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arXiv 2210.02456hep-ph
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Higgs平方

Higgs Squared

Csaba Csaki, Ameen Ismail, Maximilian Ruhdorfer, Joseph Tooby-Smith

AI总结:

本文提出一种基于2HDM和软破缺$D_8$对称性的Higgs-VEV敏感算符,用于宇宙选择模型,仅需百分级微调,并可用于中微子质量跷跷板机制。

摘要:

我们提出了一种新的对Higgs真空期望值敏感的算符构造,该算符可用作电弱层级问题宇宙选择模型中的触发算符。我们的算符不包含任何在SM规范对称性下带电的自由度,从而减少了所得模型中的微调。我们的构造基于对二Higgs双峰模型(2HDM)的扩展,该模型具有一个软破缺的近似全局$D_8$对称性(正方形的对称群)。基于我们扩展Higgs扇区的宇宙坍缩模型仅具有百分级别的微调,对应于通常的小层级问题。在参数空间的大区域内,2HDM自然地被推向对齐极限。一个完整的模型需要引入费米子顶伙伴以确保费米子扇区中的近似$D_8$对称性。我们还表明,相同的扩展Higgs扇区可用于中微子质量跷跷板机制的新实现。

英文摘要:

We present a novel construction for a Higgs-VEV sensitive operator, which can be used as a trigger operator in cosmic selection models for the electroweak hierarchy problem. Our operator does not contain any degrees of freedom charged under the SM gauge symmetries, leading to reduced tuning in the resulting models. Our construction is based on the extension of a two Higgs doublet model (2HDM) with a softly broken approximate global $D_8$ symmetry (the symmetry group of a square). A cosmic crunching model based on our extended Higgs sector has only a percent level tuning corresponding to the usual little hierarchy problem. In large regions of parameter space the 2HDM is naturally pushed towards the alignment limit. A complete model requires the introduction of fermionic top partners to ensure the approximate $D_8$ symmetry in the fermion sector. We also show that the same extended Higgs sector can be used for a novel implementation of the seesaw mechanism of neutrino masses.

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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