Improved constraints on non-Newtonian forces at 10 microns
- Department of Physics, Stanford University, Stanford, California 94305 (United States)
Several recent theories suggest that light moduli or particles in 'large' extra dimensions could mediate macroscopic forces exceeding gravitational strength at length scales below a millimeter. Such new forces can be parameterized as a Yukawa-type correction to the Newtonian potential of strength {alpha} relative to gravity and range {lambda}. To extend the search for such new physics we have improved our apparatus utilizing cryogenic micro-cantilevers capable of measuring attonewton forces, which now includes a switchable magnetic force for calibration. Our most recent experimental constraints on Yukawa-type deviations from Newtonian gravity are more than 3 times as stringent as our previously published results and represent the best bound in the range of 5-15 {mu}m, with a 95% confidence exclusion of forces with |{alpha}|>14,000 at {lambda}=10 {mu}m.
- OSTI ID:
- 21250302
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 78, Issue 2; Other Information: DOI: 10.1103/PhysRevD.78.022002; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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