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B-ball baryogenesis and the baryon to dark matter ratio

Research output: Contribution to Journal/MagazineJournal articlepeer-review

  • Kari Enqvist
  • John McDonald
<mark>Journal publication date</mark>11/01/1999
<mark>Journal</mark>Nuclear Physics B
Issue number1-2
Number of pages30
Pages (from-to)321-350
Publication StatusPublished
<mark>Original language</mark>English


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 1-10 GeV, 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(3-5) GeV.