31 citations · 57 across the 7 of their papers we have counts for
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Three-photon-annihilation contributions to positronium energies at order
Gregory S. Adkins, Minji Kim, Christian Parsons +1
Positronium spectroscopy (n=1 hyperfine splitting, n=2 fine structure, and the 1S-2S interval) has reached a precision of order 1 MHz. Vigorous ongoing efforts to improve the exper…
Positronium energy levels at order : vacuum polarization corrections in the two-photon-annihilation channel
Gregory S. Adkins, Christian Parsons, M. D. Salinger +1
We have calculated all contributions to the energy levels of parapositronium at order coming from vacuum polarization corrections to processes involving virtual annihilatio…
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…