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arXiv 1302.6263hep-exhep-phnucl-ex
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弱混合角的低能测量

Low Energy Measurements of the Weak Mixing Angle

K. S. Kumar, Sonny Mantry, W. J. Marciano, P. A. Souder

摘要:

我们回顾了在$Q^2\ll M_Z^2$由$Z^0$玻色子介导的弱中性电流相互作用的精确测量的现状。它们可用于提取弱混合角$\sin^2θ_W$的值,这是标准模型的$SU(2)_L\times U(1)_Y$电弱扇区的基本参数。除了在量子回路水平上提供对电弱理论的全面测试外,这种测量还可以间接获得TeV量级或更高量级的新物理效应。经过理论介绍和三个最精确的低$Q^2$弱混合角测定的简要概述,我们描述了正在进行的实验计划和未来更灵敏的研究前景。我们还比较了计划的和建议的测量物理超出标准模型的敏感性。

英文摘要:

We review the status of precision measurements of weak neutral current interactions, mediated by the $Z^0$ boson, at $Q^2\ll M_Z^2$. They can be used to extract values for the weak mixing angle $\sin^2θ_W$, a fundamental parameter of the $SU(2)_L\times U(1)_Y$ electroweak sector of the Standard Model. Apart from providing a comprehensive test of the electroweak theory at the quantum loop level, such measurements allow indirect access to new physics effects at and beyond the TeV scale. After a theoretical introduction and a brief overview of the three most precise low $Q^2$ weak mixing angle determinations, we describe the ongoing experimental program and prospects for future more sensitive studies. We also compare sensitivities of planned and proposed measurements to physics beyond the Standard Model.

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。

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