Roszkowski L, Seto O. Axino dark matter from Q-balls in Affleck-Dine baryogenesis and the Omega b-Omega DM coincidence problem.
PHYSICAL REVIEW LETTERS 2007;
98:161304. [PMID:
17501411 DOI:
10.1103/physrevlett.98.161304]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2006] [Revised: 02/08/2007] [Indexed: 05/15/2023]
Abstract
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 TR must be low, some 10(2) GeV, or less.
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