Herwig::QTildeMatching Class Reference

QTildeMatching implements NLO matching with the default shower. More...

#include <QTildeMatching.h>

Inheritance diagram for Herwig::QTildeMatching:

Public Member Functions
	QTildeMatching ()
	The default constructor.
virtual CrossSection	dSigHatDR () const
	Return the shower approximation to the real emission cross section for the given pair of Born and real emission configurations.
virtual double	me2 () const
	Return the shower approximation splitting kernel for the given pair of Born and real emission configurations in units of the Born center of mass energy squared, and including a weight to project onto the splitting given by the dipole used.
virtual void	checkCutoff ()
	Determine if the configuration is below or above the cutoff.
virtual void	getShowerVariables ()
	Determine all kinematic variables which are not provided by the dipole kinematics; store all shower variables in the respective dipole object for later use.
Public Member Functions inherited from Herwig::ShowerApproximation
	ShowerApproximation ()
	The default constructor.
virtual bool	needsSplittingGenerator () const
	Return true, if this shower approximation will require a splitting generator.
virtual bool	hasHEvents () const
	Return true, if this shower approximation will require H events.
virtual bool	needsTildeXCombs () const
	Return true, if this shower approximation will require tilde XCombs for the real phase space point generated.
virtual bool	needsTruncatedShower () const
	Return true, if this shower approximation will require a truncated parton shower.
virtual Ptr< TildeKinematics >::tptr	showerTildeKinematics () const
	Return the tilde kinematics object returning the shower kinematics parametrization if different from the nominal dipole mappings.
virtual Ptr< InvertedTildeKinematics >::tptr	showerInvertedTildeKinematics () const
	Return the tilde kinematics object returning the shower kinematics parametrization if different from the nominal dipole mappings.
void	setBornXComb (tStdXCombPtr xc)
	Set the XComb object describing the Born process.
tStdXCombPtr	bornXComb () const
	Return the XComb object describing the Born process.
tcStdXCombPtr	bornCXComb () const
	Return the XComb object describing the Born process.
void	setRealXComb (tStdXCombPtr xc)
	Set the XComb object describing the real emission process.
tStdXCombPtr	realXComb () const
	Return the XComb object describing the real emission process.
tcStdXCombPtr	realCXComb () const
	Return the XComb object describing the real emission process.
void	setTildeXCombs (const vector< StdXCombPtr > &xc)
	Set the tilde xcomb objects associated to the real xcomb.
const vector< StdXCombPtr > &	tildeXCombs () const
	Return the tilde xcomb objects associated to the real xcomb.
void	setDipole (Ptr< SubtractionDipole >::tptr)
	Set the dipole in charge for the emission.
Ptr< SubtractionDipole >::tptr	dipole () const
	Return the dipole in charge for the emission.
virtual bool	hasSpinCorrelations () const
	Return true, if this matching is capable of spin correlations.
bool	belowCutoff () const
	Return true if one of the recently encountered configutations was below the infrared cutoff.
void	wasBelowCutoff ()
	Indicate that one of the recently encountered configutations was below the infrared cutoff.
void	resetBelowCutoff ()
	Reset the below cutoff flag.
Energy	ffPtCut () const
	Return the pt cut to be applied for final-final dipoles.
Energy	fiPtCut () const
	Return the pt cut to be applied for final-initial dipoles.
Energy	iiPtCut () const
	Return the pt cut to be applied for initial-initial dipoles.
Energy	safeCut () const
	Return the pt cut to be applied for initial-initial dipoles.
Energy	ffScreeningScale () const
	Return the screening scale to be applied for final-final dipoles.
Energy	fiScreeningScale () const
	Return the screening scale to be applied for final-initial dipoles.
Energy	iiScreeningScale () const
	Return the screening scale to be applied for initial-initial dipoles.
virtual Energy2	showerEmissionScale () const
	Return the shower renormalization scale.
Energy2	showerRenormalizationScale () const
	Return the shower renormalization scale.
Energy2	showerFactorizationScale () const
	Return the shower factorization scale.
Energy2	bornRenormalizationScale () const
	Return the Born renormalization scale.
Energy2	bornFactorizationScale () const
	Return the Born factorization scale.
Energy2	realRenormalizationScale () const
	Return the real emission renormalization scale.
Energy2	realFactorizationScale () const
	Return the real emission factorization scale.
int	realEmissionScaleInSubtraction () const
	Return the scale choice in the real emission cross section to be used in the matching subtraction.
int	bornScaleInSubtraction () const
	Return the scale choice in the born cross section to be used in the matching subtraction.
int	emissionScaleInSubtraction () const
	Return the scale choice in the emission contribution to be used in the matching subtraction.
int	realEmissionScaleInSplitting () const
	Return the scale choice in the real emission cross section to be used in the splitting.
