SetSolenoidField method to set the L3 field strength. 2 kG is default.
[u/mrichter/AliRoot.git] / TRD / AliTRDtrack.h
CommitLineData
46d29e70 1#ifndef ALITRDTRACK_H
2#define ALITRDTRACK_H
3
4/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice */
6
7#include <TObject.h>
8
9class AliTRDcluster;
10
11class AliTRDtrack : public TObject {
12
13// Represents reconstructed TRD track
14
46d29e70 15public:
16
17 AliTRDtrack() { fN=0;}
18 AliTRDtrack(UInt_t index, const Double_t xx[5],
19 const Double_t cc[15], Double_t xr, Double_t alpha);
20 AliTRDtrack(const AliTRDtrack& t);
21
2a941f4e 22 Int_t Compare(const TObject *o) const;
46d29e70 23
24 Double_t GetAlpha() const {return fAlpha;}
25 Double_t GetC() const {return fC;}
26 Int_t GetClusterIndex(Int_t i) const {return fIndex[i];}
27 Double_t GetChi2() const {return fChi2;}
28 void GetCovariance(Double_t cov[15]) const;
29 Double_t GetdEdX() const {return fdEdx;}
30 Double_t GetEta() const {return fE;}
31 Int_t GetLabel() const {return fLab;}
32 Int_t GetNclusters() const {return fN;}
33 Double_t GetP() const {
34 return TMath::Abs(GetPt())*sqrt(1.+GetTgl()*GetTgl());
35 }
36 Double_t GetPredictedChi2(const AliTRDcluster*) const ;
a2b90f83 37 //Double_t GetPt() const {return 0.3*0.2/GetC()/100;}
38 Double_t GetPt() const {return 0.3*0.4/GetC()/100;}
46d29e70 39 void GetPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const ;
40 Double_t GetSigmaC2() const {return fCcc;}
41 Double_t GetSigmaTgl2() const {return fCtt;}
42 Double_t GetSigmaY2() const {return fCyy;}
43 Double_t GetSigmaZ2() const {return fCzz;}
44 Double_t GetTgl() const {return fT;}
45 Double_t GetX() const {return fX;}
46 Double_t GetY() const {return fY;} // returns running Y
47 Double_t GetZ() const {return fZ;}
48
a2b90f83 49 Float_t GetLikelihoodPion() const { return fLhPion; };
50 Float_t GetLikelihoodElectron() const { return fLhElectron; };
51
46d29e70 52 Bool_t IsSortable() const {return kTRUE;}
53
54 Int_t PropagateTo(Double_t xr,
55 Double_t x0=8.72,Double_t rho=5.86e-3,Double_t pm=0.139);
56 void PropagateToVertex(
57 Double_t x0=36.66,Double_t rho=1.2e-3,Double_t pm=0.139);
58 Int_t Rotate(Double_t angle);
59
60 void SetLabel(Int_t lab=0) {fLab=lab;}
61 void SetdEdx(Float_t dedx) {fdEdx=dedx;}
62
63 void Update(const AliTRDcluster* c, Double_t chi2, UInt_t i);
64
a2b90f83 65 void SetLikelihoodPion(Float_t l) { fLhPion = l; };
66 void SetLikelihoodElectron(Float_t l) { fLhElectron = l; };
bbf92647 67
68protected:
69
70 Int_t fLab; // track label
71 Double_t fChi2; // total chi2 value for the track
72 Float_t fdEdx; // dE/dx
73
74 Double_t fAlpha; // rotation angle
75 Double_t fX; // running local X-coordinate of the track (time bin)
76
77 Double_t fY; // Y-coordinate of the track
78 Double_t fZ; // Z-coordinate of the track
79 Double_t fC; // track curvature
80 Double_t fE; // C*x0
81 Double_t fT; // tangent of the track dip angle
82
83 Double_t fCyy; // covariance
84 Double_t fCzy, fCzz; // matrix
85 Double_t fCcy, fCcz, fCcc; // of the
86 Double_t fCey, fCez, fCec, fCee; // track
87 Double_t fCty, fCtz, fCtc, fCte, fCtt; // parameters
88
89 Short_t fN; // number of clusters associated with the track
90 UInt_t fIndex[200]; // global indexes of these clusters
bbf92647 91
a2b90f83 92 Float_t fLhElectron; // Likelihood to be an electron
93 Float_t fLhPion; // Likelihood to be a pion
94
95 ClassDef(AliTRDtrack,2) // TRD reconstructed tracks
46d29e70 96};
97
98
46d29e70 99#endif