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Simplified Models of Mixed Dark Matter

Cheung, Clifford and Sanford, David (2014) Simplified Models of Mixed Dark Matter. Journal of Cosmology and Astroparticle Physics, 2014 (2). Art. No. 011. ISSN 1475-7516. doi:10.1088/1475-7516/2014/02/011.

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We explore simplified models of mixed dark matter (DM), defined here to be a stable relic composed of a singlet and an electroweak charged state. Our setup describes a broad spectrum of thermal DM candidates that can naturally accommodate the observed DM abundance but are subject to substantial constraints from current and upcoming direct detection experiments. We identify "blind spots" at which the DM-Higgs coupling is identically zero, thus nullifying direct detection constraints on spin independent scattering. Furthermore, we characterize the fine-tuning in mixing angles, i.e. well-tempering, required for thermal freeze-out to accommodate the observed abundance. Present and projected limits from LUX and XENON1T force many thermal relic models into blind spot tuning, well-tempering, or both. This simplified model framework generalizes bino-Higgsino DM in the MSSM, singlino-Higgsino DM in the NMSSM, and scalar DM candidates that appear in models of extended Higgs sectors.

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Additional Information:© 2014 The Author(s). Article funded by SCOAP. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Received December 22, 2013; Accepted January 13, 2014; Published February 6, 2014. We are grateful to the Kavli Institute for Theoretical Physics at Santa Barbara and the Aspen Center for Physics, where part of this work was conducted. DS is supported in part by U.S. Department of Energy grant DE-FG02-92ER40701 and by the Gordon and Betty Moore Foundation through Grant No. 776 to the Caltech Moore Center for Theoretical Cosmology and Physics. CC is supported by a DOE Early Career Award DE-SC0010255.
Group:Caltech Theory, Moore Center for Theoretical Cosmology and Physics
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-92ER40701
Gordon and Betty Moore Foundation776
Department of Energy (DOE)DE-SC0010255
Subject Keywords:dark matter theory, dark matter detectors
Issue or Number:2
Classification Code:PACS: 95.35.+d; 12.15.-y; 14.80.Ly; 95.30.Cq; 11.30.Pb; 12.60.Jv
Record Number:CaltechAUTHORS:20131209-084406844
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:42892
Deposited By: Tony Diaz
Deposited On:12 Dec 2013 20:28
Last Modified:10 Nov 2021 16:30

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