An Improved Torsion Balance Test of the Equivalence Principle Towards the Sun
Abstract
We search for violations of the Equivalence Principle towards the Sun using a rotating torsion balance apparatus. We set 95\%-confidence limits on violations with beryllium and aluminum test bodies of η, Be-Al ≤ 2.1 × 10-13. These results are a factor of four improvement of previously reported results towards the Sun and a 20\% improvement on previous torsion balance tests regardless of source.
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