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arXiv · 1604.04908

Search for Screened Interactions Associated with Dark Energy Below the 100 $\mathrm{\mu m}$ Length Scale

Alexander D. Rider·David C. Moore·Charles P. Blakemore·Maxime Louis·Marie Lu·Giorgio Gratta
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Abstract

We present the results of a search for unknown interactions that couple to mass between an optically levitated microsphere and a gold-coated silicon cantilever. The scale and geometry of the apparatus enables a search for new forces that appear at distances below 100 $\mu$m and which would have evaded previous searches due to screening mechanisms. The data are consistent with electrostatic backgrounds and place upper limits on the strength of new interactions at $<0.1$ fN in the geometry tested. For the specific example of a chameleon interaction with an inverse power law potential, these results exclude matter couplings $\beta > 5.6 \times 10^4$ in the region of parameter space where the self-coupling $\Lambda \gtrsim 5$ meV and the microspheres are not fully screened.

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Alexander D. Rider, David C. Moore, Charles P. Blakemore, Maxime Louis, Marie Lu, Giorgio Gratta. 2016-04-17. Search for Screened Interactions Associated with Dark Energy Below the 100 $\mathrm{\mu m}$ Length Scale. https://doi.org/10.1103/physrevlett.117.101101

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