometry::kNlayer); il--;){
569 if(!fTracklet[il]) continue;
571 occupancy+=fTracklet[il]->GetTBoccupancy()/AliTRDseedV1::kNtb;
572 ncls += fTracklet[il]->GetN();
577 //Float_t ratio1 = Float_t(t.GetNumberOfClusters()+1) / Float_t(t.GetNExpected()+1);
579 Int_t failedCutId(0);
580 if(GetChi2()/n > 5.0) failedCutId=1;
581 if(occupancy < 0.7) failedCutId=2;
582 //if(ratio1 > 0.6) &&
583 //if(ratio0+ratio1 > 1.5) &&
584 if(GetNCross() != 0) failedCutId=3;
585 if(TMath::Abs(GetSnp()) > 0.85) failedCutId=4;
586 if(ncls < 20) failedCutId=5;
589 AliDebug(2, Form("\n"
590 "chi2/tracklet < 5.0 [%c] %5.2f\n"
591 "occupancy > 0.7 [%c] %4.2f\n"
592 "NCross == 0 [%c] %d\n"
593 "Abs(snp) < 0.85 [%c] %4.2f\n"
594 "NClusters > 20 [%c] %d"
595 ,(GetChi2()/n<5.0)?'y':'n', GetChi2()/n
596 ,(occupancy>0.7)?'y':'n', occupancy
597 ,(GetNCross()==0)?'y':'n', GetNCross()
598 ,(TMath::Abs(GetSnp())<0.85)?'y':'n', TMath::Abs(GetSnp())
599 ,(ncls>20)?'y':'n', ncls
605 fBackupTrack->~AliTRDtrackV1();
606 new(fBackupTrack) AliTRDtrackV1((AliTRDtrackV1&)(*this));
609 fBackupTrack = new AliTRDtrackV1((AliTRDtrackV1&)(*this));
613 //_____________________________________________________________________________
614 Int_t AliTRDtrackV1::GetProlongation(Double_t xk, Double_t &y, Double_t &z) const
617 // Find a prolongation at given x
618 // Return -1 if it does not exist
621 Double_t bz = GetBz();
622 if (!AliExternalTrackParam::GetYAt(xk,bz,y)) return -1;
623 if (!AliExternalTrackParam::GetZAt(xk,bz,z)) return -1;
629 //_____________________________________________________________________________
630 Bool_t AliTRDtrackV1::PropagateTo(Double_t xk, Double_t xx0, Double_t xrho)
633 // Propagates this track to a reference plane defined by "xk" [cm]
634 // correcting for the mean crossed material.
636 // "xx0" - thickness/rad.length [units of the radiation length]
637 // "xrho" - thickness*density [g/cm^2]
640 if (TMath::Abs(xk - GetX())<AliTRDReconstructor::GetEpsilon()*0.1) return kTRUE; // 10% of the tracker precision
642 Double_t xyz0[3] = {GetX(), GetY(), GetZ()}, // track position BEFORE propagation
643 b[3]; // magnetic field
645 if(!AliExternalTrackParam::PropagateToBxByBz(xk,b)) return kFALSE;
647 // local track position AFTER propagation
648 Double_t xyz1[3] = {GetX(), GetY(), GetZ()};
649 // printf("x0[%6.2f] -> x1[%6.2f] dx[%6.2f] rho[%f]\n", xyz0[0], xyz1[0], xyz0[0]-xk, xrho/TMath::Abs(xyz0[0]-xk));
652 if (IsStartedTimeIntegral()) {
653 Double_t l2 = TMath::Sqrt((xyz1[0]-xyz0[0])*(xyz1[0]-xyz0[0])
654 + (xyz1[1]-xyz0[1])*(xyz1[1]-xyz0[1])
655 + (xyz1[2]-xyz0[2])*(xyz1[2]-xyz0[2]));
656 Double_t crv = AliExternalTrackParam::GetC(b[2]);
657 if (TMath::Abs(l2*crv) > 0.0001) {
658 // Make correction for curvature if neccesary
659 l2 = 0.5 * TMath::Sqrt((xyz1[0]-xyz0[0])*(xyz1[0]-xyz0[0])
660 + (xyz1[1]-xyz0[1])*(xyz1[1]-xyz0[1]));
661 l2 = 2.0 * TMath::ASin(l2 * crv) / crv;
662 l2 = TMath::Sqrt(l2*l2 + (xyz1[2]-xyz0[2])*(xyz1[2]-xyz0[2]));
667 if (!AliExternalTrackParam::CorrectForMeanMaterial(xx0, xrho, fMass)) return kFALSE;
673 Double_t p2 = (1.0 + GetTgl()*GetTgl()) / (GetSigned1Pt()*GetSigned1Pt());
674 if (fMass<0) p2 *= 4; // q=2
675 Double_t beta2 = p2 / (p2 + fMass*fMass);
676 if ((beta2 < 1.0e-10) ||
677 ((5940.0 * beta2/(1.0 - beta2 + 1.0e-10) - beta2) < 0.0)) {
681 Double_t dE = 0.153e-3 / beta2
682 * (TMath::Log(5940.0 * beta2/(1.0 - beta2 + 1.0e-10)) - beta2)
684 if (fMass<0) dE *= 4; // q=2
688 // Suspicious part - think about it ?
