Gabriele Cosmo
260 lines
10 KiB
C++
260 lines
10 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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//
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// -----------------------------------------------------------------------------
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// GEANT 4 class implementation file
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// -----------------------------------------------------------------------------
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#ifndef G4VLongitudinalStringDecay_h
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#define G4VLongitudinalStringDecay_h 1
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#include "G4HadronicInteraction.hh"
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#include "G4VStringFragmentation.hh"
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#include "G4DynamicParticle.hh"
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#include "G4KineticTrack.hh"
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#include "G4KineticTrackVector.hh"
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#include "G4HadronBuilder.hh"
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#include <vector>
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//*****************************************************************************
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class G4FragmentingString;
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class G4VLongitudinalStringDecay : public G4HadronicInteraction
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{
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public:
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G4VLongitudinalStringDecay(const G4String& name = "StringDecay");
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virtual ~G4VLongitudinalStringDecay();
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G4HadFinalState *ApplyYourself(const G4HadProjectile&, G4Nucleus&) final;
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private:
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// not implemented to protect/forbid use
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G4VLongitudinalStringDecay(const G4VLongitudinalStringDecay &right);
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const G4VLongitudinalStringDecay & operator=(const G4VLongitudinalStringDecay &right);
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G4bool operator==(const G4VLongitudinalStringDecay &right) const;
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G4bool operator!=(const G4VLongitudinalStringDecay &right) const;
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public:
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virtual G4KineticTrackVector* FragmentString(const G4ExcitedString& theString)=0;
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void AddNewParticles();
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void EraseNewParticles();
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//struct DeleteString { void operator()(G4ExcitedString* aS){delete aS;} };
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// To set minimal mass of a string. The string with mass above the minimal mass can fragment.
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void SetMinMasses();
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void SetMinimalStringMass(const G4FragmentingString * const string);
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void SetMinimalStringMass2(const G4double aValue);
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protected:
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// For changing Mass Cut used for selection of very small mass strings
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virtual void SetMassCut(G4double aValue);
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G4double GetMassCut();
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// For handling a string with very low mass
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G4KineticTrackVector * ProduceOneHadron(const G4ExcitedString * const theString);
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// To store created quarks or 2 last hadrons
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typedef std::pair<G4ParticleDefinition*, G4ParticleDefinition*> pDefPair;
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// For creation of hadrons from given quark pair
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typedef G4ParticleDefinition * (G4HadronBuilder::*Pcreate)
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(G4ParticleDefinition*, G4ParticleDefinition*);
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// Used by ProduceOneHadron method for estimation of lowest possible mass of
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// given quark system -- string.
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G4double PossibleHadronMass(const G4FragmentingString * const string,
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Pcreate build=0, pDefPair * pdefs=0);
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G4ParticleDefinition* FindParticle(G4int Encoding);
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// For decision on continue or stop string fragmentation
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virtual G4bool StopFragmenting(const G4FragmentingString * const string)=0;
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virtual G4bool IsItFragmentable(const G4FragmentingString * const string)=0;
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// If a string can not fragment, make last break into 2 hadrons
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virtual G4bool SplitLast(G4FragmentingString * string,
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G4KineticTrackVector * LeftVector,
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G4KineticTrackVector * RightVector)=0;
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virtual void Sample4Momentum(G4LorentzVector* Mom, G4double Mass,
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G4LorentzVector* AntiMom, G4double AntiMass,
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G4double InitialMass)=0;
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// If a string can fragment, do the following:
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// Make a copy of a string
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G4ExcitedString *CopyExcited(const G4ExcitedString& string);
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// Produce a hadron at Splitup of the string
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virtual G4KineticTrack * Splitup(G4FragmentingString *string,
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G4FragmentingString *&newString)=0;
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// The hadron can be producet at QuarkSplitup or DiQuarkSplitup
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virtual G4ParticleDefinition * QuarkSplitup(G4ParticleDefinition* decay,
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G4ParticleDefinition *&created);
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virtual G4ParticleDefinition * DiQuarkSplitup(G4ParticleDefinition* decay,
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G4ParticleDefinition *&created)=0;
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// All of them are going through quak-antiquark pair creation
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pDefPair CreatePartonPair(G4int NeedParticle, G4bool AllowDiquarks=true);
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public:
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// For a pair it is needed:
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G4int SampleQuarkFlavor(void);
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G4ThreeVector SampleQuarkPt(G4double ptMax=-1.); // -1. no limit on maxpt.
