Geant4-11
Public Member Functions | Protected Member Functions | Private Attributes
G4VHadPhaseSpaceAlgorithm Class Referenceabstract

#include <G4VHadPhaseSpaceAlgorithm.hh>

Inheritance diagram for G4VHadPhaseSpaceAlgorithm:
G4VHadDecayAlgorithm G4HadPhaseSpaceGenbod G4HadPhaseSpaceKopylov G4HadPhaseSpaceNBodyAsai

Public Member Functions

 G4VHadPhaseSpaceAlgorithm (const G4String &algName, G4int verbose=0)
 
void Generate (G4double initialMass, const std::vector< G4double > &masses, std::vector< G4LorentzVector > &finalState)
 
const G4String & GetName () const
 
G4int GetVerboseLevel () const
 
virtual void SetVerboseLevel (G4int verbose)
 
virtual ~G4VHadPhaseSpaceAlgorithm ()
 

Protected Member Functions

virtual void GenerateMultiBody (G4double initialMass, const std::vector< G4double > &masses, std::vector< G4LorentzVector > &finalState)=0
 
virtual void GenerateTwoBody (G4double initialMass, const std::vector< G4double > &masses, std::vector< G4LorentzVector > &finalState)
 
virtual G4bool IsDecayAllowed (G4double initialMass, const std::vector< G4double > &masses) const
 
void PrintVector (const std::vector< G4double > &v, const G4String &name, std::ostream &os) const
 
G4double TwoBodyMomentum (G4double M0, G4double M1, G4double M2) const
 
G4double UniformPhi () const
 
G4double UniformTheta () const
 
G4ThreeVector UniformVector (G4double mag=1.) const
 

Private Attributes

G4String name
 
G4int verboseLevel
 

Detailed Description

Definition at line 43 of file G4VHadPhaseSpaceAlgorithm.hh.

Constructor & Destructor Documentation

◆ G4VHadPhaseSpaceAlgorithm()

G4VHadPhaseSpaceAlgorithm::G4VHadPhaseSpaceAlgorithm ( const G4String &  algName,
G4int  verbose = 0 
)
inline

Definition at line 45 of file G4VHadPhaseSpaceAlgorithm.hh.

46 : G4VHadDecayAlgorithm(algName, verbose) {;}
G4VHadDecayAlgorithm::G4VHadDecayAlgorithm
G4VHadDecayAlgorithm(const G4String &algName, G4int verbose=0)
Definition: G4VHadDecayAlgorithm.hh:44

◆ ~G4VHadPhaseSpaceAlgorithm()

virtual G4VHadPhaseSpaceAlgorithm::~G4VHadPhaseSpaceAlgorithm ( )
inlinevirtual

Definition at line 47 of file G4VHadPhaseSpaceAlgorithm.hh.

47{;}

Member Function Documentation

◆ Generate()

void G4VHadDecayAlgorithm::Generate ( G4double  initialMass,
const std::vector< G4double > &  masses,
std::vector< G4LorentzVector > &  finalState 
)
inherited

Definition at line 48 of file G4VHadDecayAlgorithm.cc.

50 {
51 if (verboseLevel) G4cout << GetName() << "::Generate" << G4endl;
52
53 // Initialization and sanity check
54 finalState.clear();
55 if (!IsDecayAllowed(initialMass, masses)) return;
56
57 // Allow different procedures for two-body or N-body distributions
58 if (masses.size() == 2U)
59 GenerateTwoBody(initialMass, masses, finalState);
60 else
61 GenerateMultiBody(initialMass, masses, finalState);
62}
G4endl
#define G4endl
Definition: G4ios.hh:57
G4cout
G4GLOB_DLL std::ostream G4cout
G4VHadDecayAlgorithm::GenerateTwoBody
virtual void GenerateTwoBody(G4double initialMass, const std::vector< G4double > &masses, std::vector< G4LorentzVector > &finalState)=0
G4VHadDecayAlgorithm::GetName
const G4String & GetName() const
Definition: G4VHadDecayAlgorithm.hh:56
G4VHadDecayAlgorithm::IsDecayAllowed
virtual G4bool IsDecayAllowed(G4double initialMass, const std::vector< G4double > &masses) const
Definition: G4VHadDecayAlgorithm.cc:68
G4VHadDecayAlgorithm::GenerateMultiBody
virtual void GenerateMultiBody(G4double initialMass, const std::vector< G4double > &masses, std::vector< G4LorentzVector > &finalState)=0

References G4cout, G4endl, G4VHadDecayAlgorithm::GenerateMultiBody(), G4VHadDecayAlgorithm::GenerateTwoBody(), G4VHadDecayAlgorithm::GetName(), G4VHadDecayAlgorithm::IsDecayAllowed(), and G4VHadDecayAlgorithm::verboseLevel.

