B-ball Baryogenesis and the Baryon to Dark Matter Ratio

Details B-ball Baryogenesis and the Baryon to Dark Matter Ratio B-ball Baryogenesis and the Baryon to Dark Matter Ratio

1998-03-18

arxiv.org/abs/hep-ph/9803380v3

Nucl.Phys. B538 (1999) 321-350

Physics

High Energy Physics

High Energy Physics - Phenomenology

39 pages, LaTeX, Final version (To be published in Nuc.Phys.B)

Scientific paper

10.1016/S0550-3213(98)00695-6

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.

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