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arXiv · 1506.02906

New Symmetries of QED

Daniel Kapec·Monica Pate·Andrew Strominger
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Abstract

The soft photon theorem in U(1) gauge theories with only massless charged particles has recently been shown to be the Ward identity of an infinite-dimensional asymptotic symmetry group. This symmetry group is comprised of gauge transformations which approach angle-dependent constants at null infinity. In this paper, we extend the analysis to all U(1) theories, including those with massive charged particles such as QED.

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Daniel Kapec, Monica Pate, Andrew Strominger. 2015-06-09. New Symmetries of QED. https://arxiv.org/abs/1506.02906

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