4 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice */
9 //-------------------------------------------------------------------------
10 // ESD V0 Vertex Class
11 // This class is part of the Event Summary Data set of classes
12 // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
13 //-------------------------------------------------------------------------
20 class AliESDv0 : public TObject {
24 Double_t ChangeMassHypothesis(Int_t code=kK0Short);
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 void SetDcaDaughters(Double_t rDcaDaughters=0.);
37 Double_t GetDcaDaughters() {return fDcaDaughters;}
40 Int_t fPdgCode; // reconstructed V0's type (PDG code)
41 Double_t fEffMass; // reconstructed V0's effective mass
42 Double_t fDcaDaughters; // dca between V0's daughters
43 Double_t fChi2; // V0's chi2 value
44 Double_t fPos[3]; // V0's position (global)
45 Double_t fPosCov[6]; // covariance matrix of the vertex position
47 Int_t fNidx; // index of the negative daughter
48 Double_t fNmom[3]; // momentum of the negative daughter (global)
49 Double_t fNmomCov[6]; // covariance matrix of the negative daughter mom.
51 Int_t fPidx; // index of the positive daughter
52 Double_t fPmom[3]; // momentum of the positive daughter (global)
53 Double_t fPmomCov[6]; // covariance matrix of the positive daughter mom.
55 ClassDef(AliESDv0,1) // ESD V0 vertex
59 void AliESDv0::GetNPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const {
60 px=fNmom[0]; py=fNmom[1]; pz=fNmom[2];
64 void AliESDv0::GetPPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const {
65 px=fPmom[0]; py=fPmom[1]; pz=fPmom[2];
69 void AliESDv0::SetDcaDaughters(Double_t rDcaDaughters){
70 fDcaDaughters=rDcaDaughters;