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ThePEG 2.3.0
MEQq2Qq4.h
1// -*- C++ -*-
2//
3// MEQq2Qq4.h is a part of ThePEG - Toolkit for HEP Event Generation
4// Copyright (C) 1999-2019 Leif Lonnblad
5//
6// ThePEG is licenced under version 3 of the GPL, see COPYING for details.
7// Please respect the MCnet academic guidelines, see GUIDELINES for details.
8//
9#ifndef ThePEG_MEQq2Qq_H
10#define ThePEG_MEQq2Qq_H
11// This is the declaration of the MEQq2Qq class.
12
13#include "ThePEG/MatrixElement/ME2to2QCD.h"
14
15namespace ThePEG {
16
25class MEQq2Qq: public ME2to2QCD {
26
27public:
28
38 virtual double me2() const;
39
43 virtual void getDiagrams() const;
44
53 colourGeometries(tcDiagPtr diag) const;
54
65
66protected:
67
75 double colA() const
76 {
77 return (sqr(uHat()) + sqr(sHat()))/sqr(tHat());
78 }
80
81public:
82
86 static void Init();
87
88protected:
89
96 virtual IBPtr clone() const { return new_ptr(*this); }
97
102 virtual IBPtr fullclone() const { return new_ptr(*this); }
104
105private:
106
111
115 MEQq2Qq & operator=(const MEQq2Qq &) = delete;
116
117};
118
119}
120
121
122namespace ThePEG {
123
128template <>
129struct BaseClassTrait<MEQq2Qq,1>: public ClassTraitsType {
131 typedef ME2to2QCD NthBase;
132};
133
136template <>
137struct ClassTraits<MEQq2Qq>: public ClassTraitsBase<MEQq2Qq> {
139 static string className() { return "ThePEG::MEQq2Qq"; }
143 static string library() { return "MEQCD.so"; }
144};
145
148}
149
150#endif /* ThePEG_MEQq2Qq_H */
Energy2 tHat() const
Return the of the last set phase space point.
Definition: ME2to2Base.h:109
Energy2 uHat() const
Return the of the last set phase space point.
Definition: ME2to2Base.h:114
The ME2to2QCD class inherits from the ME2to2Base class and can be used as a sub class for all QCD 2 ...
Definition: ME2to2QCD.h:28
vector< DiagPtr > DiagramVector
A vector of pointers to DiagramBase objects.
Definition: MEBase.h:77
Energy2 sHat() const
Return the last set invariant mass squared.
Definition: MEBase.h:375
MEQq2Qq inherits from ME2to2QCD and implements the standard mmatrix element.
Definition: MEQq2Qq4.h:25
virtual IBPtr clone() const
Make a simple clone of this object.
Definition: MEQq2Qq4.h:96
static void Init()
Standard Init function used to initialize the interfaces.
double colA() const
Return the matrix element squared (without common pre-factors) for the specific colour configuration.
Definition: MEQq2Qq4.h:75
virtual void getDiagrams() const
Add all possible diagrams with the add() function.
virtual double me2() const
The matrix element for the kinematical configuration previously provided by the last call to setKinem...
virtual IBPtr fullclone() const
Make a clone of this object, possibly modifying the cloned object to make it sane.
Definition: MEQq2Qq4.h:102
static NoPIOClassDescription< MEQq2Qq > initMEQq2Qq
Describe a concrete class without persistent data.
Definition: MEQq2Qq4.h:110
MEQq2Qq & operator=(const MEQq2Qq &)=delete
Private and non-existent assignment operator.
virtual Selector< const ColourLines * > colourGeometries(tcDiagPtr diag) const
Return a Selector with possible colour geometries for the selected diagram weighted by their relative...
virtual Selector< DiagramIndex > diagrams(const DiagramVector &dv) const
Get diagram selector.
A concreate implementation of ClassDescriptionBase describing a concrete class without persistent dat...
RCPtr is a reference counted (smart) pointer.
Definition: RCPtr.h:60
Selector is a templated class for storing objects associated with probabilities in a way such that,...
Definition: Selector.h:46
Ptr< T >::pointer new_ptr()
Simple interface to the PtrTraits<Ptr>::create()
Definition: PtrTraits.h:195
This is the main namespace within which all identifiers in ThePEG are declared.
Definition: FactoryBase.h:28
constexpr auto sqr(const T &x) -> decltype(x *x)
The square function should really have been included in the standard C++ library.
Definition: ThePEG.h:117
int NthBase
The type of the BaseN'th base class (int means there are no further base classes).
Definition: ClassTraits.h:161
static string className()
Return the name of class T.
Definition: ClassTraits.h:66
static string library()
The name of a file containing the dynamic library where the class T is implemented.
Definition: ClassTraits.h:85