The RadiativeDoublyHeavyBaryonDecayer class is designed for the radiative decay of a baryon containing a heavy quark to another baryon containing a heavy quark. More...

#include <RadiativeDoublyHeavyBaryonDecayer.h>

Inheritance diagram for Herwig::RadiativeDoublyHeavyBaryonDecayer:

[legend]

Public Member Functions
virtual int	modeNumber (bool &cc, tcPDPtr parent, const tPDVector &children) const
	Which of the possible decays is required.

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

Public Member Functions inherited from Herwig::Baryon1MesonDecayerBase
double	me2 (const int ichan, const Particle &part, const tPDVector &outgoing, const vector< Lorentz5Momentum > &momenta, MEOption meopt) const
	Return the matrix element squared for a given mode and phase-space channel.

virtual void	constructSpinInfo (const Particle &part, ParticleVector outgoing) const
	Construct the SpinInfos for the particles produced in the decay.

virtual bool	twoBodyMEcode (const DecayMode &dm, int &mecode, double &coupling) const
	Specify the $1\to2$ matrix element to be used in the running width calculation.

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

Public Member Functions inherited from Herwig::DecayIntegrator
	DecayIntegrator ()
	The 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
	For a given decay mode and a given particle instance, perform the decay and return the decay products.

virtual int	modeNumber (bool &cc, tcPDPtr parent, const tPDVector &children) const =0
	Which of the possible decays is required.

int	imode () const
	The mode being used for this decay.

void	addMode (PhaseSpaceModePtr mode) const
	Add a phase-space mode to the list.

virtual double	me2 (const int ichan, const Particle &part, const tPDVector &outgoing, const vector< Lorentz5Momentum > &momenta, MEOption meopt) const =0
	Return the matrix element squared for a given mode and phase-space channel.

virtual void	constructSpinInfo (const Particle &part, ParticleVector outgoing) const =0
	Construct the SpinInfos for the particles produced in the decay.

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

void	setPartialWidth (const DecayMode &dm, int imode)
	Set the code for the partial width.

virtual bool	twoBodyMEcode (const DecayMode &, int &mecode, double &coupling) const
	Specify the $1\to2$ matrix element to be used in the running width calculation.

virtual WidthCalculatorBasePtr	threeBodyMEIntegrator (const DecayMode &dm) const
	Method to return an object to calculate the 3 (or higher body) partial width.

virtual double	threeBodyMatrixElement (const int imode, const Energy2 q2, const Energy2 s3, const Energy2 s2, const Energy2 s1, const Energy m1, const Energy m2, const Energy m3) const
	The matrix element to be integrated for the three-body decays as a function of the invariant masses of pairs of the outgoing particles.

virtual InvEnergy	threeBodydGammads (const int imode, const Energy2 q2, const Energy2 s, const Energy m1, const Energy m2, const Energy m3) const
	The differential three body decay rate with one integral performed.

int	findMode (const DecayMode &dm)
	Finds the phase-space mode corresponding to a given decay mode.

ParticleVector	generatePhotons (const Particle &p, ParticleVector children)
	Members for the generation of QED radiation in the decays.

bool	canGeneratePhotons ()
	check if photons can be generated in the decay

virtual double	oneLoopVirtualME (unsigned int imode, const Particle &part, const ParticleVector &products)
	The one-loop virtual correction.

bool	hasOneLoopME ()
	Whether or not the one loop matrix element is implemented.

virtual InvEnergy2	realEmissionME (unsigned int imode, const Particle &part, ParticleVector &products, unsigned int iemitter, double ctheta, double stheta, const LorentzRotation &rot1, const LorentzRotation &rot2)
	The real emission matrix element.

bool	hasRealEmissionME ()
	Whether or not the real emission matrix element is implemented.

bool	warnings () const

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

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

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.

Protected Member Functions inherited from Herwig::Baryon1MesonDecayerBase
virtual void	halfHalfScalarCoupling (int imode, Energy m0, Energy m1, Energy m2, Complex &A, Complex &B) const
	Coupling Members.

virtual void	halfHalfVectorCoupling (int imode, Energy m0, Energy m1, Energy m2, Complex &A1, Complex &A2, Complex &B1, Complex &B2) const
	Couplings for spin- $\frac12$ to spin- $\frac12$ and a vector.

virtual void	halfThreeHalfScalarCoupling (int imode, Energy m0, Energy m1, Energy m2, Complex &A, Complex &B) const
	Couplings for spin- $\frac12$ to spin- $\frac32$ and a scalar.

virtual void	halfThreeHalfVectorCoupling (int imode, Energy m0, Energy m1, Energy m2, Complex &A1, Complex &A2, Complex &A3, Complex &B1, Complex &B2, Complex &B3) const
	Couplings for spin- $\frac12$ to spin- $\frac32$ and a vector.

virtual void	threeHalfHalfScalarCoupling (int imode, Energy m0, Energy m1, Energy m2, Complex &A, Complex &B) const
	Couplings for spin- $\frac32$ to spin- $\frac12$ and a scalar.

virtual void	threeHalfHalfVectorCoupling (int imode, Energy m0, Energy m1, Energy m2, Complex &A1, Complex &A2, Complex &A3, Complex &B1, Complex &B2, Complex &B3) const
	Couplings for spin- $\frac32$ to spin- $\frac12$ and a vector.

virtual void	threeHalfThreeHalfScalarCoupling (int imode, Energy m0, Energy m1, Energy m2, Complex &A1, Complex &A2, Complex &B1, Complex &B2) const
	Couplings for spin- $\frac32$ to spin- $\frac32$ and a scalar.

