| Issue |
EPJ Web Conf.
Volume 212, 2019
The 12th International Workshop on e+e- Collisions from Phi to Psi (PhiPsi 2019)
|
|
|---|---|---|
| Article Number | 07003 | |
| Number of page(s) | 6 | |
| Section | Baryon Formfactors | |
| DOI | https://doi.org/10.1051/epjconf/201921207003 | |
| Published online | 17 June 2019 | |
https://doi.org/10.1051/epjconf/201921207003
The sigma-meson exchange contribution to the muonic hydrogen Lamb shift
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
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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