ThePEG::ME2to2Base Class Reference

ME2to2Base can be used as a base class for any matrix element class implementing 2 $\rightarrow$ 2 processes. More...

#include <ME2to2Base.h>

Inheritance diagram for ThePEG::ME2to2Base:

List of all members.

Public Member Functions

virtual double getCosTheta (double cthmin, double cthmax, const double *r)

Used internally by generateKinematics, after calculating the limits on cos(theta).

int scaleChoice () const

Give the option corresponding to the way the scale of an interaction is calculated.

Standard constructors and destructors.

ME2to2Base ()

Default constructor.

virtual ~ME2to2Base ()

Destructor.

Virtual functions required by the MEBase class.

virtual int nDim () const

The number of internal degreed of freedom used in the matrix element.

virtual bool generateKinematics (const double *r)

Generate internal degrees of freedom given 'nDim()' uniform random numbers in the interval ]0,1[.

virtual CrossSection dSigHatDR () const

Return the matrix element for the kinematical configuation previously provided by the last call to setKinematics().

virtual Energy2 scale () const

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

virtual void setKinematics ()

Set the typed and momenta of the incoming and outgoing partons to be used in subsequent calls to me() and colourGeometries() according to the associated XComb object.

Access cached values in of the last set phase space point.

Energy2 tHat () const

Return the $\hat{t}$ of the last set phase space point.

Energy2 uHat () const

Return the $\hat{u}$ of the last set phase space point.

double phi () const

Return the azimuth angle of 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 interfaces.

Protected Member Functions

Set the cached values in of the last set phase space point.

void tHat (Energy2 e2)

Set the $\hat{t}$ of the last set phase space point.

void uHat (Energy2 e2)

Set the $\hat{u}$ of the last set phase space point.

void phi (double phi)

Set the azimuth angle of the last set phase space point.

Static Protected Member Functions

static Switch< ME2to2Base, int > & interfaceScaleChoice ()

Access to the acutal Switch object used to determine the choice of scale.

Private Member Functions

ME2to2Base & operator= (const ME2to2Base &)

Private and non-existent assignment operator.

Private Attributes

int theScaleChoice

The option indicating how to calculate the scale of an interaction.

Energy2 theLastTHat

The $\hat{t}$ of the last set phase space point.

Energy2 theLastUHat

The $\hat{u}$ of the last set phase space point.

double theLastPhi

The azimuth angle of the last set phase space point.

Static Private Attributes

static
AbstractClassDescription
< ME2to2Base > initME2to2Base

Describe an abstract base class with persistent data.

Detailed Description

ME2to2Base can be used as a base class for any matrix element class implementing 2 $\rightarrow$ 2 processes.

It extends the MEBase base class by implementing the virtual scale() method to return the assumed scale of a given process according to several options. It also caches some useful characteristics of the chosen phase space point, such as tHat(), uHat() and the masses of the external partons.

See also:: The interfaces defined for ME2to2Base.
MEBase

Definition at line 32 of file ME2to2Base.h.

Member Function Documentation

virtual bool ThePEG::ME2to2Base::generateKinematics ( const double * r ) [virtual]

Generate internal degrees of freedom given 'nDim()' uniform random numbers in the interval ]0,1[.

To help the phase space generator, the 'dSigHatDR()' should be a smooth function of these numbers, although this is not strictly necessary. Return false if the chosen points failed the kinematical cuts.

Implements ThePEG::MEBase.

virtual CrossSection ThePEG::ME2to2Base::dSigHatDR ( ) const [virtual]

Return the matrix element for the kinematical configuation previously provided by the last call to setKinematics().

Uses me().

Implements ThePEG::MEBase.

void ThePEG::ME2to2Base::persistentOutput ( PersistentOStream & os ) const

Function used to write out object persistently.

Parameters:

os

the persistent output stream written to.

Reimplemented from ThePEG::MEBase.

Reimplemented in ThePEG::ME2to2QCD, ThePEG::MEee2gZ2qq, and ThePEG::MENCDIS.

void ThePEG::ME2to2Base::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::MEBase.

Reimplemented in ThePEG::ME2to2QCD, ThePEG::MEee2gZ2qq, and ThePEG::MENCDIS.

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

ME2to2Base.h


Public Member Functions
virtual double	getCosTheta (double cthmin, double cthmax, const double *r)
	Used internally by generateKinematics, after calculating the limits on cos(theta).
int	scaleChoice () const
	Give the option corresponding to the way the scale of an interaction is calculated.
Standard constructors and destructors.
	ME2to2Base ()
	Default constructor.
virtual	~ME2to2Base ()
	Destructor.
Virtual functions required by the MEBase class.
virtual int	nDim () const
	The number of internal degreed of freedom used in the matrix element.
virtual bool	generateKinematics (const double *r)
	Generate internal degrees of freedom given 'nDim()' uniform random numbers in the interval ]0,1[.
virtual CrossSection	dSigHatDR () const
	Return the matrix element for the kinematical configuation previously provided by the last call to setKinematics().
virtual Energy2	scale () const
	Return the scale associated with the last set phase space point.
virtual void	setKinematics ()
	Set the typed and momenta of the incoming and outgoing partons to be used in subsequent calls to me() and colourGeometries() according to the associated XComb object.
Access cached values in of the last set phase space point.
Energy2	tHat () const
	Return the $\hat{t}$ of the last set phase space point.
Energy2	uHat () const
	Return the $\hat{u}$ of the last set phase space point.
double	phi () const
	Return the azimuth angle of 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 interfaces.
Protected Member Functions
Set the cached values in of the last set phase space point.
void	tHat (Energy2 e2)
	Set the $\hat{t}$ of the last set phase space point.
void	uHat (Energy2 e2)
	Set the $\hat{u}$ of the last set phase space point.
void	phi (double phi)
	Set the azimuth angle of the last set phase space point.
Static Protected Member Functions
static Switch< ME2to2Base, int > &	interfaceScaleChoice ()
	Access to the acutal Switch object used to determine the choice of scale.
Private Member Functions
ME2to2Base &	operator= (const ME2to2Base &)
	Private and non-existent assignment operator.
Private Attributes
int	theScaleChoice
	The option indicating how to calculate the scale of an interaction.
Energy2	theLastTHat
	The $\hat{t}$ of the last set phase space point.
Energy2	theLastUHat
	The $\hat{u}$ of the last set phase space point.
double	theLastPhi
	The azimuth angle of the last set phase space point.
Static Private Attributes
static AbstractClassDescription < ME2to2Base >	initME2to2Base
	Describe an abstract base class with persistent data.