Herwig
7.2.1
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Main class for Decayers implementing multi-channel phase space integration. More...
#include <DecayIntegrator.h>
Public Types | |
enum | MEOption { Initialize, Calculate, Terminate } |
Enum for the matrix element option. | |
Public Types inherited from Herwig::HwDecayerBase | |
enum | POWHEGType { No, ISR, FSR, Both } |
Virtual members to be overridden by inheriting classes which implement hard corrections. More... | |
Public Types inherited from ThePEG::InterfacedBase | |
enum | InitState |
Public Types inherited from ThePEG::Pointer::ReferenceCounted | |
typedef unsigned int | CounterType |
Public Member Functions | |
DecayIntegrator () | |
Default constructor. | |
virtual bool | accept (tcPDPtr parent, const tPDVector &children) const |
Check if this decayer can perfom the decay for a particular mode. More... | |
virtual ParticleVector | decay (const Particle &parent, const tPDVector &children) const |
For a given decay mode and a given particle instance, perform the decay and return the decay products. More... | |
virtual int | modeNumber (bool &cc, tcPDPtr parent, const tPDVector &children) const =0 |
Which of the possible decays is required. More... | |
int | imode () const |
The mode being used for this decay. | |
void | addMode (DecayPhaseSpaceModePtr mode, double maxwgt, const vector< double > wgts) const |
Add a phase-space mode to the list. More... | |
virtual double | me2 (const int ichan, const Particle &part, const ParticleVector &decay, MEOption opt) const =0 |
Return the matrix element squared for a given mode and phase-space channel. More... | |
DecayMEPtr | ME () const |
The helicity amplitude matrix element for spin correlations. | |
virtual bool | twoBodyMEcode (const DecayMode &, int &mecode, double &coupling) const |
Specify the matrix element to be used in the running width calculation. More... | |
virtual WidthCalculatorBasePtr | threeBodyMEIntegrator (const DecayMode &dm) const |
Method to return an object to calculate the 3 (or higher body) partial width. More... | |
virtual double | threeBodyMatrixElement (const int imode, const Energy2 q2, const Energy2 s3, const Energy2 s2, const Energy2 s1, const Energy m1, const Energy m2, const Energy m3) const |
The matrix element to be integrated for the three-body decays as a function of the invariant masses of pairs of the outgoing particles. More... | |
virtual InvEnergy | threeBodydGammads (const int imode, const Energy2 q2, const Energy2 s, const Energy m1, const Energy m2, const Energy m3) const |
The differential three body decay rate with one integral performed. More... | |
void | setPartialWidth (const DecayMode &dm, int imode) |
Set the code for the partial width. More... | |
int | findMode (const DecayMode &dm) |
Finds the phase-space mode corresponding to a given decay mode. More... | |
virtual void | dataBaseOutput (ofstream &os, bool header) const |
Output the setup information for the particle database. More... | |
Energy | epsilonPS () const |
Access to the epsilon parameter. | |
ParticleVector | generatePhotons (const Particle &p, ParticleVector children) |
Members for the generation of QED radiation in the decays. More... | |
bool | canGeneratePhotons () |
check if photons can be generated in the decay | |
virtual double | oneLoopVirtualME (unsigned int imode, const Particle &part, const ParticleVector &products) |
The one-loop virtual correction. More... | |
bool | hasOneLoopME () |
Whether or not the one loop matrix element is implemented. | |
virtual InvEnergy2 | realEmissionME (unsigned int imode, const Particle &part, ParticleVector &products, unsigned int iemitter, double ctheta, double stheta, const LorentzRotation &rot1, const LorentzRotation &rot2) |
The real emission matrix element. More... | |
bool | hasRealEmissionME () |
Whether or not the real emission matrix element is implemented. | |
Functions used by the persistent I/O system. | |
void | persistentOutput (PersistentOStream &os) const |
Function used to write out object persistently. More... | |
void | persistentInput (PersistentIStream &is, int version) |
Function used to read in object persistently. More... | |
Public Member Functions inherited from Herwig::HwDecayerBase | |
HwDecayerBase () | |
The default constructor. | |
virtual bool | accept (const DecayMode &dm) const |
