3 /* Copyright(c) 1998-2007, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
6 //-------------------------------------------------------------------------
7 // Analysis Oriented Data (AOD) V0 vertex class
8 // Authors: B.Hippolyte, IPHC, hippolyt@in2p3.fr
9 // G.Van Buren, BNL, gene@bnl.gov (original STAR MuDsts)
10 //-------------------------------------------------------------------------
12 #include "AliAODRecoDecay.h"
14 class AliAODv0 : public AliAODRecoDecay {
19 AliAODv0(AliAODVertex *rAODVertex, Double_t rDcaV0Daughters, Double_t rDcaV0ToPrimVertex,
20 const Double_t *rMomPos, const Double_t *rMomNeg, Double_t *rDcaDaughterToPrimVertex);
23 AliAODv0(const AliAODv0& rAliAODv0);
24 AliAODv0& operator=(const AliAODv0& rAliAODv0);
26 void Fill(AliAODVertex *rAODVertex, Double_t rDcaV0Daughters, Double_t rDcaV0ToPrimVertex,
27 const Double_t *rMomPos, const Double_t *rMomNeg, const Double_t *rDcaDaughterToPrimVertex);
29 void Print(Option_t* option = "") const;
31 void SetOnFlyStatus(Bool_t status){fOnFlyStatus=status;}
32 Bool_t GetOnFlyStatus() const {return fOnFlyStatus;}
34 Double_t DecayVertexV0X() const;
35 Double_t DecayVertexV0Y() const;
36 Double_t DecayVertexV0Z() const;
38 Double_t DecayLengthV0(const Double_t *) const;
40 Double_t DcaV0Daughters() const;
41 Double_t DcaV0ToPrimVertex() const;
42 Double_t DcaPosToPrimVertex() const;
43 Double_t DcaNegToPrimVertex() const;
44 Double_t RadiusV0() const;
45 Double_t OpenAngleV0() const;
47 Double_t MomPosX() const;
48 Double_t MomPosY() const;
49 Double_t MomPosZ() const;
50 Double_t MomNegX() const;
51 Double_t MomNegY() const;
52 Double_t MomNegZ() const;
54 Double_t Chi2V0() const;
56 Double_t MomV0X() const;
57 Double_t MomV0Y() const;
58 Double_t MomV0Z() const;
60 Double_t Ptot2Pos() const;
61 Double_t Ptot2Neg() const;
62 Double_t Ptot2V0() const;
63 Double_t Pt2V0() const;
64 Double_t MomPosAlongV0() const;
65 Double_t MomNegAlongV0() const;
66 Double_t AlphaV0() const;
67 Double_t PtArmV0() const;
68 Double_t EPosProton() const;
69 Double_t ENegProton() const;
70 Double_t EPosPion() const;
71 Double_t ENegPion() const;
72 Double_t ELambda() const;
73 Double_t EK0Short() const;
74 Double_t MassLambda() const;
75 Double_t MassAntiLambda() const;
76 Double_t MassK0Short() const;
77 Double_t RapK0Short() const;
78 Double_t RapLambda() const;
79 Double_t PseudoRapV0() const;
80 Double_t PseudoRapPos() const;
81 Double_t PseudoRapNeg() const;
83 Short_t GetPosID() const;
84 Short_t GetNegID() const;
85 Int_t GetLabel() const {return -1;} // Dummy
88 Double32_t fDcaV0ToPrimVertex; // dca of V0 to primary vertex
89 Bool_t fOnFlyStatus; // if kTRUE, then this V0 is recontructed
90 // "on fly" during the tracking
94 inline Double_t AliAODv0::DecayVertexV0X() const {return this->GetSecVtxX();}
95 inline Double_t AliAODv0::DecayVertexV0Y() const {return this->GetSecVtxY();}
96 inline Double_t AliAODv0::DecayVertexV0Z() const {return this->GetSecVtxZ();}
98 inline Double_t AliAODv0::DecayLengthV0(const Double_t *tParentVertexPosition) const {
99 return ::sqrt(::pow(DecayVertexV0X() - tParentVertexPosition[0],2) +
100 ::pow(DecayVertexV0Y() - tParentVertexPosition[1],2) +
101 ::pow(DecayVertexV0Z() - tParentVertexPosition[2],2));
