1 #ifndef ALIHBTCORRECTCORRELFCTN_H
2 #define ALIHBTCORRECTCORRELFCTN_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 AliHBTCorrectQInvCorrelFctn: public AliHBTOnePairFctn1D
19 AliHBTCorrectQInvCorrelFctn(const char* name = "qinvcorrectedCF",
20 const char* title= "Corrected Q_{inv} Correlation Fonction");
22 AliHBTCorrectQInvCorrelFctn(const char* name, const char* title,
23 Int_t nbins, Float_t maxXval, Float_t minXval);
25 AliHBTCorrectQInvCorrelFctn(TH1D* measqinv,
26 const char* name = "qinvcorrectedCF",
27 const char* title= "Corrected Q_{inv} Correlation Fonction");
28 virtual ~AliHBTCorrectQInvCorrelFctn();
29 void SetInitialValues(Double_t lambda, Double_t r);
31 void ProcessSameEventParticles(AliHBTPair* pair);//process particles from same event (real pair)
32 void ProcessDiffEventParticles(AliHBTPair* pair);//process particles coming from different events (mixed pairs)
33 void SetMeasuredHistogram(TH1D* meas){fMeasCorrelFctn = meas;}
34 TH1* GetResult();//returns the result histogram
35 Double_t GetRadius()const{ return TMath::Sqrt(fR2);}//returns assumed radius
36 Double_t GetLambda()const{ return fLambda;}//retutrns assumed intercept parameter
37 void SetRadiusConvergenceTreshold(Double_t ct){fRConvergenceTreshold=ct;}//if fitted and assumed R us different less then that number con
38 void SetLambdaConvergenceTreshold(Double_t ct){fLambdaConvergenceTreshold=ct;}
41 Double_t GetFittedRadius();
42 Double_t GetFittedLambda();
44 void SetMeasNum(TH1D* measnum){fMeasNumer = measnum;}
45 void SetMeasDen(TH1D* h){fMeasDenom = h;}
48 virtual void BuildHistos(Int_t nbins, Float_t max, Float_t min);
49 Double_t GetCoulombCorrection(AliHBTPair* pair){return 1.0;}
50 Double_t GetValue(AliHBTPair * pair){return pair->GetQInv();}
51 void Smear(AliHBTPair* pair,AliHBTPair& smeared);
52 void Smear(AliHBTParticle* part, AliHBTParticle* smeared);
53 Double_t GetModelValue(Double_t qinv);
56 TH1D* fMeasCorrelFctn;
60 TH1D* fSmearedNumer; //! Numerator of smeard q
61 TH1D* fSmearedDenom; //! Denominator of smeard q
63 //Parameters of Pt RMS
64 //linear dependence dPt/Pt from Pt itself
65 Float_t fDPtOverPtRMS; //RMS of dPt/Pt
67 //We assume that RMS of Theta and Phisangle depends on Pt Like A+B*(Pt)^Alpha
68 //Idea copied from Star HBT Maker (Fabrice Retiere)
69 //Parameters comes from Monte Carlo Resolution Analysis
71 Float_t fThetaA; //"A" parameter of theta RMS dependence
72 Float_t fThetaB; //"B" parameter of theta RMS dependence
73 Float_t fThetaAlpha; //"Alpha" parameter (power) of theta RMS dependence
75 Float_t fPhiA;//"A" parameter of phi RMS dependence
76 Float_t fPhiB;//"B" parameter of phi RMS dependence
77 Float_t fPhiAlpha;//"Alpha" parameter (power) of phi RMS dependence
79 Double_t fR2;//square of radius
80 Double_t fLambda;//Interception parameter
82 Double_t fFittedR;//fitted radius
83 Double_t fFittedLambda;//fitted Interception parameter
85 Float_t fRConvergenceTreshold;
86 Float_t fLambdaConvergenceTreshold;
89 ClassDef(AliHBTCorrectQInvCorrelFctn,1)
93 Double_t AliHBTCorrectQInvCorrelFctn::GetModelValue(Double_t qinv)
95 //factor 0.038936366329 conected with units change GeV<->SI
96 return 1.0 + fLambda*TMath::Exp(-fR2*qinv*qinv/0.038936366329);
99 //____________________
100 ///////////////////////////////////////////////////////
102 // AliHBTCorrectQ3DCorrelFctn //
104 // Class for calculating Q Invariant correlation //
105 // taking to the account resolution of the //
106 // detector and coulomb effects. //
108 ///////////////////////////////////////////////////////
110 class AliHBTCorrectQ3DCorrelFctn: public AliHBTOnePairFctn3D
113 AliHBTCorrectQ3DCorrelFctn(const char* name = "qinvcorrectedCF",
114 const char* title= "Corrected Q_{inv} Correlation Fonction");
115 virtual ~AliHBTCorrectQ3DCorrelFctn();
118 TH3D* fMeasCorrelFctn;
120 TH3D* fSmearedNumer; //! Numerator of smeard q
121 TH3D* fSmearedDenom; //! Denominator of smeard q
122 TH3D* fMeasNumer; //! Numerator of ideal q calculated on basis of model equation
123 TH3D* fMeasDenom; //! Denominator of ideal q calculated on basis of model equation
129 ClassDef(AliHBTCorrectQ3DCorrelFctn,1)