A new equivalence principle test using a rotating torsion balance

We used a rotating torsion balance to test the equivalence principle for Yukawa ranges from 1 m to infinity. The torsion balance was mounted on a turntable rotating with constant angular velocity. On the torsion pendulum Beryllium and Titanium test bodies were installed in a composition dipole configuration. A violation of the equivalence principle would yield to a differential acceleration of the two materials towards a source mass. For two months of data, we measured this acceleration with a sensitivity of 5 x 10 -13 cm/s2 toward local topological features and the Earth.; In addition, we analyzed the differential acceleration data toward astronomical sources. We measured the differential acceleration toward the Sun in a seven month long data run. The measured differential acceleration with a 1sigma uncertainty is Dasun&parl0;Ti-Be&parr0; =1.1+/-1.6x10 -13cm/s2. Furthermore, we measured the differential accelerations toward the galactic center and the cosmic microwave background dipole direction. The values with their associated 1sigma uncertainties are Dagal&parl0;Ti-Be&parr0; =0.4+/-1.7x10 -13cm/s2 and DaCMB&parl0;Ti-Be&parr0; =-0.6+/-1.5x10 -13cm/s2.