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1 | #ifndef ALIESDVERTEX_H | |
2 | #define ALIESDVERTEX_H | |
3 | /* Copyright(c) 1998-2003, ALICE Experiment at CERN, All rights reserved. * | |
4 | * See cxx source for full Copyright notice */ | |
5 | ||
6 | /* $Id$ */ | |
7 | ||
8 | //------------------------------------------------------- | |
9 | // Primary Vertex Class | |
10 | // for the Event Data Summary Class | |
11 | // Origin: A.Dainese, Padova, andrea.dainese@pd.infn.it | |
12 | //------------------------------------------------------- | |
13 | ||
14 | /***************************************************************************** | |
15 | * * | |
16 | * This class deals with primary vertex. * | |
17 | * AliESDVertex objects are created by the class AliITSVertexer and its * | |
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) * | |
23 | * This class replaces the previous version of AliESDVertex, designed * | |
24 | * originally only for A-A collisions. The functionalities of the old class * | |
25 | * are maintained in the AliITSVertexerIons class * | |
26 | * * | |
27 | *****************************************************************************/ | |
28 | ||
29 | #include <TMath.h> | |
30 | ||
31 | #include "AliVertex.h" | |
32 | ||
33 | class AliESDVertex : public AliVertex { | |
34 | ||
35 | public: | |
36 | ||
37 | AliESDVertex(); | |
38 | AliESDVertex(Double_t positionZ,Double_t sigmaZ,Int_t nContributors, | |
39 | const Char_t *vtxName="Vertex"); | |
40 | AliESDVertex(Double_t position[3],Double_t covmatrix[6], | |
41 | Double_t chi2,Int_t nContributors, | |
42 | const Char_t *vtxName="Vertex"); | |
43 | AliESDVertex(Double_t position[3],Double_t sigma[3], | |
44 | const Char_t *vtxName="Vertex"); | |
45 | AliESDVertex(Double_t position[3],Double_t sigma[3],Double_t snr[3], | |
46 | const Char_t *vtxName="Vertex"); | |
47 | AliESDVertex(const AliESDVertex &source); | |
48 | AliESDVertex &operator=(const AliESDVertex &source); | |
49 | ||
50 | virtual ~AliESDVertex() {} | |
51 | ||
52 | ||
53 | void GetSigmaXYZ(Double_t sigma[3]) const; | |
54 | void GetCovMatrix(Double_t covmatrix[6]) const; | |
55 | void GetSNR(Double_t snr[3]) const; | |
56 | ||
57 | Double_t GetXRes() const {return TMath::Sqrt(fCovXX);} | |
58 | Double_t GetYRes() const {return TMath::Sqrt(fCovYY);} | |
59 | Double_t GetZRes() const {return TMath::Sqrt(fCovZZ);} | |
60 | Double_t GetXSNR() const { return fSNR[0]; } | |
61 | Double_t GetYSNR() const { return fSNR[1]; } | |
62 | Double_t GetZSNR() const { return fSNR[2]; } | |
63 | ||
64 | Double_t GetChi2() const { return fChi2; } | |
65 | Double_t GetChi2toNDF() const | |
66 | { return fChi2/(2.*(Double_t)fNContributors-3.); } | |
67 | ||
68 | void Print(Option_t* option = "") const; | |
69 | void PrintStatus() const {Print();} | |
70 | ||
71 | void Reset() { SetToZero(); SetName("Vertex"); } | |
72 | ||
73 | protected: | |
74 | ||
75 | Double32_t fCovXX,fCovXY,fCovYY,fCovXZ,fCovYZ,fCovZZ; // vertex covariance matrix | |
76 | Double32_t fSNR[3]; // S/N ratio | |
77 | Double32_t fChi2; // chi2 of vertex fit | |
78 | ||
79 | private: | |
80 | ||
81 | void SetToZero(); | |
82 | ||
83 | ClassDef(AliESDVertex,6) // Class for Primary Vertex | |
84 | }; | |
85 | ||
86 | #endif | |
87 | ||
88 | ||
89 | ||
90 | ||
91 | ||
92 | ||
93 |