论文标题
在新物理学上的光谱界界的自洽提取
Self-consistent extraction of spectroscopic bounds on light new physics
论文作者
论文摘要
基本物理常数取决于基本颗粒，原子和分子的精确测量的集合。这通常是在粒子物理的标准模型〜（SM）的假设下完成的。超出SM超出新物理学的新物理学〜（NP）可以修饰基本物理常数的提取。因此，使用这些数据设置NP界限，同时假设基本物理常数的CODATA推荐值是不可靠的。正如我们在这封信中所示，SM和NP参数均可以一致的方式同时确定全球拟合。对于具有QED样耦合的光向量（例如深色光子），我们提供了一种处方，可在无质量极限的情况下恢复使用光子的变性，并且只需要在小型新物理耦合中以领先顺序计算。目前，数据显示与质子电荷半径确定部分相关的紧张局势。我们表明，可以通过包括带有风味非全世界耦合的轻标量的贡献来缓解这些方法。
Fundamental physical constants are determined from a collection of precision measurements of elementary particles, atoms and molecules. This is usually done under the assumption of the Standard Model~(SM) of particle physics. Allowing for light new physics~(NP) beyond the SM modifies the extraction of fundamental physical constants. Consequently, setting NP bounds using these data, and at the same time assuming the CODATA recommended values for the fundamental physical constants, is not reliable. As we show in this Letter, both SM and NP parameters can be simultaneously determined in a consistent way from a global fit. For light vectors with QED-like couplings, such as the dark photon, we provide a prescription that recovers the degeneracy with the photon in the massless limit, and requires calculations only at leading order in the small new physics couplings. At present, the data show tensions partially related to the proton charge radius determination. We show that these can be alleviated by including contributions from a light scalar with flavor non-universal couplings.
