ThePEG::StandardXComb Class Reference

The StandardXComb class inherits from the more general XComb class which stores all information about the generation of a hard sub-proces for a given pair of incoming particles, a pair of extracted partons, etc. More...

#include <StandardXComb.h>

Inheritance diagram for ThePEG::StandardXComb:

List of all members.

Public Types

typedef MEBase::DiagramVector DiagramVector

A vector of DiagramBase objects.

typedef MEBase::DiagramIndex DiagramIndex

A vector of indices.

Public Member Functions

Standard constructors and destructors.

StandardXComb (Energy newMaxEnergy, const cPDPair &inc, tEHPtr newEventHandler, tSubHdlPtr newSubProcessHandler, tPExtrPtr newExtractor, tCascHdlPtr newCKKW, const PBPair &newPartonBins, tCutsPtr newCuts, tMEPtr newME, const DiagramVector &newDiagrams, bool mir)

Standard constructor.

StandardXComb ()

Default constructor.

~StandardXComb ()

Destructor.

StandardXComb (tMEPtr me, const tPVector &parts, DiagramIndex i)

Constructor used by MEBase to create a temporary object to store info.

Access the assigned objects used in the generation.

tcSubHdlPtr subProcessHandler () const

Return a pointer to the corresponding sub-process handler.

tMEPtr matrixElement () const

The matrix element to be used.

Main functions used for the generation.

virtual bool checkInit ()

Try to determine if this subprocess is at all possible.

int nDim () const

The number of dimensions of the phase space used to generate this process.

CrossSection dSigDR (const pair< double, double > ll, int nr, const double *r)

Generate a phase space point from a vector r of nr numbers in the interval ]0,1[ and return the corresponding differential cross section.

tSubProPtr construct ()

Construct a sub-process object from the information available.

Functions used for collecting statistics.

const XSecStat & stats () const

The statistics object for this XComb.

void select (double weight)

Select the current event.

void accept ()

Accept the current event assuming it was previously selcted.

void reject (double weight=1.0)

Reject the current event assuming it was previously accepted.

void reset ()

Reset statistics.

Access information used by the MEBase object.

const DiagramVector & diagrams () const

The diagrams used by the matrix element.

bool mirror () const

True if the TreeDiagram's for this matrix element should in fact be mirrored before used to create an actual sub-rocess.

const vector< Lorentz5Momentum > & meMomenta () const

Return the momenta of the partons to be used by the matrix element object, in the order specified by the TreeDiagram objects given by the matrix element.

tcDiagPtr lastDiagram () const

Return the last selected diagram.

const cPDVector & mePartonData () const

Return the parton types to be used by the matrix element object, in the order specified by the TreeDiagram objects given by the matrix element.

DiagramIndex lastDiagramIndex () const

Return the index of the last selected diagram.

const DVector & meInfo () const

Get information saved by the matrix element in the calculation of the cross section to be used later when selecting diagrams and colour flow.

void meInfo (const DVector &info)

Set information saved by the matrix element in the calculation of the cross section to be used later when selecting diagrams and colour flow.

Functions used by the persistent I/O system.

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 Public Member Functions

static void Init ()

Standard Init function used to initialize the interface.

Protected Member Functions

void newSubProcess ()

Construct the corresponding SubProcess object if it hasn't been done before.

vector< Lorentz5Momentum > & meMomenta ()

Return the momenta of the partons to be used by the matrix element object, in the order specified by the TreeDiagram objects given by the matrix element.

cPDVector & mePartonData ()

Return the parton types to be used by the matrix element object, in the order specified by the TreeDiagram objects given by the matrix element.

void lastDiagramIndex (DiagramIndex i)

Set the last selected diagram.

Private Member Functions

StandardXComb & operator= (const StandardXComb &)

Private and non-existent assignment operator.

Private Attributes

tSubHdlPtr theSubProcessHandler

The corresponding sub-process handler.

tMEPtr theME

The matrix element to be used.

XSecStat theStats

Statistics gathering for this XComb.

