Axino dark matter from Q-balls in Affleck-Dine baryogenesis and the b - DM coincidence problem

Abstract

We show that the b - 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 b and DM is a direct consequence of the (sub-)GeV scale of the mass of the axino.

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