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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 | ||
14 | #include "AliSignal.h" | |
15 | #include "AliBoost.h" | |
16 | #include "AliPosition.h" | |
17 | ||
18 | class AliTrack : public TObject,public Ali4Vector | |
19 | { | |
20 | public: | |
21 | AliTrack(); // Default constructor | |
22 | ~AliTrack(); // Destructor | |
23 | void Reset(); // Reset all values to 0 | |
24 | void Set4Momentum(Ali4Vector& p); // Set track 4-momentum | |
25 | void Set3Momentum(Ali3Vector& p); // Set track 3-momentum | |
26 | void SetMass(Double_t m,Double_t dm=0); // Set particle mass and error | |
27 | void SetMass(); // Set mass and error to mass hypothesis with highest prob. | |
28 | void SetCharge(Float_t q); // Set particle charge | |
29 | void Info(TString f="car"); // Print track information for coord. frame f | |
30 | void List(TString f="car"); // Print track and decay level 1 information for coord. frame f | |
31 | void ListAll(TString f="car"); // Print track and all decay level information for coord. frame f | |
32 | Ali3Vector Get3Momentum(); // Provide track 3-momentum | |
33 | Double_t GetMomentum(); // Provide value of track 3-momentum | |
34 | Double_t GetMass(); // Provide particle mass | |
35 | Float_t GetCharge(); // Provide particle charge | |
36 | Double_t GetEnergy(); // Provide particle total energy | |
37 | void Decay(Double_t m1,Double_t m2,Double_t thcms,Double_t phicms); // Perform 2-body decay | |
38 | Int_t GetNdecay(); // Provide number of decay products | |
39 | AliTrack* GetDecayTrack(Int_t j); // Access to decay produced track number j | |
40 | void AddSignal(AliSignal& s); // Relate an AliSignal to this track | |
41 | void RemoveSignal(AliSignal& s); // Remove related AliSignal from this track | |
42 | Int_t GetNsignals(); // Provide number of related AliSignals | |
43 | AliSignal* GetSignal(Int_t j); // Access to the related AliSignal number j | |
44 | void SetBeginPoint(AliPosition p);// Set the track begin-point | |
45 | AliPosition GetBeginPoint(); // Provide the track begin-point | |
46 | void SetEndPoint(AliPosition p); // Set the track end-point | |
47 | AliPosition GetEndPoint(); // Provide the track end-point | |
48 | void AddMassHypothesis(Double_t prob,Double_t m,Double_t dm=0); // Add mass hypothesis data | |
49 | Int_t GetNMassHypotheses(); // Provide number of mass hypotheses | |
50 | Double_t GetMassHypothesis(Int_t j=0); // Provide mass of jth hypothesis | |
51 | Double_t GetMassHypothesisProb(Int_t j=0); // Provide prob. of jth mass hypothesis | |
52 | void RemoveMassHypothesis(Int_t j); // Remove the jth mass hypothesis | |
53 | Double_t GetPt(); // Provide trans. momentum w.r.t. z-axis | |
54 | Double_t GetPl(); // Provide long. momentum w.r.t. z-axis | |
55 | Double_t GetEt(); // Provide trans. energy w.r.t. z-axis | |
56 | Double_t GetEl(); // Provide long. energy w.r.t. z-axis | |
57 | Double_t GetMt(); // Provide trans. mass w.r.t. z-axis | |
58 | Double_t GetMt(Int_t j); // Provide trans. mass w.r.t. z-axis and jth mass hypothesis | |
59 | Double_t GetRapidity(); // Provide rapidity value w.r.t. z-axis | |
60 | void SetImpactPoint(AliPosition p,TString q); // Set the impact-point in plane "q=0" | |
61 | AliPosition GetImpactPoint(TString q); // Provide the impact-point in plane "q=0" | |
62 | void SetId(Int_t id); // Set the user defined identifier | |
63 | Int_t GetId(); // Provide the user defined identifier | |
64 | void SetClosestPoint(AliPosition p); // Set position p as point of closest approach w.r.t. some reference | |
65 | AliPosition GetClosestPoint(); // Provide point of closest approach w.r.t. some reference | |
66 | ||
67 | protected: | |
68 | Float_t fQ; // The charge of the particle | |
69 | Int_t fNdec; // The number of decay products | |
70 | TObjArray* fDecays; // The array of decay produced tracks | |
71 | Int_t fNsig; // The number of related AliSignals | |
72 | TObjArray* fSignals; // The array of related AliSignals | |
73 | AliPosition fBegin; // The begin-point of the track | |
74 | AliPosition fEnd; // The end-point of the track | |
75 | Int_t fNmasses; // The number of mass hypotheses | |
76 | TArrayD* fMasses; // The various mass hypotheses | |
77 | TArrayD* fDmasses; // The errors on the various masses | |
78 | TArrayD* fPmasses; // The probabilities of the various mass hypotheses | |
79 | AliPosition fImpactXY; // The (extrapolated) impact-point in the plane z=0 | |
80 | AliPosition fImpactXZ; // The (extrapolated) impact-point in the plane y=0 | |
81 | AliPosition fImpactYZ; // The (extrapolated) impact-point in the plane x=0 | |
82 | Int_t fUserId; // The user defined identifier | |
83 | AliPosition fClosest; // The (extrapolated) point of closest approach w.r.t some reference | |
84 | ||
85 | private: | |
86 | void Dump(AliTrack* t,Int_t n,TString f); // Recursively print all decay levels | |
87 | ||
88 | ClassDef(AliTrack,1) // Handling of the attributes of a reconstructed particle track. | |
89 | }; | |
90 | #endif |