DiagramVector theDiagrams

The diagrams used by the matrix element.

bool isMirror

True if the TreeDiagram's for this matrix element should in fact be mirrored before used to create an actual sub-rocess.

int theNDim

The number of dimensions of the phase space used to generate this process.

pair< int, int > partonDims

The number of dimensions of the phase space used for each of the incoming partons.

vector< Lorentz5Momentum > theMEMomenta

The momenta of the partons to be used by the matrix element object, in the order specified by the TreeDiagram objects given by the matrix element.

cPDVector theMEPartonData

The parton types to be used by the matrix element object, in the order specified by the TreeDiagram objects given by the matrix element.

DiagramIndex theLastDiagramIndex

The last selected tree diagram.

DVector theMEInfo

Information saved by the matrix element in the calculation of the cross section to be used later when selecting diagrams and colour flow.

Static Private Attributes

static ClassDescription
< StandardXComb > initStandardXComb

Describe a concrete class with persistent data.

Friends

class MEBase

MEBase needs to be a friend.

Detailed Description

The StandardXComb class inherits from the more general XComb class which stores all information about the generation of a hard sub-proces for a given pair of incoming particles, a pair of extracted partons, etc.

This class stores more information related to thestandard process generation scheme in ThePEG, such as the PartonExtractor and MEBase object used. It also does some of the administration of the process generation.

The main function is dSigDR() which returns the differential cross section w.r.t. a given vector of random numbers in the interval ]0,1[. In the initialization this is used to pre-sample the phase space. In the generation phase it is used to give the cross section for a phase space point, and if this StandardXComb is chosen the construct() function is called to generate the actual sub-process.

See also:

ParonExtractor

MEBase

Cuts

Definition at line 51 of file StandardXComb.h.

Member Typedef Documentation

typedef MEBase::DiagramVector ThePEG::StandardXComb::DiagramVector

A vector of DiagramBase objects.

Definition at line 56 of file StandardXComb.h.

typedef MEBase::DiagramIndex ThePEG::StandardXComb::DiagramIndex

A vector of indices.

Definition at line 59 of file StandardXComb.h.

Member Function Documentation

tcSubHdlPtr ThePEG::StandardXComb::subProcessHandler ( ) const [inline]

Return a pointer to the corresponding sub-process handler.

May be null if the standard process generation in ThePEG was not used.

Definition at line 100 of file StandardXComb.h.

References theSubProcessHandler.

void ThePEG::StandardXComb::select ( double weight ) [inline]

Select the current event.

It will later be rejected with a probability given by weight.

Definition at line 145 of file StandardXComb.h.

References ThePEG::XSecStat::select(), and theStats.

void ThePEG::StandardXComb::reject ( double weight = 1.0 ) [inline]

Reject the current event assuming it was previously accepted.

If weighted events are produced, the weight should be the same as the previous call to select(double).

Definition at line 157 of file StandardXComb.h.

References ThePEG::XSecStat::reject(), and theStats.

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

Function used to write out object persistently.

Parameters:

os

the persistent output stream written to.

Reimplemented from ThePEG::XComb.

void ThePEG::StandardXComb::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.

Reimplemented from ThePEG::XComb.

Friends And Related Function Documentation

friend class MEBase [friend]

MEBase needs to be a friend.

Definition at line 62 of file StandardXComb.h.

