1 #ifndef ALIESDCASCADE_H
2 #define ALIESDCASCADE_H
4 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice */
9 //-------------------------------------------------------------------------
10 // ESD Cascade Vertex Class
11 // Implementation of the cascade vertex class
12 // Origin: Christian Kuhn, IReS, Strasbourg, christian.kuhn@ires.in2p3.fr
13 //-------------------------------------------------------------------------
19 class AliExternalTrackParam;
22 #define kXiPlusBar -3312
23 #define kOmegaMinus 3334
24 #define kOmegaPlusBar -3334
26 class AliESDcascade : public AliESDv0 {
30 AliESDcascade(const AliESDcascade&);
31 AliESDcascade(const AliESDv0 &v0,
32 const AliExternalTrackParam &t, Int_t i);
35 Double_t ChangeMassHypothesis(Double_t &v0q, Int_t code=kXiMinus);
37 Int_t GetPdgCode() const {return fPdgCode;}
38 Double_t GetEffMass() const {return fEffMass;}
39 Double_t GetChi2Xi() const {return fChi2Xi;}
40 void GetPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const;
41 void GetXYZcascade(Double_t &x, Double_t &y, Double_t &z) const;
42 Double_t GetDcascade(Double_t x0=0.,Double_t y0=0.,Double_t z0=0.) const;
44 void GetBPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const {
45 px=fBachMom[0]; py=fBachMom[1]; pz=fBachMom[2];
48 Int_t GetBindex() const {return fBachIdx;}
49 void SetDcaXiDaughters(Double_t rDcaXiDaughters=0.);
50 Double_t GetDcaXiDaughters() const {return fDcaXiDaughters;}
51 Double_t GetCascadeCosineOfPointingAngle(Double_t&, Double_t&, Double_t&) const;
53 void GetPosCovXi(Double_t cov[6]) const;
56 Int_t fPdgCode; // reconstructed cascade type (PDG code)
57 Double_t fEffMass; // reconstructed cascade effective mass
58 Double_t fChi2Xi; // chi2 value
59 Double_t fDcaXiDaughters; // dca between Xi's daughters
60 Double_t fPosXi[3]; // cascade vertex position (global)
61 Double_t fPosCovXi[6]; // covariance matrix of the vertex position
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.
68 AliESDcascade& operator=(const AliESDcascade&);
70 ClassDef(AliESDcascade,2) // reconstructed cascade vertex
74 void AliESDcascade::SetDcaXiDaughters(Double_t rDcaXiDaughters){
75 fDcaXiDaughters=rDcaXiDaughters;