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Tests of the Gravitational Inverse-Square Law below the Dark-Energy Length Scale

D. J. Kapner, T. S. Cook, E. G. Adelberger, J. H. Gundlach, B. R. Heckel, C. D. Hoyle, and H. E. Swanson
Phys. Rev. Lett. 98, 021101 – Published 8 January 2007

Abstract

We conducted three torsion-balance experiments to test the gravitational inverse-square law at separations between 9.53 mm and 55μm, probing distances less than the dark-energy length scale λd=c/ρd485μm. We find with 95% confidence that the inverse-square law holds (|α|1) down to a length scale λ=56μm and that an extra dimension must have a size R44μm.

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  • Received 16 October 2006

DOI:https://doi.org/10.1103/PhysRevLett.98.021101

©2007 American Physical Society

Authors & Affiliations

D. J. Kapner*, T. S. Cook, E. G. Adelberger, J. H. Gundlach, B. R. Heckel, C. D. Hoyle, and H. E. Swanson

  • Center for Experimental Nuclear Physics and Astrophysics, Box 354290, University of Washington, Seattle, Washington 98195-4290, USA

  • *Present address: Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA.

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Issue

Vol. 98, Iss. 2 — 12 January 2007

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