ThePEG  1.8.0
MEQQ2GG.h
1 // -*- C++ -*-
2 //
3 // MEQQ2GG.h is a part of ThePEG - Toolkit for HEP Event Generation
4 // Copyright (C) 1999-2011 Leif Lonnblad
5 //
6 // ThePEG is licenced under version 2 of the GPL, see COPYING for details.
7 // Please respect the MCnet academic guidelines, see GUIDELINES for details.
8 //
9 #ifndef ThePEG_MEQQ2GG_H
10 #define ThePEG_MEQQ2GG_H
11 // This is the declaration of the MEQQ2GG class.
12 
13 #include "ThePEG/MatrixElement/ME2to2QCD.h"
14 
15 namespace ThePEG {
16 
25 class MEQQ2GG: public ME2to2QCD {
26 
27 public:
28 
38  virtual double me2() const;
39 
43  virtual void getDiagrams() const;
44 
53  colourGeometries(tcDiagPtr diag) const;
54 
63  virtual Selector<DiagramIndex> diagrams(const DiagramVector & dv) const;
65 
66 protected:
67 
75  double colA() const
76  {
77  return uHat()/tHat() - 2.0*sqr(uHat()/sHat());
78  }
79 
80 
85  double colB() const
86  {
87  return tHat()/uHat() - 2.0*sqr(tHat()/sHat());
88  }
89 
91 
92 public:
93 
97  static void Init();
98 
99 protected:
100 
107  virtual IBPtr clone() const;
108 
113  virtual IBPtr fullclone() const;
115 
116 private:
117 
122 
126  MEQQ2GG & operator=(const MEQQ2GG &);
127 
128 };
129 
130 }
131 
132 
133 namespace ThePEG {
134 
139 template <>
140 struct BaseClassTrait<MEQQ2GG,1>: public ClassTraitsType {
142  typedef ME2to2QCD NthBase;
143 };
144 
147 template <>
148 struct ClassTraits<MEQQ2GG>: public ClassTraitsBase<MEQQ2GG> {
150  static string className() { return "ThePEG::MEQQ2GG"; }
154  static string library() { return "MEQCD.so"; }
155 };
156 
159 }
160 
161 #endif /* ThePEG_MEQQ2GG_H */