1 #ifndef ALICASCADEVERTEX_H
2 #define ALICASCADEVERTEX_H
4 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice */
7 //-------------------------------------------------------------------------
8 // Cascade Vertex Class
10 // Origin: Christian Kuhn, IReS, Strasbourg, christian.kuhn@ires.in2p3.fr
11 //-------------------------------------------------------------------------
20 #define kXiPlusBar -3312
21 #define kOmegaMinus 3334
22 #define kOmegaPlusBar -3334
24 class AliCascadeVertex : public TObject {
27 AliCascadeVertex(const AliV0vertex &vtx, const AliITStrackV2 &trk);
29 Double_t ChangeMassHypothesis(Double_t &v0q, Int_t code=kXiMinus);
31 Int_t GetPdgCode() const {return fPdgCode;}
32 Double_t GetEffMass() const {return fEffMass;}
33 Double_t GetChi2() const {return fChi2;}
34 void GetPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const;
35 void GetXYZ(Double_t &x, Double_t &y, Double_t &z) const;
36 Double_t GetD(Double_t x0=0.,Double_t y0=0.,Double_t z0=0.) const;
38 void GetNPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const {
39 px=fV0mom[0][0]; py=fV0mom[0][1]; pz=fV0mom[0][2];
41 Int_t GetNlabel() const {return fV0lab[0];}
42 void GetPPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const {
43 px=fV0mom[1][0]; py=fV0mom[1][1]; pz=fV0mom[1][2];
45 Int_t GetPlabel() const {return fV0lab[1];}
46 void GetBPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const {
47 px=fBachMom[0]; py=fBachMom[1]; pz=fBachMom[2];
49 Int_t GetBlabel() const {return fBachLab;}
52 Int_t fPdgCode; // reconstructed cascade type (PDG code)
53 Double_t fEffMass; // reconstructed cascade effective mass
54 Double_t fChi2; // chi2 value
55 Double_t fPos[3]; // cascade vertex position (global)
56 Double_t fPosCov[6]; // covariance matrix of the vertex position
58 Int_t fV0lab[2]; // labels of the V0 daughter tracks
59 Double_t fV0mom[2][3]; // V0 daughters' momenta (global)
60 Double_t fV0momCov[6]; // covariance matrix of the V0 momentum.
62 Int_t fBachLab; // label of the bachelor track
63 Double_t fBachMom[3]; // bachelor momentum (global)
64 Double_t fBachMomCov[6]; // covariance matrix of the bachelor momentum.
66 ClassDef(AliCascadeVertex,1) // reconstructed cascade vertex