689 Double_t kinE = TMath::Sqrt(p2);
690 if (dE > 0.8*kinE) dE = 0.8 * kinE; //
691 if (dE < 0) dE = 0.0; // Not valid region for Bethe bloch
698 Double_t sigmade = 0.07 * TMath::Sqrt(TMath::Abs(dE)); // Energy loss fluctuation
699 Double_t sigmac2 = sigmade*sigmade*fC*fC*(p2+fMass*fMass)/(p2*p2);
701 fCee += fX*fX * sigmac2;
709 //_____________________________________________________________________________
710 Int_t AliTRDtrackV1::PropagateToR(Double_t r,Double_t step)
713 // Propagate track to the radial position
714 // Rotation always connected to the last track position
722 Double_t radius = TMath::Sqrt(GetX()*GetX() + GetY()*GetY());
724 Double_t dir = (radius > r) ? -1.0 : 1.0;
726 for (Double_t x = radius+dir*step; dir*x < dir*r; x += dir*step) {
729 Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
732 if(GetProlongation(x,y,z)<0) return -1;
733 xyz1[0] = x * TMath::Cos(alpha) + y * TMath::Sin(alpha);
734 xyz1[1] = x * TMath::Sin(alpha) - y * TMath::Cos(alpha);
737 if(AliTracker::MeanMaterialBudget(xyz0,xyz1,param)<=0.) return -1;
739 param[1] = 100000000;
741 PropagateTo(x,param[1],param[0]*param[4]);
746 Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
749 if(GetProlongation(r,y,z)<0) return -1;
750 xyz1[0] = r * TMath::Cos(alpha) + y * TMath::Sin(alpha);
751 xyz1[1] = r * TMath::Sin(alpha) - y * TMath::Cos(alpha);
754 if(AliTracker::MeanMaterialBudget(xyz0,xyz1,param) <= 0.) return -1;
757 param[1] = 100000000;
759 PropagateTo(r,param[1],param[0]*param[4]);
765 //_____________________________________________________________________________
766 void AliTRDtrackV1::Print(Option_t *o) const
768 // Print track status
769 AliInfo(Form("PID [%4.1f %4.1f %4.1f %4.1f %4.1f]", 1.E2*fPID[0], 1.E2*fPID[1], 1.E2*fPID[2], 1.E2*fPID[3], 1.E2*fPID[4]));
770 AliInfo(Form("Material[%5.2f %5.2f %5.2f]", fBudget[0], fBudget[1], fBudget[2]));
772 AliInfo(Form("x[%7.2f] t[%7.4f] alpha[%f] mass[%f]", GetX(), GetIntegratedLength(), GetAlpha(), fMass));
773 AliInfo(Form("Ntr[%1d] NtrPID[%1d] Ncl[%3d] lab[%3d]", GetNumberOfTracklets(), GetNumberOfTrackletsPID(), fN, fLab));
776 const Double_t *curP = GetParameter();
777 for (Int_t i = 0; i < 5; i++) printf("%7.2f ", curP[i]);
781 const Double_t *curC = GetCovariance();
782 for (Int_t i = 0, j=4, k=0; i<15; i++, k++){
783 printf("%7.2f ", curC[i]);
789 if(strcmp(o, "a")!=0) return;
791 for(Int_t ip=0; ip<kNplane; ip++){
792 if(!fTracklet[ip]) continue;
793 fTracklet[ip]->Print(o);
798 //_____________________________________________________________________________
799 Bool_t AliTRDtrackV1::Rotate(Double_t alpha, Bool_t absolute)
802 // Rotates track parameters in R*phi plane
803 // if absolute rotation alpha is in global system
804 // otherwise alpha rotation is relative to the current rotation angle
807 if (absolute) alpha -= GetAlpha();
810 return AliExternalTrackParam::Rotate(GetAlpha()+alpha);
813 //___________________________________________________________
814 void AliTRDtrackV1::SetNumberOfClusters()
816 // Calculate the number of clusters attached to this track
819 for(int ip=0; ip<kNplane; ip++){
