G4INCL::NDeltaToDeltaLKChannel Class Reference

#include <G4INCLNDeltaToDeltaLKChannel.hh>

Inheritance diagram for G4INCL::NDeltaToDeltaLKChannel:

Public Member Functions
void	fillFinalState (FinalState *fs)
FinalState *	getFinalState ()
	NDeltaToDeltaLKChannel (Particle *, Particle *)
virtual	~NDeltaToDeltaLKChannel ()

Private Member Functions
	INCL_DECLARE_ALLOCATION_POOL (NDeltaToDeltaLKChannel)
G4double	sampleDeltaMass (G4double ecm)

Private Attributes
Particle *	particle1
Particle *	particle2

Static Private Attributes
static const G4double	angularSlope = 2.

Detailed Description

Definition at line 47 of file G4INCLNDeltaToDeltaLKChannel.hh.

Constructor & Destructor Documentation

NDeltaToDeltaLKChannel()

G4INCL::NDeltaToDeltaLKChannel::NDeltaToDeltaLKChannel	(	Particle *	p1,
		Particle *	p2
	)

Definition at line 51 of file G4INCLNDeltaToDeltaLKChannel.cc.

        : particle1(p1), particle2(p2)
        {}

~NDeltaToDeltaLKChannel()

G4INCL::NDeltaToDeltaLKChannel::~NDeltaToDeltaLKChannel ( )

virtual

Definition at line 55 of file G4INCLNDeltaToDeltaLKChannel.cc.

{}

Member Function Documentation

fillFinalState()

void G4INCL::NDeltaToDeltaLKChannel::fillFinalState ( FinalState *  fs )

virtual

Implements G4INCL::IChannel.

Definition at line 96 of file G4INCLNDeltaToDeltaLKChannel.cc.

                                                              {
        // D++ p -> L K+ D++ (4)
        //
        // D++ n -> L K+ D+  (3)
        // D++ n -> L K0 D++ (4)
        //
        // D+  p -> L K0 D++ (3)
        // D+  p -> L K+ D+  (2)
        //
        // D+  n -> L K+ D0  (4)
        // D+  n -> L K0 D+  (2)
        
        Particle *delta;
        Particle *nucleon;
        
        if (particle1->isResonance()) {
            delta = particle1;
            nucleon = particle2;
        }
        else {
            delta = particle2;
            nucleon = particle1;
        }
        
        
        const G4double sqrtS = KinematicsUtils::totalEnergyInCM(particle1, particle2);
        
        const G4int iso = ParticleTable::getIsospin(particle1->getType()) + ParticleTable::getIsospin(particle2->getType());
        const G4int iso_d = ParticleTable::getIsospin(delta->getType());
        const G4double rdm = Random::shoot();
        
/*      const G4double m1 = particle1->getMass();
        const G4double m2 = particle2->getMass();
        const G4double pLab = KinematicsUtils::momentumInLab(particle1, particle2);*/
        
        ParticleType KaonType;
        ParticleType DeltaType;
        nucleon->setType(Lambda);
        
        if(std::abs(iso) == 4){// D++ p
            KaonType = ParticleTable::getKaonType(iso/4);
            DeltaType = ParticleTable::getDeltaType(3*iso/4);
        }
        else if(iso == 0){// D+  n
            if(rdm*3 < 2){
                KaonType = ParticleTable::getKaonType(iso_d);
                DeltaType = ParticleTable::getDeltaType(-iso_d);
            }
            else{
                KaonType = ParticleTable::getKaonType(-iso_d);
                DeltaType = ParticleTable::getDeltaType(iso_d);
            }
        }
        else if(ParticleTable::getIsospin(particle1->getType()) == ParticleTable::getIsospin(particle2->getType())){// D+  p
            if(rdm*5 < 3){
                KaonType = ParticleTable::getKaonType(-iso/2);
                DeltaType = ParticleTable::getDeltaType(3*iso/2);
            }
            else{
                KaonType = ParticleTable::getKaonType(iso/2);
                DeltaType = ParticleTable::getDeltaType(iso/2);
            }
        }
        else{// D++ n 
            if(rdm*7 < 3){
                KaonType = ParticleTable::getKaonType(iso/2);
                DeltaType = ParticleTable::getDeltaType(iso/2);
            }
            else{
                KaonType = ParticleTable::getKaonType(-iso/2);
                DeltaType = ParticleTable::getDeltaType(3*iso/2);
            }
        }
        
        delta->setType(DeltaType);
        delta->setMass(sampleDeltaMass(sqrtS));
        
        ParticleList list;
        list.push_back(delta);
        list.push_back(nucleon);
        const ThreeVector &rcol = nucleon->getPosition();
        const ThreeVector zero;
        Particle *kaon = new Particle(KaonType,zero,rcol);
        list.push_back(kaon);
        
        if(Random::shoot()<0.5) PhaseSpaceGenerator::generateBiased(sqrtS, list, 0, angularSlope);
        else PhaseSpaceGenerator::generateBiased(sqrtS, list, 1, angularSlope);
        
        
        fs->addModifiedParticle(delta);
        fs->addModifiedParticle(nucleon);
        fs->addCreatedParticle(kaon);
        
    }

References G4INCL::FinalState::addCreatedParticle(), G4INCL::FinalState::addModifiedParticle(), angularSlope, G4INCL::PhaseSpaceGenerator::generateBiased(), G4INCL::ParticleTable::getDeltaType(), G4INCL::ParticleTable::getIsospin(), G4INCL::ParticleTable::getKaonType(), G4INCL::Particle::getType(), G4INCL::Particle::isResonance(), G4INCL::Lambda, G4InuclParticleNames::nucleon(), particle1, particle2, sampleDeltaMass(), G4INCL::Particle::setMass(), G4INCL::Particle::setType(), G4INCL::Random::shoot(), G4INCL::KinematicsUtils::totalEnergyInCM(), and anonymous_namespace{G4CascadeDeexciteBase.cc}::zero.

getFinalState()

FinalState * G4INCL::IChannel::getFinalState ( )

inherited

Definition at line 50 of file G4INCLIChannel.cc.

