1 /**************************************************************************
2 * Copyright(c) 1998-2007, 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 **************************************************************************/
18 //-------------------------------------------------------------------------
19 // AOD track implementation of AliVParticle
20 // Author: Markus Oldenburg, CERN
21 // Markus.Oldenburg@cern.ch
22 //-------------------------------------------------------------------------
24 #include "AliAODTrack.h"
26 //#include <TPDGCode.h>
27 //#include <TDatabasePDG.h>
31 //______________________________________________________________________________
32 AliAODTrack::AliAODTrack() :
35 fChi2MatchTrigger(0.),
37 fITSMuonClusterMap(0),
45 // default constructor
48 SetPosition((Float_t*)NULL);
49 SetPID((Float_t*)NULL);
52 //______________________________________________________________________________
53 AliAODTrack::AliAODTrack(Short_t id,
59 Double_t covMatrix[21],
63 AliAODVertex *prodVertex,
65 Bool_t usedForPrimVtxFit,
70 fChi2MatchTrigger(0.),
72 fITSMuonClusterMap(itsClusMap),
73 fFilterMap(selectInfo),
78 fProdVertex(prodVertex)
83 SetPosition(x, isDCA);
84 SetUsedForVtxFit(usedForVtxFit);
85 SetUsedForPrimVtxFit(usedForPrimVtxFit);
86 if(covMatrix) SetCovMatrix(covMatrix);
91 //______________________________________________________________________________
92 AliAODTrack::AliAODTrack(Short_t id,
98 Float_t covMatrix[21],
102 AliAODVertex *prodVertex,
103 Bool_t usedForVtxFit,
104 Bool_t usedForPrimVtxFit,
109 fChi2MatchTrigger(0.),
111 fITSMuonClusterMap(itsClusMap),
112 fFilterMap(selectInfo),
117 fProdVertex(prodVertex)
122 SetPosition(x, isDCA);
123 SetUsedForVtxFit(usedForVtxFit);
124 SetUsedForPrimVtxFit(usedForPrimVtxFit);
125 if(covMatrix) SetCovMatrix(covMatrix);
129 //______________________________________________________________________________
130 AliAODTrack::~AliAODTrack()
137 //______________________________________________________________________________
138 AliAODTrack::AliAODTrack(const AliAODTrack& trk) :
140 fChi2perNDF(trk.fChi2perNDF),
141 fChi2MatchTrigger(trk.fChi2MatchTrigger),
143 fITSMuonClusterMap(trk.fITSMuonClusterMap),
144 fFilterMap(trk.fFilterMap),
146 fCharge(trk.fCharge),
149 fProdVertex(trk.fProdVertex)
154 trk.GetPosition(fPosition);
155 SetUsedForVtxFit(trk.GetUsedForVtxFit());
156 SetUsedForPrimVtxFit(trk.GetUsedForPrimVtxFit());
157 if(trk.fCovMatrix) fCovMatrix=new AliAODRedCov<6>(*trk.fCovMatrix);
162 //______________________________________________________________________________
163 AliAODTrack& AliAODTrack::operator=(const AliAODTrack& trk)
165 // Assignment operator
168 AliVParticle::operator=(trk);
171 trk.GetPosition(fPosition);
174 fChi2perNDF = trk.fChi2perNDF;
175 fChi2MatchTrigger = trk.fChi2MatchTrigger;
180 fITSMuonClusterMap = trk.fITSMuonClusterMap;
181 fFilterMap = trk.fFilterMap;
183 fCharge = trk.fCharge;
187 if(trk.fCovMatrix) fCovMatrix=new AliAODRedCov<6>(*trk.fCovMatrix);
188 else fCovMatrix=NULL;
189 fProdVertex = trk.fProdVertex;
191 SetUsedForVtxFit(trk.GetUsedForVtxFit());
192 SetUsedForPrimVtxFit(trk.GetUsedForPrimVtxFit());
198 //______________________________________________________________________________
199 Double_t AliAODTrack::M(AODTrkPID_t pid) const
202 // Masses for nuclei don't exist in the PDG tables, therefore they were put by hand.