int	bornScaleInSplitting () const
	Return the scale choice in the born cross section to be used in the splitting.
int	emissionScaleInSplitting () const
	Return the scale choice in the emission contribution to be used in the splitting.
double	scaleWeight (int rScale, int bScale, int eScale) const
	Return the scale weight.
double	subtractionScaleWeight () const
	Return the scale weight for the matching subtraction.
double	splittingScaleWeight () const
	Return the scale weight for the splitting.
bool	restrictPhasespace () const
	Return true, if the phase space restrictions of the dipole shower should be applied.
void	restrictPhasespace (bool yes)
	Indicate that the phase space restrictions of the dipole shower should be applied.
Ptr< HardScaleProfile >::tptr	profileScales () const
	Return profile scales.
void	profileScales (Ptr< HardScaleProfile >::ptr prof)
	Set profile scales.
bool	hardScaleIsMuF () const
	Return true if maximum pt should be deduced from the factorization scale.
void	hardScaleIsMuF (bool yes)
	Indicate that maximum pt should be deduced from the factorization scale.
double	hardScaleFactor () const
	Return the scale factor for the hard scale.
void	hardScaleFactor (double f)
	Set the scale factor for the hard scale.
double	factorizationScaleFactor () const
	Get the factorization scale factor.
double	renormalizationScaleFactor () const
	Get the renormalization scale factor.
void	factorizationScaleFactor (double f)
	Set the factorization scale factor.
void	renormalizationScaleFactor (double f)
	Set the renormalization scale factor.
virtual void	checkCutoff ()
	Determine if the configuration is below or above the cutoff.
virtual void	getShowerVariables ()
	Determine all kinematic variables which are not provided by the dipole kinematics; store all shower variables in the respective dipole object for later use.
virtual CrossSection	dSigHatDR () const =0
	Return the shower approximation to the real emission cross section for the given pair of Born and real emission configurations.
virtual double	me2 () const =0
	Return the shower approximation splitting kernel for the given pair of Born and real emission configurations in units of the Born center of mass energy squared, and including a weight to project onto the splitting given by the dipole used.
double	bornPDFWeight (Energy2 muF) const
	Return the Born PDF weight.
double	realPDFWeight (Energy2 muF) const
	Return the real emission PDF weight.
virtual double	channelWeight (int emitter, int emission, int spectator, int bemitter) const
	Generate a weight for the given dipole channel.
virtual double	channelWeight () const
	Generate a normalized weight taking into account all channels.
Ptr< ColourBasis >::tptr	largeNBasis () const
	A large-N colour basis to be used when reproducing the shower kernels.
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.
Public Member Functions inherited from ThePEG::HandlerBaseT< UseRandom >
double	rnd () const
double	rnd (double xu) const
double	rnd (double xl, double xu) const
bool	rndbool () const
bool	rndbool (double p) const
bool	rndbool (double p1, double p2) const
int	rndsign (double p1, double p2, double p3) const
int	rnd2 (double p0, double p1) const
int	rnd3 (double p0, double p1, double p2) const
int	rnd4 (double p0, double p1, double p2, double p3) const
long	irnd (long xu=2) const
long	irnd (long xl, long xu) const
const StandardModelBase &	SM () const
tSMPtr	standardModel () const
Public Member Functions inherited from ThePEG::Interfaced
virtual bool	defaultInit ()
PPtr	getParticle (PID) const
PDPtr	getParticleData (PID) const
bool	used () const
void	useMe () const
tEGPtr	generator () const
void	persistentOutput (PersistentOStream &os) const
void	persistentInput (PersistentIStream &is, int version)
PPtr	getParticle (PID) const
PDPtr	getParticleData (PID) const
bool	used () const
void	useMe () const
tEGPtr	generator () const
Public Member Functions inherited from ThePEG::InterfacedBase
string	fullName () const
string	name () const
string	path () const
string	comment () const
void	setup (istream &is)
void	update ()
void	init ()
virtual bool	preInitialize () const
void	initrun ()
void	finish ()
void	touch ()
void	reset ()
void	clear ()
InitState	state () const
bool	locked () const
bool	touched () const
virtual IBPtr	fullclone () const
void	persistentOutput (PersistentOStream &os) const
void	persistentInput (PersistentIStream &is, int version)
virtual void	debugme () const
void	update ()
void	init ()
virtual bool	preInitialize () const
void	initrun ()
void	finish ()
void	touch ()
void	reset ()
void	clear ()
InitState	state () const
bool	locked () const
bool	touched () const
virtual IBPtr	fullclone () const
Public Member Functions inherited from ThePEG::Base
void	debug () const
virtual void	debugme () const
Public Member Functions inherited from ThePEG::Pointer::ReferenceCounted
CounterType	referenceCount () const
Public Member Functions inherited from ThePEG::Named
	Named (const string &newName=string())
	Named (const Named &)=default
const string &	name () const
bool	operator== (const Named &other) const
bool	operator< (const Named &other) const

