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 <TObjArray.h>
20 class AliMUONVCluster;
21 class AliMUONObjectPair;
22 class AliMUONTrackParam;
24 class AliMUONTrack : public TObject
27 AliMUONTrack(); // Default constructor
28 AliMUONTrack(AliMUONObjectPair *segment, Double_t bendingVertexDispersion); // Constructor from a segment
29 virtual ~AliMUONTrack(); // Destructor
30 AliMUONTrack (const AliMUONTrack& track); // copy constructor
31 AliMUONTrack& operator=(const AliMUONTrack& track); // assignment operator
35 TObjArray* GetTrackParamAtCluster() const;
36 void AddTrackParamAtCluster(const AliMUONTrackParam &trackParam, AliMUONVCluster &cluster, Bool_t copy = kFALSE);
37 void RemoveTrackParamAtCluster(AliMUONTrackParam *trackParam);
38 Bool_t UpdateTrackParamAtCluster();
39 Bool_t UpdateCovTrackParamAtCluster();
41 Bool_t IsValid(UInt_t requestedStationMask, Bool_t request2ChInSameSt45 = kFALSE);
43 void TagRemovableClusters(UInt_t requestedStationMask);
45 /// return the number of clusters attached to the track
46 Int_t GetNClusters() const {return fTrackParamAtCluster ? fTrackParamAtCluster->GetEntriesFast() : 0;}
48 /// return kTrue if the vertex must be used to constrain the fit, kFalse if not
49 Bool_t FitWithVertex() const {return fFitWithVertex;}
50 /// set the flag telling whether the vertex must be used to constrain the fit or not
51 void FitWithVertex(Bool_t fitWithVertex) { fFitWithVertex = fitWithVertex; }
52 /// return the vertex resolution square used during the tracking procedure
53 void GetVertexErrXY2(Double_t &nonBendingErr2, Double_t &bendingErr2) const
54 { nonBendingErr2 = fVertexErrXY2[0]; bendingErr2 = fVertexErrXY2[1]; }
55 /// set the vertex resolution square used during the tracking procedure
56 void SetVertexErrXY2(Double_t nonBendingErr2, Double_t bendingErr2)
57 { fVertexErrXY2[0] = nonBendingErr2; fVertexErrXY2[1] = bendingErr2; }
59 /// return kTrue if the multiple scattering must be accounted for in the fit, kFalse if not
60 Bool_t FitWithMCS() const {return fFitWithMCS;}
61 /// set the flag telling whether the multiple scattering must be accounted for in the fit or not
62 void FitWithMCS(Bool_t fitWithMCS) {fFitWithMCS = fitWithMCS;}
64 Bool_t ComputeClusterWeights(TMatrixD* mcsCovariances = 0);
65 Bool_t ComputeLocalChi2(Bool_t accountForMCS);
66 Double_t ComputeGlobalChi2(Bool_t accountForMCS);
68 /// return the minimum value of the function minimized by the fit
69 Double_t GetGlobalChi2() const {return fGlobalChi2;}
70 /// set the minimum value of the function minimized by the fit
71 void SetGlobalChi2(Double_t chi2) { fGlobalChi2 = chi2;}
73 /// return kTRUE if the track has been improved
74 Bool_t IsImproved() const {return fImproved;}
75 /// set the flag telling whether the track has been improved or not
76 void SetImproved(Bool_t improved) { fImproved = improved;}
78 /// return 1,2,3 if track matches with trigger track, 0 if not
79 Int_t GetMatchTrigger(void) const {return fMatchTrigger;}
80 /// returns the local trigger number corresponding to the trigger track (obsolete)
81 Int_t GetLoTrgNum(void) const {return LoCircuit();}
82 /// set the flag telling whether track matches with trigger track or not
83 void SetMatchTrigger(Int_t matchTrigger) {fMatchTrigger = matchTrigger;}
84 /// return the chi2 of trigger/track matching
85 Double_t GetChi2MatchTrigger(void) const {return fChi2MatchTrigger;}
86 /// set the chi2 of trigger/track matching
87 void SetChi2MatchTrigger(Double_t chi2MatchTrigger) {fChi2MatchTrigger = chi2MatchTrigger;}
89 Int_t ClustersInCommon(AliMUONTrack* track, Int_t stMin = 0, Int_t stMax = 4) const;
92 Double_t GetNormalizedChi2() const;
94 Int_t FindCompatibleClusters(const AliMUONTrack &track, Double_t sigma2Cut, Bool_t compatibleCluster[10]) const;
95 Bool_t Match(AliMUONTrack &track, Double_t sigma2Cut, Int_t &nMatchClusters) const;
97 /// return pointer to track parameters at vertex (can be 0x0)
98 AliMUONTrackParam* GetTrackParamAtVertex() const {return fTrackParamAtVertex;}
99 void SetTrackParamAtVertex(const AliMUONTrackParam* trackParam);
101 /// set word telling which trigger chambers where hit by track
102 UShort_t GetHitsPatternInTrigCh() const {return fHitsPatternInTrigCh;}
