VGG process model for DVCS. More...

Inheritance diagram for PARTONS::DVCSProcessVGG99:

Public Member Functions
	DVCSProcessVGG99 (const std::string &className)
	Constructor. More...

virtual	~DVCSProcessVGG99 ()
	Default destructor. More...

virtual DVCSProcessVGG99 *	clone () const
	Virtual clone function to allow the factory to clone all derived members object stored in the BaseObjectRegistry. More...

Public Member Functions inherited from PARTONS::DVCSProcessModule
virtual	~DVCSProcessModule ()
	Destructor. More...

virtual std::string	toString () const
	Return a pre-formatted characters string for output visualization of class member's values. More...

virtual void	resolveObjectDependencies ()
	Because of the initialization step order of the program, objects are registered in a total random order and some objects depend on others. More...

virtual void	run ()

virtual void	configure (const ElemUtils::Parameters &parameters)
	Provides a generic method to configure all types of modules by passing a Parameters object. More...

virtual void	prepareSubModules (const std::map< std::string, BaseObjectData > &subModulesData)
	Method used in automation to prepare all the modules used by this current module and configure them recursively. More...

virtual DVCSObservableResult	compute (double beamHelicity, double beamCharge, NumA::Vector3D targetPolarization, const DVCSObservableKinematic &kinematic, const List< GPDType > &gpdType=List< GPDType >())

virtual List< GPDType >	getListOfAvailableGPDTypeForComputation () const
	Must be implemented in child class. More...

DVCSObservableResult	compute (double beamHelicity, double beamCharge, NumA::Vector3D targetPolarization, const DVCSObservableKinematic &kinematic, const List< GPDType > &gpdType, VCSSubProcessType::Type processType)
	Computes the differential cross-section. More...

virtual void	resetPreviousKinematic ()
	Reset previous kinematics. More...

bool	isPreviousCCFKinematicDifferent (const DVCSConvolCoeffFunctionKinematic &kinematic) const
	Check if this kinematics is different than the previous one. More...

DVCSScalesModule *	getScaleModule () const
	Get scale module. More...

void	setScaleModule (DVCSScalesModule *pScaleModule)
	Set scale module. More...

DVCSXiConverterModule *	getXiConverterModule () const
	Get xi converter module. More...

void	setXiConverterModule (DVCSXiConverterModule *pXiConverterModule)
	Set xi converted module. More...

DVCSConvolCoeffFunctionModule *	getConvolCoeffFunctionModule () const
	Get CCF module;. More...

void	setConvolCoeffFunctionModule (DVCSConvolCoeffFunctionModule *pConvolCoeffFunctionModule)
	Set CCF module. More...

void	setConvolCoeffFunction (const DVCSConvolCoeffFunctionKinematic &kin, const DVCSConvolCoeffFunctionResult &result)
	Set manually CFFs. More...

Public Member Functions inherited from PARTONS::ProcessModule< DVCSObservableKinematic, DVCSObservableResult >
virtual	~ProcessModule ()
	Destructor. More...

bool	isCCFModuleDependent () const
	Check if this process module depends on a CCF module. More...

void	setIsCCFModuleDependent (bool isCCFModuleDependent)
	Set if this process module depends on a CCF module. More...

Public Member Functions inherited from PARTONS::ModuleObject
	ModuleObject (const std::string &className, ChannelType::Type channelType)
	Constructor. More...

virtual	~ModuleObject ()
	Default destructor. More...

unsigned int	getReferenceModuleId () const
	Get reference module id. More...

void	setReferenceModuleId (unsigned int referenceModuleId)
	Set reference module id. More...

ChannelType::Type	getChannelType () const
	Get channel type. More...

Public Member Functions inherited from PARTONS::BaseObject
	BaseObject (const std::string &className)
	Constructor. More...

virtual	~BaseObject ()
	Default destructor. More...

void	serialize (ElemUtils::Packet &packet) const
	Used to split a complex C++ object into a concatenation of simple types. More...

void	unserialize (ElemUtils::Packet &packet)
	Used to rebuild a complex C++ object from a concatenation of simple type. More...

bool	operator< (const BaseObject &other) const
	Overload of < operator to sort BaseObject object by its indexId value. More...

const std::string &	getClassName () const

unsigned int	getObjectId () const

int	getIndexId () const

void	setIndexId (int indexId)

Static Public Attributes
static const unsigned int	classId
	Unique ID to automatically register the class in the registry. More...