Check if this decayer can perfom the decay specified by the given decay mode. More... | |
virtual ParticleVector | decay (const DecayMode &dm, const Particle &p) const |
Perform a decay for a given DecayMode and a given Particle instance. More... | |
void | persistentOutput (PersistentOStream &os) const |
Function used to write out object persistently. More... | |
void | persistentInput (PersistentIStream &is, int version) |
Function used to read in object persistently. More... | |
bool | initialize () const |
Access to the initialize variable. | |
bool | databaseOutput () const |
Access the database output variable. | |
virtual POWHEGType | hasPOWHEGCorrection () |
Has a POWHEG style correction. | |
virtual bool | hasMECorrection () |
Has an old fashioned ME correction. | |
virtual void | initializeMECorrection (RealEmissionProcessPtr, double &, double &) |
Initialize the ME correction. | |
virtual RealEmissionProcessPtr | applyHardMatrixElementCorrection (RealEmissionProcessPtr) |
Apply the hard matrix element correction to a given hard process or decay. | |
virtual bool | softMatrixElementVeto (PPtr parent, PPtr progenitor, const bool &fs, const Energy &highestpT, const vector< tcPDPtr > &ids, const double &z, const Energy &scale, const Energy &pT) |
Apply the soft matrix element correction. More... | |
virtual RealEmissionProcessPtr | generateHardest (RealEmissionProcessPtr) |
Apply the POWHEG style correction. | |
Public Member Functions inherited from ThePEG::Decayer | |
Ptr< Amplitude >::pointer | amplitude () const |
virtual bool | needsFullStep () const |
virtual ParticleVector | decay (const DecayMode &dm, const Particle &p, Step &step) const |
virtual double | brat (const DecayMode &dm, const ParticleData &pd, double oldbrat) const |
virtual double | brat (const DecayMode &dm, const Particle &p, double oldbrat) const |
virtual ParticleVector | getChildren (const DecayMode &dm, const Particle &parent) const |
virtual void | finalBoost (const Particle &parent, const ParticleVector &children) const |
virtual void | setScales (const Particle &parent, const ParticleVector &children) const |
void | persistentOutput (PersistentOStream &os) const |
void | persistentInput (PersistentIStream &is, int version) |
virtual bool | needsFullStep () const |
virtual ParticleVector | decay (const DecayMode &dm, const Particle &p, Step &step) const |
virtual double | brat (const DecayMode &dm, const ParticleData &pd, double oldbrat) const |
virtual double | brat (const DecayMode &dm, const Particle &p, double oldbrat) const |
virtual ParticleVector | getChildren (const DecayMode &dm, const Particle &parent) const |
virtual void | finalBoost (const Particle &parent, const ParticleVector &children) const |
virtual void | setScales (const Particle &parent, const ParticleVector &children) const |
void | persistentOutput (PersistentOStream &os) const |
void | persistentInput (PersistentIStream &is, int version) |
Public Member Functions inherited from HandlerBaseT< UseRandom > | |
double | rnd () const |
double | rnd (double xu) const |
double | rnd (double xl, double xu) const |
bool | rndbool () const |
bool | rndbool (double p) const |
bool | rndbool (double p1, double p2) const |
int | rndsign (double p1, double p2, double p3) const |
int | rnd2 (double p0, double p1) const |
int | rnd3 (double p0, double p1, double p2) const |
int | rnd4 (double p0, double p1, double p2, double p3) const |
long | irnd (long xu=2) const |
long | irnd (long xl, long xu) const |
const StandardModelBase & | SM () const |
tSMPtr | standardModel () const |
Public Member Functions inherited from ThePEG::Interfaced | |
virtual bool | defaultInit () |
PPtr | getParticle (PID) const |
PDPtr | getParticleData (PID) const |
bool | used () const |
void | useMe () const |
tEGPtr | generator () const |
void | persistentOutput (PersistentOStream &os) const |
void | persistentInput (PersistentIStream &is, int version) |
PPtr | getParticle (PID) const |
PDPtr | getParticleData (PID) const |
bool | used () const |
void | useMe () const |
tEGPtr | generator () const |
void | persistentOutput (PersistentOStream &os) const |
void | persistentInput (PersistentIStream &is, int version) |
Public Member Functions inherited from ThePEG::InterfacedBase | |
string | fullName () const |
string | name () const |
