FlatInvertiblePhasespace implements flat, invertible phase space generation. More...

#include <FlatInvertiblePhasespace.h>

Inheritance diagram for Herwig::FlatInvertiblePhasespace:

[legend]

Public Member Functions
virtual double	generateTwoToNKinematics (const double *, vector< Lorentz5Momentum > &momenta)
	Generate a phase space point and return its weight.

virtual int	nDimPhasespace (int nFinal) const
	Return the number of random numbers required to produce a given multiplicity final state.

virtual bool	isInvertible () const
	Return true, if this phase space generator is invertible.

virtual double	invertTwoToNKinematics (const vector< Lorentz5Momentum > &momenta, double *r) const
	Invert the given phase space point to the random numbers which would have generated it.

Public Member Functions inherited from Herwig::MatchboxPhasespace
	MatchboxPhasespace ()
	The default constructor.

virtual void	setXComb (tStdXCombPtr xc)
	Set the XComb object steering the Born matrix element this class represents virtual corrections to.

Ptr< MatchboxFactory >::tcptr	factory () const
	Return the factory object.

Ptr< ProcessData >::tptr	processData () const
	Return the process data object.

virtual double	generateKinematics (const double *r, vector< Lorentz5Momentum > &momenta)
	Generate a phase space point and return its weight.

virtual double	generateTwoToNKinematics (const double *, vector< Lorentz5Momentum > &momenta)=0
	Generate a phase space point and return its weight.

virtual double	generateTwoToOneKinematics (const double *, vector< Lorentz5Momentum > &momenta)
	Generate a 2 -> 1 phase space point and return its weight.

virtual int	nDim (const cPDVector &) const
	Return the number of random numbers required to produce a given multiplicity final state.

virtual int	nDimPhasespace (int nFinal) const =0
	Return the number of random numbers required to produce a given multiplicity final state.

virtual bool	haveX1X2 () const
	Return true, if this phasespace generator will generate incoming partons itself.

virtual bool	wantCMS () const
	Return true, if this phase space generator expects the incoming partons in their center-of-mass system.

bool	useMassGenerators () const
	True, if mass generators should be used instead of fixed masses.

virtual Selector< MEBase::DiagramIndex >	selectDiagrams (const MEBase::DiagramVector &) const
	Fill a diagram selector for the last phase space point.

pair< double, Lorentz5Momentum >	timeLikeWeight (const Tree2toNDiagram &diag, int branch, double flatCut) const
	Return the momentum and weight appropriate to the given timelike branch of the diagram.

double	spaceLikeWeight (const Tree2toNDiagram &diag, const Lorentz5Momentum &incoming, int branch, double flatCut) const
	Return the weight appropriate to the given spacelike branch of the diagram.

double	diagramWeight (const Tree2toNDiagram &diag) const
	Return the weight appropriate to the given diagram.

void	fillDiagramWeights (double flatCut=0.0)
	Fill the diagram weights.

void	clearDiagramWeights ()
	Clear the diagram weights.

Ptr< MatchboxPhasespace >::ptr	cloneMe () const
	Clone this phase space generator.

virtual void	cloneDependencies (const std::string &prefix="")
	Clone the dependencies, using a given prefix.

virtual bool	isInvertible () const
	Return true, if this phase space generator is invertible.

virtual double	invertKinematics (const vector< Lorentz5Momentum > &momenta, double *r) const
	Invert the given phase space point to the random numbers which would have generated it.

virtual double	invertTwoToNKinematics (const vector< Lorentz5Momentum > &, double *) const
	Invert the given phase space point to the random numbers which would have generated it.

virtual double	invertTwoToOneKinematics (const vector< Lorentz5Momentum > &, double *) const
	Invert the given 2 -> 1 phase space point to the random numbers which would have generated it.

void	singularLimit (size_t i, size_t j)
	Limit phasespace generation to a given collinear or soft limit.

const pair< size_t, size_t > &	lastSingularIndices () const
	Return the last matched singular limit.

bool	matchConstraints (const vector< Lorentz5Momentum > &momenta)
	Return true, if constraints on phasespace generation have been met.

