<story><title>New test of the gravitational 1/r2 law at separations down to 52μm</title><url>https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.124.101101</url></story><parent_chain><item><author>ISL</author><text>A couple of us from the Eot-Wash group are active on HN. Happy to answer questions.&lt;p&gt;Hopefully the lead author (an HN-lurker, as far as I know) will jump in to bask in the limelight and answer your questions :).</text></item></parent_chain><comment><author>mirimir</author><text>This seems like the key result:&lt;p&gt;&amp;gt; We find that any gravitational-strength Yukawa interaction must have λ &amp;lt; 38.6 μm. This implies that the dilaton or heavy graviton mass and the radion unification mass must be greater than 5.1 meV and 7.1 TeV, respectively, and that the largest extra dimension must have a toroidal radius less than 30 μm. These are the tightest existing lab constraints on “string inspired” new gravitational phenomena.&lt;p&gt;But the key words in it mean ~nothing to me :(&lt;p&gt;So do they do anything more than constrain parameters?</text></comment>
<story><title>New test of the gravitational 1/r2 law at separations down to 52μm</title><url>https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.124.101101</url></story><parent_chain><item><author>ISL</author><text>A couple of us from the Eot-Wash group are active on HN. Happy to answer questions.&lt;p&gt;Hopefully the lead author (an HN-lurker, as far as I know) will jump in to bask in the limelight and answer your questions :).</text></item></parent_chain><comment><author>raverbashing</author><text>Cool!&lt;p&gt;Here&amp;#x27;s my question: Isn&amp;#x27;t the 1&amp;#x2F;r^2 just a consequence of Gauss&amp;#x27; theorem or are you trying to look at possible extra dimensional effects here?</text></comment>