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1#ifndef ALIITSTRACKV2_H
2#define ALIITSTRACKV2_H
3/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
5
6//-------------------------------------------------------------------------
7// ITS Track Class
8//
9// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
10// dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
11//-------------------------------------------------------------------------
12
13
14/*****************************************************************************
15 * December 18, 2000 *
16 * Internal view of the ITS track parametrisation as well as the order of *
17 * track parameters are subject for possible changes ! *
18 * Use GetExternalParameters() and GetExternalCovariance() to access ITS *
19 * track information regardless of its internal representation. *
20 * This formation is now fixed in the following way: *
21 * external param0: local Y-coordinate of a track (cm) *
22 * external param1: local Z-coordinate of a track (cm) *
23 * external param2: local sine of the track momentum azimuthal angle *
24 * external param3: tangent of the track momentum dip angle *
25 * external param4: 1/pt (1/(GeV/c)) *
26 *****************************************************************************/
27
28#include <AliKalmanTrack.h>
29
30#include "AliITSrecoV2.h"
31
32class AliESDtrack;
33class AliTPCtrack;
34
35//_____________________________________________________________________________
36class AliITStrackV2 : public AliKalmanTrack {
37 friend class AliITStrackerV2;
38 friend class AliITStrackerMI;
39public:
40 AliITStrackV2();
41 AliITStrackV2(const AliTPCtrack& t) throw (const Char_t *);
42 AliITStrackV2(AliESDtrack& t,Bool_t c=kFALSE) throw (const Char_t *);
43 AliITStrackV2(const AliITStrackV2& t);
44 Int_t PropagateToVertex(Double_t d=0., Double_t x0=0.);
45 Int_t Propagate(Double_t alpha, Double_t xr);
46 Int_t GetProlongationFast(Double_t alpha, Double_t xr,Double_t &y, Double_t &z);
47 Int_t CorrectForMaterial(Double_t d, Double_t x0=21.82);
48 Int_t PropagateTo(Double_t xr, Double_t d, Double_t x0=21.82);
49 Int_t Update(const AliCluster* cl,Double_t chi2,UInt_t i);
50 Int_t UpdateMI(Double_t cy, Double_t cz, Double_t cerry, Double_t cerrz, Double_t chi2,UInt_t i);
51 Int_t Improve(Double_t x0,Double_t xyz[3],Double_t ers[3]);
52 void SetdEdx(Double_t dedx) {fdEdx=dedx;}
53 void SetSampledEdx(Float_t q, Int_t i);
54 void CookdEdx(Double_t low=0., Double_t up=0.51);
55 void SetDetectorIndex(Int_t i) {SetLabel(i);}
56 void ResetCovariance();
57 void ResetClusters() { SetChi2(0.); SetNumberOfClusters(0); }
58 void UpdateESDtrack(ULong_t flags);
59 void SetConstrainedESDtrack(Double_t chi2);
60 void SetReconstructed(Bool_t sr=kTRUE){fReconstructed = sr;}
61
62 Bool_t GetReconstructed() const {return fReconstructed;}
63 void SetChi2MIP(Int_t i,Float_t val){fChi2MIP[i]=val;}
64 Float_t GetChi2MIP(Int_t i) const {return fChi2MIP[i];}
65 void IncrementNSkipped(){fNSkipped++;} // increment by 1 the # of skipped cls
66 Float_t GetNSkipped() const {return fNSkipped;}
67 void IncrementNUsed(){fNUsed++;} // increment by 1 the # of shared clusters
68 Float_t GetNUsed() const {return fNUsed;}
69 AliESDtrack *GetESDtrack() const {return fESDtrack;}
70 Double_t GetCov33() const {return fC33;} // cov. matrix el. 3,3
71 Double_t GetCov44() const {return fC44;} // cov. matrix el. 4,4
72 Float_t GetDy(Int_t i) const {return fDy[i];}
73 Float_t GetDz(Int_t i) const {return fDz[i];}
74 Float_t GetSigmaY(Int_t i) const {return fSigmaY[i];}
75 Float_t GetSigmaZ(Int_t i) const {return fSigmaZ[i];}
76
77
78
79 Int_t GetDetectorIndex() const {return GetLabel();}
80 Double_t GetX() const {return fX;}
81 Double_t GetAlpha()const {return fAlpha;}