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

Public Member Functions inherited from ThePEG::LastXCombInfo< StandardXComb >
const XC &	lastXComb () const

const XC &	lastXComb () const

tXCPtr	lastXCombPtr () const

tXCPtr	lastXCombPtr () const

const XC &	lastHeadXComb () const

const XC &	lastHeadXComb () const

tXCPtr	lastHeadXCombPtr () const

tXCPtr	lastHeadXCombPtr () const

const EventHandler &	lastEventHandler () const

const EventHandler &	lastEventHandler () const

tPExtrPtr	lastExtractor () const

tPExtrPtr	lastExtractor () const

PDFT	pdf (tcPPtr parton) const

PDFT	pdf (tcPPtr parton) const

const Cuts &	lastCuts () const

const Cuts &	lastCuts () const

tCutsPtr	lastCutsPtr () const

tCutsPtr	lastCutsPtr () const

const PPair &	lastParticles () const

const PPair &	lastParticles () const

Energy2	lastS () const

Energy2	lastS () const

const PPair &	lastPartons () const

const PPair &	lastPartons () const

Energy2	lastSHat () const

Energy2	lastSHat () const

double	lastTau () const

double	lastTau () const

double	lastY () const

double	lastY () const

double	lastP1 () const

double	lastP1 () const

double	lastP2 () const

double	lastP2 () const

double	lastL1 () const

double	lastL1 () const

double	lastL2 () const

double	lastL2 () const

double	lastX1 () const

double	lastX1 () const

double	lastX2 () const

double	lastX2 () const

double	lastE1 () const

double	lastE1 () const

double	lastE2 () const

double	lastE2 () const

double	lastFL1L2 () const

double	lastFL1L2 () const

Energy2	lastScale () const

double	lastAlphaS () const

double	lastAlphaEM () const

const vector< Lorentz5Momentum > &	meMomenta () const

double	lastME2 () const

double	lastPreweight () const

double	jacobian () const

CrossSection	lastMECrossSection () const

double	lastMEPDFWeight () const

double	lastMECouplings () const

tSubProPtr	subProcess () const

const cPDVector &	mePartonData () const

Public Member Functions inherited from Herwig::LastMatchboxXCombInfo
	LastMatchboxXCombInfo ()
	Default constructor.

MatchboxXCombData *	lastMatchboxXComb () const
	Return a pointer to the last selected XComb.

MatchboxXCombData *	lastHeadMatchboxXComb () const
	If the last selected XComb object belongs to a group of XComb's return a pointer to the head XComb object for this group.

const vector< int > &	crossingMap () const
	The crossing information as filled by the last call to fillCrossingMap()

const map< size_t, size_t > &	amplitudeToColourMap () const
	The colour crossing information as filled by the last call to fillCrossingMap()

const map< size_t, size_t > &	colourToAmplitudeMap () const
	The colour crossing information as filled by the last call to fillCrossingMap()

double	crossingSign () const
	The crossing sign as filled by the last call to fillCrossingMap()

Energy2	lastRenormalizationScale () const
	The last renormalization scale.

const cPDVector &	amplitudePartonData () const
	The amplitude parton data.

const vector< Lorentz5Momentum > &	amplitudeMomenta () const
	The crossed momenta.

bool	calculateTreeAmplitudes () const
	True, if the the tree level amplitudes need to be calculated.

const map< vector< int >, CVector > &	lastAmplitudes () const
	The amplitude values which have been contributing to the last call of prepareAmplitudes.

const map< vector< int >, CVector > &	lastLargeNAmplitudes () const
	The leading N amplitude values which have been contributing to the last call of prepareAmplitudes.

bool	calculateOneLoopAmplitudes () const
	True, if the the one-loop amplitudes need to be calculated.

const map< vector< int >, CVector > &	lastOneLoopAmplitudes () const
	The one-loop amplitude values which have been contributing to the last call of prepareAmplitudes.

bool	calculateTreeME2 () const
	True, if the tree-level matrix element squared needs to be calculated.

double	lastTreeME2 () const
	The last tree-level matrix element squared.

bool	calculateLargeNME2 () const
	True, if the tree-level matrix element squared needs to be calculated.

double	lastLargeNME2 () const
	The last tree-level matrix element squared.

bool	calculateOneLoopInterference () const
	True, if the one-loop/tree-level interference.

double	lastOneLoopInterference () const
	The last one-loop/tree-level interference.

bool	calculateOneLoopPoles () const
	True, if the one-loop/tree-level interference.

pair< double, double >	lastOneLoopPoles () const
	The last one-loop/tree-level interference.

bool	calculateColourCorrelator (const pair< int, int > &ij) const
	True, if the indexed colour correlated matrix element needs to be calculated.

double	lastColourCorrelator (const pair< int, int > &ij) const
	The colour correlated matrix element.

bool	calculateLargeNColourCorrelator (const pair< int, int > &ij) const
	True, if the indexed large-N colour correlated matrix element needs to be calculated.

double	lastLargeNColourCorrelator (const pair< int, int > &ij) const
	The large-N colour correlated matrix element.

bool	calculateColourSpinCorrelator (const pair< int, int > &ij) const
	True, if the indexed colour/spin correlated matrix element needs to be calculated.

