Preprint

PUBDB-2025-01784

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Towards a Global Search for New Physics with Isotope Shifts

Fuchs, E. (Corresponding author)DESY* ; Kirk, F. ; Mariotti, A. ; Richter, J. ; Robbiati, M.

2025

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Please use a persistent id in citations: doi:10.3204/PUBDB-2025-01784

Report No.: DESY-25-080; TIF-UNIMI-2025-13; arXiv:2506.07303

Abstract: Isotope shifts have emerged as a sensitive probe of new bosons that couple to electrons and neutrons, and of nuclear structure. The recent Hz- or even sub-Hz-level isotope shift measurements across different elements call for a global assessment of all available data. In this work, we present the fit framework \kifit that for the first time enables a combined analysis of isotope shift data from several elements, taking into account correlations. We provide a thorough comparison of analytical methods and the fit to analyse linear and nonlinear King plots and quantify their uncertainties. Finally, we provide recommendations for future measurements that could enhance the sensitivity to new physics and offer new insights into nuclear structure.

Keyword(s): Atomic Physics (physics.atom-ph) ; High Energy Physics - Phenomenology (hep-ph) ; Nuclear Experiment (nucl-ex) ; Nuclear Theory (nucl-th) ; FOS: Physical sciences

Note: The corresponding program package kifit is publicly available on https://github.com/QTI-TH/kifit.

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Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. DFG project G:(GEPRIS)390837967 - EXC 2123: QuantumFrontiers - Licht und Materie an der Quantengrenze (390837967) (390837967)
3. SFB 1227 B10 - Die Quantengrenzen der Empfindlichkeit für den Nachweis ultraleichter dunkler Materie (B10*) (545595243) (545595243)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2025

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Database coverage:

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