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Axino dark matter from Q-balls in Affleck-Dine baryogenesis and the $Ω_b - Ω_{DM}$ coincidence problem

Leszek Roszkowski·Osamu Seto
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Abstract

We show that the $Ω_b - Ω_{DM}$ coincidence can naturally be explained in a framework where axino cold dark matter is predominantly produced in non-thermal processes involving decays of Q-balls formed in Affleck-Dinebaryogenesis. In this approach the similarity between $Ω_b$ and $Ω_{DM}$ is a direct consequence of the (sub-)GeV scale of the mass of the axino.

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Leszek Roszkowski, Osamu Seto. 2007-04-26. Axino dark matter from Q-balls in Affleck-Dine baryogenesis and the $Ω_b - Ω_{DM}$ coincidence problem. https://doi.org/10.1103/physrevlett.98.161304

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