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The hyperfine puzzle of strong-field bound-state QED

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Abstract

The hyperfine splitting in heavy highly charged ions provide the means to test QED in extremely strong magnetic fields. In order to provide a meaningful test, the splitting has to be measured in H-like and Li-like ions to remove uncertainties from nuclear structure. This has been achieved at the experimental storage ring ESR but a discrepancy to the theoretical prediction of more than 7σ was observed. We report on these measurements as well as on NMR measurements that were performed to solve this issue.

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Acknowledgements

We acknowledge financial support from the German Ministry for Education and Research under grants 05P15RDFAA, 05P12PMFAE, 05P15PMFAA 06GI947 and 05P12R6FAN, the Helmholtz-Association under contract HGF-IVF-HCJRG-108 and the Helmholtz International Centre for FAIR (HIC for FAIR) within the LOEWE program by the federal state Hesse. M.L., C.T. and J.U. acknowledge support from HGS-HiRe. Calculations were funded by the Foundation for the advancement of theoretical physics and mathematics “BASIS” grant according to the research project No. 18-1-3-55-1 and also by the President of Russian Federation Grant No. MK-2230.2018.2. This work was also supported by SPSU (Grants No. 11.38.237.2015) and by SPSU-DFG (Grants No. 11.65.41.2017 and No. STO 346/5-1).

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Authors and Affiliations

  1. Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany

    W. Nörtershäuser, J. Ullmann, C. Geppert, C. Gorges, M. Hammen, S. Kaufmann, K. König, M. Lochmann, B. Maaß & S. Schmidt

  2. Helmholtz Institut Jena, Jena, Germany

    J. Ullmann, T. Stöhlker & A. V. Volotka

  3. Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, Jena, Germany

    J. Ullmann & T. Stöhlker

  4. Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, Münster, Germany

    J. Ullmann, V. Hannen, J. Vollbrecht & C. Weinheimer

  5. Department of Physics, St. Petersburg State University, St. Petersburg, Russia

    L. V. Skripnikov, V. M. Shabaev & A. V. Volotka

  6. National Research Centre “Kurchatov Institute” B.P. Konstantinov Petersburg Nuclear Physics Institute, Gatchina, Russia

    L. V. Skripnikov

  7. GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany

    Z. Andelkovic, C. Brandau, W. Geithner, Y. A. Litvinov, R. Sánchez, M. Steck, T. Stöhlker & C. Trageser

  8. I. Physikalisches Institut, Justus-Liebig-Universität Gießen, Gießen, Germany

    C. Brandau & C. Trageser

  9. Paul Scherrer Institut, Villigen PSI, Villigen, Switzerland

    A. Dax

  10. Institut für Kernchemie, Universität Mainz, Mainz, Germany

    C. Geppert, C. Gorges, M. Hammen & S. Kaufmann

  11. Helmholtz Institut Mainz, Johannes Gutenberg-Universität Mainz, Mainz, Germany

    C. Geppert & M. Hammen

  12. Institut für Anorganische Chemie, Philipps-Universität Marburg, Marburg, Germany

    F. Kraus & B. Scheibe

  13. Institut für Festkörperphysik, Technische Universität Darmstadt, Darmstadt, Germany

    B. Kresse, A. F. Privalov & M. Vogel

  14. Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116, Braunschweig, Germany

    J. Meisner & M. Schmidt

  15. Institut für Angewandte Physik, Technische Universität Darmstadt, Darmstadt, Germany

    T. Murböck

  16. QOLS Group, Department of Physics, Imperial College London, London, UK

    R. C. Thompson

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  1. W. Nörtershäuser
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  2. J. Ullmann
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  4. Z. Andelkovic
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  24. M. Schmidt
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  25. S. Schmidt
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  26. V. M. Shabaev
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  29. R. C. Thompson
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  30. C. Trageser
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  31. M. Vogel
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  32. J. Vollbrecht
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  33. A. V. Volotka
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  34. C. Weinheimer
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Correspondence to W. Nörtershäuser.

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This article is part of the Topical Collection on Proceedings of the 7th International Conference on Trapped Charged Particles and Fundamental Physics (TCP 2018), Traverse City, Michigan, USA, 30 September-5 October 2018

Edited by Ryan Ringle, Stefan Schwarz, Alain Lapierre, Oscar Naviliat-Cuncic, Jaideep Singh and Georg Bollen

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Nörtershäuser, W., Ullmann, J., Skripnikov, L.V. et al. The hyperfine puzzle of strong-field bound-state QED. Hyperfine Interact 240, 51 (2019). https://doi.org/10.1007/s10751-019-1569-8

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