Right-Handed Sneutrino Condensate Cold Dark Matter and the Baryon-to-Dark Matter Ratio
arXiv:hep-ph/0609126 · doi:10.1088/1475-7516/2007/01/001
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 (H_{u}L)^{2} flat direction. The correct density of RH sneutrino dark matter is obtained if the reheating temperature is in the range 10^{6}-10^{8} 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.
21 pages LaTeX, version to be published in JCAP
References in corpus (4)
Cited by in corpus (40)
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