Null Test of Newtonian Inverse-Square Law at Submillimeter Range with a Dual-Modulation Torsion Pendulum

Liang-Cheng Tu, Sheng-Guo Guan, Jun Luo, Cheng-Gang Shao, and Lin-Xia Liu
Phys. Rev. Lett. 98, 201101 – Published 14 May 2007

Abstract

A null experimental test of the Newtonian inverse-square law at submillimeter range using a torsion pendulum was presented. Under the dual modulations of both the expected signal and the gravitational torque for calibration, our data concluded with 95% confidence that no new forces were observed and any gravitational-strength Yukawa forces (|α|1) must have a length scale λ<66μm, agreeing well with the latest result of the Eöt-wash group. Our result sets a unification energy scale of M*2.8TeV/c2 for the two compactified extra space dimensions with the same size R*<47μm.

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  • Received 7 January 2007

DOI:https://doi.org/10.1103/PhysRevLett.98.201101

©2007 American Physical Society

Authors & Affiliations

Liang-Cheng Tu, Sheng-Guo Guan, Jun Luo*, Cheng-Gang Shao, and Lin-Xia Liu

  • Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China

  • *Electronic address: junluo@mail.hust.edu.cn

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Vol. 98, Iss. 20 — 18 May 2007

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