B. R. Heckel

D. J. Kapner; Ted Cook; E. G. Adelberger; Jens H. Gundlach; B. R. Heckel; C. D. Hoyle; H. E. Swanson

We conducted three torsion-balance experiments to test the gravitational inverse-square law at separations between 9.53 mm and 55 microm, probing distances less than the dark-energy length scale lambda(d)=[4 -root](variant Plancks over 2pic/rho(d) approximately 85 microm. We find with 95% confidence that the inverse-square law holds (|alpha|<or=1) down to a length scale lambda=56 microm and that an extra dimension must have a size R<or=44 microm.

C. D. Hoyle; U. Schmidt; B. R. Heckel; E. G. Adelberger; Jens H. Gundlach; D. J. Kapner; H. E. Swanson

Motivated by higher-dimensional theories that predict new effects, we tested the gravitational 1/r(2) law at separations ranging down to 218 microm using a 10-fold symmetric torsion pendulum and a rotating 10-fold symmetric attractor. We improved previous short-range constraints by up to a factor of 1000 and find no deviations from Newtonian physics.

C. D. Hoyle; U. Schmidt; E. G. Adelberger; Jens H. Gundlach; B. R. Heckel; D.J. Kapner; H. E. Swanson

Motivated by a variety of theories that predict new effects, we tested the gravitational

W. C. Griffith; M. D. Swallows; T. H. Loftus; M. V. Romalis; B. R. Heckel; E. N. Fortson

{1/r}^{2}

B. R. Heckel; Claire Cramer; Ted Cook; E. G. Adelberger; Stephan Schlamminger; U. Schmidt

law at separations between 10.77 mm and

C. A. Baker; Y. Chibane; M. Chouder; P. Geltenbort; K. Green; P. Harris; B. R. Heckel; P. Iaydjiev; S.N. Ivanov; I. Kilvington; S. K. Lamoreaux; D. J. R. May; J.M. Pendlebury; J. D. Richardson; D. Shiers; K.F. Smith; M. G. D. van der Grinten

137\ensuremath{\mu}\mathrm{m}

B. R. Heckel; E. G. Adelberger; Jens H. Gundlach; Michael G. Harris; H. Erik Swanson

using two different 10-fold azimuthally symmetric torsion pendulums and rotating 10-fold symmetric attractors. Our work improves upon other experiments by up to a factor of about 100. We found no deviation from Newtonian physics at the 95% confidence level and interpret these results as constraints on extensions of the standard model that predict Yukawa or power-law forces. We set a constraint on the largest single extra dimension (assuming toroidal compactification and that one extra dimension is significantly larger than all the others) of

W. A. Terrano; E. G. Adelberger; J. G. Lee; B. R. Heckel

{R}_{*}l~160\ensuremath{\mu}\mathrm{m},

C.D. Bass; T.D. Bass; B. R. Heckel; C.R. Huffer; D. Luo; D. M. Markoff; A. M. Micherdzinska; W.M. Snow; H. E. Swanson; S.C. Walbridge

and on two equal-sized large extra dimensions of

S.D. Penn; E. G. Adelberger; B. R. Heckel; D.M. Markoff; H. E. Swanson

{R}_{*}l~130\ensuremath{\mu}\mathrm{m}.