ThePEG::Helicity::RhoDMatrix Class Reference

The RhoDMatrix class is designed to implement the storage of the rho and D matrices which are required for the spin correlation algorithm. More...

#include <RhoDMatrix.h>

List of all members.

Public Member Functions
Standard constructors and destructors.
	RhoDMatrix ()
	Default constructor with undefined spin.
	RhoDMatrix (PDT::Spin inspin, bool average=true)
	Standard constructor giving the spin as 2s+1.
Access matrix elements.
Complex	operator() (size_t ix, size_t iy) const
	Return an element of the matrix.
Complex &	operator() (size_t ix, size_t iy)
	Set an element of the matrix.
void	normalize ()
	renormalise the matrix so it has unit trace
Access the spin.
PDT::Spin	iSpin () const
	Get the spin.
Private Types
enum	{ MAXSPIN = 5 }
	Spin matrix size.
Private Attributes
PDT::Spin	_spin
	2s+1 for the particle.
size_t	_ispin
	Storage of 2s+1 for speed.
Complex	_matrix [MAXSPIN][MAXSPIN]
	Storage for the matrix allowing up to spin 2 particles.
Friends
ostream &	operator<< (ostream &os, const RhoDMatrix &rd)
	Output the spin density matrix for debugging purposes.

---

Detailed Description

The RhoDMatrix class is designed to implement the storage of the rho and D matrices which are required for the spin correlation algorithm.

The matrix stores the spin as 2s+1.

Author:

Peter Richardson

Definition at line 28 of file RhoDMatrix.h.

---

Constructor & Destructor Documentation

ThePEG::Helicity::RhoDMatrix::RhoDMatrix	(	PDT::Spin	inspin,
		bool	average = true
	)			[inline]

Standard constructor giving the spin as 2s+1.

The matrix starts out averaged, unless the second argument is false, when it is zeroed.

Definition at line 43 of file RhoDMatrix.h.

References _ispin, and _matrix.

---

Member Function Documentation

PDT::Spin ThePEG::Helicity::RhoDMatrix::iSpin

(

)

const [inline]

Get the spin.

The spin is returned as 2J+1 in units of hbar/2.

Definition at line 100 of file RhoDMatrix.h.

References _spin.

---

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

• RhoDMatrix.h