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 //-------------------------------------------------------------------------
18 class AliExternalTrackParam;
20 class AliESDv0 : public TObject {
23 AliESDv0(const AliExternalTrackParam &t1, Int_t i1,
24 const AliExternalTrackParam &t2, Int_t i2);
26 AliESDv0(const AliESDv0&);
28 AliESDv0& operator=(const AliESDv0&);
30 Double_t ChangeMassHypothesis(Int_t code=kK0Short);
32 Int_t GetPdgCode() const {return fPdgCode;}
33 Double_t GetEffMass() const {return fEffMass;}
34 Double_t GetChi2V0() const {return fChi2V0;}
35 void GetPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const;
36 void GetNPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const;
37 void GetPPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const;
38 void GetXYZ(Double_t &x, Double_t &y, Double_t &z) const;
39 Double_t GetD(Double_t x0=0.,Double_t y0=0.,Double_t z0=0.) const;
40 Int_t GetNindex() const {return fNidx;}
41 Int_t GetPindex() const {return fPidx;}
42 void SetESDindexes(Int_t ip, Int_t im){fNidx=ip;fPidx=im;}
43 void SetDcaV0Daughters(Double_t rDcaV0Daughters=0.);
44 Double_t GetDcaV0Daughters() {return fDcaV0Daughters;}
45 Double_t GetV0CosineOfPointingAngle(Double_t&, Double_t&, Double_t&) const;
48 Int_t fPdgCode; // reconstructed V0's type (PDG code)
49 Double_t fEffMass; // reconstructed V0's effective mass
50 Double_t fDcaV0Daughters; // dca between V0's daughters
51 Double_t fChi2V0; // V0's chi2 value
52 Double_t fPos[3]; // V0's position (global)
53 Double_t fPosCov[6]; // covariance matrix of the vertex position
55 Int_t fNidx; // index of the negative daughter
56 Double_t fNmom[3]; // momentum of the negative daughter (global)
57 Double_t fNmomCov[6]; // covariance matrix of the negative daughter mom.
59 Int_t fPidx; // index of the positive daughter
60 Double_t fPmom[3]; // momentum of the positive daughter (global)
61 Double_t fPmomCov[6]; // covariance matrix of the positive daughter mom.
63 ClassDef(AliESDv0,1) // ESD V0 vertex
67 void AliESDv0::GetNPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const {
68 px=fNmom[0]; py=fNmom[1]; pz=fNmom[2];
72 void AliESDv0::GetPPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const {
73 px=fPmom[0]; py=fPmom[1]; pz=fPmom[2];
77 void AliESDv0::SetDcaV0Daughters(Double_t rDcaV0Daughters){
78 fDcaV0Daughters=rDcaV0Daughters;