Short-Range Test of the Equivalence Principle

Details Short-Range Test of the Equivalence Principle Short-Range Test of the Equivalence Principle

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997phrvl..78.2523g&link_type=abstract

Physical Review Letters, Volume 78, Issue 13, March 31, 1997, pp.2523-2526

Physics

34

Scientific paper

We rotated a 3 ton 238U attractor around a compact torsion balance and compared the accelerations of Cu and Pb toward U. We found that aCu-aPb = \(-0.7+/-5.7\)×10-13 cm/s2, compared to the 9.8×10-5 cm/s2 gravitational acceleration toward the attractor. Our results set new constraints on equivalence-principle violating interactions with Yukawa ranges down to 1 cm and rule out an earlier suggestion of a Yukawa interaction coupled predominantly to N-Z.

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