207 return 0.000510999; //TDatabasePDG::Instance()->GetParticle(11/*::kElectron*/)->Mass();
211 return 0.1056584; //TDatabasePDG::Instance()->GetParticle(13/*::kMuonMinus*/)->Mass();
215 return 0.13957; //TDatabasePDG::Instance()->GetParticle(211/*::kPiPlus*/)->Mass();
219 return 0.4937; //TDatabasePDG::Instance()->GetParticle(321/*::kKPlus*/)->Mass();
223 return 0.9382720; //TDatabasePDG::Instance()->GetParticle(2212/*::kProton*/)->Mass();
227 return 1.8756; //TDatabasePDG::Instance()->GetParticle(1000010020)->Mass();
231 return 2.8089; //TDatabasePDG::Instance()->GetParticle(1000010030)->Mass();
235 return 2.8084; //TDatabasePDG::Instance()->GetParticle(1000020030)->Mass();
239 return 3.7274; //TDatabasePDG::Instance()->GetParticle(1000020040)->Mass();
251 //______________________________________________________________________________
252 Double_t AliAODTrack::E(AODTrkPID_t pid) const
254 // Returns the energy of the particle of a given pid.
256 if (pid != kUnknown) { // particle was identified
258 return TMath::Sqrt(P()*P() + m*m);
259 } else { // pid unknown
264 //______________________________________________________________________________
265 Double_t AliAODTrack::Y(AODTrkPID_t pid) const
267 // Returns the rapidity of a particle of a given pid.
269 if (pid != kUnknown) { // particle was identified
272 if (e>=0 && e!=pz) { // energy was positive (e.g. not -999.) and not equal to pz
273 return 0.5*TMath::Log((e+pz)/(e-pz));
274 } else { // energy not known or equal to pz
277 } else { // pid unknown
282 //______________________________________________________________________________
283 Double_t AliAODTrack::Y(Double_t m) const
285 // Returns the rapidity of a particle of a given mass.
287 if (m >= 0.) { // mass makes sense
290 if (e>=0 && e!=pz) { // energy was positive (e.g. not -999.) and not equal to pz
291 return 0.5*TMath::Log((e+pz)/(e-pz));
292 } else { // energy not known or equal to pz
295 } else { // pid unknown
300 //______________________________________________________________________________
301 AliAODTrack::AODTrkPID_t AliAODTrack::GetMostProbablePID() const
303 // Returns the most probable PID array element.
307 AODTrkPID_t loc = kUnknown;
309 Bool_t allTheSame = kTRUE;
311 for (Int_t iPID = 0; iPID < nPID; iPID++) {
312 if (fPID[iPID] >= max) {
313 if (fPID[iPID] > max) {
316 loc = (AODTrkPID_t)iPID;
323 return allTheSame ? kUnknown : loc;
329 //______________________________________________________________________________
330 void AliAODTrack::ConvertAliPIDtoAODPID()
332 // Converts AliPID array.
333 // The numbering scheme is the same for electrons, muons, pions, kaons, and protons.
334 // Everything else has to be set to zero.
