Abstract

We analyzed a 6.7-yr span of data from a rotating torsion-pendulum containing ≈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 much of this range we set a 95%confidence limit F_{a}/C_{e}>2×10^{15} eV on the axionlike decay constant.

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