Journal
PHYSICS LETTERS B
Volume 701, Issue 5, Pages 660-666Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2011.06.037
Keywords
Axion; Supersymmetry; R-parity breaking; Early universe; Dark matter
Funding
- German Science Foundation (DFG) within the Collaborative Research Centre [676]
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A small breaking of R-parity reconciles thermal leptogenesis, gravitino dark matter and primordial nucleosynthesis. We find that the same breaking relaxes cosmological bounds on the axion multiplet. Naturally expected spectra become allowed and bounds from late particle decays become so weak that they are superseded by bounds from non-thermal axion production. In this sense, the strong CP problem serves as an additional motivation for broken R-parity. (C) 2011 Elsevier B.V. All rights reserved.
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