string | path () const |
string | comment () const |
void | setup (istream &is) |
virtual IBPtr | fullclone () const |
virtual void | debugme () const |
void | update () |
void | init () |
virtual bool | preInitialize () const |
void | initrun () |
void | finish () |
void | touch () |
void | reset () |
void | clear () |
InitState | state () const |
bool | locked () const |
bool | touched () const |
void | persistentOutput (PersistentOStream &os) const |
void | persistentInput (PersistentIStream &is, int version) |
void | update () |
void | init () |
virtual bool | preInitialize () const |
void | initrun () |
void | finish () |
void | touch () |
void | reset () |
void | clear () |
InitState | state () const |
bool | locked () const |
bool | touched () const |
void | persistentOutput (PersistentOStream &os) const |
void | persistentInput (PersistentIStream &is, int version) |
Public Member Functions inherited from ThePEG::Base | |
void | debug () const |
Public Member Functions inherited from ThePEG::Pointer::ReferenceCounted | |
CounterType | referenceCount () const |
Public Member Functions inherited from ThePEG::Named | |
Named (const string &newName=string()) | |
Named (const Named &)=default | |
const string & | name () const |
bool | operator== (const Named &other) const |
bool | operator< (const Named &other) const |
Static Public Member Functions | |
static void | Init () |
Standard Init function used to initialize the interfaces. | |
Static Public Member Functions inherited from Herwig::HwDecayerBase | |
static void | Init () |
The standard Init function used to initialize the interfaces. More... | |
Static Public Member Functions inherited from ThePEG::Decayer | |
static ParticleVector | DecayParticle (tPPtr parent, Step &step, long maxtry=1000) |
static void | Init () |
Static Public Member Functions inherited from ThePEG::HandlerBase | |
static void | Init () |
Static Public Member Functions inherited from ThePEG::Interfaced | |
static void | Init () |
Static Public Member Functions inherited from ThePEG::InterfacedBase | |
static void | Init () |
Static Public Member Functions inherited from ThePEG::Base | |
static void | Init () |
Protected Member Functions | |
ParticleVector | generate (bool inter, bool cc, const unsigned int &imode, const Particle &inpart) const |
Generate the momenta for the decay. More... | |
void | imode (int in) |
Set the mode being use for this decay. | |
void | ME (DecayMEPtr in) const |
Set the helicity matrix element for the decay. | |
void | resetIntermediate (tcPDPtr part, Energy mass, Energy width) |
Reset the properities of all intermediates. More... | |
unsigned int | numberModes () const |
Number of decay modes. | |
tDecayPhaseSpaceModePtr | mode (unsigned int) |
Pointer to a mode. | |
tcDecayPhaseSpaceModePtr | mode (unsigned int) const |
Pointer to a mode. | |
bool | generateIntermediates () const |
Get whether or not the intermediates are included. | |
void | generateIntermediates (bool in) |
Set whether or not the intermediates are included. | |
Energy | initializePhaseSpaceMode (unsigned int imode, bool init, bool onShell=false) const |
Initialize the phase-space mode. More... | |
void | hasOneLoopME (bool in) |
Whether or not the one loop matrix element is implemented. | |
void | hasRealEmissionME (bool in) |
Whether or not the real emission matrix element is implemented. | |
void | epsilonPS (Energy in) |
Set the epsilon parameter. | |
void | clearModes () |
Clear the models. | |
Standard Interfaced functions. | |
virtual void | doinitrun () |
Initialize this object to the begining of the run phase. | |
Protected Member Functions inherited from Herwig::HwDecayerBase | |
void | fixRho (RhoDMatrix &) const |
Set rho to be diagonal if no correlations. | |
virtual void | dofinish () |
Finalize this object. More... | |
Protected Member Functions inherited from ThePEG::Interfaced | |
void | reporeg (IBPtr object, string name) const |
bool | setDefaultReference (PtrT &ptr, string classname, string objectname) |
Interfaced (const string &newName) | |
Interfaced (const Interfaced &i) | |
void | setGenerator (tEGPtr generator) |
Protected Member Functions inherited from ThePEG::InterfacedBase | |
virtual IBPtr | clone () const=0 |
InterfacedBase (string newName) | |
InterfacedBase (const InterfacedBase &i) | |
virtual void | readSetup (istream &is) |
