Publikationen (FIS)

Nonlinear Calcium King Plot Constrains New Bosons and Nuclear Properties

Verfasst von

Alexander Wilzewski, Lukas J. Spieß, Malte Wehrheim, Shuying Chen, Steven A. King, Peter Micke, Melina Filzinger, Martin R. Steinel, Nils Huntemann, Erik Benkler, Piet O. Schmidt, Luca I. Huber, Jeremy Flannery, Roland Matt, Martin Stadler, Robin Oswald, Fabian Schmid, Daniel Kienzler, Jonathan Home, Diana P.L.Aude Craik, Menno Door, Sergey Eliseev, Pavel Filianin, Jost Herkenhoff, Kathrin Kromer, Klaus Blaum, Vladimir A. Yerokhin, Igor A. Valuev, Natalia S. Oreshkina, Chunhai Lyu, Sreya Banerjee, Christoph H. Keitel, Zoltán Harman, Julian C. Berengut, Anna Viatkina, Jan Gilles, Andrey Surzhykov, Michael K. Rosner, José R. Crespo López-Urrutia, Jan Richter, Agnese Mariotti, Elina Fuchs

Abstract

Nonlinearities in King plots (KP) of isotope shifts (IS) can reveal the existence of beyond-standard-model (BSM) interactions that couple electrons and neutrons. However, it is crucial to distinguish higher-order standard model (SM) effects from BSM physics. We measure the IS of the transitions P30→P31 in Ca14+ and S21/2→D5/22 in Ca+ with sub-Hz precision as well as the nuclear mass ratios with relative uncertainties below 4×10-11 for the five stable, even isotopes of calcium (Ca40,42,44,46,48). Combined, these measurements yield a calcium KP nonlinearity with a significance of ∼103σ. Precision calculations show that the nonlinearity cannot be fully accounted for by the expected largest higher-order SM effect, the second-order mass shift, and identify the little-studied nuclear polarization as the only remaining SM contribution that may be large enough to explain it. Despite the observed nonlinearity, we improve existing KP-based constraints on a hypothetical Yukawa interaction for most of the new boson masses between 10 eV/c2 and 107 eV/c2.

Details

Organisationseinheit(en): Institut für Quantenoptik
Institut für Theoretische Physik
Externe Organisation(en): Physikalisch-Technische Bundesanstalt (PTB)
Oxford Ionics Ltd.
ETH Zürich
Max-Planck-Institut für Kernphysik
University of New South Wales (UNSW)
Technische Universität Braunschweig
Typ: Artikel
Journal: Physical review letters
Band: 134
ISSN: 0031-9007
Publikationsdatum: 10.06.2025
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Allgemeine Physik und Astronomie
Elektronische Version(en): https://doi.org/10.1103/PhysRevLett.134.233002 (Zugang: Offen )