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1 | #ifndef ALITRACK_H | |
2 | #define ALITRACK_H | |
3 | ||
4 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
5 | * See cxx source for full Copyright notice */ | |
6 | ||
7 | // $Id$ | |
8 | ||
9 | ||
10 | #include "TObject.h" | |
11 | #include "TObjArray.h" | |
12 | #include "TArrayD.h" | |
13 | #include "TArrayI.h" | |
14 | ||
15 | #include "AliSignal.h" | |
16 | #include "AliBoost.h" | |
17 | #include "AliPositionObj.h" | |
18 | ||
19 | class AliTrack : public TNamed,public Ali4Vector | |
20 | { | |
21 | public: | |
22 | AliTrack(); // Default constructor | |
23 | virtual ~AliTrack(); // Destructor | |
24 | AliTrack(const AliTrack& t); // Copy constructor | |
25 | virtual TObject* Clone(const char* name="") const; // Make a deep copy and provide its pointer | |
26 | virtual void Reset(); // Reset all values to 0 | |
27 | void Set4Momentum(Ali4Vector& p); // Set track 4-momentum | |
28 | void Set3Momentum(Ali3Vector& p); // Set track 3-momentum | |
29 | void SetMass(Double_t m,Double_t dm=0); // Set particle mass and error | |
30 | void SetMass(); // Set mass and error to the values of the hyp. with highest prob. | |
31 | void SetCharge(Float_t q); // Set particle charge | |
32 | virtual void Data(TString f="car"); // Print track information for coord. frame f | |
33 | virtual void List(TString f="car"); // Print track and decay level 1 information for coord. frame f | |
34 | virtual void ListAll(TString f="car"); // Print track and all decay level information for coord. frame f | |
35 | Ali3Vector Get3Momentum() const; // Provide track 3-momentum | |
36 | Double_t GetMomentum(); // Provide value of track 3-momentum | |
37 | Double_t GetMass(); // Provide particle mass | |
38 | Float_t GetCharge() const; // Provide particle charge | |
39 | Double_t GetEnergy(); // Provide particle total energy | |
40 | void Decay(Double_t m1,Double_t m2,Double_t thcms,Double_t phicms); // Perform 2-body decay | |
41 | Int_t GetNdecay() const; // Provide number of decay products | |
42 | AliTrack* GetDecayTrack(Int_t j) const; // Access to decay produced track number j | |
43 | void RemoveDecays(); // Remove all the decay products of this track | |
44 | void AddSignal(AliSignal& s); // Relate an AliSignal to this track | |
45 | void RemoveSignal(AliSignal& s); // Remove related AliSignal from this track | |
46 | void RemoveSignals(); // Remove all related AliSignals from this track | |
47 | Int_t GetNsignals() const; // Provide number of related AliSignals | |
48 | AliSignal* GetSignal(Int_t j) const; // Access to the related AliSignal number j | |
49 | void SetBeginPoint(AliPosition& p); // Set the track begin-point | |
50 | AliPosition* GetBeginPoint(); // Provide the track begin-point | |
51 | void SetEndPoint(AliPosition& p); // Set the track end-point | |
52 | AliPosition* GetEndPoint(); // Provide the track end-point | |
53 | void SetReferencePoint(AliPosition& p); // Set the track reference-point for the 3-momentum vector | |
54 | AliPosition* GetReferencePoint(); // Provide the track reference-point for the 3-momentum vector | |
55 | void AddTrackHypothesis(AliTrack& t); // Add track hypothesis | |
56 | void AddTrackHypothesis(Double_t prob,Double_t m,Double_t dm=0); // Add track hypothesis with mass data | |
57 | Int_t GetNhypotheses() const; // Provide number of track hypotheses | |
58 | AliTrack* GetTrackHypothesis(Int_t j=0) const; // Provide the j-th track hypothesis | |