Complex	lastColourSpinCorrelator (const pair< int, int > &ij) const
	The colour/spin correlated matrix element.

bool	calculateSpinCorrelator (const pair< int, int > &ij) const
	True, if the indexed spin correlated matrix element needs to be calculated.

Complex	lastSpinCorrelator (const pair< int, int > &ij) const
	The spin correlated matrix element.

unsigned int	nLight () const
	Return the number of light flavours to be considered for this process.

vector< long >	nLightJetVec () const
	Return the vector that contains the PDG ids of the light flavours, which are contained in the jet particle group.

vector< long >	nHeavyJetVec () const
	Return the vector that contains the PDG ids of the heavy flavours, which are contained in the jet particle group.

vector< long >	nLightProtonVec () const
	Return the vector that contains the PDG ids of the light flavours, which are contained in the proton particle group.

size_t	colourBasisDim () const
	Get the dimensionality of the colour basis for this process.

int	nDimPhasespace () const
	Return the number of degrees of freedom required by the phase space generator.

int	nDimAmplitude () const
	Return the number of degrees of freedom required by the amplitude.

int	nDimInsertions () const
	Return the number of degrees of freedom required by the insertion operators.

const vector< double > &	amplitudeRandomNumbers () const
	Get the additional random numbers required by the amplitude.

const vector< double > &	insertionRandomNumbers () const
	Get the additional random numbers required by the insertion operator.

const map< int, double > &	diagramWeights () const
	Return the diagram weights indexed by diagram id.

const set< pair< size_t, size_t > > &	singularLimits () const
	Return the singular limits.

const set< pair< size_t, size_t > >::const_iterator &	lastSingularLimit () const
	Return the last matched singular limit.

Ptr< StandardModel >::tcptr	hwStandardModel () const
	Get the Herwig StandardModel object.

double	symmetryFactor () const
	Return the symmetry factor.

const vector< int > &	olpId () const
	Return the OLP process id.

double *	olpMomenta () const
	Return the olp momentum vector.

void	fillOLPMomenta (const vector< Lorentz5Momentum > &mm, const cPDVector &mePartonData, const map< long, Energy > &reshuffleMap) const
	Fill the olp momentum vector.

Private Member Functions
double	bisect (double v, double n, double target=-16., double maxLevel=80.) const
	Solve v = (n+2) * u^(n+1) - (n+1) * u^(n+2) for u.

double	rho (Energy M, Energy N, Energy m) const
	Return rho.

double	generateIntermediates (vector< Energy > &K, const double *r) const
	Generate intermediate masses for a massless final state.

double	invertIntermediates (const vector< Energy > &K, double *r) const
	Invert intermediate masses for a massless final state.

double	generateIntermediates (vector< Energy > &M, const vector< Energy > &m, const double *r) const
	Generate intermediate masses for a massive final state.

double	invertIntermediates (const vector< Energy > &M, const vector< Energy > &m, double *r) const
	Invert intermediate masses for a massive final state.

double	generateKinematics (vector< Lorentz5Momentum > &P, Energy Ecm, const double *r) const
	Generate momenta in the CMS.

double	invertKinematics (const vector< Lorentz5Momentum > &P, Energy Ecm, double *r) const
	Invert momenta in the CMS.

long double	flatWeights (int n) const
	Return the appropriate phase space weight, Eq.

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.

Clone Methods.
FlatInvertiblePhasespace &	operator= (const FlatInvertiblePhasespace &)=delete
	The assignment operator is private and must never be called.

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.

