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 *
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12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
19 //-----------------------------------------------------------------
20 // Implementation of the TPC seed class
21 // This class is used by the AliTPCtrackerMI class
22 // Origin: Marian Ivanov, CERN, Marian.Ivanov@cern.ch
23 //-----------------------------------------------------------------
24 #include "TClonesArray.h"
25 #include "AliTPCseed.h"
26 #include "AliTPCReconstructor.h"
27 #include "AliTPCClusterParam.h"
28 #include "AliTPCCalPad.h"
29 #include "AliTPCCalROC.h"
30 #include "AliTPCcalibDB.h"
31 #include "AliTPCParam.h"
39 AliTPCseed::AliTPCseed():
42 fClusterOwner(kFALSE),
46 fCurrentSigmaY2(1e10),
47 fCurrentSigmaZ2(1e10),
48 fCMeanSigmaY2p30(-1.), //! current mean sigma Y2 - mean30%
49 fCMeanSigmaZ2p30(-1.), //! current mean sigma Z2 - mean30%
50 fCMeanSigmaY2p30R(-1.), //! current mean sigma Y2 - mean2%
51 fCMeanSigmaZ2p30R(-1.), //! current mean sigma Z2 - mean2%
56 fCurrentClusterIndex1(-1),
71 for (Int_t i=0;i<160;i++) SetClusterIndex2(i,-3);
72 for (Int_t i=0;i<160;i++) fClusterPointer[i]=0;
73 for (Int_t i=0;i<3;i++) fKinkIndexes[i]=0;
74 for (Int_t i=0;i<AliPID::kSPECIES;i++) fTPCr[i]=0.2;
75 for (Int_t i=0;i<4;i++) {
80 for (Int_t i=0;i<12;i++) fOverlapLabels[i] = -1;
81 // for (Int_t i=0;i<160;i++) fClusterMap[i]=kFALSE;
82 //for (Int_t i=0;i<160;i++) fSharedMap[i]=kFALSE;
83 fClusterMap.ResetAllBits(kFALSE);
84 fSharedMap.ResetAllBits(kFALSE);
88 AliTPCseed::AliTPCseed(const AliTPCseed &s, Bool_t clusterOwner):
91 fClusterOwner(clusterOwner),
97 fCMeanSigmaY2p30(-1.), //! current mean sigma Y2 - mean30%
98 fCMeanSigmaZ2p30(-1.), //! current mean sigma Z2 - mean30%
99 fCMeanSigmaY2p30R(-1.), //! current mean sigma Y2 - mean2%
100 fCMeanSigmaZ2p30R(-1.), //! current mean sigma Z2 - mean2%
103 fCurrentCluster(0x0),
104 fCurrentClusterIndex1(-1),
115 fClusterMap(s.fClusterMap),
116 fSharedMap(s.fSharedMap)
118 //---------------------
119 // dummy copy constructor
120 //-------------------------
121 for (Int_t i=0;i<160;i++) {
122 fClusterPointer[i]=0;
124 if (s.fClusterPointer[i])
125 fClusterPointer[i] = new AliTPCclusterMI(*(s.fClusterPointer[i]));
127 fClusterPointer[i] = s.fClusterPointer[i];
129 fTrackPoints[i] = s.fTrackPoints[i];
131 for (Int_t i=0;i<160;i++) fIndex[i] = s.fIndex[i];
132 for (Int_t i=0;i<AliPID::kSPECIES;i++) fTPCr[i]=s.fTPCr[i];
133 for (Int_t i=0;i<4;i++) {
134 fDEDX[i] = s.fDEDX[i];
135 fSDEDX[i] = s.fSDEDX[i];
136 fNCDEDX[i] = s.fNCDEDX[i];
138 for (Int_t i=0;i<12;i++) fOverlapLabels[i] = s.fOverlapLabels[i];
143 AliTPCseed::AliTPCseed(const AliTPCtrack &t):
146 fClusterOwner(kFALSE),
152 fCMeanSigmaY2p30(-1.), //! current mean sigma Y2 - mean30%
153 fCMeanSigmaZ2p30(-1.), //! current mean sigma Z2 - mean30%
154 fCMeanSigmaY2p30R(-1.), //! current mean sigma Y2 - mean2%
155 fCMeanSigmaZ2p30R(-1.), //! current mean sigma Z2 - mean2%
158 fCurrentCluster(0x0),
159 fCurrentClusterIndex1(-1),
174 // Constructor from AliTPCtrack
177 for (Int_t i=0;i<5;i++) fTPCr[i]=0.2;
178 for (Int_t i=0;i<160;i++) {
179 fClusterPointer[i] = 0;
180 Int_t index = t.GetClusterIndex(i);
182 SetClusterIndex2(i,index);
185 SetClusterIndex2(i,-3);
188 for (Int_t i=0;i<4;i++) {
193 for (Int_t i=0;i<12;i++) fOverlapLabels[i] = -1;
195 //for (Int_t i=0;i<160;i++) fClusterMap[i]=kFALSE;
196 //for (Int_t i=0;i<160;i++) fSharedMap[i]=kFALSE;
197 fClusterMap.ResetAllBits(kFALSE);
198 fSharedMap.ResetAllBits(kFALSE);
202 AliTPCseed::AliTPCseed(Double_t xr, Double_t alpha, const Double_t xx[5],
203 const Double_t cc[15], Int_t index):
204 AliTPCtrack(xr, alpha, xx, cc, index),
206 fClusterOwner(kFALSE),
212 fCMeanSigmaY2p30(-1.), //! current mean sigma Y2 - mean30%
213 fCMeanSigmaZ2p30(-1.), //! current mean sigma Z2 - mean30%
214 fCMeanSigmaY2p30R(-1.), //! current mean sigma Y2 - mean2%
215 fCMeanSigmaZ2p30R(-1.), //! current mean sigma Z2 - mean2%
