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Symmetry 2010, 2(4), 1776-1809; doi:10.3390/sym2041776

A Direct Road to Majorana Fields

Department of Physics, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland
Received: 1 October 2010 / Revised: 18 October 2010 / Accepted: 22 October 2010 / Published: 27 October 2010
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A concise discussion of spin-1/2 field equations with a special focus on Majorana spinors is presented. The Majorana formalism which describes massive neutral fermions by the help of two-component or four-component 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 two-component and the four-component 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.
Keywords: symmetry and conservation laws; non-standard-model neutrinos; real and complex spinor representations symmetry and conservation laws; non-standard-model neutrinos; real and complex spinor representations
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Aste, A. A Direct Road to Majorana Fields. Symmetry 2010, 2, 1776-1809.

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