3 // This class introduces the weight's calculation
4 // according to the Lednicky's algorithm.
5 // The detailed description of the algorithm can be found
6 // in comments to fortran code:
9 #ifndef ALIHBTLLWEIGHTS_H
10 #define ALIHBTLLWEIGHTS_H
12 #include "AliHBTWeights.h"
15 class AliHBTLLWeights: public AliHBTWeights
18 virtual ~AliHBTLLWeights(){;}
19 static AliHBTLLWeights* Instance();
22 Double_t GetWeight(const AliHBTPair* partpair); //get weight calculated by Lednicky's algorithm
24 void Init(); //put the initial values in fortran commons fsiini, led_bldata
25 void SetTest(Bool_t rtest = kTRUE);//Sets fTest member
27 void SetColoumb(Bool_t col = kTRUE);//: (ICH in fortran code) Coulomb interaction between the two particles ON (OFF)
28 void SetQuantumStatistics(Bool_t qss = kTRUE);//IQS: quantum statistics for the two particles ON (OFF) //if non-identical particles automatically off
29 void SetStrongInterSwitch(Bool_t sis = kTRUE);//ISI: strong interaction between the two particles ON (OFF)
30 void SetColWithResidNuclSwitch(Bool_t crn = kTRUE);//I3C: Coulomb interaction with residual nucleus ON (OFF)
31 void SetLambda(Double_t la){fOneMinusLambda=1.-la;} //lambda=haoticity
32 void SetApproxModel(Int_t ap);//sets Model of Approximation (NS in Fortran code)
33 void SetRandomPosition(Bool_t rp = kTRUE); //ON=kTRUE(OFF=kFALSE)
34 void SetR1dw(Double_t R); //spherical source model radii
35 void SetParticlesTypes(Int_t pid1, Int_t pid2); //set AliRoot particles types
36 void SetNucleusCharge(Double_t ch); // not used now (see comments in fortran code)
37 void SetNucleusMass(Double_t mass); // (see comments in fortran code)
41 Bool_t fTest; //flag indicating if parameters listed below are to be calculated automatically (0)
43 Bool_t fColoumbSwitch;
44 Bool_t fQuantStatSwitch;
45 Bool_t fStrongInterSwitch;//Switches strong interactions TRUE=ON
46 Bool_t fColWithResidNuclSwitch;//Switches couloumb interaction
47 //with residual nucleus TRUE=ON
48 Double_t fNuclMass; //mass of nucleus
49 Double_t fNuclCharge; //charge of nucleus
51 Bool_t fRandomPosition;//flag indicating if positions of particles shuold be randomized according to parameters below
52 Double_t fRadius; //radius used for randomizing particle vertex position
54 Double_t fOneMinusLambda; //1 - intercept parameter
56 Int_t fApproximationModel; //approximation used to calculate Bethe-Salpeter amplitude see SetApproxModel for more comments
60 Double_t fSigma; //constants for spherical source model in cm
61 static const Double_t fgkWcons; //constant for fm->GeV conversion 1/0.1973
63 static AliHBTLLWeights *fgLLWeights;// pointer to wrapper of Fortran Lednicky code
65 static Int_t GetPairCode(Int_t pid1,Int_t pid2);
66 static Int_t GetPairCode(const AliHBTPair* partpair);//calculate automatically internal code
70 AliHBTLLWeights(const AliHBTLLWeights &/*source*/);
71 AliHBTLLWeights & operator=(const AliHBTLLWeights& /*source*/);
73 ClassDef(AliHBTLLWeights,1)