Summary
We discuss a null experiment to search for the fifth force at ranges around 10 km. It is proposed to use a three-axis gravity gradiometer to measure the trace of the Earth gravity tensor from a freely falling elevator dropped by a balloon. The main error sources are considered to some extent.
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We thank the Italian Space Agency, ASI, for supporting this research. In particular we acknowledge the contributions of O. Cosentino, A. Leonardi, E. Morelli, G. Natali, G. Rum, D. Spoto, in the design of the falling facility.
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Ciufolini, I., Fuligni, F., Iafolla, V. et al. Testing deviations from the inverse square law with a freely falling gravity gradiometer at Balloon altitudes. Nouv Cim C 15, 973–982 (1992). https://doi.org/10.1007/BF02506689
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DOI: https://doi.org/10.1007/BF02506689