论文标题
有效田间理论中的CP侵入轴相互作用
CP-violating axion interactions in effective field theory
论文作者
论文摘要
引入轴以解释QCD的$ \barθ$项的观察到的小度。标准模型扩展通常包含新的CP违规来源，例如说明宇宙的重子不对称。在存在其他CP侵入源的情况下，Peccei-Quinn机制不会消除所有CP违规，从而导致轴和标准模型场之间的CP-ODD相互作用。在这项工作中，我们使用有效的现场理论来参数违反标准模式的通用来源。我们通过使用手性扰动理论系统地系统地计算了轴轴与叶子和辐射的CP-ODD耦合。我们详细讨论了CP-ODD轴突耦合的现象学，并比较了轴突搜索的限制，例如第五力和单极 - 偶极搜索和天体物理学，以直接从电动偶极力矩实验的CP化力算子上进行限制。虽然电动偶极矩搜索的限制很紧，但提出的Ariadne实验可以潜在地改善轴突质量窗口中的现有约束。
Axions are introduced to explain the observed smallness of the $\bar θ$ term of QCD. Standard Model extensions typically contain new sources of CP violation, for instance to account for the baryon asymmetry of the universe. In the presence of additional CP-violating sources a Peccei-Quinn mechanism does not remove all CP violation, leading to CP-odd interactions among axions and Standard Model fields. In this work, we use effective field theory to parametrize generic sources of beyond-the-Standard-Model CP violation. We systematically compute the resulting CP-odd couplings of axions to leptons and hadrons by using chiral perturbation theory. We discuss in detail the phenomenology of the CP-odd axion couplings and compare limits from axion searches, such as fifth force and monopole-dipole searches and astrophysics, to direct limits on the CP-violating operators from electric dipole moment experiments. While limits from electric dipole moment searches are tight, the proposed ARIADNE experiment can potentially improve the existing constraints in a window of axion masses.