218 fCurrentCluster(0x0),
219 fCurrentClusterIndex1(-1),
237 for (Int_t i=0;i<160;i++) SetClusterIndex2(i,-3);
238 for (Int_t i=0;i<160;i++) fClusterPointer[i]=0;
239 for (Int_t i=0;i<5;i++) fTPCr[i]=0.2;
240 for (Int_t i=0;i<4;i++) {
245 for (Int_t i=0;i<12;i++) fOverlapLabels[i] = -1;
248 AliTPCseed::~AliTPCseed(){
253 for (Int_t icluster=0; icluster<160; icluster++){
254 delete fClusterPointer[icluster];
259 //_________________________________________________
260 AliTPCseed & AliTPCseed::operator=(const AliTPCseed ¶m)
263 // assignment operator
266 AliTPCtrack::operator=(param);
268 for(Int_t i = 0;i<160;++i)fClusterPointer[i] = param.fClusterPointer[i]; // this is not allocated by AliTPCSeed
269 fClusterOwner = param.fClusterOwner;
270 // leave out fPoint, they are also not copied in the copy ctor...
271 // but deleted in the dtor... strange...
273 fSector = param.fSector;
274 fRelativeSector = param.fRelativeSector;
275 fCurrentSigmaY2 = param.fCurrentSigmaY2;
276 fCurrentSigmaZ2 = param.fCurrentSigmaZ2;
277 fErrorY2 = param.fErrorY2;
278 fErrorZ2 = param.fErrorZ2;
279 fCurrentCluster = param.fCurrentCluster; // this is not allocated by AliTPCSeed
280 fCurrentClusterIndex1 = param.fCurrentClusterIndex1;
281 fInDead = param.fInDead;
282 fIsSeeding = param.fIsSeeding;
283 fNoCluster = param.fNoCluster;
285 fBSigned = param.fBSigned;
286 for(Int_t i = 0;i<4;++i){
287 fDEDX[i] = param.fDEDX[i];
288 fSDEDX[i] = param.fSDEDX[i];
289 fNCDEDX[i] = param.fNCDEDX[i];
291 for(Int_t i = 0;i<AliPID::kSPECIES;++i)fTPCr[i] = param.fTPCr[i];
293 fSeedType = param.fSeedType;
294 fSeed1 = param.fSeed1;
295 fSeed2 = param.fSeed2;
296 for(Int_t i = 0;i<12;++i)fOverlapLabels[i] = param.fOverlapLabels[i];
297 fMAngular = param.fMAngular;
298 fCircular = param.fCircular;
299 for(int i = 0;i<160;++i)fTrackPoints[i] = param.fTrackPoints[i];
300 fClusterMap = param.fClusterMap;
301 fSharedMap = param.fSharedMap;
305 //____________________________________________________
306 AliTPCTrackerPoint * AliTPCseed::GetTrackPoint(Int_t i)
310 return &fTrackPoints[i];
315 Double_t AliTPCseed::GetDensityFirst(Int_t n)
319 // return cluster for n rows bellow first point
320 Int_t nfoundable = 1;
322 for (Int_t i=fLastPoint-1;i>0&&nfoundable<n; i--){
323 Int_t index = GetClusterIndex2(i);
324 if (index!=-1) nfoundable++;
325 if (index>0) nfound++;
327 if (nfoundable<n) return 0;
328 return Double_t(nfound)/Double_t(nfoundable);
333 void AliTPCseed::GetClusterStatistic(Int_t first, Int_t last, Int_t &found, Int_t &foundable, Int_t &shared, Bool_t plus2)
335 // get cluster stat. on given region
340 for (Int_t i=first;i<last; i++){
341 Int_t index = GetClusterIndex2(i);
342 if (index!=-1) foundable++;
343 if (index&0x8000) continue;
344 if (fClusterPointer[i]) {
350 if (fClusterPointer[i]->IsUsed(10)) {
354 if (!plus2) continue; //take also neighborhoud
356 if ( (i>0) && fClusterPointer[i-1]){
357 if (fClusterPointer[i-1]->IsUsed(10)) {
362 if ( fClusterPointer[i+1]){
363 if (fClusterPointer[i+1]->IsUsed(10)) {
371 //Error("AliTPCseed::GetClusterStatistic","problem\n");
379 void AliTPCseed::Reset(Bool_t all)
383 SetNumberOfClusters(0);
386 ResetCovariance(10.);
389 for (Int_t i=0;i<8;i++){
390 delete [] fTrackPoints[i];
398 for (Int_t i=0;i<200;i++) SetClusterIndex2(i,-3);
399 for (Int_t i=0;i<160;i++) fClusterPointer[i]=0;
405 void AliTPCseed::Modify(Double_t factor)
408 //------------------------------------------------------------------
409 //This function makes a track forget its history :)
410 //------------------------------------------------------------------
412 ResetCovariance(10.);
415 ResetCovariance(factor);
417 SetNumberOfClusters(0);
421 fCurrentSigmaY2 = 0.000005;
422 fCurrentSigmaZ2 = 0.000005;
431 Int_t AliTPCseed::GetProlongation(Double_t xk, Double_t &y, Double_t & z) const
433 //-----------------------------------------------------------------
434 // This function find proloncation of a track to a reference plane x=xk.
