Right-handed sneutrino condensate cold dark matter and the baryon-to-dark matter ratio.

McDonald, John (2007) Right-handed sneutrino condensate cold dark matter and the baryon-to-dark matter ratio. Journal of Cosmology and Astroparticle Physics, 2007 (01). 001. ISSN 1475-7516

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Abstract

The similarity of the observed densities of baryons and cold dark matter suggests that they have a common or related origin. This can be understood in the context of the MSSM with right-handed (RH) sneutrinos if cold dark matter is due to a d = 4 flat direction condensate of very weakly coupled RH sneutrino LSPs and the baryon asymmetry is generated by Affleck–Dine leptogenesis along the d = 4 (HuL)2 flat direction. The correct density of RH sneutrino dark matter is obtained if the reheating temperature is in the range 106–108 GeV. A cold dark matter isocurvature perturbation close to present observational bounds is likely in the case of inflation driven by a D-term or by an F-term with suppressed Hubble corrections to the A-terms. An observable baryon isocurvature perturbation is also possible in the case of D-term inflation models.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Cosmology and Astroparticle Physics
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
ID Code:
11390
Deposited By:
Deposited On:
14 Aug 2008 12:28
Refereed?:
Yes
Published?:
Published
Last Modified:
09 Aug 2020 23:52