The PionPhotonCurrent class implements the decay current for \(\pi^{\pm,0} \gamma\) via intermediate \(\rho,\omega,\phi,\omega^\prime\). More...

#include <PionPhotonCurrent.h>

Inheritance diagram for Herwig::PionPhotonCurrent:

[legend]

Public Member Functions
	PionPhotonCurrent ()
	The default constructor.

Methods for the construction of the phase space integrator.
virtual bool	createMode (int icharge, tcPDPtr resonance, FlavourInfo flavour, unsigned int imode, PhaseSpaceModePtr mode, unsigned int iloc, int ires, PhaseSpaceChannel phase, Energy upp)
	Complete the construction of the decay mode for integration.classes inheriting from this one.

virtual tPDVector	particles (int icharge, unsigned int imode, int iq, int ia)
	The particles produced by the current.

virtual vector< LorentzPolarizationVectorE >	current (tcPDPtr resonance, FlavourInfo flavour, const int imode, const int ichan, Energy &scale, const tPDVector &outgoing, const vector< Lorentz5Momentum > &momenta, DecayIntegrator::MEOption meopt) const
	Hadronic current.

virtual void	constructSpinInfo (ParticleVector decay) const
	Construct the SpinInfo for the decay products.

virtual bool	accept (vector< int > id)
	Accept the decay.

virtual unsigned int	decayMode (vector< int > id)
	Return the decay mode number for a given set of particles in the current.

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

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

unsigned int	numberOfModes () const
	Return the number of modes handled by this current.

void	decayModeInfo (unsigned int imode, int &iq, int &ia) const
	Information on a decay mode.

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::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::WeakCurrent
void	addDecayMode (int iq, int ia)
	Add a decay mode to the list.

void	setInitialModes (unsigned int nmodes)
	Set initial number of modes.

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< Energy >	resMasses_
	Mass for the resonances.

vector< Energy >	resWidths_
	Widths for the resonances.

vector< InvEnergy >	amp_
	Amplitudes for couplings for the resonances.

vector< double >	phase_
	Amplitudes for couplings for the resonances.

vector< complex< InvEnergy > >	couplings_
	Couplings for the resonances.

Energy	mpi_
	The pion mass.

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

PionPhotonCurrent &	operator= (const PionPhotonCurrent &)=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 ThePEG::InterfacedBase
enum	InitState

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

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

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 PionPhotonCurrent class implements the decay current for \(\pi^{\pm,0} \gamma\) via intermediate \(\rho,\omega,\phi,\omega^\prime\).

It inherits from the WeakCurrent class and implements the hadronic current.

The model is based on the one from Phys.Rev. D93 (2016) no.9, 092001.

See also: The interfaces defined for PionPhotonCurrent.

Definition at line 26 of file PionPhotonCurrent.h.

Member Function Documentation

◆ accept()

virtual bool Herwig::PionPhotonCurrent::accept ( vector< int > id )

virtual

Accept the decay.

Checks the meson against the list

Parameters

id	The id's of the particles in the current.

Returns: Can this current have the external particles specified.

Implements Herwig::WeakCurrent.

◆ clone()

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

protectedvirtual

Make a simple clone of this object.

Returns: a pointer to the new object.

Implements ThePEG::InterfacedBase.

◆ constructSpinInfo()

virtual void Herwig::PionPhotonCurrent::constructSpinInfo ( ParticleVector decay ) const

virtual

Construct the SpinInfo for the decay products.

Reimplemented from Herwig::WeakCurrent.

◆ createMode()

virtual bool Herwig::PionPhotonCurrent::createMode	(	int	icharge,
		tcPDPtr	resonance,
		FlavourInfo	flavour,
		unsigned int	imode,
		PhaseSpaceModePtr	mode,
		unsigned int	iloc,
		int	ires,
		PhaseSpaceChannel	phase,
		Energy	upp
	)

virtual

Complete the construction of the decay mode for integration.classes inheriting from this one.

This method is purely virtual and must be implemented in the classes inheriting from WeakCurrent.

Parameters

icharge	The total charge of the outgoing particles in the current.
resonance	If specified only include terms with this particle
flavour	Information on the required flavours of the quarks
imode	The mode in the current being asked for.
mode	The phase space mode for the integration
iloc	The location of the of the first particle from the current in the list of outgoing particles.
ires	The location of the first intermediate for the current.
phase	The prototype phase space channel for the integration.
upp	The maximum possible mass the particles in the current are allowed to have.

