ThePEG::XComb Class Reference

The XComb class stores all information about the generation of a hard sub-proces for a given pair of incoming particles, a pair of extracted partons, total parton-parton energy squared and a PartonExtractor object. More...

#include <XComb.h>

Inheritance diagram for ThePEG::XComb:

List of all members.

Public Member Functions

Standard constructors and destructors.

XComb (Energy newMaxEnergy, const cPDPair &inc, tEHPtr newEventHandler, tPExtrPtr newExtractor, tCascHdlPtr newCKKW, const PBPair &newPartonBins, tCutsPtr newCuts)

Standard constructor.

XComb ()

Default constructor.

~XComb ()

Destructor.

Access the assigned objects used in the generation.

const EventHandler & eventHandler () const

Return a reference to the corresponding collision handler.

tPExtrPtr pExtractor () const

A pointer to the parton extractor.

tCutsPtr cuts () const

A pointer to the kinematical cuts.

tCascHdlPtr CKKWHandler () const

Return a possibly null pointer to a CascadeHandler to be used for CKKW-reweighting.

Access information about incoming particles and partons.

const cPDPair & particles () const

The incoming particle types.

const cPDPair & partons () const

The incoming parton types.

const PBPair & partonBins () const

Additional information about the incoming partons.

Energy maxEnergy () const

The maximum cm energy for this process.

bool empty () const

Returns true if this XComb does not correspond to a proper subprocess generation.

Manipulate and acces information about the last selected

phase space point.

void clean ()

Reset all saved data about last generated phasespace point;.

void setPartonBinInstances (PBIPair pbis, Energy2 scale)

Set information about currently generated partons.

void prepare (const PPair &)

Prepare this XComb for producing a sub-process.

const PPair & lastParticles () const

Return the pair of incoming particle instances.

const PPair & lastPartons () const

Return the pair of incoming parton instances.

void lastPartons (PPair pp)

Set the pair of incoming parton instances.

tSubProPtr subProcess () const

Return the SubProcess object corresponding to the last generated sub-process.

void subProcess (tSubProPtr)

Set the SubProcess object corresponding to the last generated sub-process.

const PBIPair & partonBinInstances () const

Additional information about the incoming partons.

Energy2 lastS () const

The last generated total energy squared of the incoming particles.

void lastS (Energy2 s)

Set the last generated total energy squared of the incoming particles.

Energy2 lastSHat () const

The last generated total energy squared of the incoming prtons.

void lastSHat (Energy2 sh)

Set the last generated total energy squared of the incoming prtons.

double lastTau () const

lastSHat()/lastS().

double lastY () const

The last generated rapidity of the hard scattering sub-system.

void lastY (double y)

Set the last generated rapidity of the hard scattering sub-system.

double lastP1 () const

Log of one over the momentum fraction of the first incoming particle w.r.t.

double lastP2 () const

Log of one over the momentum fraction of the second incoming particle w.r.t.

void lastP1P2 (pair< double, double > pp)

Set log of one over the momentum fraction of the incoming particles w.r.t.

double lastL1 () const

Log of one over the first incoming parton momentum fraction w.r.t.

double lastL2 () const

Log of one over the second incoming parton momentum fraction w.r.t.

void lastL1L2 (pair< double, double >)

Set log of one over the incoming parton momentum fractions w.r.t.

double lastX1 () const

The first incoming parton momentum fraction w.r.t.

double lastX2 () const

The second incoming parton momentum fraction w.r.t.

void lastX1X2 (pair< double, double >)

Set the incoming parton momentum fractions w.r.t.

double lastE1 () const

Return 1-lastX1() to highest possible precision for x $\rightarrow$ 1.

double lastE2 () const

Return 1-lastX2() to highest possible precision for x $\rightarrow$ 1.

void lastE1E2 (pair< double, double >)

Set one minus the incoming parton momentum fractions w.r.t.

Energy2 lastScale () const

Get the last chosen scale of the hard scattering.

void lastScale (Energy2 Q2)

Set the last chosen scale of the hard scattering.

double lastAlphaS () const

Get the $\alpha_S$ used in the hard scattering.

void lastAlphaS (double a)

Set the $\alpha_S$ used in the hard scattering.

double lastAlphaEM () const

Get the $\alpha_{EM}$ used in the hard scattering.

void lastAlphaEM (double a)

Set the $\alpha_{EM}$ used in the hard scattering.

