Helicity/Vertex/AbstractVVVSVertex.h

0001 // -*- C++ -*-
0002 #ifndef HELICITY_AbstractVVVSVertex_H
0003 #define HELICITY_AbstractVVVSVertex_H
0004 //
0005 // This is the declaration of the AbstractVVVSVertex class.
0006 //
0007
0008 #include "VertexBase.h"
0009 #include "ThePEG/Helicity/WaveFunction/VectorWaveFunction.h"
0010 #include "ThePEG/Helicity/WaveFunction/ScalarWaveFunction.h"
0011 #include "AbstractVVVSVertex.fh"
0012
0013 namespace ThePEG {
0014 namespace Helicity {
0015
0016 /**
0017  * The AbstractVVVSVertex class provides the base class for all
0018  * vector-vector-vector interactions in ThePEG
0019  */
0020 class AbstractVVVSVertex: public VertexBase {
0021
0022 public:
0023
0024   /**
0025    * Default constructor
0026    */
0027   AbstractVVVSVertex() : VertexBase(VertexType::VVVS) {}
0028
0029   /**
0030    * Members to calculate the helicity amplitude expressions for vertices
0031    * and off-shell particles.
0032    */
0033   //@{
0034   /**
0035    * Evaluate the vertex.
0036    * @param q2 The scale \f$q^2\f$ for the coupling at the vertex.
0037    * @param vec1 The wavefunction for the first  vector.
0038    * @param vec2 The wavefunction for the second vector.
0039    * @param vec3 The wavefunction for the third  vector.
0040    * @param sca  The wavefunction for the scalar particle
0041    */
0042   virtual Complex evaluate(Energy2 q2, const VectorWaveFunction & vec1,
0043                const VectorWaveFunction & vec2,
0044                const VectorWaveFunction & vec3,
0045                const ScalarWaveFunction & sca) = 0;
0046
0047   /**
0048    * Evaluate the off-shell vector coming from the vertex.
0049    * @param q2 The scale \f$q^2\f$ for the coupling at the vertex.
0050    * @param iopt Option of the shape of the Breit-Wigner for the off-shell vector.
0051    * @param out The ParticleData pointer for the off-shell vector.
0052    * @param vec2 The wavefunction for the second vector.
0053    * @param vec3 The wavefunction for the third  vector.
0054    * @param sca  The wavefunction for the scalar particle
0055    * @param mass The mass of the off-shell particle if not taken from the ParticleData
0056    * object
0057    * @param width The width of the off-shell particle if not taken from the ParticleData
0058    * object
0059    */
0060   virtual VectorWaveFunction evaluate(Energy2 q2,int iopt, tcPDPtr out,
0061                       const VectorWaveFunction & vec2,
0062                       const VectorWaveFunction & vec3,
0063                       const ScalarWaveFunction & sca,
0064                       complex<Energy> mass=-GeV, complex<Energy> width=-GeV) = 0;
0065
0066   /**
0067    * Evaluate the off-shell scalar coming from the vertex.
0068    * @param q2 The scale \f$q^2\f$ for the coupling at the vertex.
0069    * @param iopt Option of the shape of the Breit-Wigner for the off-shell scalar.
0070    * @param out The ParticleData pointer for the off-shell scalar.
0071    * @param vec1 The wavefunction for the first vector.
0072    * @param vec2 The wavefunction for the second vector.
0073    * @param vec3 The wavefunction for the third  vector.
0074    * @param mass The mass of the off-shell particle if not taken from the ParticleData
0075    * object
0076    * @param width The width of the off-shell particle if not taken from the ParticleData
0077    * object
0078    */
0079   virtual ScalarWaveFunction evaluate(Energy2 q2,int iopt, tcPDPtr out,
0080                       const VectorWaveFunction & vec1,
0081                       const VectorWaveFunction & vec2,
0082                       const VectorWaveFunction & vec3,
0083                       complex<Energy> mass=-GeV, complex<Energy> width=-GeV) = 0;
0084   //@}
0085
0086 public:
0087
0088   /**
0089    * The standard Init function used to initialize the interfaces.
0090    * Called exactly once for each class by the class description system
0091    * before the main function starts or
0092    * when this class is dynamically loaded.
0093    */
0094   static void Init();
0095
0096 private:
0097
0098   /**
0099    * The assignment operator is private and must never be called.
0100    * In fact, it should not even be implemented.
0101    */
0102   AbstractVVVSVertex & operator=(const AbstractVVVSVertex &) = delete;
0103
0104 };
0105
0106 }
0107 }
0108
0109 #endif /* HELICITY_AbstractVVVSVertex_H */