Strong coupling constant from vacuum polarization functions in three-flavor lattice QCD with dynamical overlap fermions
Strong coupling constant from vacuum polarization functions in three-flavor lattice QCD with dynamical overlap fermions
复制标题
动态重叠费米子三味晶格 QCD 中真空偏振函数的强耦合常数
DOI：
10.1103/physrevd.82.074505
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
N. Yamada
中科院分区：
文献类型：
--
作者：
E. Shintani;S. Aoki;H. Fukaya;S. Hashimoto;T. Kaneko;T. Onogi;N. Yamada
本文通过对具有动力学重叠费米子的三味QCD真空极化函数的格点计算，确定了强耦合常数。将VPF的格点数据拟合到包含算符乘积展开的连续统微扰公式中，提取了QCD标度参数。在玻色子质量尺度下，我们得到αs（5）（MZ）=0.1181（3）（+14-12），其中第一个误差是统计误差，第二个误差是我们对各种系统不确定性的估计。
We determine the strong coupling constantfrom a lattice calculation of vacuum polarization functions (VPF) in three-flavor QCD with dynamical overlap fermions. Fitting lattice data of VPF to the continuum perturbative formula including the operator product expansion, we extract the QCD scale parameter. At theboson mass scale, we obtain αs(5)(MZ)=0.1181(3)(+14-12), where the first error is statistical and the second is our estimate of various systematic uncertainties.