论文标题
模拟稀有kaon衰减$ k^{+} \toπ^{+} \ ell^{+} {+} \ ell^{ - } $使用域壁lattice QCD带有物理灯夸克质量
Simulating rare kaon decays $K^{+}\toπ^{+}\ell^{+}\ell^{-}$ using domain wall lattice QCD with physical light quark masses
论文作者
论文摘要
我们报告了电磁形构成$ v(z)$的物理光夸克质量的第一个计算,描述了对$ k^+\toπ^+\ ell^el^+el^+el^ - $衰减振幅的长距离贡献。计算是在2+1个风味域壁费米恩集合上执行的,其反晶格间距$ a^{ - 1} = 1.730(4)$ GEV。我们通过从三个下方的质量质量中推断出出来的魅力夸克质量来实现Glashow-iliopoulos-Maiani取消。我们获得$ v(z = 0.013(2))= -0.87(4.44)$,获得了该值的界限。大统计误差来自随机估计的夸克回路。
We report the first calculation using physical light-quark masses of the electromagnetic form factor $V(z)$ describing the long-distance contributions to the $K^+\toπ^+\ell^+\ell^-$ decay amplitude. The calculation is performed on a 2+1 flavor domain wall fermion ensemble with inverse lattice spacing $a^{-1}=1.730(4)$GeV. We implement a Glashow-Iliopoulos-Maiani cancellation by extrapolating to the physical charm-quark mass from three below-charm masses. We obtain $V(z=0.013(2))=-0.87(4.44)$, achieving a bound for the value. The large statistical error arises from stochastically estimated quark loops.