82 Double_t GetdEdx() const {return fdEdx;}
83 Double_t GetPIDsignal() const {return GetdEdx();}
84 Double_t GetY() const {return fP0;}
85 Double_t GetZ() const {return fP1;}
86 Double_t GetSnp() const {return fP2;}
87 Double_t GetTgl() const {return fP3;}
88 Double_t GetC() const {return fP4;}
89 Double_t
90 Get1Pt() const { return (1e-9*TMath::Abs(fP4)/fP4 + fP4)*GetConvConst(); }
91 Double_t GetD(Double_t x=0, Double_t y=0) const;
92 Double_t GetZat(Double_t x=0) const;
93
94 Double_t GetSigmaY2() const {return fC00;}
95 Double_t GetSigmaZ2() const {return fC11;}
96 Int_t Compare(const TObject *o) const;
97 void GetExternalParameters(Double_t& xr, Double_t x[5]) const ;
98 void GetExternalCovariance(Double_t cov[15]) const ;
99 Int_t GetClusterIndex(Int_t i) const {return fIndex[i];}
100 Int_t GetGlobalXYZat(Double_t r,Double_t &x,Double_t &y,Double_t &z) const;
101 Double_t GetPredictedChi2(const AliCluster *cluster) const;
102 Double_t GetPredictedChi2MI(Double_t cy, Double_t cz, Double_t cerry, Double_t cerrz) const;
103 Int_t Invariant() const;
104
105protected:
106 Double_t fX; // X-coordinate of this track (reference plane)
107 Double_t fAlpha; // rotation angle
108
109 Double_t fdEdx; // dE/dx
110
111 Double_t fP0; // Y-coordinate of a track
112 Double_t fP1; // Z-coordinate of a track
113 Double_t fP2; // sine of the track momentum azimuthal angle
114 Double_t fP3; // tangent of the track momentum dip angle
115 Double_t fP4; // track curvature
116
117 Double_t fC00; // covariance
118 Double_t fC10, fC11; // matrix
119 Double_t fC20, fC21, fC22; // of the
120 Double_t fC30, fC31, fC32, fC33; // track
121 Double_t fC40, fC41, fC42, fC43, fC44; // parameters
122 Float_t fNUsed; // number of shared clusters
123 Float_t fNSkipped; // number of skipped clusters
124 Float_t fNDeadZone; // number of clusters in dead zone
125 Float_t fDeadZoneProbability; // probability to cross dead zone
126 Bool_t fReconstructed; // reconstructed - accepted flag
127 Float_t fChi2MIP[12]; // MIP chi squres
128 UInt_t fIndex[kMaxLayer]; // indices of associated clusters
129 Float_t fdEdxSample[4]; // array of dE/dx samples b.b.
130 Float_t fDy[12]; //dy in layer
131 Float_t fDz[12]; //dz in layer
132 Float_t fSigmaY[12]; //sigma y
133 Float_t fSigmaZ[12]; //sigma z
134 Float_t fNy[6]; //expected size of cluster
135 Float_t fNz[6]; //expected size of cluster
136 Float_t fD[2]; //distance to the vertex
137 Float_t fNormQ[6]; // normalized Q
138 Float_t fExpQ; // expected Q
139 Float_t fNormChi2[6]; // normalized chi2
140 Float_t fChi22; // chi22
141 Float_t fdEdxMismatch;
142 Bool_t fConstrain; //indication of the vertex constrain
143 Int_t fClIndex[6]; //cluster Index
144 AliESDtrack *fESDtrack; //! pointer to the connected ESD track
145 ClassDef(AliITStrackV2,3) //ITS reconstructed track
146};
147
148inline
149void AliITStrackV2::GetExternalParameters(Double_t& xr, Double_t x[5]) const {
150 //---------------------------------------------------------------------
151 // This function return external ITS track representation
152 //---------------------------------------------------------------------
153 xr=fX;
154 x[0]=GetY(); x[1]=GetZ(); x[2]=GetSnp(); x[3]=GetTgl(); x[4]=Get1Pt();
155}
156
157inline
158void AliITStrackV2::SetSampledEdx(Float_t q, Int_t i) {
159 //----------------------------------------------------------------------
160 // This function stores dEdx sample corrected for the track segment length
161 // Origin: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
162 //----------------------------------------------------------------------
163 if (i<0) return;
164 if (i>3) return;
165 Double_t s=GetSnp(), t=GetTgl();
166 q *= TMath::Sqrt((1-s*s)/(1+t*t));
167 fdEdxSample[i]=q;
168}
169#endif
170
171