1 #ifndef ALIITSVERTEXERPPZ_H
2 #define ALIITSVERTEXERPPZ_H
3 /* Copyright(c) 1998-2003, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
7 #include <AliITSVertexer.h>
9 /////////////////////////////////////////////////////////////////////
11 // Class for primary vertex Z coordinate reconstruction //
12 // Optimized for p-p events (in general: low multiplicity events) //
14 /////////////////////////////////////////////////////////////////////
20 class AliITSVertexerPPZ : public AliITSVertexer {
24 AliITSVertexerPPZ(TString fn, Float_t x0=0., Float_t y0=0.); // standard constructor
25 virtual ~AliITSVertexerPPZ(); // destructor
26 virtual AliESDVertex* FindVertexForCurrentEvent(Int_t event);
27 virtual void FindVertices();
28 virtual Float_t GetZFound() const {return fZFound;}
29 virtual Float_t GetZsig() const {return fZsig;}
30 virtual void PrintStatus() const;
31 virtual void SetDiffPhiMax(Float_t pm = 0.05){fDiffPhiMax = pm;}
32 virtual void SetFirstLayerModules(Int_t m1 = 0, Int_t m2 = 79){fFirstL1 = m1; fLastL1 = m2;}
33 virtual void SetSecondLayerModules(Int_t m1 = 80, Int_t m2 = 239){fFirstL2 = m1; fLastL2 = m2;}
34 virtual void SetWindow(Float_t w=3.){fWindow = w;}
35 static Float_t Curv(Double_t x1,Double_t y1, Double_t x2,Double_t y2,
36 Double_t x3,Double_t y3);
39 void EvalZ(TH1F *hist,Int_t sepa, Int_t ncoinc, TArrayF *zval);
42 Int_t fFirstL1; // first module of the first pixel layer
43 Int_t fLastL1; // last module of the first pixel layer
44 Int_t fFirstL2; // first module of the second pixel layer
45 Int_t fLastL2; // last module of the second pixel layer
46 Float_t fDiffPhiMax; // Maximum delta phi allowed among corr. pixels
47 Float_t fX0; // Nominal x coordinate of the vertex
48 Float_t fY0; // Nominal y coordinate of the vertex
49 AliITS *fITS; //! pointer to the AliITS object
50 Float_t fZFound; //! found value for the current event
51 Float_t fZsig; //! RMS of Z
52 Float_t fWindow; // window width for Z search in mm (3 mm by def.)
55 ClassDef(AliITSVertexerPPZ,2);