ThePEG::ME2to2QCD Class Reference

The ME2to2QCD class inherits from the ME2to2Base class and can be used as a sub class for all QCD 2 $\rightarrow$ 2 processes. More...

#include <ME2to2QCD.h>

Inheritance diagram for ThePEG::ME2to2QCD:

List of all members.

Public Member Functions

Standard constructors and destructors.

ME2to2QCD ()

Default constructor.

virtual ~ME2to2QCD ()

Destructor.

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.

double comfac () const

The common prefactor for all 2 $\rightarrow$ 2 QCD sub-processes ie.

int maxFlavour () const

Return the heaviest flavour allowed for this matrix element.

double Kfac () const

K-factor for artificially boosting the cross-section.

double KfacA () const

K-factor for artificially boosting colour-annihilation diagrams.

bool interference () const

Return true if interference terms should be used.

bool isQuark (const ParticleData &p) const

Return true if argument is a quark.

tcPDPtr quark (int i) const

Return the quark with flavour i (or gluon if i = 0);.

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 interfaces.

Private Member Functions

ME2to2QCD & operator= (const ME2to2QCD &)

Private and non-existent assignment operator.

Private Attributes

int theMaxFlavour

The heaviest flavour allowed for incoming and outgoing partons.

double theKfac

Overall K-factor used to boost this cross-section.

double theKfacA

Overall K-factors used to boost the colour annihilation diagram in the cross-section.

bool useInterference

Flag so tell whether interference should be used or not.

Static Private Attributes

static
AbstractClassDescription
< ME2to2QCD > initME2to2QCD

Describe an abstract base class with persistent data.

Detailed Description

The ME2to2QCD class inherits from the ME2to2Base class and can be used as a sub class for all QCD 2 $\rightarrow$ 2 processes.

It implements some common functions such as common pre-factors, maximum number of flavours, treatment of interference terms and possibility to enhance certain terms.

See also:: The interfaces defined for ME2to2QCD.
ME2to2Base

Definition at line 28 of file ME2to2QCD.h.

Member Function Documentation

virtual unsigned int ThePEG::ME2to2QCD::orderInAlphaS ( ) const [virtual]

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

Returns 2.

Implements ThePEG::MEBase.

Reimplemented in ThePEG::MEee2gZ2qq, and ThePEG::MENCDIS.

virtual unsigned int ThePEG::ME2to2QCD::orderInAlphaEW ( ) const [virtual]

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

Returns 0.

Implements ThePEG::MEBase.

Reimplemented in ThePEG::MEee2gZ2qq, and ThePEG::MENCDIS.

double ThePEG::ME2to2QCD::comfac ( ) const

The common prefactor for all 2 $\rightarrow$ 2 QCD sub-processes ie.

$\alpha_S^2$ .

void ThePEG::ME2to2QCD::persistentOutput ( PersistentOStream & os ) const

Function used to write out object persistently.

Parameters:

os

the persistent output stream written to.

Reimplemented from ThePEG::ME2to2Base.

Reimplemented in ThePEG::MEee2gZ2qq, and ThePEG::MENCDIS.

void ThePEG::ME2to2QCD::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::ME2to2Base.

Reimplemented in ThePEG::MEee2gZ2qq, and ThePEG::MENCDIS.

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

ME2to2QCD.h


Public Member Functions
Standard constructors and destructors.
	ME2to2QCD ()
	Default constructor.
virtual	~ME2to2QCD ()
	Destructor.
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.
double	comfac () const
	The common prefactor for all 2 $\rightarrow$ 2 QCD sub-processes ie.
int	maxFlavour () const
	Return the heaviest flavour allowed for this matrix element.
double	Kfac () const
	K-factor for artificially boosting the cross-section.
double	KfacA () const
	K-factor for artificially boosting colour-annihilation diagrams.
bool	interference () const
	Return true if interference terms should be used.
bool	isQuark (const ParticleData &p) const
	Return true if argument is a quark.
tcPDPtr	quark (int i) const
	Return the quark with flavour i (or gluon if i = 0);.
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 interfaces.
Private Member Functions
ME2to2QCD &	operator= (const ME2to2QCD &)
	Private and non-existent assignment operator.
Private Attributes
int	theMaxFlavour
	The heaviest flavour allowed for incoming and outgoing partons.
double	theKfac
	Overall K-factor used to boost this cross-section.
double	theKfacA
	Overall K-factors used to boost the colour annihilation diagram in the cross-section.
bool	useInterference
	Flag so tell whether interference should be used or not.
Static Private Attributes
static AbstractClassDescription < ME2to2QCD >	initME2to2QCD
	Describe an abstract base class with persistent data.