1 #ifndef ALIANALYSISUTILS_H
2 #define ALIANALYSISUTILS_H
4 ////////////////////////////////////////////////////////////////////
6 // Class with functions useful for different analyses //
7 // - vertex selection //
8 // * 2013 pA default cuts //
9 // - identification of the fist event of the chunk //
10 // - identification pileup events //
12 ///////////////////////////////////////////////////////////////////
19 class AliAnalysisUtils : public TObject {
24 virtual ~AliAnalysisUtils(){};
26 Bool_t IsVertexSelected2013pA(AliVEvent *event);
27 Bool_t IsFirstEventInChunk(AliVEvent *event);
29 Bool_t IsPileUpEvent(AliVEvent *event); //to be used in the analysis
30 Bool_t IsPileUpMV(AliVEvent *event); //MV pileup selection implemented here
31 Bool_t IsPileUpSPD(AliVEvent *event); //this calls IsPileUpFromSPD
32 Bool_t IsOutOfBunchPileUp(AliVEvent *event); //out-of-bunch pileup rejection using trigger information
33 Bool_t IsSPDClusterVsTrackletBG(AliVEvent *event); // background rejection with cluster-vs-tracklet cut
35 Double_t GetWDist(const AliVVertex* v0, const AliVVertex* v1);
37 void SetMinVtxContr(Int_t contr=1) {fMinVtxContr=contr;}
38 void SetMaxVtxZ(Float_t z=1e6) {fMaxVtxZ=z;}
39 void SetCutOnZVertexSPD(Bool_t iscut=true) { fCutOnZVertexSPD = iscut; }
41 //general pileup selection settings
42 void SetUseMVPlpSelection(Bool_t useMVPlpSelection) { fUseMVPlpSelection = useMVPlpSelection;}
43 void SetUseOutOfBunchPileUp(Bool_t useOutOfBunchPileUp) { fUseOutOfBunchPileUp = useOutOfBunchPileUp;}
45 //Multi Vertex pileup selection
46 void SetMinPlpContribMV(Int_t minPlpContribMV) { fMinPlpContribMV = minPlpContribMV;}
47 void SetMaxPlpChi2MV(Float_t maxPlpChi2MV) { fMaxPlpChi2MV = maxPlpChi2MV;}
48 void SetMinWDistMV(Float_t minWDistMV) { fMinWDistMV = minWDistMV;}
49 void SetCheckPlpFromDifferentBCMV(Bool_t checkPlpFromDifferentBCMV) { fCheckPlpFromDifferentBCMV = checkPlpFromDifferentBCMV;}
51 void SetMinPlpContribSPD(Int_t minPlpContribSPD) { fMinPlpContribSPD = minPlpContribSPD;}
52 void SetMinPlpZdistSPD(Float_t minPlpZdistSPD) { fMinPlpZdistSPD = minPlpZdistSPD;}
53 void SetnSigmaPlpZdistSPD(Float_t nSigmaPlpZdistSPD) { fnSigmaPlpZdistSPD = nSigmaPlpZdistSPD;}
54 void SetnSigmaPlpDiamXYSPD(Float_t nSigmaPlpDiamXYSPD) { fnSigmaPlpDiamXYSPD = nSigmaPlpDiamXYSPD;}
55 void SetnSigmaPlpDiamZSPD(Float_t nSigmaPlpDiamZSPD) { fnSigmaPlpDiamZSPD = nSigmaPlpDiamZSPD;}
56 void SetUseSPDCutInMultBins(Bool_t useSPDCutInMultBins) { fUseSPDCutInMultBins = useSPDCutInMultBins;}
58 // SPD cluster-vs-tracklet cut
59 void SetASPDCvsTCut(Float_t a) { fASPDCvsTCut = a; }
60 void SetBSPDCvsTCut(Float_t b) { fBSPDCvsTCut = b; }
64 Bool_t fisAOD; // flag for AOD:1 or ESD:0
66 Int_t fMinVtxContr; // minimum vertex contributors
67 Float_t fMaxVtxZ; // maximum |z| of primary vertex
69 Bool_t fCutOnZVertexSPD; // 0: no cut, 1: |zvtx-SPD - zvtx-TPC|<0.5cm
71 Bool_t fUseMVPlpSelection; //switch between SPD and MV pileup
72 Bool_t fUseOutOfBunchPileUp; //BC information from the trigger is used to tag out-of-bunch pileup
74 Int_t fMinPlpContribMV; //minimum contributors to the pilup vertices, multi-vertex
75 Float_t fMaxPlpChi2MV; //minimum value of Chi2perNDF of the pileup vertex, multi-vertex
76 Float_t fMinWDistMV; //minimum of the sqrt of weighted distance between the primary and the pilup vertex, multi-vertex
77 Bool_t fCheckPlpFromDifferentBCMV; //pileup from different BC (Bunch Crossings)
79 Int_t fMinPlpContribSPD; //minimum contributors to the pilup vertices, SPD
80 Float_t fMinPlpZdistSPD; //minimum distance for the SPD pileup vertex
81 Float_t fnSigmaPlpZdistSPD; //cut on Z for SPD pileup
82 Float_t fnSigmaPlpDiamXYSPD; //cut on nsigma diamond XY for SPD pileup
83 Float_t fnSigmaPlpDiamZSPD; //cut on nsigma diamond Z for SPD pileup
84 Bool_t fUseSPDCutInMultBins; //use IsPileupFromSPDInMultBins instead of IsPileupFromSPD
86 Float_t fASPDCvsTCut; // constant for the linear cut in SPD clusters vs tracklets
87 Float_t fBSPDCvsTCut; // slope for the linear cut in SPD clusters vs tracklets
89 ClassDef(AliAnalysisUtils,2) // base helper class