发表机构
Karlsruhe Institute of Technology; Deutsches Elektronen-Synchrotron DESY; University of Manchester（卡尔斯鲁厄理工学院; 德国电子同步加速器研究所; 曼彻斯特大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究聚焦2HDM，利用FCC-ee 240 GeV运行的预期精度，探索其通过希格斯辐射产生过程间接揭示电弱能标附近BSM物理的潜力。
AI 中文摘要
未来环形正负电子对撞机（FCC-ee）将通过希格斯玻色子与Z玻色子的伴随产生，以前所未有的精度探测希格斯玻色子和电弱能标的相关特性。本研究聚焦于双希格斯二重态模型（2HDM），在次领头阶的小而具体的参数空间内构建FCC-ee的精度约束条件。研究表明，FCC-ee在240 GeV运行时的预期精度，将能够对接近对齐极限的、与超出标准模型（BSM）相关的希格斯区相互作用进行精确分析。由于2HDM中导致产生截面与标准模型预期产生偏差的关键因素（新标量态的存在、希格斯混合以及非平凡的希格斯间耦合），通常也存在于比2HDM更复杂的扩展模型中，这一结果证明了FCC-ee在电弱能标附近揭示BSM物理的间接潜力。
英文摘要
The Future Circular Electron-Positron Collider (FCC-ee) will probe aspects of the Higgs boson and the electroweak scale with unprecedented precision via associated Higgs production with a $Z$ boson. We focus on the Two-Higgs-Doublet Model (2HDM) to frame the FCC-ee's precision constraints within a small, concrete parameter space at next-to-leading order. We demonstrate that the projected precision of the FCC-ee's 240 GeV run will enable a precise analysis of Beyond-the-Standard-Model (BSM)-relevant Higgs-sector interactions near the alignment limit. As the key aspects of the 2HDM that drive deviations of the cross section from its Standard Model expectation (presence of new scalar states, Higgs mixing, and non-trivial inter-Higgs couplings) are also typically present in extensions more complex than the 2HDM, this demonstrates the FCC-ee's indirect potential for unveiling BSM physics around the electroweak scale.
Comments21 pages, 8 figures