virtual void | doupdate () |
virtual void | doinit () |
virtual IVector | getReferences () |
virtual void | rebind (const TranslationMap &) |
virtual void | readSetup (istream &is) |
virtual void | doupdate () |
virtual void | doinit () |
virtual IVector | getReferences () |
virtual void | rebind (const TranslationMap &) |
Protected Member Functions inherited from ThePEG::Pointer::ReferenceCounted | |
ReferenceCounted (const ReferenceCounted &) | |
ReferenceCounted & | operator= (const ReferenceCounted &) |
ReferenceCounted (const ReferenceCounted &) | |
ReferenceCounted & | operator= (const ReferenceCounted &) |
Protected Member Functions inherited from ThePEG::Named | |
const Named & | operator= (const Named &other) |
const string & | name (const string &newName) |
Private Member Functions | |
DecayIntegrator & | operator= (const DecayIntegrator &)=delete |
Private and non-existent assignment operator. | |
Private Attributes | |
int | _niter |
Number of iterations for th initialization. | |
int | _npoint |
Number of points for initialisation. | |
int | _ntry |
number of attempts to generate the decay | |
vector< DecayPhaseSpaceModePtr > | _modes |
List of the decay modes. | |
bool | _generateinter |
Whether to include the intermediates whne outputing the results. | |
DecayRadiationGeneratorPtr | _photongen |
Pointer to the object generating the QED radiation in the decay. | |
int | _imode |
mode currently being generated | |
DecayMEPtr | _matrixelement |
The helicity matrix element for the current decay. | |
bool | _realME |
Whether or not the real photon emission matrix element exists. | |
bool | _virtualME |
Whether or not the one-loop matrix element exists. | |
Energy | _eps |
Epsilon parameter for phase-space integration. | |
Friends | |
class | DecayPhaseSpaceMode |
and DecayPhaseMode | |
ostream & | operator<< (ostream &, const DecayIntegrator &) |
The output operator is a friend, this is mainly for debugging. | |
Additional Inherited Members | |
Public Attributes inherited from ThePEG::InterfacedBase | |
initializing | |
uninitialized | |
initialized | |
runready | |
Public Attributes inherited from ThePEG::Pointer::ReferenceCounted | |
const unsigned long | uniqueId |
Static Protected Member Functions inherited from ThePEG::Interfaced | |
static void | registerRepository (IBPtr) |
static void | registerRepository (IBPtr, string newName) |
Main class for Decayers implementing multi-channel phase space integration.
This class is designed to be the base class for Herwig decays including the implementation of a multichannel decayer or n-body phase space decays.
The DecayIntegrator
class inherits from ThePEG's Decayer class and makes use of the DecayPhaseSpaceMode
class to specify a number of decay modes.
Additional modes can be added using the addMode method. In practice the phase space channels for a particular mode are usually constructed in the doinit member of a Decayer and then the modes added to the Decayer.
For the majority of the decays currently implemented the phase-space integration has been optimised and the maximum weight set. If the parameters of the decay model are changed the Initialize interface can be used to optimise the integration and calculate the maximum weight.
In classes inheriting from this the me2() member which gives the matrix element squared must be implemented. This should be combined with the setting of the phase space channels, and the setting of which channels to use and their initial weights in the doinit() member. The different decay modes should then be initialized in the initrun() member if needed. The generate member can then be called from the decay() member to generate a phase-space configuration for a decay.
Definition at line 62 of file DecayIntegrator.h.
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inlinevirtual |
Check if this decayer can perfom the decay for a particular mode.
Uses the modeNumber member but can be overridden
parent | The decaying particle |
children | The decay products |
Implements Herwig::HwDecayerBase.
Reimplemented in Herwig::SMTopDecayer, Herwig::ScalarMesonFactorizedDecayer, Herwig::TauDecayer, Herwig::SMHiggsGGHiggsPPDecayer, Herwig::SMHiggsWWDecayer, Herwig::SemiLeptonicScalarDecayer, Herwig::SMHiggsFermionsDecayer, Herwig::BaryonFactorizedDecayer, and Herwig::SemiLeptonicBaryonDecayer.
