The unintegrated gluon distribution from the modified BK equation

被引:92
|
作者
Kutak, K
Stasto, AM
机构
[1] Univ Hamburg, Inst Theoret Phys 2, D-2000 Hamburg, Germany
[2] Brookhaven Natl Lab, Nucl Theory Grp, Upton, NY 11973 USA
[3] Inst Phys Nucl, Krakow, Poland
[4] DESY, Theory Grp, D-22607 Hamburg, Germany
来源
EUROPEAN PHYSICAL JOURNAL C | 2005年 / 41卷 / 03期
关键词
D O I
10.1140/epjc/s2005-02223-0
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
We investigate the recently proposed non-linear equation for the unintegrated gluon distribution function which includes the subleading effects at small x. We obtained numerically the solution to this equation in ( x, k) space, and also the integrated gluon density. The subleading effects affect strongly the normalization and the x and k dependence of the gluon distribution. We show that the saturation scale Qs( x), which is obtained from this model, is consistent with the one used in the saturation model by Golec-Biernat and Wusthoff. We also estimate the non-linear effects by looking at the relative normalization of the solutions to the linear and non-linear equations. It turns out that the differences are quite large even in the nominally dilute regime, that is when Q(2) >> Q(s)(2). Finally, we calculate the dipole-nucleon cross section.
引用
收藏
页码:343 / 351
页数:9
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