Title: Split-even approach to the rare kaon decay $K \to π\ell^+ \ell^-$ Show Chinese title

Title: 偶数分割方法用于稀有K介子衰变 $K \to π\ell^+ \ell^-$

Abstract: In recent years the rare kaon decay has been computed directly at the physical point. However, this calculation is currently limited by stochastic noise stemming from a light and charm quark loop GIM subtraction. The split-even approach is an alternative estimator for such loop differences, and has shown a large variance reduction in certain quantities. We present an investigation into the use of the split-even estimator in the calculation of the rare kaon decay. Show Chinese abstract

Abstract: 近年来，罕见的K介子衰变已经在物理点上直接计算出来。 然而，目前这一计算受到来自轻夸克和魅夸克环GIM减法的随机噪声的限制。 分裂偶数方法是此类环差值的另一种估计器，并在某些量中显示出较大的方差减少。 我们对在罕见K介子衰变计算中使用分裂偶数估计器进行了研究。