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1 | #ifndef ALIMUONTRACKEXTRAP_H |
2 | #define ALIMUONTRACKEXTRAP_H |
3 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * |
4 | * See cxx source for full Copyright notice */ |
5 | |
6 | /*$Id$*/ |
7 | // Revision of includes 07/05/2004 |
8 | |
9 | /// \ingroup rec |
10 | /// \class AliMUONTrackExtrap |
11 | /// \brief Track parameters in ALICE dimuon spectrometer |
12 | /// |
13 | ////////////////////////////////////////////////////////////// |
14 | /// Tools for track extrapolation in ALICE dimuon spectrometer |
15 | ////////////////////////////////////////////////////////////// |
16 | |
17 | #include <TObject.h> |
18 | |
19 | class AliMagF; |
20 | class AliMUONTrackParam; |
21 | |
22 | class AliMUONTrackExtrap : public TObject |
23 | { |
24 | public: |
25 | /// Constructor |
26 | AliMUONTrackExtrap() : TObject(){}; |
27 | /// Destructor |
28 | virtual ~AliMUONTrackExtrap(){}; |
29 | |
30 | /// set field map |
31 | static void SetField(const AliMagF* magField) {fgkField = magField;} |
32 | |
33 | static void ExtrapToZ(AliMUONTrackParam *trackParam, Double_t Z); |
34 | static void ExtrapToStation(AliMUONTrackParam *trackParamIn, Int_t station, AliMUONTrackParam *trackParamOut); |
35 | static void ExtrapToVertex(AliMUONTrackParam *trackParam, Double_t xVtx, Double_t yVtx, Double_t zVtx); |
36 | |
37 | static void ExtrapOneStepRungekutta(Double_t charge, Double_t step, Double_t* vect, Double_t* vout); |
38 | |
39 | |
40 | private: |
41 | static const AliMagF* fgkField; //!< field map |
42 | |
43 | // Functions |
44 | AliMUONTrackExtrap(const AliMUONTrackExtrap& trackExtrap); |
45 | AliMUONTrackExtrap& operator=(const AliMUONTrackExtrap& trackExtrap); |
46 | |
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47 | static void ConvertTrackParamForExtrap(AliMUONTrackParam* trackParam, Double_t *v3, Double_t forwardBackward); |
48 | static void RecoverTrackParam(Double_t *v3, Double_t Charge, AliMUONTrackParam* trackParam); |
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49 | |
50 | static void BransonCorrection(AliMUONTrackParam *trackParam, Double_t xVtx, Double_t yVtx, Double_t zVtx); |
51 | static Double_t TotalMomentumEnergyLoss(Double_t thetaLimit, Double_t pTotal, Double_t theta); |
52 | static void FieldCorrection(AliMUONTrackParam *trackParam, Double_t Z); |
53 | |
54 | static void ExtrapOneStepHelix(Double_t charge, Double_t step, Double_t *vect, Double_t *vout); |
55 | static void ExtrapOneStepHelix3(Double_t field, Double_t step, Double_t *vect, Double_t *vout); |
56 | |
57 | static void GetField(Double_t *Position, Double_t *Field); |
58 | |
59 | ClassDef(AliMUONTrackExtrap, 0) // Tools for track extrapolation in ALICE dimuon spectrometer |
60 | }; |
61 | |
62 | #endif |