Models/LH/LHWWHHVertex.h

0001 // -*- C++ -*-
0002 #ifndef HERWIG_LHWWHHVertex_H
0003 #define HERWIG_LHWWHHVertex_H
0004 //
0005 // This is the declaration of the LHWWHHVertex class.
0006 //
0007
0008 #include "ThePEG/Helicity/Vertex/Scalar/VVSSVertex.h"
0009
0010 namespace Herwig {
0011
0012 using namespace ThePEG;
0013
0014 /**
0015  * The LHWWHHVertex class implements the coupling of a pair of
0016  * electroweak gauge bosons and a pair of Higgs bosons in the Little Higgs model.
0017  */
0018 class LHWWHHVertex: public Helicity::VVSSVertex {
0019
0020 public:
0021
0022   /**
0023    * The default constructor.
0024    */
0025   LHWWHHVertex();
0026
0027   /** @name Functions used by the persistent I/O system. */
0028   //@{
0029   /**
0030    * Function used to write out object persistently.
0031    * @param os the persistent output stream written to.
0032    */
0033   void persistentOutput(PersistentOStream & os) const;
0034
0035   /**
0036    * Function used to read in object persistently.
0037    * @param is the persistent input stream read from.
0038    * @param version the version number of the object when written.
0039    */
0040   void persistentInput(PersistentIStream & is, int version);
0041   //@}
0042
0043   /**
0044    * The standard Init function used to initialize the interfaces.
0045    * Called exactly once for each class by the class description system
0046    * before the main function starts or
0047    * when this class is dynamically loaded.
0048    */
0049   static void Init();
0050
0051   /**
0052    * Calculate the couplings. This method is virtual and must be implemented in
0053    * classes inheriting from this.
0054    * @param q2 The scale \f$q^2\f$ for the coupling at the vertex.
0055    * @param part1 The ParticleData pointer for the first  particle.
0056    * @param part2 The ParticleData pointer for the second particle.
0057    * @param part3 The ParticleData pointer for the third  particle.
0058    * @param part4 The ParticleData pointer for the fourth particle.
0059    */
0060   virtual void setCoupling(Energy2 q2,tcPDPtr part1,tcPDPtr part2,tcPDPtr part3,
0061                tcPDPtr part4);
0062
0063 protected:
0064
0065   /** @name Clone Methods. */
0066   //@{
0067   /**
0068    * Make a simple clone of this object.
0069    * @return a pointer to the new object.
0070    */
0071   virtual IBPtr clone() const;
0072
0073   /** Make a clone of this object, possibly modifying the cloned object
0074    * to make it sane.
0075    * @return a pointer to the new object.
0076    */
0077   virtual IBPtr fullclone() const;
0078   //@}
0079
0080 protected:
0081
0082   /** @name Standard Interfaced functions. */
0083   //@{
0084   /**
0085    * Initialize this object after the setup phase before saving an
0086    * EventGenerator to disk.
0087    * @throws InitException if object could not be initialized properly.
0088    */
0089   virtual void doinit();
0090   //@}
0091
0092 private:
0093
0094   /**
0095    * The assignment operator is private and must never be called.
0096    * In fact, it should not even be implemented.
0097    */
0098   LHWWHHVertex & operator=(const LHWWHHVertex &) = delete;
0099
0100 private:
0101
0102   /**
0103    * The value of the coupling when last evaluated
0104    */
0105   Complex couplast_;
0106
0107   /**
0108    * The scale at which the coupling  was last evaluated.
0109    */
0110   Energy2 q2last_;
0111
0112   /**
0113    *  Couplings
0114    */
0115   vector<Complex> coup_;
0116
0117 };
0118
0119 }
0120
0121 #endif /* HERWIG_LHWWHHVertex_H */