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Herwig  7.1.5
Herwig::SMWFermionsPOWHEGDecayer Class Reference

Here is the documentation of the SMWFermionsPOWHEGDecayer class. More...

#include <SMWFermionsPOWHEGDecayer.h>

Inheritance diagram for Herwig::SMWFermionsPOWHEGDecayer:

Public Member Functions

 SMWFermionsPOWHEGDecayer ()
 The default constructor.
 
virtual double me2 (const int ichan, const Particle &part, const ParticleVector &decay, MEOption meopt) const
 Return the matrix element squared for a given mode and phase-space channel. More...
 
virtual POWHEGType hasPOWHEGCorrection ()
 Virtual members to be overridden by inheriting classes which implement hard corrections. More...
 
virtual RealEmissionProcessPtr generateHardest (RealEmissionProcessPtr)
 Apply the POWHEG style correction.
 
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::SMWDecayer
 SMWDecayer ()
 Default constructor.
 
virtual int modeNumber (bool &cc, tcPDPtr parent, const tPDVector &children) const
 Which of the possible decays is required. More...
 
virtual void dataBaseOutput (ofstream &os, bool header) const
 Output the setup information for the particle database. More...
 
virtual bool hasMECorrection ()
 Virtual members to be overridden by inheriting classes which implement hard corrections. More...
 
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 (ShowerProgenitorPtr initial, ShowerParticlePtr parent, Branching br)
 Apply the soft matrix element correction. 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...
 
- Public Member Functions inherited from Herwig::DecayIntegrator
 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...
 
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...
 
DecayMEPtr ME () const
 The helicity amplitude matrix element for spin correlations.
 
virtual bool twoBodyMEcode (const DecayMode &, int &mecode, double &coupling) const
 Specify the $1\to2$ 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...
 
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.
 
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.
 
- 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 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())
 
const string & name () const
 
bool operator== (const Named &other) const
 
bool operator< (const Named &other) const
 

Static Public Member Functions

static void Init ()
 The standard Init function used to initialize the interfaces. More...
 
- Static Public Member Functions inherited from Herwig::SMWDecayer
static void Init ()
 Standard Init function used to initialize the interfaces.
 
- Static Public Member Functions inherited from Herwig::DecayIntegrator
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

Clone Methods.
virtual IBPtr clone () const
 Make a simple clone of this object. More...
 
virtual IBPtr fullclone () const
 Make a clone of this object, possibly modifying the cloned object to make it sane. More...
 
Standard Interfaced functions.
virtual void doinit ()
 Initialize this object after the setup phase before saving an EventGenerator to disk. More...
 
- Protected Member Functions inherited from Herwig::SMWDecayer
vector< Lorentz5Momentum > applyHard (const ParticleVector &p)
 Apply the hard matrix element.
 
double getHard (double &, double &)
 Get the weight for hard emission.
 
void setRho (double)
 Set the $\rho$ parameter.
 
void setKtildeSymm ()
 Set the $\tilde{\kappa}$ parameters symmetrically.
 
void setKtilde2 ()
 Set second $\tilde{\kappa}$, given the first.
 
void getXXbar (double kt, double z, double &x, double &xbar)
 Calculate $x_{q},x_{\bar{q}}$ from $\tilde{\kappa},z$. More...
 
double u (double)
 ????
 
virtual void doinitrun ()
 Initialize this object. More...
 
double getZfromX (double, double)
 Translate the variables from $x_q,x_{\bar{q}}$ to $\tilde{\kappa},z$. More...
 
double getKfromX (double, double)
 Calculate $\tilde{\kappa}$.
 
double qWeight (double x, double xbar)
 Soft weight. More...
 
double qbarWeight (double x, double xbar)
 Soft antiquark weight calculated from $x_{q},x_{\bar{q}}$. More...
 
double qWeightX (Energy qtilde, double z)
 Soft quark weight calculated from $\tilde{q},z$. More...
 
double qbarWeightX (Energy qtilde, double z)
 Soft antiquark weight calculated from $\tilde{q},z$. More...
 
double MEV (double, double)
 Vector and axial vector parts of the matrix element. More...
 
double MEA (double, double)
 Axial vector part of the matrix element.
 
double PS (double x1, double x2)
 The matrix element, given $x_1$, $x_2$. More...
 
