The sigma-meson exchange contribution to the muonic hydrogen Lamb shift

A.E. Dorokhov; A.P. Martynenko; F.A. Martynenko; A.E. Radzhabov

doi:10.1051/epjconf/201921207003

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Proceedings

Open Access

EPJ Web of Conferences 212, 07003 (2019)
https://doi.org/10.1051/epjconf/201921207003

The sigma-meson exchange contribution to the muonic hydrogen Lamb shift

A.E. Dorokhov¹^,2^*, A.P. Martynenko², F.A. Martynenko² and A.E. Radzhabov²^,3

¹ Joint Institute of Nuclear Research, BLTP, 141980, Moscow region, Dubna, Russia
² Samara University, 443086, Samara, Russia
³ Matrosov Institute for System Dynamics and Control Theory SB RAS, 664033, Irkutsk, Russia

^* e-mail: dorokhov@theor.jinr.ru

Published online: 17 June 2019

Abstract

The sigma(ξ)meson exchange contribution to the potential of the muon-proton interactionin muonichydrogen inducedbythe ξ-meson coupling to two photons is estimated. The transition form factor ξ → γγ is deduced from the quark model and experimental data on the decay widths Γ_σγγ. It is shown that scalar meson exchange contribution to the Lamb shift in muonic hydrogen, △E^Ls(2P−2S ),is rather large and relevant for a comparison with coming precise experimental data.

© The Authors, published by EDP Sciences, 2019

This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.