Constraints on axionlike dark matter with masses down to $10^{-23}$ eV/c$^2$. (arXiv:1902.04246v1 [astro-ph.CO])

Constraints on axionlike dark matter with masses down to $10^{-23}$ eV/c$^2$. (arXiv:1902.04246v1 [astro-ph.CO])
<a href="http://arxiv.org/find/astro-ph/1/au:+Terrano_W/0/1/0/all/0/1">William A. Terrano</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Adelberger_E/0/1/0/all/0/1">Eric G. Adelberger</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hagedorn_C/0/1/0/all/0/1">Charles A. Hagedorn</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Heckel_B/0/1/0/all/0/1">Blayne R. Heckel</a>

We analyzed an 6.7-year span of data from a rotating torsion-pendulum
containing $approx 10^{23}$ polarized electrons to search for the “wind”
arising from ultralight, axionlike dark matter with masses between $10^{-23}$
and $10^{-18}$ eV/c$^2$. Over most of this range we obtain a 95% confidence
limit $F_{rm a}/C_{rm e} geq 1 times 10^{15}$ eV on the axionlike decay
constant.

We analyzed an 6.7-year span of data from a rotating torsion-pendulum
containing $approx 10^{23}$ polarized electrons to search for the “wind”
arising from ultralight, axionlike dark matter with masses between $10^{-23}$
and $10^{-18}$ eV/c$^2$. Over most of this range we obtain a 95% confidence
limit $F_{rm a}/C_{rm e} geq 1 times 10^{15}$ eV on the axionlike decay
constant.

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