1 #ifndef ALIDIELECTRONSIGNALBASE_H
2 #define ALIDIELECTRONSIGNALBASE_H
4 /* Copyright(c) 1998-2009, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice */
7 //#############################################################
9 //# Class AliDielectronSignalBase #
10 //# Manage Cuts on the legs of the pair #
13 //# Anton Andronic, GSI / A.Andronic@gsi.de #
14 //# Ionut C. Arsene, GSI / I.C.Arsene@gsi.de #
15 //# Julian Book, Uni Ffm / Julian.Book@cern.ch #
16 //# Frederick Kramer, Uni Ffm, / Frederick.Kramer@cern.ch #
17 //# Magnus Mager, CERN / Magnus.Mager@cern.ch #
18 //# WooJin J. Park, GSI / W.J.Park@gsi.de #
19 //# Jens Wiechula, Uni HD / Jens.Wiechula@cern.ch #
21 //#############################################################
32 class AliDielectronSignalBase : public TNamed {
34 enum EBackgroundMethod {
45 AliDielectronSignalBase();
46 AliDielectronSignalBase(const char*name, const char* title);
48 virtual ~AliDielectronSignalBase();
50 void SetIntegralRange(Double_t min, Double_t max) {fIntMin=min;fIntMax=max;}
51 void SetFitRange(Double_t min, Double_t max) {fFitMin=min; fFitMax=max;}
52 void SetRebin(Int_t factor) {fRebin = factor;}
53 void SetMethod(EBackgroundMethod method) {fMethod = method;}
54 Int_t GetMethod() const { return (Int_t)fMethod; }
56 const TVectorD& GetValues() const {return fValues;}
57 const TVectorD& GetErrors() const {return fErrors;}
59 Double_t GetIntegralMin() const { return fIntMin; }
60 Double_t GetIntegralMax() const { return fIntMax; }
61 Double_t GetSignal() const { return fValues(0);}
62 Double_t GetSignalError() const { return fErrors(0);}
63 Double_t GetBackground() const { return fValues(1);}
64 Double_t GetBackgroundError() const { return fErrors(1);}
65 Double_t GetSignificance() const { return fValues(2);}
66 Double_t GetSignificanceError() const { return fErrors(2);}
67 Double_t GetSB() const { return fValues(3);}
68 Double_t GetSBError() const { return fErrors(3);}
69 Double_t GetMass() const { return fValues(4);}
70 Double_t GetMassError() const { return fErrors(4);}
71 Double_t GetMassWidth() const { return fValues(5);}
72 Double_t GetMassWidthError() const { return fErrors(5);}
74 TH1* GetSignalHistogram() const {return fHistSignal;}
75 TH1* GetBackgroundHistogram() const {return fHistBackground;}
76 TH1* GetUnlikeSignHistogram() const {return fHistDataPM;}
77 TH1* GetRfactorHistogram() const {return fHistRfactor;}
79 void SetScaleRawToBackground(Double_t intMin, Double_t intMax) { fScaleMin=intMin; fScaleMax=intMax; }
80 Double_t GetScaleFactor() const { return fScaleFactor; }
82 void SetMixingCorrection(Bool_t mixcorr=kTRUE) { fMixingCorr=mixcorr; }
84 static Double_t ScaleHistograms(TH1* histRaw, TH1* histBackground, Double_t intMin, Double_t intMax);
86 virtual void Print(Option_t *option="") const;
89 This function needs to be implemented by the signal extraction classes.
90 Here all the work should be done.
92 The signal extraction is done on the mass spectra.
93 The TObjArray should contain the Inv. Mass spectra of the 10 possible combinations
94 for single and mixed events defined in AliDielectron.cxx
96 virtual void Process(TObjArray * const /*arrhist*/) = 0;
100 TH1 *fHistSignal; // histogram of pure signal
101 TH1 *fHistBackground; // histogram of background (fitted=0, like-sign=1, event mixing=2)
102 TH1 *fHistDataPM; // histogram of selected +- pair candidates
103 TH1 *fHistDataPP; // histogram of selected ++ pair candidates
104 TH1 *fHistDataMM; // histogram of selected -- pair candidates
105 TH1 *fHistDataME; // histogram of selected +- pair candidates from mixed event
106 TH1 *fHistRfactor; // histogram of R factors
108 TVectorD fValues; // values
109 TVectorD fErrors; // value errors
111 Double_t fIntMin; // signal extraction range min
112 Double_t fIntMax; // signal extraction range max
113 Double_t fFitMin; // fit range lowest inv. mass
114 Double_t fFitMax; // fit range highest inv. mass
116 Int_t fRebin; // histogram rebin factor
117 EBackgroundMethod fMethod; // method for background substraction
118 Double_t fScaleMin; // min for scaling of raw and background histogram
119 Double_t fScaleMax; // max for scaling of raw and background histogram
120 Double_t fScaleFactor; // scale factor of raw to background histogram scaling
121 Bool_t fMixingCorr; // switch for bin by bin correction with R factor
123 Bool_t fProcessed; // flag
125 void SetSignificanceAndSOB(); // calculate the significance and S/B
126 TPaveText* DrawStats(Double_t x1=0., Double_t y1=0., Double_t x2=0., Double_t y2=0.);
128 AliDielectronSignalBase(const AliDielectronSignalBase &c);
129 AliDielectronSignalBase &operator=(const AliDielectronSignalBase &c);
131 ClassDef(AliDielectronSignalBase,4) // Dielectron SignalBase
134 inline void AliDielectronSignalBase::SetSignificanceAndSOB()
137 // Calculate S/B and significance
140 fValues(3) = (fValues(1)>0 ? fValues(0)/fValues(1) : 0);
141 Float_t epsSig = (fValues(0)>0 ? fErrors(0)/fValues(0) : 0);
142 Float_t epsBknd = (fValues(1)>0 ? fErrors(1)/fValues(1) : 0);
143 fErrors(3) = fValues(3)*TMath::Sqrt(epsSig*epsSig + epsBknd*epsBknd);
145 fValues(2) = ((fValues(0)+fValues(1))>0 ? fValues(0)/TMath::Sqrt(fValues(0)+fValues(1)) : 0);
146 Float_t s = fValues(0); Float_t b = fValues(1);
147 fErrors(2) = ((s+b)>0 ? TMath::Sqrt((s*(s+2*b)*(s+2*b)+b*s*s)/(4*TMath::Power(s+b,3))) : 0);