ShowerAlphaPtr alphaS () const
 Access to the strong coupling.
 
- Protected Member Functions inherited from Herwig::DecayIntegrator
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.
 
- Protected Member Functions inherited from Herwig::HwDecayerBase
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
 InterfacedBase (string newName)
 
 InterfacedBase (const InterfacedBase &i)
 
virtual void readSetup (istream &is)
 
virtual void doupdate ()
 
virtual IVector getReferences ()
 
virtual void rebind (const TranslationMap &)
 
virtual void readSetup (istream &is)
 
virtual void doupdate ()
 
virtual IVector getReferences ()
 
virtual void rebind (const TranslationMap &)
 
- Protected Member Functions inherited from ThePEG::Pointer::ReferenceCounted
 ReferenceCounted (const ReferenceCounted &)
 
ReferenceCountedoperator= (const ReferenceCounted &)
 
 ReferenceCounted (const ReferenceCounted &)
 
ReferenceCountedoperator= (const ReferenceCounted &)
 
- Protected Member Functions inherited from ThePEG::Named
const Namedoperator= (const Named &other)
 
const string & name (const string &newName)
 

Private Member Functions

SMWFermionsPOWHEGDecayeroperator= (const SMWFermionsPOWHEGDecayer &)=delete
 The assignment operator is private and must never be called. More...
 
AbstractFFVVertexPtr FFWVertex () const
 Pointer to the fermion-antifermion W vertex.
 
AbstractFFVVertexPtr FFGVertex () const
 Pointer to the fermion-antifermion G vertex.
 
double calculateRealEmission (double x1, double x2, vector< PPtr > hardProcess, double phi, double muj, double muk, int iemit, bool subtract) const
 Real emission term, for use in generating the hardest emission.
 
bool checkZMomenta (double x1, double x2, double x3, double y, Energy pT, double muj, double muk) const
 Check the sign of the momentum in the $z$-direction is correct.
 
InvEnergy calculateJacobian (double x1, double x2, Energy pT, double muj, double muk) const
 Calculate the Jacobian.
 
double meRatio (vector< cPDPtr > partons, vector< Lorentz5Momentum > momenta, unsigned int iemitter, bool subtract) const
 Calculate the ratio between NLO & LO ME.
 
double loME (const vector< cPDPtr > &partons, const vector< Lorentz5Momentum > &momenta) const
 Calculate the LO ME.
 
InvEnergy2 realME (const vector< cPDPtr > &partons, const vector< Lorentz5Momentum > &momenta) const
 Calculate the NLO real emission piece of ME.
 
bool getEvent (vector< PPtr > hardProcess)
 Generate a real emission event.
 

Private Attributes

AbstractFFVVertexPtr FFWVertex_
 Pointer to the fermion-antifermion W vertex.
 
AbstractFFVVertexPtr FFGVertex_
 Pointer to the fermion-antifermion G vertex.
 
double CF_
 The colour factor.
 
Energy mW_
 The W mass.
 
double mu_
 
double mu1_
 The reduced mass of particle 1.
 
double mu12_
 The reduced mass of particle 1 squared.
 
double mu2_
 The reduceed mass of particle 2.
 
double mu22_
 The reduceed mass of particle 2 squared.
 
double aS_
 The strong coupling.
 
Energy2 scale_
 The scale.
 
tcPDPtr gluon_
 Stuff for the POWHEG correction. More...
 
Energy pTmin_
 The cut off on pt, assuming massless quarks.
 
Energy pT_
 
vector< tcPDPtrpartons_
 The ParticleData objects for the fermions.
 
vector< Lorentz5Momentum > quark_
 The fermion momenta.
 
Lorentz5Momentum gauge_
 The momentum of the radiated gauge boson.
 
PPtr wboson_
 The W boson.
 
