ThePEG::WeakToHadronsDecayer Class Reference

The WeakToHadronsDecayer class inherits from QuarksToHadronsDecayer and can performs weak decays of taus and charmed and bottom hadrons. More...

#include <WeakToHadronsDecayer.h>

Inheritance diagram for ThePEG::WeakToHadronsDecayer:

Public Member Functions
Virtual functions required by the Decayer and
QuarksToHadronsDecayer classes.
virtual bool	accept (const DecayMode &dm) const
	Check if this decayer can perfom the decay specified by the given decay mode. More...
virtual double	reweight (const Particle &parent, const PVector &children) const
	Called by QuarksToHadronsDecayer::distribute() to reweight the default flat phase spece. More...
virtual PVector	getHadrons (int Nh, tcPDVector quarks) const
	Produce Nh hadrons from the specified quarks. More...
Functions used by the persistent I/O system.
void	persistentOutput (PersistentOStream &os) const
	Function used to write out object persistently. More...
void	persistentInput (PersistentIStream &is, int version)
	Function used to read in object persistently. More...
Public Member Functions inherited from ThePEG::QuarksToHadronsDecayer
virtual int	getN (Energy m0, Energy summq, int Nq) const
	Get the number of hadrons to be produced, given the mass of the decaying particle, m0, and the number, Nq and summed masses of the quarks, summq.
virtual void	distribute (const Particle &parent, PVector &children) const
	Distribute the produced children in phase space. More...
int	fixedN () const
	Return the fixed number of hadrons to be produced. More...
int	minN () const
	Return the minimum number of hadrons to be produced.
double	c1 () const
	Return the parameter used for the multiplicity distriution.
Energy	c2 () const
	Return the parameter used for the multiplicity distriution.
double	c3 () const
	Return the parameter used for the multiplicity distriution.
tcFlavGenPtr	flavourGenerator () const
	Return a pointer to the flavour generator to be used.
	QuarksToHadronsDecayer ()
	Default constructor.
virtual	~QuarksToHadronsDecayer ()
	Destructor.
virtual ParticleVector	decay (const DecayMode &dm, const Particle &p) const
	Perform a decay for a given DecayMode and a given Particle instance. More...
void	persistentOutput (PersistentOStream &os) const
	Function used to write out object persistently. More...
void	persistentInput (PersistentIStream &is, int version)
	Function used to read in object persistently. More...
Public Member Functions inherited from ThePEG::Decayer
Ptr< Amplitude >::pointer	amplitude () const
	Return an amplitude associated with this decay matrix element. More...
virtual bool	needsFullStep () const
	Return true if this Decayer need to access the full current step when a particle is decayed. More...
virtual ParticleVector	decay (const DecayMode &dm, const Particle &p, Step &step) const
	Perform a decay for a given DecayMode and a given Particle instance. More...
virtual double	brat (const DecayMode &dm, const ParticleData &pd, double oldbrat) const
	Calculate branching ratio. More...
virtual double	brat (const DecayMode &dm, const Particle &p, double oldbrat) const
	Calculate branching ratio. More...
virtual ParticleVector	getChildren (const DecayMode &dm, const Particle &parent) const
	Produce the children. More...
virtual void	finalBoost (const Particle &parent, const ParticleVector &children) const
	Boost the decay products. More...
virtual void	setScales (const Particle &parent, const ParticleVector &children) const
	Set the scales. More...
void	persistentOutput (PersistentOStream &os) const
	Function used to write out object persistently. More...
void	persistentInput (PersistentIStream &is, int version)
	Function used to read in object persistently. More...
Public Member Functions inherited from ThePEG::HandlerBaseT< UseRandom >
double	rnd () const
	Return a simple flat random number in the range ]0,1[.
double	rnd (double xu) const
	Return a simple flat random number in the range ]0,xu[.
double	rnd (double xl, double xu) const
	Return a simple flat random number in the range ]xl,xu[.
bool	rndbool () const
	Return true with 50% probability.
bool	rndbool (double p) const
	Return a true with probability p.
bool	rndbool (double p1, double p2) const
	Return a true with probability p1/(p1+p2).
