MICROSCOPE’s constraint on a short-range fifth force

The MICROSCOPE experiment was designed to test the weak equivalence principle in space, by comparing low-frequency dynamics of cylindrical "free-falling" masses controlled electrostatic forces. We use data taken during technical sessions aimed at estimating stiffness MICROSCOPE's sensors constrain a short-range Yukawa deviation from Newtonian gravity. take advantage fact that limit small displacements, gravitational interaction (both and Yukawa-like) between nested cylinders is linear, thus simply characterised stiffness. By measuring total forces acting on mass as it moves, with theoretical (expected dominate), priori possible infer constraints potential parameters. However, we find measurement uncertainties are dominated gold wires used control electric charge masses, though their related indeed smaller than expected Moreover, non-zero unaccounted for depends instrument's configuration, hinting presence patch-field effects. Added significant model, they only allow poor potential. This not surprising, this measurement, but analysis first step new experimental searches non-Newtonian gravity space.