Polarized parton distributions in the nucleon.
Polarized parton distributions in the nucleon.
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DOI：
10.1103/physrevd.53.6100
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发表时间：
1995-12
期刊：
影响因子：
--
通讯作者：
Gehrmann;Stirling
中科院分区：
文献类型：
--
作者：
Gehrmann;Stirling
核子的自旋分布可以用夸克和胶子的极化部分子分布函数的形式参数化。利用关于极化结构函数{ital g}{sub 1}（{ital x},{ital Q}{sup 2}）的所有可用数据，我们确定了这些微扰理论中领先和次领先阶的分布。我们提出了极化胶子分布的三种不同的、同样可能的情况，它们的{ital x}依赖性仅被当前的实验数据所松散地约束。我们研究了在未来实验中测量极化部分子分布的各种可能性。{版权所有}{ital 1996美国物理学会。}
The distribution of the spin of the nucleon among its constituents can be parametrized in the form of polarized parton distribution functions for quarks and gluons. Using all available data on the polarized structure function {ital g}{sub 1}({ital x},{ital Q}{sup 2}), we determine these distributions at both leading and next-to-leading order in perturbation theory. We suggest three different, equally possible scenarios for the polarized gluon distribution, whose {ital x} dependence is found to be only loosely constrained by current experimental data. We examine various possibilities of measuring polarized parton distributions at future experiments. {copyright} {ital 1996 The American Physical Society.}