Protected Member Functions
virtual bool	isInShowerPhasespace () const
	Return true, if the shower was able to generate an emission leading from the given Born to the given real emission process.
virtual bool	isAboveCutoff () const
	Return true, if the shower emission leading from the given Born to the given real emission process would have been generated above the shower's infrared cutoff.
void	calculateShowerVariables () const
	Calculate qtilde^2 and z for the splitting considered.
double	splitFn (const pair< Energy2, double > &) const
	Return the splitting function as a function of the kinematic variables.
Clone Methods.
virtual IBPtr	clone () const
	Make a simple clone of this object.
virtual IBPtr	fullclone () const
	Make a clone of this object, possibly modifying the cloned object to make it sane.
Protected Member Functions inherited from Herwig::ShowerApproximation
virtual bool	isInShowerPhasespace () const
	Return true, if the shower was able to generate an emission leading from the given Born to the given real emission process.
virtual bool	isAboveCutoff () const
	Return true, if the shower emission leading from the given Born to the given real emission process would have been generated above the shower's infrared cutoff.
virtual Energy	hardScale () const
	Return the relevant hard scale.
void	useOpenZ (bool yes)
	Use the maximum available phase space for the momentum fraction.
bool	openZ () const
	Return true if the maximum available phase space should be used for the momentum fraction.
void	setLargeNBasis ()
	Set the large-N basis.
Protected Member Functions inherited from ThePEG::Interfaced
void	reporeg (IBPtr object, string name) const
bool	setDefaultReference (PtrT &ptr, string classname, string objectname)
	Interfaced (const string &newName)
	Interfaced (const Interfaced &i)
void	setGenerator (tEGPtr generator)
Protected Member Functions inherited from ThePEG::InterfacedBase
virtual void	readSetup (istream &is)
virtual void	doupdate ()
virtual void	doinit ()
virtual void	doinitrun ()
virtual void	dofinish ()
virtual IVector	getReferences ()
virtual void	rebind (const TranslationMap &)
virtual IBPtr	clone () const=0
	InterfacedBase (string newName)
	InterfacedBase (const InterfacedBase &i)
virtual void	readSetup (istream &is)
virtual void	doupdate ()
virtual void	doinit ()
virtual void	doinitrun ()
virtual void	dofinish ()
virtual IVector	getReferences ()
virtual void	rebind (const TranslationMap &)
Protected Member Functions inherited from ThePEG::Pointer::ReferenceCounted
	ReferenceCounted (const ReferenceCounted &)
ReferenceCounted &	operator= (const ReferenceCounted &)
Protected Member Functions inherited from ThePEG::Named
const Named &	operator= (const Named &other)
const string &	name (const string &newName)

Standard Interfaced functions.
Ptr< ShowerHandler >::ptr	theShowerHandler
	The shower handler to be used.
Ptr< PartnerFinder >::ptr	theQTildeFinder
	The qtilde partner finder for calculating the hard scales.
Ptr< SudakovFormFactor >::ptr	theQTildeSudakov
	The qtilde Sudakov to access the cutoff.
bool	theCorrectForXZMismatch
	True, if PDF weight should be corrected for z/x mismatch at the hard phase space boundary.
virtual void	doinit ()
	Initialize this object after the setup phase before saving an EventGenerator to disk.
virtual void	doinitrun ()
	Initialize this object.
QTildeMatching &	operator= (const QTildeMatching &)=delete
	The assignment operator is private and must never be called.

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 void	Init ()
	The standard Init function used to initialize the interfaces.

Additional Inherited Members
Public Types inherited from Herwig::ShowerApproximation
enum	ScaleChoices { bornScale = 0 , realScale = 1 , showerScale = 2 }
	Enumerate possible scale choices. More...
Public Types inherited from ThePEG::InterfacedBase
enum	InitState
Public Types inherited from ThePEG::Pointer::ReferenceCounted
typedef unsigned int	CounterType
Static Public Member Functions inherited from Herwig::ShowerApproximation
static void	Init ()
	The standard Init function used to initialize the interfaces.
Static Public Member Functions inherited from ThePEG::HandlerBase
static void	Init ()
Static Public Member Functions inherited from ThePEG::Interfaced
static void	Init ()
Static Public Member Functions inherited from ThePEG::InterfacedBase
static void	Init ()
Static Public Member Functions inherited from ThePEG::Base
static void	Init ()
Public Attributes inherited from ThePEG::InterfacedBase
	initializing
	uninitialized
	initialized
	runready
Public Attributes inherited from ThePEG::Pointer::ReferenceCounted
const unsigned long	uniqueId
Static Protected Member Functions inherited from ThePEG::Interfaced
static void	registerRepository (IBPtr)
static void	registerRepository (IBPtr, string newName)
Protected Attributes inherited from Herwig::ShowerApproximation
Ptr< ColourBasis >::ptr	theLargeNBasis
	A large-N colour basis to be used when reproducing the shower kernels.
double	theExtrapolationX
	The x value from which on we extrapolate PDFs for numerically stable ratios.

