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006b5f7f | 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 | |
a9a2d814 | 10 | // dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch |
006b5f7f | 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 | ||
83d73500 | 32 | class AliESDtrack; |
006b5f7f | 33 | class AliTPCtrack; |
34 | ||
35 | //_____________________________________________________________________________ | |
8676d691 | 36 | class AliITStrackV2 : public AliKalmanTrack { |
006b5f7f | 37 | public: |
22b13da0 | 38 | AliITStrackV2(); |
006b5f7f | 39 | AliITStrackV2(const AliTPCtrack& t) throw (const Char_t *); |
67c3dcbe | 40 | AliITStrackV2(AliESDtrack& t,Bool_t c=kFALSE) throw (const Char_t *); |
006b5f7f | 41 | AliITStrackV2(const AliITStrackV2& t); |
880f41b9 | 42 | Int_t PropagateToVertex(Double_t d=0., Double_t x0=0.); |
a9a2d814 | 43 | Int_t Propagate(Double_t alpha, Double_t xr); |
44 | Int_t CorrectForMaterial(Double_t d, Double_t x0=21.82); | |
45 | Int_t PropagateTo(Double_t xr, Double_t d, Double_t x0=21.82); | |
7f6ddf58 | 46 | Int_t Update(const AliCluster* cl,Double_t chi2,UInt_t i); |
8676d691 | 47 | Int_t Improve(Double_t x0,Double_t xyz[3],Double_t ers[3]); |
7f6ddf58 | 48 | void SetdEdx(Double_t dedx) {fdEdx=dedx;} |
a9a2d814 | 49 | void SetSampledEdx(Float_t q, Int_t i); |
50 | void CookdEdx(Double_t low=0., Double_t up=0.51); | |
006b5f7f | 51 | void SetDetectorIndex(Int_t i) {SetLabel(i);} |
7f6ddf58 | 52 | void ResetCovariance(); |
53 | void ResetClusters() { SetChi2(0.); SetNumberOfClusters(0); } | |
83d73500 | 54 | void UpdateESDtrack(ULong_t flags); |
67c3dcbe | 55 | void SetConstrainedESDtrack(Double_t chi2); |
006b5f7f | 56 | |
006b5f7f | 57 | Int_t GetDetectorIndex() const {return GetLabel();} |
58 | Double_t GetX() const {return fX;} | |
59 | Double_t GetAlpha()const {return fAlpha;} | |
7f6ddf58 | 60 | Double_t GetdEdx() const {return fdEdx;} |
83d73500 | 61 | Double_t GetPIDsignal() const {return GetdEdx();} |
006b5f7f | 62 | Double_t GetY() const {return fP0;} |
63 | Double_t GetZ() const {return fP1;} | |
64 | Double_t GetSnp() const {return fP2;} | |
65 | Double_t GetTgl() const {return fP3;} | |
67c3dcbe | 66 | Double_t GetC() const {return fP4;} |
77f353c4 | 67 | Double_t |
68 | Get1Pt() const { return (1e-9*TMath::Abs(fP4)/fP4 + fP4)*GetConvConst(); } | |
a6a6f799 | 69 | Double_t GetD(Double_t x=0, Double_t y=0) const; |
006b5f7f | 70 | Double_t GetSigmaY2() const {return fC00;} |
71 | Double_t GetSigmaZ2() const {return fC11;} | |
006b5f7f | 72 | Int_t Compare(const TObject *o) const; |
006b5f7f | 73 | void GetExternalParameters(Double_t& xr, Double_t x[5]) const ; |
74 | void GetExternalCovariance(Double_t cov[15]) const ; | |
006b5f7f | 75 | Int_t GetClusterIndex(Int_t i) const {return fIndex[i];} |
76 | Int_t GetGlobalXYZat(Double_t r,Double_t &x,Double_t &y,Double_t &z) const; | |
006b5f7f | 77 | Double_t GetPredictedChi2(const AliCluster *cluster) const; |
006b5f7f | 78 | Int_t Invariant() const; |
006b5f7f | 79 | |
235b705f | 80 | protected: |
006b5f7f | 81 | Double_t fX; // X-coordinate of this track (reference plane) |
82 | Double_t fAlpha; // rotation angle | |
83 | ||
84 | Double_t fdEdx; // dE/dx | |
85 | ||
86 | Double_t fP0; // Y-coordinate of a track | |
87 | Double_t fP1; // Z-coordinate of a track | |
88 | Double_t fP2; // sine of the track momentum azimuthal angle | |
89 | Double_t fP3; // tangent of the track momentum dip angle | |
90 | Double_t fP4; // track curvature | |
91 | ||
92 | Double_t fC00; // covariance | |
93 | Double_t fC10, fC11; // matrix | |
94 | Double_t fC20, fC21, fC22; // of the | |
95 | Double_t fC30, fC31, fC32, fC33; // track | |
96 | Double_t fC40, fC41, fC42, fC43, fC44; // parameters | |
97 | ||
98 | UInt_t fIndex[kMaxLayer]; // indices of associated clusters | |
99 | ||
a9a2d814 | 100 | Float_t fdEdxSample[4]; // array of dE/dx samples b.b. |
23efe5f1 | 101 | |
83d73500 | 102 | AliESDtrack *fESDtrack; //! pointer to the connected ESD track |
103 | ||
1a947abf | 104 | ClassDef(AliITStrackV2,2) //ITS reconstructed track |
006b5f7f | 105 | }; |
106 | ||
107 | inline | |
108 | void AliITStrackV2::GetExternalParameters(Double_t& xr, Double_t x[5]) const { | |
109 | //--------------------------------------------------------------------- | |
83d73500 | 110 | // This function return external ITS track representation |
006b5f7f | 111 | //--------------------------------------------------------------------- |
112 | xr=fX; | |
113 | x[0]=GetY(); x[1]=GetZ(); x[2]=GetSnp(); x[3]=GetTgl(); x[4]=Get1Pt(); | |
114 | } | |
a9a2d814 | 115 | |
23efe5f1 | 116 | inline |
117 | void AliITStrackV2::SetSampledEdx(Float_t q, Int_t i) { | |
118 | //---------------------------------------------------------------------- | |
a9a2d814 | 119 | // This function stores dEdx sample corrected for the track segment length |
120 | // Origin: Boris Batyunya, JINR, Boris.Batiounia@cern.ch | |
23efe5f1 | 121 | //---------------------------------------------------------------------- |
a9a2d814 | 122 | if (i<0) return; |
123 | if (i>3) return; | |
23efe5f1 | 124 | Double_t s=GetSnp(), t=GetTgl(); |
23efe5f1 | 125 | q *= TMath::Sqrt((1-s*s)/(1+t*t)); |
126 | fdEdxSample[i]=q; | |
23efe5f1 | 127 | } |
006b5f7f | 128 | #endif |
129 | ||
130 |