Large gauge effects and the structure of amplitudes
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Publication:6134776
DOI10.1007/JHEP06(2023)204arXiv2211.16438MaRDI QIDQ6134776
Author name not available (Why is that?)
Publication date: 25 July 2023
Published in: (Search for Journal in Brave)
Abstract: We show that large gauge transformations modify the structure of momentum conservation leading to non-vanishing three-point amplitudes in a simple toy model of a gravitational wave event. This phenomenon resolves an apparent tension between perturbative scattering amplitude computations and exact methods in field theory. The tension is resolved to all orders of perturbation theory once large gauge effects are included via a modified LSZ prescription; if they are omitted, perturbative methods only recover a subset of terms in the full non-perturbative expression. Although our results are derived in the context of specific examples, several aspects of our work have analogues in dynamical gravitational scattering processes.
Full work available at URL: https://arxiv.org/abs/2211.16438
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