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 AliMUONTrack
11 /// \brief Reconstructed track in ALICE dimuon spectrometer
13 ////////////////////////////////////////////////////
14 /// Reconstructed track in ALICE dimuon spectrometer
15 ////////////////////////////////////////////////////
17 #include "AliMUONTrackParam.h" // object belongs to the class
18 #include <TClonesArray.h>
20 class AliMUONHitForRec;
21 class AliMUONObjectPair;
23 class AliMUONTrack : public TObject
26 AliMUONTrack(); // Default constructor
27 AliMUONTrack(AliMUONObjectPair *segment); // Constructor from a segment
28 virtual ~AliMUONTrack(); // Destructor
29 AliMUONTrack (const AliMUONTrack& track); // copy constructor
30 AliMUONTrack& operator=(const AliMUONTrack& track); // assignment operator
33 /// return pointeur to track parameters at vertex
34 AliMUONTrackParam* GetTrackParamAtVertex() {return &fTrackParamAtVertex;}
35 /// set track parameters at vertex
36 void SetTrackParamAtVertex(const AliMUONTrackParam* trackParam) {fTrackParamAtVertex = *trackParam;}
38 /// return array of track parameters at hit
39 TClonesArray* GetTrackParamAtHit() const {return fTrackParamAtHit;}
40 /// reset array of track parameters at hit
41 void ResetTrackParamAtHit() { fTrackParamAtHit->Delete(); }
42 void AddTrackParamAtHit(const AliMUONTrackParam *trackParam, AliMUONHitForRec *hitForRec);
43 void RemoveTrackParamAtHit(AliMUONTrackParam *trackParam);
44 void UpdateTrackParamAtHit();
45 void UpdateCovTrackParamAtHit();
47 /// return array of hitForRec at hit
48 TClonesArray* GetHitForRecAtHit() const {return fHitForRecAtHit;}
49 /// reset array of hitForRec at hit
50 void ResetHitForRecAtHit() { fHitForRecAtHit->Delete(); }
51 void AddHitForRecAtHit(const AliMUONHitForRec *hitForRec);
53 /// return the number of hits attached to the track
54 Int_t GetNTrackHits() const {return fNTrackHits;}
55 /// set the number of hits attached to the track
56 void SetNTrackHits(Int_t nTrackHits) {fNTrackHits = nTrackHits;}
58 /// return kTrue if the vertex must be used to constrain the fit, kFalse if not
59 Bool_t GetFitWithVertex() const {return fFitWithVertex;}
60 /// set the flag telling whether the vertex must be used to constrain the fit or not
61 void SetFitWithVertex(Bool_t fitWithVertex) { fFitWithVertex = fitWithVertex; }
62 /// return the vertex used during the tracking procedure
63 AliMUONHitForRec* GetVertex() const {return fVertex;}
64 void SetVertex(const AliMUONHitForRec* vertex);
66 /// return kTrue if the multiple scattering must be accounted for in the fit, kFalse if not
67 Bool_t GetFitWithMCS() const {return fFitWithMCS;}
68 /// set the flag telling whether the multiple scattering must be accounted for in the fit or not
69 void SetFitWithMCS(Bool_t fitWithMCS) {fFitWithMCS = fitWithMCS;}
71 Bool_t ComputeHitWeights(TMatrixD* mcsCovariances = 0);
72 Bool_t ComputeLocalChi2(Bool_t accountForMCS);
73 Double_t ComputeGlobalChi2(Bool_t accountForMCS);
75 /// return the minimum value of the function minimized by the fit
76 Double_t GetFitFMin() const {return fGlobalChi2;}
77 /// set the minimum value of the function minimized by the fit
78 void SetFitFMin(Double_t chi2) { fGlobalChi2 = chi2;}
80 /// return kTRUE if the track has been improved
81 Bool_t IsImproved() const {return fImproved;}
82 /// set the flag telling whether the track has been improved or not
83 void SetImproved(Bool_t improved) { fImproved = improved;}
85 /// return 1,2,3 if track matches with trigger track, 0 if not
86 Int_t GetMatchTrigger(void) const {return fMatchTrigger;}
87 /// returns the local trigger number corresponding to the trigger track
88 Int_t GetLoTrgNum(void) const {return floTrgNum;}
89 /// set the flag telling whether track matches with trigger track or not
90 void SetMatchTrigger(Int_t matchTrigger) {fMatchTrigger = matchTrigger;}
91 /// set the local trigger number corresponding to the trigger track
