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Violation of the equivalence principle from light scalar dark matter

Wolf, Peter; Hees, Aurélien; Minazzoli, Olivier +2 more

In this paper, we study the local observational consequences of a violation of the Einstein equivalence principle induced by models of light scalar dark matter (DM). We focus on two different models where the scalar field couples linearly or quadratically to the standard model of matter fields. For both these cases, we derive the solutions of the …

MICROSCOPE limits for new long-range forces and implications for unified theories

Fayet, Pierre

Many theories beyond the standard model involve an extra U (1 ) gauge group. The resulting gauge boson U , in general mixed with the Z and the photon, may be massless or very light and very weakly coupled. It may be viewed as a generalized dark photon interacting with matter through a linear combination [ɛ_QQ +ɛ_BB +ɛ_L

Testing the equivalence principle in space after the MICROSCOPE mission

Nobili, Anna M.; Anselmi, Alberto

Tests of the weak equivalence principle (WEP) can reveal a new, composition dependent, force of nature, or disprove many models of new physics. For the first time, such a test is being successfully carried out in space by the MICROSCOPE satellite. Early results show no violation of the WEP sourced by the Earth for Pt and Ti test masses with random…