Static Public Attributes inherited from PARTONS::DVCSProcessModule
static const std::string	DVCS_PROCESS_MODULE_CLASS_NAME
	Type of the module in XML automation. More...

Static Public Attributes inherited from PARTONS::ModuleObject
static const std::string	CLASS_NAME = "className"

Protected Member Functions
	DVCSProcessVGG99 (const DVCSProcessVGG99 &other)
	Copy constructor. More...

virtual void	initModule ()
	Pure virtual function that provides skeleton for module initialization. More...

virtual void	isModuleWellConfigured ()
	Pure virtual function that provides skeleton to check if the module is well initialized and configured. More...

virtual PhysicalType< double >	CrossSectionBH ()
	Bethe-Heitler differential cross section. More...

virtual PhysicalType< double >	CrossSectionVCS ()
	Virtual Compton Scattering differential cross section. More...

virtual PhysicalType< double >	CrossSectionInterf ()
	Interference differential cross section. More...

Protected Member Functions inherited from PARTONS::DVCSProcessModule
	DVCSProcessModule (const std::string &className)
	Default constructor. More...

	DVCSProcessModule (const DVCSProcessModule &other)
	Copy constructor. More...

virtual void	setKinematics (const DVCSObservableKinematic &kinematic)
	Set internal kinematics. More...

virtual void	setExperimentalConditions (double beamHelicity, double beamCharge, NumA::Vector3D targetPolarization)

void	computeConvolCoeffFunction (const DVCSObservableKinematic &kinematic, const List< GPDType > &gpdType=List< GPDType >())
	Compute CCF for a given kinematics. More...

std::complex< double >	getConvolCoeffFunctionValue (GPDType::Type gpdType)
	Gives back a previously computed Compton Form Factor. More...

Protected Member Functions inherited from PARTONS::ProcessModule< DVCSObservableKinematic, DVCSObservableResult >
	ProcessModule (const std::string &className, ChannelType::Type channelType)
	Constructor. More...

	ProcessModule (const ProcessModule &other)
	Copy constructor. More...

Protected Member Functions inherited from PARTONS::ModuleObject
	ModuleObject (const ModuleObject &other)

Protected Member Functions inherited from PARTONS::BaseObject
	BaseObject (const BaseObject &other)
	Copy constructor. More...

void	info (const std::string &functionName, const std::string &message) const
	Print info message into logger. More...

void	debug (const std::string &functionName, const std::string &message) const
	Print debug message into logger. More...

void	warn (const std::string &functionName, const std::string &message) const
	Print warning message into logger. More...

void	errorMissingParameter (const std::string &parameterName) const
	Use in automation process to throw exception when a parameter is missing from the XML scenario file. More...

Private Types
enum	SpinorOrientation { UNDEFINED = 0 , x = 1 , y = 2 , z = 3 }
	Orientation of spinor. More...

typedef NumA::VectorComplex3D	momentum3

typedef NumA::VectorComplex4D	momentum4

typedef NumA::VectorComplex4D	spinor

typedef NumA::MatrixComplex4D	spinorMatrix

Private Member Functions
void	fillInternalVariables (NumA::Vector3D targetPolarization)
	Used to fill internal variables. More...

NumA::VectorComplex4D	V4ini (std::complex< double > a, NumA::VectorComplex3D b)
	Initialize four vector from energy and momentum. More...

NumA::VectorComplex4D	spinor_pos (NumA::VectorComplex3D p, double mass, double sproj)
	Positive-energy Dirac spinor. More...

NumA::MatrixComplex4D	dirac_gamma (int mu)
	Contravariant Dirac matrices as 4 by 4 matrices in spinor space (convention Bjorken and Drell 1964). More...

NumA::MatrixComplex4D	dirac_gamma5 ()
	Gamma5 matrix. More...

double	metric (int mu, int nu)
	Metric signature. More...

NumA::VectorComplex3D	pauli (double row, double col)
	Elements of three Pauli matrices for given index element (up/left: ++, u/r:+-, d/l: -+, d/r:–). More...

