QCD sum rules are used to express nucleon coupling constants to pseudoscalar and axial currents, including the axial anomaly, in terms of operator matrix elements and PDF moments, with non-diagonal contributions included.
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Nucleon matrix elements of axial anomaly, axial currents and pseudoscalar currents in the QCD sum rule
QCD sum rules are used to express nucleon coupling constants to pseudoscalar and axial currents, including the axial anomaly, in terms of operator matrix elements and PDF moments, with non-diagonal contributions included.