发表机构
Johannes Gutenberg-University; University of Pittsburgh（约翰内斯·古腾堡大学; 匹兹堡大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究计算低能宇称不守恒莫勒散射的双圈玻色子虚电弱修正，用区域展开法获解析结果，其使电子有效弱电荷偏移0.3%，评估MOLLER实验纯玻色子贡献的理论不确定度约0.1%。
AI 中文摘要
我们计算了低能下宇称不守恒莫勒（Møller）散射的主导玻色子双圈虚电弱修正。从极化不对称性中提取电子有效弱电荷，保留所有相对于树图阶贡献被(1-4sin²θ_W)⁻¹或ln²(M_{W,Z}²/Q²)增强的贡献。在Q²≪M_{W,Z}²的低能极限下，利用区域展开法获得解析结果。在该近似下，主导的双圈玻色子修正使电子有效弱电荷（或等效的极化不对称性）偏移0.3%。我们研究了该结果主导贡献的起源，并评估了纯玻色子贡献对MOLLER实验的剩余理论不确定度约为0.1%。
英文摘要
We calculate the dominant bosonic two-loop virtual electroweak corrections to parity-violating Møller scattering at low energies. The electron effective weak charge is extracted from the polarization asymmetry, retaining all contributions that are enhanced by $(1-4\sin^2θ_W)^{-1}$ or $\ln^2(M_{W,Z}^2/Q^2)$ relative to the tree-level contribution. Analytical results are obtained using the expansion by regions method in the low-energy limit $Q^2\ll M_{W,Z}^2$. Within this approximation, the dominant two-loop bosonic corrections shift the electron effective weak charge (or equivalently the polarization asymmetry) by $0.3\%$. We examine the origin of the leading contributions to this result and assess the remaining theoretical uncertainty from purely bosonic contributions for the MOLLER experiment to about 0.1%.
