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A direct road to Majorana fields

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arxiv 0806.1690 v4 pith:RAN3K5R5 submitted 2008-06-10 hep-th

A direct road to Majorana fields

classification hep-th
keywords majoranaformalismfour-componentotherparticlesspinorssupersymmetrictheories
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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