-//This class introduce the weights calculation according with Lednicky's algorithm.
-//The detailed description of the algorithm can be found in comments to fortran code:
-//fsiw.f, fsiini.f
+/* $Id$ */
+
+//_________________________________________________________________
+///////////////////////////////////////////////////////////////////////
+//
+// class AliHBTLLWeights
+//
+// This class introduces the weight's calculation
+// according to the Lednicky's algorithm.
+// The detailed description of the algorithm can be found
+// in comments to fortran code:
+// fsiw.f, fsiini.f
+//
+// Source simulation: Particle position/distance randomization
+// This class has functionality of randomizing particle positions / pair distances
+// so obtained correlation function follows a given shape,
+// depending on a value of fRandomPosition member
+// By default this feature is switched off: fRandomPosition == AliHBTLLWeights::kNone
+// It can be: kGaussianQInv - so 1D Qinv correlation function has a Gaussian shape
+// (and also Qlong and Qside, but not Qout)
+// kGaussianOSL - so 3D Qout-Qside-Qlong correlation function has a Gaussian shape
+//
+// Ludmila Malinina, Piotr Krzysztof Skowronski
+//
+///////////////////////////////////////////////////////////////////////
+
#ifndef ALIHBTLLWEIGHTS_H
#define ALIHBTLLWEIGHTS_H
-#include <TObject.h>
-#include "WLedCOMMONS.h"
+#include "AliHBTWeights.h"
class AliHBTPair;
-class AliHBTLLWeights: public TObject
+class AliVAODParticle;
+class AliHBTLLWeights: public AliHBTWeights
{
public:
+ AliHBTLLWeights();
virtual ~AliHBTLLWeights(){;}
static AliHBTLLWeights* Instance();
- void Init(); //put the initial values in fortran commons fsiini, led_bldata
- Double_t GetWeight(const AliHBTPair* partpair); //get weight calculated by Lednicky's algorithm
-
- void SetTest(Bool_t rtest = kTRUE){ftest = rtest;} //if ftest=0:
- //physical values of the following parameters are put automatically
- // in FSIINI (their values are not required)
- // ftest=1: any values of the following parameters are allowed,
- //the following parameters are required:
-
- void SetColoumb(Bool_t col = kTRUE){fColoumbSwitch = col;}//: (ICH in fortran code) Coulomb interaction between the two particles ON (OFF)
- void SetQuantumStatistics(Bool_t qss = kTRUE){fQuantStatSwitch = qss;}//IQS: quantum statistics for the two particles ON (OFF) //if non-identical particles automatically off
- void SetStrongInterSwitch(Bool_t sis = kTRUE){fStrongInterSwitch = sis;}//ISI: strong interaction between the two particles ON (OFF)
- void SetColWithResidNuclSwitch(Bool_t crn = kTRUE){fColWithResidNuclSwitch = crn;}//I3C: Coulomb interaction with residual nucleus ON (OFF)
- void SetApproxModel(Int_t ap){approximationModel=ap;}//NS in Fortran code,
- // NS=1 Square well potential,
- // NS=3 not used
- // NS=4 scattered wave approximated by the spherical wave,
- // NS=2 same as NS=4 but the approx. of equal emission times in PRF
- // not required (t=0 approx. used in all other cases).
-
+ void Set();
- void SetRandomPosition(Bool_t rp = kTRUE){fRandomPosition = rp;} //ON=kTRUE(OFF=kFALSE)
- // ON -- calculation of the Gauss source radii if the generator don't allows the source generation (for example MeVSim)
- //if ON the following parameters are requested:
- void SetR1dw(Double_t R){fRadius=R;} //spherical source model radii
- void SetLambdaw(Double_t la){flambda=la;} //lambda=haoticity
+ Double_t GetWeight(AliHBTPair* partpair); //get weight calculated by Lednicky's algorithm
+ void Init(); //put the initial values in fortran commons fsiini, led_bldata
+ void SetTest(Bool_t rtest = kTRUE);//Sets fTest member
+
+ void SetColoumb(Bool_t col = kTRUE);//: (ICH in fortran code) Coulomb interaction between the two particles ON (OFF)
+ void SetQuantumStatistics(Bool_t qss = kTRUE);//IQS: quantum statistics for the two particles ON (OFF) //if non-identical particles automatically off
+ void SetStrongInterSwitch(Bool_t sis = kTRUE);//ISI: strong interaction between the two particles ON (OFF)
+ void SetColWithResidNuclSwitch(Bool_t crn = kTRUE);//I3C: Coulomb interaction with residual nucleus ON (OFF)
+ void SetLambda(Double_t la){fOneMinusLambda=1.-la;} //lambda=haoticity
+ void SetApproxModel(Int_t ap);//sets Model of Approximation (NS in Fortran code)
+ void SetParticlesTypes(Int_t pid1, Int_t pid2); //set AliRoot particles types