Referenced by G4HadDecayGenerator::Generate().

◆ GenerateMultiBody()

virtual void G4VHadDecayAlgorithm::GenerateMultiBody ( G4double  initialMass,
const std::vector< G4double > &  masses,
std::vector< G4LorentzVector > &  finalState 
)
protectedpure virtualinherited

Implemented in G4CascadeFinalStateAlgorithm, G4HadPhaseSpaceGenbod, G4HadPhaseSpaceKopylov, and G4HadPhaseSpaceNBodyAsai.

Referenced by G4VHadDecayAlgorithm::Generate().

◆ GenerateTwoBody()

void G4VHadPhaseSpaceAlgorithm::GenerateTwoBody ( G4double  initialMass,
const std::vector< G4double > &  masses,
std::vector< G4LorentzVector > &  finalState 
)
protectedvirtual

Implements G4VHadDecayAlgorithm.

Definition at line 50 of file G4VHadPhaseSpaceAlgorithm.cc.

53 {
54 if (GetVerboseLevel()>1)
55 G4cout << " >>> G4HadDecayGenerator::FillTwoBody" << G4endl;
56
57 // Initialization and sanity check
58 finalState.clear();
59 if (masses.size() != 2U) return; // Should not have been called
60
61 // Momentum of final state (energy balance has already been checked)
62 G4double p = TwoBodyMomentum(initialMass,masses[0],masses[1]);
63 if (GetVerboseLevel()>2) G4cout << " finalState momentum = " << p << G4endl;
64
65 finalState.resize(2); // Allows filling by index
66 finalState[0].setVectM(UniformVector(p), masses[0]);
67 finalState[1].setVectM(-finalState[0].vect(), masses[1]);
68}
G4double
double G4double
Definition: G4Types.hh:83
G4VHadDecayAlgorithm::TwoBodyMomentum
G4double TwoBodyMomentum(G4double M0, G4double M1, G4double M2) const
Definition: G4VHadDecayAlgorithm.cc:90
G4VHadPhaseSpaceAlgorithm::UniformVector
G4ThreeVector UniformVector(G4double mag=1.) const
Definition: G4VHadPhaseSpaceAlgorithm.cc:73

References G4cout, G4endl, G4VHadDecayAlgorithm::GetVerboseLevel(), G4VHadDecayAlgorithm::TwoBodyMomentum(), and UniformVector().

◆ GetName()

const G4String & G4VHadDecayAlgorithm::GetName ( ) const
inlineinherited

Definition at line 56 of file G4VHadDecayAlgorithm.hh.

56{ return name; }

References G4VHadDecayAlgorithm::name.

Referenced by G4HadPhaseSpaceGenbod::AcceptEvent(), G4HadPhaseSpaceGenbod::AccumulateFinalState(), G4CascadeFinalStateAlgorithm::ChooseGenerators(), G4HadPhaseSpaceGenbod::ComputeWeight(), G4HadPhaseSpaceGenbod::ComputeWeightScale(), G4CascadeFinalStateAlgorithm::Configure(), G4CascadeFinalStateAlgorithm::FillDirections(), G4CascadeFinalStateAlgorithm::FillDirManyBody(), G4CascadeFinalStateAlgorithm::FillDirThreeBody(), G4HadPhaseSpaceGenbod::FillEnergySteps(), G4CascadeFinalStateAlgorithm::FillMagnitudes(), G4HadPhaseSpaceGenbod::FillRandomBuffer(), G4CascadeFinalStateAlgorithm::FillUsingKopylov(), G4HadDecayGenerator::G4HadDecayGenerator(), G4VHadDecayAlgorithm::Generate(), G4CascadeFinalStateAlgorithm::GenerateCosTheta(), G4HadPhaseSpaceGenbod::GenerateMomenta(), G4CascadeFinalStateAlgorithm::GenerateMultiBody(), G4HadPhaseSpaceGenbod::GenerateMultiBody(), G4HadPhaseSpaceKopylov::GenerateMultiBody(), G4HadPhaseSpaceNBodyAsai::GenerateMultiBody(), G4CascadeFinalStateAlgorithm::GenerateTwoBody(), G4HadDecayGenerator::GetAlgorithmName(), G4HadPhaseSpaceGenbod::Initialize(), G4VHadDecayAlgorithm::IsDecayAllowed(), G4CascadeFinalStateAlgorithm::satisfyTriangle(), G4CascadeFinalStateAlgorithm::SaveKinematics(), and G4VHadDecayAlgorithm::TwoBodyMomentum().

◆ GetVerboseLevel()

G4int G4VHadDecayAlgorithm::GetVerboseLevel ( ) const
inlineinherited

Definition at line 55 of file G4VHadDecayAlgorithm.hh.

