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Modifying the GetChainFromCollection function based on the additions of the TEntryList
[u/mrichter/AliRoot.git] / ANALYSIS / AliAODv0.h
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d77fd7b3 1#ifndef ALIAODV0_H
2#define ALIAODV0_H
3
4/* Copyright(c) 2004-2005, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice */
6
7//-------------------------------------------------------------------------
8// Implementation of the Analysis Oriented Data (AOD) V0 vertex class
d77fd7b3 9// Origin: B.Hippolyte, IReS, hippolyt@in2p3.fr
10// G.Van Buren, BNL, gene@bnl.gov (original STAR MuDsts)
2d8e3807 11// Purpose: Having observables for physics available for V0s
d77fd7b3 12//-------------------------------------------------------------------------
13
14#include <TObject.h>
a98dba45 15#include <TDatabasePDG.h>
16
17#define MASS(PID) TDatabasePDG::Instance()->GetParticle((PID))->Mass()
18#define MASS2(PID) MASS((PID))*MASS((PID))
d77fd7b3 19
20class AliESD;
21class AliESDVertex;
22class AliESDv0;
23class AliESDtrack;
24
25
26class AliAODv0 : public TObject {
27
28public:
29 AliAODv0();
2d8e3807 30 AliAODv0(AliESDv0 *rV0Vertex, AliESD *rEvent);
c028b974 31 AliAODv0(const AliAODv0& rAliAODv0);
32 virtual ~AliAODv0();
33
34 AliAODv0& operator=(const AliAODv0& rAliAODv0);
35
2d8e3807 36 void Fill(AliESDv0 *rV0Vertex, AliESD *rEvent);
37 void ResetV0();
d77fd7b3 38
2d8e3807 39 Double_t DecayVertexV0X() const;
40 Double_t DecayVertexV0Y() const;
41 Double_t DecayVertexV0Z() const;
a98dba45 42
c028b974 43 Double_t DecayLengthV0(double*) const;
d77fd7b3 44
2d8e3807 45 Double_t DcaV0Daughters() const;
46 Double_t DcaV0ToPrimVertex() const;
47 Double_t DcaPosToPrimVertex() const;
48 Double_t DcaNegToPrimVertex() const;
c028b974 49 Double_t CosPointAngle(Double_t&, Double_t&, Double_t&) const;
50 Double_t RadiusV0() const;
51 Double_t OpenAngleV0() const;
2d8e3807 52
53 Double_t MomPosX() const;
54 Double_t MomPosY() const;
55 Double_t MomPosZ() const;
56 Double_t MomNegX() const;
57 Double_t MomNegY() const;
58 Double_t MomNegZ() const;
59
60 Int_t KeyPos() const;
61 Int_t KeyNeg() const;
62
63 Double_t Chi2V0() const;
64
65 Double_t MomV0X() const;
66 Double_t MomV0Y() const;
67 Double_t MomV0Z() const;
68
69 Double_t Ptot2Pos() const;
70 Double_t Ptot2Neg() const;
71 Double_t Ptot2V0() const;
72 Double_t Pt2V0() const;
73 Double_t MomPosAlongV0() const;
74 Double_t MomNegAlongV0() const;
75 Double_t AlphaV0() const;
76 Double_t PtArmV0() const;
a98dba45 77 Double_t EPosProton() const;
78 Double_t ENegProton() const;
79 Double_t EPosPion() const;
80 Double_t ENegPion() const;
81 Double_t ELambda() const;
82 Double_t EK0Short() const;
83 Double_t MassLambda() const;
84 Double_t MassAntiLambda() const;
85 Double_t MassK0Short() const;
86 Double_t RapK0Short() const;
87 Double_t RapLambda() const;
c028b974 88 Double_t PseudoRapV0() const;
89 Double_t PseudoRapPos() const;
90 Double_t PseudoRapNeg() const;
a98dba45 91
d77fd7b3 92
93protected:
2d8e3807 94 Double_t fDecayVertexV0X; // decay vertex of V0 along X
95 Double_t fDecayVertexV0Y; // decay vertex of V0 along Y
96 Double_t fDecayVertexV0Z; // decay vertex of V0 along Z
97 Double_t fDcaV0Daughters; // dca between V0 daughters
98 Double_t fDcaV0ToPrimVertex; // dca of V0 to primary vertex
99 Double_t fDcaPosToPrimVertex; // dca of pos daughter to primary vertex
