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 */
6 //------------------------------------------------------------------
7 // Cascade Vertexer Class
8 // Reads V0s and tracks, writes out cascade vertices
9 // Origin: Christian Kuhn, IReS, Strasbourg, christian.kuhn@ires.in2p3.fr
10 //------------------------------------------------------------------
16 class AliExternalTrackParam;
18 //_____________________________________________________________________________
19 class AliCascadeVertexer : public TObject {
22 void SetCuts(const Double_t cuts[8]);
23 static void SetDefaultCuts(const Double_t cuts[8]);
25 Int_t V0sTracks2CascadeVertices(AliESDEvent *event);
26 Double_t Det(Double_t a00, Double_t a01, Double_t a10, Double_t a11) const;
27 Double_t Det(Double_t a00,Double_t a01,Double_t a02,
28 Double_t a10,Double_t a11,Double_t a12,
29 Double_t a20,Double_t a21,Double_t a22) const;
31 Double_t PropagateToDCA(AliESDv0 *vtx,AliExternalTrackParam *trk,Double_t b);
33 void GetCuts(Double_t cuts[8]) const;
34 static void GetDefaultCuts(Double_t cuts[8]);
38 Double_t fgChi2max; // maximal allowed chi2
40 Double_t fgDV0min; // min. allowed V0 impact parameter
42 Double_t fgMassWin; // window around the Lambda mass
44 Double_t fgDBachMin; // min. allowed bachelor impact parameter
46 Double_t fgDCAmax; // maximal allowed DCA between the V0 and the track
48 Double_t fgCPAmin; // minimal allowed cosine of the cascade pointing angle
50 Double_t fgRmin, fgRmax;// max & min radii of the fiducial volume
52 Double_t fChi2max; // maximal allowed chi2
53 Double_t fDV0min; // min. allowed V0 impact parameter
54 Double_t fMassWin; // window around the Lambda mass
55 Double_t fDBachMin; // min. allowed bachelor impact parameter
56 Double_t fDCAmax; // maximal allowed DCA between the V0 and the track
57 Double_t fCPAmin; // minimal allowed cosine of the cascade pointing angle
58 Double_t fRmin, fRmax;// max & min radii of the fiducial volume
60 ClassDef(AliCascadeVertexer,3) // cascade verterxer
63 inline AliCascadeVertexer::AliCascadeVertexer() :
68 fDBachMin(fgDBachMin),
76 inline void AliCascadeVertexer::SetCuts(const Double_t cuts[8]) {
78 fDV0min=cuts[1]; fMassWin=cuts[2]; fDBachMin=cuts[3];
79 fDCAmax=cuts[4]; fCPAmin=cuts[5];
80 fRmin=cuts[6]; fRmax=cuts[7];
83 inline void AliCascadeVertexer::SetDefaultCuts(const Double_t cuts[8]) {
85 fgDV0min=cuts[1]; fgMassWin=cuts[2]; fgDBachMin=cuts[3];
86 fgDCAmax=cuts[4]; fgCPAmin=cuts[5];
87 fgRmin=cuts[6]; fgRmax=cuts[7];
90 inline void AliCascadeVertexer::GetCuts(Double_t cuts[8]) const {
92 cuts[1]=fDV0min; cuts[2]=fMassWin; cuts[3]=fDBachMin;
93 cuts[4]=fDCAmax; cuts[5]=fCPAmin;
94 cuts[6]=fRmin; cuts[7]=fRmax;
97 inline void AliCascadeVertexer::GetDefaultCuts(Double_t cuts[8]) {
99 cuts[1]=fgDV0min; cuts[2]=fgMassWin; cuts[3]=fgDBachMin;
100 cuts[4]=fgDCAmax; cuts[5]=fgCPAmin;
101 cuts[6]=fgRmin; cuts[7]=fgRmax;