Search Publications
New Test of Lorentz Invariance Using the MICROSCOPE Space Mission
Métris, Gilles; Rodrigues, Manuel; Touboul, Pierre +11 more
We use data from the T-SAGE instrument on board the MICROSCOPE space mission to search for Lorentz violation in matter-gravity couplings as described by the Lorentz violating standard model extension (SME) coefficients (a¯ eff)µw , where (µ =T , X , Y , Z ) and (w =e , p , n ) for the electron, proton, …
MICROSCOPE Mission: First Constraints on the Violation of the Weak Equivalence Principle by a Light Scalar Dilaton
Bergé, Joel; Pernot-Borràs, Martin; Uzan, Jean-Philippe +3 more
The existence of a light or massive scalar field with a coupling to matter weaker than gravitational strength is a possible source of violation of the weak equivalence principle. We use the first results on the Eötvös parameter by the MICROSCOPE experiment to set new constraints on such scalar fields. For a massive scalar field of mass smaller tha…
Testing the Universality of Free Fall towards Dark Matter with Radio Pulsars
Kramer, Michael; Shao, Lijing; Wex, Norbert
The violation of the weak equivalence principle (EP) in the gravitational field of Earth, described by the Eötvös parameter η⊕ , was recently constrained to the level |η⊕| ≲10-14 by the MICROSCOPE space mission. The Eötvös parameter ηDM, pertaining to the differential couplings of dark matter (DM) and or…
MICROSCOPE Mission: First Results of a Space Test of the Equivalence Principle
Chhun, Ratana; Métris, Gilles; Rodrigues, Manuel +40 more
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. …