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()
56 ,fkReconstructor(NULL)
62 // Default constructor
64 //printf("AliTRDtrackV1::AliTRDtrackV1()\n");
66 for(int i =0; i<3; i++) fBudget[i] = 0.;
68 Float_t pid = 1./AliPID::kSPECIES;
69 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
71 for(int ip=0; ip<kNplane; ip++){
72 fTrackletIndex[ip] = -1;
77 //_______________________________________________________________
78 AliTRDtrackV1::AliTRDtrackV1(const AliTRDtrackV1 &ref) : AliKalmanTrack(ref)
82 ,fTruncatedMean(ref.fTruncatedMean)
83 ,fNchamberdEdx(ref.fNchamberdEdx)
84 ,fNclusterdEdx(ref.fNclusterdEdx)
85 ,fkReconstructor(ref.fkReconstructor)
94 //printf("AliTRDtrackV1::AliTRDtrackV1(const AliTRDtrackV1 &)\n");
95 SetBit(kOwner, kFALSE);
96 for(int ip=0; ip<kNplane; ip++){
97 fTrackletIndex[ip] = ref.fTrackletIndex[ip];
98 fTracklet[ip] = ref.fTracklet[ip];
100 if(ref.fTrackLow) fTrackLow = new AliExternalTrackParam(*ref.fTrackLow);
101 if(ref.fTrackHigh) fTrackHigh = new AliExternalTrackParam(*ref.fTrackHigh);
103 for (Int_t i = 0; i < 3;i++) fBudget[i] = ref.fBudget[i];
105 for(Int_t is = 0; is<AliPID::kSPECIES; is++) fPID[is] = ref.fPID[is];
107 AliKalmanTrack::SetNumberOfClusters(ref.GetNumberOfClusters());
110 //_______________________________________________________________
111 AliTRDtrackV1::AliTRDtrackV1(const AliESDtrack &t) : AliKalmanTrack()
118 ,fkReconstructor(NULL)
124 // Constructor from AliESDtrack
128 SetLabel(t.GetLabel());
131 SetMass(t.GetMass(kTRUE));
132 AliKalmanTrack::SetNumberOfClusters(t.GetTRDncls());
133 Int_t ti[]={-1, -1, -1, -1, -1, -1}; t.GetTRDtracklets(&ti[0]);
134 for(int ip=0; ip<kNplane; ip++){
135 fTrackletIndex[ip] = ti[ip];
136 fTracklet[ip] = NULL;
138 for(int i =0; i<3; i++) fBudget[i] = 0.;
140 Float_t pid = 1./AliPID::kSPECIES;
141 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
143 const AliExternalTrackParam *par = &t;
144 if (t.GetStatus() & AliESDtrack::kTRDbackup) {
145 par = t.GetOuterParam();
147 AliError("No backup info!");
154 ,par->GetCovariance());
156 if(t.GetStatus() & AliESDtrack::kTIME) {
159 t.GetIntegratedTimes(times);
160 SetIntegratedTimes(times);
161 SetIntegratedLength(t.GetIntegratedLength());
165 //_______________________________________________________________
166 AliTRDtrackV1::AliTRDtrackV1(AliTRDseedV1 * const trklts, const Double_t p[5], const Double_t cov[15]
167 , Double_t x, Double_t alpha) : AliKalmanTrack()
174 ,fkReconstructor(NULL)
180 // The stand alone tracking constructor
181 // TEMPORARY !!!!!!!!!!!
