/usr/include/ThePEG/MatrixElement/MEQq2Qq4.h is in libthepeg-dev 1.8.0-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 | // -*- C++ -*-
//
// MEQq2Qq4.h is a part of ThePEG - Toolkit for HEP Event Generation
// Copyright (C) 1999-2011 Leif Lonnblad
//
// ThePEG is licenced under version 2 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
#ifndef ThePEG_MEQq2Qq_H
#define ThePEG_MEQq2Qq_H
// This is the declaration of the MEQq2Qq class.
#include "ThePEG/MatrixElement/ME2to2QCD.h"
namespace ThePEG {
/**
* MEQq2Qq inherits from ME2to2QCD and implements the standard
* \f$q_iq_j\rightarrow q_iq_j\f$ mmatrix element.
*
* @see \ref MEQq2QqInterfaces "The interfaces"
* defined for MEQq2Qq.
* @see ME2to2QCD
*/
class MEQq2Qq: public ME2to2QCD {
public:
/** @name Virtual functions required by the MEBase class. */
//@{
/**
* The matrix element for the kinematical configuration
* previously provided by the last call to setKinematics(), suitably
* scaled by sHat() to give a dimension-less number.
* @return the matrix element scaled with sHat() to give a
* dimensionless number.
*/
virtual double me2() const;
/**
* Add all possible diagrams with the add() function.
*/
virtual void getDiagrams() const;
/**
* Return a Selector with possible colour geometries for the selected
* diagram weighted by their relative probabilities.
* @param diag the diagram chosen.
* @return the possible colour geometries weighted by their
* relative probabilities.
*/
virtual Selector<const ColourLines *>
colourGeometries(tcDiagPtr diag) const;
/**
* Get diagram selector. With the information previously supplied with the
* setKinematics method, a derived class may optionally
* override this method to weight the given diagrams with their
* (although certainly not physical) relative probabilities.
* @param dv the diagrams to be weighted.
* @return a Selector relating the given diagrams to their weights.
*/
virtual Selector<DiagramIndex> diagrams(const DiagramVector & dv) const;
//@}
protected:
/** @name Internal functions returning the matrix element squared
* for different colour configurations. */
//@{
/**
* Return the matrix element squared (without common pre-factors)
* for the specific colour configuration.
*/
double colA() const
{
return (sqr(uHat()) + sqr(sHat()))/sqr(tHat());
}
//@}
public:
/**
* Standard Init function used to initialize the interfaces.
*/
static void Init();
protected:
/** @name Clone Methods. */
//@{
/**
* Make a simple clone of this object.
* @return a pointer to the new object.
*/
virtual IBPtr clone() const { return new_ptr(*this); }
/** Make a clone of this object, possibly modifying the cloned object
* to make it sane.
* @return a pointer to the new object.
*/
virtual IBPtr fullclone() const { return new_ptr(*this); }
//@}
private:
/**
* Describe a concrete class without persistent data.
*/
static NoPIOClassDescription<MEQq2Qq> initMEQq2Qq;
/**
* Private and non-existent assignment operator.
*/
MEQq2Qq & operator=(const MEQq2Qq &);
};
}
namespace ThePEG {
/** @cond TRAITSPECIALIZATIONS */
/** This template specialization informs ThePEG about the
* base classes of MEQq2Qq. */
template <>
struct BaseClassTrait<MEQq2Qq,1>: public ClassTraitsType {
/** Typedef of the first base class of MEQq2Qq. */
typedef ME2to2QCD NthBase;
};
/** This template specialization informs ThePEG about the name of
* the MEQq2Qq class and the shared object where it is defined. */
template <>
struct ClassTraits<MEQq2Qq>: public ClassTraitsBase<MEQq2Qq> {
/** Return a platform-independent class name */
static string className() { return "ThePEG::MEQq2Qq"; }
/** Return the name of the shared library be loaded to get
* access to the MEQq2Qq class and every other class it uses
* (except the base class). */
static string library() { return "MEQCD.so"; }
};
/** @endcond */
}
#endif /* ThePEG_MEQq2Qq_H */
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