  Mass dimension one fermionic fields are prime candidates to describe dark
matter, due to their intrinsic neutral nature, as they are constructed as
eigenstates of the charge conjugation operator with dual helicity. To formulate
the meaning of the darkness, the fermion-photon coupling is scrutinized with a
Pauli-like interaction, and the path integral is then formulated from the phase
space constraint structure. Ward-Takahashi-like identities and Schwinger-Dyson
equations, together with renormalizability, are employed to investigate a
phenomenological mechanism to avoid external light signals. Accordingly, the
non-polarized pair annihilation and Compton-like processes are shown to vanish
at the limit of small scattering angles even if considering 1-loop radiative
corrections, reinforcing the dark matter interpretation. However, dark matter
interactions with nucleons are still possible. Motivated by recent
nucleon-recoil experiments to detect dark matter, we furnish a consistent
theoretical setup to describe interaction with the photon compatible with the
prevalence of darkness.