183 // 1. covariance matrix
184 // 2. dQdl calculation
188 Double_t cnv = (TMath::Abs(b) < 1.e-5) ? 1.e5 : 1./GetBz()/kB2C;
190 Double_t pp[5] = { p[0]
196 Double_t c22 = x*x*cov[14] - 2*x*cov[12] + cov[ 5];
197 Double_t c32 = x*cov[13] - cov[ 8];
198 Double_t c20 = x*cov[10] - cov[ 3];
199 Double_t c21 = x*cov[11] - cov[ 4];
200 Double_t c42 = x*cov[14] - cov[12];
202 Double_t cc[15] = { cov[ 0]
205 , cov[ 6], cov[ 7], c32, cov[ 9]
206 , cov[10]*cnv, cov[11]*cnv, c42*cnv, cov[13]*cnv, cov[14]*cnv*cnv };
208 Double_t mostProbablePt=AliExternalTrackParam::GetMostProbablePt();
209 Double_t p0=TMath::Sign(1/mostProbablePt,pp[4]);
210 Double_t w0=cc[14]/(cc[14] + p0*p0), w1=p0*p0/(cc[14] + p0*p0);
211 AliDebug(3, Form("Pt mixing : w0[%4.2f] pt0[%5.3f] w1[%4.2f] pt[%5.3f]", w0, 1./p0, w1, 1./pp[4]));
213 pp[4] = w0*p0 + w1*pp[4];
214 cc[10]*=w1; cc[11]*=w1; cc[12]*=w1; cc[13]*=w1; cc[14]*=w1;
216 AliDebug(2, Form("Init @ x[%6.2f] pt[%5.3f]", x, 1./pp[4]));
218 for(int iplane=0; iplane<kNplane; iplane++){
219 fTrackletIndex[iplane] = -1;
220 if(!trklts[iplane].IsOK()) fTracklet[iplane] = NULL;
222 fTracklet[iplane] = &trklts[iplane];
223 ncls += fTracklet[iplane]->GetN();
226 AliKalmanTrack::SetNumberOfClusters(ncls);
227 for(int i =0; i<3; i++) fBudget[i] = 0.;
229 Float_t pid = 1./AliPID::kSPECIES;
230 for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
233 //_______________________________________________________________
234 AliTRDtrackV1::~AliTRDtrackV1()
236 // Clean up all objects allocated by the track during its lifetime.
237 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'));
239 if(fBackupTrack) delete fBackupTrack; fBackupTrack = NULL;
241 if(fTrackLow) delete fTrackLow; fTrackLow = NULL;
242 if(fTrackHigh) delete fTrackHigh; fTrackHigh = NULL;
244 for(Int_t ip=0; ip<kNplane; ip++){
245 if(TestBit(kOwner) && fTracklet[ip]) delete fTracklet[ip];
246 fTracklet[ip] = NULL;
247 fTrackletIndex[ip] = -1;
251 //_______________________________________________________________
252 AliTRDtrackV1 &AliTRDtrackV1::operator=(const AliTRDtrackV1 &t)
255 // Assignment operator
259 AliKalmanTrack::operator=(t);
260 ((AliTRDtrackV1 &) t).Copy(*this);
267 //_____________________________________________________________________________
268 void AliTRDtrackV1::Copy(TObject &t) const
274 ((AliTRDtrackV1 &) t).fStatus = fStatus;
275 ((AliTRDtrackV1 &) t).fESDid = fESDid;
276 ((AliTRDtrackV1 &) t).fDE = fDE;
277 ((AliTRDtrackV1 &) t).fkReconstructor = fkReconstructor;
278 ((AliTRDtrackV1 &) t).fBackupTrack = 0x0;
279 ((AliTRDtrackV1 &) t).fTrackLow = 0x0;
280 ((AliTRDtrackV1 &) t).fTrackHigh = 0x0;
282 for(Int_t ip = 0; ip < kNplane; ip++) {
283 ((AliTRDtrackV1 &) t).fTrackletIndex[ip] = fTrackletIndex[ip];
284 ((AliTRDtrackV1 &) t).fTracklet[ip] = fTracklet[ip];
287 ((AliTRDtrackV1 &) t).fTrackLow = new AliExternalTrackParam(*fTrackLow);
290 ((AliTRDtrackV1 &) t).fTrackHigh = new AliExternalTrackParam(*fTrackHigh);
293 for (Int_t i = 0; i < 3; i++) {
294 ((AliTRDtrackV1 &) t).fBudget[i] = fBudget[i];
296 for (Int_t is = 0; is < AliPID::kSPECIES; is++) {
297 ((AliTRDtrackV1 &) t).fPID[is] = fPID[is];
302 //_______________________________________________________________
303 Int_t AliTRDtrackV1::CookLabel(Float_t wrong, Int_t *labs, Float_t *freq)
305 // Set MC label for this track
306 // On demand i.e. if arrays "labs" and "freq" are allocated by user returns :
307 // nlabs = the no of distinct labels
308 // labs = array of distinct labels in decreasing order of frequency
