1 #ifndef ALIMUONTRACKRECONSTRUCTOR_H
2 #define ALIMUONTRACKRECONSTRUCTOR_H
3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
9 /// \class AliMUONTrackReconstructor
10 /// \brief Class for the MUON track reconstruction
12 /////////////////////////////////////
13 /// MUON track reconstructor in ALICE
14 /////////////////////////////////////
17 #include "AliMUONConstants.h"
19 class AliMUONHitForRec;
27 class AliMUONTriggerTrack;
29 class AliMUONTrackReconstructor : public TObject {
32 AliMUONTrackReconstructor(AliLoader* loader, AliMUONData* data); // default Constructor
33 virtual ~AliMUONTrackReconstructor(void); // Destructor
35 // Parameters for track reconstruction: public methods
36 // Get and Set, Set to defaults
37 Double_t GetMinBendingMomentum(void) const {return fMinBendingMomentum;}
38 void SetMinBendingMomentum(Double_t MinBendingMomentum) {fMinBendingMomentum = MinBendingMomentum;}
39 Double_t GetMaxBendingMomentum(void) const {return fMaxBendingMomentum;}
40 void SetMaxBendingMomentum(Double_t MaxBendingMomentum) {fMaxBendingMomentum = MaxBendingMomentum;}
41 Double_t GetMaxChi2(void) const {return fMaxChi2;}
42 void SetMaxChi2(Double_t MaxChi2) {fMaxChi2 = MaxChi2;}
43 Double_t GetMaxSigma2Distance(void) const {return fMaxSigma2Distance;}
44 void SetMaxSigma2Distance(Double_t MaxSigma2Distance) {fMaxSigma2Distance = MaxSigma2Distance;}
45 Double_t GetBendingResolution(void) const {return fBendingResolution;}
46 void SetBendingResolution(Double_t BendingResolution) {fBendingResolution = BendingResolution;}
47 Double_t GetNonBendingResolution(void) const {return fNonBendingResolution;}
48 void SetNonBendingResolution(Double_t NonBendingResolution) {fNonBendingResolution = NonBendingResolution;}
49 Double_t GetChamberThicknessInX0(void) const {return fChamberThicknessInX0;}
50 void SetChamberThicknessInX0(Double_t ChamberThicknessInX0) {fChamberThicknessInX0 = ChamberThicknessInX0;}
51 Double_t GetSimpleBValue(void) const {return fSimpleBValue;}
52 void SetSimpleBValue(Double_t SimpleBValue) {fSimpleBValue = SimpleBValue;}
53 Double_t GetSimpleBLength(void) const {return fSimpleBLength;}
54 void SetSimpleBLength(Double_t SimpleBLength) {fSimpleBLength = SimpleBLength;}
55 Double_t GetSimpleBPosition(void) const {return fSimpleBPosition;}
56 void SetSimpleBPosition(Double_t SimpleBPosition) {fSimpleBPosition = SimpleBPosition;}
57 Double_t GetEfficiency(void) const {return fEfficiency;}
58 void SetEfficiency(Double_t Efficiency) {fEfficiency = Efficiency;}
59 void SetReconstructionParametersToDefaults(void);
61 // Hits for reconstruction
62 Int_t GetNHitsForRec(void) const {return fNHitsForRec;} // Number
64 // Reconstructed tracks
65 Int_t GetNRecTracks() const {return fNRecTracks;} // Number
66 void SetNRecTracks(Int_t NRecTracks) {fNRecTracks = NRecTracks;}
67 TClonesArray* GetRecTracksPtr(void) const {return fRecTracksPtr;} // Array
69 // Hits on reconstructed tracks
70 Int_t GetNRecTrackHits() const {return fNRecTrackHits;} // Number
71 void SetNRecTrackHits(Int_t NRecTrackHits) {fNRecTrackHits = NRecTrackHits;}
72 TClonesArray* GetRecTrackHitsPtr(void) const {return fRecTrackHitsPtr;} // Array
75 Double_t GetImpactParamFromBendingMomentum(Double_t BendingMomentum) const;
76 Double_t GetBendingMomentumFromImpactParam(Double_t ImpactParam) const;
77 void EventReconstruct(void);
78 void EventReconstructTrigger(void);
79 void EventDump(void); // dump reconstructed event
80 void EventDumpTrigger(void); // dump reconstructed trigger event
81 //PH void FillEvent(); // fill and write tree of reconstructed events
82 void SetTrackMethod(Int_t iTrackMethod); //AZ
83 Int_t GetTrackMethod(void) const {return fTrackMethod;}
84 void FillMUONTrack(void); // set track parameters at hits for Kalman track
85 //Int_t fMuons; // AZ - number of muons within acceptance - just for tests
87 AliMUONData* GetMUONData() {return fMUONData;}
91 // Constants which should be elsewhere ????
92 static const Int_t fgkMaxMuonTrackingChambers = 10; ///< Max number of Muon tracking chambers
93 static const Int_t fgkMaxMuonTrackingStations = 5; ///< Max number of Muon tracking stations
95 // Defaults parameters for reconstruction
96 static const Double_t fgkDefaultMinBendingMomentum; ///< default min. bending momentum for reconstruction
97 static const Double_t fgkDefaultMaxBendingMomentum; ///< default max. bending momentum for reconstruction
98 static const Double_t fgkDefaultMaxChi2; ///< default max. track chi2 for reconstruction
99 static const Double_t fgkDefaultMaxSigma2Distance; ///< default square of max. distance for window size
100 static const Double_t fgkDefaultBendingResolution; ///< default bending coordinate resolution for reconstruction
101 static const Double_t fgkDefaultNonBendingResolution; ///< default non bending coordinate resolution for reconstruction
102 static const Double_t fgkDefaultChamberThicknessInX0; ///< default chamber thickness in X0 for reconstruction
103 // Simple magnetic field:
104 // Value taken from macro MUONtracking.C: 0.7 T, hence 7 kG
105 // Length and Position from reco_muon.F, with opposite sign:
106 // Length = ZMAGEND-ZCOIL
107 // Position = (ZMAGEND+ZCOIL)/2
108 // to be ajusted differently from real magnetic field ????
