DiagramBase is the base class of all classes which describes Feynman diagrams which can be generated by a matrix element class inheriting from MEBase, as reported by the MEBase::includedDiagrams() method. More...

#include <DiagramBase.h>

Inheritance diagram for ThePEG::DiagramBase:

[legend]

Public Member Functions
Standard constructors and destructors.
	DiagramBase ()
	Default constructor.

virtual	~DiagramBase ()
	Destructor.

Main virtual function to be overridden in sub-classes.
virtual tPVector	construct (SubProPtr sb, const StandardXComb &, const ColourLines &) const =0
	Construct a sub process corresponding to this diagram.

Public Member Functions inherited from ThePEG::Base
virtual	~Base ()
	The virtual destructor.

void	debug () const
	Print out debugging information for this object on std::cerr.

virtual void	debugme () const
	Print out debugging information for this object on std::cerr.

Public Member Functions inherited from ThePEG::Pointer::ReferenceCounted
CounterType	referenceCount () const
	Return the reference count.

Functions used by the persistent I/O system.
int	theNIncoming
	The number of incoming partons for this diagram.

cPDVector	thePartons
	The incoming, followed by the outgoing partons for this diagram.

int	theId
	The id number of this diagram.

static AbstractClassDescription< DiagramBase >	initDiagramBase
	Describe an abstract base class with persistent data.

void	persistentOutput (PersistentOStream &os) const
	Function used to write out object persistently.

void	persistentInput (PersistentIStream &is, int version)
	Function used to read in object persistently.

static void	Init ()
	Standard Init function.

DiagramBase &	operator= (const DiagramBase &)=delete
	Private and non-existent assignment operator.

Access the underlying information.
int	nIncoming () const
	Return the number of incoming partons for this diagram.

const cPDVector &	partons () const
	Return the incoming, followed by the outgoing partons for this diagram.

int	id () const
	Return the id number of this diagram.

string	getTag () const
	Generate a tag which is unique for diagrams with the same type of incoming and outgoing partons.

virtual bool	isSame (tcDiagPtr other) const
	Compare this diagram to another one modulo the ids of the diagrams.

void	partons (int ninc, const cPDVector &parts, int newId)
	To be used by sub classes to report the incoming and outgoing particle types, and an id number.

void	diagramInfo (int ninc, int newId)
	Complete the missing information, provided partons() has already been filled.

bool	done () const
	Returns true if the partons(int, const cPDVector &, int) function has been called properly from the sub class.

void	addParton (tcPDPtr pd)
	Add to the partons.

Additional Inherited Members
Public Types inherited from ThePEG::Pointer::ReferenceCounted
typedef unsigned int	CounterType
	The integer type used for counting.

Static Public Member Functions inherited from ThePEG::Base
static void	Init ()
	The standard Init function used to initialize the interfaces.

Public Attributes inherited from ThePEG::Pointer::ReferenceCounted
const unsigned long	uniqueId
	The unique ID.

Protected Member Functions inherited from ThePEG::Pointer::ReferenceCounted
	ReferenceCounted ()
	Default constructor.

	ReferenceCounted (const ReferenceCounted &)
	Copy-constructor.

ReferenceCounted &	operator= (const ReferenceCounted &)
	Assignment.

Detailed Description

DiagramBase is the base class of all classes which describes Feynman diagrams which can be generated by a matrix element class inheriting from MEBase, as reported by the MEBase::includedDiagrams() method.

To work properly, a sub-class must in its constructor report the incoming and outgoing parton types with the partons(int, const cPDVector &, int) method. Also an id number should be given to be used internally by the matrix element class. In addition, the construct() method must be implemented to construct the actual partons and connect them together in a SubProcess object, also performing the colour connections using a given ColourLines object.

See also: MEBase; SubProcess; ColourLines

Definition at line 41 of file DiagramBase.h.

Constructor & Destructor Documentation

◆ DiagramBase()

ThePEG::DiagramBase::DiagramBase ( )

inline

Default constructor.

Definition at line 50 of file DiagramBase.h.

Member Function Documentation

◆ addParton()

void ThePEG::DiagramBase::addParton ( tcPDPtr pd )

inlineprotected

Add to the partons.

Definition at line 147 of file DiagramBase.h.

References thePartons.

Referenced by ThePEG::BlobDiagram::BlobDiagram(), and ThePEG::BlobDiagram::operator,().

◆ construct()

virtual tPVector ThePEG::DiagramBase::construct	(	SubProPtr	sb,
		const StandardXComb &	,
		const ColourLines &
	)		const

pure virtual

Construct a sub process corresponding to this diagram.

