发表机构
Hebei University; Chongqing University（河北大学; 重庆大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究在考虑 125 GeV 希格斯信号等实验约束的情况下，分析 CP 破缺 G3HDM 中 b 夸克等粒子的 EDM，发现模型中标量对不同粒子 EDM 的贡献抵消程度不同，导致预测结果有明显差异。
AI 中文摘要
受世代三希格斯二重态模型（G3HDM）中 Yukawa 部分新的破缺相互作用的启发，本研究聚焦该模型预测的 b 夸克、c 夸克、电子、中子及汞原子的电偶极矩（EDMs）。计算中考虑了来自 125 GeV 希格斯信号、味物理及 B 介子稀有衰变过程的实验约束，通过扫描模型允许的参数空间呈现并分析数值结果。研究发现，模型中标量对这些 EDM 的贡献可相互抵消：b 夸克、中子及汞原子 EDM 的贡献抵消通常较弱，而 c 夸克与电子 EDM 的贡献抵消相对显著，这导致对它们 EDM 的预测存在明显差异。
英文摘要
Motivated by the Yukawa interactions in the CP-violating Generational Three-Higgs-Doublet Model (G3HDM), we investigate the electric dipole moments (EDMs) of the $b$ quark, $c$ quark, electron, neutron, and mercury atom, imposing constraints from the observed $125~\mathrm{GeV}$ Higgs signals, flavor physics, and rare $B$-meson decays. We find that the $b$ quark, neutron, and mercury EDMs are predominantly controlled by top-enhanced charged-Higgs amplitudes, whose internal cancellations are generally weak. Meanwhile, pronounced pairwise cancellations between nearly degenerate neutral Higgs states occur in the $c$ quark, electron, neutron, and mercury EDMs. Using degenerate perturbation theory, we show that these cancellations originate from approximate relations among the neutral-Higgs mixing-matrix elements, which enforce the anti-alignment of the corresponding CP-odd coupling invariants.
Comments43 pages, 9 figures
