标题： 迈向基于同位素位移的全球新物理搜索 显示英文标题

标题： Towards a Global Search for New Physics with Isotope Shifts

摘要： 同位素位移已成为探测与电子和中子耦合的新玻色子以及核结构的高度灵敏探针。近年来，不同元素上达到赫兹甚至亚赫兹水平的同位素位移测量呼唤对所有可用数据进行全球评估。 在这项工作中，我们提出了框架kifit，它首次实现了对来自多种元素的同位素位移数据的联合分析，并考虑了相关性。我们对分析方法进行了彻底比较，并对线性和非线性King图进行拟合以量化其不确定性。 最后，我们为未来的测量提供了建议，这些测量可能会增强对新物理的敏感度，并为核结构提供新的见解。 显示英文摘要

摘要： 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.