2005/08/31 by Sylvia Smullin, S. J. Smullin, A. A. Geraci +8 · 4 citations
Physics and Astronomy · #Classical mechanics #Cosmology #Experimental and Theoretical Physics Studies #Fifth force #Lambda #Length scale #Mechanical and Optical Resonators #Newtonian fluid #Order (exchange) #Particle physics #Physics #Quantum Electrodynamics and Casimir Effect #Quantum mechanics #Type (biology) #Yukawa potential #cond-mat.other #gr-qc #hep-ph
paper · pdf · doi:10.1103/physrevd.72.122001
published as Phys.Rev.D72:122001,2005; Erratum-ibid.D72:129901,2005 · 21 pages, 16 figures; Reference added to Sec. I and summary paragraph added to Sec. IX. Typographical errors corrected
openalex publication_date 2005/12/08 · arxiv created 2006/01/01 · arxiv updated 2014/11/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 \ensuremathμm. 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 \ensuremathα and length scale \ensuremathλ of Yukawa-type deviations from Newtonian gravity; our results presented here yield the best experimental limit in the range of \ensuremathλ=6--20 \ensuremathμm.