Protected Member Functions inherited from Herwig::DecayIntegrator
ParticleVector	generate (bool inter, bool cc, const unsigned int &imode, const Particle &inpart) const
	Generate the momenta for the decay.

void	imode (int in)
	Set the mode being use for this decay.

void	ME (DecayMEPtr in) const
	Set the helicity matrix element for the decay.

DecayMEPtr	ME () const
	The helicity amplitude matrix element for spin correlations.

void	resetIntermediate (tcPDPtr part, Energy mass, Energy width)
	Reset the properities of all intermediates.

Energy	initializePhaseSpaceMode (unsigned int imode, bool init, bool onShell=false) const
	Initialize the phase-space mode.

void	generateIntermediates (bool in)
	Methods to set variables in inheriting classes.

bool	generateIntermediates () const
	Set whether or not the intermediates are included.

void	hasOneLoopME (bool in)
	Whether or not the one loop matrix element is implemented.

void	hasRealEmissionME (bool in)
	Whether or not the real emission matrix element is implemented.

void	epsilonPS (Energy in)
	Set the epsilon parameter.

void	clearModes ()
	Clear the models.

unsigned int	numberModes () const
	Number of decay modes.

tPhaseSpaceModePtr	mode (unsigned int ix)
	Pointer to a mode.

tcPhaseSpaceModePtr	mode (unsigned int ix) const
	Pointer to a mode.

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)

Standard Interfaced functions.
vector< InvEnergy2 >	coupling_
	The coupling.

vector< int >	incoming_
	PDG code for the incoming baryons.

vector< int >	outgoing_
	PDG code for the outgoing baryons.

vector< double >	maxWeight_
	max weight

string	setUpDecayMode (string arg)
	Set the parameters for a decay mode.

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

virtual void	doinitrun ()
	Initialize this object.

RadiativeDoublyHeavyBaryonDecayer &	operator= (const RadiativeDoublyHeavyBaryonDecayer &)=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.

virtual void	halfHalfVectorCoupling (int imode, Energy m0, Energy m1, Energy m2, Complex &A1, Complex &A2, Complex &B1, Complex &B2) const
	Coupling Members.

virtual void	threeHalfHalfVectorCoupling (int imode, Energy m0, Energy m1, Energy m2, Complex &A1, Complex &A2, Complex &A3, Complex &B1, Complex &B2, Complex &B3) const
	Couplings for spin- $\frac12$ to spin- $\frac32$ and a vector.

Additional Inherited Members
Public Types inherited from Herwig::DecayIntegrator
enum	MEOption { Initialize , Calculate , Terminate }
	Enum for the matrix element option. More...

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

Static Public Member Functions inherited from Herwig::Baryon1MesonDecayerBase
static void	Init ()
	Standard Init function used to initialize the interfaces.

Static Public Member Functions inherited from Herwig::DecayIntegrator
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 ()

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 RadiativeDoublyHeavyBaryonDecayer class is designed for the radiative decay of a baryon containing a heavy quark to another baryon containing a heavy quark.

There are four types of transition supported

$\frac12^+\to\frac12^+$ $M1$ transition
\[\mathcal{M} = i f \epsilon^{\epsilon^*_2\delta p_0p_1} \bar{B} \gamma_5.B^*_\delta\bar{\gamma }^{\delta}\]
$\frac32^+\to\frac12^+$ $M1$ transition
\[\mathcal{M} = i f \epsilon^{\epsilon^*_2\delta p_0p_1} \bar{B} \gamma_5 \gamma_^\delta B^*\]

where $p_0$ is the momentum of the decaying baryon $B^*$ is the field for the decaying baryon, $B$ is the field for the baryon produced in the decay and $\epsilon_2$ is the polarization vector for the outgoing photon.

Definition at line 30 of file RadiativeDoublyHeavyBaryonDecayer.h.

Member Function Documentation

◆ clone()

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

inlineprotectedvirtual

Make a simple clone of this object.

Returns: a pointer to the new object.

Implements ThePEG::InterfacedBase.

Definition at line 123 of file RadiativeDoublyHeavyBaryonDecayer.h.

