The C2HDM revisited
The C2HDM revisited
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DOI：
10.1007/jhep02(2018)073
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发表时间：
2017-11
影响因子：
5.4
通讯作者：
Duarte Fontes;M. Mühlleitner;J. Romão;R. Santos;J. P. Silva;J. Wittbrodt
中科院分区：
文献类型：
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作者：
Duarte Fontes;M. Mühlleitner;J. Romão;R. Santos;J. P. Silva;J. Wittbrodt
复杂的双希格斯双重态模型是扩展标准模型的标量部分以包含新的cp违反源的最简单方法之一。该模型已被用作在大型强子对撞机上寻找cp违反的基准模型，并作为宇宙物质-反物质不对称的可能解释。在这项工作中，我们重新全面详细地分析了软破缺的2对称复双希格斯双重态模型（C2HDM）。我们提供代码C2HDM_HDECAY，在著名的HDECAY程序中实现C2HDM，该程序计算衰减宽度，包括最先进的高阶QCD校正和相关的off-shell衰减。利用C2HDM_HDECAY和最相关的理论和实验约束，包括电偶极矩（edm），我们回顾了模型的参数空间，并讨论了它的现象学。特别是，我们发现与费米子的大cp奇数耦合仍然被允许的情况，并为这些场景提供基准点。我们研究了在大型强子对撞机上发现cp违反的前景，并展示了cp违反的理论激励措施如何与可观测值相关联。
The complex two-Higgs doublet model is one of the simplest ways to extend the scalar sector of the Standard Model to include a new source of CP-violation. The model has been used as a benchmark model to search for CP-violation at the LHC and as a possible explanation for the matter-antimatter asymmetry of the Universe. In this work, we re-analyse in full detail the softly broken ℤ 2 symmetric complex two-Higgs doublet model (C2HDM). We provide the code C2HDM_HDECAY implementing the C2HDM in the well-known HDECAY program which calculates the decay widths including the state-of-the-art higher order QCD corrections and the relevant off-shell decays. Using C2HDM_HDECAY together with the most relevant theoretical and experimental constraints, including electric dipole moments (EDMs), we review the parameter space of the model and discuss its phenomenology. In particular, we find cases where large CP-odd couplings to fermions are still allowed and provide benchmark points for these scenarios. We examine the prospects of discovering CP-violation at the LHC and show how theoretically motivated measures of CP-violation correlate with observables.