论文标题
在物理点的晶格QCD+QED中对轻度松性衰减的破裂校正
Isospin-breaking corrections to light leptonic decays in lattice QCD+QED at the physical point
论文作者
论文摘要
我们报告了针对轻质渗透性衰变的领先的Isospin校正的物理点RBC/UKQCD计算。这与风味物理领域的未来精确测试非常相关，尤其是cabibbo-kobayashi-maskawa矩阵的首轮单位性，其中包含元素$ v_ {us} $和$ v_ {ud} $。模拟使用域壁费米斯以$ 2+1 $的口味进行，并在路径积分中通过$ $α$和$（m_u-m_d）/λ_{\ mathrm {qcd}}} $进行了扰动的效果。我们将Qed $ _ {\ Mathrm {l}} $用于包含电磁词，并在此处讨论此处方的非本地性，该处方对Infinite-folume-folume floplation具有重大影响。
We report on the physical-point RBC/UKQCD calculation of the leading isospin-breaking corrections to light-meson leptonic decays. This is highly relevant for future precision tests in the flavour physics sector, in particular the first-row unitarity of the Cabibbo-Kobayashi-Maskawa matrix containing the elements $V_{us}$ and $V_{ud}$. The simulations were performed using Domain-Wall fermions for $2+1$ flavours, and with isospin-breaking effects included perturbatively in the path integral through order $α$ and $(m_u - m_d)/Λ_{\mathrm{QCD}}$. We use QED$_{\mathrm{L}}$ for the inclusion of electromagnetism, and discuss here the non-locality of this prescription which has significant impact on the infinite-volume extrapolation.
