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).
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
Identifiers
Catalogue record
Export record
Altmetrics
Contributors
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.