Explaining Ωbaryon≈0.2Ωdark through the synthesis of ordinary matter from mirror matter:: A more general analysis -: art. no. 123510

The emerging cosmological picture is of a spatially flat universe composed predominantly of three components: ordinary baryons (Omega(B)approximate to0.05), nonbaryonic dark matter (Omega(dark)approximate to0.22) and dark energy (Omega(Lambda)approximate to0.7). We recently proposed that ordinary matter was synthesized from mirror matter, motivated by the argument that the observed similarity of Omega(B) and Omega(dark) suggests an underlying similarity between the fundamental properties of ordinary and dark matter particles. In this paper we generalize the previous analysis by considering a wider class of effective operators that nongravitationally couple the ordinary and mirror sectors. We find that while all considered operators imply Omega(dark)=fewxOmega(B), only a subset quantitatively reproduce the observed ratio Omega(B)/Omega(dark)approximate to0.20. The similar to1 eV mass scale induced through these operators hints at a connection with neutrino oscillation physics.