arXiv:nucl-th/9610025·v1·Nuclear Theory
QCD Sum Rules: Isospin Symmetry Breakings in Pion-Nucleon Couplings
W-Y. P. Hwang🇹🇼 · Ze-sen Yang🇨🇳 · Y.S. Zhong🇨🇳 · Z. N. Zhou🇨🇳 · Shi-lin Zhu🇨🇳
Abstract
We use the method of QCD sum rules in the presence of an external pion field to investigate isospin symmetry breakings in pion-nucleon couplings. Possible manifestations of such isospin symmetry breaking are examined in the context of low-energy nucleon-nucleon () scattering. We discuss numerical results in relation to both the existing data and other theoretical predictions.
Comments: 14 pages, 4 figures (upon request), LateX