论文标题

hadronic的不确定性与$ W $玻色质量和MUON $ G-2 $异常的新物理学

Hadronic Uncertainties versus New Physics for the $W$ boson Mass and Muon $g-2$ Anomalies

论文作者

Athron, Peter, Fowlie, Andrew, Lu, Chih-Ting, Wu, Lei, Wu, Yongcheng, Zhu, Bin

论文摘要

现在,有两个单一的测量值对精确可观察物的测量值在标准模型中具有主要异常:$ W $质量的CDF测量结果显示出$7σ$偏差,而Fnal的Muon $ G-2 $实验证实了长期存在的异常,暗示着$ 4.2σ$偏差。对这些异常的新物理解释的疑问可能源于普通的公认为贡献的不确定性。我们证明,这两个异常通过执行允许辐射供应的电动贡献来沿相反的方向拉动耐达的贡献。该拟合表明,包括$ g -2 $测量值在内的CDF测量使紧张局势恶化,相反,调整减轻CDF张力的调整使$ G -2 $张力使超过$5σ$的张力恶化。这意味着,如果我们采用CDF $ W $质量测量,那么无论SM HADRONES贡献的大小如何,$ W $质量或MUON $ G-2 $中的新物理案例都是不可避免的。最后,我们证明了标准模型的混合标量链球扩展可以同时解释这两个异常。

There are now two single measurements of precision observables that have major anomalies in the Standard Model: the recent CDF measurement of the $W$ mass shows a $7σ$ deviation and the Muon $g-2$ experiment at FNAL confirmed a long-standing anomaly, implying a $4.2 σ$ deviation. Doubts regarding new physics interpretations of these anomalies could stem from uncertainties in the common hadronic contributions. We demonstrate that these two anomalies pull the hadronic contributions in opposite directions by performing electroweak fits in which the hadronic contribution was allowed to float. The fits show that including the $g - 2$ measurement worsens the tension with the CDF measurement and conversely that adjustments that alleviate the CDF tension worsen the $g-2$ tension beyond $5 σ$. This means that if we adopt the CDF $W$ mass measurement, the case for new physics in either the $W$ mass or muon $g-2$ is inescapable regardless of the size of the SM hadronic contributions. Lastly, we demonstrate that a mixed scalar leptoquark extension of the Standard Model could explain both anomalies simultaneously.

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