apfel::MatchedEvolution< T > Class Template Reference

The MatchedEvolution class is a template mother class for the computation of the running of a generic quantity in a VFNS. It provides the basic ingredients for the computation and the heavy-quark threshold matching of the running of a given object. More...

#include <matchedevolution.h>

Public Member Functions
	MatchedEvolution ()=delete
virtual	~MatchedEvolution ()=default
	MatchedEvolution (T const &ObjRef, double const &MuRef, std::vector< double > const &Thresholds, int const &nsteps=10)
	The MatchedEvolution constructor.
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.
Getters
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.
Setters
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.

Protected Attributes
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::MatchedEvolution< T >

The MatchedEvolution class is a template mother class for the computation of the running of a generic quantity in a VFNS. It provides the basic ingredients for the computation and the heavy-quark threshold matching of the running of a given object.

Constructor & Destructor Documentation

MatchedEvolution() [1/2]

template<class T >

apfel::MatchedEvolution< T >::MatchedEvolution ( )

delete

~MatchedEvolution()

template<class T >

virtual apfel::MatchedEvolution< T >::~MatchedEvolution ( )

virtualdefault

MatchedEvolution() [2/2]

template<class T >

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

The MatchedEvolution constructor.

Parameters

ObjRef	the reference object
MuRef	the reference scale
Thresholds	vector with the heavy quark threholds
nsteps	number of steps of the ODE solver (default: 10)

Member Function Documentation

Derivative()

template<class T >

virtual T apfel::MatchedEvolution< T >::Derivative ( int const & nf, double const & Mu, T const & Obj ) const

pure virtual

Pure virtual function for the computation of the r.h.s. of a ODE (the derivative).

Parameters

nf	the number of active flavours
Mu	the scale at which the derivative is computed
Obj	the object used to compute the derivative

Returns

the r.h.s. of the ODE

Implemented in apfel::AlphaQCD, apfel::AlphaQCDg, apfel::AlphaQCDQED, apfel::AlphaQCDxi, and apfel::AlphaQED.

Evaluate()

template<class T >

T apfel::MatchedEvolution< T >::Evaluate

(

double const &

mu

)

const

Function that returns the evolved object.

Parameters

mu	the final scale

Returns

the evolved object.

EvolveObject()

template<class T >

virtual T apfel::MatchedEvolution< T >::EvolveObject ( int const & nf, double const & t0, double const & t1, T const & Obj0 ) const

virtual

Virtual function for the computation of the evolution.

Parameters

nf	the number of active flavours
t0	the initial value of the scale
t1	the final value of the scale
Obj0	the starting object

Returns

the object evolved at the scale mu2

Reimplemented in apfel::AlphaQCDg.

GetMuRef()

template<class T >

double apfel::MatchedEvolution< T >::GetMuRef ( ) const

inline

Function that returns the reference scale.

GetNumberOfSteps()

template<class T >

int apfel::MatchedEvolution< T >::GetNumberOfSteps ( ) const

inline

Function that returns the number of steps.

GetObjectRef()

template<class T >

T apfel::MatchedEvolution< T >::GetObjectRef ( ) const

inline

Function that returns the reference value of the object.

GetThresholds()

template<class T >

std::vector< double > apfel::MatchedEvolution< T >::GetThresholds ( ) const

inline

Function that returns the values of the thresholds.

MatchObject()

template<class T >

virtual T apfel::MatchedEvolution< T >::MatchObject ( bool const & Up, int const & nf, T const & Obj ) const

pure virtual

Pure virtual function for the computation of the matching.

Parameters

Up	the direction of the matching: "true" = upward, "false" = downward
nf	the number of active flavours
Obj	the object to be matched

Returns

the matched object on the other side of the threshold

Implemented in apfel::AlphaQCD, apfel::AlphaQCDg, apfel::AlphaQCDQED, apfel::AlphaQCDxi, and apfel::AlphaQED.

SetMuRef()

template<class T >

void apfel::MatchedEvolution< T >::SetMuRef ( double const & MuRef )

inline

Function that sets the reference scale.

Parameters

MuRef

the reference scale

SetNumberOfSteps()

template<class T >

void apfel::MatchedEvolution< T >::SetNumberOfSteps ( int const & nsteps )

inline

Function that sets the number of steps of the RK algorithm.

Parameters

nsteps

the number of steps

SetObjectRef()

template<class T >

void apfel::MatchedEvolution< T >::SetObjectRef ( T ObjRef )

inline

Function that sets the reference value of the object.

Parameters

ObjRef

the reference object

Member Data Documentation

_LogMuRef2

template<class T >

double apfel::MatchedEvolution< T >::_LogMuRef2

protected

_LogThresholds2

template<class T >

std::vector<double> apfel::MatchedEvolution< T >::_LogThresholds2

protected

_MuRef

template<class T >

double apfel::MatchedEvolution< T >::_MuRef

protected

_MuRef2

template<class T >

double apfel::MatchedEvolution< T >::_MuRef2

protected

_nsteps

template<class T >

int apfel::MatchedEvolution< T >::_nsteps

protected

_ObjRef

template<class T >

T apfel::MatchedEvolution< T >::_ObjRef

protected

_Thresholds

template<class T >

std::vector<double> apfel::MatchedEvolution< T >::_Thresholds

protected

_Thresholds2

template<class T >

std::vector<double> apfel::MatchedEvolution< T >::_Thresholds2

protected

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

• /Users/vb262523/Codes/apfelxx/inc/apfel/matchedevolution.h