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Symmetry 2015, 7(2), 788-814; https://doi.org/10.3390/sym7020788

Supersymmetry with Radiatively-Driven Naturalness: Implications for WIMP and Axion Searches

1
Department of Physics and Astronomy, University of Oklahoma, Norman, OK 73019, USA
2
Department of Physics, University of Wisconsin, Madison, WI 53706, USA
*
Author to whom correspondence should be addressed.
Academic Editor: David Cline
Received: 17 March 2015 / Accepted: 14 May 2015 / Published: 28 May 2015
(This article belongs to the Special Issue Supersymmetry and Dark Matter)
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Abstract

By insisting on naturalness in both the electroweak and quantum chromodynamics (QCD) sectors of the minimal supersymmetric standard model (MSSM), the portrait for dark matter production is seriously modified from the usual weakly interacting massive particle (WIMP) miracle picture. In supersymmetry (SUSY) models with radiatively-driven naturalness (radiative natural SUSY or radiative natural SUSY (RNS)) which include a Dine–Fischler–Srednicki–Zhitnitsky (DFSZ)-like solution to the strong charge-conjugation-parity (CP) and SUSY \(\mu\) problems, dark matter is expected to be an admixture of both axions and higgsino-like WIMPs. The WIMP/axion abundance calculation requires simultaneous solution of a set of coupled Boltzmann equations which describe quasi-stable axinos and saxions. In most of parameter space, axions make up the dominant contribution of dark matter although regions of WIMP dominance also occur. We show the allowed range of Peccei-Quinn (PQ) scale \(f_a\) and compare to the values expected to be probed by the axion dark matter search experiment (ADMX) axion detector in the near future. We also show WIMP detection rates, which are suppressed from usual expectations, because now WIMPs comprise only a fraction of the total dark matter. Nonetheless, ton-scale noble liquid detectors should be able to probe the entirety of RNS parameter space. Indirect WIMP detection rates are less propitious since they are reduced by the square of the depleted WIMP abundance. View Full-Text
Keywords: supersymmetry; dark matter; WIMPs; axions; naturalness supersymmetry; dark matter; WIMPs; axions; naturalness
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Bae, K.J.; Baer, H.; Barger, V.; Savoy, M.R.; Serce, H. Supersymmetry with Radiatively-Driven Naturalness: Implications for WIMP and Axion Searches. Symmetry 2015, 7, 788-814.

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