A \(F_{2,L}\) grid interpolator. More...

Inheritance diagram for Grid:

Collaboration diagram for Grid:

Classes
struct	header_t
	Grid header information as parsed from the file. More...

struct	sfval_t
	Structure functions value at a given \(Q^2/x_{\rm Bj}\) coordinate. More...

Public Member Functions
	Grid (const cepgen::ParametersList &params)
	Grid MSTW structure functions evaluator.

void	eval () override
	Compute the structure functions at a given \(Q^2/x_{\rm Bj}\).

header_t	header () const
	Retrieve the grid's header information.

Grid &	computeFL (double, double) override
	Compute the longitudinal structure function for a given point.

Grid &	computeFL (double, double, double) override
	Compute the longitudinal structure function for a given point.

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 cepgen::ParametersDescription	description ()

Protected Member Functions
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.

Private Member Functions
values_t	eval (coord_t in_coords) const
	Interpolate a point to a given coordinate.

Detailed Description

Definition at line 32 of file MSTWGrid.cpp.

Class Documentation

◆ mstw::Grid::sfval_t

struct mstw::Grid::sfval_t

Definition at line 91 of file MSTWGrid.cpp.

Class Members
double	f2 {0.}	Transverse structure function value.
double	fl {0.}	Longitudinal structure function value.
float	q2 {0.}	four-momentum transfer, in GeV \(^2\)
float	xbj {0.}	Bjorken's scaling variable.

Constructor & Destructor Documentation

◆ Grid()

Grid ( const cepgen::ParametersList & params )

explicit

Definition at line 35 of file MSTWGrid.cpp.

Member Function Documentation

◆ clear()

Parameterisation & clear ( )

protectedinherited

Definition at line 51 of file Parameterisation.cpp.

◆ computeFL() [1/2]

Grid & computeFL	(	double	xbj,
		double	q2
	)

overridevirtual

Reimplemented from Parameterisation.

Definition at line 108 of file MSTWGrid.cpp.

◆ computeFL() [2/2]

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

overridevirtual

Reimplemented from Parameterisation.

Definition at line 109 of file MSTWGrid.cpp.

◆ description()

static cepgen::ParametersDescription description ( )

static

Definition at line 70 of file MSTWGrid.cpp.

◆ eval()

void eval ( )

overridevirtual

Implements Parameterisation.

Definition at line 99 of file MSTWGrid.cpp.

◆ F1()

double F1	(	double	xbj,
		double	q2
	)

inherited

Definition at line 73 of file Parameterisation.cpp.

◆ F2()

double F2	(	double	xbj,
		double	q2
	)

inherited

Definition at line 57 of file Parameterisation.cpp.

◆ FE()

double FE	(	double	xbj,
		double	q2
	)

inherited

Definition at line 69 of file Parameterisation.cpp.

◆ FL()

double FL	(	double	xbj,
		double	q2
	)

inherited

Definition at line 59 of file Parameterisation.cpp.

◆ FM()

double FM	(	double	xbj,
		double	q2
	)

inherited

Definition at line 71 of file Parameterisation.cpp.

◆ gamma2()

double gamma2	(	double	xbj,
		double	q2
	)		const

protectedinherited

Definition at line 116 of file Parameterisation.cpp.

◆ header()

header_t header ( ) const

Definition at line 105 of file MSTWGrid.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
	)

inherited

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
	)

protectedinherited

Definition at line 77 of file Parameterisation.cpp.

◆ setF2()

Parameterisation & setF2 ( double f2 )

protectedinherited

Definition at line 83 of file Parameterisation.cpp.

◆ setFE()

Parameterisation & setFE ( double fe )

protectedinherited

Definition at line 104 of file Parameterisation.cpp.

◆ setFL()

Parameterisation & setFL ( double fl )

protectedinherited

Definition at line 88 of file Parameterisation.cpp.

◆ setFM()

Parameterisation & setFM ( double fm )

protectedinherited

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 )

protectedinherited

Definition at line 94 of file Parameterisation.cpp.

◆ setW2()

Parameterisation & setW2 ( double w2 )

protectedinherited

Definition at line 99 of file Parameterisation.cpp.

◆ sigmaRatio()

const sigrat::Parameterisation * sigmaRatio ( ) const

inherited

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

protectedinherited

Definition at line 114 of file Parameterisation.cpp.

◆ W1()

double W1	(	double	xbj,
		double	q2
	)

inherited

Definition at line 65 of file Parameterisation.cpp.

◆ W2()

double W2	(	double	xbj,
		double	q2
	)

inherited

Definition at line 67 of file Parameterisation.cpp.

Member Data Documentation

◆ args_

Arguments args_

protectedinherited

Definition at line 109 of file Parameterisation.h.

◆ mp2_

const double mp2_

protectedinherited

Definition at line 106 of file Parameterisation.h.

◆ mp_

const double mp_

protectedinherited

Definition at line 105 of file Parameterisation.h.

◆ mx_min_

const double mx_min_

protectedinherited

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

Private Member Functions

Detailed Description

Class Documentation

◆ mstw::Grid::sfval_t

Constructor & Destructor Documentation

◆ Grid()

Member Function Documentation

◆ clear()

◆ computeFL() [1/2]

◆ computeFL() [2/2]

◆ description()

◆ eval()

◆ F1()

◆ F2()

◆ FE()

◆ FL()

◆ FM()

◆ gamma2()

◆ header()

◆ name()

◆ operator!=()

◆ operator()()

◆ operator==()

◆ parameters()

◆ setDescribedParameters()

◆ setF1F2()

◆ setF2()

◆ setFE()

◆ setFL()

◆ setFM()

◆ setParameters()

◆ setW1()

◆ setW2()

◆ sigmaRatio()

◆ steer()

◆ steerAs()

◆ steerName()

◆ steerPath()

◆ tau()

◆ W1()

◆ W2()

Member Data Documentation

◆ args_

◆ mp2_

◆ mp_

◆ mx_min_

◆ name_

◆ params_