MICROSCOPE Mission: First Results of a Space Test of the Equivalence Principle

Abstract : According to the weak equivalence principle, all bodies should fall at the same rate in a gravitational field. The MICROSCOPE satellite, launched in April 2016, aims to test its validity at the 10-15 precision level, by measuring the force required to maintain two test masses (of titanium and platinum alloys) exactly in the same orbit. A nonvanishing result would correspond to a violation of the equivalence principle, or to the discovery of a new long-range force. Analysis of the first data gives δ(Ti,Pt)=[-1±9(stat)±9(syst)]×10-15 (1σ statistical uncertainty) for the titanium-platinum Eötvös parameter characterizing the relative difference in their free-fall accelerations.
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https://hal.archives-ouvertes.fr/hal-01669840
Contributeur : Inspire Hep <>
Soumis le : jeudi 21 décembre 2017 - 01:09:47
Dernière modification le : lundi 23 juillet 2018 - 02:56:45

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Pierre Touboul, Gilles Métris, Manuel Rodrigues, Yves André, Quentin Baghi, et al.. MICROSCOPE Mission: First Results of a Space Test of the Equivalence Principle. Phys.Rev.Lett., 2017, 119 (23), pp.231101. 〈10.1103/PhysRevLett.119.231101〉. 〈hal-01669840〉

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