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 setPartonBinInfo ()

Set the local parton bin info objects for this XComb.

void createPartonBinInstances ()

Create PartonBinInstance objects for this XComb.

Private Member Functions

XComb & operator= (const XComb &)

Private and non-existent assignment operator.

Private Attributes

tEHPtr theEventHandler

The corresponding collision handler.

tPExtrPtr thePartonExtractor

A pointer to the parton extractor.

tCascHdlPtr theCKKW

A pointer to a CascadeHandler to be used for CKKW-reweighting.

tCutsPtr theCuts

A pointer to the kinematical cuts used.

cPDPair theParticles

The incoming particle types.

cPDPair thePartons

The incoming parton types.

PBPair thePartonBins

Additional information about the incoming partons.

PBPair theParticleBins

Additional information about the origins of the incoming partons.

PBIPair thePartonBinInstances

Additional information about the incoming partons.

PPair theLastParticles

The pair of incoming particle instances.

PPair theLastPartons

The pair of incoming parton instances.

Energy2 theLastS

The last generated total energy squared of the incoming particles.

Energy2 theLastSHat

The last generated total energy squared of the incoming prtons.

double theLastY

The last rapidity of the sub process, log(x1/x2)/2.

DPair theLastP1P2

Log of one over the momentum fraction of the incoming particles.

DPair theLastL1L2

Log of one over the incoming partons momentum fraction wrt.

DPair theLastX1X2

The incoming partons momentum fraction wrt.

DPair theLastE1E2

1-lastX1() and 1-lastX2() to highest possible precision for x $\rightarrow$ 1.

Energy2 theLastScale

The last chosen scale of the hard scattering.

double theLastAlphaS

The $\alpha_S$ used in the hard scattering.

double theLastAlphaEM

The $\alpha_{EM}$ used in the hard scattering.

Energy theMaxEnergy

The maximum cm energy for this process.

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.

SubProPtr theSub

The SubProcess object corresponding to the last generated sub-process.

Static Private Attributes

static ClassDescription< XComb > initXComb

Describe a concrete class with persistent data.

Detailed Description

The XComb class stores all information about the generation of a hard sub-proces for a given pair of incoming particles, a pair of extracted partons, total parton-parton energy squared and a PartonExtractor object.

When an event is generated, the objects used in the generation can be assigned an XComb object for easy acces to the corresponding information. To facilitate this, the corresponding classes inherits from the LastXCombInfo class which provides the relefant access functions.

See also:

PartonExtractor

Cuts

LastXCombInfo

Definition at line 42 of file XComb.h.

Member Function Documentation

bool ThePEG::XComb::empty ( ) const [inline]

Returns true if this XComb does not correspond to a proper subprocess generation.

I.e. if we are only generating a partial event and the incoming particles and partons are not used explicitly.

Definition at line 120 of file XComb.h.

References theEventHandler.

double ThePEG::XComb::lastP1 ( ) const [inline]

Log of one over the momentum fraction of the first incoming particle w.r.t.

the maximum allowed energy.

Definition at line 215 of file XComb.h.

References theLastP1P2.

double ThePEG::XComb::lastP2 ( ) const [inline]

Log of one over the momentum fraction of the second incoming particle w.r.t.

the maximum allowed energy.

Definition at line 221 of file XComb.h.

References theLastP1P2.

void ThePEG::XComb::lastP1P2 ( pair< double, double > pp ) [inline]

Set log of one over the momentum fraction of the incoming particles w.r.t.

the maximum allowed energy.

Definition at line 227 of file XComb.h.

References theLastP1P2.

double ThePEG::XComb::lastL1 ( ) const [inline]

Log of one over the first incoming parton momentum fraction w.r.t.

the first incoming particle.

Definition at line 233 of file XComb.h.

References theLastL1L2.

double ThePEG::XComb::lastL2 ( ) const [inline]

Log of one over the second incoming parton momentum fraction w.r.t.

the second incoming particle.

Definition at line 239 of file XComb.h.

