Illuminating Light Bending
Abstract
The interactions of gravitons with spin-1 matter are calculated in parallel with the well known photon case. It is shown that graviton scattering amplitudes can be factorized into a product of familiar electromagnetic forms, and cross sections for various reactions are straightforwardly evaluated using helicity methods. Universality relations are identified. Extrapolation to zero mass yields scattering amplitudes for photon-graviton and graviton-graviton scattering. The phenomenon of light bending near a massive object, which is generally treated using classical general relativity, is discussed from alternative points of view.
Cite
@article{arxiv.1704.01624,
title = {Illuminating Light Bending},
author = {N. E. J. Bjerrum-Bohr and Barry R. Holstein and John F. Donoghue and Ludovic Planté and Pierre Vanhove},
journal= {arXiv preprint arXiv:1704.01624},
year = {2017}
}
Comments
latex. 35 pages. 5 figures. Contribution written for the proceedings of the conference "Recent Developments in Strings and Gravity", Corfu 2016