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Natural dark matter from type I string theory

King, Stephan F. and Roberts, Jonathan P. (2007) Natural dark matter from type I string theory Journal of High Energy Physics, 1, (24), pp. 1-20. (doi:10.1088/1126-6708/2007/01/024).

Record type: Article

Abstract

We study neutralino dark matter within a semi-realistic type I string model, where supersymmetry breaking arises from F-terms of moduli fields parameterised in terms of Goldstino angles, which automatically gives rise to non-universal soft third sfamily and gaugino masses. We study the fine-tuning sensitivities for dark matter and electroweak symmetry breaking across the parameter space of the type I string model, and compare the results to a similar analysis in the non-universal MSSM. Within the type I string model we find that neutralino dark matter can be naturally implemented in the bulk region, the Z0 resonance region and the maximally tempered Bino/Wino/Higgsino region, in agreement with the results of the non-universal MSSM analysis. We also find that in the type I string model the "well-tempered" Bino/Wino region is less fine-tuned than in the MSSM, whereas the co-annihilation region exhibits a significantly higher degree of fine-tuning than in the MSSM.

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More information

Published date: 4 January 2007
Keywords: supersymmetry phenomenology, cosmology of theories beyond the sm, intersecting branes models

Identifiers

Local EPrints ID: 57392
URI: http://eprints.soton.ac.uk/id/eprint/57392
PURE UUID: 04be48fa-4d57-41bb-82b3-fedd93fcbd2b

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Date deposited: 14 Aug 2008
Last modified: 17 Jul 2017 14:29

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Contributors

Author: Stephan F. King
Author: Jonathan P. Roberts

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