B-ball baryogenesis and the baryon to dark matter ratio

Enqvist, Kari and McDonald, John (1999) B-ball baryogenesis and the baryon to dark matter ratio. Nuclear Physics B, 538 (1-2). pp. 321-350. ISSN 0550-3213

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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.

Item Type: Journal Article
Journal or Publication Title: Nuclear Physics B
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100/3106
Departments: Faculty of Science and Technology > Physics
ID Code: 83232
Deposited By: ep_importer_pure
Deposited On: 29 Nov 2016 09:54
Refereed?: Yes
Published?: Published
Last Modified: 11 Feb 2020 09:10
URI: https://eprints.lancs.ac.uk/id/eprint/83232

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