309 // freq = frequency of each label in decreasing order
312 if(!(ncl = GetNumberOfClusters())) return 0;
314 Int_t s[2][kMAXCLUSTERSPERTRACK];
315 for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
320 Int_t label(-123456789), nlabels(0);
321 AliTRDcluster *c(NULL);
322 for (Int_t ip(0); ip < AliTRDgeometry::kNlayer; ip++) {
323 if(fTrackletIndex[ip]<0 || !fTracklet[ip]) continue;
324 for (Int_t ic(0); ic < AliTRDseedV1::kNclusters; ic++) {
325 if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
326 for (Int_t k(0); k < 3; k++) {
327 if ((label = c->GetLabel(k)) < 0) continue;
329 while(j < kMAXCLUSTERSPERTRACK){
330 if(s[0][j]!=label && s[1][j]!=0){j++; continue;}
331 if(!s[1][j]) nlabels++;
332 s[0][j] = label; s[1][j]++;
338 //printf(" Found %4d labels\n", nlabels);
341 AliError(Form("No MC labels found for track %d.", fESDid));
343 } else if(nlabels==1) {
345 if(labs && freq){labs[0]=label; freq[0]=1.;}
347 Int_t idx[kMAXCLUSTERSPERTRACK];
348 TMath::Sort(nlabels, s[1], idx);
349 label = s[0][idx[0]]; prob = s[1][idx[0]]/Float_t(ncl);
351 for (Int_t i(0); i<nlabels; i++){
352 labs[i] = s[0][idx[i]];
353 freq[i] = s[1][idx[i]]/Float_t(ncl);
357 SetLabel((1.-prob > wrong)?-label:label);
361 //_______________________________________________________________
362 Bool_t AliTRDtrackV1::CookPID()
365 // Cook the PID information for the track by delegating the omonim function of the tracklets.
366 // Computes the number of tracklets used. The tracklet information are considered independent.
367 // For the moment no global track measurement of PID is performed as for example to estimate
368 // bremsstrahlung probability based on global chi2 of the track.
370 // The status bit AliESDtrack::kTRDpid is set during the call of AliTRDtrackV1::UpdateESDtrack().The PID performance of the
371 //TRD for tracks with 6 tacklets is displayed below.
373 //<img src="TRD/trackPID.gif">
376 const AliTRDPIDResponse *pidResponse = AliTRDcalibDB::Instance()->GetPIDResponse(fkReconstructor->GetRecoParam()->GetPIDmethod());
378 AliError("PID Response not available");
381 Int_t nslices = pidResponse->GetNumberOfSlices();
382 Double_t dEdx[kNplane * (Int_t)AliTRDPIDResponse::kNslicesNN];
383 Float_t trackletP[kNplane];
384 memset(dEdx, 0, sizeof(Double_t) * kNplane * (Int_t)AliTRDPIDResponse::kNslicesNN);
385 memset(trackletP, 0, sizeof(Float_t)*kNplane);
386 for(Int_t iseed = 0; iseed < kNplane; iseed++){
387 if(!fTracklet[iseed]) continue;
388 trackletP[iseed] = fTracklet[iseed]->GetMomentum();
389 fTracklet[iseed]->SetPID();
390 if(pidResponse->GetPIDmethod() == AliTRDPIDResponse::kLQ1D){
391 dEdx[iseed] = fTracklet[iseed]->GetdQdl();
393 fTracklet[iseed]->CookdEdx(nslices);
394 const Float_t *trackletdEdx = fTracklet[iseed]->GetdEdx();
395 for(Int_t islice = 0; islice < nslices; islice++){
396 dEdx[iseed*nslices + islice] = trackletdEdx[islice];
400 pidResponse->GetResponse(nslices, dEdx, trackletP, fPID);
402 static Int_t nprint = 0;
404 AliTRDdEdxBaseUtils::PrintControl();
409 AliTRDdEdxCalibUtils::SetObjArray(AliTRDcalibDB::Instance()->GetPHQ());
410 const Double_t mag = AliTRDdEdxBaseUtils::IsExBOn() ? GetBz() : -1;
411 const Double_t charge = AliTRDdEdxBaseUtils::IsExBOn() ? Charge() : -1;
412 fTruncatedMean = CookTruncatedMean(0, mag, charge, kTRUE, fNchamberdEdx, fNclusterdEdx);
417 //___________________________________________________________
418 UChar_t AliTRDtrackV1::GetNumberOfTrackletsPID() const
420 // Retrieve number of tracklets used for PID calculation.