NumA::VectorComplex4D	spinor_adj (NumA::VectorComplex4D a)
	Dirac adjoint. More...

std::complex< double >	spinleft_mat_spinright (NumA::VectorComplex4D l, NumA::MatrixComplex4D m, NumA::VectorComplex4D r)
	Spinor\|gamma\|spinor product. More...

NumA::MatrixComplex4D	fvec_slash (NumA::VectorComplex4D a)
	Contraction of four vector with gamma matrix. More...

std::complex< double >	V4mul (NumA::VectorComplex4D a, NumA::VectorComplex4D b)
	Contraction of two four vectors. More...

std::complex< double >	Cinv (std::complex< double > z)
	Complex number inverse. More...

NumA::VectorComplex4D	spinor_hel (momentum3 p, double hel)
	Helicity spinor for a particle with momentum, mass 0 and helicity +/-. More...

double	polar_angle (NumA::VectorComplex3D t)
	Polar angle for given vector. More...

double	azimut_angle (NumA::VectorComplex3D t)
	Azimuthal angle for given vector. More...

NumA::MatrixComplex4D	dirac_sigma (int mu, int nu)
	Contravariant tensor sigma in spinor space (convention Bjorken and Drell 1964). More...

NumA::MatrixComplex4D	unit_spinor_mat ()
	Unit spinor matrix. More...

NumA::VectorComplex3D	Vpolar (double magn, double th, double phi)
	Vector set via magnitude, polar and azimuthal angles. More...

double	antisymm_epsilon (int ka, int la, int mu, int nu)
	Antisymmetric epsilon. More...

double	CrossSectionMechanism (double beamHelicity, double beamCharge, NumA::Vector3D targetPolarization, int mechanism)
	Calculate cross section. More...

double	v_compton_doublepol_cross_inv (double leptcharge, int mechanism, double el_hel, double sp_in)
	Calculate cross section for specific helicities. More...

NumA::MatrixComplex4D	gamma_NN_vertex (int mu, NumA::VectorComplex4D q)
	Gamma_NN electromagnetic vertex. More...

std::complex< double >	AmplitudeBH (int mu, double el_hel, double sp_in, double sp_out)
	Amplitude for BH process. More...

std::complex< double >	AmplitudeDVCS (int mu, double el_hel, double sp_in, double sp_out)
	Amplitude for DVCS process. More...

std::complex< double >	J_DVCS (int mu, int nu, double sp_in, double sp_out)
	Amplitude for the reaction. More...

std::complex< double >	v_compton_t_matrix_hel (double leptcharge, int mechanism, int mu, double el_hel, double sp_in, double sp_out)
	Matrix element for the reaction. More...

double	v_compton_doublepol_sqrampl (double leptcharge, int mechanism, double el_hel, double sp_in)
	Squared amplitude for the reaction. More...

Private Attributes
double	m_target_polarization
	Target polarization. More...

double	m_target_polarizationL
	Longitudinal component of target polarization. More...

double	m_target_polarizationT
	Transverse component of target polarization. More...

double	m_target_polarizationT_x
	Transverse x component of target polarization. More...

double	m_target_polarizationT_y
	Transverse y component of target polarization. More...

SpinorOrientation	m_proton_spinor_orientation
	Orientation of target spinor. More...

double	m_nu
	Kinematic variable nu. More...

double	m_y
	Kinematic variable y. More...

double	m_s
	Kinematic variable s. More...

double	m_xi
	Kinematic variable xi. More...

double	k_in_mom
	Momentum of incoming lepton. More...

double	k_out_mom
	Momentum of outgoing lepton. More...

double	q_in_mom
	Momentum of incoming photon. More...

double	q_out_mom
	Momentum of outgoing photon. More...

double	k_in_en
	Energy of incoming lepton. More...

double	k_out_en
	Energy of outgoing lepton. More...

double	q_in_en
	Energy of incoming photon. More...

double	q_out_en
	Energy of outgoing photon. More...

double	p_in_en
	Energy of incoming proton. More...

double	p_out_en
	Energy of outgoing proton. More...

momentum3	k_in
	Momentum vector of incoming lepton. More...

momentum3	k_out
	Momentum vector of outgoing lepton. More...

momentum3	q_in
	Momentum vector of incoming photon. More...

momentum3	q_out
	Momentum vector of outgoing photon. More...

momentum3	p_in
	Momentum vector of incoming proton. More...

momentum3	p_out
	Momentum vector of outgoing proton. More...

momentum4	k4_in
	Four vector of incomming lepton. More...

momentum4	k4_out
	Four vector of outgoing lepton. More...

momentum4	q4_in
	Four vector of incomming photon. More...

momentum4	q4_out
	Four vector of outgoing photon. More...

momentum4	p4_in
	Four vector of incomming proton. More...

momentum4	p4_out
	Four vector of outgoing proton. More...

double	an_th_q_out
	Polar angle of outgoing photon. More...

double	an_phi_q_out
	Azimuthal angle of outgoing photon. More...