The incoming partons, and the momenta of the outgoing ones, are given by the XComb object. All parent/children pointers should be set correspondingly and the partons should be colour connected as specified by the ColourLines object.

Implemented in ThePEG::BlobDiagram, and ThePEG::Tree2toNDiagram.

◆ diagramInfo()

void ThePEG::DiagramBase::diagramInfo	(	int	ninc,
		int	newId
	)

inlineprotected

Complete the missing information, provided partons() has already been filled.

Definition at line 133 of file DiagramBase.h.

References theId, and theNIncoming.

Referenced by ThePEG::BlobDiagram::BlobDiagram().

◆ done()

bool ThePEG::DiagramBase::done ( ) const

inlineprotected

Returns true if the partons(int, const cPDVector &, int) function has been called properly from the sub class.

Definition at line 142 of file DiagramBase.h.

References nIncoming().

◆ id()

int ThePEG::DiagramBase::id ( ) const

inline

Return the id number of this diagram.

Definition at line 90 of file DiagramBase.h.

References theId.

◆ isSame()

virtual bool ThePEG::DiagramBase::isSame ( tcDiagPtr other ) const

inlinevirtual

Compare this diagram to another one modulo the ids of the diagrams.

Reimplemented in ThePEG::Tree2toNDiagram.

Definition at line 102 of file DiagramBase.h.

References nIncoming(), and partons().

◆ nIncoming()

int ThePEG::DiagramBase::nIncoming ( ) const

inline

Return the number of incoming partons for this diagram.

I.e. the incoming partons plus the number of space-like lines.

Definition at line 79 of file DiagramBase.h.

References theNIncoming.

Referenced by done(), and isSame().

◆ partons() [1/2]

const cPDVector & ThePEG::DiagramBase::partons ( ) const

inline

Return the incoming, followed by the outgoing partons for this diagram.

Definition at line 85 of file DiagramBase.h.

References thePartons.

Referenced by ThePEG::BlobDiagram::external(), ThePEG::BlobDiagram::incoming(), isSame(), ThePEG::BlobDiagram::nOutgoing(), and ThePEG::BlobDiagram::outgoing().

◆ partons() [2/2]

void ThePEG::DiagramBase::partons	(	int	ninc,
		const cPDVector &	parts,
		int	newId
	)

inlineprotected

To be used by sub classes to report the incoming and outgoing particle types, and an id number.

Parameters

ninc	the number of incoming and other space-like lines in the diagram.
parts	the types of partons for each external line in the diagram.
newId	the id number of this diagram.

Definition at line 123 of file DiagramBase.h.

References theId, theNIncoming, and thePartons.

◆ persistentInput()

void ThePEG::DiagramBase::persistentInput	(	PersistentIStream &	is,
		int	version
	)

Function used to read in object persistently.

Parameters

is	the persistent input stream read from.
version	the version number of the object when written.

◆ persistentOutput()

void ThePEG::DiagramBase::persistentOutput ( PersistentOStream & os ) const

Function used to write out object persistently.

Parameters

os	the persistent output stream written to.

Member Data Documentation

◆ initDiagramBase

AbstractClassDescription<DiagramBase> ThePEG::DiagramBase::initDiagramBase

staticprivate

Describe an abstract base class with persistent data.

Definition at line 195 of file DiagramBase.h.

◆ theId

int ThePEG::DiagramBase::theId

private

The id number of this diagram.

Definition at line 188 of file DiagramBase.h.

Referenced by diagramInfo(), id(), and partons().

◆ theNIncoming

int ThePEG::DiagramBase::theNIncoming

private

The number of incoming partons for this diagram.

Definition at line 177 of file DiagramBase.h.

Referenced by diagramInfo(), nIncoming(), and partons().

◆ thePartons

cPDVector ThePEG::DiagramBase::thePartons

private

The incoming, followed by the outgoing partons for this diagram.

Definition at line 183 of file DiagramBase.h.

Referenced by addParton(), and partons().

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

DiagramBase.h

Public Member Functions

Functions used by the persistent I/O system.

Access the underlying information.

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ DiagramBase()

Member Function Documentation

◆ addParton()

◆ construct()

◆ diagramInfo()

◆ done()

◆ id()

◆ isSame()

◆ nIncoming()

◆ partons() [1/2]

◆ partons() [2/2]

◆ persistentInput()

◆ persistentOutput()

Member Data Documentation

◆ initDiagramBase

◆ theId

◆ theNIncoming

◆ thePartons