Models/StandardModel/SMWWHHVertex.h

0001 // -*- C++ -*-
0002 #ifndef HERWIG_SMWWHHVertex_H
0003 #define HERWIG_SMWWHHVertex_H
0004 //
0005 // This is the declaration of the SMWWHHVertex class.
0006 //
0007
0008 #include "ThePEG/Helicity/Vertex/Scalar/VVSSVertex.h"
0009
0010 namespace Herwig {
0011
0012 using namespace ThePEG;
0013
0014 /**
0015  * Here is the documentation of the SMWWHHVertex class.
0016  *
0017  * @see \ref SMWWHHVertexInterfaces "The interfaces"
0018  * defined for SMWWHHVertex.
0019  */
0020 class SMWWHHVertex: public Helicity::VVSSVertex {
0021
0022 public:
0023
0024   /**
0025    * The default constructor.
0026    */
0027   SMWWHHVertex();
0028
0029   /**
0030    * Calculate the couplings.
0031    * @param q2 The scale \f$q^2\f$ for the coupling at the vertex.
0032    * @param part1 The ParticleData pointer for the first  particle.
0033    * @param part2 The ParticleData pointer for the second particle.
0034    * @param part3 The ParticleData pointer for the third  particle.
0035    * @param part4 The ParticleData pointer for the fourth particle.
0036    */
0037   virtual void setCoupling(Energy2 q2,tcPDPtr part1,tcPDPtr part2,tcPDPtr part3,
0038                tcPDPtr part4);
0039
0040   /** @name Functions used by the persistent I/O system. */
0041   //@{
0042   /**
0043    * Function used to write out object persistently.
0044    * @param os the persistent output stream written to.
0045    */
0046   void persistentOutput(PersistentOStream & os) const;
0047
0048   /**
0049    * Function used to read in object persistently.
0050    * @param is the persistent input stream read from.
0051    * @param version the version number of the object when written.
0052    */
0053   void persistentInput(PersistentIStream & is, int version);
0054   //@}
0055
0056   /**
0057    * The standard Init function used to initialize the interfaces.
0058    * Called exactly once for each class by the class description system
0059    * before the main function starts or
0060    * when this class is dynamically loaded.
0061    */
0062   static void Init();
0063
0064 protected:
0065
0066   /** @name Clone Methods. */
0067   //@{
0068   /**
0069    * Make a simple clone of this object.
0070    * @return a pointer to the new object.
0071    */
0072   virtual IBPtr clone() const;
0073
0074   /** Make a clone of this object, possibly modifying the cloned object
0075    * to make it sane.
0076    * @return a pointer to the new object.
0077    */
0078   virtual IBPtr fullclone() const;
0079   //@}
0080
0081 protected:
0082
0083   /** @name Standard Interfaced functions. */
0084   //@{
0085   /**
0086    * Initialize this object after the setup phase before saving an
0087    * EventGenerator to disk.
0088    * @throws InitException if object could not be initialized properly.
0089    */
0090   virtual void doinit();
0091   //@}
0092
0093 private:
0094
0095   /**
0096    * The assignment operator is private and must never be called.
0097    * In fact, it should not even be implemented.
0098    */
0099   SMWWHHVertex & operator=(const SMWWHHVertex &) = delete;
0100
0101 private:
0102
0103   /**
0104    *  ratio of masses
0105    */
0106   double ratio_;
0107
0108   /**
0109    *  The last value of the electroweak coupling calculated.
0110    */
0111   Complex couplast_;
0112
0113   /**
0114    *  The scale \f$q^2\f$ at which the coupling was last evaluated.
0115    */
0116   Energy2 q2last_;
0117
0118 };
0119
0120 }
0121
0122 #endif /* HERWIG_SMWWHHVertex_H */