The FFDipole class generates radiation from a final-final dipole for the generation of photons in decay by the SOPTHY algorithm. More...

#include <FFDipole.h>

Inheritance diagram for Herwig::FFDipole:

[legend]

Public Member Functions
	FFDipole ()
	The default constructor.

virtual ParticleVector	generatePhotons (const Particle &p, ParticleVector children, tDecayIntegratorPtr decayer)
	Member to generate the photons from the dipole.

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
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.

double	photon (double beta1, double ombeta1, double beta2, double ombeta2)
	Generate the momentum of a photon.

double	exactDipoleWeight (double beta1, double ombeta1, double beta2, double ombeta2, unsigned int iphot)
	Calculate the exact weight for the dipole.

double	jacobianWeight ()
	Jacobian factor for the weight.

double	meWeight (const ParticleVector &children)
	Matrix element weight.

double	makePhotons (const Boost &boost, const ParticleVector &children)
	Member which generates the photons.

bool	boostMomenta (const Boost &boost)
	Boost all the momenta from the dipole rest frame via the parent rest frame to the lab.

unsigned int	removePhotons ()
	Remove any photons which fail the energy cuts.

double	collinearWeight (const ParticleVector &children)
	The real emission weight in the collinear limit.

double	virtualWeight (const ParticleVector &children)
	The vrtiual correction weight.

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.
Energy	_emin
	The minimum photon energy in the boosted frame.

Energy	_eminrest
	The minimum photon energy in the rest frame.

Energy	_eminlab
	The minimum photon energy in the lab frame.

Energy	_emax
	The maximum photon energy.

unsigned int	_multiplicity
	Photon multiplicity being generated.

vector< Energy >	_m
	Masses of the particles involved.

double	_charge
	Produce of the particles charges.

vector< Lorentz5Momentum >	_qdrf
	Momenta of the particles in the dipole rest frame.

vector< Lorentz5Momentum >	_qnewdrf

vector< Lorentz5Momentum >	_ldrf
	Momenta of the photons in the dipole rest frame.

Lorentz5Momentum	_bigLdrf
	Total momentum of the photons in the dipole rest frame.

vector< Lorentz5Momentum >	_qprf
	Momentum of the particles in the parent's rest frame.

vector< Lorentz5Momentum >	_qnewprf
	Momenta of the charged particles in the parent's rest frame after radiation.

vector< Lorentz5Momentum >	_lprf
	Momenta of the photons in the parent rest frame.

Lorentz5Momentum	_bigLprf
	Total momentum of the photons in the parent rest frame.

vector< Lorentz5Momentum >	_qlab
	Momentum of the particles in the lab frame.

vector< Lorentz5Momentum >	_qnewlab
	Momenta of the charged particles in the lab frame after radiation.

vector< Lorentz5Momentum >	_llab
	Momenta of the photons in the lab frame.

Lorentz5Momentum	_bigLlab
	Total momentum of the photons in the lab frame.

double	_dipolewgt
	Reweighting factors due to differences between the true and crude distributions.

double	_yfswgt
	Reweighting factor for the YFS form-factor.

double	_jacobianwgt
	Reweighting factor due to phase space.

double	_mewgt
	Reweighting factor due to matrix element corrections.

double	_maxwgt
	Maximum weight.

vector< double >	_cosphot
	Angles of the photons with respect to the first charged particle which are stored for numerical accuracy.

vector< double >	_sinphot
	Sine of the photon angles.

vector< double >	_photonwgt
	Weights for the individual photons.

vector< bool >	_photcut
	Whether a given photon passes the energy cut.

unsigned int	_mode
	Type of unweighting to perform.

unsigned int	_maxtry
	Maximum number of attempts to generate a result.

unsigned int	_energyopt
	Option for the energy cut-off.

unsigned int	_betaopt
	Option for the inclusion of higher order corrections.

unsigned int	_dipoleopt
	Option for the form of the primary distribution.

tDecayIntegratorPtr	_decayer
	The decayer.

tPPtr	_parent
	The decaying particle.

unsigned int	_nweight
	Storage of averages etc for testing.

double	_wgtsum
	Sum of weights.

double	_wgtsq
	Sum of squares of weights.

bool	_weightOutput
	Whether or not to output the averages.

virtual void	dofinish ()
	Finalize this object.

