This class is designed for the partonic decay of a bottom or charm mesons and baryons and is intended to be the same as that in HERWIG6.4. More...

#include <HeavyDecayer.h>

Inheritance diagram for Herwig::HeavyDecayer:

[legend]

Public Member Functions
	HeavyDecayer ()
	Default constructor.

virtual bool	accept (tcPDPtr parent, const tPDVector &children) const
	Check if this decayer can perfom the decay for a particular mode.

virtual ParticleVector	decay (const Particle &parent, const tPDVector &children) const
	Perform the decay of the particle to the specified decay products.

virtual void	dataBaseOutput (ofstream &os, bool header) const
	Output the setup information for the particle database.

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)

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

virtual ParticleVector	decay (const DecayMode &dm, const Particle &p) const
	Perform a decay for a given DecayMode and a given Particle instance.

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 Herwig::HwDecayerBase
	HwDecayerBase ()
	The default constructor.

virtual bool	accept (const DecayMode &dm) const
	Check if this decayer can perfom the decay specified by the given decay mode.

virtual POWHEGType	hasPOWHEGCorrection ()
	Has a POWHEG style correction.

virtual bool	hasMECorrection ()
	Has an old fashioned ME correction.

virtual void	initializeMECorrection (RealEmissionProcessPtr, double &, double &)
	Initialize the ME correction.

virtual RealEmissionProcessPtr	applyHardMatrixElementCorrection (RealEmissionProcessPtr)
	Apply the hard matrix element correction to a given hard process or decay.

virtual bool	softMatrixElementVeto (PPtr parent, PPtr progenitor, const bool &fs, const Energy &highestpT, const vector< tcPDPtr > &ids, const double &z, const Energy &scale, const Energy &pT)
	Apply the soft matrix element correction.

virtual RealEmissionProcessPtr	generateHardest (RealEmissionProcessPtr)
	Apply the POWHEG style correction.

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.

bool	initialize () const
	Access to the initialize variable.

bool	databaseOutput () const
	Access the database output variable.

Public Member Functions inherited from ThePEG::Decayer
void	persistentOutput (PersistentOStream &os) const

void	persistentInput (PersistentIStream &is, int version)

virtual bool	accept (const DecayMode &dm) const=0

virtual bool	needsFullStep () const

virtual ParticleVector	decay (const DecayMode &dm, const Particle &p) const=0

virtual ParticleVector	decay (const DecayMode &dm, const Particle &p, Step &step) const

virtual double	brat (const DecayMode &dm, const ParticleData &pd, double oldbrat) const

virtual double	brat (const DecayMode &dm, const Particle &p, double oldbrat) const

virtual ParticleVector	getChildren (const DecayMode &dm, const Particle &parent) const

virtual void	finalBoost (const Particle &parent, const ParticleVector &children) const

virtual void	setScales (const Particle &parent, const ParticleVector &children) const

Ptr< Amplitude >::pointer	amplitude () const

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

Static Public Member Functions
static void	Init ()
	Standard Init function used to initialize the interface.

Static Public Member Functions inherited from Herwig::PartonicDecayerBase
static void	Init ()
	The standard Init function used to initialize the interfaces.

Static Public Member Functions inherited from Herwig::HwDecayerBase
static void	Init ()
	The standard Init function used to initialize the interfaces.

Static Public Member Functions inherited from ThePEG::Decayer
static void	Init ()

static ParticleVector	DecayParticle (tPPtr parent, Step &step, long maxtry=1000)

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 ()

Clone Methods.
int	MECode
	The code for the matrix element being used.

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.

static double	VAWt (Energy2, Energy2, Energy2, InvEnergy4)
	Weighting of phase space for V-A matrix elements.

const HeavyDecayer &	operator= (const HeavyDecayer &)=delete
	Private and non-existent assignment operator.

