标题： 短程等效原理测试 显示英文标题

标题： Short-range tests of the equivalence principle

摘要： 我们通过旋转一个3吨重的$^{238}$U吸引体，测试了短尺度下的等效原理，该吸引体围绕包含铜和铅测试物体的紧凑扭秤旋转。观察到的测试物体向吸引体的微分加速度为$a_{\text{Cu}}-a_{\text{Pb}} =(1.0\pm2.8)\times 10^{-13}$cm/s$^2$，应与相应的引力加速度$9.2\times10^{-5}$cm/s$^2$进行比较。我们的结果对具有杨-米尔斯范围的等效原理破坏相互作用设定了新的限制，范围小至1厘米，并显著提高了10公里到1000公里范围内的现有限制。我们的数据还对某些可能由两玻色子交换过程产生的幂律势场设定了严格的限制。 显示英文摘要

摘要： We tested the equivalence principle at short length scales by rotating a 3-ton $^{238}$U attractor around a compact torsion balance containing Cu and Pb test bodies. The observed differential acceleration of the test bodies toward the attractor, $a_{\text{Cu}}-a_{\text{Pb}} =(1.0\pm2.8)\times 10^{-13}$ cm/s$^2$, should be compared to the corresponding gravitational acceleration of $9.2\times10^{-5}$ cm/s$^2$. Our results set new constraints on equivalence-principle violating interactions with Yukawa ranges down to 1 cm, and improve by substantial factors existing limits for ranges between 10 km and 1000 km. Our data also set strong constraints on certain power law potentials that can arise from two-boson exchange processes.