QCD sum rules: Isospin symmetry breakings in pion-nucleon couplings
- 1 January 1998
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review C
- Vol. 57 (1) , 61-68
- https://doi.org/10.1103/physrevc.57.61
Abstract
We use the method of QCD sum rules in the presence of an external point field to investigate isospin symmetry breakings in pion-nucleon couplings. Possible manifestations of such isospin symmetry breakings 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.Keywords
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