Additional Inherited Members
Public Types inherited from Herwig::HwDecayerBase
enum	POWHEGType { No , ISR , FSR , Both }
	Virtual members to be overridden by inheriting classes which implement hard corrections. More...

Public Types inherited from ThePEG::InterfacedBase
enum	InitState

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

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::PartonicDecayerBase
virtual void	doinit ()
	Initialize this object after the setup phase before saving an EventGenerator to disk.

bool	duplicateMode (const Particle &parent, const vector< tPPtr > &hadrons) const
	Check hadrons produced in a partonic hadron decay do not reproduce an inclusive mode.

PVector	shower (const Particle &parent, ParticleVector &partons) const
	Perform the parton shower.

bool	timeLikeShower (tShowerParticlePtr particle, Branching fb, bool first, PVector &output) const

Protected Member Functions inherited from Herwig::HwDecayerBase
virtual void	dofinish ()
	Finalize this object.

void	fixRho (RhoDMatrix &) const
	Set rho to be diagonal if no correlations.

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)

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

static void	registerRepository (IBPtr, string newName)

Detailed Description

This class is designed for the partonic decay of a bottom or charm mesons and baryons and is intended to be the same as that in HERWIG6.4.

Only four body partonic decays are supported.

Two types of matrix element are supported for this decay

MECode=0 flat phase space
MECode=100 V-A matrix element for the heavy quark decay in the spectator model.

The class decays a particle based on the DecayMode given. The basic idea is that the heavy parton in the heavy meson will decay weakly while the other parton will be more or less unchanged. This produces 4 partons, the spectator plus the result of the weak decay. The W then decays again into two more partons, e.g. a decay of \(B^0\to d,\bar{c},\bar{d}, u \).

\(\bar{b}\to\bar{c}\) (colour connected to spectator) and \(W^+\to\bar{d}u\) (the W decay products are colour connected)

The resulting partons then need to be hadronized and decayed again.

See also: QuarkoniumDecayer; Hw64Decayer; Decayer

Definition at line 47 of file HeavyDecayer.h.

Member Function Documentation

◆ accept()

virtual bool Herwig::HeavyDecayer::accept	(	tcPDPtr	parent,
		const tPDVector &	children
	)		const

virtual

Check if this decayer can perfom the decay for a particular mode.

Parameters

parent	The decaying particle
children	The decay products

Returns: true If this decayer can handle the given mode, otherwise false.

Implements Herwig::PartonicDecayerBase.

◆ clone()

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

virtual

Make a simple clone of this object.

Returns: a pointer to the new object.

Implements ThePEG::InterfacedBase.

◆ dataBaseOutput()

virtual void Herwig::HeavyDecayer::dataBaseOutput	(	ofstream &	os,
		bool	header
	)		const

virtual

Output the setup information for the particle database.

Parameters

os	The stream to output the information to
header	Whether or not to output the information for MySQL

Reimplemented from Herwig::PartonicDecayerBase.

◆ decay()

virtual ParticleVector Herwig::HeavyDecayer::decay	(	const Particle &	parent,
		const tPDVector &	children
	)		const

virtual

Perform the decay of the particle to the specified decay products.

Parameters

parent	The decaying particle
children	The decay products

Returns: a ParticleVector containing the decay products.

Implements Herwig::PartonicDecayerBase.

◆ fullclone()

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

virtual

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.

◆ persistentInput()

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

Function used to write out object persistently.

Parameters

os	the persistent output stream written to.

Member Data Documentation

◆ MECode

int Herwig::HeavyDecayer::MECode

private

The code for the matrix element being used.

Definition at line 136 of file HeavyDecayer.h.

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

HeavyDecayer.h

is	the persistent input stream read from.
version	the version number of the object when written.

Public Member Functions

Static Public Member Functions

Clone Methods.

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ accept()

◆ clone()

◆ dataBaseOutput()

◆ decay()

◆ fullclone()

◆ persistentInput()

◆ persistentOutput()

Member Data Documentation

◆ MECode