820 if(fTracklet[ip] && fTrackletIndex[ip] >= 0) ncls += fTracklet[ip]->GetN();
822 AliKalmanTrack::SetNumberOfClusters(ncls);
826 //_______________________________________________________________
827 void AliTRDtrackV1::SetOwner()
830 // Toggle ownership of tracklets
833 if(TestBit(kOwner)) return;
834 for (Int_t ip = 0; ip < kNplane; ip++) {
835 if(fTrackletIndex[ip]<0 || !fTracklet[ip]) continue;
836 fTracklet[ip] = new AliTRDseedV1(*fTracklet[ip]);
837 fTracklet[ip]->SetOwner();
842 //_______________________________________________________________
843 void AliTRDtrackV1::SetTracklet(AliTRDseedV1 *const trklt, Int_t index)
848 Int_t plane = trklt->GetPlane();
850 fTracklet[plane] = trklt;
851 fTrackletIndex[plane] = index;
854 //_______________________________________________________________
855 void AliTRDtrackV1::SetTrackIn()
857 // Save location of birth for the TRD track
858 // If the pointer is not valid allocate memory
860 const AliExternalTrackParam *op = dynamic_cast<const AliExternalTrackParam*>(this);
862 //printf("SetTrackIn() : fTrackLow[%p]\n", (void*)fTrackLow);
864 fTrackLow->~AliExternalTrackParam();
865 new(fTrackLow) AliExternalTrackParam(*op);
866 } else fTrackLow = new AliExternalTrackParam(*op);
869 //_______________________________________________________________
870 void AliTRDtrackV1::SetTrackOut(const AliExternalTrackParam *op)
872 // Save location of death for the TRD track
873 // If the pointer is not valid allocate memory
875 if(!op) op = dynamic_cast<const AliExternalTrackParam*>(this);
877 fTrackHigh->~AliExternalTrackParam();
878 new(fTrackHigh) AliExternalTrackParam(*op);
879 } else fTrackHigh = new AliExternalTrackParam(*op);
882 //_______________________________________________________________
883 void AliTRDtrackV1::UnsetTracklet(Int_t plane)
886 fTrackletIndex[plane] = -1;
887 fTracklet[plane] = NULL;
891 //_______________________________________________________________
892 void AliTRDtrackV1::UpdateChi2(Float_t chi2)
894 // Update chi2/track with one tracklet contribution
895 SetChi2(GetChi2() + chi2);
898 //_______________________________________________________________
899 void AliTRDtrackV1::UpdateESDtrack(AliESDtrack *track)
902 // Update the TRD PID information in the ESD track
905 // Int_t nslices = AliTRDcalibDB::Instance()->GetPIDResponse(fkReconstructor->GetRecoParam()->GetPIDmethod())->GetNumberOfSlices();
906 // number of tracklets used for PID calculation
907 UChar_t nPID = GetNumberOfTrackletsPID();
908 // number of tracklets attached to the track
909 UChar_t nTrk = GetNumberOfTracklets();
910 // pack the two numbers together and store them in the ESD
911 track->SetTRDntracklets(nPID | (nTrk<<3));
912 // allocate space to store raw PID signals dEdx & momentum
913 // independent of the method used to calculate PID (see below AliTRDPIDResponse)
914 track->SetNumberOfTRDslices((AliTRDseedV1::kNdEdxSlices+2)*AliTRDgeometry::kNlayer);
916 Float_t p, sp; Double_t spd;
917 for (Int_t ip = 0; ip < kNplane; ip++) {
918 if(fTrackletIndex[ip]<0 || !fTracklet[ip]) continue;
919 // Fill TRD dEdx info into ESD track
920 // a. Set Summed dEdx into the first slice
