title: New experimental limits on non-Newtonian forces in the micrometer range.
abstract: We report measurements of the short-range forces between two macroscopic gold-coated plates using a torsion pendulum. The force is measured for separations between 0.7 and 7 μm and is well described by a combination of the Casimir force, including the finite-temperature correction, and an electrostatic force due to patch potentials on the plate surfaces. We use our data to place constraints on the Yukawa-type "new" forces predicted by theories with extra dimensions. We establish a new best bound for force ranges 0.4-4 μm and, for forces mediated by gauge bosons propagating in (4+n) dimensions and coupling to the baryon number, extract a (4+n)-dimensional Planck scale lower limit of M(*)>70 TeV.
authors: Department of Physics, Yale University, P.O. Box 208120, New Haven, Connecticut 06520-8120, USA. alex@harvard.physics.edu
authors: A O
authors: AO
authors: Sushkov
authors: W J
authors: WJ
authors: Kim
authors: D A R
authors: DA
authors: Dalvit
authors: S K
authors: SK
authors: Lamoreaux