int	rndsign (double p1, double p2, double p3) const
	Return -1, 0, or 1 with relative probabilities p1, p2, p3.
int	rnd2 (double p0, double p1) const
	Return an integer with probability p /(p0+p1).
int	rnd3 (double p0, double p1, double p2) const
	Return an integer with probability p /(p0+p1+p2).
int	rnd4 (double p0, double p1, double p2, double p3) const
	Return an integer/ with probability p (p0+p1+p2+p3).
long	irnd (long xu=2) const
	Return a simple flat random integrer number in the range [0,xu[.
long	irnd (long xl, long xu) const
	Return a simple flat random integrer number in the range [xl,xu[.
const StandardModelBase &	SM () const
	Return a reference to the object containing the standard model parameters for this run.
tSMPtr	standardModel () const
	Return a pointer to the object containing the standard model parameters for this run.
virtual	~HandlerBaseT ()
	Destructor.
Public Member Functions inherited from ThePEG::Interfaced
virtual	~Interfaced ()
	Empty virtual destructor.
virtual bool	defaultInit ()
	Functions which are to be used during the actual event generation, after the setup is complete. More...
PPtr	getParticle (PID) const
	Create a new Particle instance given a id number.
PDPtr	getParticleData (PID) const
	Return a pointer to the ParticleData object corresponding to the given id number.
bool	used () const
	Returns true if this object has actally been used.
void	useMe () const
	Should be called to indicate that this object has actually been used.
tEGPtr	generator () const
	Return a pointer to the EventGenerator controlling the run. More...
void	persistentOutput (PersistentOStream &os) const
	Function used to write out object persistently. More...
void	persistentInput (PersistentIStream &is, int version)
	Function used to read in object persistently. More...
Public Member Functions inherited from ThePEG::InterfacedBase
virtual	~InterfacedBase ()
	The virtual (empty) destructor;.
string	fullName () const
	Returns the full name of this object including its path, e.g. More...
string	name () const
	Returns the name of this object, without the path.
string	path () const
	Returns the path to this object including the trailing '/'. More...
string	comment () const
	Returns a comment assigned to this object.
void	setup (istream &is)
	Read setup info from a standard istream is. More...
virtual void	debugme () const
	Print out debugging information for this object on std::cerr. More...
void	update ()
	Calls the doupdate() function with recursion prevention.
void	init ()
	Calls the doinit() function with recursion prevention.
virtual bool	preInitialize () const
	Return true if this object needs to be initialized before all other objects (except those for which this function also returns true). More...
void	initrun ()
	Calls the doinitrun() function with recursion prevention.
void	finish ()
	Calls the dofinish() function with recursion prevention.
void	touch ()
	This function should be called every time something in this object has changed in a way that a sanity check with update() is needed.
void	reset ()
	Set the state of this object to uninitialized.
void	clear ()
	Calls reset() and unTouch().
InitState	state () const
	Return the state of initialization of this object.
bool	locked () const
	Return true if the BaseRepository is not allowed to change the state of this object.
bool	touched () const
	Return true if the state of this object has been changed since the last call to update().
void	persistentOutput (PersistentOStream &os) const
	Function used to write out object persistently. More...
void	persistentInput (PersistentIStream &is, int version)
	Function used to read in object persistently. More...
Public Member Functions inherited from ThePEG::Base
virtual	~Base ()
	The virtual destructor.
void	debug () const
	Print out debugging information for this object on std::cerr. More...
Public Member Functions inherited from ThePEG::Pointer::ReferenceCounted
CounterType	referenceCount () const
	Return the reference count.
Public Member Functions inherited from ThePEG::Named
	Named (const string &newName=string())
	Constructor with name.
const string &	name () const
	Return name.
bool	operator== (const Named &other) const
	Test for equality.
bool	operator< (const Named &other) const
	Lexicographical comparison.

