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G4PionDecayMakeSpin Class Reference

#include <G4PionDecayMakeSpin.hh>

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Public Member Functions

 G4PionDecayMakeSpin (const G4String &processName="Decay")
 
virtual ~G4PionDecayMakeSpin ()
 
- Public Member Functions inherited from G4Decay
 G4Decay (const G4String &processName="Decay")
 
virtual ~G4Decay ()
 
virtual G4VParticleChange * PostStepDoIt (const G4Track &aTrack, const G4Step &aStep)
 
virtual G4VParticleChange * AtRestDoIt (const G4Track &aTrack, const G4Step &aStep)
 
virtual void BuildPhysicsTable (const G4ParticleDefinition &)
 
virtual G4bool IsApplicable (const G4ParticleDefinition &)
 
virtual G4double AtRestGetPhysicalInteractionLength (const G4Track &track, G4ForceCondition *condition)
 
virtual G4double PostStepGetPhysicalInteractionLength (const G4Track &track, G4double previousStepSize, G4ForceCondition *condition)
 
virtual void StartTracking (G4Track *)
 
virtual void EndTracking ()
 
void SetExtDecayer (G4VExtDecayer *)
 
const G4VExtDecayer * GetExtDecayer () const
 
G4double GetRemainderLifeTime () const
 
void SetVerboseLevel (G4int value)
 
G4int GetVerboseLevel () const
 
- Public Member Functions inherited from G4VRestDiscreteProcess
 G4VRestDiscreteProcess (const G4String &, G4ProcessType aType=fNotDefined)
 
 G4VRestDiscreteProcess (G4VRestDiscreteProcess &)
 
virtual ~G4VRestDiscreteProcess ()
 
virtual G4double AlongStepGetPhysicalInteractionLength (const G4Track &, G4double, G4double, G4double &, G4GPILSelection *)
 
virtual G4VParticleChange * AlongStepDoIt (const G4Track &, const G4Step &)
 
- Public Member Functions inherited from G4VProcess
 G4VProcess (const G4String &aName="NoName", G4ProcessType aType=fNotDefined)
 
 G4VProcess (const G4VProcess &right)
 
virtual ~G4VProcess ()
 
G4int operator== (const G4VProcess &right) const
 
G4int operator!= (const G4VProcess &right) const
 
G4double GetCurrentInteractionLength () const
 
void SetPILfactor (G4double value)
 
G4double GetPILfactor () const
 
G4double AlongStepGPIL (const G4Track &track, G4double previousStepSize, G4double currentMinimumStep, G4double &proposedSafety, G4GPILSelection *selection)
 
G4double AtRestGPIL (const G4Track &track, G4ForceCondition *condition)
 
G4double PostStepGPIL (const G4Track &track, G4double previousStepSize, G4ForceCondition *condition)
 
virtual void PreparePhysicsTable (const G4ParticleDefinition &)
 
virtual G4bool StorePhysicsTable (const G4ParticleDefinition *, const G4String &, G4bool)
 
virtual G4bool RetrievePhysicsTable (const G4ParticleDefinition *, const G4String &, G4bool)
 
const G4String & GetPhysicsTableFileName (const G4ParticleDefinition *, const G4String &directory, const G4String &tableName, G4bool ascii=false)
 
const G4String & GetProcessName () const
 
G4ProcessType GetProcessType () const
 
void SetProcessType (G4ProcessType)
 
G4int GetProcessSubType () const
 
void SetProcessSubType (G4int)
 
virtual void SetProcessManager (const G4ProcessManager *)
 
virtual const G4ProcessManager * GetProcessManager ()
 
virtual void ResetNumberOfInteractionLengthLeft ()
 
G4double GetNumberOfInteractionLengthLeft () const
 
G4double GetTotalNumberOfInteractionLengthTraversed () const
 
G4bool isAtRestDoItIsEnabled () const
 
G4bool isAlongStepDoItIsEnabled () const
 
G4bool isPostStepDoItIsEnabled () const
 
virtual void DumpInfo () const
 
void SetVerboseLevel (G4int value)
 
G4int GetVerboseLevel () const
 
virtual void SetMasterProcess (G4VProcess *masterP)
 
const G4VProcess * GetMasterProcess () const
 
virtual void BuildWorkerPhysicsTable (const G4ParticleDefinition &part)
 
virtual void PrepareWorkerPhysicsTable (const G4ParticleDefinition &)
 

