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Lectures

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.
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N. Emil, J. Bjerrum-Bohr, Barry Holstein, John 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⟩

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