Paradigms and Scenarios for the Dark Matter Phenomenon
  Well known scaling laws among the structural properties of the dark and the
luminous matter in disc systems are too complex to be arisen by two inert
components that just share the same gravitational field. This brings us to
critically focus on the 30-year-old paradigm, that, resting on a priori
knowledge of the nature of Dark Matter (DM), has led us to a restricted number
of scenarios, especially favouring the collisionless $\Lambda$ Cold Dark Matter
one. Motivated by such observational evidence, we propose to resolve the dark
matter mystery by following a new Paradigm: the nature of DM must be
guessed/derived by deeply analyzing the properties of the dark and luminous
mass distribution at galactic scales. The immediate application of this
paradigm leads us to propose the existence of a direct interaction between Dark
and Standard Model particles, which has finely shaped the inner regions of
galaxies.