921 track->SetTRDslice(fTracklet[ip]->GetdQdl(), ip, 0);
922 // b. Set NN dEdx slices
923 fTracklet[ip]->CookdEdx(AliTRDPIDResponse::kNslicesNN);
924 const Float_t *dedx = fTracklet[ip]->GetdEdx();
925 for (Int_t js(0), ks(1); js < AliTRDPIDResponse::kNslicesNN; js++, ks++, dedx++){
926 if(ks>=AliTRDseedV1::kNdEdxSlices){
927 AliError(Form("Exceed allocated space for dEdx slices."));
930 track->SetTRDslice(*dedx, ip, ks);
932 // fill TRD momentum info into ESD track
933 p = fTracklet[ip]->GetMomentum(&sp); spd = sp;
934 track->SetTRDmomentum(p, ip, &spd);
935 // store global quality per tracklet instead of momentum error
936 // 26.09.11 A.Bercuci
937 // first implementation store no. of time bins filled in tracklet (5bits see "y" bits) and
938 // no. of double clusters in case of pad row cross (4bits see "x" bits)
939 // bit map for tracklet quality xxxxyyyyy
940 // 27.10.11 A.Bercuci
941 // add chamber status bit "z" bit
942 // bit map for tracklet quality zxxxxyyyyy
943 // 12.11.11 A.Bercuci
944 // fit tracklet quality into the field fTRDTimeBin [Char_t]
945 // bit map for tracklet quality zxxyyyyy
946 // The information should be retrieved by the following functions of AliESDtrack for each TRD layer
947 // GetTRDtrkltOccupancy(layer) -> no of TB filled in tracklet
948 // GetTRDtrkltClCross(layer) -> no of TB filled in crossing pad rows
949 // IsTRDtrkltChmbGood(layer) -> status of the chamber from which the tracklet is found
950 Int_t nCross(fTracklet[ip]->IsRowCross()?fTracklet[ip]->GetTBcross():0); if(nCross>3) nCross = 3;
951 Char_t trackletQ = Char_t(fTracklet[ip]->GetTBoccupancy() | (nCross<<5) | (fTracklet[ip]->IsChmbGood()<<7));
952 track->SetTRDTimBin(trackletQ, ip);
954 // store PID probabilities
955 track->SetTRDpid(fPID);
957 //store truncated mean
958 track->SetTRDsignal(fTruncatedMean);
959 track->SetTRDNchamberdEdx(fNchamberdEdx);
960 track->SetTRDNclusterdEdx(fNclusterdEdx);
963 //_______________________________________________________________
964 Double_t AliTRDtrackV1::CookTruncatedMean(const Bool_t kinvq, const Double_t mag, const Int_t charge, const Int_t kcalib, Int_t &nch, Int_t &ncls, TVectorD *Qs, TVectorD *Xs, Int_t timeBin0, Int_t timeBin1, Int_t tstep) const
967 //Origin: Xianguo Lu <xianguo.lu@cern.ch>, Marian Ivanov <marian.ivanov@cern.ch>
970 TVectorD arrayQ(200), arrayX(200);
971 ncls = AliTRDdEdxReconUtils::GetArrayClusterQ(kinvq, &arrayQ, &arrayX, this, timeBin0, timeBin1, tstep);
973 const TObjArray *cobj = kcalib ? AliTRDdEdxCalibUtils::GetObj(kinvq, mag, charge) : NULL;
975 const Double_t tmean = AliTRDdEdxReconUtils::ToyCook(kinvq, ncls, &arrayQ, &arrayX, cobj);
977 nch = AliTRDdEdxReconUtils::UpdateArrayX(ncls, &arrayX);
984 //printf("\ntest %.10f %d %d\n", tmean, nch, ncls);
989 //_______________________________________________________________
990 TObject* AliTRDtrackV1::Clone(const char* newname) const
992 // temporary override TObject::Clone to avoid crashes in reco
993 AliTRDtrackV1* src = (AliTRDtrackV1*)this;
994 Bool_t isown = src->IsOwner();
995 AliInfo(Form("src_owner %d",isown));
996 AliTRDtrackV1* dst = new AliTRDtrackV1(*src);