#include <G4MuonDecayChannel.hh>

Inheritance diagram for G4MuonDecayChannel:

Public Member Functions
	G4MuonDecayChannel (const G4String &parentName, G4double BR)

	~G4MuonDecayChannel () override=default

G4DecayProducts *	DecayIt (G4double) override

Public Member Functions inherited from G4VDecayChannel
	G4VDecayChannel (const G4String &aName, G4int Verbose=1)

	G4VDecayChannel (const G4String &aName, const G4String &theParentName, G4double theBR, G4int theNumberOfDaughters, const G4String &theDaughterName1, const G4String &theDaughterName2="", const G4String &theDaughterName3="", const G4String &theDaughterName4="", const G4String &theDaughterName5="")

virtual	~G4VDecayChannel ()

G4bool	operator== (const G4VDecayChannel &r) const

G4bool	operator!= (const G4VDecayChannel &r) const

G4bool	operator< (const G4VDecayChannel &right) const

const G4String &	GetKinematicsName () const

G4double	GetBR () const

G4int	GetNumberOfDaughters () const

G4ParticleDefinition *	GetParent ()

G4ParticleDefinition *	GetDaughter (G4int anIndex)

G4int	GetAngularMomentum ()

const G4String &	GetParentName () const

const G4String &	GetDaughterName (G4int anIndex) const

G4double	GetParentMass () const

G4double	GetDaughterMass (G4int anIndex) const

void	SetParent (const G4ParticleDefinition *particle_type)

void	SetParent (const G4String &particle_name)

void	SetBR (G4double value)

void	SetNumberOfDaughters (G4int value)

void	SetDaughter (G4int anIndex, const G4ParticleDefinition *particle_type)

void	SetDaughter (G4int anIndex, const G4String &particle_name)

void	SetVerboseLevel (G4int value)

G4int	GetVerboseLevel () const

void	DumpInfo ()

G4double	GetRangeMass () const

void	SetRangeMass (G4double val)

virtual G4bool	IsOKWithParentMass (G4double parentMass)

void	SetPolarization (const G4ThreeVector &)

const G4ThreeVector &	GetPolarization () const

Protected Member Functions
	G4MuonDecayChannel ()=default

	G4MuonDecayChannel (const G4MuonDecayChannel &)=default

G4MuonDecayChannel &	operator= (const G4MuonDecayChannel &)

Protected Member Functions inherited from G4VDecayChannel
	G4VDecayChannel ()

	G4VDecayChannel (const G4VDecayChannel &)

G4VDecayChannel &	operator= (const G4VDecayChannel &)

void	ClearDaughtersName ()

void	CheckAndFillDaughters ()

void	CheckAndFillParent ()

G4double	DynamicalMass (G4double massPDG, G4double width, G4double maxDev=1.0) const

Additional Inherited Members
Protected Attributes inherited from G4VDecayChannel
G4String	kinematics_name = ""

G4double	rbranch = 0.0

G4String *	parent_name = nullptr

G4String **	daughters_name = nullptr

G4double	rangeMass = 2.5

G4ThreeVector	parent_polarization

G4ParticleTable *	particletable = nullptr

G4ParticleDefinition *	G4MT_parent = nullptr

G4ParticleDefinition **	G4MT_daughters = nullptr

G4double	G4MT_parent_mass = 0.0

G4double *	G4MT_daughters_mass = nullptr

G4double *	G4MT_daughters_width = nullptr

G4Mutex	daughtersMutex

G4Mutex	parentMutex

G4int	numberOfDaughters = 0

G4int	verboseLevel = 1

Static Protected Attributes inherited from G4VDecayChannel
static const G4String	noName = " "

Detailed Description

Definition at line 43 of file G4MuonDecayChannel.hh.

Constructor & Destructor Documentation

◆ G4MuonDecayChannel() [1/3]

G4MuonDecayChannel::G4MuonDecayChannel	(	const G4String &	parentName,
		G4double	BR )

Definition at line 46 of file G4MuonDecayChannel.cc.

  : G4VDecayChannel("Muon Decay", 1)
{
  // set names for daughter particles
  if (theParentName == "mu+") {
    SetBR(theBR);
    SetParent("mu+");
    SetNumberOfDaughters(3);
    SetDaughter(0, "e+");
    SetDaughter(1, "nu_e");
    SetDaughter(2, "anti_nu_mu");
  }
  else if (theParentName == "mu-") {
    SetBR(theBR);
    SetParent("mu-");
    SetNumberOfDaughters(3);
    SetDaughter(0, "e-");
    SetDaughter(1, "anti_nu_e");
    SetDaughter(2, "nu_mu");
  }
  else {
#ifdef G4VERBOSE
    if (GetVerboseLevel() > 0) {
      G4cout << "G4MuonDecayChannel:: constructor :";
      G4cout << " parent particle is not muon but ";
      G4cout << theParentName << G4endl;
    }
#endif
  }
}

◆ ~G4MuonDecayChannel()

G4MuonDecayChannel::~G4MuonDecayChannel ( )

overridedefault

◆ G4MuonDecayChannel() [2/3]

G4MuonDecayChannel::G4MuonDecayChannel ( )

protecteddefault

◆ G4MuonDecayChannel() [3/3]

G4MuonDecayChannel::G4MuonDecayChannel ( const G4MuonDecayChannel & )

protecteddefault

Member Function Documentation

◆ DecayIt()

G4DecayProducts * G4MuonDecayChannel::DecayIt ( G4double )

overridevirtual

Implements G4VDecayChannel.