59 | void RemoveTrackHypothesis(AliTrack& t);// Remove the specified track hypothesis | |
60 | void RemoveTrackHypotheses(); // Remove all track hypotheses | |
61 | Double_t GetPt(); // Provide trans. momentum w.r.t. z-axis | |
62 | Double_t GetPl(); // Provide long. momentum w.r.t. z-axis | |
63 | Double_t GetEt(); // Provide trans. energy w.r.t. z-axis | |
64 | Double_t GetEl(); // Provide long. energy w.r.t. z-axis | |
65 | Double_t GetMt(); // Provide trans. mass w.r.t. z-axis | |
66 | Double_t GetRapidity(); // Provide rapidity value w.r.t. z-axis | |
67 | void SetImpactPoint(AliPosition& p,TString q); // Set the impact-point in plane "q=0" | |
68 | AliPosition* GetImpactPoint(TString q); // Provide the impact-point in plane "q=0" | |
69 | void SetId(Int_t id); // Set the user defined unique track identifier | |
70 | Int_t GetId() const; // Provide the user defined unique track identifier | |
71 | void SetClosestPoint(AliPosition& p); // Set position p as point of closest approach w.r.t. some reference | |
72 | AliPosition* GetClosestPoint(); // Provide point of closest approach w.r.t. some reference | |
73 | void SetChi2(Float_t chi2); // Set the chi-squared value of the track fit | |
74 | void SetNdf(Int_t ndf); // Set the number of degrees of freedom for the track fit | |
75 | Float_t GetChi2() const; // Provide the chi-squared value of the track fit | |
76 | Int_t GetNdf() const; // Provide the number of degrees of freedom for the track fit | |
77 | void SetParticleCode(Int_t code); // Set the user defined particle id code (e.g. the PDF convention) | |
78 | Int_t GetParticleCode() const; // Provide the user defined particle id code | |
79 | void SetParentTrack(AliTrack* t); // Set pointer to the parent track | |
80 | AliTrack* GetParentTrack(); // Provide pointer to the parent track | |
81 | void SetProb(Double_t prob); // Set the hypothesis probability for this track | |
82 | Float_t GetProb() const; // Provide the hypothesis probability for this track | |
83 | ||
84 | ||
85 | protected: | |
86 | void Init(); // Initialisation of pointers etc... | |
87 | Float_t fQ; // The charge of the particle | |
88 | TObjArray* fDecays; // The array of decay produced tracks | |
89 | TObjArray* fSignals; // The array of related AliSignals | |
90 | TObjArray* fHypotheses; // The array of track hypotheses | |
91 | AliPositionObj* fBegin; // The begin-point of the track | |
92 | AliPositionObj* fEnd; // The end-point of the track | |
93 | AliPositionObj* fRef; // The reference-point of the track for the 3-momentum vector | |
94 | AliPositionObj* fImpactXY; // The (extrapolated) impact-point in the plane z=0 | |
95 | AliPositionObj* fImpactXZ; // The (extrapolated) impact-point in the plane y=0 | |
96 | AliPositionObj* fImpactYZ; // The (extrapolated) impact-point in the plane x=0 | |
97 | Int_t fUserId; // The user defined identifier | |
98 | AliPositionObj* fClosest; // The (extrapolated) point of closest approach w.r.t some reference | |
99 | Float_t fChi2; // The Chi-squared of the track fit | |
100 | Int_t fNdf; // The number of degrees of freedom of the track fit | |
101 | Int_t fCode; // The user defined particle id code | |
102 | AliTrack* fParent; // Pointer to the parent track | |
103 | Float_t fProb; // Probability for this track as a hypothesis | |
104 | ||
105 | private: | |
106 | void Dumps(AliTrack* t,Int_t n,TString f); // Recursively print all decay levels | |
107 | ||
108 | ClassDef(AliTrack,12) // Handling of the attributes of a reconstructed particle track. | |
109 | }; | |
110 | #endif |