Muonic Hydrogen and the Third Zemach Moment
arXiv:nucl-th/0508025 · doi:10.1103/PhysRevA.72.040502
Abstract
We determine the third Zemach moment of hydrogen (<r^3>_(2)) using only the world data on elastic electron-proton scattering. This moment dominates the O (Z alpha)^5 hadronic correction to the Lamb shift in muonic atoms. The resulting moment, <r^3 >_(2) = 2.71(13) fm^3, is somewhat larger than previously inferred values based on models. The contribution of that moment to the muonic hydrogen 2S level is -0.0247(12) meV.
3 pages, no figures, revtex - submitted to Physical Review A