改进10微米处对非牛顿力的约束
Improved constraints on non-Newtonian forces at 10 microns
摘要：
最近的几个理论表明，在“大”额外维度中的光模量或粒子可以在小于一毫米的长度尺度上介导超过引力强度的宏观力。这种新的力可以参数化为对牛顿势的强度$α$相对于重力和距离$λ$的Yukawa型修正。为了扩展对这种新物理的研究，我们改进了我们的设备，利用能够测量牛顿力的低温微杠杆，现在包括用于校准的可切换磁力。我们最近的实验约束Yukawa型偏离牛顿引力的严格程度是我们以前发表的结果的三倍以上，代表了5 - 15微米范围内的最佳界限，在$λ$ = 10微米时，$|α| > 14,000$的力的置信度为95%。
英文摘要：
Several recent theories suggest that light moduli or particles in "large" extra dimensions could mediate macroscopic forces exceeding gravitational strength at length scales below a millimeter. Such new forces can be parameterized as a Yukawa-type correction to the Newtonian potential of strength $α$ relative to gravity and range $λ$. To extend the search for such new physics we have improved our apparatus utilizing cryogenic micro-cantilevers capable of measuring attonewton forces, which now includes a switchable magnetic force for calibration. Our most recent experimental constraints on Yukawa-type deviations from Newtonian gravity are more than three times as stringent as our previously published results, and represent the best bound in the range of 5 - 15 microns, with a 95 percent confidence exclusion of forces with $|α| > 14,000$ at $λ$ = 10 microns.
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