Protected Member Functions

virtual void DaughterPolarization (const G4Track &aTrack, G4DecayProducts *products)
 
- Protected Member Functions inherited from G4Decay
virtual G4VParticleChange * DecayIt (const G4Track &aTrack, const G4Step &aStep)
 
virtual G4double GetMeanFreePath (const G4Track &aTrack, G4double previousStepSize, G4ForceCondition *condition)
 
virtual G4double GetMeanLifeTime (const G4Track &aTrack, G4ForceCondition *condition)
 
- Protected Member Functions inherited from G4VProcess
void SubtractNumberOfInteractionLengthLeft (G4double previousStepSize)
 
void ClearNumberOfInteractionLengthLeft ()
 

Additional Inherited Members

- Static Public Member Functions inherited from G4VProcess
static const G4String & GetProcessTypeName (G4ProcessType)
 
- Protected Attributes inherited from G4Decay
G4int verboseLevel
 
const G4double HighestValue
 
G4double fRemainderLifeTime
 
G4ParticleChangeForDecay fParticleChangeForDecay
 
G4VExtDecayer * pExtDecayer
 
- Protected Attributes inherited from G4VProcess
const G4ProcessManager * aProcessManager
 
G4VParticleChange * pParticleChange
 
G4ParticleChange aParticleChange
 
G4double theNumberOfInteractionLengthLeft
 
G4double currentInteractionLength
 
G4double theInitialNumberOfInteractionLength
 
G4String theProcessName
 
G4String thePhysicsTableFileName
 
G4ProcessType theProcessType
 
G4int theProcessSubType
 
G4double thePILfactor
 
G4bool enableAtRestDoIt
 
G4bool enableAlongStepDoIt
 
G4bool enablePostStepDoIt
 
G4int verboseLevel
 

Detailed Description

Definition at line 39 of file G4PionDecayMakeSpin.hh.

Constructor & Destructor Documentation

G4PionDecayMakeSpin::G4PionDecayMakeSpin ( const G4String &  processName = "Decay")

Definition at line 38 of file G4PionDecayMakeSpin.cc.

39  : G4Decay(processName)
40 {
41  // set Process Sub Type
42  SetProcessSubType(static_cast<int>(DECAY_PionMakeSpin));
43 
44 }
DECAY_PionMakeSpin
Definition: G4DecayProcessType.hh:47
G4VProcess::SetProcessSubType
void SetProcessSubType(G4int)
Definition: G4VProcess.hh:432
G4Decay::G4Decay
G4Decay(const G4String &processName="Decay")
Definition: G4Decay.cc:63

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G4PionDecayMakeSpin::~G4PionDecayMakeSpin ( )
virtual

Definition at line 46 of file G4PionDecayMakeSpin.cc.

46 { }

Member Function Documentation

void G4PionDecayMakeSpin::DaughterPolarization ( const G4Track &  aTrack,
G4DecayProducts *  products 
)
protectedvirtual

Reimplemented from G4Decay.

Definition at line 48 of file G4PionDecayMakeSpin.cc.

