The MEqq2ZPrime2ZGamma class implements the matrix element for $q\bar{q}\to Z'\to Z\gamma$ . More...

#include <MEqq2ZPrime2ZGamma.h>

Inheritance diagram for RadiativeZPrime::MEqq2ZPrime2ZGamma:

Public Member Functions
	MEqq2ZPrime2ZGamma ()
	The 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 $\alpha_{EW}$ 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 Energy2	scale () const
	Return the scale associated with the last set phase space point.
virtual void	getDiagrams () const
	Add all possible diagrams with the add() function.
virtual Selector< DiagramIndex >	diagrams (const DiagramVector &dv) const
	Get diagram selector.
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 void	constructVertex (tSubProPtr)
	Construct the vertex of spin correlations.
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 ()
	The standard Init function used to initialize the interfaces.
Protected Member Functions
double	qqME (vector< SpinorWaveFunction > &fin, vector< SpinorBarWaveFunction > &ain, vector< VectorWaveFunction > &Zout, vector< VectorWaveFunction > &gammaout, bool me) const
	Matrix element for $q\bar{q}\to \gamma/Z \to f\bar{f}$ .
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.
Private Member Functions
MEqq2ZPrime2ZGamma &	operator= (const MEqq2ZPrime2ZGamma &)
	The assignment operator is private and must never be called.
Private Attributes
tcPDPtr	_zPrime
	Pointer to the ParticleData object.
ProductionMatrixElement	_me
	Matrix element for spin correlations.

AbstractFFVVertexPtr	_theFFZPrimeVertex
	Pointer to the vertices for the helicity calculations.
AbstractVVVVertexPtr	_theGammaZPrimeZVertex
	Pointer to the $\gamma Z' Z vertex$ .

unsigned int	_maxflavour
	Switches to control the particles in the hard process.
Static Private Attributes
static ClassDescription < MEqq2ZPrime2ZGamma >	initMEqq2ZPrime2ZGamma
	The static object used to initialize the description of this class.

Detailed Description

The MEqq2ZPrime2ZGamma class implements the matrix element for $q\bar{q}\to Z'\to Z\gamma$ .

See also:: The interfaces defined for MEqq2ZPrime2ZGamma.

Definition at line 28 of file MEqq2ZPrime2ZGamma.h.

Member Function Documentation

virtual IBPtr RadiativeZPrime::MEqq2ZPrime2ZGamma::clone ( ) const [inline, protected, virtual]

Make a simple clone of this object.

Returns:: a pointer to the new object.

Implements ThePEG::InterfacedBase.

Definition at line 131 of file MEqq2ZPrime2ZGamma.h.

virtual Selector<const ColourLines *> RadiativeZPrime::MEqq2ZPrime2ZGamma::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> RadiativeZPrime::MEqq2ZPrime2ZGamma::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.

virtual void RadiativeZPrime::MEqq2ZPrime2ZGamma::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.

virtual IBPtr RadiativeZPrime::MEqq2ZPrime2ZGamma::fullclone ( ) const [inline, 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.

Definition at line 137 of file MEqq2ZPrime2ZGamma.h.

static void RadiativeZPrime::MEqq2ZPrime2ZGamma::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.

Reimplemented from Herwig::HwMEBase.

virtual double RadiativeZPrime::MEqq2ZPrime2ZGamma::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.

MEqq2ZPrime2ZGamma& RadiativeZPrime::MEqq2ZPrime2ZGamma::operator= ( const MEqq2ZPrime2ZGamma & ) [private]

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

void RadiativeZPrime::MEqq2ZPrime2ZGamma::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 Herwig::HwMEBase.

void RadiativeZPrime::MEqq2ZPrime2ZGamma::persistentOutput ( PersistentOStream & os ) const

Function used to write out object persistently.

Parameters:

os	the persistent output stream written to.

Reimplemented from Herwig::HwMEBase.

double RadiativeZPrime::MEqq2ZPrime2ZGamma::qqME	(	vector< SpinorWaveFunction > &	fin,
		vector< SpinorBarWaveFunction > &	ain,
		vector< VectorWaveFunction > &	Zout,
		vector< VectorWaveFunction > &	gammaout,
		bool	me
	)		const `[protected]`

Matrix element for $q\bar{q}\to \gamma/Z \to f\bar{f}$ .

Parameters:

fin	Spinors for incoming quark
ain	Spinors for incoming antiquark
Zout	Polarization vectors for outgoing Z
gammaout	Polarization vectors for the the outgoing photon
me	Whether or not to calculate the matrix element for spin correlations