The flavor singlet axial coupling of the proton with dynamical Wilson fermions
The flavor singlet axial coupling of the proton with dynamical Wilson fermions
复制标题
质子与动力学威尔逊费米子的味单线态轴向耦合
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
P. Ueberholz
中科院分区：
文献类型：
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作者：
S. Güsken;K. Schilling;N. Eicker;A. Spitz;T. Lippert;T. Struckmann;J. Viehoff;P. Ueberholz
本文给出了质子味单重态轴向耦合G1A的QCD格点计算结果。在β = 5.6的163 × 32晶格上，用nf = 2的动力学Wilson费米子进行了模拟.事实证明，对G1A的连接贡献的统计质量非常好，而断开部分是可访问的，但遭受较大的统计波动。使用一阶蝌蚪改进的重整化常数ZA，我们估计G1A = 0.20（12）。
We present the results of a full QCD lattice calculation of the flavor singlet axial coupling G1A of the proton. The simulation has been carried out on a 16 3 × 32 lattice at β = 5.6 with nf = 2 dynamical Wilson fermions. It turns out that the statistical quality of the connected contribution to G1A is excellent, whereas the disconnected part is accessible but suffers from large statistical fluctuations. Using a 1st order tadpole improved renormalization constant ZA, we estimate G 1 A = 0.20(12).