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arXiv 1503.09140hep-ph
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双Higgs二重态模型中的自然标准模型排列

Natural Standard Model Alignment in the Two Higgs Doublet Model

P. S. Bhupal Dev, Apostolos Pilaftsis

摘要:

目前的LHC希格斯数据提供了强有力的约束可能偏离的耦合观察到的125 GeV的希格斯玻色子从标准模型(SM)的预期。因此,现在变得令人信服的是,任何扩展的希格斯扇区都必须遵守所谓的SM对齐限制。在双希格斯玻色子模型(2HDM)的背景下,这种对齐通常与重希格斯扇区的去耦或2HDM势中的意外取消有关。在这里,我们提出了一种新的解决方案,实现自然对齐的基础上对称性,没有解耦或微调。特别是,我们表明,在2HDMs的两个希格斯双峰获得真空期望值,只存在三个不同的对称性实现导致自然对齐。我们讨论了基于SO(5)对称群的最大对称2HDM的一些唯象学意义,并分析了重Higgs扇区的新对撞机信号,包括第三代夸克,这可能是LHC运行II阶段有用的观测工具。

英文摘要:

The current LHC Higgs data provide strong constraints on possible deviations of the couplings of the observed 125 GeV Higgs boson from the Standard Model (SM) expectations. Therefore, it now becomes compelling that any extended Higgs sector must comply with the so-called SM alignment limit. In the context of the Two Higgs Doublet Model (2HDM), this alignment is often associated with either decoupling of the heavy Higgs sector or accidental cancellations in the 2HDM potential. Here we present a new solution realizing natural alignment based on symmetries, without decoupling or fine-tuning. In particular, we show that in 2HDMs where both Higgs doublets acquire vacuum expectation values, there exist only three different symmetry realizations leading to natural alignment. We discuss some phenomenological implications of the Maximally-Symmetric 2HDM based on SO(5) symmetry group and analyze new collider signals for the heavy Higgs sector, involving third-generation quarks, which can be a useful observational tool during the Run-II phase of the LHC.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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