Abstract
A null experimental test of the Newtonian inverse-square law at submillimeter range using a torsion pendulum was presented. Under the dual modulations of both the expected signal and the gravitational torque for calibration, our data concluded with 95% confidence that no new forces were observed and any gravitational-strength Yukawa forces () must have a length scale , agreeing well with the latest result of the Eöt-wash group. Our result sets a unification energy scale of for the two compactified extra space dimensions with the same size .
- Received 7 January 2007
DOI:https://doi.org/10.1103/PhysRevLett.98.201101
©2007 American Physical Society