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