ThePEG::Helicity::GeneralFFVVertex Class Reference

The GeneralFFVVertex class is the base class for all helicity amplitude vertices which use a general form of the fermion-fermion-vector vertex. More...

#include <GeneralFFVVertex.h>

Inheritance diagram for ThePEG::Helicity::GeneralFFVVertex:

List of all members.

Public Member Functions

virtual void setCoupling (Energy2 q2, tcPDPtr part1, tcPDPtr part2, tcPDPtr part3)=0

Calculate the couplings.

Complex evaluate (Energy2 q2, const SpinorWaveFunction &sp1, const SpinorBarWaveFunction &sbar2, const VectorWaveFunction &vec3)

Members to calculate the helicity amplitude expressions for vertices and off-shell particles.

SpinorBarWaveFunction evaluate (Energy2 q2, int iopt, tcPDPtr out, const SpinorBarWaveFunction &sbar2, const VectorWaveFunction &vec3, Energy mass=-GeV, Energy width=-GeV)

Evaluate the off-shell barred spinor coming from the vertex.

VectorWaveFunction evaluate (Energy2 q2, int iopt, tcPDPtr out, const SpinorWaveFunction &sp1, const SpinorBarWaveFunction &sbar2, Energy mass=-GeV, Energy width=-GeV)

Evaluate the off-shell vector coming from the vertex.

SpinorWaveFunction evaluate (Energy2 q2, int iopt, tcPDPtr out, const SpinorWaveFunction &sp1, const VectorWaveFunction &vec3, Energy mass=-GeV, Energy width=-GeV)

Evaluate the off-shell spinor coming from the vertex.

const Complex & getLeft ()

Get the Couplings.

const Complex & getRight ()

Get the right coupling.

const complex< InvEnergy > getLeftSigma ()

Get the left coupling for the $\sigma^{\mu\nu}$ term.

const complex< InvEnergy > getRightSigma ()

Get the right coupling for the $\sigma^{\mu\nu}$ term.

Static Public Member Functions

static void Init ()

Standard Init function used to initialize the interfaces.

Protected Member Functions

void setLeft (const Complex &in)

Set the couplings.

void setRight (const Complex &in)

Set the right coupling.

void setLeftSigma (const complex< InvEnergy > &in)

Set the left coupling for the $\sigma^{\mu\nu}$ term.

void setRightSigma (const complex< InvEnergy > &in)

Set the right coupling for the $\sigma^{\mu\nu}$ term.

Private Member Functions

GeneralFFVVertex & operator= (const GeneralFFVVertex &)

Private and non-existent assignment operator.

Private Attributes

Complex _left

Left $\gamma^\mu$ coupling.

Complex _right

Right $\gamma^\mu$ coupling.

complex< InvEnergy > _leftSigma

Left $\sigma^{\mu\nu}$ coupling.

complex< InvEnergy > _rightSigma

Right $\sigma^{\mu\nu}$ coupling.

Static Private Attributes

static
AbstractNoPIOClassDescription
< GeneralFFVVertex > initGeneralFFVVertex

Describe an abstract class with persistent data.

Detailed Description

The GeneralFFVVertex class is the base class for all helicity amplitude vertices which use a general form of the fermion-fermion-vector vertex.

Any such vertices should inherit from this class and implement the virtual setcoupling member function. The base AbstractFFVVertex class is used to store the particles allowed to interact at the vertex.

The form of the vertex is

$ic\bar{f_2}\gamma^\mu a^\lambda P_\lambda f_1\epsilon_{3\mu}$

See also:: AbstractFFVVertex

Definition at line 38 of file GeneralFFVVertex.h.

Member Function Documentation

Complex ThePEG::Helicity::GeneralFFVVertex::evaluate	(	Energy2	q2,
		const SpinorWaveFunction &	sp1,
		const SpinorBarWaveFunction &	sbar2,
		const VectorWaveFunction &	vec3
	)			`[virtual]`

Members to calculate the helicity amplitude expressions for vertices and off-shell particles.

Evalulate the vertex.

Parameters:

	q2	The scale for the coupling at the vertex.
	sp1	The wavefunction for the ferimon.
	sbar2	The wavefunction for the antifermion.
	vec3	The wavefunction for the vector.

Implements ThePEG::Helicity::AbstractFFVVertex.

SpinorBarWaveFunction ThePEG::Helicity::GeneralFFVVertex::evaluate	(	Energy2	q2,
		int	iopt,
		tcPDPtr	out,
		const SpinorBarWaveFunction &	sbar2,
		const VectorWaveFunction &	vec3,
		Energy	mass = `-GeV`,
		Energy	width = `-GeV`
	)			`[virtual]`

Evaluate the off-shell barred spinor coming from the vertex.

Parameters:

	q2	The scale for the coupling at the vertex.
	iopt	Option of the shape of the Breit-Wigner for the off-shell barred spinor.
	out	The ParticleData pointer for the off-shell barred spinor.
	sbar2	The wavefunction for the antifermion.
	vec3	The wavefunction for the vector.
	mass	The mass of the off-shell particle if not taken from the ParticleData object
	width	The width of the off-shell particle if not taken from the ParticleData object

Implements ThePEG::Helicity::AbstractFFVVertex.

VectorWaveFunction ThePEG::Helicity::GeneralFFVVertex::evaluate	(	Energy2	q2,
		int	iopt,
		tcPDPtr	out,
		const SpinorWaveFunction &	sp1,
		const SpinorBarWaveFunction &	sbar2,
		Energy	mass = `-GeV`,
		Energy	width = `-GeV`
	)			`[virtual]`

Evaluate the off-shell vector coming from the vertex.

