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Phys. Rev. D 72, 122001 (2005) [20 pages]

Constraints on Yukawa-type deviations from Newtonian gravity at 20 microns

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S. J. Smullin1,*, A. A. Geraci1, D. M. Weld1, J. Chiaverini2,†, S. Holmes3, and A. Kapitulnik1,4,‡
1Department of Physics, Stanford University, Stanford, California 94305, USA
2National Institute of Standards and Technology, Boulder, Colorado 80305, USA
3Department of Statistics, Stanford University, Stanford, California 94305, USA
4Department of Applied Physics, Stanford University, Stanford, California 94305, USA

See Also: Publisher's Note

Received 18 August 2005; published 8 December 2005; corrected 12 December 2005

Recent theories of physics beyond the standard model have predicted deviations from Newtonian gravity at short distances. In order to test these theories, we have a built an apparatus that can measure attonewton-scale forces between gold masses separated by distances on the order of 25  μm. A micromachined silicon cantilever was used as the force sensor, and its displacement was measured with a fiber interferometer. We have used our measurements to set bounds on the magnitude α and length scale λ of Yukawa-type deviations from Newtonian gravity; our results presented here yield the best experimental limit in the range of λ=6–20  μm.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.72.122001
DOI:
10.1103/PhysRevD.72.122001
PACS:
04.80.Cc

*Present address: Physics Department, Princeton University, Princeton, NJ 08544, USA.

†Present address: Los Alamos National Laboratory, MS D454, Los Alamos, NM 87545, USA.

‡Electronic address: aharonk@stanford.edu

See Also

Publisher's Note: S. J. Smullin, A. A. Geraci, D. M. Weld, J. Chiaverini, S. Holmes, and A. Kapitulnik, Publisher’s Note: Constraints on Yukawa-type deviations from Newtonian gravity at 20 microns [Phys. Rev. D 72, 122001 (2005)], Phys. Rev. D 72, 129901 (2005).

 
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