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arXiv · 1709.08405

Unitarity restoring graviton radiation in the collapse regime of scattering

Marcello Ciafaloni·Dimitri Colferai
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Abstract

We investigate graviton radiation in gravitational scattering at small impact parameters $b b$, so as to suggest a possible completion of the unitarity sum. In fact, such energy radiation at large distances turns out to compensate and to gradually reduce to nothing the amount of energy $E'$ being trapped at small-$b$'s, by thus avoiding the quantum tunneling suppression of the elastic scattering and suggesting a unitary evolution. We finally look at the coherent radiation sample so obtained and we find that, by energy conservation, it develops an exponential frequency damping corresponding to a "quasi-temperature" of order $\hbar/R$, which is naturally related to a Hawking radiation and is suggestive of a black-hole signal at quantum level.

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Marcello Ciafaloni, Dimitri Colferai. 2017-09-25. Unitarity restoring graviton radiation in the collapse regime of scattering. https://doi.org/10.1103/physrevd.96.126008

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