Parameters:

	q2	The scale for the coupling at the vertex.
	iopt	Option of the shape of the Breit-Wigner for the off-shell vector.
	out	The ParticleData pointer for the off-shell vector.
	sp1	The wavefunction for the ferimon.
	sbar2	The wavefunction for the antifermion.
	mass	The mass of the off-shell particle if not taken from the ParticleData object
	width	The width of the off-shell particle if not taken from the ParticleData object

Implements ThePEG::Helicity::AbstractFFVVertex.

SpinorWaveFunction ThePEG::Helicity::GeneralFFVVertex::evaluate	(	Energy2	q2,
		int	iopt,
		tcPDPtr	out,
		const SpinorWaveFunction &	sp1,
		const VectorWaveFunction &	vec3,
		Energy	mass = `-GeV`,
		Energy	width = `-GeV`
	)			`[virtual]`

Evaluate the off-shell spinor coming from the vertex.

Parameters:

	q2	The scale for the coupling at the vertex.
	iopt	Option of the shape of the Breit-Wigner for the off-shell spinor.
	out	The ParticleData pointer for the off-shell spinor.
	sp1	The wavefunction for the ferimon.
	vec3	The wavefunction for the vector.
	mass	The mass of the off-shell particle if not taken from the ParticleData object
	width	The width of the off-shell particle if not taken from the ParticleData object

Implements ThePEG::Helicity::AbstractFFVVertex.

virtual void ThePEG::Helicity::GeneralFFVVertex::setCoupling	(	Energy2	q2,
		tcPDPtr	part1,
		tcPDPtr	part2,
		tcPDPtr	part3
	)			`[pure virtual]`

Calculate the couplings.

This method is virtual and must be implemented in classes inheriting from this.

Parameters:

	q2	The scale for the coupling at the vertex.
	part1	The ParticleData pointer for the first particle.
	part2	The ParticleData pointer for the second particle.
	part3	The ParticleData pointer for the third particle.

const Complex& ThePEG::Helicity::GeneralFFVVertex::getLeft ( ) [inline]

Get the Couplings.

Get the left coupling.

Definition at line 130 of file GeneralFFVVertex.h.

References _left.

void ThePEG::Helicity::GeneralFFVVertex::setLeft ( const Complex & in ) [inline, protected]

Set the couplings.

Set the left coupling.

Definition at line 157 of file GeneralFFVVertex.h.

References _left.

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

GeneralFFVVertex.h


Public Member Functions
virtual void	setCoupling (Energy2 q2, tcPDPtr part1, tcPDPtr part2, tcPDPtr part3)=0
	Calculate the couplings.

Complex	evaluate (Energy2 q2, const SpinorWaveFunction &sp1, const SpinorBarWaveFunction &sbar2, const VectorWaveFunction &vec3)
	Members to calculate the helicity amplitude expressions for vertices and off-shell particles.
SpinorBarWaveFunction	evaluate (Energy2 q2, int iopt, tcPDPtr out, const SpinorBarWaveFunction &sbar2, const VectorWaveFunction &vec3, Energy mass=-GeV, Energy width=-GeV)
	Evaluate the off-shell barred spinor coming from the vertex.
VectorWaveFunction	evaluate (Energy2 q2, int iopt, tcPDPtr out, const SpinorWaveFunction &sp1, const SpinorBarWaveFunction &sbar2, Energy mass=-GeV, Energy width=-GeV)
	Evaluate the off-shell vector coming from the vertex.
SpinorWaveFunction	evaluate (Energy2 q2, int iopt, tcPDPtr out, const SpinorWaveFunction &sp1, const VectorWaveFunction &vec3, Energy mass=-GeV, Energy width=-GeV)
	Evaluate the off-shell spinor coming from the vertex.

const Complex &	getLeft ()
	Get the Couplings.
const Complex &	getRight ()
	Get the right coupling.
const complex< InvEnergy >	getLeftSigma ()
	Get the left coupling for the $\sigma^{\mu\nu}$ term.
const complex< InvEnergy >	getRightSigma ()
	Get the right coupling for the $\sigma^{\mu\nu}$ term.
Static Public Member Functions
static void	Init ()
	Standard Init function used to initialize the interfaces.
Protected Member Functions

void	setLeft (const Complex &in)
	Set the couplings.
void	setRight (const Complex &in)
	Set the right coupling.
void	setLeftSigma (const complex< InvEnergy > &in)
	Set the left coupling for the $\sigma^{\mu\nu}$ term.
void	setRightSigma (const complex< InvEnergy > &in)
	Set the right coupling for the $\sigma^{\mu\nu}$ term.
Private Member Functions
GeneralFFVVertex &	operator= (const GeneralFFVVertex &)
	Private and non-existent assignment operator.
Private Attributes
Complex	_left
	Left $\gamma^\mu$ coupling.
Complex	_right
	Right $\gamma^\mu$ coupling.
complex< InvEnergy >	_leftSigma
	Left $\sigma^{\mu\nu}$ coupling.
complex< InvEnergy >	_rightSigma
	Right $\sigma^{\mu\nu}$ coupling.
Static Private Attributes
static AbstractNoPIOClassDescription < GeneralFFVVertex >	initGeneralFFVVertex
	Describe an abstract class with persistent data.