Gabriele Cosmo
265 lines
11 KiB
C++
265 lines
11 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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// Class Description
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// Final state production code for hadron inelastic scattering above 3 GeV
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// based on the modeling ansatz used in FRITIOF.
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// To be used in your physics list in case you need this physics.
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// In this case you want to register an object of this class with an object
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// of G4TheoFSGenerator.
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// Class Description - End
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#ifndef G4FTFModel_h
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#define G4FTFModel_h 1
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// ------------------------------------------------------------
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// GEANT 4 class header file
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//
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// ---------------- G4FTFModel ----------------
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// by Gunter Folger, May 1998.
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// class implementing the excitation in the FTF Parton String Model
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// ------------------------------------------------------------
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#include "G4VPartonStringModel.hh"
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#include "G4FTFParameters.hh"
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#include "G4FTFParticipants.hh"
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#include "G4ExcitedStringVector.hh"
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#include "G4DiffractiveExcitation.hh"
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#include "G4ElasticHNScattering.hh"
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#include "G4FTFAnnihilation.hh"
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#include "G4Proton.hh"
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#include "G4Neutron.hh"
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class G4VSplitableHadron;
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class G4ExcitedString;
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class G4FTFModel : public G4VPartonStringModel {
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public:
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G4FTFModel( const G4String& modelName = "FTF" );
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~G4FTFModel() override;
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G4V3DNucleus* GetTargetNucleus() const;
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G4V3DNucleus* GetWoundedNucleus() const override;
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G4V3DNucleus* GetProjectileNucleus() const override;
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void ModelDescription( std::ostream& ) const override;
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G4FTFModel( const G4FTFModel& right ) = delete;
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const G4FTFModel& operator=( const G4FTFModel& right ) = delete;
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G4bool operator==( const G4FTFModel& right ) const = delete;
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G4bool operator!=( const G4FTFModel& right ) const = delete;
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void SetImpactParameter( const G4double b_value );
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G4double GetImpactParameter() const;
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void SetBminBmax( const G4double bmin_value, const G4double bmax_value );
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G4bool SampleBinInterval() const;
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G4double GetBmin() const;
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G4double GetBmax() const;
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G4int GetNumberOfProjectileSpectatorNucleons() const;
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G4int GetNumberOfTargetSpectatorNucleons() const;
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G4int GetNumberOfNNcollisions() const;
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protected:
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void Init( const G4Nucleus& aNucleus,
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const G4DynamicParticle& aProjectile ) override;
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G4ExcitedStringVector* GetStrings() override;
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private:
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void StoreInvolvedNucleon();
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void ReggeonCascade();
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G4bool PutOnMassShell();
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G4bool ExciteParticipants();
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void BuildStrings( G4ExcitedStringVector* strings );
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void GetResiduals();
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G4bool AdjustNucleons( G4VSplitableHadron* SelectedAntiBaryon,
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G4Nucleon* ProjectileNucleon,
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G4VSplitableHadron* SelectedTargetNucleon,
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G4Nucleon* TargetNucleon,
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G4bool Annihilation );
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// The "AdjustNucleons" method uses the following struct and 3 new utility methods:
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struct CommonVariables {
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G4int TResidualMassNumber = 0, TResidualCharge = 0, PResidualMassNumber = 0,
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PResidualCharge = 0, PResidualLambdaNumber = 0;
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G4double SqrtS = 0.0, S = 0.0, SumMasses = 0.0,
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TResidualExcitationEnergy = 0.0, TResidualMass = 0.0, TNucleonMass = 0.0,
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PResidualExcitationEnergy = 0.0, PResidualMass = 0.0, PNucleonMass = 0.0,
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Mprojectile = 0.0, M2projectile = 0.0, Pzprojectile = 0.0, Eprojectile = 0.0,
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WplusProjectile = 0.0,
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Mtarget = 0.0, M2target = 0.0, Pztarget = 0.0, Etarget = 0.0, WminusTarget = 0.0,
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Mt2targetNucleon = 0.0, PztargetNucleon = 0.0, EtargetNucleon = 0.0,
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Mt2projectileNucleon = 0.0, PzprojectileNucleon = 0.0, EprojectileNucleon = 0.0,
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YtargetNucleus = 0.0, YprojectileNucleus = 0.0,
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XminusNucleon = 0.0, XplusNucleon = 0.0, XminusResidual = 0.0, XplusResidual = 0.0;
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G4ThreeVector PtNucleon, PtResidual, PtNucleonP, PtResidualP, PtNucleonT, PtResidualT;
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G4LorentzVector Psum, Pprojectile, Ptmp, Ptarget, TResidual4Momentum, PResidual4Momentum;
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G4LorentzRotation toCms, toLab;
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};
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G4int AdjustNucleonsAlgorithm_beforeSampling( G4int interactionCase,
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G4VSplitableHadron* SelectedAntiBaryon,
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G4Nucleon* ProjectileNucleon,
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G4VSplitableHadron* SelectedTargetNucleon,
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G4Nucleon* TargetNucleon,
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G4bool Annihilation,
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CommonVariables& common );
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G4bool AdjustNucleonsAlgorithm_Sampling( G4int interactionCase,
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CommonVariables& common );
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void AdjustNucleonsAlgorithm_afterSampling( G4int interactionCase,
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G4VSplitableHadron* SelectedAntiBaryon,
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G4VSplitableHadron* SelectedTargetNucleon,
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CommonVariables& common );
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G4ThreeVector GaussianPt( G4double AveragePt2, G4double maxPtSquare ) const;
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G4bool ComputeNucleusProperties( G4V3DNucleus* nucleus, G4LorentzVector& nucleusMomentum,
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G4LorentzVector& residualMomentum, G4double& sumMasses,
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G4double& residualExcitationEnergy, G4double& residualMass,
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G4int& residualMassNumber, G4int& residualCharge );
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// Utility method used by PutOnMassShell.
