具有晶格输入的$V_{ud}$辐射修正
$V_{ud}$ radiative corrections with lattice input
摘要：
我们将描述在半轻子衰变过程的电磁辐射修正研究中的几个开创性工作，特别强调格点量子色动力学的作用。这些研究对于从π介子、自由中子和$J^P=0^+$核的β衰变中精确提取矩阵元素$V_{ud}$是必不可少的，并且对于解决最近出现的几个涉及$V_{ud}$和$V_{us}$的异常是至关重要的，这些异常可能为标准模型之外的物理学提供线索。
英文摘要：
We will describe several pioneering efforts in the study of electromagnetic radiative corrections to semileptonic decay processes, with particular emphasis on the role of lattice QCD. These studies are essential for the precise extraction of the matrix element $V_{ud}$ from beta decays of pion, free neutron and $J^P=0^+$ nuclei, and are crucial to address several recently-emerged anomalies involving $V_{ud}$ and $V_{us}$, which may provide hints for physics beyond the Standard Model.
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