A direct road to Majorana fields
Abstract
A concise discussion of spin1/2 field equations with a special focus on Majorana spinors is presented. The Majorana formalism which describes massive neutral fermions by the help of twocomponent or fourcomponent spinors is of fundamental importance for the understanding of mathematical aspects of supersymmetric and other extensions of the Standard Model of particle physics, which may play an increasingly important role at the beginning of the LHC era. The interplay between the twocomponent and the fourcomponent formalism is highlighted in an introductory way. Majorana particles are predicted both by grand unified theories, in which these particles are neutrinos, and by supersymmetric theories, in which they are photinos, gluinos and other states.
 Publication:

arXiv eprints
 Pub Date:
 June 2008
 arXiv:
 arXiv:0806.1690
 Bibcode:
 2008arXiv0806.1690A
 Keywords:

 High Energy Physics  Theory
 EPrint:
 30 pages, LATEX, one section expanded and references added