广义King线性与同位素位移的新物理搜索
Generalized King linearity and new physics searches with isotope shifts
摘要：
不同同位素的原子谱线发生了位移，揭示了原子核性质的变化。对于无自旋核，两个不同跃迁的这种同位素位移预计是线性相关的，至少在核质量和电荷分布变化的领先顺序。在King图中寻找线性破缺是一种寻找标准模型之外物理的新方法。鉴于同位素位移光谱学的最新实验进展，这些搜索的灵敏度将受到同位素质量的确定和/或可能在可观察水平引起非线性的核效应的限制。在这项工作中，我们提出了两种可能的概括传统的国王图，克服了这些限制，包括额外的同位素位移测量，从而显着扩展了新的物理范围国王图在一个纯粹的光谱驱动的方法。
英文摘要：
Atomic spectral lines for different isotopes are shifted, revealing a change in the properties of the nucleus. For spinless nuclei such isotope shifts for two distinct transitions are expected to be linearly related, at least at leading order in a change of the nuclear mass and charge distribution. Looking for a breaking of linearity in so-called King plots was proposed as a novel method to search for physics beyond the standard model. In the light of the recent experimental progress in isotope shift spectroscopy, the sensitivity of these searches will become limited by the determination of the isotope masses and/or by nuclear effects which may induce nonlinearities at an observable level. In this work, we propose two possible generalizations of the traditional King plot that overcome these limitations by including additional isotope shift measurements, thus significantly extending the new physics reach of King plots in a purely spectroscopy-driven approach.
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