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The emerging cosmological picture is of a spatially flat universe composedpredominantly of three components: ordinary baryons ($\Omega_B \approx 0.05$),non-baryonic dark matter ($\Omega_{Dark} \approx 0.22$) and dark energy($\Omega_{\Lambda} \approx 0.7$). We recently proposed that ordinary matter wassynthesised from mirror matter, motivated by the argument that the observedsimilarity of $\Omega_B$ and $\Omega_{Dark}$ suggests an underlying similaritybetween the fundamental properties of ordinary and dark matter particles. Inthis paper we generalise the previous analysis by considering a wider class ofeffective operators that non-gravitationally couple the ordinary and mirrorsectors. We find that while all considered operators imply $\Omega_{Dark} = $few$\times \Omega_B$, only a subset quantitatively reproduce the observed ratio$\Omega_B/\Omega_{Dark} \approx 0.20$. The $\sim 1$ eV mass scale inducedthrough these operators hints at a connection with neutrino oscillationphysics.Comment: minor changes, some references added, about 10 page

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

Explaining<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>Ω</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">baryon</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mi>≈</mml:mi><mml:mn>0.2</mml:mn><mml:mrow><mml:msub><mml:mrow><mml:mi>Ω</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">dark</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>through the synthesis of ordinary matter from mirror matter: A more general …

ExplainingΩbaryon≈0.2Ωdarkthrough the synthesis of ordinary matter from mirror matter: A more general …