Precision tests of new scalar interactions with bound-electron g-factors in highly charged ions
Precision measurements in atomic physics provide a powerful probe of the Standard Model and possible signals of new physics. In particular, bound-electron $g$-factor measurements in highly charged ions have reached an extraordinary level of precision, making them sensitive to effects beyond quantum...
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| Auteur principal: | |
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| Format: | Book/Monograph Thèse |
| Langue: | anglais |
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Heidelberg
28 Jul. 2026
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| DOI: | 10.11588/heidok.00039125 |
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| Accès en ligne: | Resolving-System, kostenfrei: https://nbn-resolving.org/urn:nbn:de:bsz:16-heidok-391251 Resolving-System, kostenfrei: https://doi.org/10.11588/heidok.00039125 Verlag, kostenfrei, Volltext: http://www.ub.uni-heidelberg.de/archiv/39125 Langzeitarchivierung Nationalbibliothek, kostenfrei: https://d-nb.info/141475700X/34 
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| Notes sur l'auteur: | put forward by Matteo Moretti ; referees: PD Dr. Zoltán Harman [und ein weiterer Gutachter] |
| Résumé: | Precision measurements in atomic physics provide a powerful probe of the Standard Model and possible signals of new physics. In particular, bound-electron $g$-factor measurements in highly charged ions have reached an extraordinary level of precision, making them sensitive to effects beyond quantum electrodynamics and nuclear structure. This thesis explores the potential of such measurements to constrain new scalar interactions between electrons, protons, and neutrons. The theoretical framework is developed within bound-state quantum electrodynamics, employing and extending the two-time Green’s function formalism to describe bound electrons in strong Coulomb fields. Within this approach, scalar-boson corrections to the bound-electron $g$-factor are derived for hydrogen-like and lithium-like ions. For hydrogen-like ions, a generalized nuclide-shift method is introduced to isolate the electron-proton contribution while canceling or suppressing the electron-neutron and electron-electron parts. Using available data for different ions, this method yields constraints on the electron-proton coupling that improve previous atomic bounds by up to three orders of magnitude. For lithium-like ions, correlations among scalar couplings are studied through a global $\chi^2$ analysis combining bound-electron $g$-factor measurements, isotope-shift data, and the free-electron $g$-factor. Overall, the results demonstrate the potential of highly charged ions as complementary probes of physics beyond the Standard Model. |
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| Description matérielle: | Online Resource |
| DOI: | 10.11588/heidok.00039125 |