435 // doesn't change internal state of the track
436 //-----------------------------------------------------------------
438 Double_t x1=GetX(), x2=x1+(xk-x1), dx=x2-x1;
440 if (TMath::Abs(GetSnp()+GetC()*dx) >= AliTPCReconstructor::GetMaxSnpTrack()) {
444 // Double_t y1=fP0, z1=fP1;
445 Double_t c1=GetSnp(), r1=sqrt((1.-c1)*(1.+c1));
446 Double_t c2=c1 + GetC()*dx, r2=sqrt((1.-c2)*(1.+c2));
450 //y += dx*(c1+c2)/(r1+r2);
451 //z += dx*(c1+c2)/(c1*r2 + c2*r1)*fP3;
453 Double_t dy = dx*(c1+c2)/(r1+r2);
456 Double_t delta = GetC()*dx*(c1+c2)/(c1*r2 + c2*r1);
458 if (TMath::Abs(delta)>0.0001){
459 dz = fP3*TMath::ASin(delta)/fP4;
461 dz = dx*fP3*(c1+c2)/(c1*r2 + c2*r1);
464 // dz = fP3*AliTPCFastMath::FastAsin(delta)/fP4;
465 dz = GetTgl()*TMath::ASin(delta)/GetC();
475 //_____________________________________________________________________________
476 Double_t AliTPCseed::GetPredictedChi2(const AliCluster *c) const
478 //-----------------------------------------------------------------
479 // This function calculates a predicted chi2 increment.
480 //-----------------------------------------------------------------
481 Double_t p[2]={c->GetY(), c->GetZ()};
482 Double_t cov[3]={fErrorY2, 0., fErrorZ2};
483 return AliExternalTrackParam::GetPredictedChi2(p,cov);
486 //_________________________________________________________________________________________
489 Int_t AliTPCseed::Compare(const TObject *o) const {
490 //-----------------------------------------------------------------
491 // This function compares tracks according to the sector - for given sector according z
492 //-----------------------------------------------------------------
493 AliTPCseed *t=(AliTPCseed*)o;
496 if (t->fRelativeSector>fRelativeSector) return -1;
497 if (t->fRelativeSector<fRelativeSector) return 1;
498 Double_t z2 = t->GetZ();
499 Double_t z1 = GetZ();
501 if (z2<z1) return -1;
506 f2 = 1-20*TMath::Sqrt(t->GetSigma1Pt2())/(t->OneOverPt()+0.0066);
507 if (t->fBConstrain) f2=1.2;
510 f1 = 1-20*TMath::Sqrt(GetSigma1Pt2())/(OneOverPt()+0.0066);
512 if (fBConstrain) f1=1.2;
514 if (t->GetNumberOfClusters()*f2 <GetNumberOfClusters()*f1) return -1;
522 //_____________________________________________________________________________
523 Bool_t AliTPCseed::Update(const AliCluster *c, Double_t chisq, Int_t index)
525 //-----------------------------------------------------------------
526 // This function associates a cluster with this track.
527 //-----------------------------------------------------------------
528 Int_t n=GetNumberOfClusters();
529 Int_t idx=GetClusterIndex(n); // save the current cluster index
531 AliCluster cl(*c); cl.SetSigmaY2(fErrorY2); cl.SetSigmaZ2(fErrorZ2);
532 Float_t dx = ((AliTPCclusterMI*)c)->GetX()-GetX();
533 if (TMath::Abs(dx)>0){
534 Float_t ty = TMath::Tan(TMath::ASin(GetSnp()));
536 Float_t dz = dx*TMath::Sqrt(1.+ty*ty)*GetTgl();
537 cl.SetY(c->GetY()-dy);
538 cl.SetZ(c->GetZ()-dz);
541 if (!AliTPCtrack::Update(&cl,chisq,index)) return kFALSE;
543 if (fCMeanSigmaY2p30<0){
544 fCMeanSigmaY2p30= c->GetSigmaY2(); //! current mean sigma Y2 - mean30%
545 fCMeanSigmaZ2p30= c->GetSigmaZ2(); //! current mean sigma Z2 - mean30%
546 fCMeanSigmaY2p30R = 1; //! current mean sigma Y2 - mean5%
547 fCMeanSigmaZ2p30R = 1; //! current mean sigma Z2 - mean5%
550 fCMeanSigmaY2p30= 0.70*fCMeanSigmaY2p30 +0.30*c->GetSigmaY2();
551 fCMeanSigmaZ2p30= 0.70*fCMeanSigmaZ2p30 +0.30*c->GetSigmaZ2();
552 if (fCurrentSigmaY2>0){
553 fCMeanSigmaY2p30R = 0.7*fCMeanSigmaY2p30R +0.3*c->GetSigmaY2()/fCurrentSigmaY2;
554 fCMeanSigmaZ2p30R = 0.7*fCMeanSigmaZ2p30R +0.3*c->GetSigmaZ2()/fCurrentSigmaZ2;
558 SetClusterIndex(n,idx); // restore the current cluster index
564 //_____________________________________________________________________________
565 Float_t AliTPCseed::CookdEdx(Double_t low, Double_t up,Int_t i1, Int_t i2, Bool_t onlyused) {
566 //-----------------------------------------------------------------
567 // This funtion calculates dE/dX within the "low" and "up" cuts.
