ThePEG::Helicity::SSSSVertex Class Reference

The SSSSVertex class is the implementation of the interaction of four scalars. More...

#include <SSSSVertex.h>

Inheritance diagram for ThePEG::Helicity::SSSSVertex:

List of all members.

Public Member Functions
virtual void	setCoupling (Energy2 q2, tcPDPtr part1, tcPDPtr part2, tcPDPtr part3, tcPDPtr part4)=0
	Calculate the couplings.
Complex	evaluate (Energy2 q2, const ScalarWaveFunction &sca1, const ScalarWaveFunction &sca2, const ScalarWaveFunction &sca3, const ScalarWaveFunction &sca4)
	Members to calculate the helicity amplitude expressions for vertices and off-shell particles.
ScalarWaveFunction	evaluate (Energy2 q2, int iopt, tcPDPtr out, const ScalarWaveFunction &sca1, const ScalarWaveFunction &sca2, const ScalarWaveFunction &sca3)
	Evaluate the off-shell scalar coming from the vertex.
Static Public Member Functions
static void	Init ()
	Standard Init function used to initialize the interfaces.
Private Member Functions
SSSSVertex &	operator= (const SSSSVertex &)
	Private and non-existent assignment operator.
Static Private Attributes
static AbstractNoPIOClassDescription < SSSSVertex >	initSSSSVertex
	Describe an abstract base class with persistent data.

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Detailed Description

The SSSSVertex class is the implementation of the interaction of four scalars.

It inherits from the AbstractSSSVertex class for the storage of the particles interacting at the vertex and implements the helicity calculations.

Any classes implementating the vertex should inherit from it and implement the virtual set Coupling member.

The form of the vertex is

See also:

AbstractSSSVertex

Definition at line 36 of file SSSSVertex.h.

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Member Function Documentation

Complex ThePEG::Helicity::SSSSVertex::evaluate	(	Energy2	q2,
		const ScalarWaveFunction &	sca1,
		const ScalarWaveFunction &	sca2,
		const ScalarWaveFunction &	sca3,
		const ScalarWaveFunction &	sca4
	)

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

Evaluate the vertex.

Parameters:

	q2	The scale for the coupling at the vertex.
	sca1	The wavefunction for the first scalar.
	sca2	The wavefunction for the second scalar.
	sca3	The wavefunction for the third scalar.
	sca4	The wavefunction for the fourth scalar.

ScalarWaveFunction ThePEG::Helicity::SSSSVertex::evaluate	(	Energy2	q2,
		int	iopt,
		tcPDPtr	out,
		const ScalarWaveFunction &	sca1,
		const ScalarWaveFunction &	sca2,
		const ScalarWaveFunction &	sca3
	)

Evaluate the off-shell scalar 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 scalar.
	out	The ParticleData pointer for the off-shell scalar.
	sca1	The wavefunction for the first scalar.
	sca2	The wavefunction for the second scalar.
	sca3	The wavefunction for the third scalar.

virtual void ThePEG::Helicity::SSSSVertex::setCoupling	(	Energy2	q2,
		tcPDPtr	part1,
		tcPDPtr	part2,
		tcPDPtr	part3,
		tcPDPtr	part4
	)			[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.
	part4	The ParticleData pointer for the fourth particle.

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

• SSSSVertex.h