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Herwig  7.2.1
Herwig::CMWHalfHalfOneSplitFn Class Reference

This class provides the concrete implementation of the CMW enhanced expressions for the splitting function for $\frac12\to q\frac12 1$. More...

#include <CMWHalfHalfOneSplitFn.h>

Inheritance diagram for Herwig::CMWHalfHalfOneSplitFn:

Public Member Functions

virtual double P (const double z, const Energy2 t, const IdList &ids, const bool mass, const RhoDMatrix &rho) const
 Methods to return the splitting function. More...
 
virtual double ratioP (const double z, const Energy2 t, const IdList &ids, const bool mass, const RhoDMatrix &rho) const
 Very similar to HalfHalfOneSplitFn. More...
 
double Kg (Energy2) const
 Return the correction term from: Nucl.Phys. More...
 
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::HalfHalfOneSplitFn
virtual bool accept (const IdList &ids) const
 Concrete implementation of the method to determine whether this splitting function can be used for a given set of particles. More...
 
virtual vector< pair< int, Complex > > generatePhiForward (const double z, const Energy2 t, const IdList &ids, const RhoDMatrix &)
 Method to calculate the azimuthal angle. More...
 
virtual vector< pair< int, Complex > > generatePhiBackward (const double z, const Energy2 t, const IdList &ids, const RhoDMatrix &)
 Method to calculate the azimuthal angle for backward evolution. More...
 
virtual DecayMEPtr matrixElement (const double z, const Energy2 t, const IdList &ids, const double phi, bool timeLike)
 Calculate the matrix element for the splitting. More...
 
virtual double overestimateP (const double z, const IdList &ids) const
 The concrete implementation of the overestimate of the splitting function, $P_{\rm over}$. More...
 
virtual double integOverP (const double z, const IdList &ids, unsigned int PDFfactor=0) const
 The concrete implementation of the indefinite integral of the overestimated splitting function, $P_{\rm over}$. More...
 
virtual double invIntegOverP (const double r, const IdList &ids, unsigned int PDFfactor=0) const
 The concrete implementation of the inverse of the indefinite integral. More...
 
- Public Member Functions inherited from Herwig::SplittingFunction
 SplittingFunction ()
 The default constructor. More...
 
virtual bool checkColours (const IdList &ids) const
 Method to check the colours are correct.
 
virtual void colourConnection (tShowerParticlePtr parent, tShowerParticlePtr first, tShowerParticlePtr second, ShowerPartnerType partnerType, const bool back) const
 Purely virtual method which should make the proper colour connection between the emitting parent and the branching products. More...
 
bool angularOrdered () const
 Whether or not the interaction is angular ordered.
 
bool pTScale () const
 Scale choice.
 
ShowerInteraction interactionType () const
 Methods to return the interaction type and order for the splitting function. More...
 
ColourStructure colourStructure () const
 Return the colour structure.
 
double colourFactor (const IdList &ids) const
 Return the colour factor.
 
void evaluateFinalStateScales (ShowerPartnerType type, Energy scale, double z, tShowerParticlePtr parent, tShowerParticlePtr first, tShowerParticlePtr second)
 Functions to state scales after branching happens. More...
 
void evaluateInitialStateScales (ShowerPartnerType type, Energy scale, double z, tShowerParticlePtr parent, tShowerParticlePtr first, tShowerParticlePtr second)
 Sort out scales for initial-state emission.
 
void evaluateDecayScales (ShowerPartnerType type, Energy scale, double z, tShowerParticlePtr parent, tShowerParticlePtr first, tShowerParticlePtr second)
 Sort out scales for decay emission.
 
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 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())
 
 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 ()
 The standard Init function used to initialize the interfaces. More...
 
- Static Public Member Functions inherited from Herwig::HalfHalfOneSplitFn
static void Init ()
 The standard Init function used to initialize the interfaces. More...
 
- Static Public Member Functions inherited from Herwig::SplittingFunction
static void Init ()
 The standard Init function used to initialize the interfaces. More...
 