Additional Inherited Members
Protected Attributes inherited from PARTONS::DVCSProcessModule
double	m_xB
	Bjorken variable. More...

double	m_t
	Mandelstam variable (square of the 4-momentum transferm in GeV2). More...

double	m_Q2
	Virtuality of the incoming photon (in GeV2). More...

double	m_E
	Beam energy in target rest frame (in GeV). More...

double	m_phi
	Angle between leptonic and hadronic plane (in radians, Trento convention). More...

double	m_beamHelicity
	Beam helicity. More...

double	m_beamCharge
	Beam charge. More...

NumA::Vector3D	m_targetPolarization
	Target polarization. More...

double	m_tmin
	Minimal value of t. More...

double	m_tmax
	Maximal value of t. More...

double	m_xBmin
	Minimal value of xB. More...

double	m_y
	Lepton energy fraction. More...

double	m_epsilon
	\( \epsilon = \frac{2 x_B M}{Q} \). More...

DVCSScalesModule *	m_pScaleModule
	Pointer to the underlying scale module. More...

DVCSXiConverterModule *	m_pXiConverterModule
	Pointer to the underlying xi converter module. More...

DVCSConvolCoeffFunctionModule *	m_pConvolCoeffFunctionModule
	Pointer to the underlying CCF module. More...

DVCSConvolCoeffFunctionResult	m_dvcsConvolCoeffFunctionResult
	Stored Compton Form Factor result. More...

DVCSConvolCoeffFunctionKinematic	m_lastCCFKinematics
	Last Compton Form Factor kinematics. More...

Protected Attributes inherited from PARTONS::ProcessModule< DVCSObservableKinematic, DVCSObservableResult >
bool	m_isCCFModuleDependent
	Boolean (true if this Process module depends on a CCF module). More...

Protected Attributes inherited from PARTONS::ModuleObject
ModuleObjectFactory *	m_pModuleObjectFactory
	Pointer tp module object factory. More...

Detailed Description

VGG process model for DVCS.

For the reference see:

Prog. Part. Nucl. Phys. 47, 401 (2001)
Phys. Rev. Lett. 80 5064 (1998).
Phys. Rev. D 60, 094017 (1999).
Phys. Rev. D 72, 054013 (2005).

Module based on the original code received from M. Guidal as a private communication.

Member Typedef Documentation

◆ momentum3

typedef NumA::VectorComplex3D PARTONS::DVCSProcessVGG99::momentum3

private

◆ momentum4

typedef NumA::VectorComplex4D PARTONS::DVCSProcessVGG99::momentum4

private

◆ spinor

typedef NumA::VectorComplex4D PARTONS::DVCSProcessVGG99::spinor

private

◆ spinorMatrix

typedef NumA::MatrixComplex4D PARTONS::DVCSProcessVGG99::spinorMatrix

private

Member Enumeration Documentation

◆ SpinorOrientation

enum PARTONS::DVCSProcessVGG99::SpinorOrientation

private

Orientation of spinor.

Enumerator
UNDEFINED
x
y
z

Constructor & Destructor Documentation

◆ DVCSProcessVGG99() [1/2]

PARTONS::DVCSProcessVGG99::DVCSProcessVGG99 ( const std::string & className )

Constructor.

See BaseObject::BaseObject and ModuleObject::ModuleObject for more details.

Parameters

className name of child class.

◆ ~DVCSProcessVGG99()

PARTONS::DVCSProcessVGG99::~DVCSProcessVGG99 ( )

virtual

Default destructor.

◆ DVCSProcessVGG99() [2/2]

PARTONS::DVCSProcessVGG99::DVCSProcessVGG99 ( const DVCSProcessVGG99 & other )

protected

Copy constructor.

