herwig is hosted by Hepforge, IPPP Durham
Herwig 7.3.0
Herwig::ShowerAlphaQED Class Reference

This concrete class provides the definition of the pure virtual function value(scale) for \(\alpha_{\rm QED}\). More...

#include <ShowerAlphaQED.h>

Inheritance diagram for Herwig::ShowerAlphaQED:

Public Member Functions

Standard constructors and destructors.
 ShowerAlphaQED ()
 The default constructor.
 
virtual double value (const Energy2 scale) const
 Methods to return the coupling.
 
virtual double overestimateValue () const
 It returns the overestimiate of the coupling multiplied by the scale factor scaleFactor().
 
virtual double ratio (const Energy2 scale, double factor=1.) const
 Return the ratio of the coupling at the scale to the overestimated value.
 
- Public Member Functions inherited from Herwig::ShowerAlpha
 ShowerAlpha ()
 The default constructor.
 
double scaleFactor () const
 It returns the factor that multiplies the scale argument, \(\mu^2\), of the running coupling.
 
virtual double showerValue (const Energy2 scale) const
 Virtual method that is supposed to return the running alpha value evaluated at the input scale.
 
virtual double showerOverestimateValue () const
 Virtual method, which should be overridden in a derived class to provide an overestimate approximation of the alpha value.
 
virtual double showerRatio (const Energy2 scale, double factor=1.) const
 Virtual method which returns the ratio of the running alpha value at the input scale to the overestimated value.
 
virtual void initialize ()
 Initialize this coupling.
 
void persistentOutput (PersistentOStream &os) const
 Function used to write out object persistently.
 
void persistentInput (PersistentIStream &is, int version)
 Function used to read in object persistently.
 
- 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
 
- Public Member Functions inherited from ThePEG::InterfacedBase
string fullName () const
 
string name () const
 
string path () const
 
string comment () const
 
void setup (istream &is)
 
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
 
virtual IBPtr fullclone () const
 
void persistentOutput (PersistentOStream &os) const
 
void persistentInput (PersistentIStream &is, int version)
 
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
 
virtual IBPtr fullclone () const
 
- Public Member Functions inherited from ThePEG::Base
void debug () const
 
virtual void debugme () 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
 

Clone Methods.

static ClassDescription< ShowerAlphaQEDinitShowerAlphaQED
 The static object used to initialize the description of this class.
 
double _alpha
 The value of the coupling, as we are producing real photons this is always \(\alpha(q^2=0)\).
 
unsigned int couplingSource_
 Source of coupling value.
 
virtual IBPtr clone () const
 Make a simple clone of this object.
 
virtual IBPtr fullclone () const
 Make a clone of this object, possibly modifying the cloned object to make it sane.
 
virtual void doinit ()
 Initialize this object after the setup phase before saving an EventGenerator to disk.
 
ShowerAlphaQEDoperator= (const ShowerAlphaQED &)=delete
 The assignment operator is private and must never be called.
 

Functions used by the persistent I/O system.

void persistentOutput (PersistentOStream &os) const
 Function used to write out object persistently.
 
void persistentInput (PersistentIStream &is, int version)
 Function used to read in object persistently.
 
static void Init ()
 The standard Init function used to initialize the interfaces.
 

Additional Inherited Members

- Public Types inherited from ThePEG::InterfacedBase
enum  InitState
 
- Public Types inherited from ThePEG::Pointer::ReferenceCounted
typedef unsigned int CounterType
 
- Static Public Member Functions inherited from Herwig::ShowerAlpha
static void Init ()
 The standard Init function used to initialize the interfaces.
 
- 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 ()
 
- Public Attributes inherited from ThePEG::InterfacedBase
 initializing
 
 uninitialized
 
 initialized
 
 runready
 
- Public Attributes inherited from ThePEG::Pointer::ReferenceCounted
const unsigned long uniqueId
 
- 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 void readSetup (istream &is)
 
virtual void doupdate ()
 
virtual void doinit ()
 
virtual void doinitrun ()
 
virtual void dofinish ()
 
virtual IVector getReferences ()
 
virtual void rebind (const TranslationMap &)
 
virtual IBPtr clone () const=0
 
 InterfacedBase (string newName)
 
 InterfacedBase (const InterfacedBase &i)
 
virtual void readSetup (istream &is)
 
virtual void doupdate ()
 
virtual void doinit ()
 
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 &)
 
- Protected Member Functions inherited from ThePEG::Named
const Namedoperator= (const Named &other)
 
const string & name (const string &newName)
 
- Static Protected Member Functions inherited from ThePEG::Interfaced
static void registerRepository (IBPtr)
 
static void registerRepository (IBPtr, string newName)
 

Detailed Description

This concrete class provides the definition of the pure virtual function value(scale) for \(\alpha_{\rm QED}\).

N.B. as we always use \(\alpha(0)\) for the radiation of photons this class is very simple.

See also
ShowerAlpha
ShowerAlphaQCD
The interfaces defined for ShowerAlphaQED.

Definition at line 34 of file ShowerAlphaQED.h.

Constructor & Destructor Documentation

◆ ShowerAlphaQED()

Herwig::ShowerAlphaQED::ShowerAlphaQED ( )
inline

The default constructor.

Definition at line 43 of file ShowerAlphaQED.h.

Member Function Documentation

◆ clone()

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

Make a simple clone of this object.

Returns
a pointer to the new object.

Implements ThePEG::InterfacedBase.

Definition at line 110 of file ShowerAlphaQED.h.

◆ doinit()

virtual void Herwig::ShowerAlphaQED::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 ThePEG::InterfacedBase.

◆ fullclone()

virtual IBPtr Herwig::ShowerAlphaQED::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 ThePEG::InterfacedBase.

Definition at line 116 of file ShowerAlphaQED.h.

◆ Init()

static void Herwig::ShowerAlphaQED::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.

◆ operator=()

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

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

◆ overestimateValue()

virtual double Herwig::ShowerAlphaQED::overestimateValue ( ) const
virtual

It returns the overestimiate of the coupling multiplied by the scale factor scaleFactor().

Implements Herwig::ShowerAlpha.

◆ persistentInput()

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

Function used to write out object persistently.

Parameters
osthe persistent output stream written to.

◆ ratio()

virtual double Herwig::ShowerAlphaQED::ratio ( const Energy2  scale,
double  factor = 1. 
) const
virtual

Return the ratio of the coupling at the scale to the overestimated value.

Implements Herwig::ShowerAlpha.

◆ value()

virtual double Herwig::ShowerAlphaQED::value ( const Energy2  scale) const
virtual

Methods to return the coupling.

The methods are equivalent to the QCD ones and are necessary to make use of the virtuality of ShowerAlpha at other places. It returns the running coupling value evaluated at the input scale multiplied by the scale factor scaleFactor().

Parameters
scaleThe scale
Returns
The coupling

Implements Herwig::ShowerAlpha.

Member Data Documentation

◆ _alpha

double Herwig::ShowerAlphaQED::_alpha
private

The value of the coupling, as we are producing real photons this is always \(\alpha(q^2=0)\).

Definition at line 148 of file ShowerAlphaQED.h.

◆ couplingSource_

unsigned int Herwig::ShowerAlphaQED::couplingSource_
private

Source of coupling value.

Definition at line 153 of file ShowerAlphaQED.h.

◆ initShowerAlphaQED

ClassDescription<ShowerAlphaQED> Herwig::ShowerAlphaQED::initShowerAlphaQED
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 134 of file ShowerAlphaQED.h.


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