Symmetric Lorentz-Minkowski, Antisymmetric Dirac-Majorana

Abstract: We show a nice symmetric/antisymmetric relation between the four vector Lorentz transformation and the Dirac spinor one in the Majorana representation. From the spinor one, we exhibit the antisymmetric pending of the symmetric Minkowski metric. We then rewrite the Dirac equation in various ways exploiting group properties induced by these relations, and this without complex numbers. We show also a nice relation with a five dimensional metric. When done, we will see that the traditional complex electromagnetic coupling could be handled also without complex numbers by just considering two coupled real fields instead of one complex field. Finally, we will show that going toward six or ten dimensional spacetime would be more natural from a group point of view.