标题： 基准测试一个衰减窗口：C2HDM中的电弱重子生成，LHC二期运行后的约束及LISA的前景 显示英文标题

标题： Benchmarking a fading window: electroweak baryogenesis in the C2HDM, LHC constraints after Run 2 and prospects for LISA

摘要： 宇宙的重子不对称性的起源仍然是粒子物理学和宇宙学中最紧迫的未解之谜之一。 电弱重子生成机制提供了一个可实验验证的解释，需要新的CP破坏源和一个强的一阶电弱相变。双希格斯二重模型（2HDM）是标准模型最简单的标量扩展，能够容纳这两种成分。 我们批判性地评估了复数2HDM（C2HDM）（具有软破缺的$\mathbb{Z}_2$对称性和希格斯扇区单一显式CP破坏源的2HDM）作为电弱重子生成框架的可行性，并首次纳入了13 TeV的LHC运行2期的所有综合结果。 通过定义针对强一阶电弱相变定制的CP破坏基准平面，我们确定了由电弱重子生成激发的参数空间区域，这些区域将在LHC和未来的基于太空的引力波实验中可被测试。 这些基准平面旨在指导正在进行的努力，以定义代表性的场景，用于探索LHC运行3及以后阶段扩展标量部门中的CP破坏，同时评估LHC与未来引力波观测站（如LISA）之间的新兴协同效应。 我们还量化了实现电弱重子生成与未观察到电子电偶极矩（EDM）之间的当前张力，发现预测的电子EDM通常超出实验限制至少一个数量级。 显示英文摘要

摘要： The origin of the baryon asymmetry of the universe remains one of the most pressing open questions in particle physics and cosmology. Electroweak baryogenesis offers an experimentally testable explanation, requiring new sources of CP violation and a strong first-order electroweak phase transition.The Two Higgs doublet model (2HDM) is the simplest scalar extension of the Standard Model that can accommodate both ingredients. We critically assess the viability of the complex 2HDM (C2HDM) (a 2HDM with a softly broken $\mathbb{Z}_2$ symmetry and a single source of explicit CP violation in the Higgs sector) as a framework for electroweak baryogenesis, incorporating for the first time a comprehensive set of LHC Run 2 results at 13 TeV. By defining CP-violating benchmark planes tailored for a strong first-order electroweak phase transition, we identify regions of parameter space motivated by electroweak baryogenesis that will be testable at the LHC, and at future space-based gravitational wave experiments. The benchmark planes are intended to guide ongoing efforts in defining representative scenarios for the exploration of CP-violation in extended scalar sectors at the LHC Run 3 and beyond, while also assessing the emerging synergy between the LHC and future gravitational wave observatories such as LISA. We also quantify the current tension between the realisation of electroweak baryogenesis and the non-observation of the electron electric dipole moment (EDM), finding that the predicted electron EDMs typically exceed the experimental limits by at least an order of magnitude.