Axino Dark Matter from Q-Balls in Affleck-Dine Baryogenesis and the {omega}{sub b}-{omega}{sub DM} Coincidence Problem

Journal Article · Fri Apr 20 00:00:00 EDT 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.98.161304· OSTI ID:20951249

Roszkowski, Leszek ^[1]; Seto, Osamu ^[2]

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1. Department of Physics and Astronomy, University of Sheffield, Sheffield (United Kingdom)
2. Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QJ (United Kingdom)

We show that the {omega}{sub b}-{omega}{sub 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}{sub b} and {omega}{sub DM} is a direct consequence of the (sub-)GeV scale of the mass of the axino, while the reheating temperature T{sub R} must be low, some 10{sup 2} GeV, or less.

• OSTI ID: 20951249
• Journal Information: Physical Review Letters, Vol. 98, Issue 16; Other Information: DOI: 10.1103/PhysRevLett.98.161304; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
GEV RANGE
MASS
NONLUMINOUS MATTER
PARTICLE DECAY
PARTICLE PRODUCTION