109 static const Double_t fgkDefaultSimpleBValue; ///< default value of magnetic field (dipole)
110 static const Double_t fgkDefaultSimpleBLength; ///< default length of magnetic field (dipole)
111 static const Double_t fgkDefaultSimpleBPosition; ///< default position of magnetic field (dipole)
112 static const Double_t fgkDefaultEfficiency; ///< default chamber efficiency for track ref. hits recontruction
115 Int_t fTrackMethod; ///< AZ - tracking method
117 // Parameters for track reconstruction
118 Double_t fMinBendingMomentum; ///< minimum value (GeV/c) of momentum in bending plane
119 // Parameters for track reconstruction
120 Double_t fMaxBendingMomentum; ///< maximum value (GeV/c) of momentum in bending plane
121 Double_t fMaxChi2; ///< maximum Chi2 per degree of Freedom
122 Double_t fMaxSigma2Distance; ///< maximum square distance in units of the variance (maximum chi2)
123 Double_t fRMin[fgkMaxMuonTrackingChambers]; ///< minimum radius (cm)
124 Double_t fRMax[fgkMaxMuonTrackingChambers]; ///< maximum radius (cm)
125 Double_t fSegmentMaxDistBending[fgkMaxMuonTrackingStations]; ///< maximum distance (cm) for segments in bending plane
126 Double_t fSegmentMaxDistNonBending[fgkMaxMuonTrackingStations]; ///< maximum distance (cm) for segments in non bending plane
127 Double_t fBendingResolution; ///< chamber resolution (cm) in bending plane
128 Double_t fNonBendingResolution; ///< chamber resolution (cm) in non bending plane
129 Double_t fChamberThicknessInX0; ///< chamber thickness in number of radiation lengths
130 // how to take it from simulation ????
131 Double_t fSimpleBValue; ///< simple magnetic field: value (kG)
132 Double_t fSimpleBLength; ///< simple magnetic field: length (cm)
133 Double_t fSimpleBPosition; ///< simple magnetic field: Z central position (cm)
134 Double_t fEfficiency; ///< chamber efficiency (used for track ref. hits only)
136 // Hits for reconstruction (should be in AliMUON ????)
137 TClonesArray *fHitsForRecPtr; ///< pointer to the array of hits for reconstruction
138 Int_t fNHitsForRec; ///< number of hits for reconstruction
139 // Information per chamber (should be in AliMUONChamber ????)
140 Int_t fNHitsForRecPerChamber[fgkMaxMuonTrackingChambers]; ///< number of HitsForRec
141 Int_t fIndexOfFirstHitForRecPerChamber[fgkMaxMuonTrackingChambers]; ///< index (0...) of first HitForRec
143 // Segments inside a station
144 TClonesArray *fSegmentsPtr[fgkMaxMuonTrackingStations]; ///< array of pointers to the segments for each station
145 Int_t fNSegments[fgkMaxMuonTrackingStations]; ///< number of segments for each station
147 // Reconstructed tracks
148 TClonesArray *fRecTracksPtr; ///< pointer to array of reconstructed tracks
149 Int_t fNRecTracks; ///< number of reconstructed tracks
151 // Track hits on reconstructed tracks
152 TClonesArray *fRecTrackHitsPtr; ///< pointer to array of hits on reconstructed tracks
153 Int_t fNRecTrackHits; ///< number of hits on reconstructed tracks
156 AliMUONData* fMUONData; ///< Data container for MUON subsystem
159 AliLoader* fLoader; ///< MUON loader to get data
161 Int_t fMuons; ///< AZ - number of muons within acceptance - just for tests
163 AliMUONTriggerTrack* fTriggerTrack; ///< Trigger track structure
166 AliMUONTrackReconstructor (const AliMUONTrackReconstructor& rhs); // copy constructor
167 AliMUONTrackReconstructor& operator=(const AliMUONTrackReconstructor& rhs); // assignment operator
168 void ResetHitsForRec(void);
169 void MakeEventToBeReconstructed(void);
170 void AddHitsForRecFromRawClusters(TTree* TR);
171 void SortHitsForRecWithIncreasingChamber();
172 void MakeSegments(void);
173 void ResetSegments(void);
174 void MakeSegmentsPerStation(Int_t Station);
175 void MakeTracks(void);
176 Bool_t MakeTriggerTracks(void);
177 void ResetTrackHits(void);
178 void ResetTracks(void);
179 Int_t MakeTrackCandidatesWithTwoSegments(AliMUONSegment *BegSegment);
180 Int_t MakeTrackCandidatesWithOneSegmentAndOnePoint(AliMUONSegment *BegSegment);
181 void MakeTrackCandidates(void);
182 void FollowTracks(void);
183 void RemoveDoubleTracks(void);
184 void UpdateTrackParamAtHit(void);
185 void UpdateHitForRecAtHit(void);
186 void ValidateTracksWithTrigger(void);
189 //AZ - for Kalman Filter
190 void MakeTrackCandidatesK(void);
191 void FollowTracksK(void);
192 void RemoveDoubleTracksK(void);
193 void GoToVertex(void);
194 Bool_t CheckCandidateK(Int_t icand, Int_t nSeeds) const;
197 ClassDef(AliMUONTrackReconstructor, 0) // MUON track reconstructor in ALICE