Dark matter physics — Ultralight axion-like dark matter

Ultralow-mass axion-like dark matter would induce an oscillating neutron electric dipole moment or an axion-wind spin-precession effect visible in the ratio of ultracold-neutron and ¹⁹⁹Hg precession frequencies.

No signal consistent with dark matter was observed for axion masses from 10⁻²⁴ to 10⁻¹⁷ eV.

Why it matched: similar wording

A submillimetre magnet levitated in a superconducting trap would detect the oscillating force from ultralight dark matter coupled to baryon-minus-lepton number.

With a force sensitivity of 0.2 fN/√Hz, the search found no evidence of a signal in the mass range 1.10360–1.10485 × 10⁻¹³ eV/c², giving a most stringent coupling limit of g(B−L) ≲ 2.98 × 10⁻²¹.

Why it matched: similar wording