Missing protection in case no interactions are generated within the orbit. Thanks...
[u/mrichter/AliRoot.git] / ITS / AliITSVertexer3D.h
CommitLineData
70c95f95 1#ifndef ALIITSVERTEXER3D_H
2#define ALIITSVERTEXER3D_H
3
27167524 4#include<AliITSVertexer.h>
70c95f95 5
6///////////////////////////////////////////////////////////////////
7// //
8// Class for primary vertex finding (3D reconstruction) //
9// //
10///////////////////////////////////////////////////////////////////
11
6a0d56b8 12/* $Id$ */
13
f5f6da22 14#include <TClonesArray.h>
6a0d56b8 15#include <AliESDVertex.h>
7340864d 16#include <TH3F.h>
cd1c2af1 17#include <TBits.h>
70c95f95 18
19class AliITSVertexer3D : public AliITSVertexer {
20
21 public:
22
23 AliITSVertexer3D();
70c95f95 24 virtual ~AliITSVertexer3D();
308c2f7c 25 virtual AliESDVertex* FindVertexForCurrentEvent(TTree *itsClusterTree);
6a0d56b8 26 AliESDVertex GetVertex3D() const {return fVert3D;}
70c95f95 27 virtual void PrintStatus() const;
d8ba9ddf 28 void SetWideFiducialRegion(Float_t dz = 20.0, Float_t dr=2.5){
7203e11a 29 SetCoarseMaxRCut(dr);
30 SetZCutDiamond(dz);
31 }
32 void SetNarrowFiducialRegion(Float_t dz = 0.5, Float_t dr=0.5){
33 SetMaxRCut(dr);
34 SetMaxZCut(dz);
35 }
36 void SetDeltaPhiCuts(Float_t dphiloose=0.5, Float_t dphitight=0.01){
37 SetCoarseDiffPhiCut(dphiloose);
38 SetDiffPhiMax(dphitight);
39 }
70c95f95 40 void SetCoarseDiffPhiCut(Float_t dphi = 0.5){fCoarseDiffPhiCut=dphi;}
05d1294c 41 void SetCoarseMaxRCut(Float_t rad = 2.5){fCoarseMaxRCut=rad;}
42 void SetMaxRCut(Float_t rad = 0.5){fMaxRCut=rad;}
d8ba9ddf 43 void SetZCutDiamond(Float_t zcut = 20.0){fZCutDiamond=zcut;}
05d1294c 44 void SetMaxZCut(Float_t dz = 0.5){fMaxZCut=dz;}
7203e11a 45 void SetDCACut(Float_t dca=0.1){fDCAcut=dca;}
70c95f95 46 void SetDiffPhiMax(Float_t pm = 0.01){fDiffPhiMax = pm;}
6a0d56b8 47 void SetMeanPSelTracks(Float_t pGeV=0.875){fMeanPSelTrk = pGeV;}
48 void SetMeanPtSelTracks(Float_t ptGeV=0.630){fMeanPtSelTrk = ptGeV;}
49 void SetMeanPPtSelTracks(Float_t fieldTesla);
cd1c2af1 50 void SetMinDCAforPileup(Float_t mindist=0.1) {fDCAforPileup=mindist;}
51 void SetPileupAlgo(UShort_t optalgo=0){fPileupAlgo=optalgo;}
70c95f95 52
53protected:
54 AliITSVertexer3D(const AliITSVertexer3D& vtxr);
55 AliITSVertexer3D& operator=(const AliITSVertexer3D& /* vtxr */);
308c2f7c 56 Int_t FindTracklets(TTree *itsClusterTree, Int_t optCuts);
05d1294c 57 Int_t Prepare3DVertex(Int_t optCuts);
27167524 58 void ResetVert3D();
7340864d 59 void FindPeaks(TH3F* histo, Double_t *peak, Int_t &nOfTracklets, Int_t &nOfTimes);
cd1c2af1 60 void PileupFromZ();
61 void MarkUsedClusters();
62 Int_t RemoveTracklets();
63 void FindOther3DVertices(TTree *itsClusterTree);
70c95f95 64
cd1c2af1 65 enum {kMaxCluPerMod=250};
6a0d56b8 66
f5f6da22 67 TClonesArray fLines; //! array of tracklets
6a0d56b8 68 AliESDVertex fVert3D; // 3D Vertex
70c95f95 69 Float_t fCoarseDiffPhiCut; // loose cut on DeltaPhi for RecPoint matching
05d1294c 70 Float_t fCoarseMaxRCut; // cut on tracklet DCA to Z axis
71 Float_t fMaxRCut; // cut on tracklet DCA to beam axis
70c95f95 72 Float_t fZCutDiamond; // cut on +-Z of the diamond
05d1294c 73 Float_t fMaxZCut; // cut on Z distance from estimated vertex
70c95f95 74 Float_t fDCAcut; // cut on tracklet to tracklet and tracklet to vertex DCA
75 Float_t fDiffPhiMax; // Maximum delta phi allowed among corr. pixels
6a0d56b8 76 Float_t fMeanPSelTrk; // GeV, mean P for tracks with dphi<0.01 rad
77 Float_t fMeanPtSelTrk; // GeV, mean Pt for tracks with dphi<0.01 rad
cd1c2af1 78 TBits fUsedCluster; // flag for used clusters in vertex calculation
79 TH1F *fZHisto; //! histogram with coarse z distribution
80 Float_t fDCAforPileup; // Minimum DCA to 1st vertex for pileup tracklets
81 UShort_t fPileupAlgo; // Algo for pileup identification
82 // 0->VertexerZ pileup algo
83 // 1->Unused RecPoints algo
6a0d56b8 84
cd1c2af1 85 ClassDef(AliITSVertexer3D,7);
70c95f95 86
87};
88
89#endif