Energy2 mw2_
 W mass squared.
 

Static Private Attributes

static ClassDescription< SMWFermionsPOWHEGDecayerinitSMWFermionsPOWHEGDecayer
 The static object used to initialize the description of this class. More...
 

Additional Inherited Members

- Public Types inherited from Herwig::DecayIntegrator
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 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)
 

Detailed Description

Here is the documentation of the SMWFermionsPOWHEGDecayer class.

See also
The interfaces defined for SMWFermionsPOWHEGDecayer.

Definition at line 21 of file SMWFermionsPOWHEGDecayer.h.

Member Function Documentation

◆ clone()

virtual IBPtr Herwig::SMWFermionsPOWHEGDecayer::clone ( ) const
protectedvirtual

Make a simple clone of this object.

Returns
a pointer to the new object.

Reimplemented from Herwig::SMWDecayer.

◆ doinit()

virtual void Herwig::SMWFermionsPOWHEGDecayer::doinit ( )
protectedvirtual

Initialize this object after the setup phase before saving an EventGenerator to disk.

Exceptions
InitExceptionif object could not be initialized properly.

Reimplemented from Herwig::SMWDecayer.

◆ fullclone()

virtual IBPtr Herwig::SMWFermionsPOWHEGDecayer::fullclone ( ) const
protectedvirtual

Make a clone of this object, possibly modifying the cloned object to make it sane.

Returns
a pointer to the new object.

Reimplemented from Herwig::SMWDecayer.

◆ hasPOWHEGCorrection()

virtual POWHEGType Herwig::SMWFermionsPOWHEGDecayer::hasPOWHEGCorrection ( )
inlinevirtual

Virtual members to be overridden by inheriting classes which implement hard corrections.

Has a POWHEG style correction

Reimplemented from Herwig::HwDecayerBase.

Definition at line 38 of file SMWFermionsPOWHEGDecayer.h.

◆ Init()

static void Herwig::SMWFermionsPOWHEGDecayer::Init ( )
static

The standard Init function used to initialize the interfaces.

Called exactly once for each class by the class description system before the main function starts or when this class is dynamically loaded.

◆ me2()

virtual double Herwig::SMWFermionsPOWHEGDecayer::me2 ( const int  ichan,
const Particle part,
const ParticleVector decay,
MEOption  meopt 
) const
virtual

Return the matrix element squared for a given mode and phase-space channel.

Parameters
ichanThe channel we are calculating the matrix element for.
partThe decaying Particle.
decayThe particles produced in the decay.
meoptOption for the calculation of the matrix element
Returns
The matrix element squared for the phase-space configuration.

Reimplemented from Herwig::SMWDecayer.

◆ operator=()

SMWFermionsPOWHEGDecayer& Herwig::SMWFermionsPOWHEGDecayer::operator= ( const SMWFermionsPOWHEGDecayer )
privatedelete

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

◆ persistentInput()

void Herwig::SMWFermionsPOWHEGDecayer::persistentInput ( PersistentIStream is,
int  version 
)

Function used to read in object persistently.

Parameters
isthe persistent input stream read from.
versionthe version number of the object when written.

◆ persistentOutput()

void Herwig::SMWFermionsPOWHEGDecayer::persistentOutput ( PersistentOStream os) const

Function used to write out object persistently.

Parameters
osthe persistent output stream written to.

Member Data Documentation

◆ gluon_

tcPDPtr Herwig::SMWFermionsPOWHEGDecayer::gluon_
private

Stuff for the POWHEG correction.

ParticleData object for the gluon

Definition at line 235 of file SMWFermionsPOWHEGDecayer.h.

◆ initSMWFermionsPOWHEGDecayer

ClassDescription<SMWFermionsPOWHEGDecayer> Herwig::SMWFermionsPOWHEGDecayer::initSMWFermionsPOWHEGDecayer
staticprivate

The static object used to initialize the description of this class.

Indicates that this is a concrete class with persistent data.

Definition at line 111 of file SMWFermionsPOWHEGDecayer.h.


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