Non-spherical proton shape and hydrogen hyperfine splitting

Abstract

We show that the non-spherical charge distribution of the proton manifests itself in hydrogen hyperfine splitting as an increase (in absolute value) of the proton Zemach radius and polarization contributions.

Comments: 10 pages, 4 figures, Paper presented at the International Conference on Precision Physics of Simple Atomic Systems, University of Windsor, Windsor, Canada, 21-26 July 2008