ThePEG::V2PPDecayer Class Reference

The V2PPDecayer class performs the decay of a vector meson into two pseudo-scalars according to a flat phase space. More...

#include <V2PPDecayer.h>

Inheritance diagram for ThePEG::V2PPDecayer:

List of all members.

Public Member Functions
Standard constructors and destructors.
virtual	~V2PPDecayer ()
	Destructor.
Virtual functions required by the Decayer class.
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 double	reweight (const DecayMode &dm, const Particle &parent, const ParticleVector &children) const
	Give a weight to a phase space point.
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 Public Member Functions
static void	Init ()
	Standard Init function used to initialize the interfaces.
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.
Private Member Functions
V2PPDecayer &	operator= (const V2PPDecayer &)
	Private and non-existent assignment operator.
Private Attributes
tPPtr	grandParent
	The grand parent in case reweighting should be done.
tPPtr	sibling
	The decaying particles sibling in case reweighting should be done.
Static Private Attributes
static ClassDescription < V2PPDecayer >	initV2PPDecayer
	Describe a concrete class with persistent data.

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Detailed Description

The V2PPDecayer class performs the decay of a vector meson into two pseudo-scalars according to a flat phase space.

If, however the decaying particle comes from a pseudo-scalar and has only one sibling which is a pseudo-scalar (or a photon) the decay is reweighted with ( for photon) of the angle between one of the decay products and its grand parent.

See also:

The interfaces defined for V2PPDecayer.

FlatDecayer

ParticleData

Definition at line 30 of file V2PPDecayer.h.

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Member Function Documentation

virtual bool ThePEG::V2PPDecayer::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::FlatDecayer.

virtual ParticleVector ThePEG::V2PPDecayer::decay	(	const DecayMode &	dm,
		const Particle &	p
	)			const [virtual]

Perform a decay for a given DecayMode and a given Particle instance.

Parameters:

	dm	the DecayMode describing the decay.
	p	the Particle instance to be decayed.

Returns:

a ParticleVector containing the decay products.

Reimplemented from ThePEG::FlatDecayer.

virtual double ThePEG::V2PPDecayer::reweight	(	const DecayMode &	dm,
		const Particle &	parent,
		const ParticleVector &	children
	)			const [virtual]

Give a weight to a phase space point.

To be overridden by subclasses. For a given decay mode, dm, decaying parent particle and decayproducts, children, distributed according to a flat distribution in phase space, return a weight (less or equal to unity) modifying the flat distribution to the desired one. Note that the chosen phase space point may be rejected, but the chosen decay channel will not. This means that the weight returned by this function does not influence the branching ratios.

Reimplemented from ThePEG::FlatDecayer.

void ThePEG::V2PPDecayer::persistentOutput

(

PersistentOStream &

os

)

const

Function used to write out object persistently.

Parameters:

os

the persistent output stream written to.

Reimplemented from ThePEG::Decayer.

void ThePEG::V2PPDecayer::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.

Reimplemented from ThePEG::Decayer.

virtual IBPtr ThePEG::V2PPDecayer::clone

(

)

const [protected, virtual]

Make a simple clone of this object.

Returns:

a pointer to the new object.

Reimplemented from ThePEG::FlatDecayer.

virtual IBPtr ThePEG::V2PPDecayer::fullclone

(

)

const [protected, 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::FlatDecayer.

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

• V2PPDecayer.h