568 //-----------------------------------------------------------------
570 Float_t dedx = CookdEdxNorm(low,up,0,i1,i2,1,0,2);
574 // return CookdEdxNorm(low,up,0,i1,i2,1,0,2);
578 // Float_t angular[200];
579 // Float_t weight[200];
582 // Float_t meanlog = 100.;
584 // Float_t mean[4] = {0,0,0,0};
585 // Float_t sigma[4] = {1000,1000,1000,1000};
586 // Int_t nc[4] = {0,0,0,0};
587 // Float_t norm[4] = {1000,1000,1000,1000};
592 // Float_t gainGG = 1;
593 // if (AliTPCcalibDB::Instance()->GetParameters()){
594 // gainGG= AliTPCcalibDB::Instance()->GetParameters()->GetGasGain()/20000.; //relative gas gain
598 // for (Int_t of =0; of<4; of++){
599 // for (Int_t i=of+i1;i<i2;i+=4)
601 // Int_t clindex = fIndex[i];
602 // if (clindex<0||clindex&0x8000) continue;
604 // //AliTPCTrackPoint * point = (AliTPCTrackPoint *) arr.At(i);
605 // AliTPCTrackerPoint * point = GetTrackPoint(i);
606 // //AliTPCTrackerPoint * pointm = GetTrackPoint(i-1);
607 // //AliTPCTrackerPoint * pointp = 0;
608 // //if (i<159) pointp = GetTrackPoint(i+1);
610 // if (point==0) continue;
611 // AliTPCclusterMI * cl = fClusterPointer[i];
612 // if (cl==0) continue;
613 // if (onlyused && (!cl->IsUsed(10))) continue;
614 // if (cl->IsUsed(11)) {
618 // Int_t type = cl->GetType();
619 // //if (point->fIsShared){
624 // // if (pointm->fIsShared) continue;
626 // // if (pointp->fIsShared) continue;
628 // if (type<0) continue;
629 // //if (type>10) continue;
630 // //if (point->GetErrY()==0) continue;
631 // //if (point->GetErrZ()==0) continue;
633 // //Float_t ddy = (point->GetY()-cl->GetY())/point->GetErrY();
634 // //Float_t ddz = (point->GetZ()-cl->GetZ())/point->GetErrZ();
635 // //if ((ddy*ddy+ddz*ddz)>10) continue;
638 // // if (point->GetCPoint().GetMax()<5) continue;
639 // if (cl->GetMax()<5) continue;
640 // Float_t angley = point->GetAngleY();
641 // Float_t anglez = point->GetAngleZ();
643 // Float_t rsigmay2 = point->GetSigmaY();
644 // Float_t rsigmaz2 = point->GetSigmaZ();
648 // rsigmay += pointm->GetTPoint().GetSigmaY();
649 // rsigmaz += pointm->GetTPoint().GetSigmaZ();
653 // rsigmay += pointp->GetTPoint().GetSigmaY();
654 // rsigmaz += pointp->GetTPoint().GetSigmaZ();
661 // Float_t rsigma = TMath::Sqrt(rsigmay2*rsigmaz2);
663 // Float_t ampc = 0; // normalization to the number of electrons
665 // // ampc = 1.*point->GetCPoint().GetMax();
666 // ampc = 1.*cl->GetMax();
667 // //ampc = 1.*point->GetCPoint().GetQ();
668 // // AliTPCClusterPoint & p = point->GetCPoint();
669 // // Float_t dy = TMath::Abs(Int_t( TMath::Abs(p.GetY()/0.6)) - TMath::Abs(p.GetY()/0.6)+0.5);
670 // // Float_t iz = (250.0-TMath::Abs(p.GetZ())+0.11)/0.566;
672 // // TMath::Abs( Int_t(iz) - iz + 0.5);
673 // //ampc *= 1.15*(1-0.3*dy);
674 // //ampc *= 1.15*(1-0.3*dz);
675 // // Float_t zfactor = (AliTPCReconstructor::GetCtgRange()-0.0004*TMath::Abs(point->GetCPoint().GetZ()));
679 // //ampc = 1.0*point->GetCPoint().GetMax();
680 // ampc = 1.0*cl->GetMax();
681 // //ampc = 1.0*point->GetCPoint().GetQ();
682 // //AliTPCClusterPoint & p = point->GetCPoint();
683 // // Float_t dy = TMath::Abs(Int_t( TMath::Abs(p.GetY()/0.4)) - TMath::Abs(p.GetY()/0.4)+0.5);
684 // //Float_t iz = (250.0-TMath::Abs(p.GetZ())+0.11)/0.566;
686 // // TMath::Abs( Int_t(iz) - iz + 0.5);
