HEJ::MatrixElement Class Reference

Class to calculate the squares of matrix elements. More...

#include <MatrixElement.hh>

Public Member Functions
	MatrixElement (std::function< double(double)> alpha_s, MatrixElementConfig conf)
	MatrixElement Constructor. More...
Weights	operator() (Event const &event) const
	squares of regulated HEJ matrix elements More...
Weights	tree (Event const &event) const
	Squares of HEJ tree-level matrix elements. More...
Weights	virtual_corrections (Event const &event) const
	Virtual corrections to matrix element squares. More...

Detailed Description

Class to calculate the squares of matrix elements.

Constructor & Destructor Documentation

MatrixElement()

HEJ::MatrixElement::MatrixElement	(	std::function< double(double)>	alpha_s,
		MatrixElementConfig	conf
	)

MatrixElement Constructor.

Parameters

alpha_s	Function taking the renormalisation scale and returning the strong coupling constant
conf	General matrix element settings

Member Function Documentation

operator()()

Weights HEJ::MatrixElement::operator()

(

Event const &

event

)

const

squares of regulated HEJ matrix elements

Parameters

event

The event for which to calculate matrix elements

Returns

The squares of HEJ matrix elements including virtual corrections

cf. eq. (22) in [1]

tree()

Weights HEJ::MatrixElement::tree

(

Event const &

event

)

const

Squares of HEJ tree-level matrix elements.

Parameters

event

The event for which to calculate matrix elements

Returns

The squares of HEJ matrix elements without virtual corrections

cf. eq. (22) in [1]

virtual_corrections()

Weights HEJ::MatrixElement::virtual_corrections

(

Event const &

event

)

const

Virtual corrections to matrix element squares.

Parameters

event

The event for which to calculate matrix elements

Returns

The virtual corrections to the squares of the matrix elements

The all order virtual corrections to LL in the MRK limit is given by replacing 1/t in the scattering amplitude according to the lipatov ansatz.

cf. second-to-last line of eq. (22) in [1] note that indices are off by one, i.e. out[0].p corresponds to p_1

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The documentation for this class was generated from the following file:

• /home/andersen/HEJProjects/website/build/hej/include/HEJ/MatrixElement.hh