Baryon Asymmetry and Dark Matter

M. Bolz; W. Buchmüller; M. Plümacher

doi:10.1016/S0370-2693(98)01342-2

paper

Baryon Asymmetry and Dark Matter

arXiv:hep-ph/9809381 · doi:10.1016/S0370-2693(98)01342-2

Abstract

We study the implications of a large baryogenesis temperature, $T_{B} = O (1 0^{10}$ GeV), on the mass spectrum of superparticles in supersymmetric extensions of the standard model. Models with a neutralino as lightest superparticle (LSP) are excluded. A consistent picture is obtained with the gravitino as LSP, followed by a higgsino-like neutralino (NSP). Gravitinos with masses from 10 to 100 GeV may be the dominant component of dark matter.

10 pages, 2 figures included, eq. (13) replaced by leading order approximation