Static Public Member Functions
static void	Init ()
	Standard Init function used to initialize the interfaces.
Static Public Member Functions inherited from ThePEG::QuarksToHadronsDecayer
static void	Init ()
	Standard Init function used to initialize the interfaces.
Static Public Member Functions inherited from ThePEG::Decayer
static ParticleVector	DecayParticle (tPPtr parent, Step &step, long maxtry=1000)
	Static function to administer the decay of a particle. More...
static void	Init ()
	Standard Init function used to initialize the interfaces.
Static Public Member Functions inherited from ThePEG::HandlerBase
static void	Init ()
	Standard Init function used to initialize the interface.
Static Public Member Functions inherited from ThePEG::Interfaced
static void	Init ()
	Standard Init function.
Static Public Member Functions inherited from ThePEG::InterfacedBase
static void	Init ()
	Standard Init function.
Static Public Member Functions inherited from ThePEG::Base
static void	Init ()
	The standard Init function used to initialize the interfaces. More...

Protected Member Functions
Clone Methods.
virtual IBPtr	clone () const
	Make a simple clone of this object. More...
virtual IBPtr	fullclone () const
	Make a clone of this object, possibly modifying the cloned object to make it sane. More...
Clone Methods.
Protected Member Functions inherited from ThePEG::Interfaced
void	reporeg (IBPtr object, string name) const
	Register the given object in the Repository with the given name in a subdirectory with the same name as this object. More...
template<typename PtrT >
bool	setDefaultReference (PtrT &ptr, string classname, string objectname)
	If the pointer, ptr, to an object is not set, create an object of class classname and register it with the Repository with the given objectname in a sib-directory with the same name as this object.
	Interfaced ()
	Protected default constructor.
	Interfaced (const string &newName)
	Protected constructor taking a name as argument.
	Interfaced (const Interfaced &i)
	Protected copy-constructor.
void	setGenerator (tEGPtr generator)
	Protected function to reset the generator pointer, required for automatic decayer generation in Herwig++ BSM models.
Protected Member Functions inherited from ThePEG::InterfacedBase
	InterfacedBase ()
	Protected default constructor.
	InterfacedBase (string newName)
	Protected constructor with the name given as argument.
	InterfacedBase (const InterfacedBase &i)
	Protected copy-constructor.
virtual void	readSetup (istream &is)
	Read setup info from a standard istream is. More...
virtual void	doupdate ()
	Check sanity of the object during the setup phase. More...
virtual void	doinit ()
	Initialize this object after the setup phase before saving an EventGenerator to disk. More...
virtual void	doinitrun ()
	Initialize this object. More...
virtual void	dofinish ()
	Finalize this object. More...
virtual IVector	getReferences ()
	Return a vector of all pointers to Interfaced objects used in this object. More...
virtual void	rebind (const TranslationMap &)
	Rebind pointer to other Interfaced objects. More...
Protected Member Functions inherited from ThePEG::Pointer::ReferenceCounted
	ReferenceCounted ()
	Default constructor.
	ReferenceCounted (const ReferenceCounted &)
	Copy-constructor.
ReferenceCounted &	operator= (const ReferenceCounted &)
	Assignment.
Protected Member Functions inherited from ThePEG::Named
const Named &	operator= (const Named &other)
	Assignment.
const string &	name (const string &newName)
	Set new name.

Private Member Functions
WeakToHadronsDecayer &	operator= (const WeakToHadronsDecayer &)
	Private and non-existent assignment operator.

Static Private Attributes
static ClassDescription< WeakToHadronsDecayer >	initWeakToHadronsDecayer
	Describe a concrete class with persistent data.

Additional Inherited Members
Public Types inherited from ThePEG::InterfacedBase
enum	InitState { initializing = -1, uninitialized = 0, initialized = 1, runready = 2 }
	Enumeration reflecting the state of an InterfacedBase object. More...
Public Types inherited from ThePEG::Pointer::ReferenceCounted
typedef unsigned int	CounterType
	The integer type used for counting.
Public Attributes inherited from ThePEG::Pointer::ReferenceCounted
const unsigned long	uniqueId
	The unique ID. More...
Static Protected Member Functions inherited from ThePEG::Interfaced
static void	registerRepository (IBPtr)
	Register an Interfaced object with the Repository.
static void	registerRepository (IBPtr, string newName)
	Register an Interfaced object with the Repository, giving it a name.

Detailed Description

The WeakToHadronsDecayer class inherits from QuarksToHadronsDecayer and can performs weak decays of taus and charmed and bottom hadrons.

The intermediate W can either decay leptonically in which case standard V-A matrix element is used, or it can decay into quarks in which case the conversion into quarks is performed as for the QuarkToHadronsDecayer base class. In both cases the W decay products should be specified first. The spectator system can either be specified in terms of hadrons or in terms of quarks which will be collapsed into a single hadron.

See also

The interfaces defined for WeakToHadronsDecayer.

Definition at line 31 of file WeakToHadronsDecayer.h.

Member Function Documentation

virtual bool ThePEG::WeakToHadronsDecayer::accept ( const DecayMode &  dm ) const

virtual

Check if this decayer can perfom the decay specified by the given decay mode.

Parameters

dm	the DecayMode describing the decay.

Returns

true if this decayer can handle the given mode, otherwise false.

Reimplemented from ThePEG::QuarksToHadronsDecayer.

virtual IBPtr ThePEG::WeakToHadronsDecayer::clone ( ) const

protectedvirtual

Make a simple clone of this object.

Returns

a pointer to the new object.

Reimplemented from ThePEG::QuarksToHadronsDecayer.

virtual IBPtr ThePEG::WeakToHadronsDecayer::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::QuarksToHadronsDecayer.

virtual PVector ThePEG::WeakToHadronsDecayer::getHadrons ( int  Nh, tcPDVector  quarks  ) const

virtual

Produce Nh hadrons from the specified quarks.

The last quark is considered to be a spectator quark.

Reimplemented from ThePEG::QuarksToHadronsDecayer.

void ThePEG::WeakToHadronsDecayer::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.

void ThePEG::WeakToHadronsDecayer::persistentOutput

(

PersistentOStream &

os

)

const

Function used to write out object persistently.

Parameters

os	the persistent output stream written to.

virtual double ThePEG::WeakToHadronsDecayer::reweight ( const Particle &  parent, const PVector &  children  ) const

virtual

Called by QuarksToHadronsDecayer::distribute() to reweight the default flat phase spece.

Can be overridden by sub-classes and should return a number between 0 and 1. This version returns 1.

Reimplemented from ThePEG::QuarksToHadronsDecayer.

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

• WeakToHadronsDecayer.h