Further investigation of mass dimension one fermionic duals

Highlights: • Formalization of the new dual theory for mass dimension one fermions. • General Lorentz preserving spinors dual. • A Clifford algebra approach for the theory of duals. • Automorphisms and orbits of a "tau-deformed" dual and its symmetries. -- Abstract: In this paper we proceed into the next step of formalization of a consistent dual theory for mass dimension one spinors. This task is developed approaching the two different and complementary aspects of such duals, clarifying its algebraic structure and the so called τ-deformation. The former regards the mathematical equivalence of the recent proposed Lorentz preserving dual with the duals of algebraic spinors, from Clifford algebras, showing the consistency and generality of the new dual. Moreover, by revealing its automorphism structure, the hole of the τ-deformation and contrasting the action group orbits with other Lorentz breaking scenarios, we argue that the new mass dimension one dual theory is placed over solid and consistent basis.