The baryon-dark matter ratio via moduli decay after Affleck-Dine baryogenesis

Journal Article · Tue Nov 01 04:00:00 EDT 2011 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2011/11/012· OSTI ID:22279699

Kane, Gordon; Yu, Hai-Bo ^[1]; Shao, Jing; Watson, Scott ^[2]

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1. Michigan Center for Theoretical Physics, University of Michigan, Ann Arbor, MI 48109 (United States)
2. 201 Physics Building, Syracuse University, Syracuse, NY 13244 (United States)

Low-scale supersymmetry breaking in string motivated theories implies the presence of O(100 TeV) scale moduli, which generically lead to a significant modification of the history of the universe prior to Big Bang Nucleosynthesis. Such an approach implies a non-thermal origin for dark matter resulting from scalar decay, where the lightest supersymmetric particle can account for the observed dark matter relic density. We study the further effect of the decay on the baryon asymmetry of the universe, and find that this can satisfactorily address the problem of the over-production of the baryon asymmetry by the Affleck-Dine mechanism in the MSSM. Remarkably, there is a natural connection between the baryon and dark matter abundances today, which leads to a solution of the 'Cosmic Coincidence Problem'.

• OSTI ID: 22279699
• Journal Information: Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 11 Vol. 2011; ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ASYMMETRY
BARYONS
DENSITY
MATHEMATICAL SOLUTIONS
NONLUMINOUS MATTER
NUCLEOSYNTHESIS
SCALARS
SPARTICLES
STANDARD MODEL
SUPERSYMMETRY
SYMMETRY BREAKING
TEV RANGE
UNIVERSE