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The worldline approach to helicity flip in plane waves
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We apply worldline methods to the study of vacuum polarisation effects in plane wave backgrounds, in both scalar and spinor QED. We calculate helicity-flip probabilities to one loop order and treated exactly in the background field, and provide a toolkit of methods for use in investigations of higher-order processes. We also discuss the connections between the worldline, S-matrix, and lightfront approaches to vacuum polarisation effects.
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Cited by 1 Pith paper
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Worldline representation of multiloop amplitudes in quantum electrodynamics
Worldline master integrals combine whole classes of QED Feynman diagrams and yield new coefficients for the two-loop scalar QED vacuum polarization.
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