Abstract:
A scheme is considered in which bispinors are nothing more than a convenient language for describing information contained in a field of Dirac matrices. The scheme differs fundamentally from the tetrad method of introducing bispinors in Riemannian space. The scheme leads to a nontrivial classification of spin 1/2 particles corresponding to near-vacuum fields of Dirac matrices. A possible connection between the obtained results and various attempts to unify interactions is discussed.