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

StandardXComb.h


Public Types
typedef MEBase::DiagramVector	DiagramVector
	A vector of DiagramBase objects.
typedef MEBase::DiagramIndex	DiagramIndex
	A vector of indices.
Public Member Functions
Standard constructors and destructors.
	StandardXComb (Energy newMaxEnergy, const cPDPair &inc, tEHPtr newEventHandler, tSubHdlPtr newSubProcessHandler, tPExtrPtr newExtractor, tCascHdlPtr newCKKW, const PBPair &newPartonBins, tCutsPtr newCuts, tMEPtr newME, const DiagramVector &newDiagrams, bool mir)
	Standard constructor.
	StandardXComb ()
	Default constructor.
	~StandardXComb ()
	Destructor.
	StandardXComb (tMEPtr me, const tPVector &parts, DiagramIndex i)
	Constructor used by MEBase to create a temporary object to store info.
Access the assigned objects used in the generation.
tcSubHdlPtr	subProcessHandler () const
	Return a pointer to the corresponding sub-process handler.
tMEPtr	matrixElement () const
	The matrix element to be used.
Main functions used for the generation.
virtual bool	checkInit ()
	Try to determine if this subprocess is at all possible.
int	nDim () const
	The number of dimensions of the phase space used to generate this process.
CrossSection	dSigDR (const pair< double, double > ll, int nr, const double *r)
	Generate a phase space point from a vector r of nr numbers in the interval ]0,1[ and return the corresponding differential cross section.
tSubProPtr	construct ()
	Construct a sub-process object from the information available.
Functions used for collecting statistics.
const XSecStat &	stats () const
	The statistics object for this XComb.
void	select (double weight)
	Select the current event.
void	accept ()
	Accept the current event assuming it was previously selcted.
void	reject (double weight=1.0)
	Reject the current event assuming it was previously accepted.
void	reset ()
	Reset statistics.
Access information used by the MEBase object.
const DiagramVector &	diagrams () const
	The diagrams used by the matrix element.
bool	mirror () const
	True if the TreeDiagram's for this matrix element should in fact be mirrored before used to create an actual sub-rocess.
const vector< Lorentz5Momentum > &	meMomenta () const
	Return the momenta of the partons to be used by the matrix element object, in the order specified by the TreeDiagram objects given by the matrix element.
tcDiagPtr	lastDiagram () const
	Return the last selected diagram.
const cPDVector &	mePartonData () const
	Return the parton types to be used by the matrix element object, in the order specified by the TreeDiagram objects given by the matrix element.
DiagramIndex	lastDiagramIndex () const
	Return the index of the last selected diagram.
const DVector &	meInfo () const
	Get information saved by the matrix element in the calculation of the cross section to be used later when selecting diagrams and colour flow.
void	meInfo (const DVector &info)
	Set information saved by the matrix element in the calculation of the cross section to be used later when selecting diagrams and colour flow.
Functions used by the persistent I/O system.
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 Public Member Functions
static void	Init ()
	Standard Init function used to initialize the interface.
Protected Member Functions
void	newSubProcess ()
	Construct the corresponding SubProcess object if it hasn't been done before.
vector< Lorentz5Momentum > &	meMomenta ()
	Return the momenta of the partons to be used by the matrix element object, in the order specified by the TreeDiagram objects given by the matrix element.
cPDVector &	mePartonData ()
	Return the parton types to be used by the matrix element object, in the order specified by the TreeDiagram objects given by the matrix element.
void	lastDiagramIndex (DiagramIndex i)
	Set the last selected diagram.
Private Member Functions
StandardXComb &	operator= (const StandardXComb &)
	Private and non-existent assignment operator.
Private Attributes
tSubHdlPtr	theSubProcessHandler
	The corresponding sub-process handler.
tMEPtr	theME
	The matrix element to be used.
XSecStat	theStats
	Statistics gathering for this XComb.
DiagramVector	theDiagrams
	The diagrams used by the matrix element.
bool	isMirror
	True if the TreeDiagram's for this matrix element should in fact be mirrored before used to create an actual sub-rocess.
int	theNDim
	The number of dimensions of the phase space used to generate this process.
pair< int, int >	partonDims
	The number of dimensions of the phase space used for each of the incoming partons.
vector< Lorentz5Momentum >	theMEMomenta
	The momenta of the partons to be used by the matrix element object, in the order specified by the TreeDiagram objects given by the matrix element.
cPDVector	theMEPartonData
	The parton types to be used by the matrix element object, in the order specified by the TreeDiagram objects given by the matrix element.
DiagramIndex	theLastDiagramIndex
	The last selected tree diagram.
DVector	theMEInfo
	Information saved by the matrix element in the calculation of the cross section to be used later when selecting diagrams and colour flow.
Static Private Attributes
static ClassDescription < StandardXComb >	initStandardXComb
	Describe a concrete class with persistent data.
Friends
class	MEBase
	MEBase needs to be a friend.