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Type: Journal article
Title: On the direct detection of multi-component dark matter: implications of the relic abundance
Author: Herrero-Garcia, J.
Scaffidi, A.
White, M.
Williams, A.G.
Citation: Journal of Cosmology and Astroparticle Physics, 2019; 2019(1):1-21
Publisher: IOP Publishing
Issue Date: 2019
ISSN: 1475-7516
Statement of
Juan Herrero-Garcia, Andre Scaffadi, Martin White and Anthony G. Williams
Abstract: Recently we studied the direct detection of multi-component dark matter with arbitrary local energy densities. Although the generation of the dark matter relic abundance is model-dependent, and in principle could be only indirectly related to direct detection, it is interesting to consider the implications of the former on the latter. In this work we conduct an extended analysis to include constraints from two natural scenarios of dark matter genesis: asymmetric dark matter and thermal freeze-out. In the first (second) case, the dark matter number (energy) densities of the different components are expected to be similar. In the case of thermal freeze-out, we assume that the global energy density scales with the local one. In our numerical analysis we analyse the median sensitivity of direct detection experiments to discriminate a two-component scenario from a one-component one, and also the precision with which dark matter parameters can be extracted. We analyse these generic scenarios for both light and heavy mediators. We find that most scenarios have a relatively suppressed maximum median sensitivity compared to the previously studied general cases. We also find that the asymmetric scenario is more promising than the thermal freeze-out one.
Keywords: Dark matter experiments; dark matter theory; dark matter detectors; dark matter simulations
Rights: © 2019 IOP Publishing Ltd and Sissa Medialab
RMID: 0030107525
DOI: 10.1088/1475-7516/2019/01/008
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Appears in Collections:Physics publications

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