1 #ifndef ALIHBTCORRECTQINVCORRELFCTN_H
2 #define ALIHBTCORRECTQINVCORRELFCTN_H
4 ///////////////////////////////////////////////////////
6 // AliHBTCorrectQInvCorrelFctn //
8 // Class for calculating Q Invariant correlation //
9 // taking to the account resolution of the //
10 // detector and coulomb effects. //
12 ///////////////////////////////////////////////////////
14 #include "AliHBTFunction.h"
16 class AliHBTCorrectedCorrelFctn: public AliHBTCorrelFunction
19 AliHBTCorrectedCorrelFctn();
20 virtual ~AliHBTCorrectedCorrelFctn(){}
23 void Smear(AliHBTPair* pair,AliHBTPair& smeared);
24 void Smear(AliVAODParticle* part, AliVAODParticle* smeared);
26 Double_t GetCoulombCorrection(AliHBTPair* /*pair*/){return 1.0;}
31 //Parameters of Pt RMS
32 //linear dependence dPt/Pt from Pt itself
33 Float_t fDPtOverPtA; //A of dPt/Pt
34 Float_t fDPtOverPtB; //A of dPt/Pt
35 Float_t fDPtOverPtAlpha; //A of dPt/Pt
36 Float_t fDPtOverPtC; //A of dPt/Pt
38 //We assume that RMS of Theta and Phisangle depends on Pt Like A+B*(Pt)^Alpha
39 //Idea copied from Star HBT Maker (Fabrice Retiere)
40 //Parameters comes from Monte Carlo Resolution Analysis
42 Float_t fThetaA; //"A" parameter of theta RMS dependence
43 Float_t fThetaB; //"B" parameter of theta RMS dependence
44 Float_t fThetaAlpha; //"Alpha" parameter (power) of theta RMS dependence
45 Float_t fThetaC; //"C" parameter of theta RMS dependence
47 Float_t fPhiA;//"A" parameter of phi RMS dependence
48 Float_t fPhiB;//"B" parameter of phi RMS dependence
49 Float_t fPhiAlpha;//"Alpha" parameter (power) of phi RMS dependence
50 Float_t fPhiC;//"C" parameter of phi RMS dependence
52 ClassDef(AliHBTCorrectedCorrelFctn,1)
56 class AliHBTCorrectQInvCorrelFctn: public AliHBTOnePairFctn1D, public AliHBTCorrectedCorrelFctn
59 AliHBTCorrectQInvCorrelFctn(const char* name = "qinvcorrectedCF",
60 const char* title= "Corrected Q_{inv} Correlation Fonction");
62 AliHBTCorrectQInvCorrelFctn(const char* name, const char* title,
63 Int_t nbins, Float_t maxXval, Float_t minXval);
65 AliHBTCorrectQInvCorrelFctn(TH1D* measqinv,
66 const char* name = "qinvcorrectedCF",
67 const char* title= "Corrected Q_{inv} Correlation Fonction");
68 AliHBTCorrectQInvCorrelFctn(const AliHBTCorrectQInvCorrelFctn& in);
70 virtual ~AliHBTCorrectQInvCorrelFctn();
72 void SetInitialValues(Double_t lambda, Double_t r);
74 void ProcessSameEventParticles(AliHBTPair* pair);//process particles from same event (real pair)
75 void ProcessDiffEventParticles(AliHBTPair* pair);//process particles coming from different events (mixed pairs)
76 void SetMeasuredHistogram(TH1D* meas){fMeasCorrelFctn = meas;}
77 TH1* GetResult();//returns the result histogram
78 Double_t GetRadius()const{ return TMath::Sqrt(fR2);}//returns assumed radius
79 Double_t GetLambda()const{ return fLambda;}//retutrns assumed intercept parameter
80 void SetRadiusConvergenceTreshold(Double_t ct){fRConvergenceTreshold=ct;}//if fitted and assumed R us different less then that number con
81 void SetLambdaConvergenceTreshold(Double_t ct){fLambdaConvergenceTreshold=ct;}
84 Double_t GetFittedRadius();
85 Double_t GetFittedLambda();
87 void SetMeasNum(TH1D* measnum){fMeasNumer = measnum;}
88 void SetMeasDen(TH1D* h){fMeasDenom = h;}
92 virtual void BuildHistos(Int_t nbins, Float_t max, Float_t min);
93 Double_t GetValue(AliHBTPair * pair) const {return pair->GetQInv();}
94 Double_t GetModelValue(Double_t qinv);
97 TH1D* fMeasCorrelFctn; //Measured correlation function
98 TH1D* fMeasNumer;//Measured numerator correlation function
99 TH1D* fMeasDenom; //Measured denominator correlation function
101 TH1D* fSmearedNumer; //! Numerator of smeard q
102 TH1D* fSmearedDenom; //! Denominator of smeard q
104 Double_t fR2;//square of radius
105 Double_t fLambda;//Interception parameter
107 Double_t fFittedR;//fitted radius
108 Double_t fFittedLambda;//fitted Interception parameter
110 Float_t fRConvergenceTreshold;//fRConvergenceTreshold
111 Float_t fLambdaConvergenceTreshold;//fLambdaConvergenceTreshold
114 ClassDef(AliHBTCorrectQInvCorrelFctn,1)
117 inline Double_t AliHBTCorrectQInvCorrelFctn::GetModelValue(Double_t qinv)
119 //factor 0.038936366329 conected with units change GeV<->SI
120 return 1.0 + fLambda*TMath::Exp(-fR2*qinv*qinv/0.038936366329);