The sigma-meson exchange contribution to the muonic hydrogen Lamb shift
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
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Published online: 17 June 2019
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 Γσγγ. It is shown that scalar meson exchange contribution to the Lamb shift in muonic hydrogen, △ELs(2P−2S ),is rather large and relevant for a comparison with coming precise experimental data.
© The Authors, published by EDP Sciences, 2019
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