Models/UED/UEDW0A1H1Vertex.h

0001 // -*- C++ -*-
0002 //
0003 // UEDW0A1H1Vertex.h is a part of Herwig - A multi-purpose Monte Carlo event generator
0004 // Copyright (C) 2002-2019 The Herwig Collaboration
0005 //
0006 // Herwig is licenced under version 3 of the GPL, see COPYING for details.
0007 // Please respect the MCnet academic guidelines, see GUIDELINES for details.
0008 //
0009 #ifndef HERWIG_UEDW0A1H1Vertex_H
0010 #define HERWIG_UEDW0A1H1Vertex_H
0011 //
0012 // This is the declaration of the UEDW0A1H1Vertex class.
0013 //
0014
0015 #include "ThePEG/Helicity/Vertex/Scalar/VSSVertex.h"
0016 #include "UEDBase.h"
0017
0018 namespace Herwig {
0019 using namespace ThePEG;
0020
0021 /**
0022  * This is the coupling for the vertex \f$ W_{\mu(0)}^\pm A_{(1)}^0 H^\mp_{(1)}\f$.
0023  * It takes the form:
0024  * \f[\pm\frac{g(m_W^2 R^2 + 1/2)}{\sqrt{(1 + m_W^2)(1 + m_Z^2)}}
0025  * \left(p(H_1^\mp) - p(A_1)\right)_\mu \f]
0026  *
0027  * @see \ref UEDW0A1H1VertexInterfaces "The interfaces"
0028  * defined for UEDW0A1H1Vertex.
0029  */
0030 class UEDW0A1H1Vertex: public VSSVertex {
0031
0032 public:
0033
0034   /**
0035    * The default constructor.
0036    */
0037   UEDW0A1H1Vertex();
0038
0039 public:
0040
0041   /** @name Functions used by the persistent I/O system. */
0042   //@{
0043   /**
0044    * Function used to write out object persistently.
0045    * @param os the persistent output stream written to.
0046    */
0047   void persistentOutput(PersistentOStream & os) const;
0048
0049   /**
0050    * Function used to read in object persistently.
0051    * @param is the persistent input stream read from.
0052    * @param version the version number of the object when written.
0053    */
0054   void persistentInput(PersistentIStream & is, int version);
0055   //@}
0056
0057   /**
0058    * The standard Init function used to initialize the interfaces.
0059    * Called exactly once for each class by the class description system
0060    * before the main function starts or
0061    * when this class is dynamically loaded.
0062    */
0063   static void Init();
0064
0065   /** Calculate the coupling
0066    *@param q2 The scale at which to evaluate the coupling
0067    *@param part1 The first interacting particle
0068    *@param part2 The second interacting particle
0069    *@param part3 The third interacting particle
0070    */
0071   virtual void setCoupling(Energy2 q2, tcPDPtr part1, tcPDPtr part2,
0072                tcPDPtr part3);
0073 protected:
0074
0075   /** @name Clone Methods. */
0076   //@{
0077   /**
0078    * Make a simple clone of this object.
0079    * @return a pointer to the new object.
0080    */
0081   virtual IBPtr clone() const {return new_ptr(*this);}
0082
0083   /** Make a clone of this object, possibly modifying the cloned object
0084    * to make it sane.
0085    * @return a pointer to the new object.
0086    */
0087   virtual IBPtr fullclone() const {return new_ptr(*this);}
0088   //@}
0089
0090
0091 protected:
0092
0093   /** @name Standard Interfaced functions. */
0094   //@{
0095   /**
0096    * Initialize this object after the setup phase before saving an
0097    * EventGenerator to disk.
0098    * @throws InitException if object could not be initialized properly.
0099    */
0100   virtual void doinit();
0101   //@}
0102
0103 private:
0104
0105   /**
0106    * The assignment operator is private and must never be called.
0107    * In fact, it should not even be implemented.
0108    */
0109   UEDW0A1H1Vertex & operator=(const UEDW0A1H1Vertex &) = delete;
0110
0111 private:
0112
0113   /**
0114    * The mass-squared of the \f$W\f$ boson.
0115    */
0116   Energy2 theMw2;
0117
0118   /**
0119    * The mass-squared of the \f$Z\f$ boson.
0120    */
0121   Energy2 theMz2;
0122
0123   /**
0124    * The square of the compactification radius.
0125    */
0126   InvEnergy2 theR2;
0127
0128   /**
0129    * The scale at which the coupling was last evaluated.
0130    */
0131   Energy2 theq2Last;
0132
0133   /**
0134    * The value of the coupling when it was last evaluated.
0135    */
0136   Complex theCoupLast;
0137 };
0138 }
0139
0140
0141 #endif /* HERWIG_UEDW0A1H1Vertex_H */