Inelastic black hole scattering from charged scalar amplitudes
Abstract
We explain how the lowestorder classical gravitational radiation produced during the inelastic scattering of two Schwarzschild black holes in General Relativity can be obtained from a tree scattering amplitude in gauge theory coupled to scalar fields. The gauge calculation is related to gravity through the double copy. We remove unwanted scalar forces which can occur in the double copy by introducing a massless scalar in the gauge theory, which is treated as a ghost in the link to gravity. We hope these methods are a step towards a direct application of the double copy at higher orders in classical perturbation theory, with the potential to greatly streamline gravity calculations for phenomenological applications.
 Publication:

Journal of High Energy Physics
 Pub Date:
 March 2018
 DOI:
 10.1007/JHEP03(2018)044
 arXiv:
 arXiv:1711.03901
 Bibcode:
 2018JHEP...03..044L
 Keywords:

 Scattering Amplitudes;
 Black Holes;
 Classical Theories of Gravity;
 High Energy Physics  Theory;
 General Relativity and Quantum Cosmology;
 High Energy Physics  Phenomenology
 EPrint:
 28 pages, 6 figures