336 fPID[kDeuteron] = 0.;
346 //______________________________________________________________________________
347 template <class T> void AliAODTrack::SetP(const T *p, const Bool_t cartesian)
353 Double_t pt2 = p[0]*p[0] + p[1]*p[1];
354 Double_t pp = TMath::Sqrt(pt2 + p[2]*p[2]);
356 fMomentum[0] = TMath::Sqrt(pt2); // pt
357 fMomentum[1] = (pt2 != 0.) ? TMath::Pi()+TMath::ATan2(-p[1], -p[0]) : -999; // phi
358 fMomentum[2] = (pp != 0.) ? TMath::ACos(p[2] / pp) : -999.; // theta
360 fMomentum[0] = p[0]; // pt
361 fMomentum[1] = p[1]; // phi
362 fMomentum[2] = p[2]; // theta
365 fMomentum[0] = -999.;
366 fMomentum[1] = -999.;
367 fMomentum[2] = -999.;
371 //______________________________________________________________________________
372 template <class T> void AliAODTrack::SetPosition(const T *x, const Bool_t dca)
385 // don't know any better yet
386 fPosition[0] = -999.;
387 fPosition[1] = -999.;
388 fPosition[2] = -999.;
393 fPosition[0] = -999.;
394 fPosition[1] = -999.;
395 fPosition[2] = -999.;
399 //______________________________________________________________________________
400 void AliAODTrack::SetDCA(Double_t d, Double_t z)
409 //______________________________________________________________________________
410 void AliAODTrack::Print(Option_t* /* option */) const
412 // prints information about AliAODTrack
414 printf("Object name: %s Track type: %s\n", GetName(), GetTitle());
415 printf(" px = %f\n", Px());
416 printf(" py = %f\n", Py());
417 printf(" pz = %f\n", Pz());
418 printf(" pt = %f\n", Pt());
419 printf(" 1/pt = %f\n", OneOverPt());
420 printf(" theta = %f\n", Theta());
421 printf(" phi = %f\n", Phi());
422 printf(" chi2/NDF = %f\n", Chi2perNDF());
423 printf(" charge = %d\n", Charge());
424 printf(" PID object: %p\n", PID());
427 void AliAODTrack::SetMatchTrigger(Int_t MatchTrigger){
429 // Set the MUON trigger information
430 switch(MatchTrigger){
431 case 0: // 0 track does not match trigger
432 fITSMuonClusterMap=fITSMuonClusterMap&0x3fffffff;
434 case 1: // 1 track match but does not pass pt cut
435 fITSMuonClusterMap=(fITSMuonClusterMap&0x3fffffff)|0x40000000;
437 case 2: // 2 track match Low pt cut
438 fITSMuonClusterMap=(fITSMuonClusterMap&0x3fffffff)|0x80000000;
440 case 3: // 3 track match High pt cut
441 fITSMuonClusterMap=fITSMuonClusterMap|0xc0000000;
444 fITSMuonClusterMap=fITSMuonClusterMap&0x3fffffff;
445 printf("AliAODTrack::SetMatchTrigger unknown case for MatchTrigger: %d\n",MatchTrigger);
449 void AliAODTrack::SetHitsPatternInTrigCh(UShort_t hitsPatternInTrigCh){
451 // Set the MUON hit pattern (1 bit per chamber)
452 fITSMuonClusterMap=(fITSMuonClusterMap&0xffff00ff)|(hitsPatternInTrigCh<<8);
455 Int_t AliAODTrack::HitsMT(Int_t istation, Int_t iplane, Char_t *cathode){
457 // Retrieve hit information for MUON identified by (station, plane, cathode)
459 if(cathode[0]=='x'||cathode[0]=='X'){
462 return (fITSMuonClusterMap&0x8000)?1:0;
464 return (fITSMuonClusterMap&0x4000)?1:0;
467 }else if(istation==2){
469 return (fITSMuonClusterMap&0x2000)?1:0;
471 return (fITSMuonClusterMap&0x1000)?1:0;
477 }else if(cathode[0]=='y'||cathode[0]=='Y'){
480 return (fITSMuonClusterMap&0x0800)?1:0;
482 return (fITSMuonClusterMap&0x0400)?1:0;
485 }else if(istation==2){
487 return (fITSMuonClusterMap&0x0200)?1:0;
489 return (fITSMuonClusterMap&0x0100)?1:0;
501 return (HitsMT(1,1,"X")||HitsMT(1,1,"Y"))?1:0;
503 return (HitsMT(1,2,"X")||HitsMT(1,2,"Y"))?1:0;
506 }else if(istation==2){
508 return (HitsMT(2,1,"X")||HitsMT(2,1,"Y"))?1:0;
510 return (HitsMT(2,2,"X")||HitsMT(2,2,"Y"))?1:0;
519 Int_t AliAODTrack::HitsMuonChamber(Int_t MuonChamber){
520 // Retrieve hit information for MUON Chamber
531 printf("Unknown MUON chamber: %d\n",MuonChamber);
538 Bool_t AliAODTrack::PropagateTo(Double_t xk, Double_t b) {
539 //----------------------------------------------------------------
540 // Propagate this track to the plane X=xk (cm) in the field "b" (kG)
541 // This is in local coordinates!!!
