Asymptotic symmetries of Yang-Mills theory

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Asymptotic symmetries of Yang-Mills theory

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Title: Asymptotic symmetries of Yang-Mills theory
Author: Strominger, Andrew E.
Citation: Strominger, Andrew. 2014. “Asymptotic Symmetries of Yang-Mills Theory.” J. High Energ. Phys. 2014 (7) (July). doi:10.1007/jhep07(2014)151.
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Abstract: Asymptotic symmetries at future null infinity (I +) of Minkowski space for electrodynamics with massless charged fields, as well as non-Abelian gauge theories with gauge group G, are considered at the semiclassical level. The possibility of charge/color flux through I + suggests the symmetry group is infinite-dimensional. It is conjectured that the symmetries include a G Kac-Moody symmetry whose generators are ”large” gauge transformations which approach locally holomorphic functions on the conformal two-sphere at I + and are invariant under null translations. The Kac-Moody currents are constructed from the gauge field at the future boundary of I +. The current Ward identities include Weinberg’s soft photon theorem and its colored extension.
Published Version: doi:10.1007/JHEP07(2014)151
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