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Infrared features of gravitational scattering and radiation in the eikonal approach

2019
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Physical Review D
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Following a semi-classical eikonal approach --- justified at transplanckian energies order by order in the deflection angle $\Theta_s\sim\frac{4G\sqrt{s}}{b} \equiv \frac{2 R}{b}$ --- we investigate the infrared features of gravitational scattering and radiation in four space-time dimensions, and we illustrate the factorization and cancellation of the infinite Coulomb phase for scattering and the eikonal resummation for radiation. As a consequence, both the eikonal phase $2\delta(E,b)$ and the

doi:10.1103/physrevd.99.066008
fatcat:wyryq4mnfbavnco76twfpzxpym