摘要
核子的纵向结构函数ＦＬ以及虚光子吸收的纵向和横向散射截面的比值ＲＬ在小Ｘ区域主要取决于胶子的分布函数．而胶子的初始分布函数的形式决定了在演化过程中是否要考虑遮蔽效应．利用新的动力学演化方程分析了ＦＬ和ＲＬ，发现在部分子演化过程中存在遮蔽现象．
The longitudinal structure function FL and the ratio RL of the longitudinally to the transversely polarized virtual photon absorption cross section are mainly dependent on the gluon distribution in the small-x region. And the initial gluon distribution at Q2 = Q20 determines whether we must consider the shadowing corrections to the evolution process. In this paper we use the new evolution equation to analysis FL and RL, and found there must be Shadowing effects in the parton evolution process.
出处
《高能物理与核物理》
EI
CSCD
北大核心
2000年第11期991-997,共7页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金!(19775051
19875024
19775014
19835010)
关键词
微扰
QCD演化方程
核子
遮蔽效应
longitudinal structure function, shadowing correction, QCD evolution equation
