ThePEG::Helicity::SSSVertex Class Reference

The SSSVertex class is the implementation of the interaction of three scalars. More...

#include <SSSVertex.h>

Inheritance diagram for ThePEG::Helicity::SSSVertex:

ThePEG::Helicity::AbstractSSSVertex ThePEG::Helicity::VertexBase ThePEG::Interfaced ThePEG::InterfacedBase ThePEG::Base ThePEG::Named ThePEG::Pointer::ReferenceCounted

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 ScalarWaveFunction &sca1, const ScalarWaveFunction &sca2, const ScalarWaveFunction &sca3)
 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, Energy mass=-GeV, Energy width=-GeV)
 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

SSSVertexoperator= (const SSSVertex &)
 Private and non-existent assignment operator.

Static Private Attributes

static
AbstractNoPIOClassDescription
< SSSVertex
initSSSVertex
 Describe an abstract base class with persistent data.


Detailed Description

The SSSVertex class is the implementation of the interaction of three 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

\[ic\phi_1\phi_2\phi_3\]

See also:
AbstractSSSVertex

Definition at line 35 of file SSSVertex.h.


Member Function Documentation

Complex ThePEG::Helicity::SSSVertex::evaluate ( Energy2  q2,
const ScalarWaveFunction sca1,
const ScalarWaveFunction sca2,
const ScalarWaveFunction sca3 
) [virtual]

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

Evaluate the vertex.

Parameters:
q2 The scale $q^2$ 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.

Implements ThePEG::Helicity::AbstractSSSVertex.

ScalarWaveFunction ThePEG::Helicity::SSSVertex::evaluate ( Energy2  q2,
int  iopt,
tcPDPtr  out,
const ScalarWaveFunction sca1,
const ScalarWaveFunction sca2,
Energy  mass = -GeV,
Energy  width = -GeV 
) [virtual]

Evaluate the off-shell scalar coming from the vertex.

Parameters:
q2 The scale $q^2$ 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.
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::AbstractSSSVertex.

virtual void ThePEG::Helicity::SSSVertex::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 $q^2$ 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.


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

Generated on Thu Apr 29 12:43:29 2010 for ThePEG by  doxygen 1.5.5