104 inline Double_t AliAODv0::DcaV0Daughters() const {return fDCA[0];}
105 inline Double_t AliAODv0::DcaV0ToPrimVertex() const {return fDcaV0ToPrimVertex;}
106 inline Double_t AliAODv0::DcaPosToPrimVertex() const {return fd0[0];}
107 inline Double_t AliAODv0::DcaNegToPrimVertex() const {return fd0[1];}
109 inline Double_t AliAODv0::RadiusV0() const {
110 return RadiusSecVtx();
113 inline Double_t AliAODv0::OpenAngleV0() const {
114 Double_t lScalPtot1Ptot2 = PxProng(0)*PxProng(1)+PyProng(0)*PyProng(1)+PzProng(0)*PzProng(1);
115 Double_t lPtot1xPtot2 = Ptot2Pos()*Ptot2Neg();
116 return ::acos(lScalPtot1Ptot2/::sqrt(lPtot1xPtot2) );
119 inline Double_t AliAODv0::MomPosX() const {return fPx[0];}
120 inline Double_t AliAODv0::MomPosY() const {return fPy[0];}
121 inline Double_t AliAODv0::MomPosZ() const {return fPz[0];}
122 inline Double_t AliAODv0::MomNegX() const {return fPx[1];}
123 inline Double_t AliAODv0::MomNegY() const {return fPy[1];}
124 inline Double_t AliAODv0::MomNegZ() const {return fPz[1];}
126 inline Double_t AliAODv0::Chi2V0() const {return GetSecondaryVtx()->GetChi2perNDF();}
128 // Compare eventually AliAODv0::MomV0X() and AliAODRecoDecay::Px()
129 inline Double_t AliAODv0::MomV0X() const {return MomPosX()+MomNegX();}
130 inline Double_t AliAODv0::MomV0Y() const {return MomPosY()+MomNegY();}
131 inline Double_t AliAODv0::MomV0Z() const {return MomPosZ()+MomNegZ();}
133 inline Double_t AliAODv0::Ptot2Pos() const {
134 return (::pow(MomPosX(),2) + ::pow(MomPosY(),2) + ::pow(MomPosZ(),2) );
136 inline Double_t AliAODv0::Ptot2Neg() const {
137 return (::pow(MomNegX(),2) + ::pow(MomNegY(),2) + ::pow(MomNegZ(),2) );
139 inline Double_t AliAODv0::Ptot2V0() const {return ( Pt2V0() + ::pow(MomV0Z(),2) );}
140 inline Double_t AliAODv0::Pt2V0() const {
141 return (::pow(MomV0X(),2) + ::pow(MomV0Y(),2) );
144 inline Double_t AliAODv0::MomPosAlongV0() const {
145 Double_t lPtot2V0 = Ptot2V0();
147 return (MomPosX()*MomV0X() +
149 MomPosZ()*MomV0Z()) / ::sqrt(lPtot2V0);
153 inline Double_t AliAODv0::MomNegAlongV0() const {
154 Double_t lPtot2V0 = Ptot2V0();
156 return (MomNegX()*MomV0X() +
158 MomNegZ()*MomV0Z()) / ::sqrt(lPtot2V0);
162 inline Double_t AliAODv0::AlphaV0() const {
165 inline Double_t AliAODv0::PtArmV0() const {
169 inline Double_t AliAODv0::EPosProton() const {
170 return EProng(0,2212);
173 inline Double_t AliAODv0::ENegProton() const {
174 return EProng(1,2212);
177 inline Double_t AliAODv0::EPosPion() const {
178 return EProng(0,211);
181 inline Double_t AliAODv0::ENegPion() const {
182 return EProng(1,211);
185 inline Double_t AliAODv0::ELambda() const {
189 inline Double_t AliAODv0::EK0Short() const {
193 inline Double_t AliAODv0::MassLambda() const {
194 return InvMass2Prongs(0,1,2212,211);
197 inline Double_t AliAODv0::MassAntiLambda() const {
198 return InvMass2Prongs(0,1,211,2212);
201 inline Double_t AliAODv0::MassK0Short() const {
202 return InvMass2Prongs(0,1,211,211);
205 inline Double_t AliAODv0::RapK0Short() const {
209 inline Double_t AliAODv0::RapLambda() const {
213 inline Double_t AliAODv0::PseudoRapV0() const {
217 inline Double_t AliAODv0::PseudoRapPos() const {
221 inline Double_t AliAODv0::PseudoRapNeg() const {
224 //----------------------------------------------------------------------------