G4ElementaryParticleCollider Class Reference

#include <G4ElementaryParticleCollider.hh>

Inheritance diagram for G4ElementaryParticleCollider:

Public Member Functions
	G4ElementaryParticleCollider ()
virtual	~G4ElementaryParticleCollider ()
void	collide (G4InuclParticle *bullet, G4InuclParticle *target, G4CollisionOutput &output)
Public Member Functions inherited from G4CascadeColliderBase
	G4CascadeColliderBase (const char *name, G4int verbose=0)
virtual	~G4CascadeColliderBase ()
virtual void	rescatter (G4InuclParticle *, G4KineticTrackVector *, G4V3DNucleus *, G4CollisionOutput &)
virtual void	setVerboseLevel (G4int verbose=0)
virtual void	setConservationChecks (G4bool doBalance=true)
Public Member Functions inherited from G4VCascadeCollider
	G4VCascadeCollider (const char *name, G4int verbose=0)
virtual	~G4VCascadeCollider ()
virtual void	collide (G4InuclParticle *bullet, G4InuclParticle *target, G4CollisionOutput &output)=0
virtual void	setVerboseLevel (G4int verbose=0)

Additional Inherited Members
Protected Member Functions inherited from G4CascadeColliderBase
virtual G4bool	useEPCollider (G4InuclParticle *bullet, G4InuclParticle *target) const
virtual G4bool	explosion (G4InuclNuclei *target) const
virtual G4bool	explosion (G4Fragment *target) const
virtual G4bool	explosion (G4int A, G4int Z, G4double excitation) const
virtual G4bool	inelasticInteractionPossible (G4InuclParticle *bullet, G4InuclParticle *target, G4double ekin) const
virtual G4bool	validateOutput (G4InuclParticle *bullet, G4InuclParticle *target, G4CollisionOutput &output)
virtual G4bool	validateOutput (G4InuclParticle *bullet, G4InuclParticle *target, const std::vector< G4InuclElementaryParticle > &particles)
virtual G4bool	validateOutput (G4InuclParticle *bullet, G4InuclParticle *target, const std::vector< G4InuclNuclei > &fragments)
Protected Member Functions inherited from G4VCascadeCollider
virtual void	setName (const char *name)
Protected Attributes inherited from G4CascadeColliderBase
G4InteractionCase	interCase
G4bool	doConservationChecks
G4CascadeCheckBalance *	balance
Protected Attributes inherited from G4VCascadeCollider
const char *	theName
G4int	verboseLevel

Detailed Description

Definition at line 60 of file G4ElementaryParticleCollider.hh.

Constructor & Destructor Documentation

G4ElementaryParticleCollider()

G4ElementaryParticleCollider::G4ElementaryParticleCollider

(

)

Definition at line 110 of file G4ElementaryParticleCollider.cc.

  : G4CascadeColliderBase("G4ElementaryParticleCollider") {}

~G4ElementaryParticleCollider()

virtual G4ElementaryParticleCollider::~G4ElementaryParticleCollider ( )

inlinevirtual

Definition at line 63 of file G4ElementaryParticleCollider.hh.

{};

Member Function Documentation

collide()

void G4ElementaryParticleCollider::collide ( G4InuclParticle *  bullet, G4InuclParticle *  target, G4CollisionOutput &  output  )

virtual

Implements G4VCascadeCollider.

Definition at line 115 of file G4ElementaryParticleCollider.cc.

{
  if (verboseLevel > 1)
    G4cout << " >>> G4ElementaryParticleCollider::collide" << G4endl;
 
  if (!useEPCollider(bullet,target)) {      // Sanity check
    G4cerr << " ElementaryParticleCollider -> can collide only particle with particle " 
           << G4endl;
    return;
  }
 
#ifdef G4CASCADE_DEBUG_SAMPLER
  static G4bool doPrintTables = true;   // Once and only once per job
  if (doPrintTables) {
    printFinalStateTables();        // For diagnostic reporting
    doPrintTables = false;
  }
#endif
 
  interCase.set(bullet, target);    // To identify kind of collision
 
  if (verboseLevel > 1) G4cout << *bullet << G4endl << *target << G4endl;
 
  G4InuclElementaryParticle* particle1 =
    dynamic_cast<G4InuclElementaryParticle*>(bullet);
  G4InuclElementaryParticle* particle2 =    
    dynamic_cast<G4InuclElementaryParticle*>(target);
 
  if (!particle1 || !particle2) {   // Redundant with useEPCollider()
    G4cerr << " ElementaryParticleCollider -> can only collide hadrons"
           << G4endl;
    return;
  }
 
