Illuminating Light Bending

N. Emil (1) , J. Bjerrum-Bohr (1) , Barry R. Holstein (2) , John F Donoghue (2) , L. Planté (3) , Pierre Vanhove (3)

1 NBI - Niels Bohr Institute [Copenhagen]
2 Department of Physics [Amherst]
3 IPHT - Institut de Physique Théorique - UMR CNRS 3681

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.

Domaines: Physique [physics]

N. Emil, J. Bjerrum-Bohr, Barry R. Holstein, John F Donoghue, L. Planté, et al.. Illuminating Light Bending. Doctoral. School and Workshops on Elementary Particle Physics and Gravity. Vol 292, Corfou, Greece. 2016. ⟨cel-01533199⟩