#include <TMDlib_UnintegratedGluonKS.h>

Public Member Functions
	UnintegratedGluon ()

	UnintegratedGluon (string filename, gsl_interp_type int_type)

vector< int >	grid_size () const
	return size of the grid in each dimension More...

vector< pair< double, double > >	grid_limits () const

double	xg (double logx, double logkt2, double logmu2=0.0)

virtual	~UnintegratedGluon ()

Detailed Description

Computing unintegrated gluon by interpolating an input grid

The form of the 2d grid is assumed to be:

 # logx   logkt2    xg
    i1     j1      val1
    ...    ...     ...
    i1     jn      valn
    i2     j1      valn+1
    ...    ...     ...
    i2     jn      valn*m

and both variables have to grow monotonically.

IMPORTANT: normalization of gluon

In case of problems in gluon evaluation a corresponding error is written to the unintegratedgluon.err file which is always produced by this class. The possible error codes are

Err001 : Evaluation outside the domain of the grid.
Err002 : Negative value of the gluon.

In each of the above cases the return value of the xg(double logx, double logkt2) function is set to zero.

Todo:

add description of normalization, perhaps remove functions _norm_f/F

Constructor & Destructor Documentation

◆ UnintegratedGluon() [1/2]

UnintegratedGluon::UnintegratedGluon ( )

base constructor taking the grid at input

Parameters

filename	name of the input grid file
int_type	type of interpolation; it takes gsl defined values gsl_interp_linear or gsl_interp_cspline

◆ UnintegratedGluon() [2/2]

UnintegratedGluon::UnintegratedGluon	(	string	filename,
		gsl_interp_type	int_type
	)

References filename, grid2d, and grid3d.

◆ ~UnintegratedGluon()

UnintegratedGluon::~UnintegratedGluon ( )

virtual

Member Function Documentation

◆ grid_limits()

vector<pair <double, double> > UnintegratedGluon::grid_limits ( ) const

inline

return grid limits in form of 2d vector of pairs: [[x1min,x1max], [x2min, x2max]]

Min and max values in each dimension can be obtained by using first or second pair data members.

Referenced by xg().

◆ grid_size()

vector< int > UnintegratedGluon::grid_size ( ) const

return size of the grid in each dimension

◆ xg()

double UnintegratedGluon::xg	(	double	logx,
		double	logkt2,
		double	logmu2 = `0.0`
	)

value of the unintegrated gluon