423 for(int ip=0; ip<kNplane; ip++){
424 if(fTrackletIndex[ip]<0 || !fTracklet[ip]) continue;
425 if(!fTracklet[ip]->IsOK()) continue;
432 //_______________________________________________________________
433 AliTRDcluster* AliTRDtrackV1::GetCluster(Int_t id)
435 // Get the cluster at a certain position in the track
437 for(Int_t ip=0; ip<kNplane; ip++){
438 if(!fTracklet[ip]) continue;
439 if(n+fTracklet[ip]->GetN() <= id){
440 n+=fTracklet[ip]->GetN();
443 AliTRDcluster *c = NULL;
444 for(Int_t ic=AliTRDseedV1::kNclusters; ic--;){
445 if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
447 if(n<id){n++; continue;}
454 //_______________________________________________________________
455 Int_t AliTRDtrackV1::GetClusterIndex(Int_t id) const
457 // Get the cluster index at a certain position in the track
459 for(Int_t ip=0; ip<kNplane; ip++){
460 if(!fTracklet[ip]) continue;
461 if(n+fTracklet[ip]->GetN() <= id){
462 n+=fTracklet[ip]->GetN();
465 for(Int_t ic=AliTRDseedV1::kNclusters; ic--;){
466 if(!(fTracklet[ip]->GetClusters(ic))) continue;
467 if(n<id){n++; continue;}
468 return fTracklet[ip]->GetIndexes(ic);
474 //_______________________________________________________________
475 Double_t AliTRDtrackV1::GetPredictedChi2(const AliTRDseedV1 *trklt, Double_t *cov) const
477 // Compute chi2 between tracklet and track. The value is calculated at the radial position of the track
478 // equal to the reference radial position of the tracklet (see AliTRDseedV1)
480 // The chi2 estimator is computed according to the following formula
482 // #chi^{2}=(X_{trklt}-X_{track})(C_{trklt}+C_{track})^{-1}(X_{trklt}-X_{track})^{T}
484 // where X=(y z), the position of the track/tracklet in the yz plane
487 Double_t p[2] = { trklt->GetY(), trklt->GetZ()};
488 trklt->GetCovAt(trklt->GetX(), cov);
489 return AliExternalTrackParam::GetPredictedChi2(p, cov);
492 //_______________________________________________________________
493 Int_t AliTRDtrackV1::GetSector() const
495 return Int_t(GetAlpha()/AliTRDgeometry::GetAlpha() + (GetAlpha()>0. ? 0 : AliTRDgeometry::kNsector));
498 //_______________________________________________________________
499 Bool_t AliTRDtrackV1::IsEqual(const TObject *o) const
501 // Checks whether two tracks are equal
502 if (!o) return kFALSE;
503 const AliTRDtrackV1 *inTrack = dynamic_cast<const AliTRDtrackV1*>(o);
504 if (!inTrack) return kFALSE;
506 //if ( fPIDquality != inTrack->GetPIDquality() ) return kFALSE;
508 if(memcmp(fPID, inTrack->fPID, AliPID::kSPECIES*sizeof(Double32_t))) return kFALSE;
509 if(memcmp(fBudget, inTrack->fBudget, 3*sizeof(Double32_t))) return kFALSE;
510 if(memcmp(&fDE, &inTrack->fDE, sizeof(Double32_t))) return kFALSE;
511 if(memcmp(&fFakeRatio, &inTrack->fFakeRatio, sizeof(Double32_t))) return kFALSE;
512 if(memcmp(&fChi2, &inTrack->fChi2, sizeof(Double32_t))) return kFALSE;
513 if(memcmp(&fMass, &inTrack->fMass, sizeof(Double32_t))) return kFALSE;
514 if( fLab != inTrack->fLab ) return kFALSE;
515 if( fN != inTrack->fN ) return kFALSE;
516 Double32_t l(0.), in(0.);
517 l = GetIntegratedLength(); in = inTrack->GetIntegratedLength();