- 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

Standard Interfaced functions.
virtual void doinit ()
 Initialize this object after the setup phase before saving an EventGenerator to disk. More...
 
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...
 
Clone Methods.
- Protected Member Functions inherited from Herwig::SplittingFunction
void colourFactor (double in)
 Set the colour factor.
 
- 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 void doinitrun ()
 
virtual void dofinish ()
 
virtual IVector getReferences ()
 
virtual void rebind (const TranslationMap &)
 
virtual void readSetup (istream &is)
 
virtual void doupdate ()
 
virtual void doinitrun ()
 
virtual void dofinish ()
 
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

CMWHalfHalfOneSplitFnoperator= (const CMWHalfHalfOneSplitFn &)=delete
 The assignment operator is private and must never be called. More...
 

Private Attributes

ShowerAlphaPtr alpha_
 
bool isIS_ =false
 

Additional Inherited Members

- 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

This class provides the concrete implementation of the CMW enhanced expressions for the splitting function for $\frac12\to q\frac12 1$.

The kernel uses the same overestimate as the corresponding HalfHalfOneSplitFn and thus only needs to implement the spitting function and ratio to the overestimate.

TODO: For a more efficient sampling one needs can rewrite the overestimation to contain the alpha_max*Kgmax factors.

See also
The interfaces defined for CMWHalfHalfOneSplitFn.

Definition at line 39 of file CMWHalfHalfOneSplitFn.h.

Member Function Documentation

◆ clone()

virtual IBPtr Herwig::CMWHalfHalfOneSplitFn::clone ( ) const
inlineprotectedvirtual

Make a simple clone of this object.

Returns
a pointer to the new object.

Reimplemented from Herwig::HalfHalfOneSplitFn.

Definition at line 136 of file CMWHalfHalfOneSplitFn.h.

◆ doinit()

virtual void Herwig::CMWHalfHalfOneSplitFn::doinit ( )
inlineprotectedvirtual

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

Exceptions
InitExceptionif object could not be initialized properly.

Reimplemented from Herwig::SplittingFunction.

Definition at line 114 of file CMWHalfHalfOneSplitFn.h.

References Herwig::SplittingFunction::doinit().

◆ fullclone()

virtual IBPtr Herwig::CMWHalfHalfOneSplitFn::fullclone ( ) const
inlineprotectedvirtual

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::HalfHalfOneSplitFn.

Definition at line 142 of file CMWHalfHalfOneSplitFn.h.

◆ Init()

static void Herwig::CMWHalfHalfOneSplitFn::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.

◆ Kg()

double Herwig::CMWHalfHalfOneSplitFn::Kg ( Energy2  ) const
inline

Return the correction term from: Nucl.Phys.

B349 (1991) 635-654

Definition at line 70 of file CMWHalfHalfOneSplitFn.h.

References sqr().

◆ operator=()

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

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

◆ P()

virtual double Herwig::CMWHalfHalfOneSplitFn::P ( const double  z,
const Energy2  t,
const IdList ids,
const bool  mass,
const RhoDMatrix rho 
) const
virtual

Methods to return the splitting function.

Very similar to HalfHalfOneSplitFn. Here the kernel only contains the soft part multiplied by the alphas/2pi * Kg from Nucl.Phys. B349 (1991) 635-654

Reimplemented from Herwig::HalfHalfOneSplitFn.

◆ persistentInput()

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

Function used to write out object persistently.

Parameters
osthe persistent output stream written to.

◆ ratioP()

virtual double Herwig::CMWHalfHalfOneSplitFn::ratioP ( const double  z,
const Energy2  t,
const IdList ids,
const bool  mass,
const RhoDMatrix rho 
) const
virtual

Very similar to HalfHalfOneSplitFn.

Since we use only the 1/1-z part for overestimating the kernel in the first place we can keep the same overestimation related functions for the CMW kernels.

Reimplemented from Herwig::HalfHalfOneSplitFn.


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