New approach to axial coupling constants in the QCD sum rule

被引：4
|
作者：
Nishikawa, T
Saito, S
Kondo, Y
机构：
[1] Nagoya Univ, Dept Phys, Nagoya, Aichi 4648602, Japan
[2] Kokugakuin Univ, Tokyo 1508440, Japan
来源：
PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 11期
关键词：
D O I：
10.1103/PhysRevLett.84.2326
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We derive new QCD sum rules for the axial coupling constants by considering the correlation functions of axial-vector currents in a one-nucleon state. The QCD sum rules tell us that the axial coupling constants are expressed by nucleon matrix elements of quark-gluon composite operators which are related to the sigma terms and the moments of parton distributions. The results for the isovector axial coupling constants and the eighth component of the SU(3)(f) octet are in good agreement with experiment.
引用
收藏
页码：2326 / 2329
页数：4
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