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

preprint2004arXivOpen access

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.

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