542 //----------------------------------------------------------------
545 Double_t localP[3] = {Px(), Py(), Pz()}; // set global (sic!) p
546 Global2LocalMomentum(localP, Charge(), alpha); // convert global to local momentum
548 AliAODVertex *origin = (AliAODVertex*)fProdVertex.GetObject();
549 Double_t localX[3] = {origin->GetX(), origin->GetY(), origin->GetZ()}; // set global (sic!) location of first track point
550 Global2LocalPosition(localX, alpha); // convert global to local position
552 Double_t &fX = localX[0];
555 if (TMath::Abs(dx)<=kAlmost0) return kTRUE;
557 Double_t crv=localP[0]*b*kB2C;
558 if (TMath::Abs(b) < kAlmost0Field) crv=0.;
560 Double_t f1=localP[1], f2=f1 + crv*dx;
561 if (TMath::Abs(f1) >= kAlmost1) return kFALSE;
562 if (TMath::Abs(f2) >= kAlmost1) return kFALSE;
564 Double_t &fP0=localX[1], &fP1=localX[2], &fP2=localP[0], &fP3=localP[1], &fP4=localP[2];
565 /* covariance matrix to be fixed!
568 &fC10=fC[1], &fC11=fC[2],
569 &fC20=fC[3], &fC21=fC[4], &fC22=fC[5],
570 &fC30=fC[6], &fC31=fC[7], &fC32=fC[8], &fC33=fC[9],
571 &fC40=fC[10], &fC41=fC[11], &fC42=fC[12], &fC43=fC[13], &fC44=fC[14];
573 Double_t r1=TMath::Sqrt(1.- f1*f1), r2=TMath::Sqrt(1.- f2*f2);
576 fP0 += dx*(f1+f2)/(r1+r2);
577 fP1 += dx*(r2 + f2*(f1+f2)/(r1+r2))*fP3;
582 Double_t f02= dx/(r1*r1*r1); Double_t cc=crv/fP4;
583 Double_t f04=0.5*dx*dx/(r1*r1*r1); f04*=cc;
584 Double_t f12= dx*fP3*f1/(r1*r1*r1);
585 Double_t f14=0.5*dx*dx*fP3*f1/(r1*r1*r1); f14*=cc;
587 Double_t f24= dx; f24*=cc;
589 /* covariance matrix to be fixed!
591 Double_t b00=f02*fC20 + f04*fC40, b01=f12*fC20 + f14*fC40 + f13*fC30;
592 Double_t b02=f24*fC40;
593 Double_t b10=f02*fC21 + f04*fC41, b11=f12*fC21 + f14*fC41 + f13*fC31;
594 Double_t b12=f24*fC41;
595 Double_t b20=f02*fC22 + f04*fC42, b21=f12*fC22 + f14*fC42 + f13*fC32;
596 Double_t b22=f24*fC42;
597 Double_t b40=f02*fC42 + f04*fC44, b41=f12*fC42 + f14*fC44 + f13*fC43;
598 Double_t b42=f24*fC44;
599 Double_t b30=f02*fC32 + f04*fC43, b31=f12*fC32 + f14*fC43 + f13*fC33;
600 Double_t b32=f24*fC43;
603 Double_t a00=f02*b20+f04*b40,a01=f02*b21+f04*b41,a02=f02*b22+f04*b42;
604 Double_t a11=f12*b21+f14*b41+f13*b31,a12=f12*b22+f14*b42+f13*b32;
605 Double_t a22=f24*b42;
607 //F*C*Ft = C + (b + bt + a)
608 fC00 += b00 + b00 + a00;
609 fC10 += b10 + b01 + a01;
610 fC20 += b20 + b02 + a02;
613 fC11 += b11 + b11 + a11;
614 fC21 += b21 + b12 + a12;
617 fC22 += b22 + b22 + a22;
622 Local2GlobalMomentum(localP, alpha); // convert local to global momentum