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<i>MICROSCOPE</i> Mission: First Constraints on the Violation of the Weak Equivalence Principle by a Light Scalar Dilaton
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 E\"otv\"os parameter by the MICROSCOPE experiment to set new constraints on such scalar fields. …