Parameters

other Object to be copied.

Member Function Documentation

◆ AmplitudeBH()

std::complex< double > PARTONS::DVCSProcessVGG99::AmplitudeBH	(	int	mu,
		double	el_hel,
		double	sp_in,
		double	sp_out
	)

private

Amplitude for BH process.

Parameters

mu	Dimension index.
el_hel	Beam helicity.
sp_in	Target helicity (incoming proton).
sp_out	(outgoing proton).

◆ AmplitudeDVCS()

std::complex< double > PARTONS::DVCSProcessVGG99::AmplitudeDVCS	(	int	mu,
		double	el_hel,
		double	sp_in,
		double	sp_out
	)

private

Amplitude for DVCS process.

Parameters

mu	Dimension index.
el_hel	Beam helicity.
sp_in	Target helicity (incoming proton).
sp_out	(outgoing proton).

◆ antisymm_epsilon()

double PARTONS::DVCSProcessVGG99::antisymm_epsilon	(	int	ka,
		int	la,
		int	mu,
		int	nu
	)

private

Antisymmetric epsilon.

Parameters

ka,la,mu,nu Indices.

◆ azimut_angle()

double PARTONS::DVCSProcessVGG99::azimut_angle ( NumA::VectorComplex3D t )

private

Azimuthal angle for given vector.

Parameters

t	Input vector.

◆ Cinv()

std::complex< double > PARTONS::DVCSProcessVGG99::Cinv ( std::complex< double > z )

private

Complex number inverse.

Parameters

z	Complex number to be inverted.

◆ clone()

DVCSProcessVGG99 * PARTONS::DVCSProcessVGG99::clone ( ) const

virtual

Virtual clone function to allow the factory to clone all derived members object stored in the BaseObjectRegistry.

Returns

Implements PARTONS::DVCSProcessModule.

◆ CrossSectionBH()

PhysicalType< double > PARTONS::DVCSProcessVGG99::CrossSectionBH ( )

protectedvirtual

Bethe-Heitler differential cross section.

Reimplemented from PARTONS::DVCSProcessModule.

◆ CrossSectionInterf()

PhysicalType< double > PARTONS::DVCSProcessVGG99::CrossSectionInterf ( )

protectedvirtual

Interference differential cross section.

Reimplemented from PARTONS::DVCSProcessModule.

◆ CrossSectionMechanism()

double PARTONS::DVCSProcessVGG99::CrossSectionMechanism	(	double	beamHelicity,
		double	beamCharge,
		NumA::Vector3D	targetPolarization,
		int	mechanism
	)

private

Calculate cross section.

Parameters

beamHelicity	Beam helicity.
beamCharge	Beam charge.
targetPolarization	Target polarization.
mechanism	Mechanism (0 - BH, 1 - DVCS, 2 - INT).

◆ CrossSectionVCS()

PhysicalType< double > PARTONS::DVCSProcessVGG99::CrossSectionVCS ( )

protectedvirtual

Virtual Compton Scattering differential cross section.

Reimplemented from PARTONS::DVCSProcessModule.

◆ dirac_gamma()

NumA::MatrixComplex4D PARTONS::DVCSProcessVGG99::dirac_gamma ( int mu )

private

Contravariant Dirac matrices as 4 by 4 matrices in spinor space (convention Bjorken and Drell 1964).

Parameters

mu	Dimension index.

◆ dirac_gamma5()

NumA::MatrixComplex4D PARTONS::DVCSProcessVGG99::dirac_gamma5 ( )

private

Gamma5 matrix.

◆ dirac_sigma()

NumA::MatrixComplex4D PARTONS::DVCSProcessVGG99::dirac_sigma	(	int	mu,
		int	nu
	)

private

Contravariant tensor sigma in spinor space (convention Bjorken and Drell 1964).

Parameters

mu,nu Dimension indices.

◆ fillInternalVariables()

void PARTONS::DVCSProcessVGG99::fillInternalVariables ( NumA::Vector3D targetPolarization )

private

Used to fill internal variables.

◆ fvec_slash()

NumA::MatrixComplex4D PARTONS::DVCSProcessVGG99::fvec_slash ( NumA::VectorComplex4D a )

private

Contraction of four vector with gamma matrix.