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G4bool GenerateDeltaIsobar( const G4double sqrtS, const G4int numberOfInvolvedNucleons,
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G4Nucleon* involvedNucleons[], G4double& sumMasses );
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// Utility method used by PutOnMassShell.
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G4bool SamplingNucleonKinematics( G4double averagePt2, const G4double maxPt2,
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G4double dCor, G4V3DNucleus* nucleus,
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const G4LorentzVector& pResidual,
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const G4double residualMass, const G4int residualMassNumber,
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const G4int numberOfInvolvedNucleons,
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G4Nucleon* involvedNucleons[], G4double& mass2 );
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// Utility method used by PutOnMassShell.
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G4bool CheckKinematics( const G4double sValue, const G4double sqrtS,
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const G4double projectileMass2, const G4double targetMass2,
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const G4double nucleusY, const G4bool isProjectileNucleus,
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const G4int numberOfInvolvedNucleons, G4Nucleon* involvedNucleons[],
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G4double& targetWminus, G4double& projectileWplus, G4bool& success );
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// Utility method used by PutOnMassShell.
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G4bool FinalizeKinematics( const G4double w, const G4bool isProjectileNucleus,
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const G4LorentzRotation& boostFromCmsToLab,
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const G4double residualMass, const G4int residualMassNumber,
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const G4int numberOfInvolvedNucleons,
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G4Nucleon* involvedNucleons[],
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G4LorentzVector& residual4Momentum );
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// Utility method used by PutOnMassShell.
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G4ReactionProduct theProjectile;
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G4FTFParticipants theParticipants;
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G4Nucleon* TheInvolvedNucleonsOfTarget[250];
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G4int NumberOfInvolvedNucleonsOfTarget;
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G4Nucleon* TheInvolvedNucleonsOfProjectile[250];
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G4int NumberOfInvolvedNucleonsOfProjectile;
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G4FTFParameters* theParameters;
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G4DiffractiveExcitation* theExcitation;
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G4ElasticHNScattering* theElastic;
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G4FTFAnnihilation* theAnnihilation;
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std::vector< G4VSplitableHadron* > theAdditionalString;
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G4double LowEnergyLimit;
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G4bool HighEnergyInter;
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G4LorentzVector ProjectileResidual4Momentum;
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G4int ProjectileResidualMassNumber;
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G4int ProjectileResidualCharge;
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G4int ProjectileResidualLambdaNumber; // Number of (anti-)lambdas for projectile (anti-)hypernucleus
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G4double ProjectileResidualExcitationEnergy;
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G4LorentzVector TargetResidual4Momentum;
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G4int TargetResidualMassNumber;
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G4int TargetResidualCharge;
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G4double TargetResidualExcitationEnergy;
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G4double Bimpact;
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G4bool BinInterval;
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G4double Bmin;
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G4double Bmax;
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G4int NumberOfProjectileSpectatorNucleons;
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G4int NumberOfTargetSpectatorNucleons;
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G4int NumberOfNNcollisions;
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};
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inline G4V3DNucleus* G4FTFModel::GetWoundedNucleus() const {
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return theParticipants.GetWoundedNucleus();
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}
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inline G4V3DNucleus* G4FTFModel::GetTargetNucleus() const {
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return theParticipants.GetWoundedNucleus();
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}
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inline G4V3DNucleus* G4FTFModel::GetProjectileNucleus() const {
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return theParticipants.GetProjectileNucleus();
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}
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inline void G4FTFModel::SetImpactParameter( const G4double b_value ) {
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Bimpact = b_value;
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}
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inline G4double G4FTFModel::GetImpactParameter() const {
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return Bimpact;
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}
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inline void G4FTFModel::SetBminBmax( const G4double bmin_value, const G4double bmax_value ) {
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BinInterval = false;
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if ( bmin_value < 0.0 || bmax_value < 0.0 || bmax_value < bmin_value ) return;
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BinInterval = true;
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Bmin = bmin_value;
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Bmax = bmax_value;
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}
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inline G4bool G4FTFModel::SampleBinInterval() const {
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return BinInterval;
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}
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inline G4double G4FTFModel::GetBmin() const {
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return Bmin;
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}
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inline G4double G4FTFModel::GetBmax() const {
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return Bmax;
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}
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inline G4int G4FTFModel::GetNumberOfProjectileSpectatorNucleons() const {
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return NumberOfProjectileSpectatorNucleons;
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}
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inline G4int G4FTFModel::GetNumberOfTargetSpectatorNucleons() const {
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return NumberOfTargetSpectatorNucleons;
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}
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inline G4int G4FTFModel::GetNumberOfNNcollisions() const {
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return NumberOfNNcollisions;
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}
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#endif
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