100 Double_t fDcaNegToPrimVertex; // dca of pos daughter to primary vertex
101 Double_t fMomPosX; // momemtum of pos daughter along X
102 Double_t fMomPosY; // momemtum of pos daughter along Y
103 Double_t fMomPosZ; // momemtum of pos daughter along Z
104 Double_t fMomNegX; // momemtum of neg daughter along X
105 Double_t fMomNegY; // momemtum of neg daughter along Y
106 Double_t fMomNegZ; // momemtum of neg daughter along Z
107
c028b974 108 UInt_t fKeyPos; // track key/index to pos daughter
109 UInt_t fKeyNeg; // track key/index to neg daughter
2d8e3807 110
111 Double_t fChi2; // main quality variable of V0
2d8e3807 112
113 ClassDef(AliAODv0,1)
d77fd7b3 114};
115
2d8e3807 116inline Double_t AliAODv0::DecayVertexV0X() const {return fDecayVertexV0X;}
117inline Double_t AliAODv0::DecayVertexV0Y() const {return fDecayVertexV0Y;}
118inline Double_t AliAODv0::DecayVertexV0Z() const {return fDecayVertexV0Z;}
d77fd7b3 119
c028b974 120inline Double_t AliAODv0::DecayLengthV0(double *tParentVertexPosition) const {
121 return ::sqrt(::pow(DecayVertexV0X() - tParentVertexPosition[0],2) +
122 ::pow(DecayVertexV0Y() - tParentVertexPosition[1],2) +
123 ::pow(DecayVertexV0Z() - tParentVertexPosition[2],2));
a98dba45 124}
125
2d8e3807 126inline Double_t AliAODv0::DcaV0Daughters() const {return fDcaV0Daughters;}
127inline Double_t AliAODv0::DcaV0ToPrimVertex() const {return fDcaV0ToPrimVertex;}
128inline Double_t AliAODv0::DcaPosToPrimVertex() const {return fDcaPosToPrimVertex;}
129inline Double_t AliAODv0::DcaNegToPrimVertex() const {return fDcaNegToPrimVertex;}
d77fd7b3 130
2d8e3807 131inline Double_t AliAODv0::MomPosX() const {return fMomPosX;}
132inline Double_t AliAODv0::MomPosY() const {return fMomPosY;}
133inline Double_t AliAODv0::MomPosZ() const {return fMomPosZ;}
134inline Double_t AliAODv0::MomNegX() const {return fMomNegX;}
135inline Double_t AliAODv0::MomNegY() const {return fMomNegY;}
136inline Double_t AliAODv0::MomNegZ() const {return fMomNegZ;}
d77fd7b3 137
2d8e3807 138inline Int_t AliAODv0::KeyPos() const {return fKeyPos;}
139inline Int_t AliAODv0::KeyNeg() const {return fKeyNeg;}
d77fd7b3 140
2d8e3807 141inline Double_t AliAODv0::Chi2V0() const {return fChi2;}
d77fd7b3 142
c028b974 143inline Double_t AliAODv0::CosPointAngle(Double_t& refPointX, Double_t& refPointY, Double_t& refPointZ) const {
144
145 Double_t deltaPos[3]; //vector between the reference point and the V0 vertex
146 deltaPos[0] = fDecayVertexV0X - refPointX;
147 deltaPos[1] = fDecayVertexV0Y - refPointY;
148 deltaPos[2] = fDecayVertexV0Z - refPointZ;
149
150 Double_t deltaPos2 = deltaPos[0]*deltaPos[0] + deltaPos[1]*deltaPos[1] + deltaPos[2]*deltaPos[2];
151
152 Double_t cosinePointingAngle = (deltaPos[0]*MomV0X() +
153 deltaPos[1]*MomV0Y() +
154 deltaPos[2]*MomV0Z() ) /
155 TMath::Sqrt(Ptot2V0() * deltaPos2);
156 return cosinePointingAngle;
157}
158
2d8e3807 159inline Double_t AliAODv0::MomV0X() const {return MomPosX()+MomNegX();}
160inline Double_t AliAODv0::MomV0Y() const {return MomPosY()+MomNegY();}
161inline Double_t AliAODv0::MomV0Z() const {return MomPosZ()+MomNegZ();}
d77fd7b3 162
2d8e3807 163inline Double_t AliAODv0::Ptot2Pos() const {
164 return (::pow(MomPosX(),2) + ::pow(MomPosY(),2) + ::pow(MomPosZ(),2) );
d77fd7b3 165}
2d8e3807 166inline Double_t AliAODv0::Ptot2Neg() const {