Parameters

a	Input four vector.

◆ gamma_NN_vertex()

NumA::MatrixComplex4D PARTONS::DVCSProcessVGG99::gamma_NN_vertex	(	int	mu,
		NumA::VectorComplex4D	q
	)

private

Gamma_NN electromagnetic vertex.

Parameters

mu	Dimension index.
q	Four momentum of virtual photon.

◆ initModule()

void PARTONS::DVCSProcessVGG99::initModule ( )

protectedvirtual

Pure virtual function that provides skeleton for module initialization.

Children must define and override it.

Reimplemented from PARTONS::DVCSProcessModule.

◆ isModuleWellConfigured()

void PARTONS::DVCSProcessVGG99::isModuleWellConfigured ( )

protectedvirtual

Pure virtual function that provides skeleton to check if the module is well initialized and configured.

Children must define and override it.

Reimplemented from PARTONS::DVCSProcessModule.

◆ J_DVCS()

std::complex< double > PARTONS::DVCSProcessVGG99::J_DVCS	(	int	mu,
		int	nu,
		double	sp_in,
		double	sp_out
	)

private

Amplitude for the reaction.

Parameters

mu,nu	Dimension indices.
sp_in	Target helicity (incoming proton).
sp_out	(outgoing proton).

◆ metric()

double PARTONS::DVCSProcessVGG99::metric	(	int	mu,
		int	nu
	)

private

Metric signature.

Parameters

mu,nu Dimension indices.

◆ pauli()

NumA::VectorComplex3D PARTONS::DVCSProcessVGG99::pauli	(	double	row,
		double	col
	)

private

Elements of three Pauli matrices for given index element (up/left: ++, u/r:+-, d/l: -+, d/r:–).

Parameters

row	Row of matrix.
col	Column of matrix.

◆ polar_angle()

double PARTONS::DVCSProcessVGG99::polar_angle ( NumA::VectorComplex3D t )

private

Polar angle for given vector.

Parameters

t	Input vector.

◆ spinleft_mat_spinright()

std::complex< double > PARTONS::DVCSProcessVGG99::spinleft_mat_spinright	(	NumA::VectorComplex4D	l,
		NumA::MatrixComplex4D	m,
		NumA::VectorComplex4D	r
	)

private

Spinor|gamma|spinor product.

Parameters

l	Spinor left.
m	Gamma matrix.
r	Spinor right.

◆ spinor_adj()

NumA::VectorComplex4D PARTONS::DVCSProcessVGG99::spinor_adj ( NumA::VectorComplex4D a )

private

Dirac adjoint.

Parameters

a	Input dirac spinor.

◆ spinor_hel()

NumA::VectorComplex4D PARTONS::DVCSProcessVGG99::spinor_hel	(	momentum3	p,
		double	hel
	)

private

Helicity spinor for a particle with momentum, mass 0 and helicity +/-.

Parameters

p	Input momentum.
hel	Input helicity.

◆ spinor_pos()

NumA::VectorComplex4D PARTONS::DVCSProcessVGG99::spinor_pos	(	NumA::VectorComplex3D	p,
		double	mass,
		double	sproj
	)

private

Positive-energy Dirac spinor.

Parameters

p	Momentum vector.
mass	Mass.
sproj	Spin projection.

◆ unit_spinor_mat()

NumA::MatrixComplex4D PARTONS::DVCSProcessVGG99::unit_spinor_mat ( )

private

Unit spinor matrix.

◆ V4ini()

NumA::VectorComplex4D PARTONS::DVCSProcessVGG99::V4ini	(	std::complex< double >	a,
		NumA::VectorComplex3D	b
	)

private

Initialize four vector from energy and momentum.

Parameters

a	Input energy.
b	Input momentum vector.

◆ V4mul()

std::complex< double > PARTONS::DVCSProcessVGG99::V4mul	(	NumA::VectorComplex4D	a,
		NumA::VectorComplex4D	b
	)

private

Contraction of two four vectors.

Parameters

a,b	Input four vectors.

◆ v_compton_doublepol_cross_inv()

double PARTONS::DVCSProcessVGG99::v_compton_doublepol_cross_inv	(	double	leptcharge,
		int	mechanism,
		double	el_hel,
		double	sp_in
	)

private

Calculate cross section for specific helicities.

