apfel::Dglap< T > Class Template Reference

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