Detailed Description

QTildeMatching implements NLO matching with the default shower.

Author

Simon Platzer

Definition at line 31 of file QTildeMatching.h.

Member Function Documentation

checkCutoff()

virtual void Herwig::QTildeMatching::checkCutoff ( )

virtual

Determine if the configuration is below or above the cutoff.

Reimplemented from Herwig::ShowerApproximation.

clone()

virtual IBPtr Herwig::QTildeMatching::clone ( ) const

protectedvirtual

Make a simple clone of this object.

Returns

a pointer to the new object.

Implements ThePEG::InterfacedBase.

doinit()

virtual void Herwig::QTildeMatching::doinit ( )

protectedvirtual

Initialize this object after the setup phase before saving an EventGenerator to disk.

Exceptions

InitException

if object could not be initialized properly.

Reimplemented from Herwig::ShowerApproximation.

doinitrun()

virtual void Herwig::QTildeMatching::doinitrun ( )

protectedvirtual

Initialize this object.

Called in the run phase just before a run begins.

Reimplemented from ThePEG::InterfacedBase.

dSigHatDR()

virtual CrossSection Herwig::QTildeMatching::dSigHatDR ( ) const

virtual

Return the shower approximation to the real emission cross section for the given pair of Born and real emission configurations.

Implements Herwig::ShowerApproximation.

fullclone()

virtual IBPtr Herwig::QTildeMatching::fullclone ( ) const

protectedvirtual

Make a clone of this object, possibly modifying the cloned object to make it sane.

Returns

a pointer to the new object.

Reimplemented from ThePEG::InterfacedBase.

getShowerVariables()

virtual void Herwig::QTildeMatching::getShowerVariables ( )

virtual

Determine all kinematic variables which are not provided by the dipole kinematics; store all shower variables in the respective dipole object for later use.

Reimplemented from Herwig::ShowerApproximation.

Init()

static void Herwig::QTildeMatching::Init ( )

static

The standard Init function used to initialize the interfaces.

Called exactly once for each class by the class description system before the main function starts or when this class is dynamically loaded.

isAboveCutoff()

virtual bool Herwig::QTildeMatching::isAboveCutoff ( ) const

protectedvirtual

Return true, if the shower emission leading from the given Born to the given real emission process would have been generated above the shower's infrared cutoff.

Reimplemented from Herwig::ShowerApproximation.

isInShowerPhasespace()

virtual bool Herwig::QTildeMatching::isInShowerPhasespace ( ) const

protectedvirtual

Return true, if the shower was able to generate an emission leading from the given Born to the given real emission process.

Reimplemented from Herwig::ShowerApproximation.

me2()

virtual double Herwig::QTildeMatching::me2 ( ) const

virtual

Return the shower approximation splitting kernel for the given pair of Born and real emission configurations in units of the Born center of mass energy squared, and including a weight to project onto the splitting given by the dipole used.

Implements Herwig::ShowerApproximation.

operator=()

QTildeMatching & Herwig::QTildeMatching::operator= ( const QTildeMatching &  )

privatedelete

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

persistentInput()

void Herwig::QTildeMatching::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 Herwig::QTildeMatching::persistentOutput

(

PersistentOStream &

os

)

const

Function used to write out object persistently.

Parameters

os	the persistent output stream written to.

Member Data Documentation

theCorrectForXZMismatch

bool Herwig::QTildeMatching::theCorrectForXZMismatch

private

True, if PDF weight should be corrected for z/x mismatch at the hard phase space boundary.

Definition at line 187 of file QTildeMatching.h.

theQTildeFinder

Ptr<PartnerFinder>::ptr Herwig::QTildeMatching::theQTildeFinder

private

The qtilde partner finder for calculating the hard scales.

Definition at line 176 of file QTildeMatching.h.

theQTildeSudakov

Ptr<SudakovFormFactor>::ptr Herwig::QTildeMatching::theQTildeSudakov

private

The qtilde Sudakov to access the cutoff.

Definition at line 181 of file QTildeMatching.h.

theShowerHandler

Ptr<ShowerHandler>::ptr Herwig::QTildeMatching::theShowerHandler

private

The shower handler to be used.

Definition at line 171 of file QTildeMatching.h.

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

• QTildeMatching.h