Finite actions and asymptotic charges at null infinity for any spin
arXiv:2507.19310 · doi:10.1016/j.physletb.2025.139908
Abstract
We identify boundary terms renormalizing the free on-shell actions for massless fields of arbitrary spin, including electromagnetism and linearized gravity, with boundary conditions allowing for supertranslation-like asymptotic symmetries. Our focus is on null infinity, in any spacetime dimensions. We also comment on the renormalization of the corresponding asymptotic charges.
10 pages. Comments and references added
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