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

void	printDebugInfo (const Particle &p, const ParticleVector &children, double wgt) const
	Debug output.

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 ThePEG::InterfacedBase
enum	InitState

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

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)

Detailed Description

The FFDipole class generates radiation from a final-final dipole for the generation of photons in decay by the SOPTHY algorithm.

See also: SOPTHY; The interfaces defined for FFDipole.

Definition at line 38 of file FFDipole.h.

Constructor & Destructor Documentation

◆ FFDipole()

Herwig::FFDipole::FFDipole ( )

inline

The default constructor.

Definition at line 45 of file FFDipole.h.

Member Function Documentation

◆ boostMomenta()

bool Herwig::FFDipole::boostMomenta ( const Boost & boost )

protected

Boost all the momenta from the dipole rest frame via the parent rest frame to the lab.

Parameters

boost The boost vector from the rest frame to the lab

Returns: Whether or not it suceeded

◆ clone()

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

inlineprotectedvirtual

Make a simple clone of this object.

Returns: a pointer to the new object.

Implements ThePEG::InterfacedBase.

Definition at line 100 of file FFDipole.h.

◆ dofinish()

virtual void Herwig::FFDipole::dofinish ( )

protectedvirtual

Finalize this object.

Called in the run phase just after a run has ended. Used eg. to write out statistics.

Reimplemented from ThePEG::InterfacedBase.

◆ exactDipoleWeight()

double Herwig::FFDipole::exactDipoleWeight	(	double	beta1,
		double	ombeta1,
		double	beta2,
		double	ombeta2,
		unsigned int	iphot
	)

inlineprotected

Calculate the exact weight for the dipole.

Parameters

beta1	Velocity of the first charged particle, \(\beta_1\)
beta2	Velocity of the second charged particle, \(\beta_2\).
ombeta1	One minus the velocity of the first particle, \(1-\beta_1\)
ombeta2	One minus the velocity of the second particle, \(1-\beta_2\)
iphot	The number of the photon for which the weight is required

Returns: The weight

Definition at line 132 of file FFDipole.h.

References _cosphot, _sinphot, and ThePEG::sqr().

◆ fullclone()

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

inlineprotectedvirtual

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.

Definition at line 106 of file FFDipole.h.

◆ generatePhotons()

virtual ParticleVector Herwig::FFDipole::generatePhotons	(	const Particle &	p,
		ParticleVector	children,
		tDecayIntegratorPtr	decayer
	)

virtual

Member to generate the photons from the dipole.

Parameters

p	The decaying particle
children	The decay products
decayer	The decayer for this mode

Returns: The decay products with additional radiation

◆ Init()

static void Herwig::FFDipole::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.

◆ jacobianWeight()

double Herwig::FFDipole::jacobianWeight ( )

inlineprotected

Jacobian factor for the weight.

Definition at line 153 of file FFDipole.h.

References _bigLdrf, _m, _qnewdrf, Herwig::Kinematics::pstarTwoBodyDecay(), ThePEG::sqr(), and ThePEG::sqrt().

◆ makePhotons()

double Herwig::FFDipole::makePhotons	(	const Boost &	boost,
		const ParticleVector &	children
	)

protected

Member which generates the photons.

Parameters

boost	Boost vector to take the particles produced back from the decaying particle's rest frame to the lab
children	The decay products

◆ operator=()

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

privatedelete

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

◆ persistentInput()

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

Function used to write out object persistently.

Parameters

os	the persistent output stream written to.

◆ photon()

double Herwig::FFDipole::photon	(	double	beta1,
		double	ombeta1,
		double	beta2,
		double	ombeta2
	)

protected

Generate the momentum of a photon.

Parameters

beta1	The velocity, \(\beta_1\), of the first charged particle
ombeta1	One minus the velocity, \(1-\beta_1\), of the first charged particle which is supplied for numerical stability
beta2	The velocity, \(\beta_2\), of the second charged particle
ombeta2	One minus the velocity, \(1-\beta_2\), of the second charged particle which is supplied for numerical stability

Returns: The contribution to the dipole weight

◆ removePhotons()

unsigned int Herwig::FFDipole::removePhotons ( )

protected

Remove any photons which fail the energy cuts.

Returns: Number of photons removed

Member Data Documentation

◆ _betaopt

unsigned int Herwig::FFDipole::_betaopt

private

Option for the inclusion of higher order corrections.