688 // //ampc *= 1.15*(1-0.3*dy);
689 // //ampc *= 1.15*(1-0.3*dz);
690 // // Float_t zfactor = (1.02-0.000*TMath::Abs(point->GetCPoint().GetZ()));
694 // ampc *= 2.0; // put mean value to channel 50
695 // //ampc *= 0.58; // put mean value to channel 50
697 // // if (type>0) w = 1./(type/2.-0.5);
698 // // Float_t z = TMath::Abs(cl->GetZ());
701 // //ampc /= (1+0.0008*z);
705 // //ampc /= (1+0.0008*z);
707 // //ampc /= (1+0.0008*z);
710 // if (type<0) { //amp at the border - lower weight
715 // if (rsigma>1.5) ampc/=1.3; // if big backround
716 // amp[nc[of]] = ampc;
717 // amp[nc[of]] /=gainGG;
718 // angular[nc[of]] = TMath::Sqrt(1.+angley*angley+anglez*anglez);
719 // weight[nc[of]] = w;
723 // TMath::Sort(nc[of],amp,index,kFALSE);
725 // Float_t sumamp2=0;
727 // //meanlog = amp[index[Int_t(nc[of]*0.33)]];
729 // for (Int_t i=int(nc[of]*low+0.5);i<int(nc[of]*up+0.5);i++){
730 // Float_t ampl = amp[index[i]]/angular[index[i]];
731 // ampl = meanlog*TMath::Log(1.+ampl/meanlog);
733 // sumw += weight[index[i]];
734 // sumamp += weight[index[i]]*ampl;
735 // sumamp2 += weight[index[i]]*ampl*ampl;
736 // norm[of] += angular[index[i]]*weight[index[i]];
743 // mean[of] = sumamp/sumw;
744 // sigma[of] = sumamp2/sumw-mean[of]*mean[of];
745 // if (sigma[of]>0.1)
746 // sigma[of] = TMath::Sqrt(sigma[of]);
750 // mean[of] = (TMath::Exp(mean[of]/meanlog)-1)*meanlog;
751 // //mean *=(1-0.02*(sigma/(mean*0.17)-1.));
752 // //mean *=(1-0.1*(norm-1.));
759 // // mean[0]*= (1-0.05*(sigma[0]/(0.01+mean[1]*0.18)-1));
760 // // mean[1]*= (1-0.05*(sigma[1]/(0.01+mean[0]*0.18)-1));
763 // // dedx = (mean[0]* TMath::Sqrt((1.+nc[0]))+ mean[1]* TMath::Sqrt((1.+nc[1])) )/
764 // // ( TMath::Sqrt((1.+nc[0]))+TMath::Sqrt((1.+nc[1])));
768 // for (Int_t i =0;i<4;i++){
769 // if (nc[i]>2&&nc[i]<1000){
770 // dedx += mean[i] *nc[i];
771 // fSdEdx += sigma[i]*(nc[i]-2);
772 // fMAngular += norm[i] *nc[i];
776 // fDEDX[i] = mean[i];
777 // fSDEDX[i] = sigma[i];
778 // fNCDEDX[i]= nc[i];
790 // // Float_t dedx1 =dedx;
793 // for (Int_t i =0;i<4;i++){
794 // if (nc[i]>2&&nc[i]<1000){
795 // mean[i] = mean[i]*(1-0.12*(sigma[i]/(fSdEdx)-1.));
796 // dedx += mean[i] *nc[i];
798 // fDEDX[i] = mean[i];
807 Double_t AliTPCseed::Bethe(Double_t bg){
809 // This is the Bethe-Bloch function normalised to 1 at the minimum
814 bethe=(1.+ bg2)/bg2*(log(5940*bg2) - bg2/(1.+ bg2));
815 else // Density effect ( approximately :)
816 bethe=1.15*(1.+ bg2)/bg2*(log(3.5*5940*bg) - bg2/(1.+ bg2));
820 void AliTPCseed::CookPID()
823 // cook PID information according dEdx
825 Double_t fRange = 10.;
829 Int_t ns=AliPID::kSPECIES;
831 for (Int_t j=0; j<ns; j++) {
832 Double_t mass=AliPID::ParticleMass(j);
834 Double_t dedx=fdEdx/fMIP;
835 Double_t bethe=Bethe(mom/mass);
836 Double_t sigma=fRes*bethe;
838 if (TMath::Abs(dedx-bethe) > fRange*sigma) {
839 fTPCr[j]=TMath::Exp(-0.5*fRange*fRange)/sigma;
843 fTPCr[j]=TMath::Exp(-0.5*(dedx-bethe)*(dedx-bethe)/(sigma*sigma))/sigma;
851 for (Int_t j=0; j<ns; j++) {
852 fTPCr[j]/=sumr; //normalize
856 Double_t AliTPCseed::GetYat(Double_t xk) const {
857 //-----------------------------------------------------------------
858 // This function calculates the Y-coordinate of a track at the plane x=xk.
