1 #ifndef ALIITSVERTEXER3D_H
2 #define ALIITSVERTEXER3D_H
4 #include<AliITSVertexer.h>
6 ///////////////////////////////////////////////////////////////////
8 // Class for primary vertex finding (3D reconstruction) //
10 ///////////////////////////////////////////////////////////////////
14 #include <TClonesArray.h>
16 #include <AliESDVertex.h>
20 class AliITSVertexer3D : public AliITSVertexer {
24 AliITSVertexer3D(Double_t zcut=0.);
25 AliITSVertexer3D(TRootIOCtor* );
26 virtual ~AliITSVertexer3D();
27 virtual AliESDVertex* FindVertexForCurrentEvent(TTree *itsClusterTree);
28 void FindVertex3DIterative();
29 void FindVertex3DIterativeMM();
30 void FindVertex3D(TTree *itsClusterTree);
31 AliESDVertex GetVertex3D() const {return fVert3D;}
32 // Double_t *Get3DPeak() {return f3DPeak;}
33 virtual void PrintStatus() const;
34 static Bool_t DistBetweenVertices(AliESDVertex &a, AliESDVertex &b, Double_t test, Double_t &dist);
35 void SetWideFiducialRegion(Double_t dz = 40.0, Double_t dr=2.5){
39 void SetNarrowFiducialRegion(Double_t dz = 0.5, Double_t dr=0.5){
43 void SetDeltaPhiCuts(Double_t dphiloose=0.5, Double_t dphitight=0.025){
44 SetCoarseDiffPhiCut(dphiloose);
45 SetDiffPhiMax(dphitight);
47 void SetCoarseDiffPhiCut(Double_t dphi = 0.5){fCoarseDiffPhiCut=dphi;}
48 void SetFineDiffPhiCut(Double_t dphi = 0.05){fFineDiffPhiCut=dphi;}
49 void SetCutOnPairs(Double_t cp = 0.15){fCutOnPairs = cp;}
50 void SetCoarseMaxRCut(Double_t rad = 2.5){fCoarseMaxRCut=rad;}
51 void SetMaxRCut(Double_t rad = 0.5){fMaxRCut=rad;}
52 void SetMaxRCutAlgo2(Double_t rad = 0.2){fMaxRCut2=rad;}
53 void SetZCutDiamond(Double_t zcut = 40.0);
54 void SetMaxZCut(Double_t dz = 0.5){fMaxZCut=dz;}
55 void SetDCACut(Double_t dca=0.1){fDCAcut=dca;}
56 void SetDiffPhiMax(Double_t pm = 0.025){fDiffPhiMax = pm;}
57 void SetMeanPSelTracks(Double_t pGeV=0.875){fMeanPSelTrk = pGeV;}
58 void SetMeanPtSelTracks(Double_t ptGeV=0.630){fMeanPtSelTrk = ptGeV;}
59 void SetMeanPPtSelTracks(Double_t fieldTesla);
60 void SetMinDCAforPileup(Double_t mindist=0.1) {fDCAforPileup=mindist;}
61 void SetDeltaPhiforPileup(Double_t dphi=0.01) {fDiffPhiforPileup=dphi;}
62 void SetPileupAlgo(UShort_t optalgo=1){fPileupAlgo=optalgo;}
63 void SetBinSizeR(Double_t siz=0.1){fBinSizeR=siz;}
64 void SetBinSizeZ(Double_t siz=0.8){fBinSizeZ=siz;}
65 void SetHighMultAlgo(UChar_t n){
66 if(n<2) fHighMultAlgo=n;
67 else AliError("Only algos 0 and 1 implemented");
69 void SetHighMultDownscalingAlgo(){fHighMultAlgo=0;}
70 void SetHighMultTracesAlgo(){fHighMultAlgo=1;}
72 void SetMaxNumOfClustersForHighMult(Int_t ncl){fMaxNumOfCl=ncl;}
73 void SetMaxNumOfClustersForDownScale(Int_t ncl){fMaxNumOfClForDownScale=ncl;}
74 void SetMaxNumOfClustersForRebin(Int_t ncl){fMaxNumOfClForRebin=ncl;}
75 Int_t GetMaxNumOfClustersForHighMult() const {return fMaxNumOfCl;}
76 Int_t GetMaxNumOfClustersForDownScale() const {return fMaxNumOfClForDownScale;}
77 Int_t GetMaxNumOfClustersForRebin() const {return fMaxNumOfClForRebin;}
80 AliITSVertexer3D(const AliITSVertexer3D& vtxr);
