G4LundStringFragmentation.hh

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// $Id: G4LundStringFragmentation.hh 100828 2016-11-02 15:25:59Z gcosmo $
//
// -----------------------------------------------------------------------------
//      GEANT 4 class implementation file
//
//      History: first implementation, Maxim Komogorov, 10-Jul-1998
// -----------------------------------------------------------------------------

#ifndef G4LundStringFragmentation_h
#define G4LundStringFragmentation_h 1

#include "G4VLongitudinalStringDecay.hh"

//**************************************************************************************************************

class G4LundStringFragmentation: public G4VLongitudinalStringDecay
{
  public:

    G4LundStringFragmentation();
    virtual ~G4LundStringFragmentation();

    virtual G4KineticTrackVector* FragmentString(const G4ExcitedString& theString);

  private:
    // not implemented to protect/forbid use
    G4LundStringFragmentation(const G4LundStringFragmentation &right);
    const G4LundStringFragmentation & operator=(const G4LundStringFragmentation &right);
    int operator==(const G4LundStringFragmentation &right) const;
    int operator!=(const G4LundStringFragmentation &right) const;

  private:
    void SetMinimalStringMass(const G4FragmentingString  * const string);           
    void SetMinimalStringMass2(const G4double aValue);  

    virtual G4bool StopFragmenting(const G4FragmentingString  * const string);
    virtual G4bool IsFragmentable(const G4FragmentingString * const string);

    virtual G4bool SplitLast(G4FragmentingString * string, 
                     G4KineticTrackVector * LeftVector,
                     G4KineticTrackVector * RightVector);

    virtual void Sample4Momentum(G4LorentzVector* Mom,     G4double Mass, 
                                 G4LorentzVector* AntiMom, G4double AntiMass, 
                                 G4double InitialMass); 

    virtual G4LorentzVector * SplitEandP(G4ParticleDefinition * pHadron, 
                                         G4FragmentingString * string,
                                         G4FragmentingString * newString);

    virtual G4double GetLightConeZ(G4double zmin, G4double zmax, 
                                   G4int PartonEncoding,  
                                   G4ParticleDefinition* pHadron,
                                   G4double Px, G4double Py);      

    G4double lambda(G4double s, G4double m1_Sqr, G4double m2_Sqr);

    virtual G4ParticleDefinition * DiQuarkSplitup(G4ParticleDefinition* decay,
                                                  G4ParticleDefinition *&created);

  private:
    // Internal methods introduced to improve the code structure (AR Nov 2011)

    G4bool Loop_toFragmentString(G4ExcitedString * & theStringInCMS, 
                                 G4KineticTrackVector * & LeftVector, 
                                 G4KineticTrackVector * & RightVector);

    G4bool Diquark_AntiDiquark_belowThreshold_lastSplitting(G4FragmentingString * & string,
                                                            G4ParticleDefinition * & LeftHadron,
                                                            G4ParticleDefinition * & RightHadron);

    G4bool Diquark_AntiDiquark_aboveThreshold_lastSplitting(G4FragmentingString * & string,
                                                            G4ParticleDefinition * & LeftHadron,
                                                            G4ParticleDefinition * & RightHadron);

    G4bool Quark_AntiQuark_lastSplitting(G4FragmentingString * & string,
                                         G4ParticleDefinition * & LeftHadron,
                                         G4ParticleDefinition * & RightHadron);

    G4bool Quark_Diquark_lastSplitting(G4FragmentingString * & string,
                                       G4ParticleDefinition * & LeftHadron,
                                       G4ParticleDefinition * & RightHadron );

    G4int SampleState(void); 

  private:
    // ------ For estimation of a minimal string mass ---------------
    G4double Mass_of_light_quark;
    G4double Mass_of_heavy_quark;
    G4double Mass_of_string_junction;
    // ------ An estimated minimal string mass ----------------------
    G4double MinimalStringMass;
    G4double MinimalStringMass2;
    // ------ Minimal invariant mass used at a string fragmentation -
    G4double WminLUND;          

    G4int          Meson[3][3][6];
    G4double MesonWeight[3][3][6];

    G4int          Baryon[3][3][3][4];
    G4double BaryonWeight[3][3][3][4];

    G4double Prob_QQbar[3];

    // ------ To improve the code structure
    G4ParticleDefinition * FS_LeftHadron[35], * FS_RightHadron[35];
    G4double FS_Weight[35];
    G4int NumberOf_FS;
};

//**************************************************************************************************************
// Class G4LundStringFragmentation 

#endif