Terrano W A, Adelberger E G, Hagedorn C A, Heckel B R
Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Box 354290, Seattle, Washington 98195-4290, USA.
Phys Rev Lett. 2019 Jun 14;122(23):231301. doi: 10.1103/PhysRevLett.122.231301.
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.
