Natural dark matter from type I string theory
Natural dark matter from type I string theory
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.
supersymmetry phenomenology, cosmology of theories beyond the sm, intersecting branes models
1-20
King, Stephan F.
f8c616b7-0336-4046-a943-700af83a1538
Roberts, Jonathan P.
01b8bb6a-a386-4f3c-a9d3-2647148e1bb8
4 January 2007
King, Stephan F.
f8c616b7-0336-4046-a943-700af83a1538
Roberts, Jonathan P.
01b8bb6a-a386-4f3c-a9d3-2647148e1bb8
King, Stephan F. and Roberts, Jonathan P.
(2007)
Natural dark matter from type I string theory.
Journal of High Energy Physics, 1 (24), .
(doi:10.1088/1126-6708/2007/01/024).
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.
Full text not available from this repository.
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
Catalogue record
Date deposited: 14 Aug 2008
Last modified: 14 Aug 2019 17:45
Export record
Altmetrics
Contributors
Author:
Jonathan P. Roberts
University divisions
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics