Bounds to the coupling of bosons beyond the Standard Model to atoms through precise isotope shift measurements

ORAL  · Invited

Abstract

By combining high-resolution spectroscopy of the 3d 2D3/2 − 3d 2D5/2 interval with an accuracy of ∼20 Hz using direct frequency-comb Raman spectroscopy with isotope shift measurements of the 4s 2S1/2 ↔ 3d 2D5/2 transition (~2 kHz accuracy) in all stable even isotopes of ACa+ (A = 40, 42, 44, 46, and 48), we have been able to carry out a King plot analysis with unprecedented sensitivity to coupling between electrons and neutrons by bosons beyond the Standard Model. We estimate, furthermore, that by improved spectroscopic techniques available, King plots based on data from spectroscopy on either Ca+, Ba+ and Yb+ ions should be able to produce sensitivity to such potentially new bosons, which surpass all other current methods in a broad mass range of 10 to 108  eV/c2.

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Publication: Cyrille Solaro, Steffen Meyer, Karin Fisher, Julian C. Berengut, Elina Fuchs and Michael Drewsen, PHYSICAL REVIEW LETTERS 125, 123003 (2020)

Presenters

  • Michael Drewsen

    • Aarhus University

Authors

  • Michael Drewsen

    • Aarhus University

  • Elina Fuchs

    • Theory Department, Fermilab, Batavia, Illinois 60510, USA

  • Julian Berengut

    • School of Physics, University of New South Wales, Sydney, New South Wales 2052, Australia

  • Cyrille Solaro

    • Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark

  • Steffen Meyer

    • Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark

  • Karin E Fisher

    • Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark