* See cxx source for full Copyright notice */
/* $Id$ */
-
+//
+// Generator for slow nucleons in pA interactions.
+// Source is modelled by a relativistic Maxwell distributions.
+// Original code by Ferenc Sikler <sikler@rmki.kfki.hu>
+// This class: andreas.morsch@cern.ch
+//
#include "AliGenerator.h"
class AliSlowNucleonModel;
class TH2F;
-
+class TH1F;
+class TF1;
class AliGenSlowNucleons : public AliGenerator
{
virtual void SetPmax(Float_t pmax = 10.) {fPmax = pmax;}
virtual void SetNominalCmsEnergy(Float_t energy = 14000.) {fCMS = energy;}
virtual void SetTarget(Float_t a=208, Float_t z=82) {fATarget = a; fZTarget = z;}
+ virtual void SetTarget(TString s, Int_t a, Int_t z) {AliGenerator::SetTarget(s, a, z);}
+ virtual void SetProtonDirection(Float_t dir = 1.);
virtual void SetCharge(Int_t c = 1) {fCharge = c;}
virtual void SetTemperature(Double_t t1 = 0.04, Double_t t2 = 0.004)
{fTemperatureG = t1; fTemperatureB = t2;}
virtual void SetDebug(Int_t flag = 0) {fDebug = flag;}
virtual void SetNumbersOfSlowNucleons(Int_t ngp, Int_t ngn, Int_t nbp, Int_t nbn)
{fNgp = ngp; fNgn = ngn; fNbp = nbp; fNbn = nbn;}
+ //
+ // Added by Chiara to take into account angular distribution 4 gray tracks
+ virtual void SetThetaDist(Int_t flag=0) {fThetaDistribution = flag;}
protected:
- void GenerateSlow(Int_t charge, Double_t T, Double_t beta, Float_t* q);
+ void GenerateSlow(Int_t charge, Double_t T, Double_t beta, Float_t* q, Float_t &theta);
Double_t Maxwell(Double_t m, Double_t p, Double_t t);
void Lorentz(Double_t m, Double_t beta, Float_t* q);
protected:
- Float_t fCMS; // Center of mass energy
- Float_t fMomentum; // Target nucleus momentum
- Float_t fBeta; // Target nucleus beta
- Float_t fPmax; // Maximum slow nucleon momentum
- Float_t fATarget; // Target nucleus mass number
- Float_t fZTarget; // Target nucleus charge number
- Int_t fCharge; // Slow nucleon charge
- Float_t fTemperatureG; // Source Temperature for gray nucleons
- Float_t fBetaSourceG; // Source beta for gray nucleons
- Float_t fTemperatureB; // Source Temperature for black nucleons
- Float_t fBetaSourceB; // Source beta for black nucleons
- Int_t fNgp; // Number of gray protons
- Int_t fNgn; // Number of gray neutrons
- Int_t fNbp; // Number of black protons
- Int_t fNbn; // Number of black neutrons
- Int_t fDebug; // Debug flag
- TH2F* fDebugHist; // Histogram for debugging
+ Float_t fCMS; // Center of mass energy
+ Float_t fMomentum; // Target nucleus momentum
+ Float_t fBeta; // Target nucleus beta
+ Float_t fPmax; // Maximum slow nucleon momentum
+ Float_t fATarget; // Target nucleus mass number
+ Float_t fZTarget; // Target nucleus charge number
+ Int_t fCharge; // Slow nucleon charge
+ Float_t fProtonDirection; // Direction of the proton
+ Float_t fTemperatureG; // Source Temperature for gray nucleons
+ Float_t fBetaSourceG; // Source beta for gray nucleons
+ Float_t fTemperatureB; // Source Temperature for black nucleons
+ Float_t fBetaSourceB; // Source beta for black nucleons
+ Int_t fNgp; // Number of gray protons
+ Int_t fNgn; // Number of gray neutrons
+ Int_t fNbp; // Number of black protons
+ Int_t fNbn; // Number of black neutrons
+ Int_t fDebug; // Debug flag
+ TH2F* fDebugHist1; // Histogram for debugging
+ TH2F* fDebugHist2; // Histogram for debugging
+ // Added by Chiara to take into account angular distribution 4 gray tracks
+ Int_t fThetaDistribution;// 0 -> flat dist., 1 -> fwd. peaked distribution
+ TH1F* fCosThetaGrayHist; // Histogram for debugging
+ TF1* fCosTheta; // Function for non-uniform cos(theta) distribution
//
AliSlowNucleonModel* fSlowNucleonModel; // The slow nucleon model
- ClassDef(AliGenSlowNucleons,1) // Slow Nucleon Generator
+
+ private:
+ AliGenSlowNucleons(const AliGenSlowNucleons &sn);
+ AliGenSlowNucleons & operator=(const AliGenSlowNucleons & rhs);
+
+ ClassDef(AliGenSlowNucleons,2) // Slow Nucleon Generator
};
#endif