Torsion-balance tests of the weak equivalence principle

  title={Torsion-balance tests of the weak equivalence principle},
  author={T. A. Wagner and Stephan Schlamminger and Jens H Gundlach and Eric George Adelberger},
  journal={Classical and Quantum Gravity},
We briefly summarize motivations for testing the weak equivalence principle and then review recent torsion-balance results that compare the differential accelerations of beryllium–aluminum and beryllium–titanium test-body pairs with precisions at the part in 1013 level. We discuss some implications of these results for the gravitational properties of antimatter and dark matter and speculate about the prospects for further improvements in experimental sensitivity. 

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