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arxiv: 1506.02906 · v1 · submitted 2015-06-09 · ✦ hep-th · hep-ph

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New Symmetries of QED

Daniel Kapec , Monica Pate , Andrew Strominger
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classification ✦ hep-th hep-ph
keywords chargedgaugegroupparticlessymmetrytheoriesanalysisangle-dependent
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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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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Subleading Chern-Simons soft factors in perturbative de Sitter

    hep-th 2026-05 unverdicted novelty 5.0

    Subleading Chern-Simons soft factors stay insensitive to perturbative 1/ℓ² de Sitter corrections, indicating topological universality at the amplitude level.

  2. Comments on Symmetry Operators, Asymptotic Charges and Soft Theorems

    hep-th 2026-04 unverdicted novelty 5.0

    1-form symmetries in the QED soft sector generate asymptotic charges whose central extension implies soft photon theorems and fixes a two-soft-photon contact term.