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Second-order hyperfine structure and its impact on new physics searches using isotope shift spectroscopy

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arxiv 2409.01530 v2 pith:NXPYTXLK submitted 2024-09-03 physics.atom-ph

classification physics.atom-ph
keywords isotopeisotopeskingnuclearplotshiftspinhyperfine
verification ladder T0 review T1 audit T2 compute T3 formal
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Recent precision isotope shift spectroscopy experiments have reported King plot non-linearities that may uncover previously hidden nuclear properties or hint at new force-carrying bosons. Interpreting the data requires many isotope pairs, but sufficient stable spin-zero nuclei are not always available. In this paper we consider the use of isotopes with non-zero nuclear spin for these studies. We confirm that observed King plot non-linearity in strontium is explained by second-order hyperfine shift in the fermionic nucleus, and we discuss the limitations of using Yb isotopes with non-zero spin in King plot studies. By introducing a specific difference of two isotopes with nuclear spin, we allow for a promising addition to future experimental schemes.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Towards a Global Search for New Physics with Isotope Shifts

    physics.atom-ph 2025-06 conditional novelty 7.0 of 10

    kifit, a new fit framework, combines isotope shift data from multiple elements into global constraints on new boson couplings to electrons and neutrons.

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