用同位素位移谱探索新物理
Probing New Physics with Isotope Shift Spectroscopy
摘要：
我们研究了利用光学原子钟跃迁的同位素位移测量来探测标准模型之外的物理的可能性。我们首先推导出通用的新物理学的范围以上的GeV规模在有效场论水平，以及估计可能的新的自旋独立力介导的亚GeV状态耦合到电子和中子的限制。我们还研究了弱力，并表明同位素位移可以提供强有力的约束的$Z^0$耦合到价夸克，补充在LEP和原子宇称破坏实验的精确观测。最后，最近的实验提示的一个新的750 GeV的共振双光子的动机，我们还考虑了潜在的探测与电子，夸克和胶子的宇称保持耦合用这种方法。特别地，将双光子信号与来自$g_e-2$的间接约束和镱中的同位素位移相结合允许以前所未有的精度探测与电子的共振耦合。
英文摘要：
We investigate the potential to probe physics beyond the Standard Model with isotope shift measurements of optical atomic clock transitions. We first derive the reach for generic new physics above the GeV scale at the effective field theory level, as well as estimate the limits on possible new spin-independent forces mediated by sub-GeV states coupled to electrons and neutrons. We also study the weak force and show that isotope shifts could provide strong constraints on the $Z^0$ couplings to valence quarks, which complement precision observables at LEP and atomic parity violation experiments. Finally, motivated by recent experimental hints of a new 750 GeV resonance in diphotons, we also consider the potential to probe its parity-preserving couplings to electrons, quarks and gluons with this method. In particular, combining the diphoton signal with indirect constraints from $g_e-2$ and isotope shifts in Ytterbium allows to probe the resonance coupling to electrons with unprecedented precision.
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