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Large gauge transformations and little group for soft photons

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Title
Large gauge transformations and little group for soft photons
Author(s)
Yuta Hamada; Min-Seok Seo; Gary Shiu
Publication Date
2017-11
Journal
PHYSICAL REVIEW D, v.96, no.10, pp.105013 -
Publisher
American Physical Society
Abstract
Recently, large gauge transformation(LGT), the residual gaugesymmetry after gauge fixing that survives at null infinity, has drawn much attention concerning soft theorems and the memory effect. We point out that LGT charges in quantum electrodynamics are in fact one of noncompact generators of the two dimensional Euclidean group. Moreover, by comparing two equivalent descriptions of gauge transformation, we suggest that LGT is simply another way of describing the gauged little group for massless soft photons. © 2017 American Physical Society
URI
http://pr.ibs.re.kr/handle/8788114/4067
DOI
10.1103/PhysRevD.96.105013
ISSN
2470-0010
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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