Definition at line 416 of file FFDipole.h.

◆ _bigLdrf

Lorentz5Momentum Herwig::FFDipole::_bigLdrf

private

Total momentum of the photons in the dipole rest frame.

Definition at line 287 of file FFDipole.h.

Referenced by jacobianWeight().

◆ _bigLlab

Lorentz5Momentum Herwig::FFDipole::_bigLlab

private

Total momentum of the photons in the lab frame.

Definition at line 337 of file FFDipole.h.

◆ _bigLprf

Lorentz5Momentum Herwig::FFDipole::_bigLprf

private

Total momentum of the photons in the parent rest frame.

Definition at line 312 of file FFDipole.h.

◆ _charge

double Herwig::FFDipole::_charge

private

Produce of the particles charges.

Definition at line 264 of file FFDipole.h.

◆ _cosphot

vector<double> Herwig::FFDipole::_cosphot

private

Angles of the photons with respect to the first charged particle which are stored for numerical accuracy.

Cosine of the photon angles

Definition at line 380 of file FFDipole.h.

Referenced by exactDipoleWeight().

◆ _decayer

tDecayIntegratorPtr Herwig::FFDipole::_decayer

private

The decayer.

Definition at line 426 of file FFDipole.h.

◆ _dipoleopt

unsigned int Herwig::FFDipole::_dipoleopt

private

Option for the form of the primary distribution.

Definition at line 421 of file FFDipole.h.

◆ _dipolewgt

double Herwig::FFDipole::_dipolewgt

private

Reweighting factors due to differences between the true and crude distributions.

Reweighting factor for the real emission

Definition at line 349 of file FFDipole.h.

◆ _emax

Energy Herwig::FFDipole::_emax

private

The maximum photon energy.

Definition at line 249 of file FFDipole.h.

◆ _emin

Energy Herwig::FFDipole::_emin

private

The minimum photon energy in the boosted frame.

Definition at line 234 of file FFDipole.h.

◆ _eminlab

Energy Herwig::FFDipole::_eminlab

private

The minimum photon energy in the lab frame.

Definition at line 244 of file FFDipole.h.

◆ _eminrest

Energy Herwig::FFDipole::_eminrest

private

The minimum photon energy in the rest frame.

Definition at line 239 of file FFDipole.h.

◆ _energyopt

unsigned int Herwig::FFDipole::_energyopt

private

Option for the energy cut-off.

Definition at line 411 of file FFDipole.h.

◆ _jacobianwgt

double Herwig::FFDipole::_jacobianwgt

private

Reweighting factor due to phase space.

Definition at line 359 of file FFDipole.h.

◆ _ldrf

vector<Lorentz5Momentum> Herwig::FFDipole::_ldrf

private

Momenta of the photons in the dipole rest frame.

Definition at line 282 of file FFDipole.h.

◆ _llab

vector<Lorentz5Momentum> Herwig::FFDipole::_llab

private

Momenta of the photons in the lab frame.

Definition at line 332 of file FFDipole.h.

◆ _lprf

vector<Lorentz5Momentum> Herwig::FFDipole::_lprf

private

Momenta of the photons in the parent rest frame.

Definition at line 307 of file FFDipole.h.

◆ _m

vector<Energy> Herwig::FFDipole::_m

private

Masses of the particles involved.

Definition at line 259 of file FFDipole.h.

Referenced by jacobianWeight().

◆ _maxtry

unsigned int Herwig::FFDipole::_maxtry

private

Maximum number of attempts to generate a result.

Definition at line 406 of file FFDipole.h.

◆ _maxwgt

double Herwig::FFDipole::_maxwgt

private

Maximum weight.

Definition at line 369 of file FFDipole.h.

◆ _mewgt

double Herwig::FFDipole::_mewgt

private

Reweighting factor due to matrix element corrections.

Definition at line 364 of file FFDipole.h.

◆ _mode

unsigned int Herwig::FFDipole::_mode

private

Type of unweighting to perform.

Definition at line 401 of file FFDipole.h.

◆ _multiplicity

unsigned int Herwig::FFDipole::_multiplicity

private

Photon multiplicity being generated.

Definition at line 254 of file FFDipole.h.

◆ _nweight

unsigned int Herwig::FFDipole::_nweight

private

Storage of averages etc for testing.

