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Friday, March 31, 2000
Physics Building, Room 204
Note special time.
[Host: Rogers Ritter]
"The Search for Non-Newtonian Gravity"
Ongoing attempts to unify the known fundamental forces lead to the
suggestion that there may exist new gravity-like forces in nature. These
would arise from the exchange of new light bosonic quanta among the
constituents of ordinary matter, and would produce apparent deviations from
the predictions of Newtonian gravity. The suggestion of such a "fifth force"
in 1986 has led to a broadened view of the interaction of gravity and other
known and hypothetical forces, and has helped to stimulate a large number of
new experiments to search for weak long-range forces. This talk will review
both the theoretical motivation for such new forces, and the experimental
results that have been obtained to date.
More recently newer string-inspired theories have suggested the presence of
additional macroscopic forces acting over sub-millimeter distances. Detecting
such forces presents special challenges-both theoretical and experimental-
for reasons that I will discuss.
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