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Large gauge transformations and little group for soft photons

Journal Article · · Physical Review D
 [1];  [2];  [3]
  1. Univ. of Wisconsin, Madison, WI (United States). Dept. of Physics; High Energy Accelerator Research Organization (KEK), Tsukuba (Japan). High Energy Accelerator Research Organization Theory Center. Inst. of particle and nuclear studies; DOE/OSTI
  2. Inst. for Basic Science, Daejeon (Korea, Republic of). Center for Theoretical Physics of the Universe; Chungnam National Univ., Daejeon (Korea, Republic of). Dept. of Physics
  3. Univ. of Wisconsin, Madison, WI (United States). Dept. of Physics
Recently, large gauge transformation (LGT), the residual gauge symmetry 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.
Research Organization:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
FG02-95ER40896
OSTI ID:
1541127
Alternate ID(s):
OSTI ID: 1409463
Journal Information:
Physical Review D, Journal Name: Physical Review D Journal Issue: 10 Vol. 96; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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