The InitialiseEvolution performs all the operations to initialise a DGLAP evolution using an EvolutionSetup object to retrieve the relevant information. This class also provides the necessary functions to access the evolved distributions, coupling(s), and masses. More...

#include <initialiseevolution.h>

Public Member Functions
	InitialiseEvolution (EvolutionSetup const &setup, bool const &WriteGrid=false, std::string const &GridHeader="")
	The InitialiseEvolution constructor.

bool	CheckSetup () const
	The CheckSetup function checks that the input setup is meaningful and compatible with the current capabilities of the code.

void	ReportSetup () const
	The ReportSetup function reports the parameters in a human readable format.

void	InitialiseCouplings ()
	The InitialiseCouplings function intialises and tabulates the running coupling(s).

void	InitialiseDglapObject ()
	The InitialiseDglapObject function intialises the relevant objects for the DGLAP evolution and constructs a Dglap object to be used for the evolution.

void	TabulateEvolution (std::function< std::map< int, double >(double const &, double const &)> const &InSet)
	The TabulateEvolution function computes the DGLAP evolution and tabulates the distributions over and (x,Q2) grid. The tabulated distributions can be accessed via the KnotArray() array function.

void	WriteGridInfo ()
	The WriteGridInfo function creates the folder and writes the info file of the LHAPDF grid.

void	WriteGrid ()
	The WriteGrid function dumps to file in the LHAPDF format the actual PDF grid.

double	Alphas (double const &mu) const
	Function that returns the evolved strong coupling.

std::map< double, std::map< int, LHKnotArray > >	KnotArray () const
	Function that returns the full set of distributions tabulated on the (x,Q2) grid.

TabulateObject< Set< Distribution > >	TabulatedDistributions () const
	Function that returns the full set of distributions as a TabulateObject object.

EvolutionSetup	GetEvolutionSetup () const
	Function that returns the EvolutionSetup object.

Private Attributes
EvolutionSetup	_setup
	Evolution setup object.

bool	_WriteGrid
	Switch to write LHAPDF grids.

std::string	_GridHeader
	Part of the LHAPDF grid header that can be set externally (the format is resposibility of the user)

std::unique_ptr< const Grid >	_g
	x-space grid

std::function< double(double const &)>	_as
	Strong coupling function.

std::map< int, DglapObjects >	_DglapObj
	Dglap evolution objects.

std::map< double, std::map< int, LHKnotArray > >	_KnotArray
	Object that emulates the KnotArray of LHAPDF to be fed to LHAPDF itself.

std::unique_ptr< const TabulateObject< Set< Distribution > > >	_TabulatedDists
	Tabulated distributions.

Detailed Description

The InitialiseEvolution performs all the operations to initialise a DGLAP evolution using an EvolutionSetup object to retrieve the relevant information. This class also provides the necessary functions to access the evolved distributions, coupling(s), and masses.

Constructor & Destructor Documentation

◆ InitialiseEvolution()

apfel::InitialiseEvolution::InitialiseEvolution	(	EvolutionSetup const &	setup,
		bool const &	WriteGrid = false,
		std::string const &	GridHeader = "" )

The InitialiseEvolution constructor.

Parameters

setup	the EvolutionSetup data structure encapsulate the evolution parameters
WriteGrid	switch to enable the writing of grids in the LHAPDF format (default: false)
GridHeader	part of the LHAPDF grid header that can be set externally (default: empty = use default)

Member Function Documentation

◆ Alphas()

double apfel::InitialiseEvolution::Alphas ( double const & mu ) const

inline

Function that returns the evolved strong coupling.

Parameters

mu	the value of the renormalisation scale μ_R

Returns: the evolved strong coupling

◆ CheckSetup()

bool apfel::InitialiseEvolution::CheckSetup ( ) const

The CheckSetup function checks that the input setup is meaningful and compatible with the current capabilities of the code.

Returns: true or false according to whether the check is succesful or not

Note: Of course, not all possible checks are implemented. The user has to be careful when modifying the evolution setup and make sure that the settings are reasonable.