50 {
51  // This routine deals only with particles that can decay into a muon
52  // pi+, pi-, K+, K- and K0_long
53 
54  // get particle
55 
56  const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
57  const G4ParticleDefinition* aParticleDef = aParticle->GetDefinition();
58 
59  G4ParticleDefinition* aMuonPlus =
60  G4ParticleTable::GetParticleTable()->FindParticle("mu+");
61  G4ParticleDefinition* aMuonMinus =
62  G4ParticleTable::GetParticleTable()->FindParticle("mu-");
63  G4ParticleDefinition* aPionPlus =
64  G4ParticleTable::GetParticleTable()->FindParticle("pi+");
65  G4ParticleDefinition* aPionMinus =
66  G4ParticleTable::GetParticleTable()->FindParticle("pi-");
67  G4ParticleDefinition* aKaonPlus =
68  G4ParticleTable::GetParticleTable()->FindParticle("kaon+");
69  G4ParticleDefinition* aKaonMinus =
70  G4ParticleTable::GetParticleTable()->FindParticle("kaon-");
71  G4ParticleDefinition* aKaon0Long =
72  G4ParticleTable::GetParticleTable()->FindParticle("kaon0L");
73  G4ParticleDefinition* aNeutrinoMu =
74  G4ParticleTable::GetParticleTable()->FindParticle("nu_mu");
75  G4ParticleDefinition* aAntiNeutrinoMu =
76  G4ParticleTable::GetParticleTable()->FindParticle("anti_nu_mu");
77 
78  if( aParticleDef == aPionPlus ||
79  aParticleDef == aPionMinus ||
80  aParticleDef == aKaonPlus ||
81  aParticleDef == aKaonMinus ||
82  aParticleDef == aKaon0Long ) {
83  } else {
84  return;
85  }
86 
87  G4DynamicParticle* aMuon = NULL;
88 
89  G4double emu(0), eneutrino(0);
90  G4ThreeVector p_muon, p_neutrino;
91 
92  G4int numberOfSecondaries = products->entries();
93 
94  if (numberOfSecondaries > 0) {
95  for (G4int index=0; index < numberOfSecondaries; index++)
96  {
97  G4DynamicParticle* aSecondary = (*products)[index];
98  const G4ParticleDefinition* aSecondaryDef = aSecondary->GetDefinition();
99 
100  if (aSecondaryDef == aMuonPlus ||
101  aSecondaryDef == aMuonMinus ) {
102  // Muon+ or Muon-
103  aMuon = aSecondary;
104  emu = aSecondary->GetTotalEnergy();
105  p_muon = aSecondary->GetMomentum();
106  } else if (aSecondaryDef == aNeutrinoMu ||
107  aSecondaryDef == aAntiNeutrinoMu ) {
108  // Muon-Neutrino / Muon-Anti-Neutrino
109  eneutrino = aSecondary->GetTotalEnergy();
110  p_neutrino = aSecondary->GetMomentum();
111  }
112  }
113  }
114 
115  // This routine deals only with decays with a
116  // muon and mu-(anti)neutrinos in the final state
117 
118  if (!aMuon) return;
119  if (eneutrino==0||emu==0) return;
120 
121  G4ThreeVector spin(0,0,0);
122 
123  const G4DynamicParticle* theParentParticle = products->GetParentParticle();
124 
125  G4double amass = theParentParticle->GetMass();
126  G4double emmu = aMuonPlus->GetPDGMass();
127 
128  if (numberOfSecondaries == 2 ) {
129 
130  G4double scale = - (eneutrino - ( p_muon * p_neutrino )/(emu+emmu));
131 
132  p_muon = scale * p_muon;
133  p_neutrino = emmu * p_neutrino;
134  spin = p_muon + p_neutrino;
135 
136  scale = 2./(amass*amass-emmu*emmu);
137  spin = scale * spin;
138 
139  if (aParticle->GetCharge() < 0.0) spin = -spin;
140 
141  } else {
142 
143  spin = G4RandomDirection();
144 
145  }
146 
147  spin = spin.unit();
148 
149  aMuon->SetPolarization(spin.x(),spin.y(),spin.z());
150 
151  return;
152 }
G4ParticleTable::FindParticle
G4ParticleDefinition * FindParticle(G4int PDGEncoding)
Definition: G4ParticleTable.cc:566
G4DynamicParticle::GetTotalEnergy
G4double GetTotalEnergy() const
G4Track::GetDynamicParticle
const G4DynamicParticle * GetDynamicParticle() const
G4RandomDirection
G4ThreeVector G4RandomDirection()
Definition: G4RandomDirection.hh:56
G4DecayProducts::GetParentParticle
const G4DynamicParticle * GetParentParticle() const
Definition: G4DecayProducts.hh:73
G4DynamicParticle::GetDefinition
G4ParticleDefinition * GetDefinition() const
G4int
int G4int
Definition: G4Types.hh:78
G4DynamicParticle::GetMass
G4double GetMass() const
G4DynamicParticle::GetCharge
G4double GetCharge() const
G4DynamicParticle::SetPolarization
void SetPolarization(G4double polX, G4double polY, G4double polZ)
G4ParticleDefinition::GetPDGMass
G4double GetPDGMass() const
Definition: G4ParticleDefinition.hh:122
G4ParticleTable::GetParticleTable
static G4ParticleTable * GetParticleTable()
Definition: G4ParticleTable.cc:96
G4DecayProducts::entries
G4int entries() const
Definition: G4DecayProducts.hh:86
G4double
double G4double
Definition: G4Types.hh:76
G4DynamicParticle::GetMomentum
G4ThreeVector GetMomentum() const

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