+ void SetNucleusCharge(Double_t ch); // not used now (see comments in fortran code)
+ void SetNucleusMass(Double_t mass); // (see comments in fortran code)
- void SetParticlesTypes(Int_t pid1, Int_t pid2){fPID1 = pid1; fPID2 = pid2;} //set AliRoot particles types
-
- void SetNucleusCharge(Double_t ch){fNuclCharge=ch;} // not used now (see comments in fortran code)
- void SetNucleusMass(Double_t mass){fNuclMass=mass;} // (see comments in fortran code)
-
+ enum ERandomizationWay {kNone = 0, kGaussianQInv, kGaussianOSL};
+ void SetRandomPosition(ERandomizationWay rw = kNone); //Choose if, and if yes, how to randomize distance between particles
+ void SetR1dw(Double_t R); //spherical source model radii
+
protected:
- Bool_t ftest;
- Bool_t fColoumbSwitch;
- Bool_t fQuantStatSwitch;
+ Bool_t fTest; //flag indicating if parameters listed below are to be calculated automatically (0)
+ //or
+ Bool_t fColoumbSwitch; //switches on/off Coulumb effect
+ Bool_t fQuantStatSwitch; //switches on/off Quantum Statistics effect
Bool_t fStrongInterSwitch;//Switches strong interactions TRUE=ON
Bool_t fColWithResidNuclSwitch;//Switches couloumb interaction
//with residual nucleus TRUE=ON
- Double_t fNuclMass; //mass
- Double_t fNuclCharge; //charge
+ Double_t fNuclMass; //mass of nucleus
+ Double_t fNuclCharge; //charge of nucleus
- Bool_t fRandomPosition;
- Double_t fRadius;
- Double_t flambda;
-
+ ERandomizationWay fRandomPosition;//flag indicating if positions of particles shuold be randomized according to parameters below
+ Double_t fRadius; //radius used for randomizing particle vertex position
- Double_t wein;
-
- Int_t approximationModel; //approximation used to calculate Bethe-Salpeter amplitude
- // ==1 Square well potential,
- // ==3 not used
- // ==4 scattered wave approximated by the spherical wave,
- // ==2 same as NS=4 but the approx. of equal emission times in PRF
- // not required (t=0 approx. used in all other cases).
- // Note: if ==2,4, the B-S amplitude diverges at zero distance r* in
- // the two-particle c.m.s.; user can specify a cutoff AA in
- // SUBROUTINE FSIINI, for example:
- // IF(NS.EQ.2.OR.NS.EQ.4)AA=5.D0 !! in 1/GeV --> AA=1. fm
+ Double_t fOneMinusLambda; //1 - intercept parameter
- Int_t fPID1;
- Int_t fPID2;
+ Int_t fApproximationModel; //approximation used to calculate Bethe-Salpeter amplitude see SetApproxModel for more comments
- static AliHBTLLWeights *fgLLWeights;// pointer to wrapper of Fortran Lednicky code
+ Int_t fPID1; //Pdg Code of the first particle in the pair
+ Int_t fPID2; //Pdg Code of the second particle in the pair
+ Double_t fSigma; //constants for spherical source model in cm
+ static const Double_t fgkWcons; //constant for fm->GeV conversion 1/0.1973
+ static AliHBTLLWeights *fgLLWeights;// pointer to wrapper of Fortran Lednicky code
static Int_t GetPairCode(Int_t pid1,Int_t pid2);
- static Int_t GetPairCode(const AliHBTPair* partpair);//calculate automatically internal FSIW
- // C----------------------------------------------------------------------
- // C- LL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
- // C- part. 1: n p n alfa pi+ pi0 pi+ n p pi+ pi+ pi+ pi- K+ K+ K+ K-
- // C- part. 2: n p p alfa pi- pi0 pi+ d d K- K+ p p K- K+ p p
- // C NS=1 y/n: + + + + + - - - - - - - - - - - -
- // C----------------------------------------------------------------------
- // C- LL 18 19 20 21 22 23 24 25 26 27 28
- // C- part. 1: d d t t K0 K0 d p p p n
- // C- part. 2: d alfa t alfa K0 K0b t t alfa lambda lambda
- // C NS=1 y/n: - - - - - - - - - + +
- // C----------------------------------------------------------------------
-
+ static Int_t GetPairCode(const AliHBTPair* partpair);//calculate automatically internal code
- Double_t fsigma; //constants for spherical source model
- Double_t fwcons; //
-
private:
- AliHBTLLWeights();
-
- public:
- ClassDef(AliHBTLLWeights,1)
+ AliHBTLLWeights(const AliHBTLLWeights &/*source*/);
+ AliHBTLLWeights & operator=(const AliHBTLLWeights& /*source*/);
+
+ Int_t SetMomentaInLCMS(AliVAODParticle* part1, AliVAODParticle* part2);
+ void RandomPairDistances();
+
+
+ void Rotate(Double_t x, Double_t y, Double_t sphi, Double_t cphi, Double_t& xr, Double_t& yr);
+ void Boost (Double_t z, Double_t t, Double_t beta, Double_t gamma, Double_t& zt, Double_t& yt);
+ ClassDef(AliHBTLLWeights,2)
};
#endif
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff