Short-range tests of the equivalence principle

Details Short-range tests of the equivalence principle Short-range tests of the equivalence principle

Jan 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000phrvd..61b2001s&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 61, Issue 2, 15 January 2000, id.022001

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70

Experimental Studies Of Gravity, Other Topics In General Relativity And Gravitation, Other Particles

Scientific paper

We tested the equivalence principle at short length scales by rotating a 3 ton 238U attractor around a compact torsion balance containing Cu and Pb test bodies. The observed differential acceleration of the test bodies toward the attractor, aCu-aPb=(1.0+/-2.8)×10-13 cm/s2, should be compared to the corresponding gravitational acceleration of 9.2×10-5 cm/s2. Our results set new constraints on equivalence-principle violating interactions with Yukawa ranges down to 1 cm, and improve by substantial factors existing limits for ranges between 10 km and 1000 km. Our data also set strong constraints on certain power-law potentials that can arise from two-boson exchange processes.

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