论文标题
$ k_ {l3} $ form ys $ n_f = 2+1 $ qcd在物理点大量的物理点
$K_{l3}$ form factors in $N_f = 2+1$ QCD at physical point on large volume
论文作者
论文摘要
我们介绍了$ k_ {l3} $表格的结果，其空间范围大于$ l = $ 10 fm的卷，使用刺激性的三叶草$ n_f = 2+1+1 $ quark Action和Iwasaki Gauge Action和Iwasaki Gauge Action在$ A^{ - 1}} \ aid2.3 $ giev。 $ k_ {l3} $在零动量转移处的外形是根据SU（3）手性扰动理论的近距离（NLO）公式获得的拟合。我们估计了形式的系统错误，主要来自有限的晶格间距效应。我们还通过将结果与实验相结合，并与标准模型预测一起检查一致性，从而确定$ | v_ {US} | $的值。结果与以前的晶格计算进行了比较。
We present our results of the $K_{l3}$ form factors on the volume whose spatial extent is more than $L=$10 fm, with the physical pion and kaon masses using the stout-smearing clover $N_f = 2+1$ quark action and Iwasaki gauge action at $a^{-1}\approx2.3$ GeV. The $K_{l3}$ form factor at zero momentum transfer is obtained from fit based on the next-to-leading (NLO) formula in SU(3) chiral perturbation theory. We estimate systematic errors of the form factor, mainly coming from the finite lattice spacing effect. We also determine the value of $|V_{us}|$ by combining our result with the experiment and check the consistency with the standard model prediction. The result is compared with the previous lattice calculations.
