Abstract
We determine the prospects for direct and indirect detection of thermal relic neutralinos in supersymmetric theories with multi-TeV squarks and sleptons. We consider the concrete example of the focus point region of minimal supergravity, but our results are generically valid for all models with decoupled scalars and mixed Bino-Higgsino or Higgsino-like dark matter. We determine the parameter space consistent with a 125 GeV Higgs boson including 3-loop corrections in the calculation of the Higgs mass. These corrections increase ${m}_{h}$ by 1--3 GeV, lowering the preferred scalar mass scale and decreasing the fine-tuning measure in these scenarios. We then systematically examine prospects for dark matter direct and indirect detection. Direct detection constraints do not exclude these models, especially for $\ensuremath{\mu}<0$. At the same time, the scenario generically predicts spin-independent signals just beyond current bounds. We also consider indirect detection with neutrinos, gamma rays, antiprotons, and antideuterons. Current IceCube neutrino constraints are competitive with direct detection, implying bright prospects for complementary searches with both direct and indirect detection.
Highlights
There are many experimental constraints on weak-scale supersymmetry
Note that gaugino masses enter the scalar mass renormalization group (RG) equations, but scalar masses do not enter the gaugino mass RG equations; letting M1/2 and m0 denote generic gaugino and scalar masses, respectively, the hierarchy m0 M1/2 is stable under RG evolution, whereas M1/2 m0 is not
Large supersymmetry-breaking parameters are generically associated with significant fine-tuning of the Higgs potential, simple correlations in high-scale scalar mass parameters may reduce the sensitivity of the weak scale to variations in these parameters, providing a naturalness motivation for such models
Summary
There are many experimental constraints on weak-scale supersymmetry. These exclude generic supersymmetric theories in which all superpartners have masses below a TeV, and focus attention on the remaining supersymmetric theories that are both phenomenologically viable and natural. We consider the focus point region of minimal supergravity (mSUGRA), but the results are far more general: when the scalar superpartners are very heavy, they effectively decouple from dark matter phenomenology, and the details of the multi-TeV spectrum are largely irrelevant. We consider prospects for dark matter detection in the region of parameter space preferred by the Higgs mass and other phenomenological constraints, including direct searches for supersymmetric particles. IV, we discuss both spin-independent and spindependent direct detection and show that, contrary to claims in the literature, perfectly viable regions of parameter space remain, especially for μ < 0 Crucial to this conclusion is the small value for the strange quark content of the nucleon preferred by both lattice calculations and chiral perturbation theory results.
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