Physics
Scientific paper
Feb 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phrvl..62..609s&link_type=abstract
Physical Review Letters (ISSN 0031-9007), vol. 62, Feb. 6, 1989, p. 609-612. Research supported by DOE.
Physics
34
Acceleration (Physics), Composition (Property), Field Theory (Physics), Force, Lead (Metal), Magnetic Moments, Mass Balance, Mechanical Measurement, Pendulums
Scientific paper
Previous 'fifth-force' experiments searched for differential acceleration of test bodies placed near terrestrial sources. Because these sources have N about equal to Z, the results had little sensitivity to forces coupled to B-2L = N-Z. A search for such forces was made by placing a 1-ton Pb source close to a Be/Al torsion balance. Null results rule out (at 2 sigma) the possibility that all previous composition-dependence results could be due to a force coupling predominantly to B-2L with a range lambda less than 1000 m. Also set are improved constraints on new interactions with lambda = 0.3-10 m.
Adelberger Eric G.
Heckel B. R.
Rogers W. F.
Stubbs Christopher W.
Swanson Erik H.
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