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Title

Neutralino dark matter from heavy axino decay

AuthorsChoi, Ki-Young CSIC; Kim, Jihn E.; Lee, Hyun Min; Seto, Osamu CSIC
KeywordsHigh Energy Physics - Phenomenology
Astrophysics
Issue Date19-Jun-2008
PublisherAmerican Physical Society
CitationarXiv:0801.0491v2 [hep-ph]
Phys. Rev. D 77:123501, 2008
http://dx.doi.org/10.1103/PhysRevD.77.123501
SeriesIFT-UAM/CSIC -08-01
AbstractWe consider cosmological consequences of a heavy axino, decaying to the neutralino in R-parity conserving models. The importance and influence of the axino decay on the resultant abundance of neutralino dark matter depends on the lifetime and the energy density of axino. For a high reheating temperature after inflation, copiously produced axinos dominate the energy density of the universe and its decay produces a large amount of entropy. As a bonus, we obtain that the upper bound on the reheating temperature after inflation via gravitino decay can be moderated, because the entropy production by the axino decay more or less dilutes the gravitinos.
DescriptionSubmitted on 3 Jan 2008 (v1), last revised 19 Jun 2008 (this version, v2).-- 7 pages, 4 figures; references added, published version in Phys. Rev. D.-- PACS numbers: 95.35.+d, 98.80.Cq.
URIhttp://hdl.handle.net/10261/5613
DOI10.1103/PhysRevD.77.123501
ISSN0556-2821
Appears in Collections:(IFT) Artículos

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