Hadronic Vacuum Polarization and the Lamb Shift
J. L. Friar, J. Martorell, D. W. L. Sprung
Abstract
Recent improvements in the determination of the running of the fine-structure constant also allow an update of the hadronic vacuum-polarization contribution to the Lamb shift. We find a shift of -3.40(7) kHz to the 1S level of hydrogen. We also comment on the contribution of this effect to the determination by elastic electron scattering of the r.m.s. radii of nuclei.
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