从同位旋矢量 GMO 求和规则能多精确地确定π-核子耦合常数?
高能物理 - 唯象学
2010-02-17 v1 核理论
摘要
本文对零能量正向π-核子散射的同位旋矢量 GMO 求和规则进行了批判性研究,利用最近从π介子原子实验推导出的精确的带负电π介子-质子和π介子-氘核散射长度来确定带电荷的π-核子耦合常数。这种直接测定得到的赝标量带电荷π-核子耦合常数为 14.23 ± 0.09(统计误差)± 0.17(系统误差)。我们还获得了π-核子散射长度的精确值。
引用
@article{arxiv.hep-ph/0002056,
title = {How precisely can we determine the pion-nucleon coupling constant from the isovector GMO sum rule?},
author = {B. Loiseau and T. E. O. Ericson and A. W. Thomas},
journal= {arXiv preprint arXiv:hep-ph/0002056},
year = {2010}
}
备注
Talk given at the Eighth International Symposium on Meson-Nucleon Physics and the Structure of the Nucleon, Zuoz, Switzerland, August 15-21, 1999, 5 pages, 2 figures, file menu.cls included