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Hyperfine Structure of the Ground and First Excited States in Light Hydrogen-Like Atoms and High-Precision Tests of QED
Savely G. Karshenboim, Vladimir G. Ivanov
We consider hyperfine splitting of 1s and, in part, of 2s levels in light hydrogen-like atoms: hydrogen, deuterium, tritium, helium-3 ion, muonium and positronium. We discuss prese…
Hyperfine structure in hydrogen and helium ion
Savely G. Karshenboim, Vladimir G. Ivanov
QED theory of the hyperfine splitting of the and state in hydrogen isotopes and helium-3 ion is considered. We develop an accurate theory of a specific difference 8E_{HFS…
Hadronic Vacuum Polarization Contribution to the Muonium Hyperfine Splitting
Savely G. Karshenboim, Valery A. Shelyuto
We discuss hadronic effects in the muonium hyperfine structure and derive an expression for the hadronic contribution to the hfs interval in form of the one-dimensional integral of…
Muonium hyperfine structure and hadronic effects
Andrzej Czarnecki, Simon I. Eidelman, Savely G. Karshenboim
A new result for the hadronic vacuum polarization correction to the muonium hyperfine splitting (HFS) is presented: Delta nu(had - vp) = (0.233 +- 0.003) kHz. Compared with previou…
2s Hyperfine Structure in Hydrogen Atom and Helium-3 Ion
Savely G. Karshenboim
The usefulness of study of hyperfine splitting in the hydrogen atom is limited on a level of 10 ppm by our knowledge of the proton structure. One way to go beyond 10 ppm is to stud…