Theory Colloquium

# General Relativity and Beyond from Scattering Amplitudes

## by Pierre Vanhove (IPhT Saclay, Paris, France)

Wednesday, January 15, 2020 from to (Europe/Berlin)
at DESY Hamburg ( build. 2a, SR2 )
 Description The detections of the gravitational waves by the LIGO and VIRGO collaboration have opened a new window on the gravitational physics of our observable Universe. The multimessager detection allows to compare the physical properties of gravitational waves to the electromagnetic radiations and test the law of gravity in a new regime. Such comparison already put strong constraints on modifications of Einstein theory of gravity for dark energy models. In this talk, we will present the recent approach based on using modern techniques in scattering amplitude computations to extract the two-body interaction potential between massive and massless states. We will explain how these long-range contributions are independent of the ultraviolet completion and could lead to interesting new measurable physical gravitational phenomena.