论文标题
LHC下的2HDM中性标量
2HDM Neutral Scalars under the LHC
论文作者
论文摘要
两个Higgs Doublet模型（2HDM）为具有扩展希格斯扇区的新物理模型提供了一个简单的框架。当前的LHC结果，包括直接搜索其他非标准模型（SM）Higgs玻色子，以及对SM样HigGS耦合的精确测量，已经对2HDM参数空间提供了强大的约束。在本文中，我们检查了I型和II型2HDM中中性标量的这些约束。除了具有SM最终状态的直接搜索渠道外：$ h/a \ to f \ bar f，vv，vh，hh $，一旦非SM Higgses之间存在质量层次，我们特别研究了$ h/a \ to az/hz $的异国衰变通道。我们发现，$ h/a \ to az/hz $通道对对齐限制区域具有独特的敏感性，该区域不受常规搜索和希格斯精度测量的影响。此模式还扩展了中间$ \tanβ$的重型$ m_a $的覆盖范围，而其他直接搜索未涵盖。
Two Higgs Doublet Models (2HDM) provide a simple framework for new physics models with an extended Higgs sector. The current LHC results, including both direct searches for additional non-Standard Model (SM) Higgs bosons, as well as precision measurements of the SM-like Higgs couplings, already provide strong constraints on the 2HDM parameter spaces. In this paper, we examine those constraints for the neutral scalars in the Type-I and Type-II 2HDM. In addition to the direct search channels with SM final states: $H/A \to f\bar f, VV, Vh, hh$, we study in particular the exotic decay channels of $H/A \to AZ/HZ$ once there is a mass hierarchy between the non-SM Higgses. We found that $H/A \to AZ/HZ$ channel has unique sensitivity to the alignment limit region which remains unconstrained by conventional searches and Higgs precision measurements. This mode also extends the reach at intermediate $\tanβ$ for heavy $m_A$ that are not covered by the other direct searches.
