Stronger Limits on Hypothetical Yukawa Interactions in the 30-8000 nm Range.
We report the results of new differential force measurements between a test mass and rotating source masses of gold and silicon to search for forces beyond Newtonian gravity at short separations. The technique employed subtracts the otherwise dominant Casimir force at the outset and, when combined with a lock-in amplification technique, leads to a significant improvement (up to a factor of 10^{3}) over existing limits on the strength (relative to gravity) of a putative force in the 40-8000 nm interaction range.
Department of Physics, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, USA.|Section 3, N16 Process Integration Department 1, Taiwan Semiconductor Manufacturing Company, HsinChu 30078, Taiwan.
Y-J
YJ
Chen
Department of Physics, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, USA.
W K
WK
Tham
Physics Department, Wabash College, Crawfordsville, Indiana 47933, USA.|Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA.
D E
DE
Krause
Center for Nanoscale Materials, Argonne National Laboratories, Argonne, Illinois 60439, USA.
D
D
López
Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA.
E
E
Fischbach
Department of Physics, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, USA.
R S
RS
Decca