论文标题
辐射校正的完整理论$ k _ {\ ell 3} $衰减和$ v_ {us} $ update
Complete theory of radiative corrections to $K_{\ell 3}$ decays and the $V_{us}$ update
论文作者
论文摘要
我们在自己的重新分析中填充了缺失的作品，对在$ k \rightarrowπμ^+ν_μ（γ）$通道中进行了严格的研究，对长距离电磁辐射校正为半抑制的Kaon衰变。通过适当的实验和晶格输入，我们在这些渠道中达到了$ 10^{ - 4} $的精确水平。这与我们先前在$ k \rightarrowπe^+ν_e（γ）$通道中的分析相媲美。通过此新结果，我们提出了一个更新的全局分析，以从半蛋白kaon衰减中提取标准模型参数$ | v_ {us} | $。我们获得$ | v_ {us} | = 0.22308（55）$和$ 0.22356（73）$，使用$ k^0 \rightArrowπ^ - $ n_f = 2+1+1+1+1+1 $和$ n_f = 2+1 $的晶格平均值。
We fill up the missing piece in our own re-analysis of the long-distance electromagnetic radiative corrections to semileptonic kaon decays by performing a rigorous study in the $K\rightarrowπμ^+ν_μ(γ)$ channels. With appropriate experimental and lattice inputs, we achieve a precision level of $10^{-4}$ in these channels. This is comparable to our previous analysis in the $K\rightarrowπe^+ν_e(γ)$ channels. With this new result, we present an updated global analysis to extract the Standard Model parameter $|V_{us}|$ from semileptonic kaon decays. We obtain $|V_{us}|=0.22308(55)$ and $0.22356(73)$, using the lattice average of the $K^0\rightarrowπ^-$ transition form factor at $N_f=2+1+1$ and $N_f=2+1$, respectively.
