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Phys. Rev. C 72, 057601 (2005) [2 pages]

Proton radii and two-photon exchange

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Peter G. Blunden
Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2

Ingo Sick
Department für Physik und Astronomie, Universität Basel, CH4056 Basel, Switzerland

Received 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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