Abstract
The optimized perturbation expansions, Grunberg's fastest apparent convergence and Stevenson's principle of minimal sensitivity, are applied to some low-energy QED quantities. The optimization does not disturb the experimentally established values, and, at higher orders, its effects are in the direction of reducing small differences between theoretical and experimental values.
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Kubo, J., Sakakibara, S. Optimized perturbation theory in quantum electrodynamics. Z. Phys. C - Particles and Fields 14, 345–349 (1982). https://doi.org/10.1007/BF01578655
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DOI: https://doi.org/10.1007/BF01578655