Singlet structure function g1 at small x and small Q2

被引：6
|
作者：
Ermolaev, B. I. [1 ]
Greco, M.
Troyan, S. I.
机构：
[1] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia
[2] Univ Roma Tre, Dept Phys, I-00146 Rome, Italy
[3] Univ Roma Tre, Ist Nazl Fis Nucl, I-00146 Rome, Italy
[4] St Petersburg Inst Nucl Phys, Gatchina 188300, Russia
来源：
EUROPEAN PHYSICAL JOURNAL C | 2007年 / 50卷 / 04期
关键词：
D O I：
10.1140/epjc/s10052-007-0251-5
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：
Explicit expressions for the singlet spin structure function g(1) at small x and small Q(2) are obtained with a total resummation of the leading logarithmic contributions. It is shown that g(1) practically does not depend on x in this kinematic region. In contrast, it would be interesting to investigate its dependence on the invariant energy 2pq, because g(1), being positive at small 2pq, can turn negative at greater values of this variable. The position of the turning point is sensitive to the ratio of the initial quark and gluon densities, so its experimental detection would enable one to estimate this ratio.
引用
收藏
页码：823 / 828
页数：6
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