Torsion-balance search for ultralow-mass bosonic dark matter

We used a stationary torsion balance with beryllium-aluminum composition dipole to search for ultralow-mass bosonic dark matter coupled baryon minus lepton number. set 95% confidence limits on the coupling constant ${g}_{\mathrm{B}\ensuremath{-}\mathrm{L}}$ bosons masses between ${10}^{\ensuremath{-}18}$ and ${10}^{\ensuremath{-}16}\text{ }\text{ }\mathrm{eV}/{c}^{2}$ best performance at ${m}_{\mathrm{DM}}=8\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}18}\text{ constraining ${g}_{\mathrm{B}\ensuremath{-}\mathrm{L}}(\ensuremath{\hbar}c{)}^{\ensuremath{-}1/2}<1\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}25}$. This provides complimentary limit equivalence-principle experiments that as force-mediating particles.