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d77fd7b3 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
16 | //------------------------------------------------------------------------- | |
17 | // Implementation of the Analysis Oriented Data (AOD) V0 vertex class | |
18 | // | |
19 | // Origin: B.Hippolyte, IReS, hippolyt@in2p3.fr | |
20 | // G.Van Buren, BNL, gene@bnl.gov (original STAR MuDsts) | |
2d8e3807 | 21 | // |
22 | // Purpose: Having observables for physics available for V0s | |
d77fd7b3 | 23 | //------------------------------------------------------------------------- |
24 | #include <Riostream.h> | |
25 | #include <TMath.h> | |
d77fd7b3 | 26 | |
27 | #include "AliESD.h" | |
d77fd7b3 | 28 | #include "AliAODv0.h" |
29 | ||
30 | ClassImp(AliAODv0) | |
31 | ||
32 | AliAODv0::AliAODv0() : TObject() { | |
33 | //-------------------------------------------------------------------- | |
34 | // Default constructor | |
35 | //-------------------------------------------------------------------- | |
36 | fDecayVertexV0X = 999; | |
37 | fDecayVertexV0Y = 999; | |
38 | fDecayVertexV0Z = 999; | |
39 | fDcaV0Daughters = 999; | |
40 | fDcaV0ToPrimVertex = 999; | |
41 | fDcaPosToPrimVertex = 999; | |
42 | fDcaNegToPrimVertex = 999; | |
43 | fMomPosX = 999; | |
44 | fMomPosY = 999; | |
45 | fMomPosZ = 999; | |
46 | fMomNegX = 999; | |
47 | fMomNegY = 999; | |
48 | fMomNegZ = 999; | |
49 | ||
50 | fKeyPos = 999; | |
51 | fKeyNeg = 999; | |
52 | ||
53 | fChi2 = 999; | |
54 | fEvent = 0; | |
55 | } | |
56 | ||
57 | AliAODv0::AliAODv0(AliESDv0* rV0Vertex ,AliESD* rEvent){ | |
58 | this->Fill(rV0Vertex,rEvent); | |
59 | } | |
60 | ||
61 | // AliAODv0::~AliAODv0(){ | |
62 | // } | |
63 | ||
2d8e3807 | 64 | void AliAODv0::Fill(AliESDv0* rV0Vertex ,AliESD* rEvent){// Filling method |
d77fd7b3 | 65 | fEvent=rEvent; |
66 | Double_t tDecayVertexV0[3]; rV0Vertex->GetXYZ(tDecayVertexV0[0],tDecayVertexV0[1],tDecayVertexV0[2]); | |
67 | fDecayVertexV0X = tDecayVertexV0[0]; | |
68 | fDecayVertexV0Y = tDecayVertexV0[1]; | |
69 | fDecayVertexV0Z = tDecayVertexV0[2]; | |
70 | ||
71 | fDcaV0Daughters = rV0Vertex->GetDcaDaughters(); | |
72 | ||
73 | fDcaV0ToPrimVertex = rV0Vertex->GetD(); | |
74 | ||
75 | ||
76 | Double_t tMomPos[3]; rV0Vertex->GetPPxPyPz(tMomPos[0],tMomPos[1],tMomPos[2]); | |
77 | fMomPosX = tMomPos[0]; | |
78 | fMomPosY = tMomPos[1]; | |
79 | fMomPosZ = tMomPos[2]; | |
80 | ||
81 | Double_t tMomNeg[3]; rV0Vertex->GetNPxPyPz(tMomNeg[0],tMomNeg[1],tMomNeg[2]); | |
82 | fMomNegX = tMomNeg[0]; | |
83 | fMomNegY = tMomNeg[1]; | |
84 | fMomNegZ = tMomNeg[2]; | |
85 | ||
86 | fKeyPos = TMath::Abs(rV0Vertex->GetPindex());// need to ask why Abs | |
87 | fKeyNeg = TMath::Abs(rV0Vertex->GetNindex()); | |
88 | ||
89 | AliESDtrack *pTrack=fEvent->GetTrack(fKeyPos); | |
90 | AliESDtrack *nTrack=fEvent->GetTrack(fKeyNeg); | |
91 | ||
92 | Float_t tDcaPosToPrimVertex[2]; | |
93 | if(pTrack) pTrack->GetImpactParameters(tDcaPosToPrimVertex[0],tDcaPosToPrimVertex[1]); | |
94 | else { tDcaPosToPrimVertex[0]=999.; tDcaPosToPrimVertex[1]=999.;} | |
95 | ||
96 | fDcaPosToPrimVertex = TMath::Sqrt(tDcaPosToPrimVertex[0]*tDcaPosToPrimVertex[0]+tDcaPosToPrimVertex[1]*tDcaPosToPrimVertex[1]); | |
97 | ||
98 | Float_t tDcaNegToPrimVertex[2]; | |
99 | if(nTrack) nTrack->GetImpactParameters(tDcaNegToPrimVertex[0],tDcaNegToPrimVertex[1]); | |
100 | else { tDcaNegToPrimVertex[0]=999.; tDcaNegToPrimVertex[1]=999.;} | |
101 | ||
102 | fDcaNegToPrimVertex = TMath::Sqrt(tDcaNegToPrimVertex[0]*tDcaNegToPrimVertex[0]+tDcaNegToPrimVertex[1]*tDcaPosToPrimVertex[1]); | |
103 | } | |
104 | ||
2d8e3807 | 105 | void AliAODv0::ResetV0(){// Reset method |
d77fd7b3 | 106 | fDecayVertexV0X = 999; |
107 | fDecayVertexV0Y = 999; | |
108 | fDecayVertexV0Z = 999; | |
109 | fDcaV0Daughters = 999; | |
110 | fDcaV0ToPrimVertex = 999; | |
111 | fDcaPosToPrimVertex = 999; | |
112 | fDcaNegToPrimVertex = 999; | |
113 | fMomPosX = 999; | |
114 | fMomPosY = 999; | |
115 | fMomPosZ = 999; | |
116 | fMomNegX = 999; | |
117 | fMomNegY = 999; | |
118 | fMomNegZ = 999; | |
119 | ||
120 | fKeyPos = 999; | |
121 | fKeyNeg = 999; | |
122 | ||
123 | fChi2 = 999; | |
124 | } |