Base object for the parameterisation of nucleon structure functions. More...

#include <CepGen/StructureFunctions/Parameterisation.h>

Inheritance diagram for Parameterisation:

Collaboration diagram for Parameterisation:

Classes
struct	Arguments

struct	Values

Public Member Functions
	Parameterisation (const ParametersList &)

virtual	~Parameterisation ()=default

const sigrat::Parameterisation *	sigmaRatio () const
	Longitudinal/transverse cross section ratio parameterisation used to compute \(F_{1/L}\).

Parameterisation &	operator() (double, double)
	Compute all relevant structure functions for a given \((x_{\rm Bj},Q^2)\) couple.

double	F2 (double xbj, double q2)
	Transverse structure function.

double	FL (double xbj, double q2)
	Longitudinal structure function.

double	W1 (double xbj, double q2)
	Longitudinal form factor.

double	W2 (double xbj, double q2)

double	FE (double xbj, double q2)
	Electric proton form factor.

double	FM (double xbj, double q2)
	Magnetic proton form factor.

double	F1 (double xbj, double q2)
	\(F_1\) structure function

const std::string &	name () const
	Module unique indexing name.

bool	operator== (const SteeredObject &oth) const
	Equality operator.

bool	operator!= (const SteeredObject &oth) const
	Inequality operator.

const ParametersList &	parameters () const override
	Module user-defined parameters.

virtual void	setParameters (const ParametersList &params) override
	Set module parameters.

void	setDescribedParameters (const ParametersList &params_orig)
	Set (documented) module parameters.

Static Public Member Functions
static ParametersDescription	description ()
	Generic description for the structure functions.

Protected Member Functions
virtual void	eval ()=0
	Local structure functions evaluation method.

virtual Parameterisation &	computeFL (double xbj, double q2)
	Compute the longitudinal structure function for a given point.

virtual Parameterisation &	computeFL (double xbj, double q2, double r)
	Compute the longitudinal structure function for a given point.

Parameterisation &	clear ()
	Reset the structure functions values.

Parameterisation &	setF1F2 (double f1, double f2)

Parameterisation &	setF2 (double f2)

Parameterisation &	setFL (double fl)

Parameterisation &	setW1 (double w1)

Parameterisation &	setW2 (double w2)

Parameterisation &	setFE (double fe)

Parameterisation &	setFM (double fm)

double	tau (double xbj, double q2) const
	Compute the dimensionless variable \(\tau=\frac{4x_{\rm Bj}^2m_p^2}{Q^2}\).

double	gamma2 (double xbj, double q2) const
	Dimensionless variable \(\gamma^2=1+\frac{4x_{\rm Bj}^2 m_p^2}{Q^2}=1+\tau\).

template<typename T >
T	steer (const std::string &key) const
	Retrieve a parameters as previously steered.

template<typename T , typename U >
U	steerAs (const std::string &key) const
	Retrieve a recasted parameters as previously steered.

std::string	steerName () const
	Retrieve module name from parameters.

std::string	steerPath (const std::string &key) const
	Retrieve a path from common search paths.

Protected Attributes
const double	mp_
	Proton mass, in GeV/c^2.

const double	mp2_
	Squared proton mass, in GeV^2/c^4.

const double	mx_min_
	Minimum diffractive mass, in GeV/c^2.

Arguments	args_
	Last \((x_{\rm Bj},Q^2)\) couple computed.

const std::string	name_
	Module unique indexing name.

ParametersList	params_
	Module parameters.

Friends
std::ostream &	operator<< (std::ostream &, const Parameterisation &)
	Human-readable dump of the SF parameterisation at this (xBj,Q^2) value.

Detailed Description

Definition at line 30 of file Parameterisation.h.

Constructor & Destructor Documentation

◆ Parameterisation()

Parameterisation ( const ParametersList & params )

explicit

Definition at line 27 of file Parameterisation.cpp.

◆ ~Parameterisation()

virtual ~Parameterisation ( )

virtualdefault

Member Function Documentation

◆ clear()

Parameterisation & clear ( )

protected

Definition at line 51 of file Parameterisation.cpp.

◆ computeFL() [1/2]

Parameterisation & computeFL	(	double	xbj,
		double	q2
	)

protectedvirtual

Reimplemented in ChristyBosted, and Grid.

Definition at line 118 of file Parameterisation.cpp.

◆ computeFL() [2/2]

Parameterisation & computeFL	(	double	xbj,
		double	q2,
		double	r
	)

protectedvirtual

Reimplemented in ChristyBosted, and Grid.

Definition at line 127 of file Parameterisation.cpp.

◆ description()

ParametersDescription description ( )

static

Definition at line 148 of file Parameterisation.cpp.

◆ eval()

virtual void eval ( )

protectedpure virtual

Implemented in ALLM, BlockDurandHa, BodekKangXu, CapellaEtAl, ChristyBosted, CLAS, DonnachieLandshoff, FioreBrasse, KulaginBarinov, Grid, Schaefer, Shamov, SuriYennie, and PartonicParameterisation.

◆ F1()

double F1	(	double	xbj,
		double	q2
	)

Definition at line 73 of file Parameterisation.cpp.

◆ F2()

double F2	(	double	xbj,
		double	q2
	)

Definition at line 57 of file Parameterisation.cpp.

◆ FE()

double FE	(	double	xbj,
		double	q2
	)

Definition at line 69 of file Parameterisation.cpp.

◆ FL()

double FL	(	double	xbj,
		double	q2
	)

Definition at line 59 of file Parameterisation.cpp.

