1 #ifndef ALIMUONTRACKPARAM_H
2 #define ALIMUONTRACKPARAM_H
3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
7 // Revision of includes 07/05/2004
10 /// \class AliMUONTrackParam
11 /// \brief Track parameters in ALICE dimuon spectrometer
13 ////////////////////////////////////////////////////
14 /// Track parameters in ALICE dimuon spectrometer
15 ////////////////////////////////////////////////////
18 #include "AliMUONHitForRec.h"
20 class AliESDMuonTrack;
23 class AliMUONTrackParam : public TObject
26 AliMUONTrackParam(); // Constructor
27 virtual ~AliMUONTrackParam(); // Destructor
29 AliMUONTrackParam(const AliMUONTrackParam& theMUONTrackParam);
30 AliMUONTrackParam& operator=(const AliMUONTrackParam& theMUONTrackParam);
32 void GetParamFrom(const AliESDMuonTrack& esdMuonTrack);
33 void SetParamFor(AliESDMuonTrack& esdMuonTrack);
36 // Get and Set methods for data
37 /// return inverse bending momentum (GeV/c ** -1) times the charge (assumed forward motion)
38 Double_t GetInverseBendingMomentum(void) const {return fInverseBendingMomentum;}
39 /// set inverse bending momentum (GeV/c ** -1) times the charge (assumed forward motion)
40 void SetInverseBendingMomentum(Double_t InverseBendingMomentum) {fInverseBendingMomentum = InverseBendingMomentum;}
41 /// return bending slope (cm ** -1)
42 Double_t GetBendingSlope(void) const {return fBendingSlope;}
43 /// set bending slope (cm ** -1)
44 void SetBendingSlope(Double_t BendingSlope) {fBendingSlope = BendingSlope;}
45 /// return non bending slope (cm ** -1)
46 Double_t GetNonBendingSlope(void) const {return fNonBendingSlope;}
47 /// set non bending slope (cm ** -1)
48 void SetNonBendingSlope(Double_t NonBendingSlope) {fNonBendingSlope = NonBendingSlope;}
49 /// return Z coordinate (cm)
50 Double_t GetZ(void) const {return fZ;}
51 /// set Z coordinate (cm)
52 void SetZ(Double_t Z) {fZ = Z;}
53 /// return bending coordinate (cm)
54 Double_t GetBendingCoor(void) const {return fBendingCoor;}
55 /// set bending coordinate (cm)
56 void SetBendingCoor(Double_t BendingCoor) {fBendingCoor = BendingCoor;}
57 /// return non bending coordinate (cm)
58 Double_t GetNonBendingCoor(void) const {return fNonBendingCoor;}
59 /// set non bending coordinate (cm)
60 void SetNonBendingCoor(Double_t NonBendingCoor) {fNonBendingCoor = NonBendingCoor;}
61 void SetTrackParam(AliMUONTrackParam& TrackParam);
62 AliMUONHitForRec* GetHitForRecPtr(void) const;
63 /// set pointeur to associated HitForRec if any
64 void SetHitForRecPtr(AliMUONHitForRec* HitForRec) {fHitForRecPtr = HitForRec;}
66 Double_t Px() const; // return px
67 Double_t Py() const; // return py
68 Double_t Pz() const; // return pz
69 Double_t P() const; // return total momentum
71 /// necessary for sorting TClonesArray of TrackHit's
72 Bool_t IsSortable () const {return kTRUE;}
73 /// "Compare" function for sorting
74 Int_t Compare(const TObject* TrackParam) const;
76 void ExtrapToZ(Double_t Z);
77 void ExtrapToStation(Int_t Station, AliMUONTrackParam *TrackParam);
78 void ExtrapToVertex(Double_t xVtx, Double_t yVtx, Double_t zVtx); // extrapolation to vertex through the absorber (with true vertex)
79 void BransonCorrection(Double_t xVtx, Double_t yVtx, Double_t zVtx); // makes Branson correction with true vertex
80 // returns total momentum after energy loss correction in the absorber
81 Double_t TotalMomentumEnergyLoss(Double_t thetaLimit, Double_t pTotal, Double_t theta);
82 void FieldCorrection(Double_t Z); // makes simple magnetic field correction through the absorber
84 void ExtrapOneStepHelix(Double_t charge, Double_t step,
85 Double_t *vect, Double_t *vout) const;
86 void ExtrapOneStepHelix3(Double_t field, Double_t step,
87 Double_t *vect, Double_t *vout) const;
89 void ExtrapOneStepRungekutta(Double_t charge, Double_t step,
90 Double_t* vect, Double_t* vout) const;
92 virtual void Print(Option_t* opt="") const;
95 void SetField(const AliMagF* magField) {fkField = magField;}
100 Double_t fInverseBendingMomentum; ///< Inverse bending momentum (GeV/c ** -1) times the charge (assumed forward motion)
101 Double_t fBendingSlope; ///< Bending slope (cm ** -1)
102 Double_t fNonBendingSlope; ///< Non bending slope (cm ** -1)
103 Double_t fZ; ///< Z coordinate (cm)
104 Double_t fBendingCoor; ///< bending coordinate (cm)
105 Double_t fNonBendingCoor; ///< non bending coordinate (cm)
107 const AliMagF* fkField; //!< field map
109 void SetGeant3Parameters(Double_t *VGeant3, Double_t ForwardBackward);
110 void GetFromGeant3Parameters(Double_t *VGeant3, Double_t Charge);
112 void GetField(Double_t *Position, Double_t *Field) const;
114 AliMUONHitForRec *fHitForRecPtr; //!< Pointer to associated HitForRec if any
116 ClassDef(AliMUONTrackParam, 2) // Track parameters in ALICE dimuon spectrometer