12-16 October 2015
Hungarian Academy of Sciences
Europe/Budapest timezone

Recoil correction to the proton finite-size contribution to the Lamb shift in muonic hydrogen

Oct 14, 2015, 12:30 PM
30m
Kis terem (Small conference room) (Hungarian Academy of Sciences)

Kis terem (Small conference room)

Hungarian Academy of Sciences

1051 Budapest, Széchenyi tér 9.

Speaker

Dr Evgeny Yu. Korzinin (D. I. Mendeleev Institute for Metrology, St. Petersburg 190005, Russia)

Description

The Lamb shift in muonic hydrogen was measured some time ago to a high accuracy. The theoretical prediction of this value is very sensitive to the proton finite-size effects. The proton radius extracted from muonic hydrogen is in contradiction with the results extracted from elastic electron-proton scattering. That creates a certain problem for the interpretation of the results from the muonic hydrogen Lamb shift. For the latter we need also to take into account the two-photon-exchange contribution with the proton finite size involved. The only way to describe it relies on the data from the scattering, which may produce an internal inconsistency of theory. Recently the leading proton-finite-size contribution to the two-photon exchange was found within the external field approximation. The recoil part of the two-photon-exchange has not been considered. We revisit calculation of the external-field part and take the recoil correction to the finite-size effects into account.

Primary author

Dr Evgeny Yu. Korzinin (D. I. Mendeleev Institute for Metrology, St. Petersburg 190005, Russia)

Co-authors

Prof. Savely G. Karshenboim (Max-Planck-Institut für Quantenoptik, Garching 85748, Germany and Pulkovo Observatory, St. Petersburg 196140, Russia) Dr Valery A. Shelyuto (D. I. Mendeleev Institute for Metrology, St. Petersburg 190005, Russia) Dr Vladimir G. Ivanov (Pulkovo Observatory, St. Petersburg 196140, Russia)

Presentation materials