https://doi.org/10.1051/epjconf/201920405008
Hadronic contribution of light by light scattering in the energy spectrum of muonic hydrogen
1 Joint Institute for 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
** e-mail: a.p.martynenko@samsu.ru
*** e-mail: f.a.martynenko@gmail.com
**** e-mail: aradzh@icc.ru
Published online: 3 April 2019
The contribution from scalar meson (S) exchange to the potential of the muon-proton interaction in muonic hydrogen induced by the scalar meson coupling to the two photon state is calculated. An estimate of transition form factor S → γγ is given on the basis of the quark model and experimental data on the decay widths 
. It is shown that scalar meson exchange contribution to the Lamb shift in muonic hydrogen ∆ELs(2P – 2S) is large and important for a comparison with 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.
