$\gamma Z$ 盒子修正及其对宇称破坏深度非弹性散射的影响
The $γZ$-box correction and its impact on parity-violating deep-inelastic scattering
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中文总结 AI 辅助
本文通过有限质量计算重新评估$\gamma Z$盒子修正,避免了传统有效夸克质量方案的模糊性,并将其应用于杰斐逊实验室PVDIS测量,在$10^{-3}$水平上修正了电子-夸克耦合,对精密电弱测试具有重要意义。
中文摘要 AI 辅助
$\gamma Z$ 盒子修正是对精密宇称破坏测量的重要电弱贡献,但其传统的低能处理依赖于一种模糊的有效夸克质量方案。我们使用有限质量计算重新审视了这一修正,该计算提供了明确定义的微扰贡献,而无需引入这种辅助尺度。将结果应用于杰斐逊实验室的PVDIS测量,在$10^{-3}$水平上改变了提取的电子-夸克耦合。我们讨论了这一改变对精密电弱测试的影响,以及一致分离微扰和非微扰强子贡献的必要性。
英文摘要
The $γZ$-box correction is an important electroweak contribution to precision parity-violation measurements, but its conventional low-energy treatment relies on an ambiguous effective quark-mass prescription. We revisit this correction using a finite-mass calculation that provides a well-defined perturbative contribution without introducing such an auxiliary scale. Applying the result to the Jefferson Lab PVDIS measurement shifts the extracted electron-quark couplings at the $10^{-3}$ level. We discuss the implications of this shift for precision electroweak tests and the need for a consistent separation of perturbative and non-perturbative hadronic contributions.