The inverse square law (ISL) of gravity has been meaningfully tested over length scales spanning 20 orders
of magnitude, eliminating Yukawa-like couplings competitive with the strength of gravity from 10–4 to
1016 meter length scales. The deepest probe of the ISL is from LLR at a scale of 108 meters, where
any new force must be weaker than gravity by more than ten orders-of-magnitude [38
]. Short-range tests of
the ISL have recently been prompted by the energy scale of the cosmological acceleration, which suggest
new-physics below 1 mm [1
].
Modern tests of Newton’s inverse-square law of gravity often search for an additional Yukawa contribution to the gravitational potential:
where Recent analysis of LLR data includes specifically fitting for Yukawa perturbation terms in the equations
of motion leading to a measurement of at
. While intriguing, this
possible non-null result has yet to be thoroughly investigated [38
].
http://www.livingreviews.org/lrr-2010-7 |
Living Rev. Relativity 13, (2010), 7
![]() This work is licensed under a Creative Commons License. E-mail us: |