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

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

2006-08-01

arxiv.org/abs/hep-ph/0608013v2

Phys.Rev.Lett.98:161304,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, no figure, final PRL version

Scientific paper

10.1103/PhysRevLett.98.161304

We show that the $\Omega_b - \Omega_{DM}$ 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 $\Omega_b$ and $\Omega_{DM}$ is a direct consequence of the (sub-)GeV scale of the mass of the axino.

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