The proton size puzzle: experiment vs theory.
Current status of the proton size puzzle from experimental and theoretical points of view is briefly discussed. The interest to these studies is primarily related to experiments conducted by the CREMA collaboration (Charge Radius Experi- ments with Muonic Atoms) with muonic hydrogen and deuterium by...
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2018-01-01
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Online Access: | https://doi.org/10.1051/epjconf/201819104001 |
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doaj-5ef0d8c8d03342099841feea2a0ff6cf2021-08-02T06:07:08ZengEDP SciencesEPJ Web of Conferences2100-014X2018-01-011910400110.1051/epjconf/201819104001epjconf_quarks2018_04001The proton size puzzle: experiment vs theory.Dorokhov A. E.Martynenko A. P.Martynenko F. A.Radzhabov A. E.Current status of the proton size puzzle from experimental and theoretical points of view is briefly discussed. The interest to these studies is primarily related to experiments conducted by the CREMA collaboration (Charge Radius Experi- ments with Muonic Atoms) with muonic hydrogen and deuterium by methods of laser spectroscopy. As a result a more accurate value of the proton charge radius was found to be rp = 0:84184(67) fm, which is different from the value recommended by CODATA for 7σ. In the second part we discuss recent calculations of 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, with the coupling of mesons to the muon being via two-photon intermediate state. 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.https://doi.org/10.1051/epjconf/201819104001 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Dorokhov A. E. Martynenko A. P. Martynenko F. A. Radzhabov A. E. |
spellingShingle |
Dorokhov A. E. Martynenko A. P. Martynenko F. A. Radzhabov A. E. The proton size puzzle: experiment vs theory. EPJ Web of Conferences |
author_facet |
Dorokhov A. E. Martynenko A. P. Martynenko F. A. Radzhabov A. E. |
author_sort |
Dorokhov A. E. |
title |
The proton size puzzle: experiment vs theory. |
title_short |
The proton size puzzle: experiment vs theory. |
title_full |
The proton size puzzle: experiment vs theory. |
title_fullStr |
The proton size puzzle: experiment vs theory. |
title_full_unstemmed |
The proton size puzzle: experiment vs theory. |
title_sort |
proton size puzzle: experiment vs theory. |
publisher |
EDP Sciences |
series |
EPJ Web of Conferences |
issn |
2100-014X |
publishDate |
2018-01-01 |
description |
Current status of the proton size puzzle from experimental and theoretical points of view is briefly discussed. The interest to these studies is primarily related to experiments conducted by the CREMA collaboration (Charge Radius Experi- ments with Muonic Atoms) with muonic hydrogen and deuterium by methods of laser spectroscopy. As a result a more accurate value of the proton charge radius was found to be rp = 0:84184(67) fm, which is different from the value recommended by CODATA for 7σ. In the second part we discuss recent calculations of 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, with the coupling of mesons to the muon being via two-photon intermediate state. 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. |
url |
https://doi.org/10.1051/epjconf/201819104001 |
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