Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10724702 | Physics Letters B | 2013 | 5 Pages |
Abstract
The uncertainty in the contribution to the Lamb shift in muonic hydrogen, ÎEsubt arising from proton polarizability effects in the two-photon exchange diagram at large virtual photon momenta is shown large enough to account for the proton radius puzzle. This is because ÎEsubt is determined by an integrand that falls very slowly with very large virtual photon momenta. We evaluate the necessary integral using a set of chosen form factors and also a dimensional regularization procedure which makes explicit the need for a low energy constant. The consequences of our two-photon exchange interaction for low-energy elastic lepton-proton scattering are evaluated and could be observable in a planned low energy lepton-proton scattering experiment planned to run at PSI.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Gerald A. Miller,