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arXiv 2202.11976hep-ph
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NNLO的Møller散射中的强子效应

Hadronic effects in Møller scattering at NNLO

Jens Erler, Rodolfo Ferro-Hernández, Ayres Freitas

摘要:

在两种不同的方案下研究了低能极化Moller散射的双圈电弱修正。我们发现有限的$Q^2$校正是在控制之下。通过弱混合角在低能处引入了对$γZ$两点函数的强子和微扰QCD修正,在电子的弱电荷$Q^e_W$中引入了$0.08\times10^{-3}$的误差.此外,通过研究方案的依赖性,我们得到了一个估计的电流微扰电弱不确定性,$δQ^e_W\approx0.23\times10^{-3}$,这是五倍小于MOLLER实验估计的精度$(δQ_W^e=1.1\times10^{-3})$。未来的工作有可能进一步减小理论误差。

英文摘要:

Two-loop electroweak corrections to polarized Moller scattering are studied in two different schemes at low energies. We find the finite $Q^2$ corrections to be well under control. The hadronic and perturbative QCD corrections to the $γZ$ two-point function are incorporated through the weak mixing angle at low energies, which introduce an error of $0.08\times10^{-3}$ in the weak charge of the electron $Q^e_W$. Furthermore, by studying the scheme dependence, we obtain an estimate of the current perturbative electroweak uncertainty, $δQ^e_W\approx0.23\times10^{-3}$, which is five times smaller than the precision estimated for the MOLLER experiment $(δQ_W^e=1.1\times10^{-3})$. Future work is possible to reduce the theory error further.

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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