The Dglap class is specialization class of the MatchedEvolution class for the computation of the DGLAP evolution. More...

#include <dglap.h>

Inheritance diagram for apfel::Dglap< T >:

Public Member Functions
	Dglap ()=delete

	Dglap (std::function< Set< Operator >(int const &, double const &)> const &SplittingFunctions, std::function< Set< Operator >(bool const &, int const &)> const &MatchingConditions, Set< T > const &ObjRef, double const &MuRef, std::vector< double > const &Thresholds, int const &nsteps=10)
	Dglap constructor.

Set< T >	MatchObject (bool const &Up, int const &nf, Set< T > const &sd) const
	Function that matches the evolved object at the thresholds.

Set< T >	Derivative (int const &nf, double const &t, Set< T > const &f) const
	This function returns the r.h.s. of the DGLAP equation, i.e. the convolution between splitting functions and distributions.

Setters
void	SetInitialDistributions (std::function< double(int const &, double const &)> const &InDistFunc)
	Function that sets the reference object at the reference scale using a function of the index and x.

void	SetInitialDistributions (std::function< std::map< int, double >(double const &)> const &InDistFunc)
	Function that sets the reference distribution at the reference scale using a map of the distribution as function of x.

void	SetInitialDistributions (std::function< std::map< int, double >(double const &, double const &)> const &InDistFunc, double const &mu)
	Function that sets the reference distribution at the reference scale using a map of the distribution as function of x and Q.

Public Member Functions inherited from apfel::MatchedEvolution< Set< T > >
	MatchedEvolution ()=delete

	MatchedEvolution (T const &ObjRef, double const &MuRef, std::vector< double > const &Thresholds, int const &nsteps=10)
	The MatchedEvolution constructor.

virtual	~MatchedEvolution ()=default

virtual T	EvolveObject (int const &nf, double const &t0, double const &t1, T const &Obj0) const
	Virtual function for the computation of the evolution.

virtual T	MatchObject (bool const &Up, int const &nf, T const &Obj) const=0
	Pure virtual function for the computation of the matching.

virtual T	Derivative (int const &nf, double const &Mu, T const &Obj) const=0
	Pure virtual function for the computation of the r.h.s. of a ODE (the derivative).

T	Evaluate (double const &mu) const
	Function that returns the evolved object.

T	GetObjectRef () const
	Function that returns the reference value of the object.

double	GetMuRef () const
	Function that returns the reference scale.

std::vector< double >	GetThresholds () const
	Function that returns the values of the thresholds.

int	GetNumberOfSteps () const
	Function that returns the number of steps.

void	SetObjectRef (T ObjRef)
	Function that sets the reference value of the object.

void	SetMuRef (double const &MuRef)
	Function that sets the reference scale.

void	SetNumberOfSteps (int const &nsteps)
	Function that sets the number of steps of the RK algorithm.

Private Attributes
std::function< Set< Operator >(int const &, double const &)>	_SplittingFunctions

std::function< Set< Operator >(bool const &, int const &)>	_MatchingConditions

Additional Inherited Members
Protected Attributes inherited from apfel::MatchedEvolution< Set< T > >
T	_ObjRef

double	_MuRef

double	_MuRef2

double	_LogMuRef2

std::vector< double >	_Thresholds

int	_nsteps

std::vector< double >	_Thresholds2

std::vector< double >	_LogThresholds2

Detailed Description

template<class T>
class apfel::Dglap< T >

The Dglap class is specialization class of the MatchedEvolution class for the computation of the DGLAP evolution.

Constructor & Destructor Documentation

◆ Dglap() [1/2]

template<class T >

apfel::Dglap< T >::Dglap ( )

delete

◆ Dglap() [2/2]

template<class T >

apfel::Dglap< T >::Dglap	(	std::function< Set< Operator >(int const &, double const &)> const &	SplittingFunctions,
		std::function< Set< Operator >(bool const &, int const &)> const &	MatchingConditions,
		Set< T > const &	ObjRef,
		double const &	MuRef,
		std::vector< double > const &	Thresholds,
		int const &	nsteps = 10 )

Dglap constructor.

Parameters

SplittingFunctions	set of splitting functions
MatchingConditions	set od matching conditions
ObjRef	reference object to be evolved
MuRef	reference scale from which the evolution starts
Thresholds	vector of the heavy quark thresholds
nsteps	number of steps of the ODE solver (default: 10)

Member Function Documentation

◆ Derivative()

template<class T >

Set< T > apfel::Dglap< T >::Derivative	(	int const &	nf,
		double const &	t,
		Set< T > const &	f ) const

This function returns the r.h.s. of the DGLAP equation, i.e. the convolution between splitting functions and distributions.

Parameters

nf	number of active flavours
t	value of the log of the factorisation scale squared
f	set of distributions at the scale mu

Returns: The r.h.s. of the DGLAP equation.

◆ MatchObject()

template<class T >

Set< T > apfel::Dglap< T >::MatchObject	(	bool const &	Up,
		int const &	nf,
		Set< T > const &	sd ) const

Function that matches the evolved object at the thresholds.

Parameters

Up	whether the matching has to be done upward or backward
nf	number of active flavours on this side of the threshold
sd	object on this side of the threshold

Returns: The matched object on the other side of the threshold.

◆ SetInitialDistributions() [1/3]

template<class T >

void apfel::Dglap< T >::SetInitialDistributions ( std::function< double(int const &, double const &)> const & InDistFunc )

Function that sets the reference object at the reference scale using a function of the index and x.

Parameters

InDistFunc the function that returns the distributions.

◆ SetInitialDistributions() [2/3]

template<class T >

void apfel::Dglap< T >::SetInitialDistributions ( std::function< std::map< int, double >(double const &)> const & InDistFunc )

Function that sets the reference distribution at the reference scale using a map of the distribution as function of x.

Parameters

InDistFunc the function that returns the distributions.

◆ SetInitialDistributions() [3/3]

template<class T >

void apfel::Dglap< T >::SetInitialDistributions	(	std::function< std::map< int, double >(double const &, double const &)> const &	InDistFunc,
		double const &	mu )

Function that sets the reference distribution at the reference scale using a map of the distribution as function of x and Q.

Parameters

InDistFunc	the function that returns the distributions.
mu	the scale at which distributions have to be computed

Member Data Documentation

◆ _MatchingConditions

template<class T >

std::function<Set<Operator>(bool const&,int const&)> apfel::Dglap< T >::_MatchingConditions

private

◆ _SplittingFunctions

template<class T >

std::function<Set<Operator>(int const&,double const&)> apfel::Dglap< T >::_SplittingFunctions

private

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

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

Public Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ Dglap() [1/2]

◆ Dglap() [2/2]

Member Function Documentation

◆ Derivative()

◆ MatchObject()

◆ SetInitialDistributions() [1/3]

◆ SetInitialDistributions() [2/3]

◆ SetInitialDistributions() [3/3]

Member Data Documentation

◆ _MatchingConditions

◆ _SplittingFunctions