B-ball Baryogenesis and the Baryon to Dark Matter Ratio
高能物理 - 唯象学
2009-10-31 v3 天体物理学
摘要
We demonstrate that B-ball decay in the MSSM can naturally solve the puzzle of why the densities of baryons and dark matter in the Universe are similar. This requires that the B-balls survive thermalization and decay below the freeze-out temperature of the neutralino LSP, typically 1-10GeV. It is shown that this can happen if the baryon asymmetry originates from a squark condensate along the d=6 u^{c}d^{c}d^{c} D-flat direction of the MSSM scalar potential. For this to work the reheating temperature after inflation must be no greater than 10^3-10^5 GeV.
引用
@article{arxiv.hep-ph/9803380,
title = {B-ball Baryogenesis and the Baryon to Dark Matter Ratio},
author = {Kari Enqvist and John McDonald},
journal= {arXiv preprint arXiv:hep-ph/9803380},
year = {2009}
}
备注
39 pages, LaTeX, Final version (To be published in Nuc.Phys.B)