Additional Inherited Members
Public Types inherited from ThePEG::InterfacedBase
enum	InitState

Public Types inherited from ThePEG::Pointer::ReferenceCounted
typedef unsigned int	CounterType

Public Types inherited from ThePEG::LastXCombInfo< StandardXComb >
typedef ThePEG::Ptr< XC >::pointer	XCPtr

typedef ThePEG::Ptr< XC >::const_pointer	cXCPtr

typedef ThePEG::Ptr< XC >::transient_pointer	tXCPtr

typedef ThePEG::Ptr< XC >::transient_const_pointer	tcXCPtr

Static Public Member Functions inherited from Herwig::MatchboxPhasespace
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

Protected Member Functions inherited from Herwig::MatchboxPhasespace
void	setCoupling (long a, long b, long c, double coupling, bool includeCrossings=true)
	Set a coupling for the given vertex; the convention is that all legs are outgoing, and all possible crossings will be taken care of.

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)

Protected Member Functions inherited from Herwig::LastMatchboxXCombInfo
vector< int > &	crossingMap ()
	The crossing information as filled by the last call to fillCrossingMap()

map< size_t, size_t > &	amplitudeToColourMap ()
	The colour crossing information as filled by the last call to fillCrossingMap()

map< size_t, size_t > &	colourToAmplitudeMap ()
	The colour crossing information as filled by the last call to fillCrossingMap()

void	crossingSign (double c)
	The crossing sign as filled by the last call to fillCrossingMap()

void	lastRenormalizationScale (Energy2 lrs)
	The last renormalization scale.

cPDVector &	amplitudePartonData ()
	The amplitude parton data.

vector< Lorentz5Momentum > &	amplitudeMomenta ()
	The crossed momenta.

void	haveTreeAmplitudes (bool f=true)
	True, if the the tree level amplitudes need to be calculated.

map< vector< int >, CVector > &	lastAmplitudes ()
	The amplitude values which have been contributing to the last call of prepareAmplitudes.

map< vector< int >, CVector > &	lastLargeNAmplitudes ()
	The leading N amplitude values which have been contributing to the last call of prepareAmplitudes.

void	haveOneLoopAmplitudes (bool f=true)
	True, if the the one-loop amplitudes need to be calculated.

map< vector< int >, CVector > &	lastOneLoopAmplitudes ()
	The one-loop amplitude values which have been contributing to the last call of prepareAmplitudes.

void	lastTreeME2 (double v) const
	The last tree-level matrix element squared.

void	lastLargeNME2 (double v) const
	The last tree-level matrix element squared.

void	lastOneLoopInterference (double v) const
	The last one-loop/tree-level interference.

void	lastOneLoopPoles (pair< double, double > v) const
	The last one-loop/tree-level interference.

void	lastColourCorrelator (const pair< int, int > &ij, double v) const
	The colour correlated matrix element.

void	lastLargeNColourCorrelator (const pair< int, int > &ij, double v) const
	The large-N colour correlated matrix element.

void	lastColourSpinCorrelator (const pair< int, int > &ij, Complex v) const
	The colour/spin correlated matrix element.

void	lastSpinCorrelator (const pair< int, int > &ij, Complex v) const
	The spin correlated matrix element.

void	nLight (unsigned int n)
	Set the number of light flavours to be considered for this process.

void	nLightJetVec (int n)
	Set the elements of the vector that contains the PDG ids of the light flavours, which are contained in the jet particle group.

void	nHeavyJetVec (int n)
	Set the elements of the vector that contains the PDG ids of the heavy flavours, which are contained in the jet particle group.

void	nLightProtonVec (int n)
	Set the elements of the vector that contains the PDG ids of the light flavours, which are contained in the proton particle group.

void	colourBasisDim (size_t d)
	Set the dimensionality of the colour basis for this process.

void	nDimPhasespace (int d)
	Set the number of degrees of freedom required by the phase space generator.

void	nDimAmplitude (int d)
	Set the number of degrees of freedom required by the amplitude.

void	nDimInsertions (int d)
	Set the number of degrees of freedom required by the insertion operators.

vector< double > &	amplitudeRandomNumbers ()
	Access the additional random numbers required by the amplitude.

vector< double > &	insertionRandomNumbers ()
	Access the additional random numbers required by the insertion operator.

map< int, double > &	diagramWeights ()
	Access the diagram weights indexed by diagram id.

set< pair< size_t, size_t > > &	singularLimits ()
	Access the singular limits.

set< pair< size_t, size_t > >::const_iterator &	lastSingularLimit ()
	Access the last matched singular limit.

void	hwStandardModel (Ptr< StandardModel >::tcptr sm)
	Set the Herwig StandardModel object.

void	symmetryFactor (double f) const
	Set the symmetry factor.

void	olpId (int pType, int id)
	Set the OLP process id.

void	lastMatchboxXComb (tStdXCombPtr xc)
	Set the XComb pointer cast to MatchboxXComb.

