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Two-body potential of Vainshtein screened theories

Oct. 03 - 14:30 - 2019

Speaker: Adrien Kuntz (Aix Marseille Univ, Université de Toulon, CNRS, CPT, Marseille, France)

Title: Two-body potential of Vainshtein screened theories

Abstract: Vainshtein screening is a popular mechanism allowing to hide the 
effects of a cosmological scalar field on solar system scales. However, 
up to now it was only investigated in spherically symmetric 
configurations. In this talk I will present analytical and numerical 
methods to obtain the energy in the fully nonlinear two-body case, which 
is relevant e.g for the Earth-Moon system or equal-mass case binary 
black hole/neutron star coalescence. This is achieved using techniques 
from the Effective-One-Body formalism of Buonanno and Damour. Finally, I 
will show how our results lead to a violation of the Weak Equivalence 
Principle testable by Lunar Laser Ranging.

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