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2HDM neutral scalars under the LHC
Journal of High Energy Physics ( IF 5.4 ) Pub Date : 2020-06-01 , DOI: 10.1007/jhep06(2020)163
Felix Kling , Shufang Su , Wei Su

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 → f f ¯ $$ f\overline{f} $$ , VV, Vh, hh , we study in particular the exotic decay channels of H/A → AZ/HZ once there is a mass hierarchy between the non-SM Higgses. We found that H/A → AZ/H Z 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 t β for heavy m A that are not covered by the other direct searches.

中文翻译:

LHC 下的 2HDM 中性标量

两个希格斯双峰模型 (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,包括直接搜索额外的非标准模型 (SM) 希格斯玻色子,以及对类 SM 希格斯耦合的精确测量,已经对 2HDM 参数空间提供了强大的约束。在本文中,我们研究了 Type-I 和 Type-II 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通道:H/A → ff ¯ $$ f\overline{f} $$ , VV, Vh, hh ,我们特别研究了 H/A → AZ/ 的奇异衰减通道HZ 一旦在非 SM Higgses 之间存在质量等级。我们发现 H/A → AZ/HZ 通道对对齐限制区域具有独特的敏感性,该区域不受传统搜索和 Higgs 精确测量的限制。该模式还扩展了其他直接搜索未覆盖的重 m A 在中间 t β 处的范围。
更新日期:2020-06-01
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