Natural Dark Matter from Type I String Theory

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 $\stau$ bulk region, the $Z^0$ 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 $\stau$ co-annihilation region exhibits a significantly higher degree of fine-tuning than in the MSSM.

22 pages, 5 figures

References in corpus (4)

• The Well-Tempered Neutralino
• Naturalness Priors and Fits to the Constrained Minimal Supersymmetric Standard Model
• de Sitter String Vacua from Perturbative Kahler Corrections and Consistent D-terms
• Natural Implementation of Neutralino Dark Matter

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• Collider signals and neutralino dark matter detection in relic-density-consistent models without universality
• A New Measure of Fine Tuning
• Pseudo-Dirac Bino Dark Matter
• Exploring compressed supersymmetry with same-sign top quarks at the Large Hadron Collider
• Neutralino Dark Matter in the USSM
• The top squark-mediated annihilation scenario and direct detection of dark matter in compressed supersymmetry
• The Fine-Tuning Price of Neutralino Dark Matter in Models with Non-Universal Higgs Masses
• WIMP dark matter in bulk viscous non-standard cosmologies
• Spontaneous dark-matter mass generation along cosmological attractors in string theory
• FIMP Dark Matter in bulk viscous non-standard cosmologies
• Natural Dark Matter
• Natural SUSY Dark Matter: A Window on the GUT Scale