167 return (::pow(MomNegX(),2) + ::pow(MomNegY(),2) + ::pow(MomNegZ(),2) );
d77fd7b3 168}
2d8e3807 169inline Double_t AliAODv0::Pt2V0() const {
170 return (::pow(MomV0X(),2) + ::pow(MomV0Y(),2) );
d77fd7b3 171}
172
2d8e3807 173inline Double_t AliAODv0::Ptot2V0() const {return ( Pt2V0() + ::pow(MomV0Z(),2) );}
d77fd7b3 174
2d8e3807 175inline Double_t AliAODv0::MomPosAlongV0() const {
176 Double_t lPtot2V0 = Ptot2V0();
177 if (lPtot2V0)
178 return (MomPosX()*MomV0X() +
179 MomPosY()*MomV0Y() +
180 MomPosZ()*MomV0Z()) / ::sqrt(lPtot2V0);
d77fd7b3 181 return 0.;
182}
183
2d8e3807 184inline Double_t AliAODv0::MomNegAlongV0() const {
185 Double_t lPtot2V0 = Ptot2V0();
186 if (lPtot2V0)
187 return (MomNegX()*MomV0X() +
188 MomNegY()*MomV0Y() +
189 MomNegZ()*MomV0Z()) / ::sqrt(lPtot2V0);
d77fd7b3 190 return 0.;
191}
192
2d8e3807 193inline Double_t AliAODv0::AlphaV0() const {
d77fd7b3 194 return 1.-(2./(1.+(MomPosAlongV0()/MomNegAlongV0())));
195}
2d8e3807 196inline Double_t AliAODv0::PtArmV0() const {
d77fd7b3 197 return ::sqrt(Ptot2Pos()-MomPosAlongV0()*MomPosAlongV0());
198}
199
a98dba45 200inline Double_t AliAODv0::EPosProton() const {
201 return ::sqrt(Ptot2Pos()+MASS2("proton"));
202}
203
204inline Double_t AliAODv0::ENegProton() const {
205 return ::sqrt(Ptot2Neg()+MASS2("antiproton"));
206}
207
208inline Double_t AliAODv0::EPosPion() const {
209 return ::sqrt(Ptot2Pos()+MASS2("pi+"));
210}
211
212inline Double_t AliAODv0::ENegPion() const {
213 return ::sqrt(Ptot2Neg()+MASS2("pi-"));
214}
215
216inline Double_t AliAODv0::ELambda() const {
217 return ::sqrt(Ptot2V0()+MASS2("Lambda0"));
218}
219
220inline Double_t AliAODv0::EK0Short() const {
221 return ::sqrt(Ptot2V0()+MASS2("K_S0"));
222}
223
224inline Double_t AliAODv0::MassLambda() const {
225 return ::sqrt(::pow(EPosProton()+ENegPion(),2)-Ptot2V0());
226}
227
228inline Double_t AliAODv0::MassAntiLambda() const {
229 return ::sqrt(::pow(ENegProton()+EPosPion(),2)-Ptot2V0());
230}
231
232inline Double_t AliAODv0::MassK0Short() const {
233 return ::sqrt(::pow(EPosPion()+ENegPion(),2)-Ptot2V0());
234}
235
236inline Double_t AliAODv0::RapK0Short() const {
237 Double_t ek0 = EK0Short();
238 Double_t mMomV0Z = MomV0Z();
239 return 0.5*::log((ek0+mMomV0Z)/(ek0-mMomV0Z));
240}
241
242inline Double_t AliAODv0::RapLambda() const {
243 Double_t eLambda = ELambda();
244 Double_t mMomV0Z = MomV0Z();
245 return 0.5*::log((eLambda+mMomV0Z)/(eLambda-mMomV0Z));
246}
247
c028b974 248inline Double_t AliAODv0::RadiusV0() const {
249 return ::sqrt( fDecayVertexV0X*fDecayVertexV0X
250 + fDecayVertexV0Y*fDecayVertexV0Y );
251}
d77fd7b3 252
c028b974 253inline Double_t AliAODv0::PseudoRapV0() const {
254 Double_t lTheta = ::acos( MomV0Z()/::sqrt(Ptot2V0()) );
255 return ( -::log(TMath::Tan(lTheta/2.)) );
256}
d77fd7b3 257
c028b974 258inline Double_t AliAODv0::PseudoRapPos() const {
259 Double_t lTheta = ::acos( MomPosZ()/::sqrt(Ptot2Pos()) );
260 return ( -::log(TMath::Tan(lTheta/2.)) );
261}
262
263inline Double_t AliAODv0::PseudoRapNeg() const {
264 Double_t lTheta = ::acos( MomNegZ()/::sqrt(Ptot2Neg()) );
265 return ( -::log(TMath::Tan(lTheta/2.)) );
266}
267
268inline Double_t AliAODv0::OpenAngleV0() const {
269 Double_t lPtot1xPtot2 = fMomPosX*fMomNegX+fMomPosY*fMomNegY+fMomPosZ*fMomNegZ;
270 Double_t lPtot1Ptot2_2 = Ptot2Pos()*Ptot2Neg();
271 return ::acos(lPtot1xPtot2/::sqrt(lPtot1Ptot2_2) );
272}
273
274#endif