Probing EWSB Naturalness in Unified SUSY Models with Dark Matter

Abstract

We have studied Electroweak Symmetry Breaking (EWSB) fine-tuning in the context of two unified Supersymmetry scenarios: the Constrained Minimal Supersymmetric Model (CMSSM) and models with Non-Universal Higgs Masses (NUHM), in light of current and upcoming direct detection dark matter experiments. We consider both those models that satisfy a one-sided bound on the relic density of neutralinos, ${\Omega }_{\chi }{h}^2<0.12$, and also the subset that satisfy the two-sided bound in which the relic density is within the 2 sigma best fit of WMAP7 + BAO + H0 data. We find that current direct detection searches for dark matter probe the least fine-tuned regions of parameter-space, or equivalently those of lowest Higgs mass parameter $\mu$, and will tend to probe progressively more and more fine-tuned models, though the trend is more pronounced in the CMSSM than in the NUHM. Additionally, we examine several subsets of model points, categorized by common mass hierarchies; $M_{χ_0} \sim M_{χ^\pm}, M_{χ_0} \sim M_{\stau}, M_{χ_0} \sim M_{\stop_1}$, the light and heavy Higgs poles, and any additional models classified as "other"; the relevance of these mass hierarchies is their connection to the preferred neutralino annihilation channel that determines the relic abundance. For each of these subsets of models we investigated the degree of fine-tuning and discoverability in current and next generation direct detection experiments.

26 pages, 10 figures. v2: references added. v3: matches published version

References in corpus (12)

• New results from DAMA/LIBRA
• Results from a Search for Light-Mass Dark Matter with a P-type Point Contact Germanium Detector
• micrOMEGAs2.0: a program to calculate the relic density of dark matter in a generic model
• Estimate of BR(B -> X_s gamma) at O(alpha_s^2)
• Results from a Low-Energy Analysis of the CDMS II Germanium Data
• Hadronic Uncertainties in the Elastic Scattering of Supersymmetric Dark Matter
• Improved Spin-Dependent WIMP Limits from a Bubble Chamber
• Improved Limits on Spin-Dependent WIMP-Proton Interactions from a Two Liter CF${}_3$I Bubble Chamber
• Varying the Universality of Supersymmetry-Breaking Contributions to MSSM Higgs Boson Masses
• Light Higgses at the Tevatron and at the LHC and Observable Dark Matter in SUGRA and D Branes
• Predictive Signatures of Supersymmetry: Measuring the Dark Matter Mass and Gluino Mass with Early LHC data
• Natural Implementation of Neutralino Dark Matter

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• Naturalness and GUT Scale Yukawa Coupling Ratios in the CMSSM
• MSSM A-funnel and the Galactic Center Excess: Prospects for the LHC and Direct Detection Experiments
• Simple Hidden Sector Dark Matter
• Well-Mixed Dark Matter and the Higgs
• Exploring the Hadronic Axion Window via Delayed Neutralino Decay to Axinos at the LHC