◆ FM()

double FM	(	double	xbj,
		double	q2
	)

Definition at line 71 of file Parameterisation.cpp.

◆ gamma2()

double gamma2	(	double	xbj,
		double	q2
	)		const

protected

Definition at line 116 of file Parameterisation.cpp.

◆ name()

const std::string & name ( ) const

inherited

Definition at line 42 of file NamedModule.h.

◆ operator!=()

template<typename T >

bool operator!= ( const SteeredObject< T > & oth ) const

inherited

Definition at line 51 of file SteeredObject.h.

◆ operator()()

Parameterisation & operator()	(	double	xbj,
		double	q2
	)

Parameters

[in]	xbj	Bjorken's x variable
[in]	q2	Squared 4-momentum transfer (in GeV^2)

Definition at line 37 of file Parameterisation.cpp.

◆ operator==()

template<typename T >

bool operator== ( const SteeredObject< T > & oth ) const

inherited

Definition at line 49 of file SteeredObject.h.

◆ parameters()

template<typename T >

const ParametersList & parameters ( ) const

overridevirtualinherited

Reimplemented from Steerable.

Definition at line 54 of file SteeredObject.h.

◆ setDescribedParameters()

template<typename T >

void setDescribedParameters ( const ParametersList & params_orig )

inherited

Definition at line 73 of file SteeredObject.h.

◆ setF1F2()

Parameterisation & setF1F2	(	double	f1,
		double	f2
	)

protected

Definition at line 77 of file Parameterisation.cpp.

◆ setF2()

Parameterisation & setF2 ( double f2 )

protected

Definition at line 83 of file Parameterisation.cpp.

◆ setFE()

Parameterisation & setFE ( double fe )

protected

Definition at line 104 of file Parameterisation.cpp.

◆ setFL()

Parameterisation & setFL ( double fl )

protected

Definition at line 88 of file Parameterisation.cpp.

◆ setFM()

Parameterisation & setFM ( double fm )

protected

Definition at line 109 of file Parameterisation.cpp.

◆ setParameters()

template<typename T >

virtual void setParameters ( const ParametersList & params )

overridevirtualinherited

Reimplemented from Steerable.

Reimplemented in Initial, Remnants, CutsList, IncomingBeams, and Kinematics.

Definition at line 62 of file SteeredObject.h.

◆ setW1()

Parameterisation & setW1 ( double w1 )

protected

Definition at line 94 of file Parameterisation.cpp.

◆ setW2()

Parameterisation & setW2 ( double w2 )

protected

Definition at line 99 of file Parameterisation.cpp.

◆ sigmaRatio()

const sigrat::Parameterisation * sigmaRatio ( ) const

Definition at line 41 of file Parameterisation.h.

◆ steer()

template<typename T >

T steer ( const std::string & key ) const

protectedinherited

Definition at line 39 of file Steerable.h.

◆ steerAs()

template<typename T , typename U >

U steerAs ( const std::string & key ) const

protectedinherited

Definition at line 44 of file Steerable.h.

◆ steerName()

std::string steerName ( ) const

protectedinherited

Definition at line 48 of file Steerable.h.

◆ steerPath()

std::string steerPath ( const std::string & key ) const

protectedinherited

Definition at line 30 of file Steerable.cpp.

◆ tau()

double tau	(	double	xbj,
		double	q2
	)		const

protected

Definition at line 114 of file Parameterisation.cpp.

◆ W1()

double W1	(	double	xbj,
		double	q2
	)

Definition at line 65 of file Parameterisation.cpp.

◆ W2()

double W2	(	double	xbj,
		double	q2
	)

Definition at line 67 of file Parameterisation.cpp.

Friends And Related Symbol Documentation

◆ operator<<

std::ostream & operator<<	(	std::ostream &	os,
		const Parameterisation &	sf
	)

friend

Definition at line 133 of file Parameterisation.cpp.

Member Data Documentation

◆ args_

Arguments args_

protected

Definition at line 109 of file Parameterisation.h.

◆ mp2_

const double mp2_

protected

Definition at line 106 of file Parameterisation.h.

◆ mp_

const double mp_

protected

Definition at line 105 of file Parameterisation.h.

◆ mx_min_

const double mx_min_

protected

Definition at line 107 of file Parameterisation.h.

◆ name_

const std::string name_

protectedinherited

Definition at line 45 of file NamedModule.h.

◆ params_

ParametersList params_

mutableprotectedinherited

Definition at line 50 of file Steerable.h.

Classes

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Friends

Detailed Description

Constructor & Destructor Documentation

◆ Parameterisation()

◆ ~Parameterisation()

Member Function Documentation

◆ clear()

◆ computeFL() [1/2]

◆ computeFL() [2/2]

◆ description()

◆ eval()

◆ F1()

◆ F2()

◆ FE()

◆ FL()

◆ FM()

◆ gamma2()

◆ name()

◆ operator!=()

◆ operator()()

◆ operator==()

◆ parameters()

◆ setDescribedParameters()

◆ setF1F2()

◆ setF2()

◆ setFE()

◆ setFL()

◆ setFM()

◆ setParameters()

◆ setW1()

◆ setW2()

◆ sigmaRatio()

◆ steer()

◆ steerAs()

◆ steerName()

◆ steerPath()

◆ tau()

◆ W1()

◆ W2()

Friends And Related Symbol Documentation

◆ operator<<

Member Data Documentation

◆ args_

◆ mp2_

◆ mp_

◆ mx_min_

◆ name_

◆ params_