                                      {
    FinalState *fs = new FinalState;
    fillFinalState(fs);
    return fs;
  }

References G4INCL::IChannel::fillFinalState().

INCL_DECLARE_ALLOCATION_POOL()

G4INCL::NDeltaToDeltaLKChannel::INCL_DECLARE_ALLOCATION_POOL ( NDeltaToDeltaLKChannel  )

private

sampleDeltaMass()

G4double G4INCL::NDeltaToDeltaLKChannel::sampleDeltaMass ( G4double  ecm )

private

Definition at line 57 of file G4INCLNDeltaToDeltaLKChannel.cc.

                                                                 {
        const G4double maxDeltaMass = ecm - ParticleTable::effectiveLambdaMass - ParticleTable::effectiveKaonMass - 1.0;
        const G4double maxDeltaMassRndm = std::atan((maxDeltaMass-ParticleTable::effectiveDeltaMass)*2./ParticleTable::effectiveDeltaWidth);
        const G4double deltaMassRndmRange = maxDeltaMassRndm - ParticleTable::minDeltaMassRndm;
// assert(deltaMassRndmRange>0.);
 
        G4double y=ecm*ecm;
        G4double q2=(y-1.157776E6)*(y-6.4E5)/y/4.0; // 1.157776E6 = 1076^2 = (mNucleon + mPion)^2, 6.4E5 = 800^2 = (mNucleon - mPion)^2
        G4double q3=std::pow(std::sqrt(q2), 3.);
        const G4double f3max=q3/(q3+5.832E6); // 5.832E6 = 180^3 = ???^3
        G4double x;
 
        G4int nTries = 0;
        G4bool success = false;
        while(!success) { /* Loop checking, 10.07.2015, D.Mancusi */
            if(++nTries >= 100000) {
                INCL_WARN("NDeltaToDeltaLKChannel::sampleDeltaMass loop was stopped because maximum number of tries was reached. Minimum delta mass "
                          << ParticleTable::minDeltaMass << " MeV with CM energy " << ecm << " MeV may be unphysical." << '\n');
                return ParticleTable::minDeltaMass;
            }
            
            G4double rndm = ParticleTable::minDeltaMassRndm + Random::shoot() * deltaMassRndmRange;
            y = std::tan(rndm);
            x = ParticleTable::effectiveDeltaMass + 0.5*ParticleTable::effectiveDeltaWidth*y;
// assert(x>=ParticleTable::minDeltaMass && ecm >= x + ParticleTable::effectiveLambdaMass + ParticleTable::effectiveKaonMass + 1.0);
            
            // generation of the delta mass with the penetration factor
            // (see prc56(1997)2431)
            y=x*x;
            q2=(y-1.157776E6)*(y-6.4E5)/y/4.0; // 1.157776E6 = 1076^2 = (mNucleon + mPion)^2, 6.4E5 = 800^2 = (mNucleon - mPion)^2
            q3=std::pow(std::sqrt(q2), 3.);
            const G4double f3=q3/(q3+5.832E6); // 5.832E6 = 180^3 = ???^3
            rndm = Random::shoot();
            if (rndm*f3max < f3)
            success = true;
        }
        return x;
    }

References G4INCL::ParticleTable::effectiveDeltaMass, G4INCL::ParticleTable::effectiveDeltaWidth, G4INCL::ParticleTable::effectiveKaonMass, G4INCL::ParticleTable::effectiveLambdaMass, INCL_WARN, G4INCL::ParticleTable::minDeltaMass, G4INCL::ParticleTable::minDeltaMassRndm, and G4INCL::Random::shoot().

Referenced by fillFinalState().

Field Documentation

angularSlope

const G4double G4INCL::NDeltaToDeltaLKChannel::angularSlope = 2.

staticprivate

Definition at line 59 of file G4INCLNDeltaToDeltaLKChannel.hh.

Referenced by fillFinalState().

particle1

Particle* G4INCL::NDeltaToDeltaLKChannel::particle1

private

Definition at line 57 of file G4INCLNDeltaToDeltaLKChannel.hh.

Referenced by fillFinalState().

particle2

Particle * G4INCL::NDeltaToDeltaLKChannel::particle2

private

Definition at line 57 of file G4INCLNDeltaToDeltaLKChannel.hh.

Referenced by fillFinalState().

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

• source/processes/hadronic/models/inclxx/incl_physics/include/G4INCLNDeltaToDeltaLKChannel.hh
• source/processes/hadronic/models/inclxx/incl_physics/src/G4INCLNDeltaToDeltaLKChannel.cc