Returns: Whether the current was sucessfully constructed.

Implements Herwig::WeakCurrent.

◆ current()

virtual vector< LorentzPolarizationVectorE > Herwig::PionPhotonCurrent::current	(	tcPDPtr	resonance,
		FlavourInfo	flavour,
		const int	imode,
		const int	ichan,
		Energy &	scale,
		const tPDVector &	outgoing,
		const vector< Lorentz5Momentum > &	momenta,
		DecayIntegrator::MEOption	meopt
	)		const

virtual

Hadronic current.

This method is purely virtual and must be implemented in all classes inheriting from this one.

Parameters

resonance	If specified only include terms with this particle
flavour	Information on the required flavours of the quarks
imode	The mode
ichan	The phase-space channel the current is needed for.
scale	The invariant mass of the particles in the current.
outgoing	The particles produced in the decay
momenta	The momenta of the particles produced in the decay
meopt	Option for the calculation of the matrix element

Returns: The current.

Implements Herwig::WeakCurrent.

◆ dataBaseOutput()

virtual void Herwig::PionPhotonCurrent::dataBaseOutput	(	ofstream &	os,
		bool	header,
		bool	create
	)		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
create	Whether or not to add a statement creating the object

Reimplemented from Herwig::WeakCurrent.

◆ decayMode()

virtual unsigned int Herwig::PionPhotonCurrent::decayMode ( vector< int > id )

virtual

Return the decay mode number for a given set of particles in the current.

Checks the meson against the list

Parameters

id	The id's of the particles in the current.

Returns: The number of the mode

Implements Herwig::WeakCurrent.

◆ doinit()

virtual void Herwig::PionPhotonCurrent::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 ThePEG::InterfacedBase.

◆ fullclone()

virtual IBPtr Herwig::PionPhotonCurrent::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.

◆ Init()

static void Herwig::PionPhotonCurrent::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.

◆ operator=()

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

privatedelete

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

◆ particles()

virtual tPDVector Herwig::PionPhotonCurrent::particles	(	int	icharge,
		unsigned int	imode,
		int	iq,
		int	ia
	)

virtual

The particles produced by the current.

This just returns the pseudoscalar meson.

Parameters

icharge	The total charge of the particles in the current.
imode	The mode for which the particles are being requested
iq	The PDG code for the quark
ia	The PDG code for the antiquark

Returns: The external particles for the current.

Implements Herwig::WeakCurrent.

◆ persistentInput()

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

Function used to write out object persistently.

Parameters

os	the persistent output stream written to.

Member Data Documentation

◆ amp_

vector<InvEnergy> Herwig::PionPhotonCurrent::amp_

private

Amplitudes for couplings for the resonances.

Definition at line 202 of file PionPhotonCurrent.h.

◆ couplings_

vector<complex<InvEnergy> > Herwig::PionPhotonCurrent::couplings_

private

Couplings for the resonances.

Definition at line 212 of file PionPhotonCurrent.h.

◆ mpi_

Energy Herwig::PionPhotonCurrent::mpi_

private

The pion mass.

Definition at line 217 of file PionPhotonCurrent.h.

◆ phase_

vector<double> Herwig::PionPhotonCurrent::phase_

private

Amplitudes for couplings for the resonances.

Definition at line 207 of file PionPhotonCurrent.h.

◆ resMasses_

vector<Energy> Herwig::PionPhotonCurrent::resMasses_

private

Mass for the resonances.

Definition at line 192 of file PionPhotonCurrent.h.

◆ resWidths_

vector<Energy> Herwig::PionPhotonCurrent::resWidths_

private

Widths for the resonances.

Definition at line 197 of file PionPhotonCurrent.h.

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

PionPhotonCurrent.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

◆ accept()

◆ clone()

◆ constructSpinInfo()

◆ createMode()

◆ current()

◆ dataBaseOutput()

◆ decayMode()

◆ doinit()

◆ fullclone()

◆ Init()

◆ operator=()

◆ particles()

◆ persistentInput()

◆ persistentOutput()

Member Data Documentation

◆ amp_

◆ couplings_

◆ mpi_

◆ phase_

◆ resMasses_

◆ resWidths_