859 //-----------------------------------------------------------------
860 if (TMath::Abs(GetSnp())>AliTPCReconstructor::GetMaxSnpTrack()) return 0.; //patch 01 jan 06
861 Double_t c1=GetSnp(), r1=TMath::Sqrt((1.-c1)*(1.+c1));
862 Double_t c2=c1+GetC()*(xk-GetX());
863 if (TMath::Abs(c2)>AliTPCReconstructor::GetMaxSnpTrack()) return 0;
864 Double_t r2=TMath::Sqrt((1.-c2)*(1.+c2));
865 return GetY() + (xk-GetX())*(c1+c2)/(r1+r2);
868 void AliTPCseed::SetClusterMapBit(int ibit, Bool_t state)
870 fClusterMap[ibit] = state;
872 Bool_t AliTPCseed::GetClusterMapBit(int ibit)
874 return fClusterMap[ibit];
876 void AliTPCseed::SetSharedMapBit(int ibit, Bool_t state)
878 fSharedMap[ibit] = state;
880 Bool_t AliTPCseed::GetSharedMapBit(int ibit)
882 return fSharedMap[ibit];
889 Float_t AliTPCseed::CookdEdxNorm(Double_t low, Double_t up, Int_t type, Int_t i1, Int_t i2, Bool_t shapeNorm,Bool_t posNorm, Int_t padNorm){
892 // calculates dedx using the cluster
893 // low - up specify trunc mean range - default form 0-0.7
894 // type - 1 - max charge or 0- total charge in cluster
895 // //2- max no corr 3- total+ correction
896 // i1-i2 - the pad-row range used for calculation
897 // shapeNorm - kTRUE -taken from OCDB
899 // posNorm - usage of pos normalization
902 // normalization parametrization taken from AliTPCClusterParam
904 AliTPCClusterParam * parcl = AliTPCcalibDB::Instance()->GetClusterParam();
905 AliTPCParam * param = AliTPCcalibDB::Instance()->GetParameters();
906 if (!parcl) return 0;
907 if (!param) return 0;
913 Float_t gainGG = 1; // gas gain factor -always enabled
914 Float_t gainPad = 1; // gain map - used always
915 Float_t corrShape = 1; //
916 Float_t corrPos = 1; // local position correction - if posNorm enabled
917 Float_t corrPadType = 1; // pad type correction - if padNorm enabled
918 Float_t corrNorm = 1; // normalization factor - set Q to channel 50
922 if (AliTPCcalibDB::Instance()->GetParameters()){
923 gainGG= AliTPCcalibDB::Instance()->GetParameters()->GetGasGain()/20000; //relative gas gain
926 const Float_t ktany = TMath::Tan(TMath::DegToRad()*10);
927 const Float_t kedgey =3.;
930 for (Int_t irow=i1; irow<i2; irow++){
931 AliTPCclusterMI* cluster = GetClusterPointer(irow);
932 if (!cluster) continue;
933 if (TMath::Abs(cluster->GetY())>cluster->GetX()*ktany-kedgey) continue; // edge cluster
934 Float_t charge= (type%2)? cluster->GetMax():cluster->GetQ();
937 if (irow>127) ipad=2;
941 AliTPCCalPad * gainMap = AliTPCcalibDB::Instance()->GetDedxGainFactor();
944 // Get gainPad - pad by pad calibration
947 AliTPCCalROC * roc = gainMap->GetCalROC(cluster->GetDetector());
948 if (irow < 63) { // IROC
949 factor = roc->GetValue(irow, TMath::Nint(cluster->GetPad()));
951 factor = roc->GetValue(irow - 63, TMath::Nint(cluster->GetPad()));
953 if (factor>0.5) gainPad=factor;
956 //do position and angular normalization
961 AliTPCTrackerPoint * point = GetTrackPoint(irow);
962 Float_t ty = TMath::Abs(point->GetAngleY());
963 Float_t tz = TMath::Abs(point->GetAngleZ());
965 Float_t dr = (250.-TMath::Abs(cluster->GetZ()))/250.;
966 corrShape = parcl->Qnorm(ipad,type,dr,ty,tz);
972 // Do position normalization - relative distance to
973 // center of pad- time bin
975 corrPos = parcl->QnormPos(ipad,type, cluster->GetPad(),
976 cluster->GetTimeBin(), cluster->GetZ(),
977 cluster->GetSigmaY2(),cluster->GetSigmaZ2(),
978 cluster->GetMax(),cluster->GetQ());
983 if (type==0 && parcl->fQpadTnorm) corrPadType = (*parcl->fQpadTnorm)[ipad];
984 if (type==1 && parcl->fQpadTnorm) corrPadType = (*parcl->fQpadMnorm)[ipad];
987 corrPadType =param->GetPadPitchLength(cluster->GetDetector(),cluster->GetRow());
988 //use hardwired - temp fix
989 if (type==0) corrNorm=3.;
990 if (type==1) corrNorm=1.;
997 amp[ncl]/=corrPadType;
1004 if (type>3) return ncl;
1005 TMath::Sort(ncl,amp, indexes, kFALSE);
1007 if (ncl<10) return 0;
1011 Int_t icl0=TMath::Nint(ncl*low);
1012 Int_t icl1=TMath::Nint(ncl*up);
1013 for (Int_t icl=icl0; icl<icl1;icl++){
1014 suma+=amp[indexes[icl]];
1021 Double_t AliTPCseed::BetheMass(Double_t mass){
1023 // return bethe-bloch
1025 Float_t bg= P()/mass;
1026 const Double_t kp1=0.76176e-1;
1027 const Double_t kp2=10.632;
1028 const Double_t kp3=0.13279e-4;
1029 const Double_t kp4=1.8631;
1030 const Double_t kp5=1.9479;
1032 Double_t dbg = (Double_t) bg;
1034 Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
1036 Double_t aa = TMath::Power(beta,kp4);
1037 Double_t bb = TMath::Power(1./dbg,kp5);
1039 bb=TMath::Log(kp3+bb);
1041 return ((Float_t)((kp2-aa-bb)*kp1/aa));
1045 Float_t AliTPCseed::CookShape(Int_t type){
1049 //-----------------------------------------------------------------
1050 // This funtion calculates dE/dX within the "low" and "up" cuts.
