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arXiv 2604.03382hep-ph
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全球电弱拟合对二双态模型的约束:基于CDF W-玻色子质量的考量

Global Electroweak Fit Constraints on the Two-Higgs-Doublet Model in Light of the CDF W -Boson Mass

Mohammed V University(穆罕默德五世大学)

Hindi Zouhair

AI总结:

研究CDF测量的W玻色子质量与标准模型预测的矛盾,利用电弱拟合分析二双态模型中电弱精度可观测量的辐射修正,探讨标量谱约束及对扩展希格斯扇区的探测作用。

摘要:

最近CDF II合作组对W玻色子质量的测量显示出与标准模型预测及其他实验测定之间显著的矛盾。本文在双双态模型框架内研究这一结果的影响,重点分析电弱精度可观测量的辐射修正,参数化为斜参数ΔS、ΔT和ΔU。通过全球电弱拟合,分析CDF测量如何改变偏好参数空间。证明观测到的mW偏移可通过标量扇区的质量分裂增强ΔT贡献来实现。给出标量谱的约束并与以往电弱数据结果进行比较。这些结果突显了高精度可观测量在探测扩展希格斯扇区中的作用,并提供了更新的2HDM参数空间界限。

英文摘要:

The recent measurement of the $W$ boson mass by the CDF II collaboration exhibits a significant tension with the Standard Model (SM) prediction and other experimental determinations. In this work, we investigate the implications of this result within the framework of the Two-Higgs-Doublet Model (2HDM), focusing on radiative corrections to electroweak precision observables parameterized in terms of the oblique parameters $ΔS$, $ΔT$, and $ΔU$. Using global electroweak fits, we analyze how the inclusion of the CDF measurement modifies the preferred parameter space. We show that the observed shift in $m_W$ can be accommodated in the 2HDM through enhanced contributions to $ΔT$, arising from mass splittings in the scalar sector. The resulting constraints on the scalar spectrum are presented and compared with those obtained using previous electroweak data. These results highlight the role of precision observables in probing extended Higgs sectors and provide updated bounds on viable 2HDM parameter space.

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