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SUSY constraints from relic density: High sensitivity to pre-BBN expansion rate
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear and Particle Physics.
2008 (English)In: Physics Letters B, ISSN 0370-2693, Vol. 669, no 1, 46-51 p.Article in journal (Refereed) Published
Abstract [en]

The sensitivity of the lightest supersymmetric particle relic density calculation to the variation of the cosmological expansion rate before nucleosynthesis is discussed. Such a modification of the expansion rate, even extremely modest and with no consequence on the cosmological observations can greatly, enhance the calculated relic density, and therefore change the constraints on the SUSY parameter space drastically. We illustrate this variation in two examples of SUSY models, and show that it is unsafe to use the lower bound of the WMAP limits in order to constrain supersymmetry. We therefore suggest to use only the upper value Omega(DM)h(2) < 0.135. (C) 2008 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2008. Vol. 669, no 1, 46-51 p.
Keyword [en]
Supersymmetry, Constraints, Relic density
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-107066DOI: 10.1016/j.physletb.2008.09.032ISI: 000260876400010OAI: oai:DiVA.org:uu-107066DiVA: diva2:227623
Available from: 2009-07-15 Created: 2009-07-15 Last updated: 2009-07-15Bibliographically approved

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