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Progress on testing Lorentz symmetry with MICROSCOPE
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abstract
The Weak Equivalence Principle (WEP) and the local Lorentz invariance (LLI) are two major assumptions of General Relativity (GR). The MICROSCOPE mission, currently operating, will perform a test of the WEP with a precision of $10^{-15}$. The data will also be analysed at SYRTE for the purposes of a LLI test realised in collaboration with J. Tasson (Carleton College, Minnesota) and Q. Bailey (Embry-Riddle Aeronautical University, Arizona). This study will be performed in a general framework, called the Standard Model Extension (SME), describing Lorentz violations that could appear at Planck scale ($10^{19}$ GeV). The SME allows us to derive a Lorentz violating observable designed for the MICROSCOPE experiment and to search for possible deviations from LLI in the differential acceleration of the test masses.
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Cited by 1 Pith paper
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Exploring the Foundations of the Universe with Space Tests of the Equivalence Principle
The paper proposes that a space-based test of the universality of free fall at the 10^-17 level is both scientifically valuable and technically within reach using cold atoms or upgraded accelerometers.
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