518 if(memcmp(&l, &in, sizeof(Double32_t))) return kFALSE;
519 l=GetX(); in=inTrack->GetX();
520 if(memcmp(&l, &in, sizeof(Double32_t))) return kFALSE;
521 l = GetAlpha(); in = inTrack->GetAlpha();
522 if(memcmp(&l, &in, sizeof(Double32_t))) return kFALSE;
523 if(memcmp(GetParameter(), inTrack->GetParameter(), 5*sizeof(Double32_t))) return kFALSE;
524 if(memcmp(GetCovariance(), inTrack->GetCovariance(), 15*sizeof(Double32_t))) return kFALSE;
526 for (Int_t iTracklet = 0; iTracklet < kNplane; iTracklet++){
527 AliTRDseedV1 *curTracklet = fTracklet[iTracklet];
528 AliTRDseedV1 *inTracklet = inTrack->GetTracklet(iTracklet);
529 if (curTracklet && inTracklet){
530 if (! curTracklet->IsEqual(inTracklet) ) {
531 curTracklet->Print();
536 // if one tracklet exists, and corresponding
537 // in other track doesn't - return kFALSE
538 if(inTracklet || curTracklet) return kFALSE;
545 //_______________________________________________________________
546 Bool_t AliTRDtrackV1::IsElectron() const
548 if(GetPID(0) > fkReconstructor->GetRecoParam()->GetPIDThreshold(GetP())) return kTRUE;
553 //_____________________________________________________________________________
554 Int_t AliTRDtrackV1::MakeBackupTrack()
557 // Creates a backup track
558 // TO DO update quality check of the track.
561 Float_t occupancy(0.); Int_t n(0), ncls(0);
562 for(Int_t il(AliTRDgeometry::kNlayer); il--;){
563 if(!fTracklet[il]) continue;
565 occupancy+=fTracklet[il]->GetTBoccupancy()/AliTRDseedV1::kNtb;
566 ncls += fTracklet[il]->GetN();
571 //Float_t ratio1 = Float_t(t.GetNumberOfClusters()+1) / Float_t(t.GetNExpected()+1);
573 Int_t failedCutId(0);
574 if(GetChi2()/n > 5.0) failedCutId=1;
575 if(occupancy < 0.7) failedCutId=2;
576 //if(ratio1 > 0.6) &&
577 //if(ratio0+ratio1 > 1.5) &&
578 if(GetNCross() != 0) failedCutId=3;
579 if(TMath::Abs(GetSnp()) > 0.85) failedCutId=4;
580 if(ncls < 20) failedCutId=5;
583 AliDebug(2, Form("\n"
584 "chi2/tracklet < 5.0 [%c] %5.2f\n"
585 "occupancy > 0.7 [%c] %4.2f\n"
586 "NCross == 0 [%c] %d\n"
587 "Abs(snp) < 0.85 [%c] %4.2f\n"
588 "NClusters > 20 [%c] %d"
589 ,(GetChi2()/n<5.0)?'y':'n', GetChi2()/n
590 ,(occupancy>0.7)?'y':'n', occupancy
591 ,(GetNCross()==0)?'y':'n', GetNCross()
592 ,(TMath::Abs(GetSnp())<0.85)?'y':'n', TMath::Abs(GetSnp())
593 ,(ncls>20)?'y':'n', ncls
599 fBackupTrack->~AliTRDtrackV1();
600 new(fBackupTrack) AliTRDtrackV1((AliTRDtrackV1&)(*this));
603 fBackupTrack = new AliTRDtrackV1((AliTRDtrackV1&)(*this));
607 //_____________________________________________________________________________
608 Int_t AliTRDtrackV1::GetProlongation(Double_t xk, Double_t &y, Double_t &z) const
611 // Find a prolongation at given x
612 // Return -1 if it does not exist
615 Double_t bz = GetBz();
616 if (!AliExternalTrackParam::GetYAt(xk,bz,y)) return -1;
617 if (!AliExternalTrackParam::GetZAt(xk,bz,z)) return -1;
623 //_____________________________________________________________________________
624 Bool_t AliTRDtrackV1::PropagateTo(Double_t xk, Double_t xx0, Double_t xrho)
627 // Propagates this track to a reference plane defined by "xk" [cm]
628 // correcting for the mean crossed material.
