Journal
PHYSICAL REVIEW LETTERS
Volume 98, Issue 16, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.98.161304
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We show that the Omega(b)-Omega(DM) coincidence can naturally be explained in a framework where axino is cold dark matter which is predominantly produced in nonthermal processes involving decays of Q-balls formed in Affleck-Dine baryogenesis. In this approach, the similarity of Omega(b) and Omega(DM) is a direct consequence of the (sub-)GeV scale of the mass of the axino, while the reheating temperature T-R must be low, some 10(2) GeV, or less.
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