Radiation reaction from soft theorems

By Paolo Di Vecchia, C. Heissenberg, R. Russo, G. Veneziano. Physics Letters B, 2021

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Radiation reaction (RR) terms at the third post-Minkowskian (3PM) order have recently been found to be instrumental in restoring smooth continuity between the non-relativistic, relativistic, and ultra-relativistic (including the massless) regimes. Here we propose a new and intriguing connection between RR and soft (bremsstrahlung) theorems which short-circuits the more involved conventional loop computations. Although first noticed in the context of the maximally supersymmetric theory, unitarity and analyticity arguments support the general validity of this 3PM-order connection that we apply, in particular, to Einstein's gravity and to its Jordan-Brans-Dicke extension. In the former case we find full agreement with a recent result by Damour obtained through a very different reasoning.

Subfields: Cardiology and Cardiovascular Medicine, Control and Systems Engineering, Management Science and Operations Research

View Paper: https://www.semanticscholar.org/paper/5bb8919ae3ce74b6aa5f9312f3152dd9aa060117