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d681bb2d | 1 | #ifndef ALIESDVERTEX_H |
2 | #define ALIESDVERTEX_H | |
0fc5cc25 | 3 | /* Copyright(c) 1998-2003, ALICE Experiment at CERN, All rights reserved. * |
c5f0f3c1 | 4 | * See cxx source for full Copyright notice */ |
504de69b | 5 | |
2257f27e | 6 | /* $Id$ */ |
c5f0f3c1 | 7 | |
8 | //------------------------------------------------------- | |
9 | // Primary Vertex Class | |
10 | // | |
11 | // Origin: A.Dainese, Padova, andrea.dainese@pd.infn.it | |
12 | //------------------------------------------------------- | |
13 | ||
14 | /***************************************************************************** | |
15 | * * | |
16 | * This class deals with primary vertex. * | |
d681bb2d | 17 | * AliESDVertex objects are created by the class AliITSVertexer and its * |
c5f0f3c1 | 18 | * derived classes. * |
19 | * Different constructors are provided: * | |
20 | * - for primary vertex determined with pixels in pp (only Z) * | |
21 | * - for primary vertex determined with pixels in ion-ion (X,Y,Z) * | |
22 | * - for primary vertex determined with ITS tracks in pp (X,Y,Z) * | |
d681bb2d | 23 | * This class replaces the previous version of AliESDVertex, designed * |
c5f0f3c1 | 24 | * originally only for A-A collisions. The functionalities of the old class * |
25 | * are maintained in the AliITSVertexerIons class * | |
26 | * * | |
27 | *****************************************************************************/ | |
28 | ||
29 | //---- Root headers ----- | |
30 | #include <TNamed.h> | |
31 | ||
d681bb2d | 32 | class AliESDVertex : public TNamed { |
504de69b | 33 | |
34 | public: | |
35 | ||
d681bb2d | 36 | AliESDVertex(); |
37 | AliESDVertex(Double_t positionZ,Double_t sigmaZ,Int_t nContributors, | |
11ba84a4 | 38 | Char_t *vtxName="Vertex"); |
d681bb2d | 39 | AliESDVertex(Double_t position[3],Double_t covmatrix[6], |
c5f0f3c1 | 40 | Double_t chi2,Int_t nContributors, |
11ba84a4 | 41 | Char_t *vtxName="Vertex"); |
d681bb2d | 42 | AliESDVertex(Double_t position[3],Double_t sigma[3], |
11ba84a4 | 43 | Char_t *vtxName="Vertex"); |
d681bb2d | 44 | AliESDVertex(Double_t position[3],Double_t sigma[3],Double_t snr[3], |
11ba84a4 | 45 | Char_t *vtxName="Vertex"); |
c5f0f3c1 | 46 | |
d681bb2d | 47 | virtual ~AliESDVertex(); |
c5f0f3c1 | 48 | |
49 | ||
50 | void GetXYZ(Double_t position[3]) const; | |
51 | void GetSigmaXYZ(Double_t sigma[3]) const; | |
52 | void GetCovMatrix(Double_t covmatrix[6]) const; | |
53 | void GetSNR(Double_t snr[3]) const; | |
54 | ||
c5f0f3c1 | 55 | Double_t GetXv() const; |
56 | Double_t GetYv() const; | |
57 | Double_t GetZv() const; | |
58 | Double_t GetXRes() const; | |
59 | Double_t GetYRes() const; | |
60 | Double_t GetZRes() const; | |
61 | Double_t GetXSNR() const { return fSNR[0]; } | |
62 | Double_t GetYSNR() const { return fSNR[1]; } | |
63 | Double_t GetZSNR() const { return fSNR[2]; } | |
64 | ||
c5f0f3c1 | 65 | Double_t GetChi2() const { return fChi2; } |
66 | Double_t GetChi2toNDF() const | |
67 | { return fChi2/(2.*(Double_t)fNContributors-3.); } | |
68 | Int_t GetNContributors() const { return fNContributors; } | |
69 | ||
70 | void PrintStatus() const; | |
71 | void SetDebug(Int_t dbg = 0) { fDebug = dbg; return; } | |
0fc5cc25 | 72 | void SetTruePos(Double_t *tp){for(Int_t i=0;i<3;i++)fTruePos[i]=tp[i];} |
73 | void GetTruePos(Double_t &x,Double_t &y,Double_t &z) const | |
74 | {x=fTruePos[0]; y=fTruePos[1]; z=fTruePos[2];} | |
504de69b | 75 | |
76 | private: | |
0fc5cc25 | 77 | |
78 | void SetToZero(); | |
79 | ||
80 | protected: | |
81 | ||
c5f0f3c1 | 82 | Double_t fPosition[3]; // vertex position |
83 | Double_t fCovXX,fCovXY,fCovYY,fCovXZ,fCovYZ,fCovZZ; // vertex covariance matrix | |
84 | Double_t fSNR[3]; // S/N ratio | |
c5f0f3c1 | 85 | Double_t fChi2; // chi2 of vertex fit |
86 | Int_t fNContributors; // # of tracklets/tracks used for the estimate | |
87 | Int_t fDebug; //! for debugging | |
0fc5cc25 | 88 | Double_t fTruePos[3]; //true vertex position (for comparison purposes) |
d681bb2d | 89 | ClassDef(AliESDVertex,4) // Class for Primary Vertex |
c5f0f3c1 | 90 | }; |
504de69b | 91 | |
92 | #endif | |
c5f0f3c1 | 93 | |
94 | ||
95 | ||
96 | ||
97 | ||
98 | ||
99 |