630 // "xx0" - thickness/rad.length [units of the radiation length]
631 // "xrho" - thickness*density [g/cm^2]
634 if (TMath::Abs(xk - GetX())<AliTRDReconstructor::GetEpsilon()*0.1) return kTRUE; // 10% of the tracker precision
636 Double_t xyz0[3] = {GetX(), GetY(), GetZ()}, // track position BEFORE propagation
637 b[3]; // magnetic field
639 if(!AliExternalTrackParam::PropagateToBxByBz(xk,b)) return kFALSE;
641 // local track position AFTER propagation
642 Double_t xyz1[3] = {GetX(), GetY(), GetZ()};
643 // 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));
646 if (IsStartedTimeIntegral()) {
647 Double_t l2 = TMath::Sqrt((xyz1[0]-xyz0[0])*(xyz1[0]-xyz0[0])
648 + (xyz1[1]-xyz0[1])*(xyz1[1]-xyz0[1])
649 + (xyz1[2]-xyz0[2])*(xyz1[2]-xyz0[2]));
650 Double_t crv = AliExternalTrackParam::GetC(b[2]);
651 if (TMath::Abs(l2*crv) > 0.0001) {
652 // Make correction for curvature if neccesary
653 l2 = 0.5 * TMath::Sqrt((xyz1[0]-xyz0[0])*(xyz1[0]-xyz0[0])
654 + (xyz1[1]-xyz0[1])*(xyz1[1]-xyz0[1]));
655 l2 = 2.0 * TMath::ASin(l2 * crv) / crv;
656 l2 = TMath::Sqrt(l2*l2 + (xyz1[2]-xyz0[2])*(xyz1[2]-xyz0[2]));
661 if (!AliExternalTrackParam::CorrectForMeanMaterial(xx0, xrho, fMass)) return kFALSE;
667 Double_t p2 = (1.0 + GetTgl()*GetTgl()) / (GetSigned1Pt()*GetSigned1Pt());
668 Double_t beta2 = p2 / (p2 + fMass*fMass);
669 if ((beta2 < 1.0e-10) ||
670 ((5940.0 * beta2/(1.0 - beta2 + 1.0e-10) - beta2) < 0.0)) {
674 Double_t dE = 0.153e-3 / beta2
675 * (TMath::Log(5940.0 * beta2/(1.0 - beta2 + 1.0e-10)) - beta2)
680 // Suspicious part - think about it ?
681 Double_t kinE = TMath::Sqrt(p2);
682 if (dE > 0.8*kinE) dE = 0.8 * kinE; //
683 if (dE < 0) dE = 0.0; // Not valid region for Bethe bloch
690 Double_t sigmade = 0.07 * TMath::Sqrt(TMath::Abs(dE)); // Energy loss fluctuation
691 Double_t sigmac2 = sigmade*sigmade*fC*fC*(p2+fMass*fMass)/(p2*p2);
693 fCee += fX*fX * sigmac2;
701 //_____________________________________________________________________________
702 Int_t AliTRDtrackV1::PropagateToR(Double_t r,Double_t step)
705 // Propagate track to the radial position
706 // Rotation always connected to the last track position
714 Double_t radius = TMath::Sqrt(GetX()*GetX() + GetY()*GetY());
716 Double_t dir = (radius > r) ? -1.0 : 1.0;
718 for (Double_t x = radius+dir*step; dir*x < dir*r; x += dir*step) {
721 Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
724 if(GetProlongation(x,y,z)<0) return -1;
725 xyz1[0] = x * TMath::Cos(alpha) + y * TMath::Sin(alpha);
726 xyz1[1] = x * TMath::Sin(alpha) - y * TMath::Cos(alpha);
729 if(AliTracker::MeanMaterialBudget(xyz0,xyz1,param)<=0.) return -1;
731 param[1] = 100000000;
733 PropagateTo(x,param[1],param[0]*param[4]);
738 Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
741 if(GetProlongation(r,y,z)<0) return -1;
742 xyz1[0] = r * TMath::Cos(alpha) + y * TMath::Sin(alpha);
743 xyz1[1] = r * TMath::Sin(alpha) - y * TMath::Cos(alpha);
746 if(AliTracker::MeanMaterialBudget(xyz0,xyz1,param) <= 0.) return -1;
749 param[1] = 100000000;
751 PropagateTo(r,param[1],param[0]*param[4]);
757 //_____________________________________________________________________________
758 void AliTRDtrackV1::Print(Option_t *o) const
760 // Print track status
761 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]));
762 AliInfo(Form("Material[%5.2f %5.2f %5.2f]", fBudget[0], fBudget[1], fBudget[2]));
