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e23730c7 | 1 | #ifndef ALIESDCASCADE_H |
2 | #define ALIESDCASCADE_H | |
3 | ||
4 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
5 | * See cxx source for full Copyright notice */ | |
6 | ||
4f679a16 | 7 | /* $Id$ */ |
8 | ||
e23730c7 | 9 | //------------------------------------------------------------------------- |
10 | // ESD Cascade Vertex Class | |
4f679a16 | 11 | // Implementation of the cascade vertex class |
e23730c7 | 12 | // Origin: Christian Kuhn, IReS, Strasbourg, christian.kuhn@ires.in2p3.fr |
13 | //------------------------------------------------------------------------- | |
14 | ||
15 | #include <TObject.h> | |
16 | #include <TPDGCode.h> | |
17 | ||
18 | class AliESDtrack; | |
19 | class AliESDv0; | |
20 | ||
21 | #define kXiMinus 3312 | |
22 | #define kXiPlusBar -3312 | |
23 | #define kOmegaMinus 3334 | |
24 | #define kOmegaPlusBar -3334 | |
25 | ||
26 | class AliESDcascade : public TObject { | |
27 | public: | |
28 | AliESDcascade(); | |
29 | ||
30 | Double_t ChangeMassHypothesis(Double_t &v0q, Int_t code=kXiMinus); | |
31 | ||
32 | Int_t GetPdgCode() const {return fPdgCode;} | |
33 | Double_t GetEffMass() const {return fEffMass;} | |
34 | Double_t GetChi2() const {return fChi2;} | |
35 | void GetPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const; | |
36 | void GetXYZ(Double_t &x, Double_t &y, Double_t &z) const; | |
37 | Double_t GetD(Double_t x0=0.,Double_t y0=0.,Double_t z0=0.) const; | |
38 | ||
39 | void GetNPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const { | |
40 | px=fV0mom[0][0]; py=fV0mom[0][1]; pz=fV0mom[0][2]; | |
41 | } | |
42 | Int_t GetNindex() const {return fV0idx[0];} | |
43 | void GetPPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const { | |
44 | px=fV0mom[1][0]; py=fV0mom[1][1]; pz=fV0mom[1][2]; | |
45 | } | |
46 | Int_t GetPindex() const {return fV0idx[1];} | |
47 | void GetBPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const { | |
48 | px=fBachMom[0]; py=fBachMom[1]; pz=fBachMom[2]; | |
49 | } | |
50 | Int_t GetBindex() const {return fBachIdx;} | |
51 | ||
52 | protected: | |
53 | Int_t fPdgCode; // reconstructed cascade type (PDG code) | |
54 | Double_t fEffMass; // reconstructed cascade effective mass | |
55 | Double_t fChi2; // chi2 value | |
56 | Double_t fPos[3]; // cascade vertex position (global) | |
57 | Double_t fPosCov[6]; // covariance matrix of the vertex position | |
58 | ||
59 | Int_t fV0idx[2]; // indeices of the V0 daughter tracks | |
60 | Double_t fV0mom[2][3]; // V0 daughters' momenta (global) | |
61 | Double_t fV0momCov[6]; // covariance matrix of the V0 momentum. | |
62 | ||
63 | Int_t fBachIdx; // label of the bachelor track | |
64 | Double_t fBachMom[3]; // bachelor momentum (global) | |
65 | Double_t fBachMomCov[6]; // covariance matrix of the bachelor momentum. | |
66 | ||
67 | ClassDef(AliESDcascade,1) // reconstructed cascade vertex | |
68 | }; | |
69 | ||
70 | #endif | |
71 | ||
72 |