135 citations · 242 across the 13 of their papers we have counts for
8 papers · 1 filter
Hadronic Light-by-Light Scattering in the Muonium Hyperfine Splitting
S. G. Karshenboim, V. A. Shelyuto, A. I. Vainshtein
We consider an impact of hadronic light-by-light scattering on the muonium hyperfine structure. A shift of the hyperfine interval is calculated with…
Positronium-ion decay
Mariusz Puchalski, Andrzej Czarnecki, Savely G. Karshenboim
We present a precise theoretical prediction for the decay width of the bound state of two electrons and a positron (a negative positronium ion), Gamma(Ps^-) = 2.087 085(12)/ns. We…
Precision Study of Positronium: Testing Bound State QED Theory
Savely G. Karshenboim
As an unstable light pure leptonic system, positronium is a very specific probe atom to test bound state QED. In contrast to ordinary QED for free leptons, the bound state QED theo…
The g Factor of a Bound Electron in a Hydrogen-Like Atom
Savely G. Karshenboim
Recently, a precise measurement on the bound electron g factor in hydrogen-like carbon was performed [1]. We consider the present status of the theory of the g factor of an electro…
The hydrogen Lamb shift and the proton radius
Savely G. Karshenboim
The Lamb shift measurement and theory are now both a dynamically developing field and we give a review of the current data. Critical comparison of theory and experiment can be done…
Decays of Positronium
Andrzej Czarnecki, Savely G. Karshenboim
We briefly review the theoretical and experimental results concerning decays of positronium. Possible solutions of the "orthopositronium lifetime puzzle" are discussed. Positronium…