References theLastL1L2.

void ThePEG::XComb::lastL1L2 ( pair< double, double > )

Set log of one over the incoming parton momentum fractions w.r.t.

the incoming particles.

double ThePEG::XComb::lastX1 ( ) const [inline]

The first incoming parton momentum fraction w.r.t.

the first incoming particle.

Definition at line 251 of file XComb.h.

References theLastX1X2.

double ThePEG::XComb::lastX2 ( ) const [inline]

The second incoming parton momentum fraction w.r.t.

the second incoming particle.

Definition at line 257 of file XComb.h.

References theLastX1X2.

void ThePEG::XComb::lastX1X2 ( pair< double, double > )

Set the incoming parton momentum fractions w.r.t.

the incoming particles.

void ThePEG::XComb::lastE1E2 ( pair< double, double > )

Set one minus the incoming parton momentum fractions w.r.t.

the incoming particles.

double ThePEG::XComb::lastAlphaS ( ) const [inline]

Get the $\alpha_S$ used in the hard scattering.

Is negative if no value has been set.

Definition at line 297 of file XComb.h.

References theLastAlphaS.

double ThePEG::XComb::lastAlphaEM ( ) const [inline]

Get the $\alpha_{EM}$ used in the hard scattering.

Is negative if no value has been set.

Definition at line 308 of file XComb.h.

References theLastAlphaEM.

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

Function used to write out object persistently.

Parameters:

os

the persistent output stream written to.

Reimplemented in ThePEG::StandardXComb.

void ThePEG::XComb::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 in ThePEG::StandardXComb.

Member Data Documentation

DPair ThePEG::XComb::theLastL1L2 [private]

Log of one over the incoming partons momentum fraction wrt.

the incoming particles.

Definition at line 432 of file XComb.h.

Referenced by lastL1(), and lastL2().

DPair ThePEG::XComb::theLastX1X2 [private]

The incoming partons momentum fraction wrt.

the incoming particles.

Definition at line 438 of file XComb.h.

Referenced by lastX1(), and lastX2().

