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- W4308663973 abstract "In this note, we investigate the implications of classical soft theorems for the formalism developed by Kosower, Maybee and O'Connell (KMOC) to derive classical observables in gauge theory and gravity from scattering amplitudes. In particular, we show that the radiative electro-magnetic field at leading order in the soft expansion imposes an infinite hierarchy of constraints on the expectation value of the family of observables generated by textit{monomials} of linear impulse. We perform an explicit check on these constraints at next to leading order (NLO) in the coupling and as a corollary show how up to NLO, soft radiation obtained from quantum amplitudes is consistent with the (leading) classical soft photon theorem. We also argue that in 4 dimensions the classical log soft theorem derived by Saha, Sahoo and Sen generates an infinite hierarchy of constraints on the expectation value of operators which are products of one angular momentum and an arbitrary number of linear momenta." @default.
- W4308663973 created "2022-11-14" @default.
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- W4308663973 date "2021-11-22" @default.
- W4308663973 modified "2023-09-30" @default.
- W4308663973 title "Soft Constraints on KMOC Formalism" @default.
- W4308663973 doi "https://doi.org/10.48550/arxiv.2111.11642" @default.
- W4308663973 hasPublicationYear "2021" @default.
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