Charge symmetry breaking in pion-nucleon coupling constant : QCD sum rule approach

Abstract

Using the vacuum-to-pion matrix element of the correlation function of the interpolating fields of the two nucleons, the isospin splitting in the diagonal pion-nucleon coupling constant has been studied in the framework of the conventional QCD sum rule. Some of the implications of this splitting has also been discussed.

Comments: 13 pages, 4 Figures and 1 Table