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Obtaining fully polarised amplitudes in gauge invariant form (2201.10852v1)
Published 26 Jan 2022 in hep-th and hep-ph
Abstract: We describe progress applying the \textit{Worldline Formalism} of quantum field theory to the fermion propagator dressed by $N$-photons to study multi-linear Compton scattering processes, explaining how this approach -- whose calculational advantages are well-known at multi-loop order -- yields compact and manifestly gauge invariant scattering amplitudes.
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