103 /// set word telling which trigger chambers where hit by track
104 void SetHitsPatternInTrigCh(UShort_t hitsPatternInTrigCh) {fHitsPatternInTrigCh = hitsPatternInTrigCh;}
106 /// set local trigger information for the matched trigger track
107 void SetLocalTrigger(Int_t loCirc, Int_t loStripX, Int_t loStripY, Int_t loDev, Int_t loLpt, Int_t loHpt, UChar_t respWithoutChamber=0);
108 /// return local trigger information for the matched trigger track
109 Int_t GetLocalTrigger(void) const { return fLocalTrigger; }
110 /// number of triggering circuit
111 Int_t LoCircuit(void) const { return fLocalTrigger & 0xFF; }
112 /// x-strip local trigger
113 Int_t LoStripX(void) const { return fLocalTrigger >> 8 & 0x1F; }
114 /// y-strip local trigger
115 Int_t LoStripY(void) const { return fLocalTrigger >> 13 & 0x0F; }
116 /// deviation local trigger
117 Int_t LoDev(void) const { return fLocalTrigger >> 17 & 0x1F; }
118 /// low pt decision local trigger
119 Int_t LoLpt(void) const { return fLocalTrigger >> 22 & 0x03; }
120 /// high pt decision local trigger
121 Int_t LoHpt(void) const { return fLocalTrigger >> 24 & 0x03; }
122 /// Word stating if trigger would be fired without one chamber
123 Int_t GetTriggerWithoutChamber(void) const { return fLocalTrigger >> 26 & 0xF; }
124 /// Check if trigger would be fired without chamber (ich [0,3])
125 Bool_t TriggerFiredWithoutChamber(Int_t ich) const { return GetTriggerWithoutChamber() >> (3 - ich) & 0x1; }
128 /// set the corresponding MC track number
129 void SetMCLabel(Int_t label) {fTrackID = label;}
130 /// return the corresponding MC track number
131 Int_t GetMCLabel() const {return fTrackID;}
133 void RecursiveDump(void) const; // Recursive dump (with associated clusters)
135 virtual void Print(Option_t* opt="") const;
137 virtual void Clear(Option_t* opt="");
139 /// return the maximum chi2 above which the track can be considered as abnormal (due to extrapolation failure, ...)
140 static Double_t MaxChi2() {return fgkMaxChi2;}
142 /// set the flag which is kTRUE if that track shares cluster(s) with another
143 void Connected(Bool_t flag = kTRUE) {fConnected = flag;}
144 /// return the flag which is kTRUE if that track shares cluster(s) with another
145 Bool_t IsConnected() const {return fConnected;}
150 static const Double_t fgkMaxChi2; ///< maximum chi2 above which the track can be considered as abnormal
152 mutable TObjArray* fTrackParamAtCluster; ///< Track parameters at cluster
154 Bool_t fFitWithVertex; //!< kTRUE if using the vertex to constrain the fit, kFALSE if not
155 Double_t fVertexErrXY2[2]; //!< Vertex resolution square used during the tracking procedure if required
157 Bool_t fFitWithMCS; //!< kTRUE if accounting for multiple scattering in the fit, kFALSE if not
159 TMatrixD* fClusterWeightsNonBending; //!< weights matrix, in non bending direction, of clusters attached to the track
160 //!< (accounting for multiple scattering and cluster resolution)
161 TMatrixD* fClusterWeightsBending; //!< weights matrix, in bending direction, of clusters attached to the track
162 //!< (accounting for multiple scattering and cluster resolution)
164 Double_t fGlobalChi2; ///< Global chi2 of the track
166 Bool_t fImproved; //!< kTRUE if the track has been improved
168 Int_t fMatchTrigger; ///< 0 track does not match trigger
169 ///< 1 track match but does not pass pt cut
170 ///< 2 track match Low pt cut
171 ///< 3 track match High pt cut
172 Double_t fChi2MatchTrigger; ///< chi2 of trigger/track matching
174 Int_t fTrackID; ///< Point to the corresponding MC track
176 AliMUONTrackParam* fTrackParamAtVertex; //!< Track parameters at vertex
178 UShort_t fHitsPatternInTrigCh; ///< Word containing info on the hits left in trigger chambers
180 Int_t fLocalTrigger; ///< packed local trigger information
182 Bool_t fConnected; ///< kTRUE if that track shares cluster(s) with another
185 Bool_t ComputeClusterWeights(TMatrixD& clusterWeightsNB, TMatrixD& clusterWeightsB,
186 TMatrixD* mcsCovariances = 0, const AliMUONVCluster* discardedCluster = 0) const;
187 void ComputeMCSCovariances(TMatrixD& mcsCovariances) const;
190 ClassDef(AliMUONTrack, 10) // Reconstructed track in ALICE dimuon spectrometer