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Pierre Touboul , Gilles Métris , Manuel Rodrigues , Yves André , Quentin Baghi , Joel Bergé , Damien Boulanger , Stefanie Bremer , Patrice Carle , Ratana Chhun , Bruno Christophe , Valerio Cipolla , Thibault Damour , Pascale Danto , Hansjoerg Dittus , Pierre Fayet , Bernard Foulon , Claude Gageant , Pierre-Yves Guidotti , Daniel Hagedorn , Emilie Hardy , Phuong-Anh Huynh , Henri Inchauspe , Patrick Kayser , Stéphanie Lala , Claus Lämmerzahl , Vincent Lebat , Pierre Leseur , Françoise Liorzou , Meike List , Frank Löffle , Isabelle Panet , Benjamin Pouilloux , Pascal Prieur , Alexandre Rebray , Serge Reynaud , Benny Rievers , Alain Robert , Hanns Selig , Laura Serron , Timothy Sumner , Nicolas Tanguy , Pieter Visser

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 non-vanishing 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 \(\delta\rm{(Ti,Pt)}= [-1 \pm 9 (\mathrm{stat}) \pm 9 (\mathrm{syst})] \times 10^{-15}\) (1\(\sigma\) statistical uncertainty) for the titanium-platinum E\"otv\"os parameter characterizing the relative difference in their free-fall accelerations.

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Clifford M. Will (2014)

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A. M. POLYAKOV, T. Damour (1994)

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E G Adelberger, J Gundlach, S Schlamminger … (2012)

http://arxiv.org/licenses/nonexclusive-distrib/1.0/