Definition at line 96 of file DecayIntegrator.h.
void Herwig::DecayIntegrator::addMode | ( | DecayPhaseSpaceModePtr | mode, |
double | maxwgt, | ||
const vector< double > | wgts | ||
) | const |
Add a phase-space mode to the list.
mode | The mode being added. |
maxwgt | The maximum weight for the phase space integration. |
wgts | The weights of the different channels in the multichannel approach. |
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virtual |
Output the setup information for the particle database.
os | The stream to output the information to |
header | Whether or not to output the information for MySQL |
Implements Herwig::HwDecayerBase.
Reimplemented in Herwig::a1ThreePionCLEODecayer, Herwig::a1ThreePionDecayer, Herwig::VectorMeson3PionDecayer, Herwig::SMTopDecayer, Herwig::EtaPiGammaGammaDecayer, Herwig::EtaPiPiGammaDecayer, Herwig::SMWDecayer, Herwig::SMZDecayer, Herwig::PScalarPScalarVectorDecayer, Herwig::PScalarVectorFermionsDecayer, Herwig::VectorMesonPScalarFermionsDecayer, Herwig::OniumToOniumPiPiDecayer, Herwig::TensorMesonVectorVectorDecayer, Herwig::EtaPiPiPiDecayer, Herwig::Baryon1MesonDecayerBase, Herwig::VectorMeson2MesonDecayer, Herwig::VectorMesonVectorVectorDecayer, Herwig::TauDecayer, Herwig::VectorMesonVectorPScalarDecayer, Herwig::TensorMesonVectorPScalarDecayer, Herwig::PScalarVectorVectorDecayer, Herwig::TensorMeson2PScalarDecayer, Herwig::VectorMeson2FermionDecayer, Herwig::SMHiggsWWDecayer, Herwig::a1SimpleDecayer, Herwig::SU3BaryonOctetOctetPhotonDecayer, Herwig::ScalarMesonFactorizedDecayer, Herwig::ScalarVectorVectorDecayer, Herwig::SU3BaryonOctetOctetScalarDecayer, Herwig::SMHiggsGGHiggsPPDecayer, Herwig::ScalarMesonTensorScalarDecayer, Herwig::ScalarScalarScalarDecayer, Herwig::SemiLeptonicScalarDecayer, Herwig::SU3BaryonSingletOctetPhotonDecayer, Herwig::PScalar4FermionsDecayer, Herwig::PVectorMesonVectorPScalarDecayer, Herwig::VectorMesonVectorScalarDecayer, Herwig::SU3BaryonOctetDecupletScalarDecayer, Herwig::SMHiggsFermionsDecayer, Herwig::BaryonFactorizedDecayer, Herwig::PScalarLeptonNeutrinoDecayer, Herwig::SU3BaryonSingletOctetScalarDecayer, Herwig::VectorMesonPVectorPScalarDecayer, Herwig::SU3BaryonDecupletOctetPhotonDecayer, Herwig::DtoKPiPiCLEO, Herwig::SU3BaryonDecupletOctetScalarDecayer, Herwig::DtoKPiPiMarkIII, Herwig::DtoKPiPiE691, Herwig::SemiLeptonicBaryonDecayer, Herwig::RadiativeHeavyBaryonDecayer, Herwig::NonLeptonicHyperonDecayer, Herwig::KornerKramerCharmDecayer, Herwig::NonLeptonicOmegaDecayer, Herwig::RadiativeHyperonDecayer, Herwig::OmegaXiStarPionDecayer, and Herwig::StrongHeavyBaryonDecayer.
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virtual |
For a given decay mode and a given particle instance, perform the decay and return the decay products.
As this is the base class this is not implemented.
Implements Herwig::HwDecayerBase.
