Explaining $Ω_{Baryon} \approx 0.2 Ω_{Dark}$ through the synthesis of ordinary matter from mirror matter: a more general analysis

R. Foot; R. R. Volkas

doi:10.1103/PhysRevD.69.123510

paper

Explaining $Ω_{B a r y o n} \approx 0.2 Ω_{D a r k}$ through the synthesis of ordinary matter from mirror matter: a more general analysis

arXiv:hep-ph/0402267 · doi:10.1103/PhysRevD.69.123510

Abstract

The emerging cosmological picture is of a spatially flat universe composed predominantly of three components: ordinary baryons ( $Ω_{B} \approx 0.05$ ), non-baryonic dark matter ( $Ω_{D a r k} \approx 0.22$ ) and dark energy ( $Ω_{Λ} \approx 0.7$ ). We recently proposed that ordinary matter was synthesised from mirror matter, motivated by the argument that the observed similarity of $Ω_{B}$ and $Ω_{D a r k}$ suggests an underlying similarity between the fundamental properties of ordinary and dark matter particles. In this paper we generalise the previous analysis by considering a wider class of effective operators that non-gravitationally couple the ordinary and mirror sectors. We find that while all considered operators imply $Ω_{D a r k} =$ few $\times Ω_{B}$ , only a subset quantitatively reproduce the observed ratio $Ω_{B} / Ω_{D a r k} \approx 0.20$ . The $\sim 1$ eV mass scale induced through these operators hints at a connection with neutrino oscillation physics.

minor changes, some references added, about 10 pages

Explaining ΩBaryon​≈0.2ΩDark​ through the synthesis of ordinary matter from mirror matter: a more general analysis

Abstract

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Explaining $Ω_{B a r y o n} \approx 0.2 Ω_{D a r k}$ through the synthesis of ordinary matter from mirror matter: a more general analysis