text: 282,69,1440428521118048256,3327515352,M.P. Ross,"New paper out today by my colleague Erik Shaw! Places new limits on ultra-light dark matter using a torsion balance. The experiment searched through 491,019 different dark matter masses and was up to two times better than past searches (mass dependent). <LINK>",https://arxiv.org/abs/2109.08822,We used a stationary torsion balance with a beryllium-aluminum composition dipole to search for ultra low-mass bosonic dark matter coupled to baryon minus lepton number. We set 95% confidence limits on the coupling constant $g_{\rm B-L}$ for bosons with masses between $10^{-18}$ and $10^{-16}$ eV/$c^2$ with the best performance at $m_{\rm DM} = 8\times 10^{-18}$ eV/$c^2$ constraining $g_{B-L}(\hbar c)^{-1/2} < 1 \times 10^{-25}$. This provides a complimentary limit to equivalence-principle experiments that search for ultra low-mass bosons as force-mediating particles. ,A torsion-balance search for ultra low-mass bosonic dark matter,1,"['New paper out today by my colleague Erik Shaw! Places new limits on ultra-light dark matter using a torsion balance. The experiment searched through 491,019 different dark matter masses and was up to two times better than past searches (mass dependent).\n<LINK>']",21,09,260