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protected:
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// For determination of kinematical properties of the created hadron
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virtual G4LorentzVector * SplitEandP(G4ParticleDefinition * pHadron,
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G4FragmentingString * string,
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G4FragmentingString * newString )=0;
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virtual G4double GetLightConeZ(G4double zmin, G4double zmax,
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G4int PartonEncoding,
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G4ParticleDefinition* pHadron,
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G4double Px, G4double Py ) = 0;
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void CalculateHadronTimePosition(G4double theInitialStringMass,
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G4KineticTrackVector *);
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// Used for some test purposes
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void ConstructParticle();
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G4ParticleDefinition* CreateHadron(G4int id1, G4int id2,
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G4bool theGivenSpin, G4int theSpin);
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public:
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void SetSigmaTransverseMomentum(G4double aQT);
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void SetStrangenessSuppression(G4double aValue);
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void SetDiquarkSuppression(G4double aValue);
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void SetDiquarkBreakProbability(G4double aValue);
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void SetSpinThreeHalfBarionProbability(G4double aValue);
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void SetScalarMesonMixings( std::vector<G4double> aVector);
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void SetVectorMesonMixings( std::vector<G4double> aVector);
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void SetStringTensionParameter(G4double aValue);
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void SetProbCCbar(G4double aValue);
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void SetProbEta_c(G4double aValue);
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void SetProbBBbar(G4double aValue);
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void SetProbEta_b(G4double aValue);
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protected:
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G4double GetDiquarkSuppress() {return DiquarkSuppress;};
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G4double GetDiquarkBreakProb() {return DiquarkBreakProb;};
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G4double GetStrangeSuppress() {return StrangeSuppress;};
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G4int GetClusterLoopInterrupt() {return ClusterLoopInterrupt;};
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G4double GetProbCCbar(){return ProbCCbar;};
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G4double GetProbEta_c(){return ProbEta_c;};
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G4double GetProbBBbar(){return ProbBBbar;};
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G4double GetProbEta_b(){return ProbEta_b;};
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G4double GetStringTensionParameter() {return Kappa;};
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protected:
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G4double MassCut;
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G4double SigmaQT; // sigma_q_t of quark/hadron transverse momentum distribution parameter
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G4double DiquarkSuppress; // Diquark suppression parameter
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G4double DiquarkBreakProb; // Diquark breaking probability, qq->h+qq'
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G4double StrangeSuppress ;
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G4int StringLoopInterrupt;
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G4int ClusterLoopInterrupt;
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G4HadronBuilder *hadronizer;
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std::vector<G4double> pspin_meson;
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G4double pspin_barion;
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std::vector<G4double> vectorMesonMix;
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std::vector<G4double> scalarMesonMix;
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G4double ProbCCbar; // Probability of C-Cbar pair creation
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G4double ProbEta_c; // Mixing of Eta_c and J/Psi
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G4double ProbBBbar; // Probability of B-Bbar pair creation
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G4double ProbEta_b; // Mixing of Eta_b and Ipsilon_b
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G4double ProbCB; // = ProbCCbar + ProbBBbar
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G4double MaxMass;
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G4bool PastInitPhase;
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G4double Kappa; // String tension parameter
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std::vector<G4ParticleDefinition *> NewParticles;
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public:
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// ------ For estimation of a minimal string mass ---------------
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G4double Mass_of_light_quark;
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G4double Mass_of_s_quark;
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G4double Mass_of_c_quark;
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G4double Mass_of_b_quark;
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G4double Mass_of_string_junction;
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G4double minMassQQbarStr[5][5];
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G4double minMassQDiQStr[5][5][5];
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// ------ An estimated minimal string mass ----------------------
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G4double MinimalStringMass;
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G4double MinimalStringMass2;
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G4int Qcharge[5]; // quark charges
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G4int Meson[5][5][7];
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G4double MesonWeight[5][5][7];
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G4int Baryon[5][5][5][4];
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G4double BaryonWeight[5][5][5][4];
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G4double Prob_QQbar[5];
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G4int DecayQuark;
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G4int NewQuark;
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/*
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G4double FFq2q[5][5][2];
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G4double FFq2qq[5][15][2];
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G4double FFqq2q[15][5][2];
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G4double FFqq2qq[15][5][2];
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*/
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// ------ To improve the code structure
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G4ParticleDefinition * FS_LeftHadron[350], * FS_RightHadron[350];
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G4double FS_Weight[350];
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G4int NumberOf_FS;
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};
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//******************************************************************************
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// Class G4VLongitudinalStringDecay
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#endif
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