1 #ifndef ALIVERTEXINGHFUTILS_H
2 #define ALIVERTEXINGHFUTILS_H
7 ///////////////////////////////////////////////////////////////////
9 // Class with functions useful for different D2H analyses //
10 // - event plane resolution //
11 // - <pt> calculation with side band subtraction //
12 // - tracklet multiplicity calculation //
13 // Origin: F.Prino, Torino, prino@to.infn.it //
15 ///////////////////////////////////////////////////////////////////
19 class AliAODMCParticle;
27 class AliVertexingHFUtils : public TObject{
29 AliVertexingHFUtils();
30 AliVertexingHFUtils(Int_t k);
31 virtual ~AliVertexingHFUtils() {};
33 // Functions for Event plane resolution
34 void SetK(Int_t k){fK=k;}
35 void SetSubEvResol(Double_t res){fSubRes=res;}
36 void SetSubEventHisto(const TH1F* hSub){
37 fSubRes=GetSubEvResol(hSub);
39 Int_t GetK() const {return fK;}
40 Double_t GetSubEvResol() const {return fSubRes;}
41 Double_t Pol(Double_t x) const {return Pol(x,fK);}
42 Double_t FindChi() const {return FindChi(fSubRes,fK);}
43 Double_t GetFullEvResol() const {return GetFullEvResol(fSubRes,fK);}
44 static Double_t FindChi(Double_t res, Int_t k=1);
45 static Double_t Pol(Double_t x, Int_t k);
46 static Double_t ResolK1(Double_t x);
47 static Double_t GetSubEvResol(const TH1F* hSubEvCorr){
48 if(hSubEvCorr) return TMath::Sqrt(hSubEvCorr->GetMean());
51 static Double_t GetSubEvResolLowLim(const TH1F* hSubEvCorr){
52 if(hSubEvCorr) return TMath::Sqrt(hSubEvCorr->GetMean()-hSubEvCorr->GetMeanError());
55 static Double_t GetSubEvResolHighLim(const TH1F* hSubEvCorr){
56 if(hSubEvCorr) return TMath::Sqrt(hSubEvCorr->GetMean()+hSubEvCorr->GetMeanError());
59 static Double_t GetFullEvResol(Double_t resSub, Int_t k=1);
60 static Double_t GetFullEvResol(const TH1F* hSubEvCorr, Int_t k=1);
61 static Double_t GetFullEvResolLowLim(const TH1F* hSubEvCorr, Int_t k=1);
62 static Double_t GetFullEvResolHighLim(const TH1F* hSubEvCorr, Int_t k=1);
64 // Functions for tracklet multiplcity calculation
65 void SetEtaRangeForTracklets(Double_t mineta, Double_t maxeta){
66 fMinEtaForTracklets=mineta;
67 fMaxEtaForTracklets=maxeta;
69 static Int_t GetNumberOfTrackletsInEtaRange(AliAODEvent* ev, Double_t mineta, Double_t maxeta);
70 Int_t GetNumberOfTrackletsInEtaRange(AliAODEvent* ev) const {
71 return GetNumberOfTrackletsInEtaRange(ev,fMinEtaForTracklets,fMaxEtaForTracklets);
73 static Int_t GetGeneratedMultiplicityInEtaRange(TClonesArray* arrayMC, Double_t mineta, Double_t maxeta);
74 static Int_t GetGeneratedPrimariesInEtaRange(TClonesArray* arrayMC, Double_t mineta, Double_t maxeta);
75 static Int_t GetGeneratedPhysicalPrimariesInEtaRange(TClonesArray* arrayMC, Double_t mineta, Double_t maxeta);
77 // Functions for computing average pt
78 static void AveragePt(Float_t& averagePt, Float_t& errorPt, Float_t ptmin, Float_t ptmax, TH2F* hMassD, Float_t massFromFit, Float_t sigmaFromFit, TF1* funcB2, Float_t sigmaRangeForSig=2.5, Float_t sigmaRangeForBkg=4.5, Int_t rebin=4);
80 // Functions for computing true impact parameter of D meson
81 static Double_t GetTrueImpactParameterDzero(AliAODMCHeader *mcHeader, TClonesArray* arrayMC, AliAODMCParticle *partDp);
82 static Double_t GetTrueImpactParameterDplus(AliAODMCHeader *mcHeader, TClonesArray* arrayMC, AliAODMCParticle *partDp);
84 static Double_t GetCorrectedNtracklets(TProfile* estimatorAvg, Double_t uncorrectedNacc, Double_t vtxZ, Double_t refMult);
88 Int_t fK; // ratio of measured harmonic to event plane harmonic
89 Double_t fSubRes; // sub-event resolution = sqrt(<cos[n(phiA-phiB)] >)
90 Double_t fMinEtaForTracklets; // min eta for counting tracklets
91 Double_t fMaxEtaForTracklets; // min eta for counting tracklets
93 ClassDef(AliVertexingHFUtils,0)