Parameters

leptcharge	Beam charge.
mechanism	Mechanism (0 - BH, 1 - DVCS, 2 - INT).
el_hel	Beam helicity.
sp_in	Target helicity.

◆ v_compton_doublepol_sqrampl()

double PARTONS::DVCSProcessVGG99::v_compton_doublepol_sqrampl	(	double	leptcharge,
		int	mechanism,
		double	el_hel,
		double	sp_in
	)

private

Squared amplitude for the reaction.

Parameters

leptcharge	Beam charge.
mechanism	Mechanism (0 - BH, 1 - DVCS, 2 - INT).
el_hel	Beam helicity.
sp_in	Target helicity.

◆ v_compton_t_matrix_hel()

std::complex< double > PARTONS::DVCSProcessVGG99::v_compton_t_matrix_hel	(	double	leptcharge,
		int	mechanism,
		int	mu,
		double	el_hel,
		double	sp_in,
		double	sp_out
	)

private

Matrix element for the reaction.

Parameters

leptcharge	Beam charge.
mechanism	Mechanism (0 - BH, 1 - DVCS, 2 - INT).
mu	Dimension index.
el_hel	Beam helicity.
sp_in	Target helicity (incoming proton).
sp_out	(outgoing proton).

◆ Vpolar()

NumA::VectorComplex3D PARTONS::DVCSProcessVGG99::Vpolar	(	double	magn,
		double	th,
		double	phi
	)

private

Vector set via magnitude, polar and azimuthal angles.

Parameters

magn	Magnitude.
th	Polar angle.
phi	Azimuthal angle.

Member Data Documentation

◆ an_phi_q_out

double PARTONS::DVCSProcessVGG99::an_phi_q_out

private

Azimuthal angle of outgoing photon.

◆ an_th_q_out

double PARTONS::DVCSProcessVGG99::an_th_q_out

private

Polar angle of outgoing photon.

◆ classId

const unsigned int PARTONS::DVCSProcessVGG99::classId

static

Initial value:

=
        BaseObjectRegistry::getInstance()->registerBaseObject(
                new DVCSProcessVGG99("DVCSProcessVGG99"))

Unique ID to automatically register the class in the registry.

◆ k4_in

momentum4 PARTONS::DVCSProcessVGG99::k4_in

private

Four vector of incomming lepton.

◆ k4_out

momentum4 PARTONS::DVCSProcessVGG99::k4_out

private

Four vector of outgoing lepton.

◆ k_in

momentum3 PARTONS::DVCSProcessVGG99::k_in

private

Momentum vector of incoming lepton.

◆ k_in_en

double PARTONS::DVCSProcessVGG99::k_in_en

private

Energy of incoming lepton.

◆ k_in_mom

double PARTONS::DVCSProcessVGG99::k_in_mom

private

Momentum of incoming lepton.

◆ k_out

momentum3 PARTONS::DVCSProcessVGG99::k_out

private

Momentum vector of outgoing lepton.

◆ k_out_en

double PARTONS::DVCSProcessVGG99::k_out_en

private

Energy of outgoing lepton.

◆ k_out_mom

double PARTONS::DVCSProcessVGG99::k_out_mom

private

Momentum of outgoing lepton.

◆ m_nu

double PARTONS::DVCSProcessVGG99::m_nu

private

Kinematic variable nu.

◆ m_proton_spinor_orientation

SpinorOrientation PARTONS::DVCSProcessVGG99::m_proton_spinor_orientation

private

Orientation of target spinor.

◆ m_s

double PARTONS::DVCSProcessVGG99::m_s

private

Kinematic variable s.

◆ m_target_polarization

double PARTONS::DVCSProcessVGG99::m_target_polarization

private

Target polarization.

◆ m_target_polarizationL

double PARTONS::DVCSProcessVGG99::m_target_polarizationL

private

Longitudinal component of target polarization.

◆ m_target_polarizationT

double PARTONS::DVCSProcessVGG99::m_target_polarizationT

private

Transverse component of target polarization.

◆ m_target_polarizationT_x

double PARTONS::DVCSProcessVGG99::m_target_polarizationT_x

private

Transverse x component of target polarization.

◆ m_target_polarizationT_y

double PARTONS::DVCSProcessVGG99::m_target_polarizationT_y

private

Transverse y component of target polarization.

