Accommodating the CDF $$W$$-boson mass measurement in the beautiful mirror model

Journal Article · 09 May 2023 · Physical Review. D.

DOI: https://doi.org/10.1103/physrevd.107.095013 · OSTI ID:1973175

Chai, Shengdu  ^[1]; Gu, Jiayin ^[2]; Wang, Lian-Tao ^[3]

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1. Fudan University, Shanghai (China); University of Chicago, IL (United States)
2. Fudan University, Shanghai (China)
3. University of Chicago, IL (United States)

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}_{FB}$$) and its measurement at the LEP experiment. The beautiful mirror model, proposed to resolve the $$A$$$^{0,b}_{FB}$$ discrepancy, introduces vectorlike quarks that modify the W -boson mass at the 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}_{FB}$$ discrepancies could be confirmed or falsified in the near future.

• Research Organization: University of Chicago, IL (United States)
• Sponsoring Organization: USDOE; National Natural Science Foundation of China (NSFC)
• Grant/Contract Number: SC0009924; SC0013642; 12035008
• OSTI ID: 1973175
• Alternate ID(s): OSTI ID: 2229258
• Journal Information: Physical Review. D., Vol. 107, Issue 9; ISSN 2470-0010
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English