Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tests of the Gravitational Inverse-Square Law below the Dark-Energy
  Length Scale   We conducted three torsion-balance experiments to test the gravitational
inverse-square law at separations between 9.53 mm and 55 micrometers, probing
distances less than the dark-energy length scale $\lambda_{\rm
d}=\sqrt[4]{\hbar c/\rho_{\rm d}}\approx 85 \mu$m. We find with 95% confidence
that the inverse-square law holds ($|\alpha| \leq 1$) down to a length scale
$\lambda = 56 \mu$m and that an extra dimension must have a size $R \leq 44
\mu$m.

25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
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The categories of this paper are: stat
2
The categories of this paper are: math
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The categories of this paper are: acc-phys
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The categories of this paper are: eess
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The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int