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Dorokhov, A.E.; Kochelev, N.I.; Martynenko, A.P.; Martynenko, F.A.; Radzhabov, A.E.
Physics letters. B, 01/2018, Letnik: 776, Številka: CJournal Article
The contribution from the axial-vector meson exchange to the potential of the muon–proton interaction in muonic hydrogen induced by anomalous axial-vector meson coupling to two photon state is calculated. It is shown that such contribution to the hyperfine splitting in muonic hydrogen is large and important for a comparison with precise experimental data. In the light of our result, the proton radius “puzzle” is discussed.