Reimplemented in Herwig::SMTopDecayer, Herwig::SMHiggsGGHiggsPPDecayer, Herwig::SMHiggsWWDecayer, Herwig::GeneralTwoBodyDecayer, Herwig::SMHiggsFermionsDecayer, Herwig::GeneralThreeBodyDecayer, and Herwig::GeneralFourBodyDecayer.
int Herwig::DecayIntegrator::findMode | ( | const DecayMode & | dm | ) |
Finds the phase-space mode corresponding to a given decay mode.
dm | The DecayMode |
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protected |
Generate the momenta for the decay.
inter | Generate the intermediates produced in the decay as well as the final particles. |
cc | Is this the mode defined or its charge conjugate. |
imode | The mode being generated. |
inpart | The decaying particle. |
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inline |
Members for the generation of QED radiation in the decays.
Use the DecayRadiationGenerator to generate photons in the decay.
p | The Particle instance being decayed |
children | The decay products |
Definition at line 244 of file DecayIntegrator.h.
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protected |
Initialize the phase-space mode.
imode | The mode |
init | Whether or not to perform the initialization |
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pure virtual |
Return the matrix element squared for a given mode and phase-space channel.
This function is purely virtual and must be implemented in classes inheriting from DecayIntegrator.
ichan | The channel we are calculating the matrix element for. |
part | The decaying Particle. |
decay | The particles produced in the decay. |
opt | Option for the calculation of the matrix element |
Implemented in Herwig::a1ThreePionCLEODecayer, Herwig::a1ThreePionDecayer, Herwig::SMTopDecayer, Herwig::VectorMeson3PionDecayer, Herwig::SMWDecayer, Herwig::SMZDecayer, Herwig::EtaPiGammaGammaDecayer, Herwig::TauDecayer, Herwig::VectorMesonVectorVectorDecayer, Herwig::TensorMesonVectorVectorDecayer, Herwig::EtaPiPiGammaDecayer, Herwig::GeneralTwoBodyDecayer, Herwig::SMHiggsWWDecayer, Herwig::ScalarMesonFactorizedDecayer, Herwig::VectorMeson2MesonDecayer, Herwig::Baryon1MesonDecayerBase, Herwig::PScalarVectorFermionsDecayer, Herwig::VectorMesonPScalarFermionsDecayer, Herwig::VectorMesonVectorPScalarDecayer, Herwig::TensorMesonVectorPScalarDecayer, Herwig::PScalarVectorVectorDecayer, Herwig::TensorMeson2PScalarDecayer, Herwig::VectorMeson2FermionDecayer, Herwig::SemiLeptonicScalarDecayer, Herwig::OniumToOniumPiPiDecayer, Herwig::SemiLeptonicBaryonDecayer, Herwig::EtaPiPiPiDecayer, Herwig::PScalar4FermionsDecayer, Herwig::PVectorMesonVectorPScalarDecayer, Herwig::VectorMesonVectorScalarDecayer, Herwig::SMHiggsFermionsDecayer, Herwig::BaryonFactorizedDecayer, Herwig::PScalarLeptonNeutrinoDecayer, Herwig::PScalarPScalarVectorDecayer, Herwig::ScalarVectorVectorDecayer, Herwig::ScalarMesonTensorScalarDecayer, Herwig::ScalarScalarScalarDecayer, Herwig::VectorMesonPVectorPScalarDecayer, Herwig::GeneralCurrentDecayer, Herwig::DtoKPiPiCLEO, Herwig::a1SimpleDecayer, Herwig::FFSDecayer, Herwig::FFVDecayer, Herwig::SVVDecayer, Herwig::VFFDecayer, Herwig::DtoKPiPiMarkIII, Herwig::FRVDecayer, Herwig::SFFDecayer, Herwig::SSVDecayer, Herwig::TFFDecayer, Herwig::TSSDecayer, Herwig::TVVDecayer, Herwig::VSSDecayer, Herwig::DtoKPiPiE691, Herwig::SSSDecayer, Herwig::VVVDecayer, Herwig::FRSDecayer, Herwig::SRFDecayer, Herwig::SMHiggsGGHiggsPPDecayer, Herwig::VVSDecayer, Herwig::FFVCurrentDecayer, Herwig::StoSFFDecayer, Herwig::FtoFVVDecayer, Herwig::StoFFVDecayer, Herwig::StoFFFFDecayer, Herwig::VtoFFVDecayer, and Herwig::FtoFFFDecayer.
