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
9 ///////////////////////////////////////////////////
10 // Track parameters in ALICE dimuon spectrometer
11 ///////////////////////////////////////////////////
15 class AliMUONTrackParam : public TObject
18 AliMUONTrackParam(); // Constructor
19 virtual ~AliMUONTrackParam(){} // Destructor
21 AliMUONTrackParam(const AliMUONTrackParam& rhs);// copy constructor (should be added per default !)
22 AliMUONTrackParam& operator=(const AliMUONTrackParam& rhs);// (should be added per default !)
23 // Get and Set methods for data
24 Double_t GetInverseBendingMomentum(void) const {return fInverseBendingMomentum;}
25 void SetInverseBendingMomentum(Double_t InverseBendingMomentum) {fInverseBendingMomentum = InverseBendingMomentum;}
26 Double_t GetBendingSlope(void) const {return fBendingSlope;}
27 void SetBendingSlope(Double_t BendingSlope) {fBendingSlope = BendingSlope;}
28 Double_t GetNonBendingSlope(void) const {return fNonBendingSlope;}
29 void SetNonBendingSlope(Double_t NonBendingSlope) {fNonBendingSlope = NonBendingSlope;}
30 Double_t GetZ(void) const {return fZ;}
31 void SetZ(Double_t Z) {fZ = Z;}
32 Double_t GetBendingCoor(void) const {return fBendingCoor;}
33 void SetBendingCoor(Double_t BendingCoor) {fBendingCoor = BendingCoor;}
34 Double_t GetNonBendingCoor(void) const {return fNonBendingCoor;}
35 void SetNonBendingCoor(Double_t NonBendingCoor) {fNonBendingCoor = NonBendingCoor;}
36 Double_t Px(); // return px
37 Double_t Py(); // return py
38 Double_t Pz(); // return pz
39 Double_t P(); // return total momentum
41 void ExtrapToZ(Double_t Z);
42 void ExtrapToStation(Int_t Station, AliMUONTrackParam *TrackParam);
43 void ExtrapToVertex(Double_t xVtx, Double_t yVtx, Double_t zVtx); // extrapolation to vertex through the absorber (with true vertex)
44 void BransonCorrection(Double_t xVtx, Double_t yVtx, Double_t zVtx); // makes Branson correction with true vertex
45 // returns total momentum after energy loss correction in the absorber
46 Double_t TotalMomentumEnergyLoss(Double_t thetaLimit, Double_t pTotal, Double_t theta);
47 void FieldCorrection(Double_t Z); // makes simple magnetic field correction through the absorber
49 void ExtrapOneStepHelix(Double_t charge, Double_t step,
50 Double_t *vect, Double_t *vout) const;
51 void ExtrapOneStepHelix3(Double_t field, Double_t step,
52 Double_t *vect, Double_t *vout) const;
54 void ExtrapOneStepRungekutta(Double_t charge, Double_t step,
55 Double_t* vect, Double_t* vout) const;
58 Double_t fInverseBendingMomentum; // Inverse bending momentum (GeV/c ** -1) times the charge (assumed forward motion)
59 Double_t fBendingSlope; // Bending slope (cm ** -1)
60 Double_t fNonBendingSlope; // Non bending slope (cm ** -1)
61 Double_t fZ; // Z coordinate (cm)
62 Double_t fBendingCoor; // bending coordinate (cm)
63 Double_t fNonBendingCoor; // non bending coordinate (cm)
65 void SetGeant3Parameters(Double_t *VGeant3, Double_t ForwardBackward);
66 void GetFromGeant3Parameters(Double_t *VGeant3, Double_t Charge);
68 void GetField(Double_t *Position, Double_t *Field) const;
70 ClassDef(AliMUONTrackParam, 1) // Track parameters in ALICE dimuon spectrometer