The MEqq2ZPrime2ZGamma2ffGamma class simulates $q\bar{q}\to Z'\to Z\gamma$ including the decay of the Z boson. More...

#include <MEqq2ZPrime2ZGamma2ffGamma.h>

Inheritance diagram for RadiativeZPrime::MEqq2ZPrime2ZGamma2ffGamma:

Public Member Functions
Standard constructors and destructors.
	MEqq2ZPrime2ZGamma2ffGamma ()
	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 int	nDim () const
	The number of internal degrees 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 .
virtual CrossSection	dSigHatDR () const
	Return the matrix element squared differential in the variables given by the last call to generateKinematics().
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	getCosTheta (double cthmin, double cthmax, const double r)
	Used internally by generateKinematics, after calculating the limits on cos(theta).

InvEnergy2	qqbarME (vector< SpinorWaveFunction > &fin, vector< SpinorBarWaveFunction > &ain, vector< VectorWaveFunction > &gout, vector< SpinorBarWaveFunction > &lm, vector< SpinorWaveFunction > &lp, bool me=false) const
	Matrix elements for the different subprocesses.
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
MEqq2ZPrime2ZGamma2ffGamma &	operator= (const MEqq2ZPrime2ZGamma2ffGamma &)
	The assignment operator is private and must never be called.
Private Attributes
ProductionMatrixElement	_me
	Matrix element for spin correlations.
Energy2	_mz2
	Storage of the off-shell Z mass to avoid the need to recalculate.

AbstractFFVVertexPtr	_theFFZVertex
	Vertices for the helicity amplitude calculation.
AbstractFFVVertexPtr	_theFFZPrimeVertex
	Pointer to the vertex.
AbstractVVVVertexPtr	_theGammaZPrimeZVertex
	Pointer to the $\gamma Z' Z vertex$ .
Pointers to the \f$Z^0\f$ and \f$Z'\f$ ParticleData objects
tcPDPtr	_z0
	Pointer to the Z ParticleData object.
tcPDPtr	_zPrime
	Pointer to the ParticleData object.

unsigned int	_maxflavour
	Switches to control the particles in the hard process.
Static Private Attributes
static ClassDescription < MEqq2ZPrime2ZGamma2ffGamma >	initMEqq2ZPrime2ZGamma2ffGamma
	The static object used to initialize the description of this class.

Detailed Description

The MEqq2ZPrime2ZGamma2ffGamma class simulates $q\bar{q}\to Z'\to Z\gamma$ including the decay of the Z boson.

See also:: The interfaces defined for MEqq2ZPrime2ZGamma2ffGamma.

Definition at line 28 of file MEqq2ZPrime2ZGamma2ffGamma.h.

Member Function Documentation

virtual IBPtr RadiativeZPrime::MEqq2ZPrime2ZGamma2ffGamma::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 181 of file MEqq2ZPrime2ZGamma2ffGamma.h.

virtual Selector<const ColourLines *> RadiativeZPrime::MEqq2ZPrime2ZGamma2ffGamma::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::MEqq2ZPrime2ZGamma2ffGamma::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::MEqq2ZPrime2ZGamma2ffGamma::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::MEqq2ZPrime2ZGamma2ffGamma::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 187 of file MEqq2ZPrime2ZGamma2ffGamma.h.

virtual bool RadiativeZPrime::MEqq2ZPrime2ZGamma2ffGamma::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.

Parameters:

r	a pointer to the first of nDim() consecutive random numbers.

Returns:: true if the generation succeeded, otherwise false.

Implements ThePEG::MEBase.

static void RadiativeZPrime::MEqq2ZPrime2ZGamma2ffGamma::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 ThePEG::MEBase.

virtual double RadiativeZPrime::MEqq2ZPrime2ZGamma2ffGamma::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.

MEqq2ZPrime2ZGamma2ffGamma& RadiativeZPrime::MEqq2ZPrime2ZGamma2ffGamma::operator= ( const MEqq2ZPrime2ZGamma2ffGamma & ) [private]

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

void RadiativeZPrime::MEqq2ZPrime2ZGamma2ffGamma::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.

void RadiativeZPrime::MEqq2ZPrime2ZGamma2ffGamma::persistentOutput ( PersistentOStream & os ) const

Function used to write out object persistently.

Parameters:

os	the persistent output stream written to.

Reimplemented from ThePEG::MEBase.

InvEnergy2 RadiativeZPrime::MEqq2ZPrime2ZGamma2ffGamma::qqbarME	(	vector< SpinorWaveFunction > &	fin,
		vector< SpinorBarWaveFunction > &	ain,
		vector< VectorWaveFunction > &	gout,
		vector< SpinorBarWaveFunction > &	lm,
		vector< SpinorWaveFunction > &	lp,
		bool	me = `false`
	)		const `[protected]`

Matrix elements for the different subprocesses.

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

Parameters:

fin	Spinors for incoming quark
ain	Spinors for incoming antiquark
gout	Polarization vectors for the outgoing photon
lm	Spinors for outgoing lepton
lp	Spinors for outgoing antilepton
me	Whether or not to calculate the matrix element for spin correlations