Randomized trial excludes high densities of axionic dark matter in specific models, suggesting revised parameters.
Cold dark matter in the Milky Way halo may have structure defined by flows with low velocity dispersion. The Axion Dark Matter eXperiment high resolution channel is especially sensitive to axions in such low velocity dispersion flows. Results from a combined power spectra analysis of the high resolution channel axion search are presented along with a discussion of the assumptions underlying such an analysis. We exclude Kim-Shifman-Vainshtein-Zakharov axion dark matter densities of ρ0.2 GeV/cm³ and Dine-Fischler-Srednicki-Zhitnitskii densities of ρ1.4 GeV/cm³ over a mass range of mₐ=3.3 μeV to 3.69 μeV for models having velocity dispersions of Δβ3×10^-6.
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Hoskins et al. (2011) studied this question.
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