ThePEG::Helicity::RSFermionSpinInfo Class Reference

The RSFermionSpinInfo class inherits from the SpinInfo class and implements the storage of the basis vector for a spin-3/2 particle. More...

#include <RSFermionSpinInfo.h>

Inheritance diagram for ThePEG::Helicity::RSFermionSpinInfo:

List of all members.

Public Member Functions
virtual EIPtr	clone () const
	Standard clone method.
Standard constructors and destructors.
	RSFermionSpinInfo ()
	Default constructor.
	RSFermionSpinInfo (const Lorentz5Momentum &p, bool time)
	Standard Constructor.
Set and get methods for the basis state.
void	setBasisState (unsigned int hel, const LorentzRSSpinor< SqrtEnergy > &in) const
	Set the basis state, this is production state.
void	setDecayState (unsigned int hel, const LorentzRSSpinor< SqrtEnergy > &in) const
	Set the basis state for the decay.
const LorentzRSSpinor < SqrtEnergy > &	getProductionBasisState (unsigned int hel) const
	Get the basis state for the production for the given helicity, hel (0,1,2,3 as described above.
const LorentzRSSpinor < SqrtEnergy > &	getDecayBasisState (unsigned int hel) const
	Get the basis state for the decay for the given helicity, hel (0,1,2,3 as described above.
virtual void	transform (const LorentzMomentum &, const LorentzRotation &)
	Perform a lorentz rotation of the spin information.
Static Public Member Functions
static void	Init ()
	Standard Init function used to initialize the interfaces.
Private Member Functions
RSFermionSpinInfo &	operator= (const RSFermionSpinInfo &)
	Private and non-existent assignment operator.
Private Attributes
vector< LorentzRSSpinor < SqrtEnergy > >	_productionstates
	Basis states in the frame in which the particle was produced.
vector< LorentzRSSpinor < SqrtEnergy > >	_decaystates
	Basis states in the frame in which the particle decays.
vector< LorentzRSSpinor < SqrtEnergy > >	_currentstates
	Basis states in the current frame of the particle.
bool	_decaycalc
	True if the decay state has been set.
Static Private Attributes
static NoPIOClassDescription < RSFermionSpinInfo >	initRSFermionSpinInfo
	Describe a concrete class without persistent data.

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Detailed Description

The RSFermionSpinInfo class inherits from the SpinInfo class and implements the storage of the basis vector for a spin-3/2 particle.

The basis states are the vector u spinors for a particle and the vector v-spinors for an antiparticle. The barred spinors can be obtained from these.

These basis states should be set by either the matrixelements or decayers which are capable of generating spin correlation information.

The basis states in the rest frame of the particles can then be accessed by the decayers to produce the correct correlations.

N.B. in our convention 0 is the helicity state, 1 is the helicity state, 2 is the helicity state, 3 is the helicity state.

See also:

SpinInfo

Author:

Peter Richardson

Definition at line 42 of file RSFermionSpinInfo.h.

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Constructor & Destructor Documentation

ThePEG::Helicity::RSFermionSpinInfo::RSFermionSpinInfo	(	const Lorentz5Momentum &	p,
		bool	time
	)			[inline]

Standard Constructor.

Parameters:

	p	the production momentum.
	time	true if the particle is time-like.

Definition at line 60 of file RSFermionSpinInfo.h.

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Member Function Documentation

void ThePEG::Helicity::RSFermionSpinInfo::setBasisState	(	unsigned int	hel,
		const LorentzRSSpinor< SqrtEnergy > &	in
	)			const [inline]

Set the basis state, this is production state.

Parameters:

	hel	the helicity (0,1,2,3 as described above.)
	in	the LorentzRSSpinor for the given helicity.

Definition at line 75 of file RSFermionSpinInfo.h.

References _currentstates, and _productionstates.

void ThePEG::Helicity::RSFermionSpinInfo::setDecayState	(	unsigned int	hel,
		const LorentzRSSpinor< SqrtEnergy > &	in
	)			const [inline]

Set the basis state for the decay.

Parameters:

	hel	the helicity (0,1,2,3 as described above.)
	in	the LorentzRSSpinor for the given helicity.

Definition at line 87 of file RSFermionSpinInfo.h.

References _decaycalc, and _decaystates.

const LorentzRSSpinor<SqrtEnergy>& ThePEG::Helicity::RSFermionSpinInfo::getProductionBasisState

(

unsigned int

hel

)

const [inline]

Get the basis state for the production for the given helicity, hel (0,1,2,3 as described above.

)

Definition at line 98 of file RSFermionSpinInfo.h.

References _productionstates.

const LorentzRSSpinor<SqrtEnergy>& ThePEG::Helicity::RSFermionSpinInfo::getDecayBasisState

(

unsigned int

hel

)

const [inline]

Get the basis state for the decay for the given helicity, hel (0,1,2,3 as described above.

)

Definition at line 107 of file RSFermionSpinInfo.h.

References _currentstates, _decaycalc, and _decaystates.

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

• RSFermionSpinInfo.h