764 AliInfo(Form("x[%7.2f] t[%7.4f] alpha[%f] mass[%f]", GetX(), GetIntegratedLength(), GetAlpha(), fMass));
765 AliInfo(Form("Ntr[%1d] NtrPID[%1d] Ncl[%3d] lab[%3d]", GetNumberOfTracklets(), GetNumberOfTrackletsPID(), fN, fLab));
768 const Double_t *curP = GetParameter();
769 for (Int_t i = 0; i < 5; i++) printf("%7.2f ", curP[i]);
773 const Double_t *curC = GetCovariance();
774 for (Int_t i = 0, j=4, k=0; i<15; i++, k++){
775 printf("%7.2f ", curC[i]);
781 if(strcmp(o, "a")!=0) return;
783 for(Int_t ip=0; ip<kNplane; ip++){
784 if(!fTracklet[ip]) continue;
785 fTracklet[ip]->Print(o);
790 //_____________________________________________________________________________
791 Bool_t AliTRDtrackV1::Rotate(Double_t alpha, Bool_t absolute)
794 // Rotates track parameters in R*phi plane
795 // if absolute rotation alpha is in global system
796 // otherwise alpha rotation is relative to the current rotation angle
799 if (absolute) alpha -= GetAlpha();
802 return AliExternalTrackParam::Rotate(GetAlpha()+alpha);
805 //___________________________________________________________
806 void AliTRDtrackV1::SetNumberOfClusters()
808 // Calculate the number of clusters attached to this track
811 for(int ip=0; ip<kNplane; ip++){
812 if(fTracklet[ip] && fTrackletIndex[ip] >= 0) ncls += fTracklet[ip]->GetN();
814 AliKalmanTrack::SetNumberOfClusters(ncls);
818 //_______________________________________________________________
819 void AliTRDtrackV1::SetOwner()
822 // Toggle ownership of tracklets
825 if(TestBit(kOwner)) return;
826 for (Int_t ip = 0; ip < kNplane; ip++) {
827 if(fTrackletIndex[ip]<0 || !fTracklet[ip]) continue;
828 fTracklet[ip] = new AliTRDseedV1(*fTracklet[ip]);
829 fTracklet[ip]->SetOwner();
834 //_______________________________________________________________
835 void AliTRDtrackV1::SetTracklet(AliTRDseedV1 *const trklt, Int_t index)
840 Int_t plane = trklt->GetPlane();
842 fTracklet[plane] = trklt;
843 fTrackletIndex[plane] = index;
846 //_______________________________________________________________
847 void AliTRDtrackV1::SetTrackIn()
849 // Save location of birth for the TRD track
850 // If the pointer is not valid allocate memory
852 const AliExternalTrackParam *op = dynamic_cast<const AliExternalTrackParam*>(this);
854 //printf("SetTrackIn() : fTrackLow[%p]\n", (void*)fTrackLow);
856 fTrackLow->~AliExternalTrackParam();
857 new(fTrackLow) AliExternalTrackParam(*op);
858 } else fTrackLow = new AliExternalTrackParam(*op);
861 //_______________________________________________________________
862 void AliTRDtrackV1::SetTrackOut(const AliExternalTrackParam *op)
864 // Save location of death for the TRD track
865 // If the pointer is not valid allocate memory
867 if(!op) op = dynamic_cast<const AliExternalTrackParam*>(this);
869 fTrackHigh->~AliExternalTrackParam();
870 new(fTrackHigh) AliExternalTrackParam(*op);
871 } else fTrackHigh = new AliExternalTrackParam(*op);
874 //_______________________________________________________________
875 void AliTRDtrackV1::UnsetTracklet(Int_t plane)
878 fTrackletIndex[plane] = -1;
879 fTracklet[plane] = NULL;
883 //_______________________________________________________________
884 void AliTRDtrackV1::UpdateChi2(Float_t chi2)
886 // Update chi2/track with one tracklet contribution
887 SetChi2(GetChi2() + chi2);
890 //_______________________________________________________________
