The contribution of pseudoscalar and axial-vector mesons to hyperfine structure of muonic hydrogenстатья
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Дата последнего поиска статьи во внешних источниках: 24 октября 2018 г.
Аннотация:In the framework of the quasipotential method in quantum electrodynamics we
calculate the contribution of light pseudoscalar (PS) and axial-vector (AV) mesons to the
interaction operator of a muon and a proton in muonic hydrogen atom. The coupling of mesons
with the muon is via two-photon intermediate state. The parametrization of the transition form
factor of two photons into PS and AV 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. It is shown that such
contribution to the hyperfine splitting in muonic hydrogen is rather important for a comparison
with precise experimental data.