92 void SetLoTrgNum(Int_t loTrgNum) {floTrgNum = loTrgNum;}
93 /// return the chi2 of trigger/track matching
94 Double_t GetChi2MatchTrigger(void) const {return fChi2MatchTrigger;}
95 /// set the chi2 of trigger/track matching
96 void SetChi2MatchTrigger(Double_t chi2MatchTrigger) {fChi2MatchTrigger = chi2MatchTrigger;}
98 Int_t HitsInCommon(AliMUONTrack* track) const;
100 Double_t GetNormalizedChi2() const;
102 Bool_t* CompatibleTrack(AliMUONTrack* track, Double_t sigma2Cut) const; // return array of compatible chamber
104 /// return track number in TrackRefs
105 Int_t GetTrackID() const {return fTrackID;}
106 /// set track number in TrackRefs
107 void SetTrackID(Int_t trackID) {fTrackID = trackID;}
109 /// set word telling which trigger chambers where hit by track
110 UShort_t GetHitsPatternInTrigCh() const {return fHitsPatternInTrigCh;}
111 /// set word telling which trigger chambers where hit by track
112 void SetHitsPatternInTrigCh(UShort_t hitsPatternInTrigCh) {fHitsPatternInTrigCh = hitsPatternInTrigCh;}
114 /// set local trigger information for the matched trigger track
115 void SetLocalTrigger(Int_t loCirc, Int_t loStripX, Int_t loStripY, Int_t loDev, Int_t loLpt, Int_t loHpt);
116 /// return local trigger information for the matched trigger track
117 Int_t GetLocalTrigger(void) const { return fLocalTrigger; }
118 /// number of triggering circuit
119 Int_t LoCircuit(void) const { return fLocalTrigger & 0xFF; }
120 /// x-strip local trigger
121 Int_t LoStripX(void) const { return fLocalTrigger >> 8 & 0x1F; }
122 /// y-strip local trigger
123 Int_t LoStripY(void) const { return fLocalTrigger >> 13 & 0x0F; }
124 /// deviation local trigger
125 Int_t LoDev(void) const { return fLocalTrigger >> 17 & 0x1F; }
126 /// low pt decision local trigger
127 Int_t LoLpt(void) const { return fLocalTrigger >> 22 & 0x03; }
128 /// high pt decision local trigger
129 Int_t LoHpt(void) const { return fLocalTrigger >> 24 & 0x03; }
131 void RecursiveDump(void) const; // Recursive dump (with track hits)
133 virtual void Print(Option_t* opt="") const;
135 virtual void Clear(Option_t* opt="");
140 AliMUONTrackParam fTrackParamAtVertex; //!< Track parameters at vertex
141 TClonesArray *fTrackParamAtHit; ///< Track parameters at hit
142 TClonesArray *fHitForRecAtHit; ///< Cluster parameters at hit
143 Int_t fNTrackHits; ///< Number of hits attached to the track
145 Bool_t fFitWithVertex; //!< kTRUE if using the vertex to constrain the fit, kFALSE if not
146 AliMUONHitForRec *fVertex; //!< Vertex used during the tracking procedure if required
148 Bool_t fFitWithMCS; //!< kTRUE if accounting for multiple scattering in the fit, kFALSE if not
150 TMatrixD* fHitWeightsNonBending; //!< weights matrix, in non bending direction, of hits attached to the track
151 //!< (accounting for multiple scattering and hits resolution)
152 TMatrixD* fHitWeightsBending; //!< weights matrix, in bending direction, of hits attached to the track
153 //!< (accounting for multiple scattering and hits resolution)
155 Double_t fGlobalChi2; ///< Global chi2 of the track
157 Bool_t fImproved; //!< kTRUE if the track has been improved
159 Int_t fMatchTrigger; ///< 0 track does not match trigger
160 ///< 1 track match but does not pass pt cut
161 ///< 2 track match Low pt cut
162 ///< 3 track match High pt cut
163 Int_t floTrgNum; ///< the number of the corresponding loTrg, -1 if no matching
164 Double_t fChi2MatchTrigger; ///< chi2 of trigger/track matching
166 Int_t fTrackID; ///< track ID = track number in TrackRefs
167 UShort_t fHitsPatternInTrigCh; ///< Word containing info on the hits left in trigger chambers
169 Int_t fLocalTrigger; ///< packed local trigger information
173 Bool_t ComputeHitWeights(TMatrixD& hitWeightsNB, TMatrixD& hitWeightsB, TMatrixD* mcsCovariances = 0, AliMUONHitForRec* discardedHit = 0) const;
174 void ComputeMCSCovariances(TMatrixD& mcsCovariances) const;
177 ClassDef(AliMUONTrack, 7) // Reconstructed track in ALICE dimuon spectrometer