◆ GetEvolutionSetup()

EvolutionSetup apfel::InitialiseEvolution::GetEvolutionSetup ( ) const

inline

Function that returns the EvolutionSetup object.

Returns: the the _setup object

◆ InitialiseCouplings()

void apfel::InitialiseEvolution::InitialiseCouplings ( )

The InitialiseCouplings function intialises and tabulates the running coupling(s).

◆ InitialiseDglapObject()

void apfel::InitialiseEvolution::InitialiseDglapObject ( )

The InitialiseDglapObject function intialises the relevant objects for the DGLAP evolution and constructs a Dglap object to be used for the evolution.

◆ KnotArray()

std::map< double, std::map< int, LHKnotArray > > apfel::InitialiseEvolution::KnotArray ( ) const

inline

Function that returns the full set of distributions tabulated on the (x,Q2) grid.

Returns: the _KnotArray attribute

◆ ReportSetup()

void apfel::InitialiseEvolution::ReportSetup ( ) const

The ReportSetup function reports the parameters in a human readable format.

◆ TabulatedDistributions()

TabulateObject< Set< Distribution > > apfel::InitialiseEvolution::TabulatedDistributions ( ) const

inline

Function that returns the full set of distributions as a TabulateObject object.

Returns: the _KnotArray attribute

◆ TabulateEvolution()

void apfel::InitialiseEvolution::TabulateEvolution ( std::function< std::map< int, double >(double const &, double const &)> const & InSet )

The TabulateEvolution function computes the DGLAP evolution and tabulates the distributions over and (x,Q2) grid. The tabulated distributions can be accessed via the KnotArray() array function.

Parameters

InSet the input set of distributions

◆ WriteGrid()

void apfel::InitialiseEvolution::WriteGrid ( )

The WriteGrid function dumps to file in the LHAPDF format the actual PDF grid.

Note: If the writing of the grid is enabled, this function is called every time that the TabulateEvolution function is called. Therefore this cab be used to compute more members of a given set without reinitialising the evolution.

◆ WriteGridInfo()

void apfel::InitialiseEvolution::WriteGridInfo ( )

The WriteGridInfo function creates the folder and writes the info file of the LHAPDF grid.

Member Data Documentation

◆ _as

std::function<double(double const&)> apfel::InitialiseEvolution::_as

private

Strong coupling function.

◆ _DglapObj

std::map<int, DglapObjects> apfel::InitialiseEvolution::_DglapObj

private

Dglap evolution objects.

◆ _g

std::unique_ptr<const Grid> apfel::InitialiseEvolution::_g

private

x-space grid

◆ _GridHeader

std::string apfel::InitialiseEvolution::_GridHeader

private

Part of the LHAPDF grid header that can be set externally (the format is resposibility of the user)

◆ _KnotArray

std::map<double, std::map<int, LHKnotArray> > apfel::InitialiseEvolution::_KnotArray

private

Object that emulates the KnotArray of LHAPDF to be fed to LHAPDF itself.

◆ _setup

EvolutionSetup apfel::InitialiseEvolution::_setup

private

Evolution setup object.

◆ _TabulatedDists

std::unique_ptr<const TabulateObject<Set<Distribution> > > apfel::InitialiseEvolution::_TabulatedDists

private

Tabulated distributions.

◆ _WriteGrid

bool apfel::InitialiseEvolution::_WriteGrid

private

Switch to write LHAPDF grids.

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

/Users/vb262523/Codes/apfelxx/inc/apfel/initialiseevolution.h

Public Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ InitialiseEvolution()

Member Function Documentation

◆ Alphas()

◆ CheckSetup()

◆ GetEvolutionSetup()

◆ InitialiseCouplings()

◆ InitialiseDglapObject()

◆ KnotArray()

◆ ReportSetup()

◆ TabulatedDistributions()

◆ TabulateEvolution()

◆ WriteGrid()

◆ WriteGridInfo()

Member Data Documentation

◆ _as

◆ _DglapObj

◆ _g

◆ _GridHeader

◆ _KnotArray

◆ _setup

◆ _TabulatedDists

◆ _WriteGrid