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Phys Rev Lett. 2016 Aug 12;117(7):071102. doi: 10.1103/PhysRevLett.117.071102. Epub 2016 Aug 10.

Combined Search for Lorentz Violation in Short-Range Gravity.

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MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
School of Physics, University of Western Australia, Crawley, Western Australia 6009, Australia.
Physics Department, Embry-Riddle Aeronautical University, Prescott, Arizona 86301, USA.
Physics Department, Indiana University, Bloomington, Indiana 47405, USA.


Short-range experiments testing the gravitational inverse-square law at the submillimeter scale offer uniquely sensitive probes of Lorentz invariance. A combined analysis of results from the short-range gravity experiments HUST-2015, HUST-2011, IU-2012, and IU-2002 permits the first independent measurements of the 14 nonrelativistic coefficients for Lorentz violation in the pure-gravity sector at the level of 10^{-9}  m^{2}, improving by an order of magnitude the sensitivity to numerous types of Lorentz violation involving quadratic curvature derivatives and curvature couplings.

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