标题： 下一阶确定子轴电荷和核子的极化胶子含量 显示英文标题

标题： A Next-to-Leading Determination of the Singlet Axial Charge and the Polarized Gluon Content of the Nucleon

摘要： 我们对核子极化结构函数g_1的可用实验数据进行了全面的次领头分析，并精确确定了其单态轴电荷，同时对理论不确定性进行了详尽评估。 我们发现数据现在已经足够分别确定极化夸克和胶子分布的一阶矩，并特别显示胶子贡献是大且正的。 显示英文摘要

摘要： We perform a full next-to-leading analysis of the the available experimental data on the polarized structure function g_1 of the nucleon, and give a precise determination of its singlet axial charge together with a thorough assessment of the theoretical uncertainties. We find that the data are now sufficient to separately determine first moments of the polarized quark and gluon distributions, and show in particular that the gluon contribution is large and positive.