◆ dataBaseOutput()

virtual void Herwig::RadiativeDoublyHeavyBaryonDecayer::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::Baryon1MesonDecayerBase.

◆ doinit()

virtual void Herwig::RadiativeDoublyHeavyBaryonDecayer::doinit ( )

protectedvirtual

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

Exceptions

InitException if object could not be initialized properly.

Reimplemented from ThePEG::InterfacedBase.

◆ doinitrun()

virtual void Herwig::RadiativeDoublyHeavyBaryonDecayer::doinitrun ( )

protectedvirtual

Initialize this object.

Called in the run phase just before a run begins.

Reimplemented from Herwig::DecayIntegrator.

◆ fullclone()

virtual IBPtr Herwig::RadiativeDoublyHeavyBaryonDecayer::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 129 of file RadiativeDoublyHeavyBaryonDecayer.h.

◆ halfHalfVectorCoupling()

virtual void Herwig::RadiativeDoublyHeavyBaryonDecayer::halfHalfVectorCoupling	(	int	imode,
		Energy	m0,
		Energy	m1,
		Energy	m2,
		Complex &	A1,
		Complex &	A2,
		Complex &	B1,
		Complex &	B2
	)		const

protectedvirtual

Coupling Members.

Couplings for spin- $\frac12$ to spin- $\frac12$ and a vector.

Parameters

imode	The mode
m0	The mass of the decaying particle.
m1	The mass of the outgoing baryon.
m2	The mass of the outgoing meson.
A1	The coupling $A_1$ described above.
A2	The coupling $A_2$ described above.
B1	The coupling $B_1$ described above.
B2	The coupling $B_2$ described above.

Reimplemented from Herwig::Baryon1MesonDecayerBase.

◆ Init()

static void Herwig::RadiativeDoublyHeavyBaryonDecayer::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.

◆ modeNumber()

virtual int Herwig::RadiativeDoublyHeavyBaryonDecayer::modeNumber	(	bool &	cc,
		tcPDPtr	parent,
		const tPDVector &	children
	)		const

virtual

Which of the possible decays is required.

Parameters

cc	Is this mode the charge conjugate
parent	The decaying particle
children	The decay products

Implements Herwig::DecayIntegrator.

◆ operator=()

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

privatedelete

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

◆ persistentInput()

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

Function used to write out object persistently.

Parameters

os	the persistent output stream written to.

◆ threeHalfHalfVectorCoupling()

virtual void Herwig::RadiativeDoublyHeavyBaryonDecayer::threeHalfHalfVectorCoupling	(	int	imode,
		Energy	m0,
		Energy	m1,
		Energy	m2,
		Complex &	A1,
		Complex &	A2,
		Complex &	A3,
		Complex &	B1,
		Complex &	B2,
		Complex &	B3
	)		const

protectedvirtual

Couplings for spin- $\frac12$ to spin- $\frac32$ and a vector.

Parameters

imode	The mode
m0	The mass of the decaying particle.
m1	The mass of the outgoing baryon.
m2	The mass of the outgoing meson.
A1	The coupling $A_1$ described above.
A2	The coupling $A_2$ described above.
A3	The coupling $A_3$ described above.
B1	The coupling $B_1$ described above.
B2	The coupling $B_2$ described above.
B3	The coupling $B_3$ described above.

Reimplemented from Herwig::Baryon1MesonDecayerBase.

Member Data Documentation

◆ coupling_

vector<InvEnergy2> Herwig::RadiativeDoublyHeavyBaryonDecayer::coupling_

private

The coupling.

Definition at line 170 of file RadiativeDoublyHeavyBaryonDecayer.h.

◆ incoming_

vector<int> Herwig::RadiativeDoublyHeavyBaryonDecayer::incoming_

private

PDG code for the incoming baryons.

Definition at line 175 of file RadiativeDoublyHeavyBaryonDecayer.h.

◆ maxWeight_

vector<double> Herwig::RadiativeDoublyHeavyBaryonDecayer::maxWeight_

private

max weight

Definition at line 185 of file RadiativeDoublyHeavyBaryonDecayer.h.

◆ outgoing_

vector<int> Herwig::RadiativeDoublyHeavyBaryonDecayer::outgoing_

private

PDG code for the outgoing baryons.

Definition at line 180 of file RadiativeDoublyHeavyBaryonDecayer.h.

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

RadiativeDoublyHeavyBaryonDecayer.h

Public Member Functions

Protected Member Functions

Standard Interfaced functions.

Functions used by the persistent I/O system.

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ clone()

◆ dataBaseOutput()

◆ doinit()

◆ doinitrun()

◆ fullclone()

◆ halfHalfVectorCoupling()

◆ Init()

◆ modeNumber()

◆ operator=()

◆ persistentInput()

◆ persistentOutput()

◆ threeHalfHalfVectorCoupling()

Member Data Documentation

◆ coupling_

◆ incoming_

◆ maxWeight_

◆ outgoing_