most citedPositronium energy levels at order : light-by-light scattering in the two-photon-annihilation channel

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hep-ph2014★ 24 cited

Positronium energy levels at order : light-by-light scattering in the two-photon-annihilation channel

Gregory S. Adkins, Christian Parsons, M. D. Salinger +2

Recent and ongoing experimental work on the positronium spectrum motivates new efforts to calculate positronium energy levels at the level of three loop corrections. We have obtain…