Testing Lorentz symmetry with planetary orbital dynamics

Understand

Planetary ephemerides are a very powerful tool to constrain deviations from the theory of General Relativity using orbital dynamics.

• The effective field theory framework called the Standard-Model Extension (SME) has been developed in order to systematically parametrize hypothetical violations of Lorentz symmetry (in the Standard Model and in the gravitational sector).
• In this communication, we use the latest determinations of the supplementary advances of the perihelia and of the nodes obtained by planetary ephemerides analysis to constrain SME coefficients from the pure gravity sector and also from gravity-matter couplings.
• Our results do not show any deviation from GR and they improve current constraints.