Unified picture of ordinary and dark matter genesis

Dark matter can be constituted by the baryons of mirror world, parallel hidden sector which has the same (or similar) microphysics as that of the observable world. We discuss a mechanism based on the B - L and CP violating out-of-equilibrium particle processes between ordinary and mirror sectors that could generate baryon asymmetries in both worlds, in comparable amounts, within the range ΩB/ ΩB ∼ 1-10, and thus naturally explain the conspiracy between the baryonic and dark matter fractions in the Universe. Particle interactions between two sectors can be also relevant for a direct detection of dark matter and in addition could induce interesting processes of the ordinary particle oscillations in their mirror partners. Cosmological implications are also discussed.