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 AliTrackReference;
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 Int_t GetRecTrackRefHits(void) const {return fRecTrackRefHits;}
58 void SetRecTrackRefHits(Int_t RecTrackRefHits) {fRecTrackRefHits = RecTrackRefHits;}
59 Double_t GetEfficiency(void) const {return fEfficiency;}
60 void SetEfficiency(Double_t Efficiency) {fEfficiency = Efficiency;}
61 void SetReconstructionParametersToDefaults(void);
63 // Parameters for Track Ref. background events
64 TFile* GetBkgTrackRefFile(void) const {return fBkgTrackRefFile;}
65 void SetBkgTrackRefFile(Text_t *BkgTrackRefFileName); // set background file for track ref. hits
66 void NextBkgTrackRefEvent(void); // next event in background file for track ref. hits
68 // Hits for reconstruction
69 Int_t GetNHitsForRec(void) const {return fNHitsForRec;} // Number
71 // Reconstructed tracks
72 Int_t GetNRecTracks() const {return fNRecTracks;} // Number
73 void SetNRecTracks(Int_t NRecTracks) {fNRecTracks = NRecTracks;}
74 TClonesArray* GetRecTracksPtr(void) const {return fRecTracksPtr;} // Array
76 // Hits on reconstructed tracks
77 Int_t GetNRecTrackHits() const {return fNRecTrackHits;} // Number
78 void SetNRecTrackHits(Int_t NRecTrackHits) {fNRecTrackHits = NRecTrackHits;}
79 TClonesArray* GetRecTrackHitsPtr(void) const {return fRecTrackHitsPtr;} // Array
82 Double_t GetImpactParamFromBendingMomentum(Double_t BendingMomentum) const;
83 Double_t GetBendingMomentumFromImpactParam(Double_t ImpactParam) const;
84 void EventReconstruct(void);
85 void EventReconstructTrigger(void);
86 void EventDump(void); // dump reconstructed event
87 void EventDumpTrigger(void); // dump reconstructed trigger event
88 //PH void FillEvent(); // fill and write tree of reconstructed events
89 void SetTrackMethod(Int_t iTrackMethod); //AZ
90 Int_t GetTrackMethod(void) const {return fTrackMethod;}
91 void FillMUONTrack(void); // set track parameters at hits for Kalman track
92 //Int_t fMuons; // AZ - number of muons within acceptance - just for tests
94 AliMUONData* GetMUONData() {return fMUONData;}
97 AliMUONTrackReconstructor (const AliMUONTrackReconstructor& rhs); // copy constructor
98 AliMUONTrackReconstructor& operator=(const AliMUONTrackReconstructor& rhs); // assignment operator
102 // Constants which should be elsewhere ????
103 static const Int_t fgkMaxMuonTrackingChambers = 10; // Max number of Muon tracking chambers
104 static const Int_t fgkMaxMuonTrackingStations = 5; // Max number of Muon tracking stations
106 // Defaults parameters for reconstruction
107 static const Double_t fgkDefaultMinBendingMomentum; // default min. bending momentum for reconstruction
108 static const Double_t fgkDefaultMaxBendingMomentum; // default max. bending momentum for reconstruction
109 static const Double_t fgkDefaultMaxChi2; // default max. track chi2 for reconstruction
110 static const Double_t fgkDefaultMaxSigma2Distance; // default square of max. distance for window size
111 static const Double_t fgkDefaultBendingResolution; // default bending coordinate resolution for reconstruction
112 static const Double_t fgkDefaultNonBendingResolution; // default non bending coordinate resolution for reconstruction
113 static const Double_t fgkDefaultChamberThicknessInX0; // default chamber thickness in X0 for reconstruction
114 // Simple magnetic field:
115 // Value taken from macro MUONtracking.C: 0.7 T, hence 7 kG
116 // Length and Position from reco_muon.F, with opposite sign:
117 // Length = ZMAGEND-ZCOIL
118 // Position = (ZMAGEND+ZCOIL)/2
119 // to be ajusted differently from real magnetic field ????
120 static const Double_t fgkDefaultSimpleBValue; // default value of magnetic field (dipole)
121 static const Double_t fgkDefaultSimpleBLength; // default length of magnetic field (dipole)
122 static const Double_t fgkDefaultSimpleBPosition; // default position of magnetic field (dipole)
123 static const Int_t fgkDefaultRecTrackRefHits; // default flag for reconstrution track ref. hits or Clusters
124 static const Double_t fgkDefaultEfficiency; // default chamber efficiency for track ref. hits recontruction
127 Int_t fTrackMethod; // AZ - tracking method
129 // Parameters for track reconstruction
130 Double_t fMinBendingMomentum; // minimum value (GeV/c) of momentum in bending plane
131 // Parameters for track reconstruction
132 Double_t fMaxBendingMomentum; // maximum value (GeV/c) of momentum in bending plane
133 Double_t fMaxChi2; // maximum Chi2 per degree of Freedom
134 Double_t fMaxSigma2Distance; // maximum square distance in units of the variance (maximum chi2)
135 Double_t fRMin[fgkMaxMuonTrackingChambers]; // minimum radius (cm)
136 Double_t fRMax[fgkMaxMuonTrackingChambers]; // maximum radius (cm)
137 Double_t fSegmentMaxDistBending[fgkMaxMuonTrackingStations]; // maximum distance (cm) for segments in bending plane
138 Double_t fSegmentMaxDistNonBending[fgkMaxMuonTrackingStations]; // maximum distance (cm) for segments in non bending plane
139 Double_t fBendingResolution; // chamber resolution (cm) in bending plane
140 Double_t fNonBendingResolution; // chamber resolution (cm) in non bending plane
141 Double_t fChamberThicknessInX0; // chamber thickness in number of radiation lengths
142 // how to take it from simulation ????
