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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> | |
c028b974 | 17 | #include "AliESDv0.h" |
e23730c7 | 18 | |
c7bafca9 | 19 | class AliExternalTrackParam; |
e23730c7 | 20 | |
e23730c7 | 21 | |
c028b974 | 22 | class AliESDcascade : public AliESDv0 { |
23 | ||
562dd0b4 | 24 | enum { kOmegaPlusBar = -3334, |
25 | kXiPlusBar = -3312, | |
26 | kXiMinus = 3312, | |
27 | kOmegaMinus = 3334}; | |
28 | ||
e23730c7 | 29 | public: |
30 | AliESDcascade(); | |
c028b974 | 31 | AliESDcascade(const AliESDcascade&); |
32 | AliESDcascade(const AliESDv0 &v0, | |
c7bafca9 | 33 | const AliExternalTrackParam &t, Int_t i); |
c028b974 | 34 | ~AliESDcascade(); |
35 | ||
e23730c7 | 36 | Double_t ChangeMassHypothesis(Double_t &v0q, Int_t code=kXiMinus); |
37 | ||
8668c148 | 38 | Int_t GetPdgCodeXi() const {return fPdgCodeXi;} |
39 | Double_t GetEffMassXi() const {return fEffMassXi;} | |
c028b974 | 40 | Double_t GetChi2Xi() const {return fChi2Xi;} |
41 | void GetPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const; | |
42 | void GetXYZcascade(Double_t &x, Double_t &y, Double_t &z) const; | |
43 | Double_t GetDcascade(Double_t x0=0.,Double_t y0=0.,Double_t z0=0.) const; | |
e23730c7 | 44 | |
c028b974 | 45 | void GetBPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const { |
e23730c7 | 46 | px=fBachMom[0]; py=fBachMom[1]; pz=fBachMom[2]; |
47 | } | |
c028b974 | 48 | |
49 | Int_t GetBindex() const {return fBachIdx;} | |
7f68891d | 50 | void SetIndex(Int_t i) {fBachIdx=i;} //for the consistensy with V0 |
51 | Int_t GetIndex() const {return GetBindex();} //for the consistensy with V0 | |
c028b974 | 52 | void SetDcaXiDaughters(Double_t rDcaXiDaughters=0.); |
53 | Double_t GetDcaXiDaughters() const {return fDcaXiDaughters;} | |
54 | Double_t GetCascadeCosineOfPointingAngle(Double_t&, Double_t&, Double_t&) const; | |
e23730c7 | 55 | |
074f017b | 56 | void GetPosCovXi(Double_t cov[6]) const; |
57 | ||
e23730c7 | 58 | protected: |
562dd0b4 | 59 | |
8668c148 | 60 | Double32_t fEffMassXi; // reconstructed cascade effective mass |
61402fa9 | 61 | Double32_t fChi2Xi; // chi2 value |
62 | Double32_t fDcaXiDaughters; // dca between Xi's daughters | |
63 | Double32_t fPosXi[3]; // cascade vertex position (global) | |
64 | Double32_t fPosCovXi[6]; // covariance matrix of the vertex position | |
61402fa9 | 65 | Double32_t fBachMom[3]; // bachelor momentum (global) |
66 | Double32_t fBachMomCov[6]; // covariance matrix of the bachelor momentum. | |
562dd0b4 | 67 | Int_t fPdgCodeXi; // reconstructed cascade type (PDG code) |
68 | Int_t fBachIdx; // label of the bachelor track | |
69 | ||
e23730c7 | 70 | |
d6a49f20 | 71 | private: |
72 | AliESDcascade& operator=(const AliESDcascade&); | |
73 | ||
562dd0b4 | 74 | ClassDef(AliESDcascade,5) // reconstructed cascade vertex |
e23730c7 | 75 | }; |
76 | ||
c028b974 | 77 | inline |
78 | void AliESDcascade::SetDcaXiDaughters(Double_t rDcaXiDaughters){ | |
79 | fDcaXiDaughters=rDcaXiDaughters; | |
80 | } | |
e23730c7 | 81 | |
c028b974 | 82 | #endif |