55{ return verboseLevel; }

References G4VHadDecayAlgorithm::verboseLevel.

Referenced by G4HadPhaseSpaceGenbod::AcceptEvent(), G4HadPhaseSpaceGenbod::AccumulateFinalState(), G4CascadeFinalStateAlgorithm::ChooseGenerators(), G4HadPhaseSpaceGenbod::ComputeWeight(), G4HadPhaseSpaceGenbod::ComputeWeightScale(), G4CascadeFinalStateAlgorithm::Configure(), G4CascadeFinalStateAlgorithm::FillDirections(), G4CascadeFinalStateAlgorithm::FillDirManyBody(), G4CascadeFinalStateAlgorithm::FillDirThreeBody(), G4HadPhaseSpaceGenbod::FillEnergySteps(), G4CascadeFinalStateAlgorithm::FillMagnitudes(), G4HadPhaseSpaceGenbod::FillRandomBuffer(), G4CascadeFinalStateAlgorithm::FillUsingKopylov(), G4CascadeFinalStateAlgorithm::GenerateCosTheta(), G4HadPhaseSpaceGenbod::GenerateMomenta(), G4CascadeFinalStateAlgorithm::GenerateMultiBody(), G4HadPhaseSpaceGenbod::GenerateMultiBody(), G4HadPhaseSpaceKopylov::GenerateMultiBody(), G4HadPhaseSpaceNBodyAsai::GenerateMultiBody(), G4CascadeFinalStateAlgorithm::GenerateTwoBody(), GenerateTwoBody(), G4HadPhaseSpaceGenbod::Initialize(), G4CascadeFinalStateAlgorithm::satisfyTriangle(), and G4CascadeFinalStateAlgorithm::SaveKinematics().

◆ IsDecayAllowed()

G4bool G4VHadDecayAlgorithm::IsDecayAllowed ( G4double  initialMass,
const std::vector< G4double > &  masses 
) const
protectedvirtualinherited

Definition at line 67 of file G4VHadDecayAlgorithm.cc.

69 {
70 G4bool okay =
71 (initialMass > 0. && masses.size() >= 2 &&
72 initialMass >= std::accumulate(masses.begin(),masses.end(),0.));
73
74 if (verboseLevel) {
75 G4cout << GetName() << "::IsDecayAllowed? initialMass " << initialMass
76 << " " << masses.size() << " masses sum "
77 << std::accumulate(masses.begin(),masses.end(),0.) << G4endl;
78
79 if (verboseLevel>1) PrintVector(masses," ",G4cout);
80
81 G4cout << " Returning " << okay << G4endl;
82 }
83
84 return okay;
85}
G4bool
bool G4bool
Definition: G4Types.hh:86
G4VHadDecayAlgorithm::PrintVector
void PrintVector(const std::vector< G4double > &v, const G4String &name, std::ostream &os) const
Definition: G4VHadDecayAlgorithm.cc:122

References G4cout, G4endl, G4VHadDecayAlgorithm::GetName(), G4VHadDecayAlgorithm::PrintVector(), and G4VHadDecayAlgorithm::verboseLevel.

Referenced by G4VHadDecayAlgorithm::Generate().

◆ PrintVector()

void G4VHadDecayAlgorithm::PrintVector ( const std::vector< G4double > &  v,
const G4String &  name,
std::ostream &  os 
) const
protectedinherited

Definition at line 121 of file G4VHadDecayAlgorithm.cc.

123 {
124 os << " " << vname << "(" << v.size() << ") ";
125 std::copy(v.begin(), v.end(), std::ostream_iterator<G4double>(os, " "));
126 os << std::endl;
127}
field_utils::copy
void copy(G4double dst[], const G4double src[], size_t size=G4FieldTrack::ncompSVEC)
Definition: G4FieldUtils.cc:98

References field_utils::copy().

Referenced by G4HadPhaseSpaceGenbod::FillEnergySteps(), G4HadPhaseSpaceGenbod::FillRandomBuffer(), G4HadPhaseSpaceNBodyAsai::GenerateMultiBody(), G4HadPhaseSpaceGenbod::Initialize(), and G4VHadDecayAlgorithm::IsDecayAllowed().

◆ SetVerboseLevel()

virtual void G4VHadDecayAlgorithm::SetVerboseLevel ( G4int  verbose)
inlinevirtualinherited

Reimplemented in G4CascadeFinalStateAlgorithm.

Definition at line 54 of file G4VHadDecayAlgorithm.hh.

54{ verboseLevel = verbose; }

References G4VHadDecayAlgorithm::verboseLevel.

Referenced by G4CascadeFinalStateAlgorithm::SetVerboseLevel(), and G4HadDecayGenerator::SetVerboseLevel().

