Generate combinations of renormalisation and factorisation scales. More...

#include <ScaleFunction.hh>

Public Member Functions
	ScaleGenerator ()=default

template<class ScaleFunIterator , class FactorIterator >
	ScaleGenerator (ScaleFunIterator scale_functions_begin, ScaleFunIterator scale_functions_end, FactorIterator scale_factors_begin, FactorIterator scale_factors_end, double max_scale_ratio)
	Constructor. More...

	ScaleGenerator (std::vector< ScaleFunction > scales, std::vector< double > scale_factors, double max_scale_ratio)
	Constructor. More...

Event	operator() (Event event) const
	Adjust event parameters, adding scale variation. More...

Detailed Description

Generate combinations of renormalisation and factorisation scales.

Constructor & Destructor Documentation

◆ ScaleGenerator() [1/3]

HEJ::ScaleGenerator::ScaleGenerator ( )

default

◆ ScaleGenerator() [2/3]

template<class ScaleFunIterator , class FactorIterator >

HEJ::ScaleGenerator::ScaleGenerator	(	ScaleFunIterator	scale_functions_begin,
		ScaleFunIterator	scale_functions_end,
		FactorIterator	scale_factors_begin,
		FactorIterator	scale_factors_end,
		double	max_scale_ratio
	)

inline

Constructor.

Parameters

scale_functions_begin	Iterator to first base scale
scale_functions_end	Iterator past last base scale
scale_factors_begin	Iterator to first scale factor
scale_factors_end	Iterator past last scale factor
max_scale_ratio	Maximum ratio between renormalisation and factorisation scale

◆ ScaleGenerator() [3/3]

HEJ::ScaleGenerator::ScaleGenerator	(	std::vector< ScaleFunction >	scales,
		std::vector< double >	scale_factors,
		double	max_scale_ratio
	)

inline

Constructor.

Parameters

scales	Base scales
scale_factors	Factors to multiply the base scales
max_scale_ratio	Maximum ratio between renormalisation and factorisation scale

Member Function Documentation

◆ operator()()

Event HEJ::ScaleGenerator::operator() ( Event event ) const

Adjust event parameters, adding scale variation.

The central renormalisation and factorisation scale of the returned event is given be the first base scale passed to the constructor. The scale variation (stored in event.variation()) is constructed as follows: For each base scale according to the arguments of the constructor we add one variation where both renormalisation and factorisation scale are set according to the current base scale. Then, all combinations where the base renormalisation and factorisation scales are multiplied by one of the scale factors are added. The case were both scales are multiplied by one is skipped. Scale combinations where the ratio is larger than the maximum scale ratio set in the constructor are likewise discarded.

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

/home/andersen/HEJProjects/website/build/hej/include/HEJ/ScaleFunction.hh