Gabriele Cosmo
199 lines
8.0 KiB
C++
199 lines
8.0 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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// $Id: G4VLongitudinalStringDecay.hh 106967 2017-10-31 08:41:49Z gcosmo $
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// Maxim Komogorov
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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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// History: first implementation, Maxim Komogorov, 1-Jul-1998
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// -----------------------------------------------------------------------------
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#ifndef G4VLongitudinalStringDecay_h
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#define G4VLongitudinalStringDecay_h 1
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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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class G4FragmentingString;
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class G4VLongitudinalStringDecay
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{
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public:
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G4VLongitudinalStringDecay();
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virtual ~G4VLongitudinalStringDecay();
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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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int operator==(const G4VLongitudinalStringDecay &right) const;
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int 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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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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// For handling a string with very low mass
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G4KineticTrackVector * LightFragmentationTest(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 LightFragmentationTest for estimation of lowest possible mass of
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// given quark system
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G4double FragmentationMass(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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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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// 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 IsFragmentable(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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// If a string fragments, do the following
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// For transver of a string to its CMS frame
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G4ExcitedString *CPExcited(const G4ExcitedString& string);
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G4KineticTrack * Splitup(G4FragmentingString *string,
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G4FragmentingString *&newString);
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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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pDefPair CreatePartonPair(G4int NeedParticle, G4bool AllowDiquarks=true);
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public:
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// used by G4VKinkyStringDecy.
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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 created hadron
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// virtual G4LorentzVector * SplitEandP(G4ParticleDefinition * pHadron,
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// G4FragmentingString * string )=0;
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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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G4KineticTrackVector* DecayResonans (G4KineticTrackVector* aHadrons);
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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 SetVectorMesonProbability(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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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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G4double GetClusterMass() {return ClusterMass;};
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G4int GetClusterLoopInterrupt() {return ClusterLoopInterrupt;};
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G4double GetStringTensionParameter() {return Kappa;};
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protected:
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G4double MassCut;
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G4double ClusterMass;
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G4double SigmaQT; // sigma_q_t is quark transverse momentum distribution parameter
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G4double DiquarkSuppress; // is Diquark suppression parameter
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G4double DiquarkBreakProb; // is Diquark breaking probability
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G4double SmoothParam; // model parameter
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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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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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G4bool PastInitPhase;
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G4double Kappa; // String tension parameter
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//G4double MinFragmentationMass(G4ExcitedString * theString,
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// G4ParticleDefinition*& Hadron1,
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// G4ParticleDefinition*& Hadron2);
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};
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// Class G4VLongitudinalStringDecay
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#endif
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