143 Double_t fSimpleBValue; // simple magnetic field: value (kG)
144 Double_t fSimpleBLength; // simple magnetic field: length (cm)
145 Double_t fSimpleBPosition; // simple magnetic field: Z central position (cm)
146 Int_t fRecTrackRefHits; // reconstruction from raw clusters (0) or from track ref. hits (1)
147 Double_t fEfficiency; // chamber efficiency (used for track ref. hits only)
149 // Parameters for track ref. background events
150 // should be in AliMUON class ????
151 TFile *fBkgTrackRefFile; // pointer to file
152 TTree *fBkgTrackRefTK; // pointer to tree TK
153 TClonesArray *fBkgTrackRefParticles; // pointer to list of particles in tree TK
154 TTree *fBkgTrackRefTTR; // pointer to tree TTR
155 Int_t fBkgTrackRefEventNumber; // event number
157 // Hits for reconstruction (should be in AliMUON ????)
158 TClonesArray *fHitsForRecPtr; // pointer to the array of hits for reconstruction
159 Int_t fNHitsForRec; // number of hits for reconstruction
160 // Information per chamber (should be in AliMUONChamber ????)
161 Int_t fNHitsForRecPerChamber[fgkMaxMuonTrackingChambers]; // number of HitsForRec
162 Int_t fIndexOfFirstHitForRecPerChamber[fgkMaxMuonTrackingChambers]; // index (0...) of first HitForRec
164 // Segments inside a station
165 TClonesArray *fSegmentsPtr[fgkMaxMuonTrackingStations]; // array of pointers to the segments for each station
166 Int_t fNSegments[fgkMaxMuonTrackingStations]; // number of segments for each station
168 // Reconstructed tracks
169 TClonesArray *fRecTracksPtr; // pointer to array of reconstructed tracks
170 Int_t fNRecTracks; // number of reconstructed tracks
172 // Track hits on reconstructed tracks
173 TClonesArray *fRecTrackHitsPtr; // pointer to array of hits on reconstructed tracks
174 Int_t fNRecTrackHits; // number of hits on reconstructed tracks
177 AliMUONData* fMUONData; // Data container for MUON subsystem
180 AliLoader* fLoader; // MUON loader to get data
182 Int_t fMuons; // AZ - number of muons within acceptance - just for tests
185 void ResetHitsForRec(void);
186 void MakeEventToBeReconstructed(void);
187 void AddHitsForRecFromTrackRef(TTree *TTR, Int_t Signal);
188 AliMUONHitForRec* NewHitForRecFromTrackRef(AliTrackReference* Hit, Int_t TrackNumber, Int_t Signal);
189 TClonesArray *CleanTrackRefs(TTree *treeTR);
190 /* void AddHitsForRecFromCathodeCorrelations(TTree* TC); */
191 void AddHitsForRecFromRawClusters(TTree* TR);
192 void SortHitsForRecWithIncreasingChamber();
193 void MakeSegments(void);
194 void ResetSegments(void);
195 void MakeSegmentsPerStation(Int_t Station);
196 void MakeTracks(void);
197 Bool_t MakeTriggerTracks(void);
198 void ResetTrackHits(void);
199 void ResetTracks(void);
200 Int_t MakeTrackCandidatesWithTwoSegments(AliMUONSegment *BegSegment);
201 Int_t MakeTrackCandidatesWithOneSegmentAndOnePoint(AliMUONSegment *BegSegment);
202 void MakeTrackCandidates(void);
203 void FollowTracks(void);
204 void RemoveDoubleTracks(void);
205 void UpdateTrackParamAtHit(void);
206 void UpdateHitForRecAtHit(void);
207 void ValidateTracksWithTrigger(void);
210 //AZ - for Kalman Filter
211 void MakeTrackCandidatesK(void);
212 void FollowTracksK(void);
213 void RemoveDoubleTracksK(void);
214 void GoToVertex(void);
215 Bool_t CheckCandidateK(Int_t icand, Int_t nSeeds) const;
218 ClassDef(AliMUONTrackReconstructor, 0) // MUON track reconstructor in ALICE