Constraints on Yukawa-Type Deviations from Newtonian Gravity at 20 Microns

Details Constraints on Yukawa-Type Deviations from Newtonian Gravity at 20 Microns Constraints on Yukawa-Type Deviations from Newtonian Gravity at 20 Microns

2005-08-19

arxiv.org/abs/hep-ph/0508204v2

Phys.Rev.D72:122001,2005; Erratum-ibid.D72:129901,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, 16 figures; Reference added to Sec. I and summary paragraph added to Sec. IX. Typographical errors corrected

Scientific paper

10.1103/PhysRevD.72.122001

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 microns. 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 alpha and length scale lambda of Yukawa-type deviations from Newtonian gravity; our results presented here yield the best experimental limit in the range of lambda=6--20 microns.

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