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pure virtual |
Which of the possible decays is required.
cc | Is this mode the charge conjugate |
parent | The decaying particle |
children | The decay products |
Implemented in Herwig::a1ThreePionCLEODecayer, Herwig::VectorMeson3PionDecayer, Herwig::a1ThreePionDecayer, Herwig::SMWDecayer, Herwig::SMTopDecayer, Herwig::SMZDecayer, Herwig::SU3BaryonOctetOctetPhotonDecayer, Herwig::EtaPiGammaGammaDecayer, Herwig::TauDecayer, Herwig::TensorMesonVectorVectorDecayer, Herwig::SU3BaryonOctetOctetScalarDecayer, Herwig::GeneralTwoBodyDecayer, Herwig::SMHiggsWWDecayer, Herwig::EtaPiPiGammaDecayer, Herwig::SU3BaryonSingletOctetPhotonDecayer, Herwig::SU3BaryonOctetDecupletScalarDecayer, Herwig::VectorMeson2MesonDecayer, Herwig::VectorMesonVectorVectorDecayer, Herwig::SMHiggsGGHiggsPPDecayer, Herwig::SU3BaryonSingletOctetScalarDecayer, Herwig::PScalarVectorFermionsDecayer, Herwig::VectorMesonPScalarFermionsDecayer, Herwig::VectorMesonVectorPScalarDecayer, Herwig::PScalarVectorVectorDecayer, Herwig::TensorMesonVectorPScalarDecayer, Herwig::TensorMeson2PScalarDecayer, Herwig::VectorMeson2FermionDecayer, Herwig::SemiLeptonicScalarDecayer, Herwig::OniumToOniumPiPiDecayer, Herwig::EtaPiPiPiDecayer, Herwig::PScalar4FermionsDecayer, Herwig::SU3BaryonDecupletOctetPhotonDecayer, Herwig::ScalarMesonFactorizedDecayer, Herwig::SU3BaryonDecupletOctetScalarDecayer, Herwig::GeneralThreeBodyDecayer, Herwig::PVectorMesonVectorPScalarDecayer, Herwig::VectorMesonVectorScalarDecayer, Herwig::PScalarLeptonNeutrinoDecayer, Herwig::PScalarPScalarVectorDecayer, Herwig::BaryonFactorizedDecayer, Herwig::SemiLeptonicBaryonDecayer, Herwig::ScalarVectorVectorDecayer, Herwig::RadiativeHeavyBaryonDecayer, Herwig::ScalarMesonTensorScalarDecayer, Herwig::ScalarScalarScalarDecayer, Herwig::VectorMesonPVectorPScalarDecayer, Herwig::GeneralCurrentDecayer, Herwig::GeneralFourBodyDecayer, Herwig::DtoKPiPiCLEO, Herwig::a1SimpleDecayer, Herwig::DtoKPiPiMarkIII, Herwig::DtoKPiPiE691, Herwig::NonLeptonicHyperonDecayer, Herwig::SMHiggsFermionsDecayer, Herwig::KornerKramerCharmDecayer, Herwig::NonLeptonicOmegaDecayer, Herwig::RadiativeHyperonDecayer, Herwig::OmegaXiStarPionDecayer, and Herwig::StrongHeavyBaryonDecayer.
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virtual |
The one-loop virtual correction.
imode | The mode required. |
part | The decaying particle. |
products | The decay products including the radiated photon. |
Reimplemented in Herwig::SMZDecayer.
void Herwig::DecayIntegrator::persistentInput | ( | PersistentIStream & | is, |
int | version | ||
) |
Function used to read in object persistently.
is | the persistent input stream read from. |
version | the version number of the object when written. |
void Herwig::DecayIntegrator::persistentOutput | ( | PersistentOStream & | os | ) | const |
Function used to write out object persistently.
os | the persistent output stream written to. |
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virtual |
The real emission matrix element.
imode | The mode required |
part | The decaying particle |
products | The decay products including the radiated photon |
iemitter | The particle which emitted the photon |
ctheta | The cosine of the polar angle between the photon and the emitter |
stheta | The sine of the polar angle between the photon and the emitter |
rot1 | Rotation from rest frame to frame for real emission |
rot2 | Rotation to place emitting particle along z |
Reimplemented in Herwig::SMZDecayer.