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

XComb.h


Public Member Functions
Standard constructors and destructors.
	XComb (Energy newMaxEnergy, const cPDPair &inc, tEHPtr newEventHandler, tPExtrPtr newExtractor, tCascHdlPtr newCKKW, const PBPair &newPartonBins, tCutsPtr newCuts)
	Standard constructor.
	XComb ()
	Default constructor.
	~XComb ()
	Destructor.
Access the assigned objects used in the generation.
const EventHandler &	eventHandler () const
	Return a reference to the corresponding collision handler.
tPExtrPtr	pExtractor () const
	A pointer to the parton extractor.
tCutsPtr	cuts () const
	A pointer to the kinematical cuts.
tCascHdlPtr	CKKWHandler () const
	Return a possibly null pointer to a CascadeHandler to be used for CKKW-reweighting.
Access information about incoming particles and partons.
const cPDPair &	particles () const
	The incoming particle types.
const cPDPair &	partons () const
	The incoming parton types.
const PBPair &	partonBins () const
	Additional information about the incoming partons.
Energy	maxEnergy () const
	The maximum cm energy for this process.
bool	empty () const
	Returns true if this XComb does not correspond to a proper subprocess generation.
Manipulate and acces information about the last selected
phase space point.
void	clean ()
	Reset all saved data about last generated phasespace point;.
void	setPartonBinInstances (PBIPair pbis, Energy2 scale)
	Set information about currently generated partons.
void	prepare (const PPair &)
	Prepare this XComb for producing a sub-process.
const PPair &	lastParticles () const
	Return the pair of incoming particle instances.
const PPair &	lastPartons () const
	Return the pair of incoming parton instances.
void	lastPartons (PPair pp)
	Set the pair of incoming parton instances.
tSubProPtr	subProcess () const
	Return the SubProcess object corresponding to the last generated sub-process.
void	subProcess (tSubProPtr)
	Set the SubProcess object corresponding to the last generated sub-process.
const PBIPair &	partonBinInstances () const
	Additional information about the incoming partons.
Energy2	lastS () const
	The last generated total energy squared of the incoming particles.
void	lastS (Energy2 s)
	Set the last generated total energy squared of the incoming particles.
Energy2	lastSHat () const
	The last generated total energy squared of the incoming prtons.
void	lastSHat (Energy2 sh)
	Set the last generated total energy squared of the incoming prtons.
double	lastTau () const
	lastSHat()/lastS().
double	lastY () const
	The last generated rapidity of the hard scattering sub-system.
void	lastY (double y)
	Set the last generated rapidity of the hard scattering sub-system.
double	lastP1 () const
	Log of one over the momentum fraction of the first incoming particle w.r.t.
double	lastP2 () const
	Log of one over the momentum fraction of the second incoming particle w.r.t.
void	lastP1P2 (pair< double, double > pp)
	Set log of one over the momentum fraction of the incoming particles w.r.t.
double	lastL1 () const
	Log of one over the first incoming parton momentum fraction w.r.t.
double	lastL2 () const
	Log of one over the second incoming parton momentum fraction w.r.t.
void	lastL1L2 (pair< double, double >)
	Set log of one over the incoming parton momentum fractions w.r.t.
double	lastX1 () const
	The first incoming parton momentum fraction w.r.t.
double	lastX2 () const
	The second incoming parton momentum fraction w.r.t.
void	lastX1X2 (pair< double, double >)
	Set the incoming parton momentum fractions w.r.t.
double	lastE1 () const
	Return 1-lastX1() to highest possible precision for x $\rightarrow$ 1.
double	lastE2 () const
	Return 1-lastX2() to highest possible precision for x $\rightarrow$ 1.
void	lastE1E2 (pair< double, double >)
	Set one minus the incoming parton momentum fractions w.r.t.
Energy2	lastScale () const
	Get the last chosen scale of the hard scattering.
void	lastScale (Energy2 Q2)
	Set the last chosen scale of the hard scattering.
double	lastAlphaS () const
	Get the $\alpha_S$ used in the hard scattering.
void	lastAlphaS (double a)
	Set the $\alpha_S$ used in the hard scattering.
double	lastAlphaEM () const
	Get the $\alpha_{EM}$ used in the hard scattering.
void	lastAlphaEM (double a)
	Set the $\alpha_{EM}$ used in the hard scattering.
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	setPartonBinInfo ()
	Set the local parton bin info objects for this XComb.
void	createPartonBinInstances ()
	Create PartonBinInstance objects for this XComb.
Private Member Functions
XComb &	operator= (const XComb &)
	Private and non-existent assignment operator.
Private Attributes
tEHPtr	theEventHandler
	The corresponding collision handler.
tPExtrPtr	thePartonExtractor
	A pointer to the parton extractor.
tCascHdlPtr	theCKKW
	A pointer to a CascadeHandler to be used for CKKW-reweighting.
tCutsPtr	theCuts
	A pointer to the kinematical cuts used.
cPDPair	theParticles
	The incoming particle types.
cPDPair	thePartons
	The incoming parton types.
PBPair	thePartonBins
	Additional information about the incoming partons.
PBPair	theParticleBins
	Additional information about the origins of the incoming partons.
PBIPair	thePartonBinInstances
	Additional information about the incoming partons.
PPair	theLastParticles
	The pair of incoming particle instances.
PPair	theLastPartons
	The pair of incoming parton instances.
Energy2	theLastS
	The last generated total energy squared of the incoming particles.
Energy2	theLastSHat
	The last generated total energy squared of the incoming prtons.
double	theLastY
	The last rapidity of the sub process, log(x1/x2)/2.
DPair	theLastP1P2
	Log of one over the momentum fraction of the incoming particles.
DPair	theLastL1L2
	Log of one over the incoming partons momentum fraction wrt.
DPair	theLastX1X2
	The incoming partons momentum fraction wrt.
DPair	theLastE1E2
	1-lastX1() and 1-lastX2() to highest possible precision for x $\rightarrow$ 1.
Energy2	theLastScale
	The last chosen scale of the hard scattering.
double	theLastAlphaS
	The $\alpha_S$ used in the hard scattering.
double	theLastAlphaEM
	The $\alpha_{EM}$ used in the hard scattering.
Energy	theMaxEnergy
	The maximum cm energy for this process.
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.
SubProPtr	theSub
	The SubProcess object corresponding to the last generated sub-process.
Static Private Attributes
static ClassDescription< XComb >	initXComb
	Describe a concrete class with persistent data.