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a9a2d814 | 1 | #ifndef ALICASCADEVERTEXER_H |
2 | #define ALICASCADEVERTEXER_H | |
3 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
4 | * See cxx source for full Copyright notice */ | |
5 | ||
6 | //------------------------------------------------------------------ | |
7 | // Cascade Vertexer Class | |
18856a77 | 8 | // Reads V0s and tracks, writes out cascade vertices |
a9a2d814 | 9 | // Origin: Christian Kuhn, IReS, Strasbourg, christian.kuhn@ires.in2p3.fr |
10 | //------------------------------------------------------------------ | |
11 | ||
12 | #include "TObject.h" | |
13 | ||
e23730c7 | 14 | class AliESD; |
566abf75 | 15 | class TTree; |
c7bafca9 | 16 | class AliESDv0; |
17 | class AliExternalTrackParam; | |
a9a2d814 | 18 | |
19 | //_____________________________________________________________________________ | |
20 | class AliCascadeVertexer : public TObject { | |
21 | public: | |
22 | AliCascadeVertexer(); | |
23 | AliCascadeVertexer(const Double_t cuts[8]); | |
24 | void SetCuts(const Double_t cuts[8]); | |
e1cac29c | 25 | void SetVertex(Double_t *vtx) { fX=vtx[0]; fY=vtx[1]; fZ=vtx[2]; } |
a9a2d814 | 26 | |
e23730c7 | 27 | Int_t V0sTracks2CascadeVertices(AliESD *event); |
c7bafca9 | 28 | Double_t PropagateToDCA(AliESDv0 *vtx,AliExternalTrackParam *trk,Double_t b); |
a9a2d814 | 29 | |
30 | void GetCuts(Double_t cuts[8]) const; | |
e1cac29c | 31 | void GetVertex(Double_t *vtx) const { vtx[0]=fX; vtx[1]=fY; vtx[2]=fZ; } |
a9a2d814 | 32 | |
33 | private: | |
34 | Double_t fChi2max; // maximal allowed chi2 | |
35 | Double_t fDV0min; // min. allowed V0 impact parameter | |
36 | Double_t fMassWin; // window around the Lambda mass | |
37 | Double_t fDBachMin; // min. allowed bachelor impact parameter | |
38 | Double_t fDCAmax; // maximal allowed DCA between the V0 and the track | |
39 | Double_t fCPAmax; // maximal allowed cosine of the cascade pointing angle | |
40 | Double_t fRmin, fRmax;// max & min radii of the fiducial volume | |
41 | ||
e1cac29c | 42 | Double_t fX; // X-coordinate of the primary vertex |
43 | Double_t fY; // Y-coordinate of the primary vertex | |
44 | Double_t fZ; // Z-coordinate of the primary vertex | |
45 | ||
a9a2d814 | 46 | ClassDef(AliCascadeVertexer,1) // cascade verterxer |
47 | }; | |
48 | ||
49 | inline AliCascadeVertexer::AliCascadeVertexer() { | |
50 | fChi2max=33.; | |
51 | fDV0min=0.015; fMassWin=0.05; fDBachMin=0.015; | |
52 | fDCAmax=0.01; fCPAmax=0.025; | |
53 | fRmin=0.5; fRmax=2.5; | |
54 | } | |
55 | ||
56 | inline AliCascadeVertexer::AliCascadeVertexer(const Double_t cuts[8]) { | |
57 | fChi2max=cuts[0]; | |
58 | fDV0min=cuts[1]; fMassWin=cuts[2]; fDBachMin=cuts[3]; | |
59 | fDCAmax=cuts[4]; fCPAmax=cuts[5]; | |
60 | fRmin=cuts[6]; fRmax=cuts[7]; | |
e1cac29c | 61 | fX=fY=fZ=0.; |
a9a2d814 | 62 | } |
63 | ||
64 | inline void AliCascadeVertexer::SetCuts(const Double_t cuts[8]) { | |
65 | fChi2max=cuts[0]; | |
66 | fDV0min=cuts[1]; fMassWin=cuts[2]; fDBachMin=cuts[3]; | |
67 | fDCAmax=cuts[4]; fCPAmax=cuts[5]; | |
68 | fRmin=cuts[6]; fRmax=cuts[7]; | |
69 | } | |
70 | ||
71 | inline void AliCascadeVertexer::GetCuts(Double_t cuts[8]) const { | |
72 | cuts[0]=fChi2max; | |
73 | cuts[1]=fDV0min; cuts[2]=fMassWin; cuts[3]=fDBachMin; | |
74 | cuts[4]=fDCAmax; cuts[5]=fCPAmax; | |
75 | cuts[6]=fRmin; cuts[7]=fRmax; | |
76 | } | |
77 | ||
78 | #endif | |
79 |