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

S. J. Smullin*, A. A. Geraci, D. M. Weld, J. Chiaverini, S. Holmes, A. Kapitulnik

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

111 Scopus citations


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 25μm. 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=6-20μm.

Original languageEnglish (US)
Article number122001
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number12
StatePublished - Dec 15 2005

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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