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7f6ddf58 | 1 | #ifndef ALIV0VERTEX_H |
2 | #define ALIV0VERTEX_H | |
3 | ||
4 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
5 | * See cxx source for full Copyright notice */ | |
6 | ||
7 | //------------------------------------------------------------------------- | |
8 | // V0 Vertex Class | |
9 | // | |
10 | // Origin: Iouri Belikov, IReS, Strasbourg, Jouri.Belikov@cern.ch | |
11 | //------------------------------------------------------------------------- | |
12 | ||
13 | #include <TObject.h> | |
14 | #include "AliPDG.h" | |
15 | ||
16 | class AliITStrackV2; | |
17 | ||
18 | class AliV0vertex : public TObject { | |
19 | public: | |
20 | AliV0vertex(); | |
21 | AliV0vertex(const AliITStrackV2 &neg, const AliITStrackV2 &pos); | |
22 | ||
23 | void ChangeMassHypothesis(Int_t code=kLambda0); | |
24 | ||
25 | Int_t GetPdgCode() const {return fPdgCode;} | |
26 | Double_t GetEffMass() const {return fEffMass;} | |
27 | Double_t GetChi2() const {return fChi2;} | |
28 | void GetPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const; | |
4ab260d6 | 29 | void GetNPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const; |
30 | void GetPPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const; | |
7f6ddf58 | 31 | void GetXYZ(Double_t &x, Double_t &y, Double_t &z) const; |
32 | Double_t GetD(Double_t x0=0.,Double_t y0=0.,Double_t z0=0.) const; | |
33 | Int_t GetNlabel() const {return fNlab;} | |
34 | Int_t GetPlabel() const {return fPlab;} | |
35 | ||
36 | private: | |
37 | Int_t fPdgCode; // reconstructed V0's type (PDG code) | |
38 | Double_t fEffMass; // reconstructed V0's effective mass | |
39 | Double_t fChi2; // V0's chi2 value | |
40 | Double_t fPos[3]; // V0's position (global) | |
41 | Double_t fPosCov[6]; // covariance matrix of the vertex position | |
42 | ||
43 | Int_t fNlab; // label of the negative daughter | |
44 | Double_t fNmom[3]; // momentum of the negative daughter (global) | |
45 | Double_t fNmomCov[6]; // covariance matrix of the negative daughter mom. | |
46 | ||
47 | Int_t fPlab; // label of the positive daughter | |
48 | Double_t fPmom[3]; // momentum of the positive daughter (global) | |
49 | Double_t fPmomCov[6]; // covariance matrix of the positive daughter mom. | |
50 | ||
51 | ClassDef(AliV0vertex,1) // reconstructed V0 vertex | |
52 | }; | |
53 | ||
4ab260d6 | 54 | inline |
55 | void AliV0vertex::GetNPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const { | |
56 | px=fNmom[0]; py=fNmom[1]; pz=fNmom[2]; | |
57 | } | |
58 | ||
59 | inline | |
60 | void AliV0vertex::GetPPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const { | |
61 | px=fPmom[0]; py=fPmom[1]; pz=fPmom[2]; | |
62 | } | |
63 | ||
7f6ddf58 | 64 | #endif |
65 | ||
66 |