KaonPhysics.cc

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// $Id: $
//                                                                            //
//  File:        KaonPhysics.cc                                               //
//  Description: Kaon hadronic physics constructor for EICPhysicsList         //
//                                                                            //
//  Author:      Dennis H. Wright (SLAC)                                      //  
//  Date:        3 July 2018                                                  //
//                                                                            //


#include "KaonPhysics.hh"

#include <Geant4/G4ProcessManager.hh>
#include <Geant4/G4KaonPlusInelasticProcess.hh>
#include <Geant4/G4KaonMinusInelasticProcess.hh>
#include <Geant4/G4KaonZeroLInelasticProcess.hh>
#include <Geant4/G4KaonZeroSInelasticProcess.hh>
#include <Geant4/G4HadronElasticProcess.hh>
#include <Geant4/G4HadronicAbsorptionBertini.hh>

#include <Geant4/G4CascadeInterface.hh>
#include <Geant4/G4TheoFSGenerator.hh>
#include <Geant4/G4FTFModel.hh>
#include <Geant4/G4ExcitedStringDecay.hh>
#include <Geant4/G4LundStringFragmentation.hh>
#include <Geant4/G4GeneratorPrecompoundInterface.hh>
#include <Geant4/G4HadronElastic.hh>

#include <Geant4/G4ChipsKaonPlusInelasticXS.hh>
#include <Geant4/G4ChipsKaonMinusInelasticXS.hh>
#include <Geant4/G4ChipsKaonZeroInelasticXS.hh>
#include <Geant4/G4CrossSectionPairGG.hh>
#include <Geant4/G4CrossSectionElastic.hh>
#include <Geant4/G4ComponentGGHadronNucleusXsc.hh>
#include <Geant4/G4SystemOfUnits.hh>


KaonPhysics::KaonPhysics():
  ftfp(nullptr),
  stringModel(nullptr),
  stringDecay(nullptr),
  fragModel(nullptr),
  preCompoundModel(nullptr)
{}


KaonPhysics::~KaonPhysics()
{
  delete stringDecay;
  delete stringModel;
  delete fragModel;
  delete preCompoundModel;
}


void KaonPhysics::ConstructParticle()
{}


void KaonPhysics::ConstructProcess()
{
  G4ProcessManager* procMan;

  // One elastic model for all kaon energies
  G4HadronElastic* elModel = new G4HadronElastic();

  // Use Bertini cascade for low energies
  G4CascadeInterface* loInelModel = new G4CascadeInterface;
  loInelModel->SetMinEnergy(0.0);
  loInelModel->SetMaxEnergy(12.0*GeV);

  // Use FTFP for high energies   ==>>   eventually replace this with new class FTFPInterface
  ftfp = new G4TheoFSGenerator("FTFP");
  stringModel = new G4FTFModel;
  stringDecay =
    new G4ExcitedStringDecay(fragModel = new G4LundStringFragmentation);
  stringModel->SetFragmentationModel(stringDecay);
  preCompoundModel = new G4GeneratorPrecompoundInterface();

  ftfp->SetHighEnergyGenerator(stringModel);
  ftfp->SetTransport(preCompoundModel); 
  ftfp->SetMinEnergy(10*GeV);
  ftfp->SetMaxEnergy(100*TeV);

  // Inelastic cross section sets
  G4VCrossSectionDataSet* kpCS =
    new G4CrossSectionPairGG(new G4ChipsKaonPlusInelasticXS, 91*GeV);
  G4VCrossSectionDataSet* kmCS =
    new G4CrossSectionPairGG(new G4ChipsKaonMinusInelasticXS, 91*GeV);
  G4VCrossSectionDataSet* kzCS =
    new G4CrossSectionPairGG(new G4ChipsKaonZeroInelasticXS, 91*GeV);

  // Elastic cross section
  G4VCrossSectionDataSet* kelCS =
    new G4CrossSectionElastic(new G4ComponentGGHadronNucleusXsc);

  //   K+                                                                     // 

  procMan = G4KaonPlus::KaonPlus()->GetProcessManager();

  // elastic
  G4HadronElasticProcess* kpProcEl = new G4HadronElasticProcess;
  kpProcEl->RegisterMe(elModel);
  kpProcEl->AddDataSet(kelCS);
  procMan->AddDiscreteProcess(kpProcEl);

  // inelastic 
  G4KaonPlusInelasticProcess* kpProcInel = new G4KaonPlusInelasticProcess;
  kpProcInel->RegisterMe(loInelModel);
  kpProcInel->RegisterMe(ftfp);
  kpProcInel->AddDataSet(kpCS);
  procMan->AddDiscreteProcess(kpProcInel);

  //   K-                                                                     // 

  procMan = G4KaonMinus::KaonMinus()->GetProcessManager();

  // elastic
  G4HadronElasticProcess* kmProcEl = new G4HadronElasticProcess;
  kmProcEl->RegisterMe(elModel);
  kmProcEl->AddDataSet(kelCS);
  procMan->AddDiscreteProcess(kmProcEl);

  // inelastic
  G4KaonMinusInelasticProcess* kmProcInel = new G4KaonMinusInelasticProcess;
  kmProcInel->RegisterMe(loInelModel);
  kmProcInel->RegisterMe(ftfp);
  kmProcInel->AddDataSet(kmCS);
  procMan->AddDiscreteProcess(kmProcInel);

  // stopping
  G4HadronicAbsorptionBertini* bertAbsorb = new G4HadronicAbsorptionBertini;
  procMan->AddRestProcess(bertAbsorb);

  //   K0L                                                                    // 

  procMan = G4KaonZeroLong::KaonZeroLong()->GetProcessManager();

  // elastic
  G4HadronElasticProcess* k0LProcEl = new G4HadronElasticProcess;
  k0LProcEl->RegisterMe(elModel);
  k0LProcEl->AddDataSet(kelCS);
  procMan->AddDiscreteProcess(k0LProcEl);

  // inelastic
  G4KaonZeroLInelasticProcess* k0LProcInel = new G4KaonZeroLInelasticProcess;
  k0LProcInel->RegisterMe(loInelModel);
  k0LProcInel->RegisterMe(ftfp);
  k0LProcInel->AddDataSet(kzCS);
  procMan->AddDiscreteProcess(k0LProcInel);

  //   K0S                                                                    // 

  procMan = G4KaonZeroShort::KaonZeroShort()->GetProcessManager();

  // elastic
  G4HadronElasticProcess* k0SProcEl = new G4HadronElasticProcess;
  k0SProcEl->RegisterMe(elModel);
  k0SProcEl->AddDataSet(kelCS);
  procMan->AddDiscreteProcess(k0SProcEl);

  // inelastic
  G4KaonZeroSInelasticProcess* k0SProcInel = new G4KaonZeroSInelasticProcess;
  k0SProcInel->RegisterMe(loInelModel);
  k0SProcInel->RegisterMe(ftfp);
  k0SProcInel->AddDataSet(kzCS);
  procMan->AddDiscreteProcess(k0SProcInel);
}