In the framework of the quasipotential method in quantum electrodynamics we calculate the contribution of pseudoscalar mesons to the interaction operator of a muon and a proton in muonic hydrogen atom. The parametrization of the transition form factor of two photons into π, η mesons, based on the experimental data on the transition form factors and QCD asymptotics is used. Numerical estimates of the contributions to the hyperfine structure of the spectrum of the S and P levels are presented.
@article{arxiv.1704.07702,
title = {The contribution of pseudoscalar mesons to hyperfine structure of muonic hydrogen},
author = {A. E. Dorokhov and N. I. Kochelev and A. P. Martynenko and F. A. Martynenko and R. N. Faustov},
journal= {arXiv preprint arXiv:1704.07702},
year = {2017}
}