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

@article{Touboul2017MICROSCOPEMF,
  title={MICROSCOPE Mission: First Results of a Space Test of the Equivalence Principle.},
  author={Pierre Jean Touboul and Gilles M{\'e}tris and Manuel Rodrigues and Yves Andr{\'e} and Quentin Baghi and Joel Berg{\'e} and Damien Boulanger and Stefanie Bremer and Patrice Carle and Ratana Chhun and Bruno Christophe and V. Cipolla and T. Damour and Pascale Danto and Hansjoerg Dittus and Pierre Fayet and Bernard Foulon and Claude Gageant and Pierre-Yves Guidotti and Daniel Hagedorn and {\'E}milie Hardy and P. A. Huynh and Henri Inchausp{\'e} and Patrick Kayser and St{\'e}phanie Lala and Claus L{\"a}mmerzahl and Vincent Lebat and Pierre Leseur and Françoise Liorzou and Meike List and Frank L{\"o}ffler and Isabelle Panet and Benjamin Pouilloux and Pascal Prieur and Alexandre Rebray and Serge Reynaud and Benny Rievers and Alain Robert and Hanns Selig and Laura Serron and Timothy J Sumner and Nicolas Tanguy and Pieter N.A.M. Visser},
  journal={Physical review letters},
  year={2017},
  volume={119 23},
  pages={
          231101
        }
}
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… 

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