Reimplemented in G4MuonDecayChannelWithSpin.

Definition at line 104 of file G4MuonDecayChannel.cc.

{
  // this version neglects muon polarization,and electron mass
  //              assumes the pure V-A coupling
  //              the Neutrinos are correctly V-A
 
#ifdef G4VERBOSE
  if (GetVerboseLevel() > 1) G4cout << "G4MuonDecayChannel::DecayIt ";
#endif
 
  CheckAndFillParent();
  CheckAndFillDaughters();
 
  // parent mass
  G4double parentmass = G4MT_parent->GetPDGMass();
  const G4int N_DAUGHTER = 3;
 
  // daughters'mass
  G4double daughtermass[N_DAUGHTER];
  // G4double sumofdaughtermass = 0.0;
  for (G4int index = 0; index < N_DAUGHTER; ++index) {
    daughtermass[index] = G4MT_daughters[index]->GetPDGMass();
    // sumofdaughtermass += daughtermass[index];
  }
 
  // create parent G4DynamicParticle at rest
  G4ThreeVector dummy;
  auto parentparticle = new G4DynamicParticle(G4MT_parent, dummy, 0.0);
  // create G4Decayproducts
  auto products = new G4DecayProducts(*parentparticle);
  delete parentparticle;
 
  // calculate daughter momentum
  G4double daughtermomentum[N_DAUGHTER];
  // calculate electron energy
  G4double xmax = (1.0 + daughtermass[0] * daughtermass[0] / parentmass / parentmass);
  G4double x;
 
  G4double Ee, Ene;
 
  G4double gam;
  G4double EMax = parentmass / 2 - daughtermass[0];
 
  const std::size_t MAX_LOOP = 1000;
  // Generating Random Energy
  for (std::size_t loop1 = 0; loop1 < MAX_LOOP; ++loop1) {
    Ee = G4UniformRand();
    for (std::size_t loop2 = 0; loop2 < MAX_LOOP; ++loop2) {
      x = xmax * G4UniformRand();
      gam = G4UniformRand();
      if (gam <= x * (1. - x)) break;
      x = xmax;
    }
    Ene = x;
    if (Ene >= (1. - Ee)) break;
    Ene = 1. - Ee;
  }
  G4double Enm = (2. - Ee - Ene);
 
  // initialisation of rotation parameters
 
  G4double costheta, sintheta, rphi, rtheta, rpsi;
  costheta = 1. - 2. / Ee - 2. / Ene + 2. / Ene / Ee;
  sintheta = std::sqrt(1. - costheta * costheta);
 
  rphi = twopi * G4UniformRand() * rad;
  rtheta = (std::acos(2. * G4UniformRand() - 1.));
  rpsi = twopi * G4UniformRand() * rad;
 
  G4RotationMatrix rot;
  rot.set(rphi, rtheta, rpsi);
 
  // electron 0
  daughtermomentum[0] = std::sqrt(Ee * Ee * EMax * EMax + 2.0 * Ee * EMax * daughtermass[0]);
  G4ThreeVector direction0(0.0, 0.0, 1.0);
 
  direction0 *= rot;
 
  auto daughterparticle =
    new G4DynamicParticle(G4MT_daughters[0], direction0 * daughtermomentum[0]);
 
  products->PushProducts(daughterparticle);
 
  // electronic neutrino  1
 
  daughtermomentum[1] = std::sqrt(Ene * Ene * EMax * EMax + 2.0 * Ene * EMax * daughtermass[1]);
  G4ThreeVector direction1(sintheta, 0.0, costheta);
 
  direction1 *= rot;
 
  auto daughterparticle1 =
    new G4DynamicParticle(G4MT_daughters[1], direction1 * daughtermomentum[1]);
  products->PushProducts(daughterparticle1);
 
  // muonnic neutrino 2
 
  daughtermomentum[2] = std::sqrt(Enm * Enm * EMax * EMax + 2.0 * Enm * EMax * daughtermass[2]);
  G4ThreeVector direction2(-Ene / Enm * sintheta, 0, -Ee / Enm - Ene / Enm * costheta);
 
  direction2 *= rot;
 
  auto daughterparticle2 =
    new G4DynamicParticle(G4MT_daughters[2], direction2 * daughtermomentum[2]);
  products->PushProducts(daughterparticle2);
 
  // output message
#ifdef G4VERBOSE
  if (GetVerboseLevel() > 1) {
    G4cout << "G4MuonDecayChannel::DecayIt()";
    G4cout << " create decay products in rest frame " << G4endl;
    products->DumpInfo();
  }
#endif
  return products;
}

◆ operator=()

G4MuonDecayChannel & G4MuonDecayChannel::operator= ( const G4MuonDecayChannel & right )

protected

Definition at line 77 of file G4MuonDecayChannel.cc.

{
  if (this != &right) {
    kinematics_name = right.kinematics_name;
    verboseLevel = right.verboseLevel;
    rbranch = right.rbranch;
 
    // copy parent name
    parent_name = new G4String(*right.parent_name);
 
    // clear daughters_name array
    ClearDaughtersName();
 
    // recreate array
    numberOfDaughters = right.numberOfDaughters;
    if (numberOfDaughters > 0) {
      if (daughters_name != nullptr) ClearDaughtersName();
      daughters_name = new G4String*[numberOfDaughters];
      // copy daughters name
      for (G4int index = 0; index < numberOfDaughters; ++index) {
        daughters_name[index] = new G4String(*right.daughters_name[index]);
      }
    }
  }
  return *this;
}

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

Public Member Functions

Protected Member Functions

Additional Inherited Members