Static Protected Member Functions inherited from ThePEG::Interfaced
static void	registerRepository (IBPtr)

static void	registerRepository (IBPtr, string newName)

Protected Attributes inherited from ThePEG::LastXCombInfo< StandardXComb >
XCPtr	theLastXComb

Protected Attributes inherited from Herwig::LastMatchboxXCombInfo
MatchboxXCombData *	theLastMatchboxXComb
	The XComb pointer cast to MatchboxXComb.

MatchboxXCombData *	theLastHeadMatchboxXComb
	The head XComb pointer cast to MatchboxXComb.

Detailed Description

FlatInvertiblePhasespace implements flat, invertible phase space generation.

Author: Simon Platzer

Definition at line 28 of file FlatInvertiblePhasespace.h.

Member Function Documentation

◆ clone()

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

protectedvirtual

Make a simple clone of this object.

Returns: a pointer to the new object.

Implements ThePEG::InterfacedBase.

Reimplemented in Herwig::FlatInvertibleLabframePhasespace.

◆ flatWeights()

long double Herwig::FlatInvertiblePhasespace::flatWeights ( int n ) const

private

Return the appropriate phase space weight, Eq.

11 in 1308.2922 with the factor (2 pi)^4/(2 pi)^(3n) included and the SHat of the process divided out to have everything expressed in the units of the ThePEG conventions, i.e. without the Q^2 factor

◆ fullclone()

virtual IBPtr Herwig::FlatInvertiblePhasespace::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.

Reimplemented in Herwig::FlatInvertibleLabframePhasespace.

◆ generateTwoToNKinematics()

virtual double Herwig::FlatInvertiblePhasespace::generateTwoToNKinematics	(	const double *	,
		vector< Lorentz5Momentum > &	momenta
	)

virtual

Generate a phase space point and return its weight.

Implements Herwig::MatchboxPhasespace.

Reimplemented in Herwig::FlatInvertibleLabframePhasespace.

◆ Init()

static void Herwig::FlatInvertiblePhasespace::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.

◆ invertTwoToNKinematics()

virtual double Herwig::FlatInvertiblePhasespace::invertTwoToNKinematics	(	const vector< Lorentz5Momentum > &	momenta,
		double *	r
	)		const

inlinevirtual

Invert the given phase space point to the random numbers which would have generated it.

Reimplemented from Herwig::MatchboxPhasespace.

Reimplemented in Herwig::FlatInvertibleLabframePhasespace.

Definition at line 59 of file FlatInvertiblePhasespace.h.

References invertKinematics().

◆ isInvertible()

virtual bool Herwig::FlatInvertiblePhasespace::isInvertible ( ) const

inlinevirtual

Return true, if this phase space generator is invertible.

Reimplemented from Herwig::MatchboxPhasespace.

Definition at line 53 of file FlatInvertiblePhasespace.h.

◆ nDimPhasespace()

virtual int Herwig::FlatInvertiblePhasespace::nDimPhasespace ( int nFinal ) const

inlinevirtual

Return the number of random numbers required to produce a given multiplicity final state.

Implements Herwig::MatchboxPhasespace.

Reimplemented in Herwig::FlatInvertibleLabframePhasespace.

Definition at line 42 of file FlatInvertiblePhasespace.h.

◆ operator=()

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

privatedelete

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

◆ persistentInput()

void Herwig::FlatInvertiblePhasespace::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::FlatInvertiblePhasespace::persistentOutput ( PersistentOStream & os ) const

Function used to write out object persistently.

Parameters

os	the persistent output stream written to.

◆ rho()

double Herwig::FlatInvertiblePhasespace::rho	(	Energy	M,
		Energy	N,
		Energy	m
	)		const

inlineprivate

Return rho.

Definition at line 75 of file FlatInvertiblePhasespace.h.

References ThePEG::sqr(), and ThePEG::sqrt().

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

FlatInvertiblePhasespace.h

Public Member Functions

Private Member Functions

Functions used by the persistent I/O system.

Clone Methods.

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ clone()

◆ flatWeights()

◆ fullclone()

◆ generateTwoToNKinematics()

◆ Init()

◆ invertTwoToNKinematics()

◆ isInvertible()

◆ nDimPhasespace()

◆ operator=()

◆ persistentInput()

◆ persistentOutput()

◆ rho()