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protected |
Reset the properities of all intermediates.
part | The intermediate particle being reset. |
mass | The mass of the particle. |
width | The width of the particle. |
void Herwig::DecayIntegrator::setPartialWidth | ( | const DecayMode & | dm, |
int | imode | ||
) |
Set the code for the partial width.
Finds the partial width in the GenericWidthGenerator class which corresponds to the decay mode.
dm | The DecayMode |
imode | The mode. |
|
virtual |
The differential three body decay rate with one integral performed.
imode | The mode for which the matrix element is needed. |
q2 | The scale, i.e. the mass squared of the decaying particle. |
s | The invariant mass which still needs to be integrate over. |
m1 | The mass of the first outgoing particle. |
m2 | The mass of the second outgoing particle. |
m3 | The mass of the third outgoing particle. |
Reimplemented in Herwig::SMTopDecayer, Herwig::PScalarVectorFermionsDecayer, Herwig::VectorMesonPScalarFermionsDecayer, and Herwig::EtaPiPiPiDecayer.
|
virtual |
The matrix element to be integrated for the three-body decays as a function of the invariant masses of pairs of the outgoing particles.
imode | The mode for which the matrix element is needed. |
q2 | The scale, i.e. the mass squared of the decaying particle. |
s3 | The invariant mass squared of particles 1 and 2, . |
s2 | The invariant mass squared of particles 1 and 3, . |
s1 | The invariant mass squared of particles 2 and 3, . |
m1 | The mass of the first outgoing particle. |
m2 | The mass of the second outgoing particle. |
m3 | The mass of the third outgoing particle. |
Reimplemented in Herwig::a1ThreePionCLEODecayer, Herwig::a1ThreePionDecayer, Herwig::VectorMeson3PionDecayer, Herwig::EtaPiGammaGammaDecayer, Herwig::EtaPiPiGammaDecayer, Herwig::OniumToOniumPiPiDecayer, Herwig::a1SimpleDecayer, and Herwig::GeneralThreeBodyDecayer.
|
virtual |
Method to return an object to calculate the 3 (or higher body) partial width.
dm | The DecayMode |
Reimplemented in Herwig::a1ThreePionCLEODecayer, Herwig::a1ThreePionDecayer, Herwig::VectorMeson3PionDecayer, Herwig::SMTopDecayer, Herwig::EtaPiGammaGammaDecayer, Herwig::EtaPiPiGammaDecayer, Herwig::PScalarVectorFermionsDecayer, Herwig::VectorMesonPScalarFermionsDecayer, Herwig::OniumToOniumPiPiDecayer, Herwig::EtaPiPiPiDecayer, Herwig::a1SimpleDecayer, Herwig::StoSFFDecayer, Herwig::StoFFVDecayer, Herwig::FtoFVVDecayer, Herwig::VtoFFVDecayer, and Herwig::FtoFFFDecayer.
|
inlinevirtual |
Specify the matrix element to be used in the running width calculation.
mecode | The code for the matrix element as described in the GenericWidthGenerator class. |
coupling | The coupling for the matrix element. |
Reimplemented in Herwig::PVectorMesonVectorPScalarDecayer, Herwig::VectorMesonVectorScalarDecayer, Herwig::GeneralTwoBodyDecayer, Herwig::VectorMesonPVectorPScalarDecayer, Herwig::TensorMesonVectorVectorDecayer, Herwig::VectorMeson2MesonDecayer, Herwig::Baryon1MesonDecayerBase, Herwig::VectorMesonVectorPScalarDecayer, Herwig::TensorMesonVectorPScalarDecayer, Herwig::PScalarVectorVectorDecayer, Herwig::TensorMeson2PScalarDecayer, Herwig::VectorMeson2FermionDecayer, Herwig::VectorMesonVectorVectorDecayer, Herwig::PScalarPScalarVectorDecayer, Herwig::ScalarVectorVectorDecayer, Herwig::ScalarMesonTensorScalarDecayer, and Herwig::ScalarScalarScalarDecayer.
Definition at line 158 of file DecayIntegrator.h.