在Beautiful Mirror模型中容纳CDF W玻色子质量测量
Accommodating the CDF W-boson Mass Measurement in the Beautiful Mirror Model
AI总结：
本研究发现Beautiful Mirror模型通过引入多TeV质量范围的矢量型夸克，可在单圈水平同时解释CDF的W玻色子质量偏差和LEP的底夸克前后不对称性偏差，且符合当前LHC限制，有望在高亮度LHC上被验证。
摘要：
CDF II实验最近报告的W玻色子质量测量结果与标准模型预测及以往测量均存在显著偏差。此外，标准模型对底夸克前后不对称性（$A^{0,b}_{\ m FB}$）的预测与LEP实验测量之间也存在长期偏差。为解决$A^{0,b}_{\ m FB}$偏差而提出的Beautiful Mirror模型引入了矢量型夸克，这些夸克在单圈水平上修正了W玻色子质量。在本研究中，我们在模型参数空间中发现了一个可能同时解释这两个偏差的有趣区域，该区域将新夸克置于多TeV质量范围。该区域与当前来自LHC直接搜索和Higgs耦合测量的限制基本一致，但将在高亮度LHC上被彻底探测。因此，作为$m_W$和$A^{0,b}_{\ m FB}$偏差的解释，Beautiful Mirror模型有望在不久的将来被证实或证伪。
英文摘要：
The W-boson mass measurement recently reported by the CDF II experiment exhibits a significant deviation from both the Standard Model prediction and previous measurements. There is also a long-standing deviation between the Standard Model prediction of the forward-backward asymmetry of the bottom quark ($A^{0,b}_{\rm FB}$) and its measurement at the LEP experiment. The Beautiful Mirror model, proposed to resolve the $A^{0,b}_{\rm FB}$ discrepancy, introduces vector-like quarks that modify the W-boson mass at one-loop level. In this study, we find an interesting region in the model parameter space that could potentially explain both discrepancies, which puts the new quarks in the multi-TeV region. This region is mostly consistent with current LHC bounds from direct searches and Higgs coupling measurements, but will be thoroughly probed at the High Luminosity LHC. As such, the Beautiful Mirror model as an explanation of the $m_W$ and $A^{0,b}_{\rm FB}$ discrepancies could be confirmed or falsified in the near future.
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