Phys. Rev. C 72, 057601 (2005) [2 pages]Proton radii and two-photon exchangeReceived 19 August 2005; published 28 November 2005 We investigate the effect of two-photon exchange processes upon the rms- and Zemach radii extracted from electron-proton scattering. We find that the changes are small and do not help to explain the discrepancy between experimental and calculated HFS in the hydrogen atom. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.72.057601
DOI:
10.1103/PhysRevC.72.057601
PACS:
25.30.Bf, 21.10.Ft, 14.20.Dh
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