891 void AliTRDtrackV1::UpdateESDtrack(AliESDtrack *track)
894 // Update the TRD PID information in the ESD track
897 // Int_t nslices = AliTRDcalibDB::Instance()->GetPIDResponse(fkReconstructor->GetRecoParam()->GetPIDmethod())->GetNumberOfSlices();
898 // number of tracklets used for PID calculation
899 UChar_t nPID = GetNumberOfTrackletsPID();
900 // number of tracklets attached to the track
901 UChar_t nTrk = GetNumberOfTracklets();
902 // pack the two numbers together and store them in the ESD
903 track->SetTRDntracklets(nPID | (nTrk<<3));
904 // allocate space to store raw PID signals dEdx & momentum
905 track->SetNumberOfTRDslices((AliTRDPIDResponse::kNslicesNN+3)*AliTRDgeometry::kNlayer);
907 Float_t p, sp; Double_t spd;
908 for (Int_t ip = 0; ip < kNplane; ip++) {
909 if(fTrackletIndex[ip]<0 || !fTracklet[ip]) continue;
910 if(!fTracklet[ip]->HasPID()) continue;
911 fTracklet[ip]->CookdEdx(AliTRDPIDResponse::kNslicesNN);
912 const Float_t *dedx = fTracklet[ip]->GetdEdx();
913 for (Int_t js = 0; js < AliTRDPIDResponse::kNslicesNN; js++, dedx++){
914 track->SetTRDslice(*dedx, ip, js+1);
916 p = fTracklet[ip]->GetMomentum(&sp);
917 spd = sp; track->SetTRDmomentum(p, ip, &spd);
918 // store global quality per tracklet instead of momentum error
919 // 26.09.11 A.Bercuci
920 // first implementation store no. of time bins filled in tracklet (5bits see "y" bits) and
921 // no. of double clusters in case of pad row cross (4bits see "x" bits)
922 // bit map for tracklet quality xxxxyyyyy
923 // 27.10.11 A.Bercuci
924 // add chamber status bit "z" bit
925 // bit map for tracklet quality zxxxxyyyyy
926 // 12.11.11 A.Bercuci
927 // fit tracklet quality into the field fTRDTimeBin [Char_t]
928 // bit map for tracklet quality zxxyyyyy
929 // The information should be retrieved by the following functions of AliESDtrack for each TRD layer
930 // GetTRDtrkltOccupancy(layer) -> no of TB filled in tracklet
931 // GetTRDtrkltClCross(layer) -> no of TB filled in crossing pad rows
932 // IsTRDtrkltChmbGood(layer) -> status of the chamber from which the tracklet is found
933 Int_t nCross(fTracklet[ip]->IsRowCross()?fTracklet[ip]->GetTBcross():0); if(nCross>3) nCross = 3;
934 Char_t trackletQ = Char_t(fTracklet[ip]->GetTBoccupancy() | (nCross<<5) | (fTracklet[ip]->IsChmbGood()<<7));
935 track->SetTRDTimBin(trackletQ, ip);
936 track->SetTRDslice(fTracklet[ip]->GetdQdl(), ip, 0); // Set Summed dEdx into the first slice
938 // store PID probabilities
939 track->SetTRDpid(fPID);
941 //store truncated mean
942 track->SetTRDsignal(fTruncatedMean);
943 track->SetTRDNchamberdEdx(fNchamberdEdx);
944 track->SetTRDNclusterdEdx(fNclusterdEdx);
947 //_______________________________________________________________
948 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
951 //Origin: Xianguo Lu <xianguo.lu@cern.ch>, Marian Ivanov <marian.ivanov@cern.ch>
954 TVectorD arrayQ(200), arrayX(200);
955 ncls = AliTRDdEdxReconUtils::GetArrayClusterQ(kinvq, &arrayQ, &arrayX, this, timeBin0, timeBin1, tstep);
957 const TObjArray *cobj = kcalib ? AliTRDdEdxCalibUtils::GetObj(kinvq, mag, charge) : NULL;
959 const Double_t tmean = AliTRDdEdxReconUtils::ToyCook(kinvq, ncls, &arrayQ, &arrayX, cobj);
961 nch = AliTRDdEdxReconUtils::UpdateArrayX(ncls, &arrayX);
968 //printf("\ntest %.10f %d %d\n", tmean, nch, ncls);