◆ m_xi

double PARTONS::DVCSProcessVGG99::m_xi

private

Kinematic variable xi.

◆ m_y

double PARTONS::DVCSProcessVGG99::m_y

private

Kinematic variable y.

◆ p4_in

momentum4 PARTONS::DVCSProcessVGG99::p4_in

private

Four vector of incomming proton.

◆ p4_out

momentum4 PARTONS::DVCSProcessVGG99::p4_out

private

Four vector of outgoing proton.

◆ p_in

momentum3 PARTONS::DVCSProcessVGG99::p_in

private

Momentum vector of incoming proton.

◆ p_in_en

double PARTONS::DVCSProcessVGG99::p_in_en

private

Energy of incoming proton.

◆ p_out

momentum3 PARTONS::DVCSProcessVGG99::p_out

private

Momentum vector of outgoing proton.

◆ p_out_en

double PARTONS::DVCSProcessVGG99::p_out_en

private

Energy of outgoing proton.

◆ q4_in

momentum4 PARTONS::DVCSProcessVGG99::q4_in

private

Four vector of incomming photon.

◆ q4_out

momentum4 PARTONS::DVCSProcessVGG99::q4_out

private

Four vector of outgoing photon.

◆ q_in

momentum3 PARTONS::DVCSProcessVGG99::q_in

private

Momentum vector of incoming photon.

◆ q_in_en

double PARTONS::DVCSProcessVGG99::q_in_en

private

Energy of incoming photon.

◆ q_in_mom

double PARTONS::DVCSProcessVGG99::q_in_mom

private

Momentum of incoming photon.

◆ q_out

momentum3 PARTONS::DVCSProcessVGG99::q_out

private

Momentum vector of outgoing photon.

◆ q_out_en

double PARTONS::DVCSProcessVGG99::q_out_en

private

Energy of outgoing photon.

◆ q_out_mom

double PARTONS::DVCSProcessVGG99::q_out_mom

private

Momentum of outgoing photon.

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

include/partons/modules/process/DVCS/DVCSProcessVGG99.h
src/partons/modules/process/DVCS/DVCSProcessVGG99.cpp

Public Member Functions

Static Public Attributes

Protected Member Functions

Private Types

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ momentum3

◆ momentum4

◆ spinor

◆ spinorMatrix

Member Enumeration Documentation

◆ SpinorOrientation

Constructor & Destructor Documentation

◆ DVCSProcessVGG99() [1/2]

◆ ~DVCSProcessVGG99()

◆ DVCSProcessVGG99() [2/2]

Member Function Documentation

◆ AmplitudeBH()

◆ AmplitudeDVCS()

◆ antisymm_epsilon()

◆ azimut_angle()

◆ Cinv()

◆ clone()

◆ CrossSectionBH()

◆ CrossSectionInterf()

◆ CrossSectionMechanism()

◆ CrossSectionVCS()

◆ dirac_gamma()

◆ dirac_gamma5()

◆ dirac_sigma()

◆ fillInternalVariables()

◆ fvec_slash()

◆ gamma_NN_vertex()

◆ initModule()

◆ isModuleWellConfigured()

◆ J_DVCS()

◆ metric()

◆ pauli()

◆ polar_angle()

◆ spinleft_mat_spinright()

◆ spinor_adj()

◆ spinor_hel()

◆ spinor_pos()

◆ unit_spinor_mat()

◆ V4ini()

◆ V4mul()

◆ v_compton_doublepol_cross_inv()

◆ v_compton_doublepol_sqrampl()

◆ v_compton_t_matrix_hel()

◆ Vpolar()

Member Data Documentation

◆ an_phi_q_out

◆ an_th_q_out

◆ classId

◆ k4_in

◆ k4_out

◆ k_in

◆ k_in_en

◆ k_in_mom

◆ k_out

◆ k_out_en

◆ k_out_mom

◆ m_nu

◆ m_proton_spinor_orientation

◆ m_s

◆ m_target_polarization

◆ m_target_polarizationL

◆ m_target_polarizationT

◆ m_target_polarizationT_x

◆ m_target_polarizationT_y

◆ m_xi

◆ m_y

◆ p4_in

◆ p4_out

◆ p_in

◆ p_in_en

◆ p_out