  // Check for available interaction, or pion+dibaryon special case
  if (!G4CascadeChannelTables::GetTable(interCase.hadrons()) &&
      !particle1->quasi_deutron() && !particle2->quasi_deutron()) {
    G4cerr << " ElementaryParticleCollider -> cannot collide " 
       << particle1->getDefinition()->GetParticleName() << " with "
           << particle2->getDefinition()->GetParticleName() << G4endl;
    return;
  }
  // Generate nucleon or pion collision with nucleon
  // or pion with quasi-deuteron
 
  if (particle1->nucleon() || particle2->nucleon()) { // ok
    G4LorentzConvertor convertToSCM;
    if(particle2->nucleon()) {
      convertToSCM.setBullet(particle1);
      convertToSCM.setTarget(particle2);
    } else {
      convertToSCM.setBullet(particle2);
      convertToSCM.setTarget(particle1);
    };
 
    convertToSCM.setVerbose(verboseLevel);
 
    convertToSCM.toTheCenterOfMass();
    G4double ekin = convertToSCM.getKinEnergyInTheTRS();
    G4double etot_scm = convertToSCM.getTotalSCMEnergy();
    G4double pscm = convertToSCM.getSCMMomentum();
 
    generateSCMfinalState(ekin, etot_scm, pscm, particle1, particle2,
              &convertToSCM);
 
    if (particles.empty()) {    // No final state possible, pass bullet through
      if (verboseLevel) {
    G4cerr << " ElementaryParticleCollider -> failed to collide " 
           << particle1->getMomModule() << " GeV/c " 
           << particle1->getDefinition()->GetParticleName() << " with "
           << particle2->getDefinition()->GetParticleName() << G4endl;
      }
    } else {             // convert back to Lab
      G4LorentzVector mom;      // Buffer to avoid memory churn
      particleIterator ipart;
      for(ipart = particles.begin(); ipart != particles.end(); ipart++) {   
    mom = convertToSCM.backToTheLab(ipart->getMomentum());
    ipart->setMomentum(mom); 
      };
 
      // Check conservation in multibody final state
      if (verboseLevel && !validateOutput(bullet, target, particles)) {
    G4cout << " incoming particles: \n" << *particle1 << G4endl
           << *particle2 << G4endl
           << " outgoing particles: " << G4endl;
    for(ipart = particles.begin(); ipart != particles.end(); ipart++)
      G4cout << *ipart << G4endl;
 
    G4cout << " <<< Non-conservation in G4ElementaryParticleCollider"
           << G4endl;
      }
 
      std::sort(particles.begin(), particles.end(), G4ParticleLargerEkin());
      output.addOutgoingParticles(particles);
    }
  } else {  // neither particle is nucleon: pion on quasideuteron
    if (particle1->quasi_deutron() || particle2->quasi_deutron()) {
      if (particle1->pion() || particle2->pion() ||
      particle1->isPhoton() || particle2->isPhoton()) {
    G4LorentzConvertor convertToSCM;
    if(particle2->quasi_deutron()) {    // Quasideuteron is target
      convertToSCM.setBullet(particle1);
      convertToSCM.setTarget(particle2);
    } else {
      convertToSCM.setBullet(particle2);
      convertToSCM.setTarget(particle1);
    }; 
    convertToSCM.toTheCenterOfMass(); 
    G4double etot_scm = convertToSCM.getTotalSCMEnergy();
    
    generateSCMpionAbsorption(etot_scm, particle1, particle2);
 
    if (particles.empty()) {    // Failed to generate final state
      if (verboseLevel) {
        G4cerr << " ElementaryParticleCollider -> failed to collide " 
           << particle1->getMomModule() << " GeV/c " 
           << particle1->getDefinition()->GetParticleName() << " with "
           << particle2->getDefinition()->GetParticleName() << G4endl;
      }
    } else {            // convert back to Lab
      G4LorentzVector mom;  // Buffer to avoid memory churn
      particleIterator ipart;
      for(ipart = particles.begin(); ipart != particles.end(); ipart++) {
        mom = convertToSCM.backToTheLab(ipart->getMomentum());
        ipart->setMomentum(mom); 
      };
 
      validateOutput(bullet, target, particles);    // Check conservation
 
      std::sort(particles.begin(), particles.end(), G4ParticleLargerEkin());
      output.addOutgoingParticles(particles);
    };
      } else {
    G4cerr << " ElementaryParticleCollider -> can only collide pions with dibaryons " 
           << G4endl;
      };
    } else {
      G4cerr << " ElementaryParticleCollider -> can only collide something with nucleon or dibaryon " 
         << G4endl;
    };
  };  
}

Referenced by G4InuclCollider::collide(), and G4NucleiModel::generateParticleFate().

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The documentation for this class was generated from the following files:

• G4ElementaryParticleCollider.hh
• G4ElementaryParticleCollider.cc