New test of the gravitational 1/r2 law at separations down to 52μm

4 years ago

source link: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.124.101101
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We tested the gravitational 1 / r 2 law using a stationary torsion-balance detector and a rotating attractor containing test bodies with both 18-fold and 120-fold azimuthal symmetries that simultaneously tests the 1 / r 2 law at two different length scales. We took data at detector-attractor separations between 52 μ m and 3.0 mm. Newtonian gravity gave an excellent fit to our data, limiting with 95% confidence any gravitational-strength Yukawa interactions to ranges < 38.6 μ m .