SUSY Constraints, Relic Density, and Very Early Universe

Details SUSY Constraints, Relic Density, and Very Early Universe SUSY Constraints, Relic Density, and Very Early Universe

2009-06-02

arxiv.org/abs/0906.0368v2

JHEP 1005:051,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 5 figures. v2: new figures added

Scientific paper

10.1007/JHEP05(2010)051

The sensitivity of the lightest supersymmetric particle relic density calculation to different cosmological scenarios is discussed. In particular, we investigate the effects of modifications of the expansion rate and of the entropy content in the Early Universe. These effects, even with no observational consequences, can still drastically modify the relic density constraints on the SUSY parameter space. We suggest general parametrizations to evaluate such effects, and derive also constraints from Big-Bang nucleosynthesis. We show that using the relic density in the context of supersymmetric constraints requires a clear statement of the underlying cosmological model assumptions to avoid misinterpretations. On the other hand, we note that combining the relic density calculation with the eventual future discoveries at the LHC will hopefully shed light on the Very Early Universe properties.

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