Intrinsic glue distribution at very small x

被引:665
作者
JalilianMarian, J
Kovner, A
McLerran, L
Weigert, H
机构
[1] Physics Department, University of Minnesota, Minneapolis, MN, 55455
来源
PHYSICAL REVIEW D | 1997年 / 55卷 / 09期
关键词
D O I
10.1103/PhysRevD.55.5414
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We compute the distribution functions for gluons at very small x and not tao large values of transverse momenta. We extend the McLerran-Venugopalan model by using renormalization group methods to integrate out effects due to those gluons which generate an effective classical charge density for Weizsacker-Williams fields. We argue that this model can be extended from the description of nuclei at small x to the description of hadrons at yet smaller values of x. This generates a Lipatov-like enhancement for the intrinsic gluon distribution function and a nontrivial transverse momentum dependence as well. We estimate the transverse momentum dependence for the distribution functions, and show how the issue of unitarity is resolved in lepton-nucleus interactions.
引用
收藏
页码:5414 / 5428
页数:15
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