小x处单态结构函数g_1的跑动耦合效应
高能物理 - 唯象学
2008-11-26 v2
摘要
QCD耦合的跑动被纳入味单态结构函数g_1的红外演化方程中。我们获得了包括双对数贡献完全求和并考虑跑动耦合的g_1的显式表达式。我们预测渐近地g_1 ~ x^{- \Delta_S},其中截距\Delta_S = 0.86,是非单态截距的两倍多。我们讨论了初始夸克(\delta q)和胶子(\delta g)密度对x << 1处g_1符号的影响,并获得了联系\delta q和\delta g的显式表达式。
引用
@article{arxiv.hep-ph/0307128,
title = {Running coupling effects for the singlet structure function g_1 at small x},
author = {B. I. Ermolaev and M. Greco and S. I. Troyan},
journal= {arXiv preprint arXiv:hep-ph/0307128},
year = {2008}
}
备注
The sign of g_1 at small x is discussed in more details, 3 refs are added