1051 //-----------------------------------------------------------------
1054 for (Int_t i =0; i<160;i++) {
1055 AliTPCTrackerPoint * point = GetTrackPoint(i);
1056 if (point==0) continue;
1058 AliTPCclusterMI * cl = fClusterPointer[i];
1059 if (cl==0) continue;
1061 Float_t rsigmay = TMath::Sqrt(point->GetSigmaY());
1062 Float_t rsigmaz = TMath::Sqrt(point->GetSigmaZ());
1063 Float_t rsigma = (rsigmay+rsigmaz)*0.5;
1064 if (type==0) means+=rsigma;
1065 if (type==1) means+=rsigmay;
1066 if (type==2) means+=rsigmaz;
1069 Float_t mean = (meanc>0)? means/meanc:0;
1075 Int_t AliTPCseed::RefitTrack(AliTPCseed *seed, AliExternalTrackParam * parin, AliExternalTrackParam * parout){
1078 // return value - number of used clusters
1081 const Int_t kMinNcl =10;
1082 AliTPCseed *track=new AliTPCseed(*seed);
1087 for (Int_t i=0;i<15;i++) covar[i]=0;
1090 covar[5]=10.*10./(64.*64.);
1091 covar[9]=10.*10./(64.*64.);
1095 Float_t xmin=1000, xmax=-10000;
1096 Int_t imin=158, imax=0;
1097 for (Int_t i=0;i<160;i++) {
1098 AliTPCclusterMI *c=track->GetClusterPointer(i);
1100 if (sector<0) sector = c->GetDetector();
1101 if (c->GetX()<xmin) xmin=c->GetX();
1102 if (c->GetX()>xmax) xmax=c->GetX();
1106 if(imax-imin<kMinNcl) {
1110 // Not succes to rotate
1111 if (!track->Rotate(TMath::DegToRad()*(sector%18*20.+10.)-track->GetAlpha())) {
1117 // fit from inner to outer row
1119 AliExternalTrackParam paramIn;
1120 AliExternalTrackParam paramOut;
1126 for (Int_t i=imin; i<=imax; i++){
1127 AliTPCclusterMI *c=track->GetClusterPointer(i);
1129 // if (RejectCluster(c,track)) continue;
1130 sector = (c->GetDetector()%18);
1131 if (!track->Rotate(TMath::DegToRad()*(sector%18*20.+10.)-track->GetAlpha())) {
1134 Double_t r[3]={c->GetX(),c->GetY(),c->GetZ()};
1135 Double_t cov[3]={0.01,0.,0.01}; //TODO: correct error parametrisation
1136 if (!track->PropagateTo(r[0])) {
1139 if ( !((static_cast<AliExternalTrackParam*>(track)->Update(&r[1],cov)))) isOK=kFALSE;
1141 if (!isOK) { delete track; return 0;}
1142 track->AddCovariance(covar);
1146 for (Int_t i=imax; i>=imin; i--){
1147 AliTPCclusterMI *c=track->GetClusterPointer(i);
1149 //if (RejectCluster(c,track)) continue;
1150 sector = (c->GetDetector()%18);
1151 if (!track->Rotate(TMath::DegToRad()*(sector%18*20.+10.)-track->GetAlpha())) {
1154 Double_t r[3]={c->GetX(),c->GetY(),c->GetZ()};
1155 Double_t cov[3]={0.01,0.,0.01}; //TODO: correct error parametrisation
1156 if (!track->PropagateTo(r[0])) {
1159 if ( !((static_cast<AliExternalTrackParam*>(track)->Update(&r[1],cov)))) isOK=kFALSE;
1161 //if (!isOK) { delete track; return 0;}
1163 track->AddCovariance(covar);
1166 for (Int_t i=imin; i<=imax; i++){
1167 AliTPCclusterMI *c=track->GetClusterPointer(i);
1169 sector = (c->GetDetector()%18);
1170 if (!track->Rotate(TMath::DegToRad()*(sector%18*20.+10.)-track->GetAlpha())) {
1174 //if (RejectCluster(c,track)) continue;
1175 Double_t r[3]={c->GetX(),c->GetY(),c->GetZ()};
1176 Double_t cov[3]={0.01,0.,0.01}; //TODO: correct error parametrisation
1177 if (!track->PropagateTo(r[0])) {
1180 if ( !((static_cast<AliExternalTrackParam*>(track)->Update(&r[1],cov)))) isOK=kFALSE;
