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arXiv 2205.03320hep-phhep-lat
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基于狄龙有效场论的复合双Higgs二重态模型

Composite two-Higgs doublet model from dilaton effective field theory

Thomas Appelquist, James Ingoldby, Maurizio Piai

摘要:

在量子有效场论的框架下,我们构造了一个复合的双Higgs二重态模型(2HDM)。该EFT描述了在近共形$SU(3)$规范场理论的晶格模拟中观察到的粒子谱。第二个希格斯双重态自然容纳在EFT中,之前用于构建一希格斯双重态模型。我们探讨的相互作用的现象学和EFT的要求,补充的信息,从数值晶格研究的$SU(3)$规范理论与八个基本(狄拉克)费米子。我们建立了一个可行的模型,适度的参数调整。在参数空间的相关部分中,我们将模型与2HDMs的常规一般描述相匹配,并评论了标量势中保管对称性(破缺)的作用。精确的电弱参数$T$的贡献提供了一个可能的解释,最近测量的W玻色子质量的CDF II。

英文摘要:

We construct a composite two-Higgs-doublet model (2HDM) within the context of dilaton effective field theory. This EFT describes the particle spectrum observed in lattice simulations of a near-conformal $SU(3)$ gauge field theory. A second Higgs doublet is naturally accommodated within the EFT, used previously to construct a one-Higgs-doublet model. We explore the interplay of phenomenological and EFT requirements, supplemented by information from numerical lattice studies of the $SU(3)$ gauge theory with eight fundamental (Dirac) fermions. We build a viable model with moderate parameter tuning. In the relevant portion of parameter space, we match the model to a conventional general description of 2HDMs, and comment on the role of custodial symmetry (breaking) in the scalar potential. Contributions to the precision electroweak parameter $T$ provide a possible explanation for the recent measurement of the W-boson mass by CDF II.

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