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We have studied Electroweak Symmetry Breaking (EWSB) fine-tuning in thecontext of two unified Supersymmetry scenarios: the Constrained MinimalSupersymmetric Model (CMSSM) and models with Non-Universal Higgs Masses (NUHM),in light of current and upcoming direct detection dark matter experiments. Weconsider both those models that satisfy a one-sided bound on the relic densityof neutralinos, $\Omega_{\chi} h^2 < 0.12$, and also the subset that satisfythe two-sided bound in which the relic density is within the 2 sigma best fitof WMAP7 + BAO + H0 data. We find that current direct detection searches fordark matter probe the least fine-tuned regions of parameter-space, orequivalently those of lowest Higgs mass parameter $\mu$, and will tend to probeprogressively more and more fine-tuned models, though the trend is morepronounced in the CMSSM than in the NUHM. Additionally, we examine severalsubsets of model points, categorized by common mass hierarchies; $M_{\chi_0}\sim M_{\chi^\pm}, M_{\chi_0} \sim M_{\stau}, M_{\chi_0} \sim M_{\stop_1}$, thelight and heavy Higgs poles, and any additional models classified as "other";the relevance of these mass hierarchies is their connection to the preferredneutralino annihilation channel that determines the relic abundance. For eachof these subsets of models we investigated the degree of fine-tuning anddiscoverability in current and next generation direct detection experiments.

Probing EWSB Naturalness in Unified SUSY Models with Dark Matter