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Journal Article

On Non-Perturbative Unitarity in Gravitational Scattering

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Tran,  Tung
Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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1902.08409.pdf
(Preprint), 371KB

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Citation

Sachs, I., & Tran, T. (2019). On Non-Perturbative Unitarity in Gravitational Scattering. The European Physical Journal C, 79(11): 914. doi:10.1140/epjc/s10052-019-7403-2.


Cite as: https://hdl.handle.net/21.11116/0000-0003-23DB-F
Abstract
We argue that the tree-level graviton-scalar scattering in the Regge limit is
unitarized by non-perturbative effects within General Relativity. At Planckian
energy the back reaction of the incoming graviton on the background geometry
produces a non-perturbative plane wave which, in turn, softens the UV-behavior.
Our amplitude then interpolates between the perturbative graviton-scalar
scattering at low energy and scattering on a classical plane wave in the Regge
limit.