论文标题
自然超轻暗物质的时变精细结构常数
A Time-Varying Fine Structure Constant from Naturally Ultralight Dark Matter
论文作者
论文摘要
我们提出了一类模型，其中光子与具有时间依赖的真空期望值的超轻标量场的耦合导致良好的结构常数在时间上振荡。假定标量场构成了观察到的深色物质的全部或部分。它的质量通过离散的$ \ mathbb {z} _n $ Exchange Symmetry（将标准模型与多个副本与自身的自身副本相关联）保护了辐射校正。深色物质是由未对准机制设定的。我们表明，精细结构常数中的振荡足够大，可以在电流和近乎未来的实验中观察到。
We present a class of models in which the coupling of the photon to an ultralight scalar field that has a time-dependent vacuum expectation value causes the fine structure constant to oscillate in time. The scalar field is assumed to constitute all or part of the observed dark matter. Its mass is protected against radiative corrections by a discrete $\mathbb{Z}_N$ exchange symmetry that relates the Standard Model to several copies to itself. The abundance of dark matter is set by the misalignment mechanism. We show that the oscillations in the fine structure constant are large enough to be observed in current and near-future experiments.
