Parton distribution functions and quark orbital motion
Parton distribution functions and quark orbital motion
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帕顿分布函数和夸克轨道运动
DOI：
10.1140/epjc/s10052-007-0360-1
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
P. Zavada
中科院分区：
文献类型：
--
作者：
P. Zavada
研究了夸克-部分子模型的协变形式。讨论了结构函数和部分子分布对夸克三维本征运动的依赖关系。作为本征运动的一种特殊情况，夸克轨道动量的重要作用似乎是协变描述的直接结果。轨道运动的影响是很大的，特别是对极化结构函数。同时，给出了由极化结构函数和非极化结构函数组合得到极化夸克动量分布的方法。
A covariant version of the quark–parton model is studied. The dependence of the structure functions and parton distributions on the 3D intrinsic motion of the quarks is discussed. The important role of the orbital momentum of the quark, which is a particular case of intrinsic motion, appears as a direct consequence of the covariant description. The effect of the orbital motion is substantial, especially for polarized structure functions. At the same time, the procedure for obtaining the momentum distributions of polarized quarks from the combination of polarized and unpolarized structure functions is suggested.