Number of attempts

Definition at line 440 of file FFDipole.h.

◆ _parent

tPPtr Herwig::FFDipole::_parent

private

The decaying particle.

Definition at line 431 of file FFDipole.h.

◆ _photcut

vector<bool> Herwig::FFDipole::_photcut

private

Whether a given photon passes the energy cut.

Definition at line 396 of file FFDipole.h.

◆ _photonwgt

vector<double> Herwig::FFDipole::_photonwgt

private

Weights for the individual photons.

Definition at line 391 of file FFDipole.h.

◆ _qdrf

vector<Lorentz5Momentum> Herwig::FFDipole::_qdrf

private

Momenta of the particles in the dipole rest frame.

Momenta of the charged particles in the dipole rest frame before radiation

Definition at line 273 of file FFDipole.h.

◆ _qlab

vector<Lorentz5Momentum> Herwig::FFDipole::_qlab

private

Momentum of the particles in the lab frame.

Momenta of the charged particles in the lab frame before radiation

Definition at line 322 of file FFDipole.h.

◆ _qnewdrf

vector<Lorentz5Momentum> Herwig::FFDipole::_qnewdrf

private

Momenta of the charged particles in the dipole rest frame after radiation

Definition at line 277 of file FFDipole.h.

Referenced by jacobianWeight().

◆ _qnewlab

vector<Lorentz5Momentum> Herwig::FFDipole::_qnewlab

private

Momenta of the charged particles in the lab frame after radiation.

Definition at line 327 of file FFDipole.h.

◆ _qnewprf

vector<Lorentz5Momentum> Herwig::FFDipole::_qnewprf

private

Momenta of the charged particles in the parent's rest frame after radiation.

Definition at line 302 of file FFDipole.h.

◆ _qprf

vector<Lorentz5Momentum> Herwig::FFDipole::_qprf

private

Momentum of the particles in the parent's rest frame.

Momenta of the charged particles in the parent's rest frame before radiation

Definition at line 297 of file FFDipole.h.

◆ _sinphot

vector<double> Herwig::FFDipole::_sinphot

private

Sine of the photon angles.

Definition at line 385 of file FFDipole.h.

Referenced by exactDipoleWeight().

◆ _weightOutput

bool Herwig::FFDipole::_weightOutput

private

Whether or not to output the averages.

Definition at line 455 of file FFDipole.h.

◆ _wgtsq

double Herwig::FFDipole::_wgtsq

private

Sum of squares of weights.

Definition at line 450 of file FFDipole.h.

◆ _wgtsum

double Herwig::FFDipole::_wgtsum

private

Sum of weights.

Definition at line 445 of file FFDipole.h.

◆ _yfswgt

double Herwig::FFDipole::_yfswgt

private

Reweighting factor for the YFS form-factor.

Definition at line 354 of file FFDipole.h.

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

FFDipole.h

Public Member Functions

Protected Member Functions

Standard Interfaced functions.

Functions used by the persistent I/O system.

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ FFDipole()

Member Function Documentation

◆ boostMomenta()

◆ clone()

◆ dofinish()

◆ exactDipoleWeight()

◆ fullclone()

◆ generatePhotons()

◆ Init()

◆ jacobianWeight()

◆ makePhotons()

◆ operator=()

◆ persistentInput()

◆ persistentOutput()

◆ photon()

◆ removePhotons()

Member Data Documentation

◆ _betaopt

◆ _bigLdrf

◆ _bigLlab

◆ _bigLprf

◆ _charge

◆ _cosphot

◆ _decayer

◆ _dipoleopt

◆ _dipolewgt

◆ _emax

◆ _emin

◆ _eminlab

◆ _eminrest

◆ _energyopt

◆ _jacobianwgt

◆ _ldrf

◆ _llab

◆ _lprf

◆ _m

◆ _maxtry

◆ _maxwgt

◆ _mewgt

◆ _mode

◆ _multiplicity

◆ _nweight

◆ _parent

◆ _photcut

◆ _photonwgt

◆ _qdrf

◆ _qlab

◆ _qnewdrf

◆ _qnewlab

◆ _qnewprf

◆ _qprf

◆ _sinphot

◆ _weightOutput

◆ _wgtsq

◆ _wgtsum

◆ _yfswgt