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1 | #ifndef ALIESDV0_H |
2 | #define ALIESDV0_H |
3 | |
4 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * |
5 | * See cxx source for full Copyright notice */ |
6 | |
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7 | /* $Id$ */ |
8 | |
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9 | //------------------------------------------------------------------------- |
10 | // ESD V0 Vertex Class |
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11 | // This class is part of the Event Summary Data set of classes |
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12 | // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch |
13 | //------------------------------------------------------------------------- |
14 | |
15 | #include <TObject.h> |
16 | #include <TPDGCode.h> |
17 | |
18 | class AliESDtrack; |
19 | |
20 | class AliESDv0 : public TObject { |
21 | public: |
22 | AliESDv0(); |
23 | |
24 | Double_t ChangeMassHypothesis(Int_t code=kK0Short); |
25 | |
26 | Int_t GetPdgCode() const {return fPdgCode;} |
27 | Double_t GetEffMass() const {return fEffMass;} |
28 | Double_t GetChi2() const {return fChi2;} |
29 | void GetPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const; |
30 | void GetNPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const; |
31 | void GetPPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const; |
32 | void GetXYZ(Double_t &x, Double_t &y, Double_t &z) const; |
33 | Double_t GetD(Double_t x0=0.,Double_t y0=0.,Double_t z0=0.) const; |
34 | Int_t GetNindex() const {return fNidx;} |
35 | Int_t GetPindex() const {return fPidx;} |
36 | |
37 | protected: |
38 | Int_t fPdgCode; // reconstructed V0's type (PDG code) |
39 | Double_t fEffMass; // reconstructed V0's effective mass |
40 | Double_t fChi2; // V0's chi2 value |
41 | Double_t fPos[3]; // V0's position (global) |
42 | Double_t fPosCov[6]; // covariance matrix of the vertex position |
43 | |
44 | Int_t fNidx; // index of the negative daughter |
45 | Double_t fNmom[3]; // momentum of the negative daughter (global) |
46 | Double_t fNmomCov[6]; // covariance matrix of the negative daughter mom. |
47 | |
48 | Int_t fPidx; // index of the positive daughter |
49 | Double_t fPmom[3]; // momentum of the positive daughter (global) |
50 | Double_t fPmomCov[6]; // covariance matrix of the positive daughter mom. |
51 | |
52 | ClassDef(AliESDv0,1) // ESD V0 vertex |
53 | }; |
54 | |
55 | inline |
56 | void AliESDv0::GetNPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const { |
57 | px=fNmom[0]; py=fNmom[1]; pz=fNmom[2]; |
58 | } |
59 | |
60 | inline |
61 | void AliESDv0::GetPPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const { |
62 | px=fPmom[0]; py=fPmom[1]; pz=fPmom[2]; |
63 | } |
64 | |
65 | #endif |
66 | |
67 | |