含类矢量夸克的2HDM中的斜向参数：直面$M_W$ CDF-II反常
The oblique parameters in the 2HDM with Vector-Like Quarks: Confronting $M_W$ CDF-II Anomaly
AI总结：
针对CDF合作组测得的W玻色子质量与标准模型7σ偏差的反常，研究含类矢量夸克的2HDM的斜向参数，结合多类约束发现两类贡献的抵消效应可扩大模型参数空间。
摘要：
CDF合作组利用其积分亮度为8.8 fb$^{-1}$的$p\bar{p}$对撞完整数据集，发布了$W$玻色子质量的最新测量结果。该结果与标准模型预测的偏差约为7$σ$。本文阐释了含类矢量夸克的双希格斯二重态模型（two Higgs doublet model，2HDM）受近期发现的W玻色子质量反常的影响。研究中纳入了微扰幺正性、真空稳定性等理论约束，以及多项实验约束。本文还探究了除CDF的W玻色子质量测量外，由SLD合作组测量的有效混合角如何用于确定$S$和$T$参数。在对齐极限下，研究了2HDM中较轻的CP偶中性希格斯玻色子为大型强子对撞机（LHC）所发现粒子的情形，并论证了存在类矢量夸克时II型2HDM的参数空间如何受约束。研究发现，在大多数情形下，2HDM与类矢量夸克的贡献之间存在抵消效应，这扩大了两种模型的参数空间。
英文摘要：
The CDF collaboration has released a new measurement of the $W$ boson mass using their complete data set with 8.8 fb$^{-1}$ in $p\bar{p}$ collisions. This result deviates from the Standard Model prediction by around 7$σ$. We explain how the two Higgs doublet model (2HDM) with vector-like quarks is affected by the recently discovered W boson mass. In our study, we include both theoretical constraints such as perturbative unitarity and vacuum stability as well as a number of experimental constraints. We also look into how the effective mixing angle, measured by the SLD collaboration in addition to the CDF W-boson mass, is used to determine the $S$ and $T$ parameters. In the alignment limit, we investigate the case where the lighter CP-even neutral Higgs boson of the 2HDM is the one found at the LHC and demonstrate how the parameter space of the 2HDM type II in the presence of vector-like quarks is constrained. It is found that in most cases, there is a cancellation between the 2HDM and vector-like quarks contributions, which enlarges the parameter space of both models.
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。
