Abstract
We used a continuously rotating torsion balance instrument to measure the acceleration difference of beryllium and titanium test bodies towards sources at a variety of distances. Our result improves limits on equivalence-principle violations with ranges from 1 m to by an order of magnitude. The Eötvös parameter is . By analyzing our data for accelerations towards the center of the Milky Way we find equal attractions of Be and Ti towards galactic dark matter, yielding . Space-fixed differential accelerations in any direction are limited to less than with 95% confidence.
- Received 4 October 2007
DOI:https://doi.org/10.1103/PhysRevLett.100.041101
©2008 American Physical Society
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