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d88f97cc | 1 | #ifndef ALITRACK_H |
2 | #define ALITRACK_H | |
959fbac5 | 3 | |
3da30618 | 4 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * |
5 | * See cxx source for full Copyright notice */ | |
6 | ||
f531a546 | 7 | // $Id$ |
3da30618 | 8 | |
959fbac5 | 9 | |
d88f97cc | 10 | #include "TObject.h" |
11 | #include "TObjArray.h" | |
f531a546 | 12 | #include "TArrayD.h" |
d88f97cc | 13 | |
959fbac5 | 14 | #include "AliSignal.h" |
d88f97cc | 15 | #include "AliBoost.h" |
c72198f1 | 16 | #include "AliPositionObj.h" |
d88f97cc | 17 | |
18 | class AliTrack : public TObject,public Ali4Vector | |
19 | { | |
20 | public: | |
c72198f1 | 21 | AliTrack(); // Default constructor |
22 | virtual ~AliTrack(); // Destructor | |
23 | AliTrack(AliTrack& t); // Copy constructor | |
24 | void Reset(); // Reset all values to 0 | |
25 | void Set4Momentum(Ali4Vector& p); // Set track 4-momentum | |
26 | void Set3Momentum(Ali3Vector& p); // Set track 3-momentum | |
959fbac5 | 27 | void SetMass(Double_t m,Double_t dm=0); // Set particle mass and error |
c72198f1 | 28 | void SetMass(); // Set mass and error to mass hypothesis with highest prob. |
29 | void SetCharge(Float_t q); // Set particle charge | |
30 | void Data(TString f="car"); // Print track information for coord. frame f | |
31 | void List(TString f="car"); // Print track and decay level 1 information for coord. frame f | |
32 | void ListAll(TString f="car"); // Print track and all decay level information for coord. frame f | |
33 | Ali3Vector Get3Momentum(); // Provide track 3-momentum | |
34 | Double_t GetMomentum(); // Provide value of track 3-momentum | |
35 | Double_t GetMass(); // Provide particle mass | |
36 | Float_t GetCharge(); // Provide particle charge | |
37 | Double_t GetEnergy(); // Provide particle total energy | |
d88f97cc | 38 | void Decay(Double_t m1,Double_t m2,Double_t thcms,Double_t phicms); // Perform 2-body decay |
c72198f1 | 39 | Int_t GetNdecay(); // Provide number of decay products |
40 | AliTrack* GetDecayTrack(Int_t j); // Access to decay produced track number j | |
41 | void AddSignal(AliSignal& s); // Relate an AliSignal to this track | |
42 | void RemoveSignal(AliSignal& s); // Remove related AliSignal from this track | |
43 | Int_t GetNsignals(); // Provide number of related AliSignals | |
44 | AliSignal* GetSignal(Int_t j); // Access to the related AliSignal number j | |
45 | void SetBeginPoint(AliPosition& p); // Set the track begin-point | |
46 | AliPosition* GetBeginPoint(); // Provide the track begin-point | |
47 | void SetEndPoint(AliPosition& p); // Set the track end-point | |
48 | AliPosition* GetEndPoint(); // Provide the track end-point | |
f531a546 | 49 | void AddMassHypothesis(Double_t prob,Double_t m,Double_t dm=0); // Add mass hypothesis data |
50 | Int_t GetNMassHypotheses(); // Provide number of mass hypotheses | |
51 | Double_t GetMassHypothesis(Int_t j=0); // Provide mass of jth hypothesis | |
52 | Double_t GetMassHypothesisProb(Int_t j=0); // Provide prob. of jth mass hypothesis | |
53 | void RemoveMassHypothesis(Int_t j); // Remove the jth mass hypothesis | |
c72198f1 | 54 | Double_t GetPt(); // Provide trans. momentum w.r.t. z-axis |
55 | Double_t GetPl(); // Provide long. momentum w.r.t. z-axis | |
56 | Double_t GetEt(); // Provide trans. energy w.r.t. z-axis | |
57 | Double_t GetEl(); // Provide long. energy w.r.t. z-axis | |
58 | Double_t GetMt(); // Provide trans. mass w.r.t. z-axis | |
59 | Double_t GetMt(Int_t j); // Provide trans. mass w.r.t. z-axis and jth mass hypothesis | |
60 | Double_t GetRapidity(); // Provide rapidity value w.r.t. z-axis | |
61 | void SetImpactPoint(AliPosition& p,TString q); // Set the impact-point in plane "q=0" | |
62 | AliPosition* GetImpactPoint(TString q); // Provide the impact-point in plane "q=0" | |
63 | void SetId(Int_t id); // Set the user defined unique track identifier | |
64 | Int_t GetId(); // Provide the user defined unique track identifier | |
65 | void SetClosestPoint(AliPosition& p); // Set position p as point of closest approach w.r.t. some reference | |
66 | AliPosition* GetClosestPoint(); // Provide point of closest approach w.r.t. some reference | |
67 | void SetChi2(Float_t chi2); // Set the chi-squared value of the track fit | |
68 | void SetNdf(Int_t ndf); // Set the number of degrees of freedom for the track fit | |
69 | Float_t GetChi2(); // Provide the chi-squared value of the track fit | |
70 | Int_t GetNdf(); // Provide the number of degrees of freedom for the track fit | |
71 | void SetParticleCode(Int_t code); // Set the user defined particle id code (e.g. the PDF convention) | |
72 | Int_t GetParticleCode(); // Provide the user defined particle id code | |
1fbffa23 | 73 | void SetParentTrack(AliTrack* t); // Set pointer to the parent track |
74 | AliTrack* GetParentTrack(); // Provide pointer to the parent track | |
2693cb4e | 75 | |
d88f97cc | 76 | |
77 | protected: | |
c72198f1 | 78 | void Init(); // Initialisation of pointers etc... |
79 | Float_t fQ; // The charge of the particle | |
80 | Int_t fNdec; // The number of decay products | |
81 | TObjArray* fDecays; // The array of decay produced tracks | |
82 | Int_t fNsig; // The number of related AliSignals | |
83 | TObjArray* fSignals; // The array of related AliSignals | |
84 | AliPositionObj* fBegin; // The begin-point of the track | |
85 | AliPositionObj* fEnd; // The end-point of the track | |
86 | Int_t fNmasses; // The number of mass hypotheses | |
87 | TArrayD* fMasses; // The various mass hypotheses | |
88 | TArrayD* fDmasses; // The errors on the various masses | |
89 | TArrayD* fPmasses; // The probabilities of the various mass hypotheses | |
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 | |
1fbffa23 | 98 | AliTrack* fParent; // Pointer to the parent track |
d88f97cc | 99 | |
100 | private: | |
101 | void Dump(AliTrack* t,Int_t n,TString f); // Recursively print all decay levels | |
102 | ||
1fbffa23 | 103 | ClassDef(AliTrack,5) // Handling of the attributes of a reconstructed particle track. |
d88f97cc | 104 | }; |
105 | #endif |