arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1106.3753hep-ph
收藏

截断Mellin矩:自旋结构函数$g_2$的有用关系和意义

Truncated Mellin moments: Useful relations and implications for the spin structure function $g_2$

D. Kotlorz, A. Kotlorz

摘要:

我们回顾了我们以前的研究截断梅林矩的部分子分布。我们详细地展示了双截断矩的演化方程的推导过程。得到的分裂函数具有相同的重标形式的情况下的单截断的时刻。本文应用截断矩方法对核子自旋结构函数$g_1$和$g_2$进行了QCD分析。我们推广的Wandzura-Wilczek关系的截断矩,并找到新的求和规则。我们推导了$g_2$扭转2部分的类DGLAP演化方程并进行了数值求解。我们也发现有用的截断和未截断的时刻之间的关系。

英文摘要:

We review our previous studies of truncated Mellin moments of parton distributions. We show in detail the derivation of the evolution equation for double truncated moments. The obtained splitting function has the same rescaled form as in a case of the single truncated moments. We apply the truncated moments formalism to QCD analyses of the spin structure functions of the nucleon, $g_1$ and $g_2$. We generalize the Wandzura-Wilczek relation in terms of the truncated moments and find new sum rules. We derive the DGLAP-like evolution equation for the twist-2 part of $g_2$ and solve it numerically. We find also useful relations between the truncated and untruncated moments.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