Low’s Subleading Soft Theorem as a Symmetry of QED

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Low’s Subleading Soft Theorem as a Symmetry of QED

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Title: Low’s Subleading Soft Theorem as a Symmetry of QED
Author: Lysov, Vyacheslav; Pasterski, Sabrina; Strominger, Andrew E.

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Citation: Lysov, Vyacheslav, Sabrina Pasterski, and Andrew Strominger. 2014. “Low’s Subleading Soft Theorem as a Symmetry of QED.” Physical Review Letters 113 (11) (September). doi:10.1103/physrevlett.113.111601.
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Abstract: It was shown by F. Low in the 1950s that the subleading terms of soft photon S-matrix elements obey a universal linear relation. In this paper we give a new interpretation to this old relation, for the case of massless QED, as an infinitesimal symmetry of the S-matrix. The symmetry is shown to be locally generated by a vector field on the conformal sphere at null infinity. Explicit expressions are constructed for the associated charges as integrals over null infinity and shown to generate the symmetry. These charges are local generalizations of electric and magnetic dipole charges.
Published Version: doi:10.1103/physrevlett.113.111601
Other Sources: http://arxiv.org/abs/1407.3814
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:22543043
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