TH Cosmo Coffee

Effective field theory approach to gravity

by Dr Rafael Porto (UC Santa Barbara)

Europe/Zurich
1/1-025 (CERN)

1/1-025

CERN

20
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Description
The problem of motion in General Relativity has lost its academic status and become an active research area since the next generation of gravity wave detectors will rely upon its solution. The difficulties in finding the full solution stem from the many different scales involved in the problem: the internal structure (finite size effects), the orbit scale and the long wavelength of gravitational radiation. In addition, divergences arise due to the point particle approximation. We will show how ideas borrowed from effective field theory in particle physics (such as NRQCD and HQET), can be used to solve the problem of motion in a systematic fashion, one scale at the time, from a Wilsonian point of view. Moreover, divergences are naturally handled by dimensional regularization. Applications include Post-Newtonian corrections to the motion, gravitational energy flux, absorption, and finite size effects for compact (BHs or neutron stars) spinning binary systems.
Organised by

Geraldine Servant