◆ TwoBodyMomentum()

G4double G4VHadDecayAlgorithm::TwoBodyMomentum ( G4double  M0,
G4double  M1,
G4double  M2 
) const
protectedinherited

Definition at line 90 of file G4VHadDecayAlgorithm.cc.

91 {
92 G4double PSQ = (M0+M1+M2)*(M0+M1-M2)*(M0-M1+M2)*(M0-M1-M2);
93 if (PSQ < 0.) {
94 G4cout << GetName() << ": problem of decay of M(GeV) " << M0/GeV
95 << " to M1(GeV) " << M1/GeV << " and M2(GeV) " << M2/GeV
96 << " PSQ(MeV) " << PSQ/MeV << " < 0" << G4endl;
97 // exception only if the problem is numerically significant
98 if (PSQ < -CLHEP::eV) {
99 throw G4HadronicException(__FILE__, __LINE__,"Error in decay kinematics");
100 }
101
102 PSQ = 0.;
103 }
104
105 return std::sqrt(PSQ)/(2.*M0);
106}
GeV
static constexpr double GeV
Definition: G4SIunits.hh:203
MeV
static constexpr double MeV
Definition: G4SIunits.hh:200
CLHEP::eV
static constexpr double eV
Definition: SystemOfUnits.h:182

References CLHEP::eV, G4cout, G4endl, G4VHadDecayAlgorithm::GetName(), GeV, and MeV.

Referenced by G4HadPhaseSpaceGenbod::ComputeWeightScale(), G4HadPhaseSpaceGenbod::FillEnergySteps(), G4CascadeFinalStateAlgorithm::FillUsingKopylov(), G4HadPhaseSpaceKopylov::GenerateMultiBody(), G4HadPhaseSpaceNBodyAsai::GenerateMultiBody(), G4CascadeFinalStateAlgorithm::GenerateTwoBody(), and GenerateTwoBody().

◆ UniformPhi()

G4double G4VHadDecayAlgorithm::UniformPhi ( ) const
protectedinherited

Definition at line 114 of file G4VHadDecayAlgorithm.cc.

114 {
115 return twopi*G4UniformRand();
116}
twopi
static constexpr double twopi
Definition: G4SIunits.hh:56
G4UniformRand
#define G4UniformRand()
Definition: Randomize.hh:52

References G4UniformRand, and twopi.

Referenced by G4CascadeFinalStateAlgorithm::FillUsingKopylov(), G4CascadeFinalStateAlgorithm::GenerateTwoBody(), and UniformVector().

◆ UniformTheta()

G4double G4VHadDecayAlgorithm::UniformTheta ( ) const
protectedinherited

Definition at line 110 of file G4VHadDecayAlgorithm.cc.

110 {
111 return std::acos(2.0*G4UniformRand() - 1.0);
112}

References G4UniformRand.

Referenced by G4CascadeFinalStateAlgorithm::FillUsingKopylov(), and UniformVector().

◆ UniformVector()

G4ThreeVector G4VHadPhaseSpaceAlgorithm::UniformVector ( G4double  mag = 1.) const
protected

Definition at line 73 of file G4VHadPhaseSpaceAlgorithm.cc.

73 {
74 // FIXME: Should this be made a static thread-local buffer?
75 G4ThreeVector v;
76 v.setRThetaPhi(mag, UniformTheta(), UniformPhi());
77 return v;
78}
CLHEP::Hep3Vector::setRThetaPhi
void setRThetaPhi(double r, double theta, double phi)
G4VHadDecayAlgorithm::UniformTheta
G4double UniformTheta() const
Definition: G4VHadDecayAlgorithm.cc:110

References CLHEP::Hep3Vector::setRThetaPhi(), G4VHadDecayAlgorithm::UniformPhi(), and G4VHadDecayAlgorithm::UniformTheta().

Referenced by G4HadPhaseSpaceKopylov::GenerateMultiBody(), G4HadPhaseSpaceNBodyAsai::GenerateMultiBody(), and GenerateTwoBody().

Field Documentation

◆ name

G4String G4VHadDecayAlgorithm::name
privateinherited

Definition at line 85 of file G4VHadDecayAlgorithm.hh.

Referenced by source.g4viscp.G4Scene::create_scene(), G4VHadDecayAlgorithm::GetName(), mcscore.MCParticle::printout(), and source.g4viscp.G4Scene::update_scene().

◆ verboseLevel

G4int G4VHadDecayAlgorithm::verboseLevel
privateinherited

Definition at line 86 of file G4VHadDecayAlgorithm.hh.

Referenced by G4VHadDecayAlgorithm::Generate(), G4VHadDecayAlgorithm::GetVerboseLevel(), G4VHadDecayAlgorithm::IsDecayAllowed(), and G4VHadDecayAlgorithm::SetVerboseLevel().

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