1182 //if (!isOK) { delete track; return 0;}
1187 if (parin) (*parin)=paramIn;
1188 if (parout) (*parout)=paramOut;
1194 Bool_t AliTPCseed::RefitTrack(AliTPCseed* /*seed*/, Bool_t /*out*/){
1206 void AliTPCseed::GetError(AliTPCclusterMI* cluster, AliExternalTrackParam * param,
1207 Double_t& erry, Double_t &errz)
1210 // Get cluster error at given position
1212 AliTPCClusterParam *clusterParam = AliTPCcalibDB::Instance()->GetClusterParam();
1214 Double_t snp1=param->GetSnp();
1215 tany=snp1/TMath::Sqrt((1.-snp1)*(1.+snp1));
1217 Double_t tgl1=param->GetTgl();
1218 tanz=tgl1/TMath::Sqrt((1.-snp1)*(1.+snp1));
1220 Int_t padSize = 0; // short pads
1221 if (cluster->GetDetector() >= 36) {
1222 padSize = 1; // medium pads
1223 if (cluster->GetRow() > 63) padSize = 2; // long pads
1226 erry = clusterParam->GetError0Par( 0, padSize, (250.0 - TMath::Abs(cluster->GetZ())), TMath::Abs(tany) );
1227 errz = clusterParam->GetError0Par( 1, padSize, (250.0 - TMath::Abs(cluster->GetZ())), TMath::Abs(tanz) );
1231 void AliTPCseed::GetShape(AliTPCclusterMI* cluster, AliExternalTrackParam * param,
1232 Double_t& rmsy, Double_t &rmsz)
1235 // Get cluster error at given position
1237 AliTPCClusterParam *clusterParam = AliTPCcalibDB::Instance()->GetClusterParam();
1239 Double_t snp1=param->GetSnp();
1240 tany=snp1/TMath::Sqrt((1.-snp1)*(1.+snp1));
1242 Double_t tgl1=param->GetTgl();
1243 tanz=tgl1/TMath::Sqrt((1.-snp1)*(1.+snp1));
1245 Int_t padSize = 0; // short pads
1246 if (cluster->GetDetector() >= 36) {
1247 padSize = 1; // medium pads
1248 if (cluster->GetRow() > 63) padSize = 2; // long pads
1251 rmsy = clusterParam->GetRMSQ( 0, padSize, (250.0 - TMath::Abs(cluster->GetZ())), TMath::Abs(tany), TMath::Abs(cluster->GetMax()) );
1252 rmsz = clusterParam->GetRMSQ( 1, padSize, (250.0 - TMath::Abs(cluster->GetZ())), TMath::Abs(tanz) ,TMath::Abs(cluster->GetMax()));
1257 Double_t AliTPCseed::GetQCorrGeom(Float_t ty, Float_t tz){
1259 //ty - tangent in local y direction
1262 Float_t norm=TMath::Sqrt(1+ty*ty+tz*tz);
1266 Double_t AliTPCseed::GetQCorrShape(Int_t ipad, Int_t type,Float_t z, Float_t ty, Float_t tz, Float_t q, Float_t thr){
1270 // return value = Q Normalization factor
1271 // Normalization - 1 - shape factor part for full drift
1272 // 1 - electron attachment for 0 drift
1274 // Input parameters:
1276 // ipad - 0 short pad
1283 //z - z position (-250,250 cm)
1284 //ty - tangent in local y direction
1288 AliTPCClusterParam * paramCl = AliTPCcalibDB::Instance()->GetClusterParam();
1289 AliTPCParam * paramTPC = AliTPCcalibDB::Instance()->GetParameters();
1291 if (!paramCl) return 1;
1293 Double_t dr = 250.-TMath::Abs(z);
1294 Double_t sy = paramCl->GetRMS0( 0,ipad, dr, TMath::Abs(ty));
1295 Double_t sy0= paramCl->GetRMS0(0,ipad, 250, 0);
1296 Double_t sz = paramCl->GetRMS0( 1,ipad, dr, TMath::Abs(tz));
1297 Double_t sz0= paramCl->GetRMS0(1,ipad, 250, 0);
1299 Double_t sfactorMax = TMath::Sqrt(sy0*sz0/(sy*sz));
1302 Double_t dt = 1000000*(dr/paramTPC->GetDriftV()); //time in microsecond
1303 Double_t attProb = TMath::Exp(-paramTPC->GetAttCoef()*paramTPC->GetOxyCont()*dt);
1306 if (type==0) return sfactorMax*attProb;