ThePEG::MEee2gZ2qq Class Reference

The MEee2gZ2qq class implements the $e^+e^-\rightarrow\gamma/Z^0\rightarrow q\bar{q}$ matrix element. More...

#include <MEee2gZ2qq.h>

Inheritance diagram for ThePEG::MEee2gZ2qq:

List of all members.

Public Member Functions

Standard constructors and destructors.

MEee2gZ2qq ()

Default constructor.

Virtual functions required by the MEBase class.

virtual unsigned int orderInAlphaS () const

Return the order in $\alpha_S$ in which this matrix element is given.

virtual unsigned int orderInAlphaEW () const

Return the order in $\alpha_{EM}$ in which this matrix element is given.

virtual double me2 () const

The matrix element for the kinematical configuration previously provided by the last call to setKinematics(), suitably scaled by sHat() to give a dimension-less number.

virtual void getDiagrams () const

Add all possible diagrams with the add() function.

virtual Selector< const
ColourLines * > colourGeometries (tcDiagPtr diag) const

Return a Selector with possible colour geometries for the selected diagram weighted by their relative probabilities.

virtual Selector< DiagramIndex > diagrams (const DiagramVector &dv) const

Get diagram selector.

virtual Energy2 scale () const

Return the scale associated with the last set phase space point.

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 Public Member Functions

static void Init ()

Standard Init function used to initialize the interface.

Protected Member Functions

Clone Methods.

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.

Standard Interfaced functions.

virtual void doinit ()

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

Protected Attributes

vector< double > coefs

Constants for the different terms set from the StandardModel in the init() function.

Energy2 mZ2

The squared mass of the Z0.

Energy2 GZ2

The squared width of the Z0.

double lastCont

The last continuum term to be used to select primary diagram.

double lastBW

The last Breit-Wigner term to be used to select primary diagram.

Private Member Functions

MEee2gZ2qq & operator= (const MEee2gZ2qq &)

Private and non-existent assignment operator.

Static Private Attributes

static ClassDescription
< MEee2gZ2qq > initMEee2gZ2qq

Describe a concrete class with persistent data.

Detailed Description

The MEee2gZ2qq class implements the $e^+e^-\rightarrow\gamma/Z^0\rightarrow q\bar{q}$ matrix element.

Both the continuum and $Z^0$ pole term as well as the interference term is included. Although not a strict QCD matrix element the class inherits from ME2to2QCD, mainly to inherit the parameter for the number of active quark flavours.

See also:: The interfaces defined for MEee2gZ2qq.
ME2to2QCD

Definition at line 29 of file MEee2gZ2qq.h.

Member Function Documentation

virtual unsigned int ThePEG::MEee2gZ2qq::orderInAlphaS ( ) const [virtual]

Return the order in $\alpha_S$ in which this matrix element is given.

Returns .

Reimplemented from ThePEG::ME2to2QCD.

virtual unsigned int ThePEG::MEee2gZ2qq::orderInAlphaEW ( ) const [virtual]

Return the order in $\alpha_{EM}$ in which this matrix element is given.

Returns 2.

Reimplemented from ThePEG::ME2to2QCD.

virtual double ThePEG::MEee2gZ2qq::me2 ( ) const [virtual]

The matrix element for the kinematical configuration previously provided by the last call to setKinematics(), suitably scaled by sHat() to give a dimension-less number.

Returns:: the matrix element scaled with sHat() to give a dimensionless number.

Implements ThePEG::MEBase.

virtual Selector<const ColourLines *> ThePEG::MEee2gZ2qq::colourGeometries ( tcDiagPtr diag ) const [virtual]

Return a Selector with possible colour geometries for the selected diagram weighted by their relative probabilities.

Parameters:

diag

the diagram chosen.

Returns:: the possible colour geometries weighted by their relative probabilities.

Implements ThePEG::MEBase.

virtual Selector<DiagramIndex> ThePEG::MEee2gZ2qq::diagrams ( const DiagramVector & dv ) const [virtual]

Get diagram selector.

With the information previously supplied with the setKinematics method, a derived class may optionally override this method to weight the given diagrams with their (although certainly not physical) relative probabilities.

Parameters:

dv

the diagrams to be weighted.

Returns:: a Selector relating the given diagrams to their weights.

Reimplemented from ThePEG::MEBase.

void ThePEG::MEee2gZ2qq::persistentOutput ( PersistentOStream & os ) const

Function used to write out object persistently.

Parameters:

os

the persistent output stream written to.

Reimplemented from ThePEG::ME2to2QCD.

void ThePEG::MEee2gZ2qq::persistentInput	(	PersistentIStream &	is,
		int	version
	)

Function used to read in object persistently.

Parameters:

	is	the persistent input stream read from.
	version	the version number of the object when written.

Reimplemented from ThePEG::ME2to2QCD.

virtual IBPtr ThePEG::MEee2gZ2qq::clone ( ) const [protected, virtual]

Make a simple clone of this object.

Returns:: a pointer to the new object.

Implements ThePEG::InterfacedBase.

virtual IBPtr ThePEG::MEee2gZ2qq::fullclone ( ) const [protected, virtual]

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.

virtual void ThePEG::MEee2gZ2qq::doinit ( ) [protected, virtual]

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

Exceptions:

InitException

if object could not be initialized properly.

Reimplemented from ThePEG::InterfacedBase.

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

MEee2gZ2qq.h


Public Member Functions
Standard constructors and destructors.
	MEee2gZ2qq ()
	Default constructor.
Virtual functions required by the MEBase class.
virtual unsigned int	orderInAlphaS () const
	Return the order in $\alpha_S$ in which this matrix element is given.
virtual unsigned int	orderInAlphaEW () const
	Return the order in $\alpha_{EM}$ in which this matrix element is given.
virtual double	me2 () const
	The matrix element for the kinematical configuration previously provided by the last call to setKinematics(), suitably scaled by sHat() to give a dimension-less number.
virtual void	getDiagrams () const
	Add all possible diagrams with the add() function.
virtual Selector< const ColourLines * >	colourGeometries (tcDiagPtr diag) const
	Return a Selector with possible colour geometries for the selected diagram weighted by their relative probabilities.
virtual Selector< DiagramIndex >	diagrams (const DiagramVector &dv) const
	Get diagram selector.
virtual Energy2	scale () const
	Return the scale associated with the last set phase space point.
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 Public Member Functions
static void	Init ()
	Standard Init function used to initialize the interface.
Protected Member Functions
Clone Methods.
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.
Standard Interfaced functions.
virtual void	doinit ()
	Initialize this object after the setup phase before saving an EventGenerator to disk.
Protected Attributes
vector< double >	coefs
	Constants for the different terms set from the StandardModel in the init() function.
Energy2	mZ2
	The squared mass of the Z0.
Energy2	GZ2
	The squared width of the Z0.
double	lastCont
	The last continuum term to be used to select primary diagram.
double	lastBW
	The last Breit-Wigner term to be used to select primary diagram.
Private Member Functions
MEee2gZ2qq &	operator= (const MEee2gZ2qq &)
	Private and non-existent assignment operator.
Static Private Attributes
static ClassDescription < MEee2gZ2qq >	initMEee2gZ2qq
	Describe a concrete class with persistent data.