New test of the equivalence principle from lunar laser ranging

Details New test of the equivalence principle from lunar laser ranging New test of the equivalence principle from lunar laser ranging

Mar 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976phrvl..36..551w&link_type=abstract

Physical Review Letters, vol. 36, Mar. 15, 1976, p. 551-554.

Physics

98

Earth-Moon System, Equivalence, Gravitational Fields, Laser Range Finders, Lunar Rangefinding, Relativistic Effects, Data Reduction, Energy Conservation, Gravitation Theory, Lunar Orbits, Momentum Theory, Relativity

Scientific paper

An analysis of six years of lunar-laser-ranging data gives a zero amplitude for the Nordtvedt term in the earth-moon distance yielding the Nordtvedt parameter eta = 0.00 plus or minus 0.03. Thus, earth's gravitational self-energy contributes equally, plus or minus 3%, to its inertial mass and passive gravitational mass. At the 70% confidence level this result is only consistent with the Brans-Dicke theory for omega greater than 29. We obtain the absolute value of beta - 1 less than about 0.02 to 0.05 for five-parameter parametrized post-Newtonian theories of gravitation with energy-momentum conservation.

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