81 AliITSVertexer3D& operator=(const AliITSVertexer3D& /* vtxr */);
82 Int_t FindTracklets(TTree *itsClusterTree, Int_t optCuts);
83 Int_t Prepare3DVertex(Int_t optCuts);
84 Int_t Prepare3DVertexPbPb();
86 void FindPeaks(TH3F* histo, Double_t *peak, Int_t &nOfTracklets, Int_t &nOfTimes);
88 void MarkUsedClusters();
89 Int_t RemoveTracklets();
90 void FindOther3DVertices(TTree *itsClusterTree);
91 Double_t GetFraction(Int_t itr) const;
93 enum {kMaxCluPerMod=250};
94 enum {kMaxPileupVertices=10};
95 TClonesArray fLines; //! array of tracklets
96 AliESDVertex fVert3D; // 3D Vertex
97 Double_t fCoarseDiffPhiCut; // loose cut on DeltaPhi for RecPoint matching
98 Double_t fFineDiffPhiCut; // tight value of DeltaPhi for RP matching (2nd method)
99 Double_t fCutOnPairs; //cut on distance between pairs of tracklets
100 Double_t fCoarseMaxRCut; // cut on tracklet DCA to Z axis
101 Double_t fMaxRCut; // cut on tracklet DCA to beam axis
102 Double_t fMaxRCut2; // cut on tracklet DCA to beam axis - algo2
103 Double_t fZCutDiamond; // cut on +-Z of the diamond
104 Double_t fMaxZCut; // cut on Z distance from estimated vertex
105 Double_t fDCAcut; // cut on tracklet to tracklet and tracklet to vertex DCA
106 Double_t fDiffPhiMax; // Maximum delta phi allowed among corr. pixels
107 Double_t fMeanPSelTrk; // GeV, mean P for tracks with dphi<0.01 rad
108 Double_t fMeanPtSelTrk; // GeV, mean Pt for tracks with dphi<0.01 rad
109 TBits fUsedCluster; // flag for used clusters in vertex calculation
110 TH1F *fZHisto; //! histogram with coarse z distribution
111 Double_t fDCAforPileup; // Minimum DCA to 1st vertex for pileup tracklets
112 Double_t fDiffPhiforPileup; // Cut on delta phi for pileup
113 Double_t fBinSizeR; // Histo3D bin size along radius
114 Double_t fBinSizeZ; // Histo3D bin size along z
115 UShort_t fPileupAlgo; // Algo for pileup identification
116 // 0->VertexerZ pileup algo
117 // 1->Unused RecPoints algo
118 Int_t fMaxNumOfCl; // max n. of clusters on L1 or L2 for high mult definition
119 Int_t fMaxNumOfClForRebin; // max n. of clusters on L1 or L2 for rebin
120 Int_t fMaxNumOfClForDownScale; // max n. of clusters on L1 or L2 for downscale
121 Int_t fNRecPLay1; // number of rec ponts on SPD layer 1
122 Int_t fNRecPLay2; // number of rec ponts on SPD layer 2
123 Float_t f3DBinSize; // Size of the 3D bins
124 Bool_t fDoDownScale; // Control downscaling of tracklets in high mult
125 TRandom3 *fGenerForDownScale; // randomnumber generator fordownscaling
126 Double_t f3DPeak[3]; // TH3F peak coords
127 UChar_t fHighMultAlgo; // algorithm used for high mult. events
128 Bool_t fSwitchAlgorithm; // Switch between two algoritms in testing phase
130 static const Int_t fgkMaxNumOfClDefault; // Default max n. of clusters for downscale
131 static const Int_t fgkMaxNumOfClRebinDefault; // Default max n. of clusters for rebin
132 static const Int_t fgkMaxNumOfClDownscaleDefault; // Default max n. of clusters for rebin
133 static const Float_t fgk3DBinSizeDefault; // Default 3D bins size
135 ClassDef(AliITSVertexer3D,15);